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Schweitzer Engineering Laboratories SEL-311L Instruction Manual

Schweitzer Engineering Laboratories SEL-311L Instruction Manual

Line current differential protection and automation system

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SEL-311L

LINE CURRENT DIFFERENTIAL

PROTECTION AND AUTOMATION SYSTEM

INSTRUCTION MANUAL

SCHWEITZER ENGINEERING LABORATORIES

2350 NE HOPKINS COURT

PULLMAN, WA USA 99163-5603

TEL: (509) 332-1890

FAX: (509) 332-7990

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Page 1 SEL-311L LINE CURRENT DIFFERENTIAL PROTECTION AND AUTOMATION SYSTEM INSTRUCTION MANUAL SCHWEITZER ENGINEERING LABORATORIES 2350 NE HOPKINS COURT PULLMAN, WA USA 99163-5603 TEL: (509) 332-1890 FAX: (509) 332-7990...
Page 2 All brand or product names appearing in this document are the trademark or registered trademark of their respective holders. Schweitzer Engineering Laboratories, SEL , Connectorized, Job Done, SEL-PROFILE, and are registered trademarks of Schweitzer Engineering Laboratories. OGIC The English language manual is the only approved SEL manual.
Page 3 Updated Optoisolated Input Ratings information in Relay Specifications. − Corrected references to figures in Section 3 in Relay Element Settings Ranges and Accuracies. Section 2: − Updated table SEL-311L Relay Line Current Differential Electrical Interface Cable Application. Section 3: − Added OPO Open Pole Option (52,27). −...
Page 4 Added new Appendix K: SEL-5030 ™. ERATOR 20010820 Appendix A: − Internal changes to improve EIA-422 clock detection. 20010717 Appendix A: − Internal changes to correct unused CT scaling issue. 20010625 New Manual Release. Manual Change Information Date Code 20011112 SEL-311L Instruction Manual...
Page 5 PORT COMMUNICATIONS AND COMMANDS SECTION 11: FRONT-PANEL INTERFACE SECTION 12: STANDARD EVENT REPORTS AND SER SECTION 13: TESTING, TROUBLESHOOTING, AND COMMISSIONING SECTION 14: APPLICATION SETTINGS FOR SEL-311L RELAYS SECTION 15: APPENDICES Appendix A: Firmware Versions Appendix B: Firmware Upgrade Instructions...
Page 7: Table Of Contents
Figure 1.2: Typical Two-Terminal Application With Voltage Inputs............1-6 Figure 1.3: Typical Three-Terminal Application With Optional Third Communications Channel ..........................1-6 Figure 1.4: SEL-311L Relay Inputs and Outputs ...................1-7 Figure 1.5: SEL-311L Relay Communications Interfaces..............1-8 Figure 1.6: SEL-311L Relay Communications Connections Examples..........1-9...
Page 9: Introduction And Specifications
SECTION 1: INTRODUCTION AND SPECIFICATIONS This instruction manual covers the SEL-311L, a digital line current differential relay with integrated communications interfaces. In addition to line current differential protection, the SEL-311L Relay contains all the protection, control, and communication features available in the SEL-311C Relay including distance, directional, and nondirectional overcurrent protection;...
Page 10: Instruction Manual Sections Overview
Purchase the SEL-311L Relay with one or a combination of two of the following line current differential channel interfaces: • Isolated EIA-422 • Isolated G.703 codirectional • 850 nm Multimode Fiber (IEEE Propose Standard PC37.94) • 1300 nm Direct Fiber See the SEL-311L Relay Model Option table (MOT) for available combinations.
Page 11 Relay Word bit table and definitions (Relay Word bits are used in SEL control OGIC equation settings) • Settings Sheets for general relay, SEL control equation, global, SER, text OGIC label, and serial port settings Date Code 20011112 Introduction and Specifications SEL-311L Instruction Manual...
Page 12 The Settings Sheets can be photocopied and filled out to set the SEL-311L Relay. Note that these sheets correspond to the serial port SET commands listed in Table 9.1. See Section 14 for a description of Application Settings APP = 87L, 87L21, and 87L21P.
Page 13: Applications
™ Communications IRRORED • Appendix J: Example Calculations for 87L Settings The SEL-311L Relay Command Summary briefly describes the serial port commands that are described in detail in Section 10: Current Differential Communications and Serial Port Communications and Commands. PPLICATIONS Dedicated Fiber 850 nm multimode (C37.94) or...
Page 14: Figure 1.2: Typical Two-Terminal Application With Voltage Inputs
Figure 1.2: Typical Two-Terminal Application With Voltage Inputs (Optional) CH X CH X SEL-311L SEL-311L CH Y CH Y SEL-311L DWG: M311L006a Figure 1.3: Typical Three-Terminal Application With Optional Third Communications Channel Introduction and Specifications Date Code 20011112 SEL-311L Instruction Manual...
Page 15: Ac/Dc Connections
Figure 1.4 and Figure 1.5 show general connection points. See General Specifications later in this section and Section 2: Installation for more information on hardware and connections. Figure 1.4: SEL-311L Relay Inputs and Outputs Date Code 20011112 Introduction and Specifications...
Page 16: Figure 1.5: Sel-311L Relay Communications Interfaces
Figure 1.5: SEL-311L Relay Communications Interfaces Introduction and Specifications Date Code 20011112 SEL-311L Instruction Manual...
Page 17: Figure 1.6: Sel-311L Relay Communications Connections Examples
NTERROGATION See Port Connector and Communications Cables in Section 10: Current Differential Communications and Serial Port Communications and Commands for more communications connection information. Figure 1.6: SEL-311L Relay Communications Connections Examples Date Code 20011112 Introduction and Specifications SEL-311L Instruction Manual...
Page 18: Relay Specifications
ELAY PECIFICATIONS Important: Do not use the following specification information to order an SEL-311L Relay. Refer to the actual ordering information sheets. General Specifications Terminal Connections: Rear Screw-Terminal Tightening Torque: Minimum: 8-in-lb (0.8 Nm) Maximum: 12-in-lb (1.4 Nm) Terminals or stranded copper wire. Ring terminals are recommended.
Page 19 System Frequency: 50 or 60 Hz Phase Rotation: ABC or ACB (settable) Frequency Tracking Range: 40.1–65 Hz Serial Communications Ports: EIA-232: 1 Front and 2 Rear EIA-485: 1 Rear, 2100 Vdc isolation Baud Rate: 300–38400 Date Code 20011112 Introduction and Specifications 1-11 SEL-311L Instruction Manual...
Page 20 IEEE C37.90.2–1995, 35 V/m Surge Withstand: IEEE C37.90.1–1989, 3000 V oscillatory, 5000 V transient 1 MHz Burst Disturbance: IEC 60255-22-1–1988, Severity Level 3 (2500 V common and 1000 V differential mode) 1-12 Introduction and Specifications Date Code 20011112 SEL-311L Instruction Manual...
Page 21: Processing Specifications
Current Differential Processing 16 times per power system cycle for line current differential protection and tripping logic. Backup Protection and Control Processing 4 times per power system cycle. Date Code 20011112 Introduction and Specifications 1-13 SEL-311L Instruction Manual...
Page 22: Relay Element Settings Ranges And Accuracies
±0.01 A secondary (1 A nominal) , 3I , 3I (Remote): ±3% , 3I , 3I (Total): ±3% Substation Battery Voltage Monitor Specifications Pickup Range: 20–300 Vdc, 1 Vdc steps Pickup Accuracy: ±2% of setting 1-14 Introduction and Specifications Date Code 20011112 SEL-311L Instruction Manual...
Page 23 ± 5% of setting at line angle for 30 ≤ SIR ≤ 60 Accuracy: ± 3% of setting at line angle for SIR < 30 < 5% of setting plus steady state accuracy Transient Overreach: Date Code 20011112 Introduction and Specifications 1-15 SEL-311L Instruction Manual...
Page 24 OFF, 0.00–150.00 V, 0.01 V steps (various elements) OFF, 0.00–260.00 V, 0.01 V steps (phase-to-phase elements) Steady-State Pickup Accuracy: ±1 V and ±5% of setting Transient Overreach: < 5% of pickup 1-16 Introduction and Specifications Date Code 20011112 SEL-311L Instruction Manual...
Page 25 Maximum Definite-Time Delay ± 0.25 cycles, ± 1% of setting at 60 Hz Accuracy: Steady-State plus Transient ± 0.01 Hz Overshoot: 20.0–150.0 V, ± 5%, ± 0.1 V Supervisory 27: Date Code 20011112 Introduction and Specifications 1-17 SEL-311L Instruction Manual...
Page 27 EIA-232 Multifunction Serial Port Voltage Jumpers ............2-21 Clock Battery ........................2-22 TABLES Table 2.1: EIA-232 Communications Cables to Connect the SEL-311L Relay to Other Devices ..2-9 Table 2.2: SEL-311L Relay Line Current Differential Electrical Interface Cable Application....2-12 Table 2.3: Output Contact Jumpers and Corresponding Output Contacts ..........2-19 Table 2.4: Move Jumper JMP23 to Select Extra Alarm.................2-20...
Page 28 Figure 2.8: IEEE Proposed Standard PC37.94 Fiber to Multiplexer Interface........2-11 Figure 2.9: 1300 nm Direct Fiber Connection ..................2-11 Figure 2.10: SEL-311L Relay Provides Line Current Differential Protection (Setting APP = 87L) 2-13 Figure 2.11: SEL-311L Relay Provides Line Current Differential, Backup Distance and Overcurrent Protection, Reclosing, and Synch Check for a Transmission Line (Setting APP = 87L21 or 87L21P)................2-14...
Page 29: Installation
SECTION 2: INSTALLATION ELAY OUNTING Figure 2.1: SEL-311L Relay Dimensions and Panel-Mount Cutout Date Code 20010625 Installation SEL-311L Instruction Manual...
Page 30 Vertical Panel Mount • Horizontal Panel Mount • Horizontal Rack Mount Figure 2.1 provides the relay dimensions and the panel-mount cutout. Refer to Figure 2.2 through Figure 2.5 for example front- and rear-panels drawings. Installation Date Code 20010625 SEL-311L Instruction Manual...
Page 31: Front- And Rear-Panel Diagrams
RONT ANEL IAGRAMS Figure 2.2: SEL-311L Relay Horizontal Rack-Mount Front-Panel and Typical Rear-Panel Drawings Date Code 20010625 Installation SEL-311L Instruction Manual...
Page 32 Figure 2.3: SEL-311L Relay Horizontal Panel-Mount Front-Panel and Typical Rear-Panel Drawings Installation Date Code 20010625 SEL-311L Instruction Manual...
Page 33 Figure 2.4: SEL-311L Relay Vertical Panel-Mount Front-Panel and Typical Rear-Panel Drawings Date Code 20010625 Installation SEL-311L Instruction Manual...
Page 34 Figure 2.5: SEL-311L Relay Rear-Panel Drawings—DB-25 Connectors at Channel X and Channel Y (Left) and Fiber-Optic Interfaces at Channel X and Channel Y (Right) Installation Date Code 20010625 SEL-311L Instruction Manual...
Page 35: Making Rear-Panel Connections
Use both types of contacts to switch either ac or dc loads. Optoisolated Inputs The optoisolated inputs in the SEL-311L Relay (IN101–IN106) are not polarity dependent and are located on the main board. Refer to General Specifications in Section 1: Introduction and Specifications for optoisolated input ratings.
Page 36: Serial Ports (1, 2, 3, And F)
The SEL-311L Relay contains the following multifunction communications ports. Serial Port 1 on all the SEL-311L Relay models is an EIA-485 port (4-wire). The Serial Port 1 plug-in connector accepts wire size AWG 24 to 12. Strip the wires 0.31 inches (8 mm) and install with a small slotted-tip screwdriver.
Page 37: Line Current Differential Communications Channel Interfaces
The line current differential protection does NOT rely upon IRIG-B time synchronization. A demodulated IRIG-B time code can be input into Serial Port 2 on any of the SEL-311L Relay models (see Table 10.2) by connecting Serial Port 2 of the SEL-311L Relay to an SEL-2020 with Cable C273A, or by using an SEL-2810 Fiber-Optic Transceiver.
Page 38 Multiplexed Network TXDA TXDA TXDB TXDB RXDA RXDA RXDB RXDB SHLD* SHLD* SEL-311L (Local) SEL-311L (Remote) * Ground cable shield at the multiplexer DWG: M311L072 Figure 2.7: Typical G.703 Codirectional Interconnection 2-10 Installation Date Code 20010625 SEL-311L Instruction Manual...
Page 39 Figure 2.8: IEEE Proposed Standard PC37.94 Fiber to Multiplexer Interface SEL-311L SEL-311L CHX/CHY CHX/CHY ST-Connectors ST-Connectors 50 or 62.5 micron Multimode or 9 micron Single-mode Fiber SEL-311L (Local) SEL-311L (Remote) DWG: M311L077 Figure 2.9: 1300 nm Direct Fiber Connection Date Code 20010625 Installation 2-11 SEL-311L Instruction Manual...
Page 40: Table 2.2: Sel-311L Relay Line Current Differential Electrical Interface Cable Application
Table 2.2: SEL-311L Relay Line Current Differential Electrical Interface Cable Application Channel Interface Interface Product Card Adapter SEL Cable Type IMUX DS562I MA406IA C453 EIA-422; RS-449 IMUX DS562I MA408IA C452 G.703 Pulsar FOCUS C451 EIA-422; RS-530 Nortel JMUX Nx64 Unit...
Page 41 ONNECTION IAGRAMS FOR ARIOUS PPLICATIONS Voltage Channels (VA, VB, VC, and VS) and current Channel IP are not used in this application. Figure 2.10: SEL-311L Relay Provides Line Current Differential Protection (Setting APP = 87L) Date Code 20010625 Installation 2-13...
Page 42 Current Channel IP does not need to be connected. Channel IP provides current for current polarized directional elements. Figure 2.11: SEL-311L Relay Provides Line Current Differential, Backup Distance and Overcurrent Protection, Reclosing, and Synch Check for a Transmission Line (Setting APP = 87L21 or 87L21P)
Page 43 In this example, current Channel IP provides current polarization for a directional element used to control ground elements. Figure 2.12: SEL-311L Relay Provides Line Current Differential, Backup Distance and Overcurrent Protection, and Reclosing for a Transmission Line (Current Polarization Source Connected to Channel IP;...
Page 44: Circuit Board Connections
Step 6. Replace the relay front-panel cover. 10. Replace any cables previously connected to serial ports or line current differential interfaces. 11. Reenergize the relay and verify that the ENABLE LED illuminates. 2-16 Installation Date Code 20010625 SEL-311L Instruction Manual...
Page 45 Figure 2.13: Jumper, Connector, and Major Component Locations on the SEL-311L Relay Main Board Date Code 20010625 Installation 2-17 SEL-311L Instruction Manual...
Page 46 Figure 2.14: Connector and Major Component Locations on the SEL-311L Relay Differential I/O Board 2-18 Installation Date Code 20010625 SEL-311L Instruction Manual...
Page 47: Output Contact Jumpers
Figure 2.13 “Extra Alarm” Output Contact Control Jumper All the SEL-311L Relays have a dedicated alarm output contact labeled ALARM (see Figure 2.2 through Figure 2.5). Often more than one alarm output contact is needed for such applications as local or remote annunciation, backup schemes, etc.
Page 48: Table 2.4: Move Jumper Jmp23 To Select Extra Alarm
Output Contact Jumpers). Thus, the dedicated ALARM output contact and the “extra alarm” output contact can be configured as the same output contact type if desired (e.g., both can be configured as “b” type output contacts). 2-20 Installation Date Code 20010625 SEL-311L Instruction Manual...
Page 49: Password And Breaker Jumpers
Table 2.6: EIA-232 Serial Port Voltage Jumper Positions for Standard Relay Shipments EIA-232 EIA-232 SEL-311L Relay Serial Port 2 Serial Port 3 Reference Model Number (rear panel) (rear panel) Figure All Models JMP2 = OFF JMP1 = OFF Figure 2.13 Date Code 20010625 Installation 2-21 SEL-311L Instruction Manual...
Page 50: Clock Battery
Boards. Set the relay date and time via serial communications port or front panel (see Section 10: Line Current Differential Communications and Serial Port Communications and Commands or Section 11: Front-Panel Interface). 2-22 Installation Date Code 20010625 SEL-311L Instruction Manual...
Page 51 Additional Distance Element Supervision ................3-45 Zone 1 Extension ........................3-46 Zone Time Delay Elements....................3-46 Out-of-Step (OOS) Characteristics .....................3-48 Use SEL-321 Relay Application Guides for the SEL-311L Relay........3-48 Overcurrent Protection........................3-52 Instantaneous/Definite-Time Overcurrent Elements ..............3-52 Phase Instantaneous/Definite-Time Overcurrent Elements ..........3-52 Residual Ground Instantaneous/Definite-Time Overcurrent Elements.......3-55 Negative-Sequence Instantaneous/Definite-Time Overcurrent Elements......3-58...
Page 52 Figure 3.14: External Fault on Three-Terminal Line With Equal Infeed from Two Terminals .....3-20 Figure 3.15: Three-Terminal Line With Internal Fault and Channel Failure..........3-21 Figure 3.16: SEL-311L Relay Protects Three-Terminal Line Using Only Two Communications Channels ........................3-22 Figure 3.17: Phase Differential Element 87LA Processing for Channel X. B and C Phases and Channel Y Are Similarly Processed................3-26...
Page 53 Figure 3.40: Out-of-Step Zone Detection Logic ..................3-50 Figure 3.41: Out-of-Step Logic.......................3-51 Figure 3.42: Levels 1 through 3 Phase Instantaneous/Definite-Time Overcurrent Elements ....3-53 Figure 3.43: SEL-311L Relay Nondirectional Instantaneous Overcurrent Element Pickup Time Curve ..........................3-55 Figure 3.44: SEL-311L Relay Nondirectional Instantaneous Overcurrent Element Reset Time Curve ..........................3-55...
Page 55: Line Current Differential, Distance, Out-Of-Step, Overcurrent, Voltage, Synchronism Check, And Frequency Elements
URRENT IFFERENTIAL LEMENTS The SEL-311L Relay contains five line current differential elements: one for each phase, and one each for negative-sequence and ground current. The phase elements provide high-speed protection for high current faults. Negative-sequence and ground elements provide sensitive protection for unbalanced faults without compromising security.
Page 56: Theory Of Operation (Patented)
1∠180°. The SEL-311L Line Current Differential Relay surrounds the point 1∠180°on the Alpha plane with a restraint region, as shown in Figure 3.3. The relay trips when the Alpha plane ratio travels...
Page 57: Setting The Restraint Region And Supervision Elements
Effect of Multiprinciple Line Protection on Dependability and Security" by Jeff Roberts, Demetrios Tziouvaras, et al. to see how other Alpha plane restraint regions compare to the restraint region of the SEL-311L Relay. In every case, the SEL-311L Relay gives significant improvement in security, sensitivity, speed, dependability, or all four.
Page 58 In a unidirectional SONET ring with 20 nodes, the transmit and receive times might be different by 2 ms, assuming adjacent nodes in one direction and 19 intervening nodes in the other direction Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 59 2 ms). In this extreme case both SEL-311L Relays estimate a one-way channel delay of 1 ms, and each relay uses local currents measured 1 ms earlier to align the local data with the received remote data.
Page 60 |, Amps sec. cycles ∠ Degrees ∠I Unsaturated - ∠I Saturated cycles M311L081 Figure 3.5: CT Saturation Causes Angle Lead and Reduction in Magnitude Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 61 (external faults, load current, etc.). All of these conditions are extreme. We shall see that the SEL-311L Relay handles them all easily without settings modifications, even if all conditions exist simultaneously.
Page 62 Therefore, the worst-case angle between negative-sequence line end currents is less than the worst-case angle between phase line end currents during an internal fault, because the source angle does not affect the negative-sequence case. Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 63 Likewise, 87LG is enabled when |I0| / |I1| > 0.05 from at least one terminal. This linearly decreases the fault resistance coverage from 132.8 ohms secondary worst case at 1/3 of Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 64: Factory Settings Give Excellent Security During External Faults
AND internal phase-to-phase-to-ground faults, and set the ground element to detect internal phase-to-ground faults. 3-10 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 65: Sel-5601 Produces Alpha Plane Plots
Relay line current differential elements also give excellent dependability. SEL-5601 Produces Alpha Plane Plots Use the SEL-5601 Analytic Assistant to visualize SEL-311L Relay event reports on the Alpha plane. Retrieve differential event reports using the CEV L or EVE C commands. The SEL-5601 reads compressed SEL-311L Relay event reports and produces Alpha plane plots for phase current, negative-sequence current, or zero-sequence current.
Page 66 Notice that the CT saturation shown in Figure 3.5 is severe, and the restraint region shown in Figure 3.9 easily contains the plot locus. 3-12 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 67 Figure 3.5 as an internal fault. Notice that the locus does not encroach on the restraint characteristic for this internal fault. Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-13 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 68: Settings Related To 87L Elements
Use the SET command to access these settings. 3-14 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 69 Figure 3.12: SEL-311L Relays Applied With Different CT Ratios APP (87L, 87L21, 87L21P, 311L) Select setting APP to match your application of the SEL-311L. Setting APP = 87L enables all line current differential based protection, plus tapped-load coordination elements and nondirectional overcurrent backup elements.
Page 70 The channel not selected by the PCHAN setting can be used as a hot-standby channel. When setting E87L = 3R the channel selected by PCHAN is used for protection and the other channel is unused. 3-16 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 71 87L protection is safely disabled. CTR_X and CTR_Y (1–6000) Set CTR_X to match setting CTR in the remote SEL-311L Relay connected to Channel X. Set CTR_Y to match setting CTR in the remote SEL-311L Relay connected to Channel Y. Settings CTR_X and CTR_Y may be different from each other and different from the local CTR setting.
Page 72: Three-Terminal Protection With The Sel-311L
The remaining (uncombined) current becomes the local current when calculating the Alpha plane ratio of remote to local current. In other words, the SEL-311L Relay converts the three-terminal line to an electrically equivalent two-terminal line, and then applies two-terminal protection algorithms.
Page 73 The same processing occurs in all three relays. This method works in all cases where the outfeed current is the smallest terminal current. Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-19 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 74 / 5) = per unit of rated secondary burden (e.g., Z sec. / 8 for class C800) X/R = system X/R ratio 3-20 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 75 Set E87L = 3 in the relay connected to two communications channels. The relays with setting E87L = 3R enable direct-transfer tripping, and setting EHSDTT is hidden. Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-21 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 76 87L Relay Word Bits Represent Local Three-Terminal Processing Only As explained above, all three SEL-311L Relays process all 87L protection elements using each of the three-terminal currents as the local current. The Relay Word bits shown in Table 3.2 are the result of using the local terminal currents as the local currents when processing the 87L elements.
Page 77: Differential Element Settings And Specifications
ETAP Y, N Tapped-Load Coordinating Overcurrent Elements: Y, N Enable Setting: Y, N (Phase) Y, N (Residual Ground) Y, N (Negative-Sequence) Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-23 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 78 ±1.50 cycles and ±5% of curve time for current between 2 and 30 multiples of pickup If 51GC is a C curve, this range is 0.05–1.0. 3-24 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 79 ±0.01 A and ±4% of setting (1 A nominal) Transient Overreach: <5% of pickup Time Delay: T50QD 0.0–16000 cycles Timer Accuracy: ±0.25 cycle and ±0.1% of setting Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-25 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 80 Figure 3.17: Phase Differential Element 87LA Processing for Channel X. B and C Phases and Channel Y Are Similarly Processed. 3-26 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 81 Figure 3.18: Negative-Sequence Differential Element 87L2 Processing for Channel X. Channel Y Processing Similar. Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-27 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 82 Figure 3.19: Ground Differential Element 87L2 Processing for Channel X. Channel Y Processing Similar. 3-28 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 83 |3I2L + 3I2R| Bits T50QP T50Q (Setting) T50QD T50QT T50QTC (SEL OGIC M311L109 Figure 3.22: Negative-Sequence Instantaneous and Definite Time Overcurrent Elements Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-29 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 84 Figure 3.23: Phase Time-Overcurrent Elements Figure 3.24: Residual Ground Time-Overcurrent Elements 3-30 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 85: Distance Elements
LEMENTS Mho Phase Distance Elements The SEL-311L Relay has four independent zones of mho phase distance protection. All zones are independently set. Zone 1 and 2 are fixed to operate in the forward direction only. Zones 3 and 4 can be set to operate in either the forward or reverse direction. The phase distance elements use positive-sequence voltage polarization for security and to create an expanded mho characteristic.
Page 86 Note that V1mem is the polarizing voltage for the positive-sequence polarized mho element and (Z • I - V) is the line drop-compensated voltage. 3-32 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 87 I • Z source M311L113 mAB < Zone Reach Figure 3.26: Positive-Sequence Polarized Mho Element With Reach Equal to Line Impedance Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-33 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 88 Internal Fault Note: V , and V are internal element voltages, not system voltages. M311L114 Figure 3.27: Compensator-Distance Phase-to-Phase Element Operation 3-34 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 89 The Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-35 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 90 Transient Overreach: < 5% of pickup Max. Operating Time: See pickup and reset time curves in Figure 3.43 and Figure 3.44. 3-36 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 91 Note 2: ABC1 and PP1 are compensator distance element calculations. Zone 1 extension, if active, is included in this calculation. DWG: M311L116 Figure 3.29: Zone 1 AB Phase Distance Logic Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-37 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 92 Zone 2 Compensator Distance Logic Note 2: ABC2 and PP2 are compensator distance element calculations. DWG: M311L117 Figure 3.30: Zone 2 AB Phase Distance Logic 3-38 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 93: Ground Distance Elements
Figure 3.31: Zones 3 and 4 AB Phase Distance Logic Ground Distance Elements The SEL-311L Relay has four independent zones of mho and quadrilateral ground distance protection. All zones are independently set. Zones 1 and 2 are forward direction only, and Zones 3 and 4 can be set in either a forward or reverse direction.
Page 94 Transient Overreach: < 5% of pickup Max. Operating Time: See pickup and reset time curves in Figure 3.43 and Figure 3.44. 3-40 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 95 Z1MG = Zone 1 Distance Setting M311L119 X1 = Zone 1 Extension from Figure 3.38 Figure 3.32: Zone 1 Mho Ground Distance Logic Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-41 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 96 = 3 for Zone 3 DWG: M311L121 n = 4 for Zone 4 Figure 3.34: Zones 3 and 4 Mho Ground Distance Logic 3-42 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 97 = A-Phase to Ground Resistance Calculation RG1 = Zone 1 Resistance Setting Figure 3.35: Zone 1 Quadrilateral Ground Distance Logic Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-43 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 98 = A-Phase to Ground Resistance Calculation M311L123 RG2 = Zone 2 Resistance Setting Figure 3.36: Zone 2 Quadrilateral Ground Distance Logic 3-44 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 99: Additional Distance Element Supervision
Figure 3.37: Zones 3 and 4 Quadrilateral Ground Distance Logic Additional Distance Element Supervision The SEL-311L Relay uses Relay Word bit VPOLV for positive-sequence memory supervision of mho and quadrilateral characteristics. VPOLV asserts when the memorized positive-sequence polarizing voltage is greater than 1 Volt.
Page 100: Zone 1 Extension
Figure 3.38: Zone 1 Extension Logic Zone Time Delay Elements The SEL-311L Relay supports two philosophies of zone timing: independent or common timing (see Figure 3.39). For the independent timing mode, the phase and ground distance elements drive separate timers for each zone. For the common mode, the phase and ground distance elements both drive a common timer.
Page 101 M4PT Z3GD Z4GD Z3GT Z4GT Zone 3 Delay Timer Logic Zone 4 Delay Timer Logic M311L126 Figure 3.39: Zone Timing Elements Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-47 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 102: Out-Of-Step (Oos) Characteristics
EOOS must equal N. Use SEL-321 Relay Application Guides for the SEL-311L Relay The out-of-step logic and settings in the SEL-311L Relay are the same as those in the SEL-321-5 Relay. Refer to Application Guide 97-13: SEL-321-5 Relay Out-of-Step Logic for applying the out-of-step logic in the SEL-311L Relay.
Page 103 Pickup Ranges: 0.5–120.0 cycles, 0.25-cycle steps Out-of-Step Angle Change Unblock Rate (Advanced Setting: EADVS = Y): UBOSBF Pickup Ranges: 1–10 unitless Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-49 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 104 Zone 6 Z1 = X6ABC Re (Z1) Zone 5 X5ABC (Internal Function) Unblock UBOSBD UBOSB M311L127 Figure 3.40: Out-of-Step Zone Detection Logic 3-50 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 105 Figure 3.41: Out-of-Step Logic Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-51 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 106: Overcurrent Protection
All of the elements listed above are either directional or nondirectional, if potentials are present at terminals VA, VB, and VC. If you apply the SEL-311L as a line current differential relay with no potentials applied, directional control is available only to residual ground elements when ORDER = I and polarizing current (IP) is available.
Page 107 E50P = 3 (Setting) 67P3 67P3D 67P3TC 67P3T (SEL OGIC DWG: M311C002 Figure 3.42: Levels 1 through 3 Phase Instantaneous/Definite-Time Overcurrent Elements Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-53 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 108 Figure 3.43 and Figure 3.44 show pickup and reset time curves applicable to all nondirectional instantaneous overcurrent elements in the SEL-311L Relay (60 Hz or 50 Hz relays). These times do not include output contact operating time and, thus, are accurate for determining element operation time for use in internal SEL control equations.
Page 109: Residual Ground Instantaneous/Definite-Time Overcurrent Elements
Maximum Minimum Applied Current (Multiples of Pickup Setting) M311L099 Figure 3.43: SEL-311L Relay Nondirectional Instantaneous Overcurrent Element Pickup Time Curve Maximum Minimum Applied Current (Multiples of Pickup Setting) M311L100 Figure 3.44: SEL-311L Relay Nondirectional Instantaneous Overcurrent Element Reset Time Curve Residual Ground Instantaneous/Definite-Time Overcurrent Elements Four levels of residual ground instantaneous/definite-time overcurrent elements are available.
Page 110 ORDER = OFF. Do not set ORDER = OFF if potentials are applied at Terminals VA, VB, and VC because setting ORDER = OFF disables the ground distance element. 3-56 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 111 M311L055 ORDER = OFF (Setting) Figure 3.45: Levels 1 Through 4 Residual Ground Instantaneous/Definite-Time Overcurrent Elements With Directional and Torque Control Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-57 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 112: Negative-Sequence Instantaneous/Definite-Time Overcurrent Elements
Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and Directional Element Logic for more information on this optional directional control. In cases where the SEL-311L Relay is applied without potentials VA, VB, and VC, use the Negative-sequence instantaneous/definite-time overcurrent elements in nondirectional mode by setting ORDER = OFF.
Page 113 ±0.25 cycles and ±0.1% of setting Timer: Transient Overreach: < 5% of setting Pickup and Reset Time Curves See Figure 3.43 and Figure 3.44. Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-59 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 114 32QR M311L056 ORDER = OFF (Setting) Figure 3.46: Levels 1 Through 4 Negative-Sequence Instantaneous/Definite-Time Overcurrent Elements With Directional and Torque Control 3-60 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 115: Time-Overcurrent Elements
(e.g., 51PTC) cannot be set directly to OGIC logical 0. See Section 9: Setting the Relay for additional time-overcurrent element setting information. Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-61 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 116 2 and 30 multiples of pickup 51PT Element Logic Outputs The logic outputs in Figure 3.47 are the Relay Word bits shown in Table 3.8. 3-62 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 117 = 0 (logical 0), if I > pickup setting 51PP and the phase time-overcurrent element is timing or is timed out on its curve Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-63 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 118 51PT is enabled and nondirectional. 51PTC = M2P The 51P/51PT uses the Zone 2 mho phase distance element to provide forward directional control. 3-64 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 119: Residual Ground Time-Overcurrent Element
Phase Time-Overcurrent Elements subsection, substituting residual ground current I = 3I ) for maximum phase current I and substituting like settings and Relay Word bits. Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-65 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 120 If potentials are not applied at Terminals VA, VB, and VC, you can use this element in a directional or nondirectional mode by performing the following: 3-66 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 121: Negative-Sequence Time-Overcurrent Element
Relay Word bits. Figure 3.49: Negative-Sequence Time-Overcurrent Element 51QT IMPORTANT: See Appendix F for information on setting negative-sequence overcurrent elements. Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-67 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 122: Voltage Elements
±1.50 cycles and ±4% of curve time for currents between (and including) 2 and Curve Timing: 30 multiples of pickup OLTAGE LEMENTS Enable SEL-311L Relay voltage elements by making the enable setting: EVOLT = Y Voltage Values Voltage elements operate from the voltage values shown in Table 3.11. 3-68...
Page 123: Voltage Element Settings
Voltage Element Settings Table 3.12 lists available voltage elements and the corresponding voltage inputs and settings ranges for the SEL-311L Relay (see Figure 1.4 for voltage input connection). Table 3.12: Voltage Elements Settings and Settings Ranges Voltage Element (Relay Word bits)
Page 124 OFF, 0.00–150.00 V secondary 59SP OFF, 0.00–150.00 V secondary Accuracy Pickup: ±1 V and ±5% of setting < 5% of setting Transient Overreach: 3-70 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 125 Figure 3.50: Single-Phase and Three-Phase Voltage Elements Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-71 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 126 Figure 3.51: Phase-to-Phase and Sequence Voltage Elements 3-72 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 127: Voltage Element Operation
. The logic outputs in Figure 3.50 are the following Relay Word bits: = 1 (logical 1), if V > pickup setting 59P ≤ pickup setting 59P = 0 (logical 0), if V Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-73 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 128: Synchronism Check Elements
OFF, the synchronism check is performed as described in either the top or bottom of Figure 3.54, depending on the slip frequency. 3-74 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 129: Synchronism Check Elements Settings
±1 V and ±5% of setting Voltage Pickup: Voltage Transient Overreach: < 5% of setting ±0.003 Hz Slip Pickup: ±4° Angle Pickup: Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-75 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 130 Figure 3.53: Synchronism Check Voltage Window and Slip Frequency Elements 3-76 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 131 Figure 3.54: Synchronism Check Elements Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-77 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 132: Synchronism Check Elements Voltage Inputs
, or V ), designated by setting SYNCP (e.g., if SYNCP = VB, then V Synchronism check voltage, from SEL-311L Relay rear-panel voltage input VS For example, if V is designated as phase input voltage V (setting SYNCP = VB), then rear-panel voltage input VS is connected to B-phase on the other side of the circuit breaker.
Page 133 The absolute value of the Slip Frequency output is run through a comparator and if the slip frequency is less than the maximum slip frequency setting, 25SF, Relay Word bit SF asserts to logical 1. Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-79 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 134 The Angle Difference Calculator calculates the angle difference between voltages V Angle Difference = (∠V - ∠V ) Voltages V and V are “Slipping” Refer to bottom of Figure 3.54. 3-80 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 135 Figure 3.55: Angle Difference Between V and V Compensated by Breaker Close Time < f and V Shown as Reference in This Example) Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-81 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 136 * is in phase with V (Angle Difference = 0 degrees), V * has to slip around another revolution, relative to V 3-82 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 137 (Angle Difference = 0 degrees). Then when the circuit breaker main contacts finally close, V is in phase with V , minimizing system shock. But with time limitations Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-83 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 138: Synchronism Check Applications For Automatic Reclosing And Manual Closing
A single output contact (e.g., OUT102 = CLOSE) can provide the close function for both automatic reclosing and manual closing (see Figure 6.1 logic output). 3-84 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 139: Frequency Elements
Setting/ Element Logic Voltages (Figure 3.57) 27B81P – Relay Word 27B81 – M311L131 – Figure 3.56: Undervoltage Block for Frequency Elements Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-85 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 140 81D6P ≥ NFREQ 81D6T (Setting E81 = 6) 81D6P < NFREQ Under- M311L145 Frequency Figure 3.57: Levels 1 Through 6 Frequency Elements 3-86 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 141 1 logic is enabled. 81D1 and 81D1T operate as overfrequency elements. 81D1 is used in testing only. Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-87 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 142: Frequency Element Operation
If system frequency is greater than 59.65 Hz (81D2P = 59.65 Hz), frequency element 2 outputs: 81D2 = logical 0 (instantaneous element) 81D2T = logical 0 (time delayed element) 3-88 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 143: Frequency Element Uses
The instantaneous frequency elements (81D1 through 81D6) are used in testing only. The time-delayed frequency elements (81D1T through 81D6T) are used for underfrequency load shedding, frequency restoration, and other schemes. Date Code 20011112 Line Current Differential, Distance, Out-of-Step, Overcurrent, 3-89 Voltage, Synchronism Check, and Frequency Elements SEL-311L Instruction Manual...
Page 145 Load-Encroachment Setting Example .................. 4-6 Convert Power Factors to Equivalent Load Angles.............. 4-7 Use SEL-321 Relay Application Guide for the SEL-311L Relay ........4-8 Directional Control for Ground Distance and Residual Ground Overcurrent Elements ....4-9 Directional Element Enables ....................4-10 Best Choice Ground Directional™...
Page 146 Overcurrent and Phase Distance Elements ..............4-18 Figure 4.14: Negative-Sequence Voltage-Polarized Directional Element for Phase Distance and Negative-Sequence Elements..................4-20 Figure 4.15: Positive-Sequence Voltage-Polarized Directional Element for Phase Distance Elements........................4-21 Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 147: Loss-Of-Potential, Ccvt Transient Detection, Load-Encroachment, And Directional Element Logic
DETECTION, LOAD-ENCROACHMENT, AND DIRECTIONAL ELEMENT LOGIC NTRODUCTION The SEL-311L Relay provides loss-of-potential (LOP) detection, CCVT transient detection, load encroachment detection, and voltage-polarized directional and distance elements when voltages are connected to terminals VA, VB, and VC. Distance element operation is described in Section 3: Line Current Differential, Distance, Out-of-Step, Overcurrent, Voltage, and Synchronism Check Elements.
Page 148: Setting Elop = Y Or Y1
ILOP (see Figure 4.9, Figure 4.10, Figure 4.14, Figure 4.15, and Figure 3.29 through Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 149: Setting Elop = N
(as occurs with ELOP = Y or Y1), nor does it enable overcurrent elements set direction forward (as occurs with ELOP = Y). If setting APP = 87L (SEL-311L is used as a line current differential relay only), setting ELOP is hidden and is internally set to ELOP = N.
Page 150: Load-Encroachment Logic
The distance elements, M1P through M4P, will not operate without directional control. Set !ZLOAD in the phase overcurrent torque control equation to block phase overcurrent operation. Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 151 ZLIN asserts to logical 1 when the load lies within this hatched region. Relay Word bit ZLOAD is the OR-combination of ZLOUT and ZLIN: ZLOAD = ZLOUT + ZLIN Date Code 20010625 Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 152: Settings Ranges
This secondary value can be calculated more expediently with the following equation: [(line-line voltage in kV) • (CT ratio)]/[(3-phase load in MVA) • (PT ratio)] Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 153: Convert Power Factors To Equivalent Load Angles
+ cos (0.95) = 180 + 18 = 198 Apply Load-Encroachment Logic to a Phase Time-Overcurrent Again, from Figure 4.3: ZLOAD = ZLOUT + ZLIN Date Code 20010625 Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 154: Use Sel-321 Relay Application Guide For The Sel-311L Relay
51PTC = !ZLOAD = !(logical 0) = NOT(logical 0) = logical 1 Use SEL-321 Relay Application Guide for the SEL-311L Relay The load-encroachment logic and settings in the SEL-311L Relay are the same as those in the SEL-321 Relay. Refer to Application Guide 93-10: SEL-321 Relay Load-Encroachment Function Setting Guidelines for applying the load-encroachment logic in the SEL-311L Relay.
Page 155: Directional Control For Ground Distance And Residual Ground Overcurrent Elements
Ground Overcurrent Elements Figure 4.5 gives an overview of how these directional elements are enabled and routed to control the ground distance and residual ground overcurrent elements. Date Code 20010625 Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 156: Directional Element Enables
Refer to Figure 4.5, Figure 4.9, Figure 4.10, and Figure 4.11. The enable output of Best Choice Ground Directional logic in Figure 4.8 determines which directional element will run. 4-10 Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 157: Directional Element Routing
Refer to Figure 4.1 and accompanying text for more information on loss-of-potential. As shown in Figure 3.29 through Figure 3.37, ILOP also disables all ground distance elements. Date Code 20010625 Loss-of-Potential, CCVT Transient Detection, 4-11 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 158 Figure 4.6: Internal Enables (32QE and 32QGE) Logic for Negative-Sequence Voltage- Polarized Directional Elements 4-12 Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 159 Figure 4.7: Internal Enables (32VE and 32IE) Logic for Zero-Sequence Voltage-Polarized and Channel IP Current-Polarized Directional Elements Date Code 20010625 Loss-of-Potential, CCVT Transient Detection, 4-13 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 160 Figure 4.8: Best Choice Ground Directional Logic 4-14 Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 161 Figure 4.9: Negative-Sequence Voltage-Polarized Directional Element for Ground Distance and Residual Ground Overcurrent Elements Date Code 20010625 Loss-of-Potential, CCVT Transient Detection, 4-15 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 162 Figure 4.10: Zero-Sequence Voltage-Polarized Directional Element for Ground Distance and Residual Ground Overcurrent Elements 4-16 Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 163 Figure 4.11: Channel IP Current-Polarized Directional Element for Ground Distance and Residual Ground Overcurrent Elements Figure 4.12: Ground Distance and Residual Ground Directional Logic Date Code 20010625 Loss-of-Potential, CCVT Transient Detection, 4-17 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 164 The Relay Word bit 32QE enables the negative-sequence voltage-polarized directional element. The settings involved with 32QE in Figure 4.6 (e.g., setting a2) are explained in a following subsection Directional Control Settings. 4-18 Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 165 Refer to Figure 4.1 and accompanying text for more information on loss-of-potential. As shown in Figure 3.29 through Figure 3.31, ILOP also disables all phase distance elements. Date Code 20010625 Loss-of-Potential, CCVT Transient Detection, 4-19 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 166 Figure 4.14: Negative-Sequence Voltage-Polarized Directional Element for Phase Distance and Negative-Sequence Elements 4-20 Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 167 The remaining directional control settings are not set automatically if setting E32 = AUTO. They have to be set by the user, whether setting E32 = AUTO or Y. These settings are: DIR3, DIR4, ORDER, and E32IV Date Code 20010625 Loss-of-Potential, CCVT Transient Detection, 4-21 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 168 Setting ORDER can be set with any combination of Q, V, and I. The order in which these directional elements are listed determines the priority in which they operate to provide Best Choice Ground Directional logic control. See Figure 4.8. 4-22 Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 169 Z2R must be greater in value than setting Z2F by 0.1 (5A nominal) or 0.5 (1A nominal). Date Code 20010625 Loss-of-Potential, CCVT Transient Detection, 4-23 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 170 It keeps the elements from operating for negative-sequence current (system unbalance), which circulates due to line asymmetries, CT saturation during three-phase faults, etc. 4-24 Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 171 For setting k2 = 0.2, the negative-sequence current (I ) magnitude has to be greater than 1/5 of the zero-sequence current (I ) magnitude in order for the negative-sequence voltage-polarized Date Code 20010625 Loss-of-Potential, CCVT Transient Detection, 4-25 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 172 It keeps the elements from operating for zero-sequence current (system unbalance), which circulates due to line asymmetries, CT saturation during three- phase faults, etc. 4-26 Loss-of-Potential, CCVT Transient Detection, Date Code 20010625 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 173 Most often, this setting is set directly to logical 1: E32IV = 1 (numeral 1) Date Code 20010625 Loss-of-Potential, CCVT Transient Detection, 4-27 Load-Encroachment, and Directional Element Logic SEL-311L Instruction Manual...
Page 174 E32IV OGIC should be deasserted to logical 0. In this example, this is accomplished by connecting a circuit breaker auxiliary contact from the identified circuit breaker to the SEL-311L Relay: E32IV = IN106 (52a connected to optoisolated input IN106) Almost any desired control can be set in SEL control equation setting E32IV.
Page 175 Trip Setting DTT ........................ 5-16 Use Existing SEL-321 Relay Application Guides for the SEL-311L Relay...... 5-16 Permissive Overreaching Transfer Trip (POTT) Logic ............. 5-17 Use Existing SEL-321 Relay POTT Application Guide for the SEL-311L Relay .... 5-17 External Inputs........................5-17 Timer Settings ........................5-18 Logic Outputs ........................
Page 176 Figure 5.8: POTT Logic........................5-21 Figure 5.9: Permissive Input Logic Routing to Trip Logic ..............5-22 Figure 5.10: SEL-311L Relay Connections to Communications Equipment for a Two-Terminal Line POTT Scheme ..................... 5-23 Figure 5.11: SEL-311L Relay Connections to Communications Equipment for a Three-Terminal Line POTT Scheme .....................
Page 177: Trip And Target Logic
TRIP AND TARGET LOGIC NTRODUCTION The SEL-311L Relay trip logic combines trip decisions from several sources into a single Relay Word bit, useful for controlling trip contacts. The relay also contains line current differential high-speed tripping logic, which bypasses the normal trip logic and directly controls trip contacts.
Page 178: 87L Tripping Qualified By The Local Disturbance Detector
See Section 3: Line Current Differential, Distance, Out-of-Step, Overcurrent, Voltage, Synchronism Check, and Frequency Elements for more information about setting E87L. The SEL-311L Relay direct transfer trip signals have outstanding security, resulting in less than one unwanted trip per 100 million channel noise bursts. The relay maximizes dependability by transmitting the direct trip signal for at least 8 cycles when an internal fault is detected.
Page 179 Figure 5.1: Line Current Differential Trip Logic With Direct Transfer Tripping, and Local Disturbance Detector Supervision Date Code 20010625 Trip and Target Logic SEL-311L Instruction Manual...
Page 180 I1 changed more than 5° or more 87LPE than 2% Inom in one cycle. I0 changed more than 5° or more than 2% Inom in one cycle. M311L103 Figure 5.3: Local Disturbance Detector Trip and Target Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 181: Backup Protection Trips
Unlatch Trip Conditions. TDURD Minimum Trip Duration Time. This timer establishes the minimum time duration for which the TRIP Relay Word bit asserts. The settable range for this timer is 4–16,000 cycles. Date Code 20010625 Trip and Target Logic SEL-311L Instruction Manual...
Page 182 TRSOTF is set with instantaneous directional and non-directional elements. Figure 5.4: Trip Logic In addition, when setting EHST 1, Relay Word bit TRIP asserts when any 87L element detects an internal fault. Trip and Target Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 183: Set Trip
OC in the SEL control equation setting 79DTL (Drive-to-Lockout). OGIC A COMM target LED option for the OPEN command is discussed in the Front-Panel Target LEDs subsection at the end of this section. Date Code 20010625 Trip and Target Logic SEL-311L Instruction Manual...
Page 184: Unlatch Trip
(unlatch trip conditions) The factory setting for the Minimum Trip Duration Timer setting is: TDURD = 9.000 cycles See the settings sheets in Section 9: Setting the Relay for setting ranges. Trip and Target Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 185: Additional Settings Examples
Input IN101 has to be deenergized (52a circuit breaker auxiliary contact has to be open) before the trip logic unlatches and the TRIP Relay Word bit deasserts to logical 0. ULTR = !52A = NOT(52A) Date Code 20010625 Trip and Target Logic SEL-311L Instruction Manual...
Page 186: Program An Output Contact For Tripping
Relay Word bit SOTFE (the output of the SOTF logic) provides the effective time window for an element in trip setting TRSOTF (e.g., TRSOTF = 50P2) to trip after the circuit breaker closes. 5-10 Trip and Target Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 187: Three-Pole Open Logic
Select OPO = 52 if 3PO is determined by circuit breaker status. Select OPO = 27 if 3PO is determined by positive-sequence voltage and if 87L protection is not used. Date Code 20010625 Trip and Target Logic 5-11 SEL-311L Instruction Manual...
Page 188: Circuit Breaker Operated Switch-Onto-Fault Logic
(circuit breaker closed) Determining Three-Pole Open Condition Without Circuit Breaker Auxiliary Contact (OPO = 52) If a circuit breaker auxiliary contact is not connected to the SEL-311L Relay and OPO = 52, control equation setting 52A may be set: OGIC...
Page 189: Close Bus Operated Switch-Onto-Fault Logic
Circuit breaker closure is detected by monitoring the dc close bus. This is accomplished by wiring an optoisolated input on the SEL-311L Relay (e.g., IN105) to the dc close bus. When a manual close or automatic reclosure occurs, optoisolated input IN105 is energized. SEL...
Page 190: Communications-Assisted Trip Logic-General Overview
SSISTED OGIC ENERAL VERVIEW The SEL-311L Relay includes communications-assisted tripping schemes that provide unit- protection for transmission lines with the help of communications. No external coordination devices are required. Figure 5.6: Communications-Assisted Tripping Scheme Refer to Figure 5.6 and the top half of Figure 5.4.
Page 191: Enable Setting Ecomm
The short delays provide necessary carrier coordination delays (waiting for the block trip signal). See Figure 5.16. These elements are entered in trip setting TRCOMM. Date Code 20010625 Trip and Target Logic 5-15 SEL-311L Instruction Manual...
Page 192: Trip Settings Trsotf And Tr
The communications-assisted tripping schemes settings in the SEL-311L Relay are very similar to those in the SEL-321 Relay. Existing SEL-321 Relay application guides can also be used in setting up these schemes in the SEL-311L Relay. The following application guides are available from SEL:...
Page 193: Permissive Overreaching Transfer Trip (Pott) Logic
Use Existing SEL-321 Relay POTT Application Guide for the SEL-311L Relay Use the existing SEL-321 Relay POTT application guide (AG95-29) to help set up the SEL-311L Relay in a POTT scheme (see preceding subsection Communications-Assisted Trip Logic— General Overview for more setting comparison information on the SEL-321/SEL-311L Relays).
Page 194: Timer Settings
The following logic outputs can be tested by assigning them to output contacts. See Output Contacts in Section 7: Inputs, Outputs, Timers, and Other Control Logic for more information on output contacts. 5-18 Trip and Target Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 195: Weak-Infeed Logic And Settings
SEL-311L Relay Weak-Infeed Logic Enable the weak-infeed logic by setting EWFC = Y. The SEL-311L Relay provides additional logic (see Figure 5.8) for weak-infeed terminals to permit rapid tripping of both line terminals for internal faults near the weak terminal. The strong terminal is permitted to trip via the permissive signal echoed back from the weak terminal.
Page 196 In a three-terminal line scheme, output contact OUT107 is set the same as OUT105 (see Figure 5.11): OUT107 = KEY EKEY—Echo Key Permissive Trip Permissive trip signal keyed by Echo logic (used in testing). 5-20 Trip and Target Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 197 Figure 5.8: POTT Logic Date Code 20010625 Trip and Target Logic 5-21 SEL-311L Instruction Manual...
Page 198: Variations For Permissive Underreaching Transfer Trip (Putt) Scheme
Figure 5.11 shows output contacts OUT105 and OUT107 connected to separate communications equipment, for the two remote terminals. Both output contacts are programmed the same (OUT105 = KEY and OUT107 = KEY). 5-22 Trip and Target Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 199 (TX) on the communication equipment in Figure 5.11. Then output contact OUT107 can be used for another function. Figure 5.10: SEL-311L Relay Connections to Communications Equipment for a Two-Terminal Line POTT Scheme Figure 5.11: SEL-311L Relay Connections to Communications Equipment for a...
Page 200: Directional Comparison Unblocking (Dcub) Logic
In two-terminal line DCUB applications (setting ECOMM = DCUB1), a permissive trip signal is received from one remote terminal. One optoisolated input on the SEL-311L Relay (e.g., input IN104) is driven by a communications equipment receiver output (see Figure 5.14). Make...
Page 201: Timer Settings
In two-terminal line DCUB applications (setting ECOMM = DCUB1), a loss-of-guard signal is received from one remote terminal. One optoisolated input on the SEL-311L Relay (e.g., input IN105) is driven by a communications equipment receiver output (see Figure 5.14). Make...
Page 202: Logic Outputs
UBB, depending on enable setting ECOMM = DCUB1 or DCUB2. Relay Word bit UBB is the unblock block input into the trip logic in Figure 5.4. When UBB asserts to logical 1, tripping is blocked. 5-26 Trip and Target Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 203 Figure 5.12: DCUB Logic Date Code 20010625 Trip and Target Logic 5-27 SEL-311L Instruction Manual...
Page 204: Installation Variations
Depending on the installation, perhaps one output contact (e.g., OUT105 = KEY) could be connected in parallel to both transmitter inputs (TX) on the communications equipment in Figure 5.15. Then output contact OUT107 can be used for another function. 5-28 Trip and Target Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 205 Figure 5.14: SEL-311L Relay Connections to Communications Equipment for a Two-Terminal Line DCUB Scheme (Setting ECOMM = DCUB1) Figure 5.15: SEL-311L Relay Connections to Communications Equipment for a Three-Terminal Line DCUB Scheme (Setting ECOMM = DCUB2) Date Code 20010625 Trip and Target Logic...
Page 206: Directional Comparison Blocking (Dcb) Logic
Use Existing SEL-321 Relay DCB Application Guide for the SEL-311L Relay Use the existing SEL-321 Relay DCB application guide (AG93-06) to help set up the SEL-311L Relay in a DCB scheme (see preceding subsection Communications-Assisted Trip Logic— General Overview for more setting comparison information on the SEL-321/SEL-311L Relays).
Page 207 Program an output contact to include nondirectional carrier start, in addition to directional start. For example, SEL control equation setting OUT105 is set: OGIC OUT105 = DSTRT + NSTRT Date Code 20010625 Trip and Target Logic 5-31 SEL-311L Instruction Manual...
Page 208 The received block trip input (e.g., BT = IN104) is routed through a dropout timer (BTXD) in the DCB logic in Figure 5.16. The timer output (BTX) is routed to the trip logic in Figure 5.4. 5-32 Trip and Target Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 209 Depending on the installation, perhaps one output contact (e.g., OUT106 = STOP) can be connected in parallel to both STOP inputs on the communications equipment in Figure 5.18. Then output contact OUT104 can be used for another function. Date Code 20010625 Trip and Target Logic 5-33 SEL-311L Instruction Manual...
Page 210 Figure 5.18 also shows communications equipment RX (receive) output contacts from each remote terminal connected to separate inputs IN104 and IN106 on the SEL-311L Relay. The inputs operate as block trip receive inputs for the two remote terminals and are used in the...
Page 211 Figure 5.18: SEL-311L Relay Connections to Communications Equipment for a Three-Terminal Line DCB Scheme RONT ANEL ARGET Table 5.1: SEL-311L Relay Front-Panel Target LED Definitions LED Label Number Definition Relay Enabled—see subsection Relay Self-Tests in Section 13: Testing, Troubleshooting, and Commissioning...
Page 212 Section 8: Breaker Monitor and Metering Functions). Fault current values are not to be accrued as maximum current values in maximum/minimum metering. Add Relay Word bit 87L to SEL control equation setting FAULT when the SEL-311L OGIC Relay is used without relaying potentials.
Page 213 The 50/51 target LED illuminates at the rising edge of trip if any overcurrent element (except 50L) is asserted. This includes 50, 51, 51T, 67, 67T, T50, T51, T51T, and T50T. Date Code 20010625 Trip and Target Logic 5-37 SEL-311L Instruction Manual...
Page 214 (see Rotating Default Display in Section 7 and Section 11, also): SV8 = (SV8 + SV7T) * !TRGTR DP3 = SV8 DP3_1 = BREAKER FAILURE DP3_0 = (blank) 5-38 Trip and Target Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 215 Pushbutton (Relay Word bit TRGTR pulses to logical 1, unlatching SV8 and in turn deasserting DP3). Thus, front-panel rotating default displays can be easily reset along with the front-panel targets by pushing the TARGET RESET Pushbutton. Date Code 20010625 Trip and Target Logic 5-39 SEL-311L Instruction Manual...
Page 217 Table 6.3: Shot Counter Correspondence to Relay Word Bits and Open Interval Times......6-18 Table 6.4: Reclosing Relay SEL Control Equation Settings Example...........6-18 OGIC Table 6.5: Open Interval Time Settings Example ..................6-24 Date Code 20011112 Close and Reclose Logic SEL-311L Instruction Manual...
Page 218 Figure 6.6: Reclosing Sequence From Reset to Lockout With Example Settings .......6-16 Figure 6.7: Sequence Coordination Between the SEL-311L Relay and a Line Recloser.....6-27 Figure 6.8: Operation of SEL-311L Relay Shot Counter for Sequence Coordination With Line Recloser (Additional Settings Example 1)..............6-28 Figure 6.9: Operation of SEL-311L Relay Shot Counter for Sequence Coordination With Line...
Page 219: Close And Reclose Logic
(e.g., manual close initiation via serial port or optoisolated inputs). If automatic reclosing is not needed, but the SEL-311L Relay is to close the circuit breaker for other close conditions (e.g., manual close initiation via serial port or optoisolated inputs), then this subsection is the only subsection that needs to be read in ®...
Page 220: Set Close
Breaker) in Section 10: Line Current Differential Communications and Serial Port Communications and Commands for more information on the CLOSE Command. More discussion follows later on the factory settings for setting CL. Close and Reclose Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 221: Unlatch Close
ULCL has a default of TRIP + TRIP87. This prevents the OGIC CLOSE Relay Word bit from being asserted any time the TRIP or TRIP87 Relay Word bits are asserted. See Trip Logic in Section 5: Trip and Target Logic. Date Code 20010625 Close and Reclose Logic SEL-311L Instruction Manual...
Page 222: Defeat The Close Logic
OUT103 with the following SEL control equation: OGIC OUT103 = CLOSE See Output Contacts in Section 7: Inputs, Outputs, Timers, and Other Control Logic for more information on programming output contacts. Close and Reclose Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 223: Reclose Supervision Logic
Word bit to logical 1. This input into the close logic in Figure 6.1 is an output of the reclose supervision logic in the following Figure 6.2. Figure 6.2: Reclose Supervision Logic (Following Open Interval Time-Out) Date Code 20010625 Close and Reclose Logic SEL-311L Instruction Manual...
Page 224 Figure 6.3: Reclose Supervision Limit Timer Operation (Refer to Bottom of Figure 6.2) Close and Reclose Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 225: Settings And General Operation
If 79CLS asserts to logical 1 at any time during this 79CLSD time window, then the open interval time-out will propagate onto the final close logic in Figure 6.1 to automatically reclose the circuit breaker. Date Code 20010625 Close and Reclose Logic SEL-311L Instruction Manual...
Page 226 The unlatching of the sealed-in reclosing relay open interval time-out condition by the assertion of SEL control equation setting 79CLS indicates successful propagation of a reclosing relay OGIC open interval time-out condition on to the close logic in Figure 6.1. Close and Reclose Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 227: Settings Example
SEL-311L(1) Relay Before allowing circuit breaker 52/1 to be reclosed after an open interval time-out, the SEL-311L(1) Relay verifies that Bus 1 voltage is hot and the transmission line voltage is dead. This requires reclose supervision settings: 79CLSD = 0.00 cycles...
Page 228 The SEL-311L(2) Relay starts open interval timing after circuit breaker 52/1 at the remote end has reenergized the line. The SEL-311L(2) Relay has to see Bus 2 hot, transmission line hot, and in synchronism across open circuit breaker 52/2 for open interval timing to begin. Thus, SEL-...
Page 229: Reclosing Relay
SEL-311L(2) Relay (see Figure 7.23 and Figure 7.24). Note the built-in 3-cycle qualification of the synchronism check voltages shown in Figure 3.53. Additional Settings Example 2 Refer to subsection Synchronism Check Elements in Section 3: Line Current Differential, Distance, Out-of-Step, Overcurrent, Voltage, Synchronism Check, and Frequency Elements.
Page 230: Reclosing Relay States And General Operation
When in reset or lockout, the corresponding Relay Word bit asserts to logical 1, and the LED illuminates. Automatic reclosing only takes place when the relay is in the Reclose Cycle State. 6-12 Close and Reclose Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 231: Reclosing Relay States After A Settings Or Setting Group Change
The shot counter is driven to last shot (last shot corresponding to the new settings; see discussion on last shot that follows). • The reset timer is loaded with reset time setting 79RSLD (see discussion on reset timing later in this section). Date Code 20010625 Close and Reclose Logic 6-13 SEL-311L Instruction Manual...
Page 232: Defeat The Reclosing Relay
52A OGIC and CL. Also see Optoisolated Inputs in Section 7: Inputs, Outputs, Timers, and Other Control Logic for more discussion on SEL control equation setting 52A. OGIC 6-14 Close and Reclose Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 233: Reclosing Relay Timer Settings
In the above example settings, open interval 1 time setting, 79OI1, times first. If the subsequent first reclosure is not successful, then open interval 2 time setting, 79OI2, starts Date Code 20010625 Close and Reclose Logic 6-15 SEL-311L Instruction Manual...
Page 234 52A. Also see Optoisolated Inputs in Section 7: OGIC Inputs, Outputs, Timers, and Other Control Logic for more discussion on SEL control OGIC equation setting 52A.) 6-16 Close and Reclose Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 235 If the reset timer is actively timing, RSTMN asserts to logical 1. If the reset timer is not timing, RSTMN deasserts to logical 0. See Block Reset Timing Setting (79BRS) later in this subsection. Date Code 20010625 Close and Reclose Logic 6-17 SEL-311L Instruction Manual...
Page 236: Reclosing Relay Shot Counter
Control OGIC Equation Setting Setting Definition 79RI TRIP + TRIP 87 Reclose Initiate 79RIS 52A + 79CY Reclose Initiate Supervision 79DTL !IN102 + LB3 Drive-to-Lockout 79DLS 79LO Drive-to-Last Shot 6-18 Close and Reclose Logic Date Code 20011112 SEL-311L Instruction Manual...
Page 237: Reclose Initiate And Reclose Initiate Supervision Settings (79Ri And 79Ris, Respectively)
SEL-311L Relay to successfully initiate reclosing and start timing on the first open interval. The SEL-311L Relay is not yet in the reclose cycle state (79CY = logical 0) at the instant of the first trip.
Page 238 If a 52b breaker auxiliary contact is connected to input IN101 (52A = !IN101), the reclose initiate setting (79RI) remains the same. 2. If no reclose initiate supervision is desired, make the following setting: 79RIS = 1 (numeral 1) 6-20 Close and Reclose Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 239: Drive-To-Lockout And Drive-To-Last Shot Settings (79Dtl And 79Dls, Respectively)
Additional Settings Example in the preceding setting 79RI [reclose initiation] discussion). Then the drive-to-lockout condition overlaps reclose initiation and the SEL-311L Relay stays in lockout after the breaker trips open. When 79DLS = logical 1, the reclosing relay goes to the last shot, if the shot counter is not at a shot value greater than or equal to the calculated last shot (see Reclosing Relay Shot Counter earlier in this subsection).
Page 240 To drive the relay to the Lockout State for fault current above a certain level when tripping (e.g., level of phase instantaneous overcurrent element 50P3), make settings similar to the following: 79DTL = (TRIP + TRIP87) * 50P3 + ... 6-22 Close and Reclose Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 241: Skip Shot And Stall Open Interval Timing Settings (79Skp And 79Stl, Respectively)
Settings Example The skip shot function is not enabled in the example settings: 79SKP (numeral 0) The stall open interval timing setting is: 79STL = TRIP + TRIP87 Date Code 20010625 Close and Reclose Logic 6-23 SEL-311L Instruction Manual...
Page 242 Refer to Figure 6.4 and accompanying setting example, showing an application for setting 79STL. Other Settings Considerations If no special skip shot or stall open interval timing conditions are desired, make the following settings: 79SKP (numeral 0) 79STL (numeral 0) 6-24 Close and Reclose Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 243: Block Reset Timing Setting (79Brs)
If the block reset timing setting is: 79BRS = 51P + 51G then reset timing is blocked if time-overcurrent pickup 51P or 51G is picked up, regardless of the reclosing relay state. Date Code 20010625 Close and Reclose Logic 6-25 SEL-311L Instruction Manual...
Page 244: Sequence Coordination Setting (79Seq)
(e.g., line recloser—see Figure 6.7) has operated to clear a fault. Incrementing the shot counter keeps the SEL-311L Relay “in step” with the downstream device, as is shown in the following Additional Settings Example 1 and Additional Settings Example 2.
Page 245 The slow curve is allowed to operate after two fast curve operations because the fast curves are then inoperative for tripping. The SEL-311L Relay instantaneous/definite time- overcurrent element T50PT is coordinated with the line recloser fast curve. The SEL-311L Relay tapped load phase time-overcurrent element T51PT is coordinated with the line recloser slow curve.
Page 246 Figure 6.8: Operation of SEL-311L Relay Shot Counter for Sequence Coordination With Line Recloser (Additional Settings Example 1) If the SEL-311L Relay is in the Reset State (79RS = logical 1) and then a permanent fault beyond the line recloser occurs (fault current I in Figure 6.7), the line recloser fast curve...
Page 247 Refer to Figure 6.9. If the SEL-311L Relay is in the Reset State (79RS = logical 0) with the shot counter reset (shot = 0; SH0 = logical 1) and then a permanent fault beyond the line recloser occurs (fault current I Figure 6.7), the line recloser fast curve operates to clear the fault.
Page 248 Figure 6.9: Operation of SEL-311L Relay Shot Counter for Sequence Coordination With Line Recloser (Additional Settings Example 2) The line recloser continues to operate for the permanent fault beyond it, but the SEL-311L Relay shot counter does not continue to increment. Sequence coordination setting 79SEQ is effectively disabled by the shot counter incrementing from shot = 0 to shot = 1.
Page 249 Is Changed ........................7-32 Output Contacts .......................... 7-33 Operation of Output Contacts..................... 7-33 High-Speed 87L Tripping—Example 1 ................7-37 High-Speed 87L Tripping with Backup Protection Tripping—Example 2 ....... 7-37 Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic SEL-311L Instruction Manual...
Page 250 Figure 7.15: Time Line for Reset of Latch Bit LT2 After Active Setting Group Change ..... 7-18 Figure 7.16: Latch Control Switch (With Time Delay Feedback) Controlled by a Single Input to Enable/Disable Reclosing.................... 7-19 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 251 Figure 7.30: Typical Two-Terminal Application With Tapped Load ............ 7-41 Figure 7.31: Traditional Panel Light Installations.................. 7-43 Figure 7.32: Rotating Default Display Replaces Traditional Panel Light Installations ......7-44 Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic SEL-311L Instruction Manual...
Page 253: Inputs, Outputs, Timers, And Other Control Logic
PTOISOLATED NPUTS Figure 7.1 shows the Relay Word bits that correspond to optoisolated inputs for the SEL-311L Relay. The figure shows examples of energized and deenergized optoisolated inputs and corresponding Relay Word bit states. To assert an input, apply rated control voltage to the appropriate terminal pair (see Figure 1.4, and Figure 2.2 through Figure 2.5).
Page 254: Input Debounce Timers
The relay updates Relay Word bits IN101 through IN106 every 1/4-cycle. If more than 1 cycle of debounce is needed, use a SEL control equation variable timer (see OGIC Figure 7.23 and Figure 7.24). Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 255: Input Functions
If a 52b circuit breaker auxiliary contact is connected to input IN101, the setting is changed to: 52A = !IN101 [!IN101 = NOT(IN101)] See Close Logic in Section 6: Close and Reclose Logic for more information on SEL OGIC control equation setting 52A. Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic SEL-311L Instruction Manual...
Page 256 OGIC setting 79DTL. The pickup/dropout timer for input IN102 (IN102D) in this example might be set at: IN102D = 1.00 cycle to provide input energization/deenergization debounce. Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 257: Local Control Switches
LB16. Use these local bits in SEL control equations. For a given local control OGIC switch, the local control switch positions are enabled by making corresponding label settings. Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic SEL-311L Instruction Manual...
Page 258: Local Control Switch Types
The local bit LBn is maintained in the OFF (LBn = logical 0) position and pulses to the MOMENTARY (LBn = logical 1) position for one processing interval (1/4 cycle). Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 259 Figure 7.6: Local Control Switch Configured as an ON/OFF/MOMENTARY Switch Table 7.2: Correspondence Between Local Control Switch Types and Required Label Settings Local Switch Type Label NLBn Label CLBn Label SLBn Label PLBn ON/OFF OFF/MOMENTARY ON/OFF/MOMENTARY Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic SEL-311L Instruction Manual...
Page 260: Settings Examples
To keep reclosing from being initiated for this trip, set local bit LB3 to drive the reclosing relay to lockout for a manual trip (see Section 6: Close and Reclose Logic): 79DTL = ... + LB3 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 261: Additional Local Control Switch Application Ideas
This feature makes the local bit feature behave the same as a traditional installation with panel-mounted control switches. If power is lost to the panel, the front-panel control switch positions remain unchanged. Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic SEL-311L Instruction Manual...
Page 262: Remote Control Switches
The outputs of the remote control switches in Figure 7.9 are Relay Word bits RBn (n = 1 to 16), called remote bits. Use these remote bits in SEL control equations. OGIC 7-10 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 263: Remote Bit Application Ideas
The latch control switch feature of this relay replaces latching relays. Traditional latching relays maintain their output contact state when set. The SEL-311L Relay latch bit retains memory even when control power is lost. If the latch bit is set to a programmable output contact and control power is lost, the state of the latch bit is stored in nonvolatile memory but the output contact will go to its deenergized state.
Page 264 Figure 7.10: Traditional Latching Relay The sixteen (16) latch control switches in the SEL-311L Relay provide latching relay type functions. Figure 7.11: Latch Control Switches Drive Latch Bits LT1 Through LT16 The output of the latch control switch in Figure 7.11 is a Relay Word bit LTn (n = 1 through 16), called a latch bit.
Page 265: Latch Control Switch Application Ideas
Relay. Reclosing Relay Enable/Disable Setting Example Use a latch control switch to enable/disable the reclosing relay in the SEL-311L Relay. In this example, a SCADA contact is connected to optoisolated input IN104. Each pulse of the SCADA contact changes the state of the reclosing relay. The SCADA contact is not maintained, just pulsed to enable/disable the reclosing relay.
Page 266 SET1 = /IN104 * !LT1 = /IN104 * NOT(LT1) = /IN104 * NOT(logical 1) = /IN104 * (logical 0) = logical 0 RST1 = /IN104 * LT1 = /IN104 * (logical 1) = /IN104 = rising edge of input IN104 7-14 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 267 0 again. Thus each individual assertion of input IN104 (Pulse 1, Pulse 2, Pulse 3, and Pulse 4 in Figure 7.14) changes the state of the latch control switch just once. Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-15 SEL-311L Instruction Manual...
Page 268 Section 10: Line Current Differential Communications and Serial Port Communications and Commands for more information on remote bits. These are just a few control logic examples—many variations are possible. 7-16 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 269: Latch Control Switch States Retained
For example, when setting Group 4 becomes the active setting group, latch bit LT2 should be reset. Make the following SEL control equation settings in setting Group 4: OGIC SV7 = SG4 RST2 = !SV7T + ... [= NOT(SV7T) + ...] Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-17 SEL-311L Instruction Manual...
Page 270: Note: Make Latch Control Switch Settings With Care
Another variation to the example application in Figure 7.12 through Figure 7.14 that adds more security is a timer with pickup/dropout times set the same (see Figure 7.16 and Figure 7.17). 7-18 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 271 Figure 7.16: Latch Control Switch (With Time Delay Feedback) Controlled by a Single Input to Enable/Disable Reclosing Figure 7.17: Latch Control Switch (With Time Delay Feedback) Operation Time Line Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-19 SEL-311L Instruction Manual...
Page 272: Active Setting Group Indication
SS1 through SS6 have priority over the serial port GROUP OGIC command and the front-panel GROUP pushbutton in selecting the active setting group. 7-20 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 273: Operation Of Sel Ogic
See Section 10: Line Current Differential Communications and Serial Port Communications and Commands for more information on the serial port GROUP command. See Section 11: Front-Panel Interface for more information on the front-panel GROUP pushbutton. Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-21 SEL-311L Instruction Manual...
Page 274: Relay Disabled Momentarily During Active Setting Group Change
OGIC Active Setting Group Switching Example 1 Use a single optoisolated input to switch between two setting groups in the SEL-311L Relay. In this example, optoisolated input IN105 on the relay is connected to a SCADA contact in Figure 7.18. Each pulse of the SCADA contact changes the active setting group from one setting group (e.g., setting Group 1) to another (e.g., setting Group 4).
Page 275 SCADA contact (and subsequent assertion of input IN105). The functions of the SEL control equations in Table 7.5 are explained in the following example. OGIC Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-23 SEL-311L Instruction Manual...
Page 276 Group 1 after qualifying time setting TGR (perhaps set at a cycle or so to qualify the assertion of setting SS1). Optoisolated input IN105 also has its own built-in debounce timer, IN105D (see Figure 7.1). 7-24 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 277: Active Setting Group Switching Example 2
Table 7.6: Active Setting Group Switching Input Logic Input States Active IN103 IN102 IN101 Setting Group Remote Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-25 SEL-311L Instruction Manual...
Page 278 The SEL-311L Relay can be programmed to operate similarly. Use three optoisolated inputs to switch between the six setting groups in the SEL-311L Relay. In this example, optoisolated inputs IN101, IN102, and IN103 on the relay are connected to a rotating selector switch in Figure 7.21.
Page 279 With settings SS1 through SS6 all at logical 0, the serial port GROUP command or the front- panel GROUP pushbutton can be used to switch the active setting group from Group 5, in this example, to another desired setting group. Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-27 SEL-311L Instruction Manual...
Page 280: Active Setting Group Retained
If the individual settings change causes a change in one or more SEL control equation OGIC settings SS1 through SS6, the active setting group can be changed, subject to the newly enabled SS1 through SS6 settings. 7-28 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 281: Note: Make Active Setting Group Switching Settings With Care
These timer setting ranges apply to both pickup and dropout times (SVnPU and SVnDO, n = 1 through 16). Figure 7.23: SEL Control Equation Variables/Timers SV1/SV1T Through SV6/SV6T OGIC Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-29 SEL-311L Instruction Manual...
Page 282: Settings Example
SV1PU is set to the breaker failure time (SV1PU = 12 cycles). Timer dropout setting SV1DO is set for a 2-cycle dropout (SV1DO = 2 cycles). The output of the timer (Relay Word bit SV1T) operates output contact OUT103. OUT103 = SV1T 7-30 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 283: Additional Settings Example 1
(output contact OUT102) closed for extra time if needed after the breaker failure logic unlatches (fault detectors 50P1 and 50G1 dropout). Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-31 SEL-311L Instruction Manual...
Page 284: Additional Settings Example 2
0 (assuming input IN101 is not asserted). Relay Word bit SV7T is also reset to logical 0, and timer settings SV7PU and SV7DO load up again. 7-32 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 285: Output Contacts
ONTACTS Operation of Output Contacts The SEL-311L Relay contains two types of output contacts. The backup protection hardware controls contacts OUT101 through OUT107 independent of the line current differential hardware. Use outputs OUT101 through OUT107 for backup protection tripping, closing, and for control applications.
Page 286 Figure 7.26: Logic Flow for Example Output Contact Operation High-Speed Output Contacts OUT201 Through OUT206 The SEL-311L Relay contains six special high-speed contacts, OUT201 through OUT206, intended for use as trip contacts by the line current differential protection. These contacts close less than 10 microseconds after their control coil is energized via setting EHST.
Page 287 Table 7.8 above. The examples shown below use Relay Word bits TRIP and TRIP87. See Section 5: Trip and Target Logic for more information about how Relay Word bits TRIP and TRIP87 are formed. Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-35 SEL-311L Instruction Manual...
Page 288 Figure 7.27: Logic Flow for Example Output Contact Operation—OUT201–OUT206 7-36 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 289: High-Speed 87L Tripping-Example 1
For example, to add backup protection and manual tripping to the previous example, make SEL control equation settings OGIC OUT201 = TRIP OUT202 = TRIP Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-37 SEL-311L Instruction Manual...
Page 290 Connect contact OUT101 in parallel with OUT201, and OUT102 in parallel with OUT202 as shown in Figure 7.29. Given the settings discussed above and the connections shown in Figure 7.29, the SEL-311L Relay responds to hardware problems in the following ways: Problem: 87L communications channel problem.
Page 291 If the fault is still present, then delay line current differential trips to give the tapped load fuse a chance to isolate the fault. This scheme is commonly referred to as fuse-saving. The SEL-311L Relay can accomplish this. Make setting...
Page 292 OUT102 = TRIP See Settings Example: 230 kV Transmission Line With Tapped Load in Section 9: Setting the Relay for more information regarding coordination with tapped loads. 7-40 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 293 For example, a 125 V contact input on an SEL-311L Relay does not assert below half the nominal dc control voltage. The input draws 4 mA at nominal voltage, so R...
Page 294 SCADA contacts, etc. They indicate such conditions as: circuit breaker open/closed reclosing relay enabled/disabled 7-42 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 295 Traditional Indicating Panel Lights Replaced with Rotating Default Display The indicating panel lights are not needed if the rotating default display feature in the SEL-311L Relay is used. Figure 7.32 shows the elimination of the indicating panel lights by using the rotating default display.
Page 296 Figure 7.32: Rotating Default Display Replaces Traditional Panel Light Installations There are sixteen (16) of these default displays available in the SEL-311L Relay. Each default display has two complementary screens (e.g., BREAKER CLOSED and BREAKER OPEN) available. General Operation of Rotating Default Display Settings...
Page 297 Circuit Breaker Closed In Figure 7.32, optoisolated input IN101 is energized when the 52a circuit breaker auxiliary contact is closed, resulting in: DP2 = IN101 = logical 1 Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-45 SEL-311L Instruction Manual...
Page 298 Circuit Breaker Closed In Figure 7.32, optoisolated input IN101 is energized when the 52a circuit breaker auxiliary contact is closed, resulting in: DP2 = IN101 = logical 1 7-46 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 299 0 (logical 0) or 1 (logical 1) and the corresponding text setting. For example, if an SEL-311L Relay is protecting a 230 kV transmission line, labeled “Line 1204,” the line name can be continually displayed with the following settings...
Page 300 This results in the display of corresponding text setting DP1_0 on the front-panel display: Á $&Á7BR45E87 Á Now the active setting group is switched from setting Group 1 to 4. 7-48 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625 SEL-311L Instruction Manual...
Page 301 See Figure 5.20 and accompanying text in Section 5: Trip and Target Logic for an example of resetting a rotating default display with the TARGET RESET pushbutton. Date Code 20010625 Inputs, Outputs, Timers, and Other Control Logic 7-49 SEL-311L Instruction Manual...
Page 303 Table 8.1: Breaker Maintenance Information for an Example Circuit Breaker........8-2 Table 8.2: Breaker Monitor Settings and Settings Ranges............... 8-4 Table 8.3: Demand Meter Settings and Settings Range................. 8-26 Date Code 20010625 Breaker Monitor and Metering Functions SEL-311L Instruction Manual...
Page 304 FIGURES Figure 8.1: Plotted Breaker Maintenance Points for an Example Circuit Breaker ........ 8-3 Figure 8.2: SEL-311L Relay Breaker Maintenance Curve for an Example Circuit Breaker....8-5 ® Figure 8.3: Operation of SEL Control Equation Breaker Monitor Initiation Setting ....8-6 OGIC Figure 8.4: Breaker Monitor Accumulates 10 Percent Wear ..............
Page 305: Breaker Monitor And Metering Functions
This section explains these functions in detail. REAKER ONITOR The breaker monitor in the SEL-311L Relay helps in scheduling circuit breaker maintenance. The breaker monitor is enabled with the enable setting: EBMON = Y The breaker monitor settings in Table 8.2 are available via the SET G and SET L commands (see Table 9.1 in Section 9: Setting the Relay and also the Settings Sheet at the end of Section...
Page 306 The breaker maintenance information in Table 8.1 is plotted in Figure 8.1. Connect the plotted points in Figure 8.1 for a breaker maintenance curve. To estimate this breaker maintenance curve in the SEL-311L Relay breaker monitor, three set points are entered: Set Point 1 maximum number of close/open operations with corresponding current interruption level.
Page 307 Figure 8.1: Plotted Breaker Maintenance Points for an Example Circuit Breaker Date Code 20010625 Breaker Monitor and Metering Functions SEL-311L Instruction Manual...
Page 308: Breaker Monitor Setting Example
Each phase (A, B, and C) has its own breaker maintenance curve (like that in Figure 8.2), because the separate circuit breaker interrupting contacts for phases A, B, and C don’t necessarily interrupt the same magnitude current (depending on fault type and loading). Breaker Monitor and Metering Functions Date Code 20010625 SEL-311L Instruction Manual...
Page 309 Figure 8.2: SEL-311L Relay Breaker Maintenance Curve for an Example Circuit Breaker Date Code 20010625 Breaker Monitor and Metering Functions SEL-311L Instruction Manual...
Page 310 See Figure 8.8 and accompanying text for more information on setting BKMON. The operation of the breaker monitor maintenance curve, when new current values are read in, is explained in the following example. Breaker Monitor and Metering Functions Date Code 20010625 SEL-311L Instruction Manual...
Page 311: Breaker Monitor Operation Example
(see View or Reset Breaker Monitor Information that follows later). Current and trip counts continue to be accumulated, until reset by the BRE R command. Additionally, logic outputs assert for alarm or other control applications—see the following discussion. Date Code 20010625 Breaker Monitor and Metering Functions SEL-311L Instruction Manual...
Page 312 Figure 8.4: Breaker Monitor Accumulates 10 Percent Wear Breaker Monitor and Metering Functions Date Code 20010625 SEL-311L Instruction Manual...
Page 313 Figure 8.5: Breaker Monitor Accumulates 25 Percent Wear Date Code 20010625 Breaker Monitor and Metering Functions SEL-311L Instruction Manual...
Page 314 Figure 8.6: Breaker Monitor Accumulates 50 Percent Wear 8-10 Breaker Monitor and Metering Functions Date Code 20010625 SEL-311L Instruction Manual...
Page 315 Figure 8.7: Breaker Monitor Accumulates 100 Percent Wear Date Code 20010625 Breaker Monitor and Metering Functions 8-11 SEL-311L Instruction Manual...
Page 316: Breaker Monitor Output
Relay Word bit BCWA asserts (BCWA = logical 1). Execution of the BRE R command resets the wear levels for all three phases back to 0 percent and consequently causes Relay Word bit BCWA to deassert (BCWA = logical 0). 8-12 Breaker Monitor and Metering Functions Date Code 20010625 SEL-311L Instruction Manual...
Page 317: Determination Of Relay-Initiated Trips And Externally Initiated Trips
Note that optoisolated input IN106 monitors the trip bus. If the trip bus is energized by output contact OUT201, an external control switch, or some other external trip, then IN106 is asserted. Date Code 20010625 Breaker Monitor and Metering Functions 8-13 SEL-311L Instruction Manual...
Page 318 OGIC BKMON = IN106 then the SEL-311L Relay breaker monitor sees all trips. If output contact OUT201 asserts, energizing the trip bus, the breaker monitor will deem it a relay-initiated trip. This is because when BKMON is newly asserted (input IN106 energized), the TRIP Relay Word bit is asserted.
Page 319: Station Dc Battery Monitor
ATTERY ONITOR The station dc battery monitor in the SEL-311L Relay can alarm for under- or overvoltage dc battery conditions and give a view of how much the station dc battery voltage dips when tripping, closing, and other dc control functions take place. The monitor measures the station dc battery voltage applied to the rear-panel terminals labeled Z25 and Z26 (see Figure 1.4).
Page 320 (all output contacts deassert on total loss of power). Thus, the resultant dc voltage element at the bottom of Figure 8.10 would probably be a better choice—see following discussion. 8-16 Breaker Monitor and Metering Functions Date Code 20010625 SEL-311L Instruction Manual...
Page 321: Additional Application
For example, if the station dc batteries have a problem and the station dc battery voltage is declining, drive the reclosing relay to lockout: 79DTL = !SV4T + ... [= NOT(SV4T) + ...] Date Code 20010625 Breaker Monitor and Metering Functions 8-17 SEL-311L Instruction Manual...
Page 322: View Station Dc Battery Voltage
ER = /IN106 + ... When the trip bus is energized, any change in station dc battery voltage can be observed in column Vdc in the event report. 8-18 Breaker Monitor and Metering Functions Date Code 20010625 SEL-311L Instruction Manual...
Page 323: Operation Of Station Dc Battery Monitor When Ac Voltage Is Powering The Relay
Operation of Station DC Battery Monitor When AC Voltage Is Powering the Relay If the SEL-311L Relay has a 125/250 Vac/Vdc supply, it can be powered by ac voltage (85 to 264 Vac) connected to the rear-panel terminals labeled POWER. When powering the relay with ac voltage, the dc voltage elements in Figure 8.9 see the average of the sampled ac voltage...
Page 324: Metering
13V secondary. If the A-phase voltage is 13V or less, the angles are referenced to the local A phase current. NSTANTANEOUS ETERING The instantaneous metering in SEL-311L Relay provides the quantities shown below: 01F8SÁ)8GS8Q1Á Á Á...
Page 325 The quantities reported depend on the number of terminals that comprise the line current differential scheme, number of channels connected to the relay, and the terminal configuration (2, 3 or 3R) of the SEL-311L Relay. The current magnitude and angles listed under “Local” in Figure 8.11 are always reported since they pertain to the local relay.
Page 326: Local Demand Metering
OCAL EMAND ETERING The SEL-311L Relay offers the choice between two types of demand metering, settable with the enable setting: EDEM = THM (Thermal Demand Meter) EDEM = ROL (Rolling Demand Meter) The demand metering settings (in Table 8.3) are available via the SET command (see Settings Sheet at the end of Section 9.
Page 327 Figure 8.13: Response of Thermal and Rolling Demand Meters to a Step Input (Setting DMTC = 15 Minutes) Date Code 20010625 Breaker Monitor and Metering Functions 8-23 SEL-311L Instruction Manual...
Page 328 (middle) is at 90 percent (0.9 per unit) of full applied value (1.0 per unit) after a time period equal to setting DMTC = 15 minutes, referenced to when the step current input is first applied. The SEL-311L Relay updates thermal demand values approximately every 2 seconds. Rolling Demand Meter Response (EDEM = ROL) The response of the rolling demand meter in Figure 8.13 (bottom) to the step current input (top)
Page 329 -5 to 0 minutes 1.0 per unit 0 to 5 minutes 1.0 per unit Rolling demand meter response at “Time = 5 minutes” = 1.0/3 = 0.33 per unit Date Code 20010625 Breaker Monitor and Metering Functions 8-25 SEL-311L Instruction Manual...
Page 330: Demand Meter Settings
Phase demand current pickup GDEMP Residual ground demand current pickup 0.10–3.20 A {1 A nominal} 0.50–16.0 A {5 A nominal} QDEMP Negative-sequence demand current pickup in 0.01 A steps 8-26 Breaker Monitor and Metering Functions Date Code 20010625 SEL-311L Instruction Manual...
Page 331: Demand Current Logic Output Application-Raise Pickup For Unbalance Current
GDEM to detect the residual ground (unbalance) demand current I and effectively raise the G(DEM) pickup of the residual ground time-overcurrent element 51GT. This is accomplished with the Date Code 20010625 Breaker Monitor and Metering Functions 8-27 SEL-311L Instruction Manual...
Page 332 51GTC being in the state: OGIC 51GTC = !GDEM + GDEM * 50G2 = NOT(GDEM) + GDEM * 50G2 NOT(logical 0) + (logical 0) * 50G2 = logical 1 8-28 Breaker Monitor and Metering Functions Date Code 20010625 SEL-311L Instruction Manual...
Page 333 !GDEM + GDEM * 50G2 = NOT(GDEM) + GDEM * 50G2 NOT(logical 0) + (logical 0) * 50G2 = logical 1 Thus, the residual ground time-overcurrent element 51GT operates on its standard pickup again: 51GP 1.50 A secondary Date Code 20010625 Breaker Monitor and Metering Functions 8-29 SEL-311L Instruction Manual...
Page 334: View Or Reset Demand Metering Information
See Figure 11.2 in Section 11: Front-Panel Interface. Demand Metering Updating and Storage The SEL-311L Relay updates demand values approximately every 2 seconds. The relay stores peak demand values to nonvolatile storage once per day (it overwrites the previous stored value if it is exceeded). Should the relay lose control power, it will restore the peak demand values saved by the relay at 23:50 hours on the previous day.
Page 335: Energy Metering Updating And Storage
11.2 in Section 11: Front-Panel Interface. Energy Metering Updating and Storage The SEL-311L Relay updates energy values approximately every 2 seconds. The relay stores energy values to nonvolatile storage once per day (it overwrites the previous stored value). Should the relay lose control power, it will restore the energy values saved by the relay at 23:50 hours on the previous day.
Page 336: Maximum/Minimum Metering Updating And Storage
Megawatt and megavar values are subject to the above voltage and current thresholds. vÁ The SEL-311L Relay stores maximum/minimum values to nonvolatile storage once per day (it overwrites the previous stored value if it is exceeded). Should the relay lose control power, it will restore the maximum/minimum values saved by the relay at 23:50 hours on the previous day.
Page 337 Table 9.2: Set Command Editing Keystrokes...................9-2 Table 9.3: SEL-311L Relay Word Bits.....................9-7 Table 9.4: Relay Word Bit Definitions for the SEL-311L................9-9 Table 9.6: Model Power System Data ....................9-38 Table 9.7: Primary Fault Study Data, as Seen by Terminal S (Differential Current in Parentheses)........................9-39...
Page 339 SECTION 9: SETTING THE RELAY NTRODUCTION Change or view settings with the SET and SHOWSET serial port commands and the front-panel SET pushbutton. Table 9.1 lists the serial port SET commands. Table 9.1: Serial Port SET Commands Settings Settings Command Type Description Sheets*...
Page 340 (see Table 5.1) while the relay is disabled. The relay is disabled for about 1 second. If Logic settings are changed for the active group, the relay can be disabled for up to 15 seconds. Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 341 If changes are made to the Relay or Logic settings for a setting group other than the active setting group (see Table 9.1), the relay is not disabled while it saves the new settings. The ALARM contact closes momentarily (for “b” contact, opens for an “a” contact; see Figure 7.26), but the EN LED remains on (see Table 5.1) while the new settings are saved.
Page 342 Figure 9.2: U.S. Inverse Curve: U2 Figure 9.1: U.S. Moderately Inverse Curve: Figure 9.3: U.S. Very Inverse Curve: U3 Figure 9.4: U.S. Extremely Inverse Curve: U4 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 343 Figure 9.5: U.S. Short-Time Inverse Curve: Figure 9.6: I.E.C. Class A Curve (Standard Figure 9.7: I.E.C. Class B Curve (Very Inverse): C1 Inverse): C2 Date Code 20010625 Setting the Relay SEL- - - - 311L Instruction Manual...
Page 344 0.60 0.50 0.40 0.30 6 (5) 0.20 3 (2.5) 0.10 0.05 DWG. M300G153 .5 .6 .7 .8.9 5 6 7 8 9 Multiples of Pickup Figure 9.10: I.E.C. Short-Time Inverse Curve: Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 345 TAR Command [Target] in Section 10: Line Current Differential Communications and Serial Port Communications and Commands). Rows 0 and 1 are reserved for the display of the two front-panel target LED rows. Table 9.3: SEL-311L Relay Word Bits Relay Word Bits TIME...
Page 346 Figure 2.13 and Figure 7.26 for more information on the operation of output contacts OUT101 through OUT107 and ALARM. See Figure 2.13 and Figure 7.27 for more information on the operation of output contacts OUT201 through OUT206. Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 347 Table 9.4: Relay Word Bit Definitions for the SEL-311L Primary Definition Application Relay Enabled (see Table 5.1) Target Relay Trip TIME Time Trip COMM Communications-Assisted Trip Line Current Differential Trip 50_51 Instantaneous and Time-Overcurrent Trip RCRS Recloser in Reset State...
Page 348 51GR Residual ground time-overcurrent element 51GT Testing reset (see Figure 3.48) Loss-of-potential (see Figure 4.1) Testing, Special directional control schemes ILOP Internal loss-of-potential (see Figure 4.1) Distance directional control enable 9-10 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 349 Primary Definition Application ZLOAD ZLOUT + ZLIN (see Figure 4.3) Special phase overcurrent element control ZLOUT Load encroachment “load out” element (see Figure 4.3) ZLIN Load encroachment “load in” element (see Figure 4.3) Local Bit 1 asserted (see Figure 7.3) Local control Local Bit 2 asserted (see Figure 7.3) front panel—...
Page 350 SV2 OGIC 7.25) asserted (see Figure 7.23) control equation variable timer input SV3 OGIC asserted (see Figure 7.23) control equation variable timer input SV4 OGIC asserted (see Figure 7.23) 9-12 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 351 Primary Definition Application SV1T control equation variable timer output Control OGIC SV1T asserted (see Figure 7.23) SV2T control equation variable timer output OGIC SV2T asserted (see Figure 7.23) SV3T control equation variable timer output OGIC SV3T asserted (see Figure 7.23) SV4T control equation variable timer output OGIC...
Page 352 Mho BC phase distance zone 2, instantaneous (see Figure 3.30) MCA2 Mho CA phase distance zone 2, instantaneous (see Figure 3.30) CVTBL CCVT transient blocking logic active Indication, (see Figure 4.2) Testing SOTFT Switch-onto-fault trip 9-14 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 353 Primary Definition Application MAG1 Mho ground distance A-phase, zone 1 Testing (see Figure 3.32) MBG1 Mho ground distance B-phase, zone 1 (see Figure 3.32) MCG1 Mho ground distance C-phase, zone 1 (see Figure 3.32) MAG2 Mho ground distance A-phase, zone 2 (see Figure 3.33) MBG2 Mho ground distance B-phase, zone 2...
Page 354 QDEMP (see Figure 8.15) TRIP Trip logic output asserted (see Figure 5.4) Output contact assignment 50QF Forward direction negative-sequence overcurrent Directional threshold exceeded (see Figure 4.5, Figure 4.6, and threshold Figure 4.14) 9-16 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 355 Primary Definition Application 50QR Reverse direction negative-sequence overcurrent threshold exceeded (see Figure 4.5, Figure 4.6, and Figure 4.14) 50GF Forward direction residual ground overcurrent threshold exceeded (see Figure 4.5 and Figure 4.7) 50GR Reverse direction residual ground overcurrent threshold exceeded (see Figure 4.5 and Figure 4.7) 32QF Forward directional control routed to phase-distance Directional...
Page 356 M4PT Zone 4 phase distance, time delayed (see Figure 3.39) Zone 4 mho and/or quad. distance, instantaneous (see Figure 3.34) Z4GT Zone 4 ground distance, time delayed (see Figure 3.39) 9-18 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 357 Primary Definition Application Zone 3 phase and/or ground distance, time delayed (see Figure 3.39) Zone 4 phase and/or ground distance, time delayed (see Figure 3.39) 50P2 Level 2 Phase instantaneous overcurrent element (A, B, or C) above pickup setting 50P2P; see Figure 3.42) 67P2 Level 2 torque controlled phase instantaneous...
Page 358 Channel VS voltage window element (channel VS voltage between threshold settings 25VLO and 25VHI; see Figure 3.53) Slip frequency between voltages VP and VS less than setting 25SF (see Figure 3.53) 9-20 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 359 Primary Definition Application 25A1 Synchronism check element (see Figure 3.54) 25A2 Synchronism check element (see Figure 3.54) RCSF Reclose supervision failure (asserts for 1/4 cycle; see Figure 6.2) OPTMN Open interval timer is timing (see Reclosing Relay in Section 6) RSTMN Reset timer is timing (see Reclosing Relay in Section 6)
Page 360 Out-of-step trip entering zone 5 (see Figure 3.41) OSTO Out-of-step trip leaving zone 5 (see Figure 3.41) Out-of-Step Trip Condition (see Figure 3.41) Tripping 50ABC Positive-Sequence current above threshold to enable Indication OOS logic (see Figure 3.40) 9-22 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 361 Primary Definition Application X5ABC Zone 5, out-of-step distance element, instantaneous Testing (see Figure 3.40) X6ABC Zone 6, out-of-step distance element, instantaneous (see Figure 3.40) Out-of-step block condition declaration (see Figure 3.41) OSB1 Out-of-step Block, Zone 1 (see Figure 3.41) OSB2 Out-of-step Block, Zone 2 (see Figure 3.41) OSB3 Out-of-step Block, Zone 3 (see Figure 3.41)
Page 362 Level 4 torque controlled negative-sequence instantaneous overcurrent element (derived from 50Q4; see Figure 3.46) 67Q4T Level 4 torque controlled negative-sequence definite- time overcurrent element 67Q4T timed out (derived from 67Q4; see Figure 3.46) 9-24 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 363 Primary Definition Application Negative-sequence instantaneous overvoltage element (negative-sequence voltage above pickup setting 59QP; see Figure 3.51) 59V1 Positive-sequence instantaneous overvoltage element (positive-sequence voltage above pickup setting 59V1P; see Figure 3.51) Negative-sequence current above pickup setting Testing, Control 51QP for negative-sequence time-overcurrent element 51QT (see Figure 3.49) 51QT Negative-sequence time-overcurrent element 51QT...
Page 364 BC phase-to-phase instantaneous overvoltage element (BC phase-to-phase voltage above pickup setting 59PP; see Figure 3.51) 59CA CA phase-to-phase instantaneous overvoltage element (CA phase-to-phase voltage above pickup setting 59PP; see Figure 3.51) 9-26 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 365 Primary Definition Application 201LOG control equation OUT20n evaluates to Testing OGIC Logical 1 (see Figure 7.27) control equation OUT20n evaluates to OGIC 202LOG Logical 1 (see Figure 7.27) control equation OUT20n evaluates to OGIC 203LOG Logical 1 (see Figure 7.27) control equation OUT20n evaluates to OGIC 204LOG...
Page 366 TMB5B Channel B, transmit bit 5 TMB4B Channel B, transmit bit 4 TMB3B Channel B, transmit bit 3 TMB2B Channel B, transmit bit 2 TMB1B Channel B, transmit bit 1 9-28 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 367 Primary Definition Application LBOKB Channel B, received M data OK in Testing, IRRORED loopback mode Indication CBADB Channel B, channel unavailability over threshold RBADB Channel B, outage duration over threshold ROKB Channel B, received M data OK IRRORED LBOKA Channel A, received M data OK in IRRORED loopback mode...
Page 368 BG fault type declaration FTCG CG fault type declaration FTAB AB fault type declaration FTBC BC fault type declaration FTCA CA fault type declaration FTSE Fault Type selection logic enabled 9-30 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 369 Primary Definition Application ORed combination of 87LA, 87LB, 87LC, 87L2, and Testing, Control 87LG (see Figure 3.17) 87LA A-Phase differential trip output (see Figure 3.17) 87LB B-Phase differential trip output (see Figure 3.17) 87LC C-Phase differential trip output (see Figure 3.17) 87L2 Negative-sequence differential trip output (see Figure 3.18)
Page 370 87LGE Zero-sequence differential calculation enable (see Figure 3.19) R87LG Zero-sequence restrain region detection output (see Figure 3.19) B87LG Extended 87LG block (see Figure 3.19) PQ87LG Protection quality 87LG alarm Alarming 9-32 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 371 Primary Definition Application T51GT Tapped load residual time-overcurrent element Tripping T51GT timed out (see Figure 3.24) T50G Tapped load residual instantaneous overcurrent element above pickup setting T50GP (see Figure 3.21) T50GT Delayed definite-time residual overcurrent element timed out (see Figure 3.21) RDTY Differential Channel Y receive direct trip (see Figure 5.1)
Page 372 (see Figure 3.17) 50RC Remote C-phase overcurrent element output (see Figure 3.17) 50L2 Local 3I2 overcurrent element output (see Figure 3.18) 50R2 Remote 3I2 overcurrent element output (see Figure 3.18) 9-34 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 373 Identifier Labels The SEL-311L Relay has two identifier labels: the Relay Identifier (RID) and the Terminal Identifier (TID). The Relay Identifier is typically used to identify the relay or the type of protection scheme. Typical terminal identifiers include an abbreviation of the substation name and line terminal.
Page 374 Hence, the enable settings are used to limit the number of settings that need to be made. Other System Parameters The global settings NFREQ and PHROT allow you to configure the SEL-311L Relay to your specific system. Set NFREQ equal to your nominal power system frequency, either 50 Hz or 60 Hz.
Page 375 Use the SEL-311L Relay to protect a transmission line with transformer tapped load. Figure 9.11 shows a 230 kV transmission line with SEL-311L Relay protection at Stations S and R. A tap midway between Stations S and R supplies power to a large industrial load. This example explains the calculation of settings for the SEL-311L Relay at Station S that protects the 230 kV circuit between substations S, R, and the transformer bank at bus T.
Page 376 Transformer rating 230 kV delta / 13.8 kV wye (each) 20 / 27 /33 MVA 211.6 Ω primary (8%, 20 MVA, 25.39 Ω secondary Transformer impedance 230 kV) Source S impedances 9-38 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 377 Parameter Primary Secondary 10 Ω ∠87° primary 1.20 Ω ∠87° secondary Z1S = Z0S Source R impedances 35 Ω ∠87° primary 4.20 Ω ∠87° secondary Z1R = Z0R PTR (potential transformer ratio) 230 kV : 115 V = 2000 : 1 CTR (current transformer ratio) 1200 : 5 = 240 : 1 CT burden class at station S and R...
Page 378 22.6 306.0 64.4 (436.9 -54.4) (609.8 157.3) (330.9 21.2) As seen by Station S, faults at Station T with Station R open produce approximately 90% of Station R fault current. 9-40 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 379 CTR at terminal connected to Channel X (1–6000) CTR_X = 240 Enter the current transformer ratio used in the SEL-311L Relay at Station R. Minimum Difference Current Enable Level Settings (E87L = 2 or 3) Phase 87L (OFF, 1.00–10.00 A secondary) 87LPP = 1.00...
Page 380 Tapped-Load Coordinating Overcurrent Element Settings (If ETAP = Y) Phase element (Y, N) ETP = Y Residual ground element (Y, N) ETG = Y Negative-sequence element (Y, N) ETQ = N 9-42 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 381 Tapped-Load Phase Time-Overcurrent Element Settings (If ETP = Y) Pickup (OFF, 0.50–16.00 A secondary) T51PP = 3.33 Set the time overcurrent phase element (T51PP) to coordinate with tap overcurrent protection. Tapped-load overcurrent elements use differential current, which is the vector sum of Station S and Station R secondary current (e.g., IA = IA ).
Page 382 (V secondary / T51GP) • (CTR / PTR) = (66.4 / 2.0 )• (2000 / 240) = 276.7 Ohms Primary Curve (U1–U5; C1–C5) T51GC = U3 Time dial (0.50–15.00 for curves U1–U5; 0.05–1.00 for curves C1–C5) T51GTD = 1.00 Electromechanical reset delay (Y, N) T51GRS = Y 9-44 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 383 Tapped-Load Residual Ground Inst./Def.-Time Overcurrent Element Settings Pickup (OFF, 0.50–16.00 A secondary) T50GP = 7.22 Set the tapped-load ground overcurrent element with differential current. Since the transformers are connected delta-wye, and T51G is a differential element, T51G will only assert for faults on the transmission line.
Page 384 Voltage elements are not enabled in this example. Set EVOLT = N. Synchronism check (Y, N) (see Figures 3.53 and 3.54) E25 = N Synchronism check elements are not enabled in this example. Set E25 = N. 9-46 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 385 Frequency Elements (N, 1–6) E81 = N Frequency elements are not enabled in this example. Set E81 = N. Fault location (Y, N) (see Table 12.1 and Fault Location in Section 12) EFLOC = Y Fault location is enabled in this example. Set EFLOC = Y. Loss-of-potential (Y, Y1, N) (see Figure 4.1) ELOP = Y1 Set ELOP = Y1 to disable all voltage polarized directional overcurrent elements and distance...
Page 386 This element will be used to torque control the phase time overcurrent element 51GT. Zone 3 (OFF, 0.05–64.00 Ω secondary {5 A nom.}; Z3MG = 1.76 0.25–320.00 Ω secondary {1 A nom.}) (see Figure 3.34) Set Z3MG to the same values as Z3P. 9-48 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 387 Quadrilateral and Mho Ground Distance Fault Detector Settings Zone 1 phase current FD (0.50–100.00 Α secondary {5 A nom.}; 50L1 = 0.5 0.10–20.00 Α secondary {1 A nom.}) (see Figures 3.32 and 3.35) Zone 1 residual current FD (0.50–100.00 Α secondary {5 A nom.}; 50GZ1 = 0.5 0.10–20.00 Α...
Page 388 Set 51GP to the same value as T51GP. Set 51GC to the same curve as T51GC. Set 51GTD so that the maximum residual fault current seen by Station S for a fault at Station R (3538.9 A) asserts 9-50 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 389 51GT in the Zone 3 delay time of 20 cycles. 1 • 10 3538.9 Max. Regional Current at Station S 51GT for a Fault at Station R 0.01 1 • 10 1 • 10 Primary Amps 51G Overcurrent Protection M311L141 Z2 Time Delay Zone/Level 3 Directional Control Zone/Level 3 direction: Forward, Reverse (F, R)
Page 390 R, and T. T50G provides instantaneous tripping between Stations S, R, and T. T51PT and T51GT provide time delayed tripping between Stations S, R, and T. Direct transfer trip conditions DTT = 0 Unlatch trip conditions ULTR = !(50L + 51G) 9-52 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 391 Close Logic Equations (See Figure 6.1) Circuit breaker status (used in Figure 5.5, also) 52A = IN101 Connect the circuit breaker 52a contact to IN101. See Section 2: Installation for examples of breaker status connections. Close conditions (other than automatic reclosing or CL = CC CLOSE command) Unlatch close conditions...
Page 392 Section 8) Block synchronism check elements (see Figure 3.53) BSYNCH = 0 Close bus monitor (see Figure 5.5) CLMON = 0 Breaker monitor initiation (see Figure 8.3) BKMON = 0 9-54 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 393 Enable for zero-sequence voltage-polarized and channel E32IV = 1 IP current-polarized directional elements (see Figure 4.7) 87L Transmit Bit Equations Channel X, transmit bit 1 T1X = 0 Channel X, transmit bit 2 T2X = 0 Channel Y, transmit bit 1 T1Y = 0 Channel Y, transmit bit 2 T2Y = 0...
Page 394 Refer to Relay Element Pickup Ranges and Accuracies in Section 1: Introduction and Specifications for information on 5 A nominal and 1 A nominal ordering options and how they influence overcurrent element setting ranges. 9-56 Setting the Relay Date Code 20010625 SEL-311L Instruction Manual...
Page 395 ETTINGS HEET Page 1 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Identifier Labels and Configuration Settings (See Settings Explanations in Section 9 ) Relay Identifier (30 characters) RID = Terminal Identifier (30 characters)
Page 396 ETTINGS HEET Page 2 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Tapped-Load Coordinating Overcurrent Element Settings (If ETAP = Y) Phase element (Y, N) ETP = Residual ground element (Y, N) ETG =...
Page 397 ETTINGS HEET Page 3 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Line Parameter Settings (See Settings Explanations in Section 9 ) Positive-sequence line impedance magnitude Z1MAG = (0.05–255.00 W secondary {5 A nom.};...
Page 398 ETTINGS HEET Page 4 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Communications-assisted trip scheme (N, DCB, POTT, DCUB1, DCUB2) ECOMM = (see Communications-Assisted Trip Logic—General Overview in Section 5) Reclosures (N, 1–4) (see Reclosing Relay in Section 6) E79 = Zone 1 extension (Y, N) (see Figure 3.38)
Page 399 ETTINGS HEET Page 5 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Mho Ground Distance Elements (Number of mho ground distance element settings dependent on preceding enable setting E21MG = 1–4.) Zone 1 (OFF, 0.05–64.00 W secondary {5 A nom.};...
Page 400 ETTINGS HEET Page 6 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Quadrilateral and Mho Ground Distance Fault Detector Settings (Number of quadrilateral and mho ground distance element settings dependent on the larger of preceding enable settings E21MG = 1–4 or E21XG = 1–4.)
Page 401 ETTINGS HEET Page 7 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Quadrilateral and Mho Ground Distance Element Time Delays (See Figure 3.39) (Number of time delay element settings dependent on the larger of preceding enable settings E21MG = 1–4 or E21XG = 1–4.)
Page 402 ETTINGS HEET Page 8 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Residual Ground Inst./Def.-Time Overcurrent Elements (See Figure 3.45) (Number of residual ground element pickup settings dependent on preceding enable setting E50G = 1–4.) Level 1 (OFF, 0.25–100.00 A secondary {5 A nom.};...
Page 403 ETTINGS HEET Page 9 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Phase Time-Overcurrent Element (See Figure 3.47) (Make the following settings if preceding enable setting E51P = Y.) Pickup (OFF, 0.50–16.00 A secondary {5 A nom.};...
Page 404 ETTINGS HEET Page 10 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Zone 6 resistance—Right (0.05 to 70.00 W secondary {5 A nom.}; R1R6 = 0.25 to 350.00 W secondary {1 A nom.}) Zone 5 resistance—Right (0.05 to 70.00 W secondary {5 A nom.};...
Page 405 ETTINGS HEET Page 11 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Directional Elements (See Directional Control Settings in Section 4) (Make setting ORDER if preceding enable setting E32 = Y or AUTO.)
Page 406 ETTINGS HEET Page 12 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Phase-to-phase undervoltage pickup (OFF, 0.0–260.0 V secondary) 27PP = Phase-to-phase overvoltage pickup (OFF, 0.0–260.0 V secondary) 59PP = Synchronism Check Elements (See Figures 3.53 and 3.54) (Make the following settings if preceding enable setting E25 = Y.)
Page 407 ETTINGS HEET Page 13 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Reset time from lockout (0.00–999999.00 cycles in 0.25-cycle steps) 79RSLD = Reclose supervision time limit (OFF, 0.00–999999.00 cycles in 0.25-cycle 79CLSD = steps) (set 79CLSD = 0.00 for most applications;...
Page 408 ETTINGS HEET Page 14 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Zone 1 Extension Scheme Settings (See Figure 3.38) (Make the following settings if preceding enable setting EZ1EXT = Y.) Zone 1 extension delay time (0.00–16000.00 cycles) Z1EXTD = Zone 1 distance multiplier (1.00–4.00)
Page 409 ETTINGS HEET Page 15 SEL-311L R (APP = 311L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL SV6 Dropout Time (0.00–999999.00 cycles in 0.25-cycle steps) SV6DO = SV7 Pickup Time (0.00–16000.00 cycles in 0.25-cycle steps) SV7PU = SV7 Dropout Time (0.00–16000.00 cycles in 0.25-cycle steps) SV7DO = SV8 Pickup Time (0.00–16000.00 cycles in 0.25-cycle steps)
Page 410 ETTINGS HEET Page 16 SEL-311L R (APP = 311L) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND control equation settings consist of Relay Word bits (see Tables 9.3 and 9.4) and OGIC control equation operators * (AND), + (OR), ! (NOT), / (rising edge), \ (falling edge), OGIC and ( ) (parentheses).
Page 411 ETTINGS HEET Page 17 SEL-311L R (APP = 311L) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Latch Bits Set/Reset Equations (See Figure 7.11) Set Latch Bit LT1 SET1 = Reset Latch Bit LT1 RST1 =...
Page 412 ETTINGS HEET Page 18 SEL-311L R (APP = 311L) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Torque Control Equations for Inst./Def.-Time Overcurrent Elements [Note: torque control equation settings cannot be set directly to logical 0] Level 1 phase (see Figure 3.42)
Page 413 ETTINGS HEET Page 19 SEL-311L R (APP = 311L) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Control Equation Variable Timer Input Equations (See Figures 7.23 and 7.24) OGIC control equation Variable SV1 SV1 = OGIC...
Page 414 ETTINGS HEET Page 20 SEL-311L R (APP = 311L) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Display Point Equations (See Rotating Default Display in Sections 7 and 11 ) Display Point DP1 DP1 = Display Point DP2...
Page 415 ETTINGS HEET Page 21 SEL-311L R (APP = 311L) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND ™ Transmit Equations (See Appendix I ) IRRORED Channel A, transmit bit 1 TMB1A = Channel A, transmit bit 2...
Page 416 ETTINGS HEET Page 22 SEL-311L R (APP = 311L) FOR THE ELAY Date SET G LOBAL ETTINGS ERIAL OMMAND RONT ANEL Settings Group Change Delay (See Multiple Setting Groups in Section 7 ) Group change delay (0.00–16000.00 cycles in 0.25-cycle steps)
Page 417 ETTINGS HEET Page 23 SEL-311L R (APP = 311L) FOR THE ELAY Date SET G LOBAL ETTINGS ERIAL OMMAND RONT ANEL Breaker Monitor Settings (See Breaker Monitor in Section 8 ) Breaker monitor enable (Y, N) EBMON = (Make the following settings if preceding enable setting EBMON = Y) Close/Open set point 1—max.
Page 418 ETTINGS HEET Page 24 SEL-311L R (APP = 311L) FOR THE ELAY Date SET R) EQUENTIAL VENTS ECORDER ETTINGS ERIAL OMMAND Sequential Events Recorder settings are comprised of three trigger lists. Each trigger list can include up to 24 Relay Word bits delimited by commas. Enter NA to remove a list of these Relay Word bit settings.
Page 419 ETTINGS HEET Page 25 SEL-311L R (APP = 311L) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Enter the following characters: 0–9, A-Z, #, &, @, -, /, ., space for each text label setting, subject to the specified character limit. Enter NA to null a label.
Page 420 ETTINGS HEET Page 26 SEL-311L R (APP = 311L) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Local Bit LB8 Name (14 characters) NLB8 = Clear Local Bit LB8 Label (7 characters) CLB8 = Set Local Bit LB8 Label (7 characters)
Page 421 ETTINGS HEET Page 27 SEL-311L R (APP = 311L) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Local Bit LB16 Name (14 characters) NLB16 = Clear Local Bit LB16 Label (7 characters) CLB16 = Set Local Bit LB16 Label (7 characters)
Page 422 ETTINGS HEET Page 28 SEL-311L R (APP = 311L) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Display if DP14 = logical 1 (16 characters) DP14_1 = Display if DP14 = logical 0 (16 characters) DP14_0 = Display if DP15 = logical 1 (16 characters)
Page 423 SEL Distributed Port Switch Protocol. Set FASTOP = Y to enable binary Fast Operate messages at the serial port. Set FASTOP = N to block binary Fast Operate messages. Refer to Appendix D for the description of the SEL-311L Relay Fast Operate commands.
Page 424 ETTINGS HEET Page 30 SEL-311L R (APP = 311L) FOR THE ELAY Date SET X SET Y HANNEL ETTINGS ERIAL OMMAND RONT ANEL 87L Channel X Configuration Settings Channel X address check (Y, N) EADDCX = If EADDCX = Y Channel X transmit address (1–16)
Page 425 Port Connector and Communications Cables................10-13 IRIG-B ..........................10-13 SEL-311L to Computer.....................10-14 SEL-311L to SEL-2020, SEL-2030, or SEL-2100............10-15 SEL-311L to SEL-DTA2 ....................10-15 SEL-311L to StarComm Modem, 5 Vdc Powered ............10-16 SEL-311L to Modem or Other DCE.................10-16 Communications Protocols.......................10-17 Hardware Protocol ......................10-17 Software Protocols ......................10-17 Serial Port Automatic Messages....................10-19...
Page 426 Table 10.5: Serial Port Automatic Messages..................10-20 Table 10.6: Serial Port Command Summary..................10-24 Table 10.7: Event Types ........................10-32 Table 10.8: SEL-311L Relay Word and Its Correspondence to TAR Command ........10-46 Table 10.9: SEL-311L Relay Control Subcommands ................10-51 FIGURES Figure 10.1: Back-to-Back EIA-422 Connection With External Clock Source ........10-3 Figure 10.2: Back-to-Back CCITT G.703 Connection ................10-4...
Page 427: Section 10: Line Current Differential
Channel Configuration Settings EIA-422 Interface The EIA-422 interface supplied in an SEL-311L Relay is isolated from the chassis to 1500 V rms. Therefore the signal common is also isolated from the chassis, preventing ground loops. To preserve that isolation, ground the cable shield only at the multiplexer. Refer to Table 2.2 for the EIA-422 cable appropriate to your application.
Page 428 Unlike other interfaces available with the SEL-311L, the EIA-422 interface can operate at either 64 kbps or 56 kbps. The SEL-311L Relay automatically adapts to either data rate. There is no data rate setting. The transmit and receive clocks must be of identical frequency. This requirement is satisfied by all commercially available multiplexer equipment.
Page 429 Refer to Table 2.2 for the G.703 cable appropriate to your application. All of those cables connect the shield at the multiplexer end only. The DB-25 connector pinout on the SEL-311L Relay and the direction of signal flow is shown in Figure 2.7.
Page 430 PC37.94 defines several troubleshooting aids, including a Yellow Alarm bit. At present, the SEL-311L Relay does not report the status of the receive Yellow Alarm bit, nor does it generate a Yellow Alarm bit. Consult the documentation provided with your multiplexer to determine when and if the multiplexer asserts the Yellow Alarm indicators.
Page 431 E87L and PCHAN). For example, if a pair of SEL-311L Relays are equipped with a 1300 nm direct-fiber interface on Channel X, and an EIA-422 interface on Channel Y, and they are connected as shown in Figure 10.3, then the...
Page 432: Types
Y. Rear panel TX/RX LEDs illuminate when the relay transmits and receives valid 87L packets from another SEL-311L Relay. In addition, several Relay Word bits per channel indicate channel health, and help determine the cause of channel problems. The collection of Relay Word bits, LEDs, and channel monitor reports collectively form the channel monitors.
Page 433 RA_X and TA_X uniquely for each SEL-311L Relay connected to the network. For direct-fiber connections, set RA_X and TA_X uniquely for each SEL-311L Relay with a fiber pair in a bundle, or for each SEL-311L Relay with a fiber pair routed through a patch panel.
Page 434 Figure 3.6 and Figure 3.7 were measured using a back-to-back connection. One-way channel delay times that exceed the automatic compensation capability of the SEL-311L Relay (35 milliseconds) can result in misoperation. Relay Word Bits CHXAL and CHYAL The bits described above are combined into a single Relay Word bit for each channel, CHXAL or CHYAL.
Page 435 DP5_1 = DP5_0 = 87L DISABLED The SEL-311L Relay front panel LCD displays the appropriate message when a problem occurs on either channel, in either direction. This alerts operators to the problem, and gives valuable assistance in troubleshooting the problem.
Page 436: Loopback, End-To-End, And Back-To-Back Testing With The Tst Command
The RX LED illuminates when the channel is enabled and receives valid packets from another SEL-311L. The RX LED extinguishes if the channel is disabled, if there are sufficient data errors to prevent the relay from recognizing the packet boundaries, if the receive data is entirely absent, or, in the case of an EIA-422 port, if the externally supplied RX clock stops.
Page 437: 87L Comm Report
87L data. Select external loopback to loop the channel anywhere outside the SEL-311L Relay. Loop the channel back at the SEL-311L Relay connector, at the multiplexer, anywhere in the network, or at the far end. Select None to perform end-to-end or back-to-back tests.
Page 438 OMMUNICATIONS AND OMMANDS In addition to the differential communication channel(s) all SEL-311L Relay models have three EIA-232 ports (one front and two rear) and one rear EIA-485 port. The ports are useful for relay settings changes, interrogation, control, and data collection.
Page 439: Irig-B
Refer to Figure 1.5 and Figure 2.2 through Figure 2.5. Note that demodulated IRIG-B time code can be input into Serial Port 1 or Serial Port 2 on any of the SEL-311L Relay models. This is easily handled by connecting Serial Port 2 of the SEL-311L Relay to an SEL-2020 with Cable C273A (see cable diagrams that follow in this section).
Page 440: Sel-311L To Computer
-IRIG-B The following cable diagrams show several types of EIA-232 serial communications cables that connect the SEL-311L Relay to other devices. SEL provides fiber-optic transceivers and cable for communications links with improved safety, noise immunity, and distance as compared to copper links.
Page 441 2 TXD GND 9 1 GND CTS 8 4 RTS 5 CTS 6 DSR 8 DCD 20 DTR SEL-311L to SEL-2020, SEL-2030, or SEL-2100 Cable C273A SEL-2020/2030 or SEL-2100 SEL-311L Relay 9-Pin Male 9-Pin Male “D” Subconnector “D” Subconnector RXD 2...
Page 442: Sel-311L To Starcomm Modem, 5 Vdc Powered
SEL-311L to StarComm Modem, 5 Vdc Powered Cable C220 StarComm Modem SEL-311L Relay 25-Pin Male 9-Pin Male “D” Subconnector “D” Subconnector GND 7 5 GND TXD (IN) 2 3 TXD DTR (IN) 20 7 RTS RXD (OUT) 3 2 RXD...
Page 443: Communications Protocols
In addition, the relay provides Distributed Network Protocol (DNP) 3.00 as an ordering option. The relay activates protocols on a per-port basis. The SEL-311L Relay supports the SEL-DTA2 Display Transducer Adapter analog transducer function with the exception of relay status...
Page 444 XOFF character so they do not overwrite the buffer. Transmission should terminate at the end of the message in progress when XOFF is received and may resume when the relay sends XON. 10-18 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 445 Distributed Network Protocol (DNP) 3.00 The relay provides Distributed Network Protocol (DNP) 3.00 slave support. DNP is an optional protocol and is described in Appendix H. Communications IRRORED The SEL-311L Relay supports M relay-to-relay communications on two ports IRRORED simultaneously. See Appendix I. ERIAL...
Page 446: Sel-Dta Protocol
Access Level 1. 5. Type 2AC <ENTER> to go to Access Level 2. The SEL-311L Relay will respond with the same password prompt that you saw for Level 1. At the password prompt, enter your existing or default Level 2 password and press <ENTER>.
Page 447 These passwords include special characters, upper and lower case letters, and numbers. They also form no recognizable names or words. The following example demonstrates how to change your SEL-311L Relay passwords. It assumes the existing passwords are “BADPAS,” “BRAKER,” and “TOOEZY” for Access Levels 1, B, and 2, respectively.
Page 448: Serial Port Access Levels
The 2AC command allows the relay to go to Access Level 2. Enter the 2AC command at the Access Level 1 prompt: =>2AC <ENTER> 10-22 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 449: Access Level B
The correspondence between the serial port commands and the front-panel pushbuttons is also given in Table 10.6. See Section 11: Front-Panel Interface for more information on the front-panel pushbuttons. Date Code 20010625 Line Current Differential Communications 10-23 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 450 Relay self-test status STATUS => Display event summary EVENTS => Display relay element status OTHER => View/change time OTHER => Trigger an event report 10-24 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 451: Access Level 2
EXAMPLE: BUS B, BREAKER 3 The definitions are: SEL-311L: This is the RID setting (the relay is shipped with the default setting RID = SEL-311L; see Identifier Labels in Section 9: Setting the Relay). EXAMPLE: BUS B, BREAKER 3: This is the TID setting (the relay is shipped with the default setting TID = EXAMPLE: BUS B, BREAKER 3;...
Page 452: Command Explanations
Assume the following conditions: Password jumper = OFF (not in place), Access Level = 0. At the Access Level 0 prompt, enter the ACC command: =ACC <ENTER> 10-26 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 453 The compressed ASCII configuration provides data for an external computer to extract data from other compressed ASCII commands. For details on this and other Compressed ASCII commands see Appendix E: Compressed ASCII Commands. Date Code 20010625 Line Current Differential Communications 10-27 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 454: Access Level 1 Commands
CHIS Command Display history in compressed ASCII format. For details on this and other Compressed ASCII commands see Appendix E: Compressed ASCII Commands. 10-28 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 455 10/05/99 18:36:09.279 10/05/9918:37:36.114 2.835 10/06/99 13:18:09.236 10/06/99 13:18:09.736 0.499 Parity error 10/07/99 11:43:35.547 10/07/99 11:43:35.637 0.089 Underrun 10/09/99 17:18:12.993 10/09/99 17:18:13.115 0.121 => Date Code 20010625 Line Current Differential Communications 10-29 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 456 Note: After setting date or time, allow at least 60 seconds before powering down the relay or the new setting may be lost. 10-30 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 457 Date Code 20010625 Line Current Differential Communications 10-31 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 458 ER PULSE event report generated by execution of the PUL (Pulse) command TRIG event report generated by execution of the TRI (Trigger) command 10-32 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 459 Under perfect ratio matching and communications, the vector sum would indicate the line charging current. The Alpha plane display shows where each phase and Date Code 20010625 Line Current Differential Communications 10-33 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 460 A,B,C Three-phase megawatts MVAR Single- and three-phase megavars A,B,C MVAR Three-phase megavars Power Factor Single- and three-phase power factor; leading or lagging A,B,C,3P 10-34 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 461 =>MET B k <ENTER> where k is an optional parameter to specify the number of times (1–32767) to repeat the meter display. If k is not specified, the meter report is displayed once. The output from an SEL-311L Relay is shown below.
Page 462 Reset Time Demand, Peak Last time the demands and peak demands were reset To view demand metering values, enter the command: =>MET D <ENTER> The output from an SEL-311L Relay is shown: =>MET D <ENTER> SEL-311L Date: 10/12/99 Time: 16:22:04.372...
Page 463 The output from an SEL-311L Relay is shown: =>MET E <ENTER> SEL-311L Date: 03/01/00 Time: 15:11:24.056 EXAMPLE: BUS B, BREAKER 3 MWhA MWhB MWhC MWh3P MVARhA MVARhB MVARhC MVARh3P 36.0 36.6 36.7 109.2 15.6 LAST RESET 02/10/00 23:31:28.864 => Reset the energy values using the MET RE command. For more information on energy metering, see Energy Metering in Section 8: Breaker Monitor and Metering Functions.
Page 464 SHO P n Show serial port settings. n specifies the port (1, 2, 3, or F); n defaults to the active port if not listed. 10-38 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 465 The SHO commands display only the enabled settings. To display all settings, including disabled/hidden settings, append an A to the SHO command (e.g., SHO 1 A). Below are sample SHOWSET commands for the SEL-311L Relay, showing all the factory default settings.
Page 466 =/B87L2 + /M2P + /Z2G + /51G + /51Q + /50P1 + /LOP FAULT =51G + 51Q + M2P + Z2G BSYNCH=0 Press RETURN to continue 10-40 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 467 T_OUT = 15 AUTO RTSCTS= N FASTOP= N => =>SHO R <ENTER> Sequential Events Recorder trigger lists: SER1 =87L,87L2,87LG,87LA,87LB,87LC,R87L2,R87LG,R87LA,R87LB,R87LC SER2 =TRIP,TRIP87,CLOSE,LOP SER3 =M1P,Z1G,M2P,Z2G,M3P,Z3G,67G2T,51GT,KEY,Z3RB,PTRX => Date Code 20010625 Line Current Differential Communications 10-41 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 468 AVAXP = 10 DBADXP= 10 TIMRX = E => =>SHO Y <ENTER> EADDCY= N RBADYP= 1 AVAYP = 10 DBADYP= 10 TIMRY = E => 10-42 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 469 (1–32767) to repeat the status display. If n is not specified, the status report is displayed once. The output of an SEL-311L Relay with wye-connected voltage inputs and no extra I/O board is shown: =>STA <ENTER>...
Page 470 Refer to Section 13: Testing, Troubleshooting, and Commissioning for self-test thresholds (in Table 13.5) and corrective actions. 10-44 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 471 COMM, SOTF, 50_51, A, B, C, G, Zone 1, Zone 2, and Zone 3. Unlatches the trip logic for testing purposes (see Figure 5.1 and Figure 5.4). Shows Relay Word Row 0. Date Code 20010625 Line Current Differential Communications 10-45 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 472 Table 10.8: SEL-311L Relay Word and Its Correspondence to TAR Command TAR 0 TRIP TIME COMM 50_51 RCRS RCLO (Front-Panel LEDs) TAR 1 ZONE1 ZONE2 ZONE3 87CH (Front-Panel FAIL LEDs) Command TAR SH1 10 is executed in the following example: =>TAR SH1 10 <ENTER>...
Page 473 => See Section 12: Standard Event Reports and SER for more information on event reports. Recall this event summary with the SUM command. Date Code 20010625 Line Current Differential Communications 10-47 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 474: Access Level B Commands
CL to assert the CLOSE Relay Word bit, which OGIC in turn asserts an output contact (e.g., OUT102 = CLOSE) to close a circuit breaker. See Figure 6.1. 10-48 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 475 GRO command. SEL control equations OGIC settings SS1 through SS6 have priority over the GRO command in active setting group control. Date Code 20010625 Line Current Differential Communications 10-49 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 476 Figure 7.26 and Figure 7.27). is the pulse duration (1–30 seconds). If y is not specified, the pulse duration defaults to 1 second. 10-50 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 477: Access Level 2 Commands
CONTROL RB5: PRB 5 <ENTER> =>> You must enter the same remote bit number in both steps in the command. If the bit numbers do not match, the relay responds “Invalid Command.” Table 10.9: SEL-311L Relay Control Subcommands Subcommand Description SRB n Set Remote Bit n (“ON”...
Page 478 Loopback will be enabled on Mirrored Bits channel A for the next 10 minutes. The RMB values will be allowed to change while loopback is enabled. Are you sure (Y/N) ? N <ENTER> Canceled. =>> 10-52 Line Current Differential Communications Date Code 20010625 and Serial Port Communications and Commands SEL-311L Instruction Manual...
Page 479 =>> PAS Command (View/Change Passwords) For details on the PAS command see Using and Changing SEL-311L Relay Passwords above. SET Command (Change Settings) The SET command allows the user to view or change the relay settings—see Table 9.1 in Section 9: Setting the Relay.
Page 481: Sel-311L Relay Command Summary
SEL-311L Relay Command Summary Access Level 0 Commands The only thing that can be done at Access level 0 is to go to Access Level 1. The screen prompt is: = Enter Access Level 1. If the main board password jumper is not in place, the relay prompts for entry of the Access Level 1 password in order to enter Access Level 1.
Page 482 Table 6.1 for more information concerning the OPE command. PUL n k Pulse output contact n (OUT101–OUT107, ALARM, OUT201–OUT212) for k (1–30) seconds. Parameter n must be specified; k defaults to 1 if not specified. Command Summary Date Code 20010625 SEL-311L Instruction Manual...
Page 483 If channel (X or Y) is specified a question string will follow to configure the channel for testing. With no channel identifier, the command will return each channel status. Displays version and configuration information. Date Code 20010625 Command Summary SEL-311L Instruction Manual...
Page 485 Figure 11.1: SEL-311L Relay Front-Panel Pushbuttons—Overview ............ 11-1 Figure 11.2: SEL-311L Relay Front-Panel Pushbuttons—Primary Functions ........11-2 Figure 11.3: SEL-311L Relay Front-Panel Pushbuttons—Primary Functions (Continued) ....11-3 Figure 11.4: SEL-311L Relay Front-Panel Pushbuttons—Secondary Functions ........11-4 Figure 11.5: Local Control Switch Configured as an ON/OFF Switch..........11-7 Figure 11.6: Local Control Switch Configured as an OFF/MOMENTARY Switch ......
Page 487: Front-Panel Interface
Sheets at the end of Section 9: Setting the Relay; the relay is shipped with FP_TO = 15 minutes). Figure 11.1: SEL-311L Relay Front-Panel Pushbuttons—Overview Primary Functions Note in Figure 11.2 and Figure 11.3 that the front-panel pushbutton primary functions correspond to serial port commands—both retrieve the same information or perform the same...
Page 488: Front-Panel Password Security
Some of the front-panel primary functions do not have serial port command equivalents. These are discussed in the following subsection Functions Unique to the Front-Panel Interface. Figure 11.2: SEL-311L Relay Front-Panel Pushbuttons—Primary Functions Front-Panel Password Security Refer to the comments at the bottom of Figure 11.3 concerning Access Level B and Access Level 2 passwords.
Page 489: Secondary Functions
Figure 11.3: SEL-311L Relay Front-Panel Pushbuttons—Primary Functions (Continued) Secondary Functions After a primary function is selected (see Figure 11.2 and Figure 11.3), the pushbuttons then revert to operating on their secondary functions (see Figure 11.4). When changing settings, use the left/right arrows to underscore a desired function. Then press the SELECT pushbutton to select the function.
Page 490 Press the CANCEL pushbutton to abort a setting change procedure and return to the previous display. Press the EXIT pushbutton to return to the default display and have the primary pushbutton functions activated again (see Figure 11.2 and Figure 11.3). Figure 11.4: SEL-311L Relay Front-Panel Pushbuttons—Secondary Functions 11-4 Front-Panel Interface...
Page 491: Functions Unique To The Front-Panel Interface
There are two set open intervals in the demonstration settings, thus two reclosures (shots) are possible in a reclose sequence. Date Code 20010625 Front-Panel Interface 11-5 SEL-311L Instruction Manual...
Page 492: Reclosing Relay Shot Counter Screen Operation
If the relay trips the breaker open again, the reclosing relay goes to the lockout state (front-panel LO LED illuminates). The reclosing relay shot counter screen still appears as: R8SÁQ86EHRTQ8R0Á Q86EHR8Á6HTGSÁ0Á 11-6 Front-Panel Interface Date Code 20010625 SEL-311L Instruction Manual...
Page 493: Local Control
Local control can emulate the switch types shown in Figure 11.5 through Figure 11.7. Figure 11.5: Local Control Switch Configured as an ON/OFF Switch Figure 11.6: Local Control Switch Configured as an OFF/MOMENTARY Switch Date Code 20010625 Front-Panel Interface 11-7 SEL-311L Instruction Manual...
Page 494: View Local Control (With Example Settings)
PLB4 = CLOSE Press the CNTRL pushbutton, and the first set local control switch displays F4GT4EÁSQBIÁÁÁ I€„t…t€y'ÁQ8STQGÁ Press the right arrow pushbutton, and scroll to the next set local control switch: 11-8 Front-Panel Interface Date Code 20010625 SEL-311L Instruction Manual...
Page 495: Operate Local Control (With Example Settings)
Press the SELECT pushbutton, and the operate option for the displayed local control switch displays: F4GT4EÁSQBIÁÁÁÁ SQBIÁ2ÁXp„ÁG€Á Scroll left with the left arrow button and then select “Yes”. The display then shows the new local control switch position: F4GT4EÁSQBIÁÁÁÁÁÁ I€„t…t€y'ÁSQBIÁ Date Code 20010625 Front-Panel Interface 11-9 SEL-311L Instruction Manual...
Page 496: Local Control State Retained When Relay Deenergized
If the reclosing switch is in the enable position (switch closed) before the power outage, it will be in the same position after the outage when power is restored. 11-10 Front-Panel Interface Date Code 20010625 SEL-311L Instruction Manual...
Page 497: Rotating Default Display
9XB)ÃH" G%! If display point labels (e.g., “CHANNEL X ALARM” and “CHANNEL Y ALARM”) are enabled for display, they also enter into the display rotation (display time = SCROLD). 9XB)ÃH" G%" Date Code 20010625 Front-Panel Interface 11-11 SEL-311L Instruction Manual...
Page 498 G%# DP2_1 = CHANNEL X ALARM DP2 = CHXAL = logical 1 DP2_0 = NA DP3_1 = CHANNEL Y ALARM DP3 = CHYAL = logical 0 DP3_0 = NA 9XB)ÃH" G%$ 11-12 Front-Panel Interface Date Code 20010625 SEL-311L Instruction Manual...
Page 499 Display point label settings are set with the SET T command or viewed with the SHO T command via the serial port (see Section 9: Setting the Relay and SHO Command [Show/View Date Code 20010625 Front-Panel Interface 11-13 SEL-311L Instruction Manual...
Page 500: Scroll Lock Control Of Front Panel Lcd
From the Scroll Locked state, single-step through the display screens, by pressing the SELECT key twice. Wait for the first press to display the next screen as the active display, then press the SELECT key a second time to freeze scrolling. 11-14 Front-Panel Interface Date Code 20010625 SEL-311L Instruction Manual...
Page 501: Exit
Additional Rotating Default Display Example See Figure 5.19 and accompanying text in Section 5: Trip and Target Logic for an example of resetting a rotating default display with the TARGET RESET pushbutton. Date Code 20010625 Front-Panel Interface 11-15 SEL-311L Instruction Manual...
Page 503 Figure 12.3: External Fault ........................12-9 Figure 12.4: Example Standard 15-Cycle Event Report 1/4 Cycle Resolution (Backup Protection)........................12-30 Figure 12.5: Example Standard 15-Cycle Event Report 1/4 Cycle Resolution (Differential Protection)........................12-40 Date Code 20010625 Standard Event Reports and SER SEL-311L Instruction Manual...
Page 504 Sampled Current Waveform ..................12-41 Figure 12.7: Derivation of Phasor RMS Current Values From Event Report Current Values .... 12-42 Figure 12.8: Example Sequential Events Recorder (SER) Event Report..........12-46 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 505: Section 12: Standard Event Reports And Ser
Standard 15/30/60-cycle oscillographic event reports for line current differential vÁ protection. In addition, the SEL-311L Relay also provides Sequential Events Recorder (SER) reports. The standard event reports contain date, time, current, voltage, frequency, relay element, optoisolated input, output contact, and fault location information.
Page 506: Standard Event Report Triggering
When setting ER sees a logical 0 to logical 1 transition, it generates an event report (if the SEL-311L Relay is not already generating a report that encompasses the new transition). The factory setting is:...
Page 507: Event Summary
Fault location vÁ Breaker Trip Time vÁ Recloser shot count at the trigger time vÁ System frequency at trigger time vÁ Active Settings Group vÁ Breaker Close Time vÁ Date Code 20010625 Standard Event Reports and SER 12-3 SEL-311L Instruction Manual...
Page 508 The relay sends event summaries to all serial ports with port setting of AUTO = Y each time an event triggers. The latest event summaries are stored in nonvolatile memory and are accessed by the SUM and HIS (Event Summaries/History) commands. 12-4 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 509 Line Current Differential Communications and Serial Communications and Commands. Shot Reclosing Shot Count at trigger time. See Section 6: Close and Reclose Logic. Frequency System frequency at trigger time. Date Code 20010625 Standard Event Reports and SER 12-5 SEL-311L Instruction Manual...
Page 510: Retrieving Full-Length Standard Event Reports
HIS report. Defaults to 1 if not listed, where 1 is the most recent event. Display x samples per cycle (4 or 16); defaults to 4 if not listed. 12-6 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 511 EVE B Display the most recent event report for backup protection at 1/4-cycle resolution. If an event report is requested that does not exist, the relay responds: “Invalid Event” Date Code 20010625 Standard Event Reports and SER 12-7 SEL-311L Instruction Manual...
Page 512: Compressed Ascii Event Reports
Compressed ASCII Event Reports The SEL-311L Relay provides compressed ASCII event reports to facilitate event report storage and display. The SEL-2020 Communications Processor and the SEL-5601 Analytic Assistant software take advantage of the compressed ASCII format. Use the EVE C command or CEV command to capture compressed ASCII event reports.
Page 513: Filtered And Unfiltered Event Reports
Figure 12.3: External Fault Filtered and Unfiltered Event Reports The SEL-311L Relay samples the basic power system measurands (ac voltage, ac current, station battery, and optoisolated inputs) 16 times per power system cycle. The relay filters the measurands to remove transient signals. The relay operates on the filtered values and reports them in the event report.
Page 514: Clearing Standard Event Report Buffer
Voltage measured by channel VS (primary kV) V1Mem Positive-sequence memory voltage (primary kV) FREQ Frequency of Channel VA Voltage measured at power input terminals Z25 and Z26 (Vdc) 12-10 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 515 (MPP2) set, not ZPP1 MPP3 If Zone 3 phase-phase distance element (MPP2) set, not ZPP1 or ZPP2 MPP4 If Zone 4 phase-phase distance element (MPP4) set, not ZPP1, ZPP2, or ZPP3 Date Code 20010625 Standard Event Reports and SER 12-11 SEL-311L Instruction Manual...
Page 516 If Zone 3 AG element (XAG3 or MAG3) set, not ZAG1 or ZAG2 ZAG4 If Zone 4 AG element (XAG4 or MAG4) set, not ZAG1 or ZAG2 or ZAG3 12-12 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 517 1 cycle, not electromechanical reset) 50P 1 2 50P1, 50P2 50P1 asserted 50P2 asserted both 50P1 and 50P2 asserted 50P 3 50P3 50P3 asserted Date Code 20010625 Standard Event Reports and SER 12-13 SEL-311L Instruction Manual...
Page 518 Reverse current polarized ground directional element R32I picked up. 67P 1 2 67P1, 67P2 67P1 asserted 67P2 asserted both 67P1 and 67P2 asserted 67P 3 67P3 67P3 asserted 12-14 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 519 27C picked up. 27A and 27B elements picked up. 27B and 27C elements picked up. 27C and 27A elements picked up. 27A, 27B, and 27C elements picked Date Code 20010625 Standard Event Reports and SER 12-15 SEL-311L Instruction Manual...
Page 520 59CA picked up. 59AB and 59CA elements picked up. 59AB and 59BC elements picked up. 59BC and 59CA elements picked up. 59AB, 59BC and 59CA elements picked up. 12-16 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 521 81 3 4 81D3, 81D4 Level 3 instantaneous frequency element asserted. Level 4 instantaneous frequency element asserted. Level 3 and 4 instantaneous frequency elements asserted. Date Code 20010625 Standard Event Reports and SER 12-17 SEL-311L Instruction Manual...
Page 522 ZLOUT picked up. Loss-of-potential element LOP picked DCHI, DCLO Station battery instantaneous overvoltage element DCHI picked up. Station battery instantaneous undervoltage element DCLO picked Both DCHI and DCLO asserted. 12-18 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 523 This column is visible only when positive-sequence, polarized phase mho elements are enabled (E21P does not contain “C”). This column is visible only when compensator distance mho elements are enabled (E21P contains “C”). Date Code 20010625 Standard Event Reports and SER 12-19 SEL-311L Instruction Manual...
Page 524 Z3XT asserted. DSTR DSTRT Directional carrier start DSTRT asserted. NSTR NSTRT Nondirectional carrier start NSTRT asserted. STOP STOP Carrier stop STOP asserted. Block trip input extension BTX asserted. 12-20 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 525 Both RMB5A and RMB6A asserted. RMB A 7 8 RMB7A, RMB8A channel A receive bit IRRORED 7 RMB7A asserted. channel A receive bit IRRORED 8 RMB8A asserted. Both RMB7A and RMB8A asserted. Date Code 20010625 Standard Event Reports and SER 12-21 SEL-311L Instruction Manual...
Page 526 Both RMB5B and RMB6B asserted. RMB B 7 8 RMB7B, RMB8B channel B receive bit IRRORED 7 RMB7B asserted. channel B receive bit IRRORED 8 RMB8B asserted. Both RMB7B and RMB8B asserted. 12-22 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 527 Ltch RW 9 00–FF Hex value of Relay Word 9, **Hex LT1–LT8, Latch Bits LT9–LT16 Ltch RW 10 00–FF Hex value of Relay Word 10, **Hex LT9–LT16, Latch Bits Date Code 20010625 Standard Event Reports and SER 12-23 SEL-311L Instruction Manual...
Page 528 (see Figure 12.4 and Table 12.1). These currents are listed at the end of the event report in the event summary. If the “trigger” row (>) and the faulted phase current row (*) are the same row, the * symbol takes precedence. 12-24 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 529 ÁÁÁÁ!#ÁÁ%%ÁÁÁ%"ÁÁÁÁÁÁÁÁ## ÁÁÁ %ÁÁ##ÁÁÁ!$ÁÁÁÁÁÁÁ%&Á#ÁÁ ÁÁ ÁÁÁ#Á"$%ÁÁ&ÁÁÁÁÁÁÁ$ÁÁ!##ÁÁ% ÁÁ!"ÁÁÁÁÁÁ& %Á#ÁÁ ÁÁ ÁÁÁ!$ÁÁÁ%&ÁÁ%%ÁÁÁÁÁÁ###ÁÁ $ÁÁÁ##ÁÁ!$ÁÁÁÁÁ%$Á#ÁÁ ÁÁ ÁÁ#ÁÁ"%Á&"ÁÁÁÁÁÁÁ#&Á!##ÁÁÁ% ÁÁÁ!"ÁÁÁÁÁÁ& Á#ÁÁ ÁÁ `bÁ ÁÁÁÁ!#ÁÁ%"ÁÁÁ%!ÁÁÁÁÁÁÁÁ##"ÁÁÁ "ÁÁ##ÁÁÁ!$ÁÁÁÁÁÁÁ%"Á#ÁÁ ÁÁ ÁÁÁ"Á"$&ÁÁ& ÁÁÁÁÁÁÁ$ÁÁ!##ÁÁ%!ÁÁ!!&ÁÁÁÁÁÁ&#Á#ÁÁ ÁÁ ÁÁÁ!#ÁÁÁ!&ÁÁ$ ÁÁÁÁÁÁ#ÁÁ %ÁÁÁ#$ÁÁ#!ÁÁÁÁÁ% Á#ÁÁ ÁÁ ÁÁ"!ÁÁ"#ÁÁ$%ÁÁÁÁÁÁÁÁ!"ÁÁÁ ÁÁÁ"!ÁÁÁÁÁÁ& &Á#ÁÁ Á Date Code 20010625 Standard Event Reports and SER 12-25 SEL-311L Instruction Manual...
Page 530 ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ `bÁ ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ ` bÁ ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ `!bÁ ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ ÁÁUÁÁÁÁÁÁÁÁ€ÁÁÁÁÁÁ ÁÁUÁÁÁÁÁÁÁÁÁÁÁÁÁ1Á `"bÁ ÁÁUÁÁÁPPÁÁÁÁÁÁÁÁÁÁÁ ÁÁUÁÁÁPPÁÁÁÁÁÁg!ÁgÁÁÁÁ ÁÁUÁÁÁPPÁÁÁÁÁÁg!ÁgÁÁÁÁ ÁÁUÁÁÁPPÁÁÁÁÁÁg!ÁgÁÁÁÁ `#bÁ ÁÁUÁÁÁPPÁÁÁÁÁÁg!ÁgÁÁÁÁ ÁÁUÁÁÁPPÁÁÁÁÁÁg!ÁgÁÁÁÁ ÁÁUÁÁÁPPÁÁÁÁÁÁg!ÁgÁÁÁÁ ÁÁUÁÁÁPPÁÁÁÁÁÁg!ÁgÁÁÁ 12-26 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 531 ÁÁUÁƒÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁUÁƒÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁUÁƒÁÁÁÁÁÁÁÁÁÁÁÁÁ Á 6€xx†ythf…t€yÁ8wpxpy…„ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ6€y…ƒ€wÁ8wpxpy…„Á Á ÁRÁÁIYÁ88ÁÁÁY7GRÁÁSF5ÁÁQF5ÁÁSF5ÁÁQF5ÁÁQQ6EÁÁÁEhwÁÁÁQpxÁÁÁE…hsÁÁR8E€rthÁ HÁÁS DD6VTÁ RRS5Á4ÁÁÁÁ4ÁÁÁÁ5ÁÁÁÁ5ÁÁÁÁH555Á ISÁIQQ88S95ÁWSSHSÁ "$Á "$Á "$Á "$ÁD44HÁHÁQVÁQVÁQVÁQVÁQVÁQVÁÁÁÁÁÁÁÁÁÁÁ H9ÁSW5XXS65ÁSQQIWÁ!#%Á!#%Á!#%Á!#%ÁÁ77DÁ6ÁÁ"ÁÁ#ÁÁ$ÁÁ%ÁÁ&ÁÁ !"#$%& !"#Á `bÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ `bÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Date Code 20010625 Standard Event Reports and SER 12-27 SEL-311L Instruction Manual...
Page 532 ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ `bÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ `bÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ` bÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ `!bÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ `"bÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 12-28 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 533 IE49ÁÁ0Á ÁÁÁÁGE49ÁÁ0 ÁÁÁÁIE4QÁÁ0Á"ÁÁÁGE4QÁÁ0ÁÁÁÁÁ 7BQ ÁÁ0ÁQÁÁÁÁÁÁÁÁ7BQ!ÁÁ0Á9ÁÁÁÁÁÁÁÁÁ HQ78QÁ0ÁPUBÁÁÁÁÁÁÁ 6EH8G70ÁH99ÁÁÁÁÁÁ"48G70ÁÁÁÁÁRHS97Á0Á ÁÁÁÁÁ Y Q57Á0Á"ÁÁÁÁÁ85ED7Á0ÁÁÁÁÁ8S7ITÁ0ÁÁÁÁÁÁÁ 87TQ7Á0Á!ÁÁÁÁÁ8V96ÁÁ0ÁGÁÁÁÁÁÁÁÁÁ 7FS6ÁÁ0Á#ÁÁÁÁÁÁÁI78FIÁ0ÁH99ÁÁÁÁÁÁ@78FIÁ0ÁH99ÁÁÁÁÁÁP78FIÁ0ÁH99ÁÁÁÁÁÁÁ S7TQ7Á0Á&ÁÁÁÁÁ697ÁÁÁ0Á#ÁÁÁÁ IH7ÁÁ0Á"ÁÁÁÁÁHIHÁÁÁ0Á"ÁÁÁÁÁÁÁÁ "EIÁÁ0Á"ÁÁÁÁÁÁ Á R8E€rthÁrƒ€†ÁÁ Á R8E€rthÁ6€y…ƒ€wÁ8‚†f…t€y„'Á SQÁÁÁÁ0FIÁÁY@ÁÁFISÁÁY@SÁÁ"@SÁÁ"PSÁÁH6Á SQ6HFF0FIÁÁY@Á SQRHS90FIÁÁY@ÁÁ"IÁ 7SSÁÁÁ0Á TESQÁÁ0ÂÉ"EÁÁ"@Á ISÁÁÁ0BGÁ "4ÁÁÁ0BGÁ 6EÁÁÁÁ066Á TE6EÁÁ0SQBIÁÁSQBI%$Á #$IS60Á Date Code 20010625 Standard Event Reports and SER 12-29 SEL-311L Instruction Manual...
Page 534 SXÁÁÁ0Á S XÁÁÁ0Á S!XÁÁÁ0Á Á Á @w€gfwÁRp……tyr„'Á S@QÁÁÁ0Á%ÁÁG9Q8PÁ0Á#ÁÁÁÁÁÁÁIAQHSÁ0Á456ÁÁÁÁÁÁÁ 74S8d90ÁF7XÁÁÁÁÁÁ9IdSHÁ0Á"ÁÁÁÁR6QHE70Á"ÁÁÁÁÁÁÁÁÁ E8QÁÁÁ0Á"ÁÁÁÁÁÁÁIQ8ÁÁÁ0Á!ÁÁÁÁÁÁÁÁ76EHIÁ0ÁH99ÁÁÁÁÁÁ76ABIÁ0ÁH99ÁÁÁÁÁÁÁ BG70ÁÁÁÁÁÁBG70ÁÁÁÁÁÁBG 70ÁÁÁÁÁÁBG!70ÁÁÁÁÁÁÁ BG"70ÁÁÁÁÁÁBG#70ÁÁÁÁÁÁÁ 85FHGÁ0ÁGÁ Á 01Á Figure 12.4: Example Standard 15-Cycle Event Report 1/4 Cycle Resolution (Backup Protection) 12-30 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 535 87LL 87L asserted Rstr A R87LA R87LA asserted Rstr B R87LB R87LB asserted Rstr C R87LC R87LC asserted Rstr G R87LG R87LG asserted Rstr 2 R87L2 R87L2 asserted Date Code 20010625 Standard Event Reports and SER 12-31 SEL-311L Instruction Manual...
Page 536 (not electromechanical reset) T50Q T50Q, T50QR, Tap load inst./def.-time overcurrent negative T50QT seq. element picked up Tap load inst./def.-time overcurrent negative seq. trip element asserted 12-32 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 537 Differential channel transmit bit T1Y asserted T2X, T2Y Differential channel transmit bit T2X and T2Y asserted Differential channel transmit bit T2X asserted Differential channel transmit bit T2Y asserted Date Code 20010625 Standard Event Reports and SER 12-33 SEL-311L Instruction Manual...
Page 538 Out1 3 4 OUT103, OUT104 OUT103 asserted OUT104 asserted Both OUT103 and OUT104 asserted Out1 5 6 OUT105, OUT106 OUT105 asserted OUT106 asserted Both OUT105 and OUT106 asserted 12-34 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 539 In1 3 4 IN103, IN104 IN103 asserted IN104 asserted Both IN103 and IN104 asserted In1 5 6 IN105, IN106 IN105 asserted IN106 asserted Both IN105 and IN106 asserted Date Code 20010625 Standard Event Reports and SER 12-35 SEL-311L Instruction Manual...
Page 540: Example Standard 15-Cycle Event Report (Backup Protection)
ÁÁ!#ÁÁÁ&!#Á ÁÁÁ!%ÁÁÁ!&&Á#!ÁÁÁÁÁÁÁ!!"Á"$$ÁÁ ÁÁ$ÁÁ %ÁÁ#$ ÁÁÁ$ÁÁ!$Á!ÁÁÁÁÁÁÁ$!"Á$"ÁÁ ÁÁÁ!#ÁÁ& $ÁÁ !ÁÁ!%ÁÁ!&ÁÁ"#ÁÁÁÁÁ!&ÁÁ"#ÁÁ ÁÁÁ$Á !ÁÁÁ#$ÁÁ$Á!%ÁÁ!ÁÁÁÁÁÁ$ ÁÁ$ÁÁ `&bÁ ÁÁ!#ÁÁÁ&!!Á ÁÁÁ!$ÁÁÁ!&#Á# ÁÁÁÁÁÁÁ!!Á"$!ÁÁ ÁÁ$ÁÁ %ÁÁ#$!ÁÁÁ$ÁÁ!Á $ÁÁÁÁÁÁÁ$ %Á$ÁÁ ÁÁÁ!"ÁÁ& $ÁÁ "ÁÁ!$ÁÁ!%#ÁÁ"ÁÁÁÁÁ! ÁÁ"""ÁÁ ÁÁÁ$Á !ÁÁÁ#$ÁÁ$Á! ÁÁ #ÁÁÁÁÁÁ$ $ÁÁ$$Á 12-36 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 541 456@EÁ456@ÁII@@PPÁ4568Á@Á !Á !ÁSSÁ7ÁDÁ!#4Á!#ÁÁ!#Á `bÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ `bÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ` bÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ `!bÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁ1Á `"bÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁgÁÁWÁg!ÁgÁÁÁ ÁÁÁÁÁÁÁgÁÁWÁg!ÁgÁÁÁ ÁÁÁÁÁÁÁWgÁÁWÁg!ÁgÁÁÁ Date Code 20010625 Standard Event Reports and SER 12-37 SEL-311L Instruction Manual...
Page 542 ÁÁÁÁÁÁÁÁÁWÁgÁgÁÁÁ `!bÁ ÁÁÁÁÁÁÁÁÁWÁgÁgÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁgÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁgÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ `"bÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁWÁÁÁÁÁ Á 8‡py…'Á56@ÁSÁÁE€hf…t€y'ÁÁÁ!&ÁÁRs€…'ÁÁÁÁ9ƒp‚†pyh'ÁÁ#Á Sfƒrp…„'Á%$ÁYHG8Á 6†ƒƒpy…„ÁÉ4ÁIƒtÁ456I@P'ÁÁÁÁ&ÁÁ"%!ÁÁ!&ÁÁÁÁÁÁÁÁ#%!ÁÁ%%Á Á @ƒ€†ÁÁ Á @ƒ€†ÁRp……tyr„'Á QB7ÁÁÁ0R8E EÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁSB7ÁÁÁ08W4FIE8'Á5TRÁ5Á5Q84D8QÁ ÁÁÁÁÁÁÁ 6SQÁÁÁ0ÁÁÁÁÁÁÁ4IIÁÁÁ0Á EÁÁÁÁÁÁ 8%$EÁÁ0ÁÁÁÁÁÁÁÁÁ8ARSÁÁ0ÁÁÁÁÁÁÁÁÁ8AR7SS0ÁGÁÁÁÁÁÁÁÁÁ 877ÁÁÁ0ÁGÁÁÁÁÁÁÁÁ8S4IÁÁ0ÁGÁÁÁÁÁÁÁÁÁ I6A4GÁ0ÁWÁÁÁÁÁÁÁÁ8AR6ÁÁ0ÁGÁÁÁÁÁÁÁÁ6SQdWÁ0ÁÁÁÁÁÁÁÁ %$EIIÁ0Á#ÁÁÁÁÁ%$EIÁ0Á"ÁÁÁÁÁ%$E@IÁ0ÁH99ÁÁÁÁÁÁ6S4EQF0Á"ÁÁÁÁÁÁ 12-38 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 543 R8E€rthÁ6€y…ƒ€wÁ8‚†f…t€y„'Á SQÁÁÁÁ0FIÁÁY@ÁÁFISÁÁY@SÁÁ"@SÁÁ"PSÁÁH6Á SQ6HFF0FIÁÁY@Á SQRHS90FIÁÁY@ÁÁ"IÁ 7SSÁÁÁ0Á TESQÁÁ0ÂÉ"EÁÁ"@Á ISÁÁÁ0BGÁ "4ÁÁÁ0BGÁ 6EÁÁÁÁ066Á TE6EÁÁ0SQBIÁÁSQBI%$Á #$IS60Á "@S6Á0Á "PS6Á0Á HTS0SQBIÁ HTS0SQBIÁ HTS 06EHR8Á HTS!0D8XÁ HTS"0Á HTS#0Á HTS$0%$AV4EÁ HTS0SQBIÁÁSQBI%$Á HTS0SQBIÁÁSQBI%$Á HTS 0Á HTS!0Á HTS"0Á HTS#0Á Date Code 20010625 Standard Event Reports and SER 12-39 SEL-311L Instruction Manual...
Page 544 6 in the line current differential report. The currents in the line current differential report are delayed by approximately 1/2 cycle plus channel delay by the data alignment processing algorithms. 12-40 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 545 In Figure 12.6, note that any two rows of current data from the event report in Figure 12.5, 1/4 cycle apart, can be used to calculate RMS current values. Date Code 20010625 Standard Event Reports and SER 12-41 SEL-311L Instruction Manual...
Page 546 RMS current values. In Figure 12.7, at the present sample, the phasor RMS current value is: IBT = 3102 A 27.8 12-42 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 547: Sequential Events Recorder (Ser) Report
The relay displays the setting as: SER1 = 51P,51G,51PT,51GT,50P1,50P2 The relay can monitor up to 72 elements in the SER (24 in each of SER1, SER2, and SER3). Date Code 20010625 Standard Event Reports and SER 12-43 SEL-311L Instruction Manual...
Page 548: Retrieving Ser Reports
(top) of the report and the latest row (date 3/23/97) at the end (bottom) of the report. Chronological progression through the report is down the page and in descending row number. 12-44 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 549: Clearing Ser Report
Clear the SER report from nonvolatile memory with the SER C command as shown in the following example: 011R8QÁ6Á)8GS8Q1Á 6wpfƒÁ…spÁR8QÁ 4ƒpÁ€†Á„†ƒpÁÉXGÁ2ÁXÁ)8GS8Q1Á 6wpfƒtyrÁ6€xwp…pÁ (SER) R XAMPLE EQUENTIAL VENTS ECORDER EPORT An example sequential events recorder (SER) report is shown in Figure 12.8. Date Code 20010625 Standard Event Reports and SER 12-45 SEL-311L Instruction Manual...
Page 550 The SER event report rows in Figure 12.8 are explained in the following text, numbered in correspondence to the # column. The boxed, numbered comments in Figure 12.4 and Figure 12.5 also correspond to the # column numbers in Figure 12.8. 12-46 Standard Event Reports and SER Date Code 20010625 SEL-311L Instruction Manual...
Page 551 Refer to High-Speed Output Contacts OUT201 Through OUT206 in Section 7: Input, Output, Timers, and Other Control Logic for an in-depth explanation of the TRIP and TRIP87 logic. Date Code 20010625 Standard Event Reports and SER 12-47 SEL-311L Instruction Manual...
Page 553 Low-Level Test Interface ....................13-4 Test Methods ........................13-5 Testing Alpha Plane 87L Elements .................... 13-6 Introduction ........................13-6 SEL-311L Relay 87L Element Test Procedure ..............13-7 Relay Self-Tests ........................13-13 Relay Troubleshooting ......................13-16 Inspection Procedure ......................13-16 Troubleshooting Procedure ....................13-16 Relay Calibration........................
Page 555: Testing, Troubleshooting, And Commissioning
SECTION 13: TESTING, TROUBLESHOOTING, AND COMMISSIONING NTRODUCTION This section provides guidelines for determining and establishing test routines for the SEL-311L Relay. Included are discussions on testing philosophies, methods, and tools. Relay self-tests and troubleshooting procedures are shown at the end of the section.
Page 556: Maintenance Testing
At SEL, we recommend that maintenance tests on SEL relays be limited under the guidelines provided above. The time saved may be spent analyzing event data and thoroughly testing those systems that require more attention. 13-2 Testing, Troubleshooting, and Commissioning Date Code 20010625 SEL-311L Instruction Manual...
Page 557 The SER command is available at the serial ports. See Section 12: Standard Event Reports and SER. Date Code 20010625 Testing, Troubleshooting, and Commissioning 13-3 SEL-311L Instruction Manual...
Page 558 Communications and Commands. Low-Level Test Interface The SEL-311L Relay has a low-level test interface between the calibrated input module and the separately calibrated processing module. You may test the relay in either of two ways: by using secondary injection testing or by applying low magnitude ac voltage signals to the low-level test interface.
Page 559: Test Methods
(SER). The examples below show the settings necessary to route the phase time-overcurrent element 51PT to the output contacts and the SER. The 51PT element, like many in the SEL-311L Relay, ®...
Page 560: Introduction
Since the SEL-311L Relay often trips in less than one cycle, transient effects in the fault currents do impact operation speed. In some instances, it may be necessary to test using Comtrade files from an EMTP simulation or a real time simulator.
Page 561 The test procedure also disables the disturbance detector (EDD = N) to allow the use of slowly changing currents. SEL-311L Relay 87L Element Test Procedure Purpose: Test the accuracy of phase and negative sequence 87L elements. Test the ground 87L element using an identical procedure.
Page 562 Ground operate element 87LOPG and ground restraint element R87L2 are not tested here. They may be tested with an identical procedure. Required Equipment: Two SEL-311L Relays with established 87L communications interface. vÁ Three-phase secondary injection test equipment, or low-level test equipment such as the vÁ...
Page 563 7. Increase the remote A-phase current at 180 degrees until the R87LA bit solidly asserts. Record the remote A-phase current required to solidly assert R87LA in Table 13.1. Ensure it is within the expected range indicated. Date Code 20010625 Testing, Troubleshooting, and Commissioning 13-9 SEL-311L Instruction Manual...
Page 564 180 degrees* * The SEL-311L Relay is rated to withstand 3 • Inom indefinitely. 9. In the local relay, use the TAR R87LA 10000 command to display the R87LA Relay Word bit 10,000 times, or use the front-panel TAR command to display Relay Word row 57.
Page 565 Expect similar results. 5. Apply the following currents: Local Relay: IA = 2.33 A 0 degrees Remote Relay: IA = 0 A 180 degrees Date Code 20010625 Testing, Troubleshooting, and Commissioning 13-11 SEL-311L Instruction Manual...
Page 566 180 degrees* * The SEL-311L Relay is rated to withstand 3 • Inom indefinitely. 9. In the local relay, use the TAR R87L2 10000 command to display the R87L2 Relay Word bit 10,000 times, or use the front panel TAR command to display Relay Word row 57.
Page 567 A contact (normally open), it opens for an alarm condition or if the relay is deenergized. Alarm condition signaling can be a single 5-second pulse (Pulsed) or permanent (Latched). Date Code 20010625 Testing, Troubleshooting, and Commissioning 13-13 SEL-311L Instruction Manual...
Page 568: Protection)
+11.20 V Latched +14.00 V +15 V PS Warning +14.40 V Pulsed Measures the 15 V power +15.60 V supply every 10 seconds. Failure +14.00 V Latched +16.00 V 13-14 Testing, Troubleshooting, and Commissioning Date Code 20010625 SEL-311L Instruction Manual...
Page 569 ALARM pulsed BOARD Failure 87L only 87HWAL Checks each processing disabled asserted; interval to ensure dedicated ALARM pulsed 87L hardware responds and the watchdog timer has not expired. Date Code 20010625 Testing, Troubleshooting, and Commissioning 13-15 SEL-311L Instruction Manual...
Page 570: Relay Troubleshooting
Condition Limits Disabled Output Description The following self-tests are performed by dedicated circuitry in the microprocessor and the SEL-311L Relay main board. Failures in these tests shut down the microprocessor and are not shown in the STATUS report. Micro- Failure...
Page 571 If the relay is equipped with two channel interfaces, determine if both channel interfaces are being used. If only one channel interface is in use, but the relay is equipped with two channel interfaces, ensure setting PCHAN selects the intended channel. Date Code 20010625 Testing, Troubleshooting, and Commissioning 13-17 SEL-311L Instruction Manual...
Page 572 TIMRX = I in the other relay. Likewise ensure setting TIMRY is correct for channel Y. If the problem persists, the communications link is probably noisy, or unreliable. 13-18 Testing, Troubleshooting, and Commissioning Date Code 20010625 SEL-311L Instruction Manual...
Page 573: Relay Calibration
Repeat Step 3. for the remote relay. 4. If the problem persists, contact the factory for assistance. ELAY ALIBRATION The SEL-311L Relay is factory-calibrated. If you suspect that the relay is out of calibration, please contact the factory. ACTORY SSISTANCE The employee-owners of Schweitzer Engineering Laboratories are dedicated to making electric power safer, more reliable, and more economical.
Page 575 TABLE OF CONTENTS SECTION 14: APPLICATION SETTINGS FOR SEL-311L RELAYS . 14-1 Introduction..........................14-1 Application Setting 87L—Differential Protection with Overcurrent Backup......14-1 Application Settings......................14-3 APP = 87L Settings Sheets ......................14-5 Application Setting 87L21—Differential Protection with Step-Distance Backup ....14-21 Application Settings......................14-23 APP = 87L21 Settings Sheets ....................14-27 Application Setting 87L21P—Differential Protection with Piloted Step-Distance Backup..14-47...
Page 577: Section 14: Application Settings For Sel-311L Relays
RELAYS NTRODUCTION Application Settings in the SEL-311L Relay reduce the number of settings for users who do not require all of the relay features. Some functions are disabled and their settings hidden, while others are reduced in scope and complexity (e.g., one overcurrent element rather than four).
Page 578 • T50QTC* = 87L • = /B87L2 + /50P1 + /50G1 + /51P + /51G * Note: These settings are visible when T50 and T51 functions are enabled. 14-2 Application Settings for SEL-311L Relays Date Code 20010625 SEL-311L Instruction Manual...
Page 579: Application Settings
SEL-311L settings visible. It is important to remember that changing from APP = 311L to APP = 87L changes settings in the SEL-311L. Changing from APP = 87L to APP = 311L makes more SEL-311L settings visible, but does not change any other settings. If SEL-311L functions are used after setting APP is changed from 87L to 311L, do not change setting APP back to 87L.
Page 580 OUT104=0 OUT105=0 OUT106=0 OUT107=87HWAL OUT201=TRIP + TRIP87 Press RETURN to continue OUT202=TRIP + TRIP87 OUT203=0 OUT204=0 OUT205=0 OUT206=0 =/B87L2 + /50P1 + /50G1 + /51P + /51G =>> 14-4 Application Settings for SEL-311L Relays Date Code 20010625 SEL-311L Instruction Manual...
Page 581 ETTINGS HEET Page 1 SEL-311L R (APP = 87L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Identifier Labels and Configuration Settings (See Settings Explanations in Section 9 ) Relay Identifier (30 characters) RID = Terminal Identifier (30 characters)
Page 582 ETTINGS HEET Page 2 SEL-311L R (APP = 87L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Tapped-Load Coordinating Overcurrent Element Settings (If ETAP = Y) Phase element (Y, N) ETP = Residual ground element (Y, N) ETG =...
Page 583 ETTINGS HEET Page 3 SEL-311L R (APP = 87L) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Phase Definite-Time Overcurrent Element Time Delays (See Figure 3.42) Level 1 (0.00–16000.00 cycles in 0.25-cycle steps) 67P1D = Residual Ground Inst./Def.-Time Overcurrent Elements (See Figure 3.45) Level 1 (OFF, 0.25–100.00 A secondary {5 A nom.};...
Page 584 ETTINGS HEET Page 4 SEL-311L R (APP = 87L) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND control equation settings consist of Relay Word bits (see Tables 9.3 and 9.4) and OGIC control equation operators * (AND), + (OR), ! (NOT), / (rising edge), \ (falling edge), OGIC and ( ) (parentheses).
Page 585 ETTINGS HEET Page 5 SEL-311L R (APP = 87L) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Output Contact Equations (See Figure 7.26) Output Contact OUT101 OUT101 = Output Contact OUT102 OUT102 = Output Contact OUT103...
Page 586 ETTINGS HEET Page 6 SEL-311L R (APP = 87L) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND 87L Transmit Bit Equations Channel X, transmit bit 1 T1X = Channel X, transmit bit 2 T2X = Channel Y, transmit bit 1...
Page 587 ETTINGS HEET Page 7 SEL-311L R (APP = 87L) FOR THE ELAY Date SET G LOBAL ETTINGS ERIAL OMMAND RONT ANEL Settings Group Change Delay (See Multiple Setting Groups in Section 7 ) Group change delay (0.00–16000.00 cycles in 0.25-cycle steps)
Page 588 ETTINGS HEET Page 8 SEL-311L R (APP = 87L) FOR THE ELAY Date SET G LOBAL ETTINGS ERIAL OMMAND RONT ANEL Breaker Monitor Settings (See Breaker Monitor in Section 8 ) Breaker monitor enable (Y, N) EBMON = (Make the following settings if preceding enable setting EBMON = Y) Close/Open set point 1—max.
Page 589 ETTINGS HEET Page 9 SEL-311L R (APP = 87L) FOR THE ELAY Date SET R) EQUENTIAL VENTS ECORDER ETTINGS ERIAL OMMAND Sequential Events Recorder settings are comprised of three trigger lists. Each trigger list can include up to 24 Relay Word bits delimited by commas. Enter NA to remove a list of these Relay Word bit settings.
Page 590 ETTINGS HEET Page 10 SEL-311L R (APP = 87L) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Enter the following characters: 0–9, A-Z, #, &, @, -, /, ., space for each text label setting, subject to the specified character limit. Enter NA to null a label.
Page 591 ETTINGS HEET Page 11 SEL-311L R (APP = 87L) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Local Bit LB8 Name (14 characters) NLB8 = Clear Local Bit LB8 Label (7 characters) CLB8 = Set Local Bit LB8 Label (7 characters)
Page 592 ETTINGS HEET Page 12 SEL-311L R (APP = 87L) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Local Bit LB16 Name (14 characters) NLB16 = Clear Local Bit LB16 Label (7 characters) CLB16 = Set Local Bit LB16 Label (7 characters)
Page 593 ETTINGS HEET Page 13 SEL-311L R (APP = 87L) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Display if DP14 = logical 1 (16 characters) DP14_1 = Display if DP14 = logical 0 (16 characters) DP14_0 = Display if DP15 = logical 1 (16 characters)
Page 594 SEL Distributed Port Switch Protocol. Set FASTOP = Y to enable binary Fast Operate messages at the serial port. Set FASTOP = N to block binary Fast Operate messages. Refer to Appendix D for the description of the SEL-311L Relay Fast Operate commands.
Page 595 ETTINGS HEET Page 15 SEL-311L R (APP = 87L) FOR THE ELAY Date SET X SET Y HANNEL ETTINGS ERIAL OMMAND RONT ANEL 87L Channel X Configuration Settings Channel X address check (Y, N) EADDCX = If EADDCX = Y Channel X transmit address (1–16)
Page 597 ROTECTION WITH ISTANCE ACKUP Set APP = 87L21 in the SEL-311L to configure the relay for differential protection and: • Three zones of phase and ground step-distance backup protection. Unused zones may be set to OFF. For example, set overreaching ground distance elements OFF when neighboring protection uses directional ground overcurrent.
Page 598 = M1P + Z1G + M2PT + Z2GT + 67G1T + 51GT + OC • 51GTC = 32GF • T51PTC** = 87L • T51GTC** = 87L • T51QTC** = 87L 14-22 Application Settings for SEL-311L Relays Date Code 20010625 SEL-311L Instruction Manual...
Page 599: Application Settings
If additional capability is needed the relay may be returned to the setting APP = 311L to make all of the SEL-311L settings visible. It is important to remember that changing from APP = 311L to APP = 87L21 changes settings in the SEL-311L. Changing from APP = 87L21 to APP = 311L makes more SEL-311L settings visible, but does not change any other settings.
Page 600 67G1D = 0.00 51GP = OFF 51GC = U3 51GTD = 2.00 51GRS = Y DIR3 CLOEND= OFF 52AEND= 10.00 SOTFD = 30.00 TDURD = 9.00 = 60.00 ==> 14-24 Application Settings for SEL-311L Relays Date Code 20010625 SEL-311L Instruction Manual...
Page 601 OUT206=0 =52A =CHXAL =CHYAL =/B87L2 + /M2P + /Z2G + /51G + /50P1 + /LOP FAULT =87L + M2P + Z2G + 51G Press RETURN to continue =>> Date Code 20010625 Application Settings for SEL-311L Relays 14-25 SEL-311L Instruction Manual...
Page 603 ETTINGS HEET Page 1 SEL-311L R (APP = 87L21) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Identifier Labels and Configuration Settings (See Settings Explanations in Section 9 ) Relay Identifier (30 characters) RID = Terminal Identifier (30 characters)
Page 604 ETTINGS HEET Page 2 SEL-311L R (APP = 87L21) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Tapped-Load Coordinating Overcurrent Element Settings (If ETAP = Y) Phase element (Y, N) ETP = Residual ground element (Y, N) ETG =...
Page 605 ETTINGS HEET Page 3 SEL-311L R (APP = 87L21) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Line Parameter Settings (See Settings Explanations in Section 9 ) Positive-sequence line impedance magnitude Z1MAG = (0.05–255.00 secondary {5 A nom.};...
Page 606 ETTINGS HEET Page 4 SEL-311L R (APP = 87L21) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Mho Phase Distance Element Time Delays (See Figure 3.39) Zone 1 time delay (OFF, 0.00–16000.00 cycles) Z1PD = Zone 2 time delay (OFF, 0.00–16000.00 cycles) Z2PD = Zone 3 time delay (OFF, 0.00–16000.00 cycles)
Page 607 ETTINGS HEET Page 5 SEL-311L R (APP = 87L21) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Reclosing Relay (See Tables 6.2 and 6.3) (Make the following settings if preceding enable setting E79 = 1–4.) Open interval 1 time (0.00–999999.00 cycles in 0.25-cycle steps) 79OI1 = Open interval 2 time (0.00–999999.00 cycles in 0.25-cycle steps)
Page 608 ETTINGS HEET Page 6 SEL-311L R (APP = 87L21) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL SV8 Pickup Time (0.00–16000.00 cycles in 0.25-cycle steps) SV8PU = SV8 Dropout Time (0.00–16000.00 cycles in 0.25-cycle steps) SV8DO = SV9 Pickup Time (0.00–16000.00 cycles in 0.25-cycle steps) SV9PU = SV9 Dropout Time (0.00–16000.00 cycles in 0.25-cycle steps)
Page 609 ETTINGS HEET Page 7 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND control equation settings consist of Relay Word bits (see Tables 9.3 and 9.4) and OGIC control equation operators * (AND), + (OR), ! (NOT), / (rising edge), \ (falling edge), OGIC and ( ) (parentheses).
Page 610 ETTINGS HEET Page 8 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Set Latch Bit LT6 SET6 = Reset latch Bit LT6 RST6 = Set Latch Bit LT7 SET7 = Reset Latch Bit LT7...
Page 611 ETTINGS HEET Page 9 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Torque Control Equations for Tapped Load Inst./Def.-Time Overcurrent Elements [Note: torque control equation settings cannot be set directly to logical 0] Phase instantaneous (see Figure 3.20)
Page 612 ETTINGS HEET Page 10 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Output Contact Equations—Differential Board (See Figure 7.27) Output Contact OUT201 OUT201 = Output Contact OUT202 OUT202 = Output Contact OUT203...
Page 613 ETTINGS HEET Page 11 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Other Equations Event report trigger conditions (see Section 12) ER = Fault indication (used in time target logic—see Table FAULT = 5.1;...
Page 614 ETTINGS HEET Page 12 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET G LOBAL ETTINGS ERIAL OMMAND RONT ANEL Settings Group Change Delay (See Multiple Setting Groups in Section 7 ) Group change delay (0.00–16000.00 cycles in 0.25-cycle steps)
Page 615 ETTINGS HEET Page 13 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET G LOBAL ETTINGS ERIAL OMMAND RONT ANEL Breaker Monitor Settings (See Breaker Monitor in Section 8 ) Breaker monitor enable (Y, N) EBMON = (Make the following settings if preceding enable setting EBMON = Y) Close/Open set point 1—max.
Page 616 ETTINGS HEET Page 14 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET R) EQUENTIAL VENTS ECORDER ETTINGS ERIAL OMMAND Sequential Events Recorder settings are comprised of three trigger lists. Each trigger list can include up to 24 Relay Word bits delimited by commas. Enter NA to remove a list of these Relay Word bit settings.
Page 617 ETTINGS HEET Page 15 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Enter the following characters: 0–9, A-Z, #, &, @, -, /, ., space for each text label setting, subject to the specified character limit. Enter NA to null a label.
Page 618 ETTINGS HEET Page 16 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Local Bit LB8 Name (14 characters) NLB8 = Clear Local Bit LB8 Label (7 characters) CLB8 = Set Local Bit LB8 Label (7 characters)
Page 619 ETTINGS HEET Page 17 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Local Bit LB16 Name (14 characters) NLB16 = Clear Local Bit LB16 Label (7 characters) CLB16 = Set Local Bit LB16 Label (7 characters)
Page 620 ETTINGS HEET Page 18 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Display if DP14 = logical 1 (16 characters) DP14_1 = Display if DP14 = logical 0 (16 characters) DP14_0 = Display if DP15 = logical 1 (16 characters)
Page 621 SEL Distributed Port Switch Protocol. Set FASTOP = Y to enable binary Fast Operate messages at the serial port. Set FASTOP = N to block binary Fast Operate messages. Refer to Appendix D for the description of the SEL-311L Relay Fast Operate commands.
Page 622 ETTINGS HEET Page 20 SEL-311L R (APP = 87L21) FOR THE ELAY Date SET X SET Y HANNEL ETTINGS ERIAL OMMAND RONT ANEL 87L Channel X Configuration Settings Channel X address check (Y, N) EADDCX = If EADDCX = Y Channel X transmit address (1–16)
Page 623 ILOTED ISTANCE ACKUP Set APP = 87L21P in the SEL-311L to configure the relay for differential protection, including • Four zones of phase- and ground-distance backup protection. Unused zones may be set to OFF. For example, set overreaching ground distance elements OFF when neighboring protection uses directional ground overcurrent.
Page 624 • (Visible when ECOMM ≠ N) TRCOMM = M2P +Z2G + 67G2 • 51GTC = 32GF • T51PTC** = 87L • T51GTC** = 87L • T51QTC** = 87L 14-48 Application Settings for SEL-311L Relays Date Code 20010625 SEL-311L Instruction Manual...
Page 625: Application Settings
If additional capability is needed the relay may be returned to the setting APP = 311L to make all of the SEL-311L settings visible. It is important to remember that changing from APP = 311L to APP = 87L21P changes settings in the SEL-311L. Changing from APP = 87L21P to APP = 311L makes more SEL-311L settings visible, but does not change any other settings.
Page 626 67G3D = 0.00 51GP = OFF 51GC = U3 51GTD = 2.00 51GRS = Y DIR3 DIR4 CLOEND= OFF 52AEND= 10.00 SOTFD = 30.00 TDURD = 9.00 = 60.00 ==> 14-50 Application Settings for SEL-311L Relays Date Code 20010625 SEL-311L Instruction Manual...
Page 627 OUT206=0 =52A =CHXAL =CHYAL =/B87L2 + /M2P + /Z2G + /51G + /50P1 + /LOP FAULT =87L + M2P + Z2G + 51G Press RETURN to continue =>> Date Code 20010625 Application Settings for SEL-311L Relays 14-51 SEL-311L Instruction Manual...
Page 629 ETTINGS HEET Page 1 SEL-311L R (APP = 87L21P) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Identifier Labels and Configuration Settings (See Settings Explanations in Section 9 ) Relay Identifier (30 characters) RID = Terminal Identifier (30 characters)
Page 630 ETTINGS HEET Page 2 SEL-311L R (APP = 87L21P) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Tapped-Load Coordinating Overcurrent Element Settings (If ETAP = Y) Phase element (Y, N) ETP = Residual ground element (Y, N) ETG =...
Page 631 ETTINGS HEET Page 3 SEL-311L R (APP = 87L21P) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Line Parameter Settings (See Settings Explanations in Section 9 ) Positive-sequence line impedance magnitude Z1MAG = (0.05–255.00 secondary {5 A nom.};...
Page 632 ETTINGS HEET Page 4 SEL-311L R (APP = 87L21P) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Mho Ground Distance Elements Z1MG = Zone 1 (OFF, 0.05–64.00 secondary {5 A nom.}; VÁ 0.25–320.00 secondary {1 A nom.}) (see Figure 3.32) Z2MG = Zone 2 (OFF, 0.05–64.00...
Page 633 ETTINGS HEET Page 5 SEL-311L R (APP = 87L21P) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Residual Ground Inst./Def.-Time Overcurrent Elements (See Figure 3.45) Level 1 (OFF, 0.25–100.00 A secondary {5 A nom.}; 50G1P = 0.05–20.00 A secondary {1 A nom.}) Level 2 (OFF, 0.25–100.00 A secondary {5 A nom.};...
Page 634 ETTINGS HEET Page 6 SEL-311L R (APP = 87L21P) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Switch-Onto-Fault (See Figure 5.5) (Make the following settings if preceding enable setting ESOTF = Y.) Close enable time delay (OFF, 0.00–16000.00 cycles in 0.25-cycle steps) CLOEND = 52A enable time delay (OFF, 0.00–16000.00 cycles in 0.25-cycle steps)
Page 635 ETTINGS HEET Page 7 SEL-311L R (APP = 87L21P) FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Control Equation Variable Timers (See Figures 7.23 and 7.24) OGIC (Number of timer pickup/dropout settings dependent on preceding enable setting ESV = 1–16.) SV1 Pickup Time (0.00–999999.00 cycles in 0.25-cycle steps)
Page 636 ETTINGS HEET Page 8 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND control equation settings consist of Relay Word bits (see Tables 9.3 and 9.4) and OGIC control equation operators * (AND), + (OR), ! (NOT), / (rising edge), \ (falling edge), OGIC and ( ) (parentheses).
Page 637 ETTINGS HEET Page 9 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Latch Bits Set/Reset Equations (See Figure 7.11) Set Latch Bit LT1 SET1 = Reset Latch Bit LT1 RST1 =...
Page 638 ETTINGS HEET Page 10 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Torque Control Equations for Inst./Def.-Time Overcurrent Elements [Note: torque control equation settings cannot be set directly to logical 0] Level 1 phase (see Figure 3.42)
Page 639 ETTINGS HEET Page 11 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND control equation Variable SV14 SV14 = OGIC control equation Variable SV15 SV15 = OGIC control equation Variable SV16 SV16 = OGIC Output Contact Equations (See Figure 7.26)
Page 640 ETTINGS HEET Page 12 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Setting Group Selection Equations (See Table 7.4) Select Setting Group 1 SS1 = Select Setting Group 2 SS2 =...
Page 641 ETTINGS HEET Page 13 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND 87L Transmit Bit Equations Channel X, transmit bit 1 T1X = Channel X, transmit bit 2 T2X = Channel Y, transmit bit 1...
Page 642 ETTINGS HEET Page 14 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET G LOBAL ETTINGS ERIAL OMMAND RONT ANEL Settings Group Change Delay (See Multiple Setting Groups in Section 7 ) Group change delay (0.00–16000.00 cycles in 0.25-cycle steps)
Page 643 ETTINGS HEET Page 15 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET G LOBAL ETTINGS ERIAL OMMAND RONT ANEL Breaker Monitor Settings (See Breaker Monitor in Section 8 ) Breaker monitor enable (Y, N) EBMON = (Make the following settings if preceding enable setting EBMON = Y) Close/Open set point 1—max.
Page 644 ETTINGS HEET Page 16 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET R) EQUENTIAL VENTS ECORDER ETTINGS ERIAL OMMAND Sequential Events Recorder settings are comprised of three trigger lists. Each trigger list can include up to 24 Relay Word bits delimited by commas. Enter NA to remove a list of these Relay Word bit settings.
Page 645 ETTINGS HEET Page 17 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Enter the following characters: 0–9, A-Z, #, &, @, -, /, ., space for each text label setting, subject to the specified character limit. Enter NA to null a label.
Page 646 ETTINGS HEET Page 18 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Local Bit LB8 Name (14 characters) NLB8 = Clear Local Bit LB8 Label (7 characters) CLB8 = Set Local Bit LB8 Label (7 characters)
Page 647 ETTINGS HEET Page 19 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Local Bit LB16 Name (14 characters) NLB16 = Clear Local Bit LB16 Label (7 characters) CLB16 = Set Local Bit LB16 Label (7 characters)
Page 648 ETTINGS HEET Page 20 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Display if DP14 = logical 1 (16 characters) DP14_1 = Display if DP14 = logical 0 (16 characters) DP14_0 = Display if DP15 = logical 1 (16 characters)
Page 649 SEL Distributed Port Switch Protocol. Set FASTOP = Y to enable binary Fast Operate messages at the serial port. Set FASTOP = N to block binary Fast Operate messages. Refer to Appendix D for the description of the SEL-311L Relay Fast Operate commands.
Page 650 ETTINGS HEET Page 22 SEL-311L R (APP = 87L21P) FOR THE ELAY Date SET X SET Y HANNEL ETTINGS ERIAL OMMAND RONT ANEL 87L Channel X Configuration Settings Channel X address check (Y, N) EADDCX = If EADDCX = Y Channel X transmit address (1–16)
Page 651 A5E3 Fast Operate Breaker Control .................. D-10 A5CD Fast Operate Reset Definition Block..............D-11 A5ED Fast Operate Reset Command ................D-11 ID Message ........................D-11 DNA Message........................D-12 BNA Message ........................D-14 SNS Message ........................D-14 Date Code 20011112 Appendices Table of Contents SEL-311L Instruction Manual...
Page 652 APPENDIX E: COMPRESSED ASCII COMMANDS.......E-1 Introduction..........................E-1 CASCII Command—General Format ..................E-1 CASCII Command—SEL-311L....................E-2 CSTATUS Command—SEL-311L ..................... E-5 CHISTORY Command—SEL-311L................... E-5 CEVENT Command—SEL-311L ....................E-6 CSUMMARY Command—SEL-311L..................E-8 APPENDIX F: SETTING NEGATIVE-SEQUENCE OVERCURRENT ELEMENTS ..............F-1 Setting Negative-Sequence Definite-Time Overcurrent Elements ..........F-1 Setting Negative-Sequence Time-Overcurrent Elements.............F-1...
Page 653 Table G.1: SEL Control Equation Operators (Listed in Processing Order) ........G-3 OGIC Table H.1: Data Access Methods ......................H-2 Table H.2: SEL-311L DNP Object Table....................H-5 Table H.3: SEL-311L-Wye DNP Data Map.................... H-9 Date Code 20011112 Appendices Table of Contents...
Page 654 Figure J.1: Example System Single Line....................J-1 Figure J.2: Sequence Connection Diagram for an Internal Three-Phase Fault ........J-1 Figure J.3: Sequence Connection Diagram for an A-Phase Ground Fault..........J-4 Appendices Table of Contents Date Code 20011112 SEL-311L Instruction Manual...
Page 655 APPENDIX A: FIRMWARE VERSIONS This manual covers SEL-311L Relays that contain firmware bearing the following part numbers and revision numbers (most recent firmware listed at top): Firmware Part/Revision No. Description of Firmware SEL-311L-R103-V0-Z001001-D20011109 This firmware differs from the original as follows: −...
Page 657: Appendix B: Firmware Upgrade Instructions
XMODEM/CRC), and transfer files (e.g., send and receive binary files). 1. If the relay is in service, disable its control functions. Note: If the SEL-311L Relay contains History (HIS) data, Event (EVE) data, Metering (MET) data, or Sequential Events Recorder (SER) data that you want to retain, you must retrieve this data prior to performing the firmware upgrade, because all of these data sets may be erased in the upgrade procedure.
Page 658 “S19”. This “S19” file is the firmware that must be downloaded to the relay. 8. Begin the transfer of the new firmware to the relay by issuing the Receive (REC) command to instruct the relay to receive new firmware. Firmware Upgrade Instructions Date Code 20011112 SEL-311L Instruction Manual...
Page 659 REC command to reinstall firmware,” or “Program is invalid.” Or the relay will be totally unresponsive, with no local LCD display. In the first or second case, attempt to reload firmware from Step 8. In the third case (relay is unresponsive), contact the factory. Date Code 20011112 Firmware Upgrade Instructions SEL-311L Instruction Manual...
Page 660 <ENTER>. If the relay reinitializes after saving the changes, go to Access Level 2. 15. Execute the Status (STA) command to verify that all relay self-test parameters are within tolerance, and that the relay is enabled. Firmware Upgrade Instructions Date Code 20011112 SEL-311L Instruction Manual...
Page 661 Issue the Trigger (TRI) and Event (EVE) commands. Verify that the current and voltage signals are correct in the event report. The relay is now ready for your commissioning procedure. Date Code 20011112 Firmware Upgrade Instructions SEL-311L Instruction Manual...
Page 663: Operation
6. Enter the sequence CTRL-X QUIT <CR> before entering the prefix character if all relays in the multidrop network do not have the same prefix setting. Note: You can use the front-panel SET pushbutton to change the port settings to return to SEL protocol. Date Code 20010625 SEL Distributed Port Switch Protocol SEL-311L Instruction Manual...
Page 665: Appendix D: Configuration, Fast Meter, And Fast
A5CE Fast Operate Configuration Block A5E0 Fast Operate Remote Bit Control A5E3 Fast Operate Breaker Control A5CD Fast Operate Reset Definition Block A5ED Fast Operate Reset Command Date Code 20010625 Configuration, Fast Meter, and Fast Operate Commands SEL-311L Instruction Manual...
Page 666: Message Definitions
Reconfigure peak demand Fast Meter on settings change 0100 SEL protocol has Fast Operate 0101 LMD protocol has Fast Operate 0005 DNP 3.00 0006 R6 SEL (relay-to-relay) M protocol IRRORED Reserved Checksum Configuration, Fast Meter, and Fast Operate Commands Date Code 20010625 SEL-311L Instruction Manual...
Page 667 0000 Scale factor offset in Fast Meter message 565300000000 Analog channel name (VS) Analog channel type Scale factor type 0000 Scale factor offset in Fast Meter message Date Code 20010625 Configuration, Fast Meter, and Fast Operate Commands SEL-311L Instruction Manual...
Page 668 Scale factor offset in Fast Meter message Line Configuration (0-ABC, 1-ACB) Standard Power Calculations FFFF No Deskew angle FFFF No Rs compensation (-1) FFFF No Xs compensation (-1) Configuration, Fast Meter, and Fast Operate Commands Date Code 20010625 SEL-311L Instruction Manual...
Page 669 Time stamp offset FFFF Digital offset 494100000000 Analog channel name (IA) Analog channel type (Double) Scale factor type 0000 Scale factor offset in Fast Meter message (Hex) Date Code 20010625 Configuration, Fast Meter, and Fast Operate Commands SEL-311L Instruction Manual...
Page 670 Scale factor offset in Fast Meter message (Hex) 51332B000000 Analog channel name (Q3+) Analog channel type (Double) Scale factor type 0000 Scale factor offset in Fast Meter message (Hex) Configuration, Fast Meter, and Fast Operate Commands Date Code 20010625 SEL-311L Instruction Manual...
Page 671 MW3PO, MVA O, MVB O, MVC O, MV3PO in 8-byte IEEE FPS 8 bytes Time stamp 1 byte Reserved 1 byte 1-byte checksum of all preceding bytes Date Code 20010625 Configuration, Fast Meter, and Fast Operate Commands SEL-311L Instruction Manual...
Page 672 In response to the A5B9 request, the relay clears the Fast Meter (message A5D1) Status Byte. The SEL-311L Relay Status Byte contains one active bit, STSET (bit 4). The bit is set on power up and on settings changes. If the STSET bit is set, the external device should request the A5C1, A5C2, and A5C3 messages.
Page 673 5. The relay is enabled. Remote bit set and clear operations are latched by the relay. Remote bit pulse operations assert the remote bit for one processing interval (1/4 cycle). Date Code 20010625 Configuration, Fast Meter, and Fast Operate Commands SEL-311L Instruction Manual...
Page 674 The relay performs the specified breaker operation if the following conditions are true: 1. Conditions 1-5 defined in the A5E0 message are true. 2. The breaker jumper (JMP2B) is in place on the SEL-311L Relay main board. D-10 Configuration, Fast Meter, and Fast Operate Commands...
Page 675: Id Message
6-digit configuration code. aaaa is an ASCII representation of the 2-byte checksum for each line. The ID message is available from Access Level 1 and higher. Date Code 20010625 Configuration, Fast Meter, and Fast Operate Commands D-11 SEL-311L Instruction Manual...
Page 676: Dna Message
"SV9","SV10","SV11","SV12","SV9T","SV10T","SV11T","SV12T","0CD6"<CR> "SV13","SV14","SV15","SV16","SV13T","SV14T","SV15T","SV16T","0D44"<CR> "MAB1","MBC1","MCA1","MAB2","MBC2","MCA2","CVTBL","SOTFT","0C9A"<CR> "MAG1","MBG1","MCG1","MAG2","MBG2","MCG2","DCHI","DCLO","0BE7"<CR> "BCW","BCWA","BCWB","BCWC","FIDEN","FSA","FSB","FSC","0BAD"<CR> "SG1","SG2","SG3","SG4","SG5","SG6","OC","CC","0969"<CR> "CLOSE","CF","TRGTR","52A","3PO","SOTFE","VPOLV","50L","0C55"<CR> "PDEM","GDEM","QDEM","TRIP","50QF","50QR","50GF","50GR","0C1D"<CR> "32QF","32QR","32GF","32GR","32VE","32QGE","32IE","32QE","0BA4"<CR> "F32I","R32I","F32Q","R32Q","F32QG","R32QG","F32V","R32V","0C18"<CR> "*","*","IN106","IN105","IN104","IN103","IN102","IN101","0AD9"<CR> "ALARM","OUT107","OUT106","OUT105","OUT104","OUT103","OUT102","OUT101", "0FC8"<CR> "M3P","M3PT","Z3G","Z3GT","M4P","M4PT","Z4G","Z4GT","0B64"<CR> "Z3T","Z4T","50P2","67P2","67P2T","50P3","67P3","67P3T","0B78"<CR> "50G2","67G2","67G2T","50G3","67G3","67G3T","*","*","09D3"<CR> "51P","51PT","51PR","Z1X","59VA","MAB3","MBC3","MCA3","0B3C"<CR> "MAG3","MBG3","MCG3","27S","59S","*","59VP","59VS","0A6D"<CR> "SF","25A1","25A2","RCSF","OPTMN","RSTMN","*","*","0A70"<CR> "79RS","79CY","79LO","SH0","SH1","SH2","SH3","SH4","0AAD"<CR> "MAB4","MBC4","MCA4","MAG4","MBG4","MCG4","*","*","0A01"<CR> "XAG1","XBG1","XCG1","XAG2","XBG2","XCG2","XAG3","XBG3","0C16"<CR> "XCG3","XAG4","XBG4","XCG4","OSTI","OSTO","OST","50ABC","0C79"<CR> "X5ABC","X6ABC","OSB","OSB1","OSB2","OSB3","OSB4","UBOSB","0CE0"<CR> "50G4","67G4","67G4T","*","MPP1","MABC1","MPP2","MABC2","0B74"<CR> "50Q1","67Q1","67Q1T","50Q2","67Q2","67Q2T","59N1","59N2","0B90"<CR> D-12 Configuration, Fast Meter, and Fast Operate Commands Date Code 20010625 SEL-311L Instruction Manual...
Page 677 "*" indicates an unused bit location. Messages for other relay models may be derived from the appropriate tables in Section 9: Setting the Relay of this manual, using the above format. Date Code 20010625 Configuration, Fast Meter, and Fast Operate Commands D-13 SEL-311L Instruction Manual...
Page 678: Bna Message
If there are more than eight settings in SER, the SNS message will have several rows. Each row will have eight strings, followed by the checksum and cartridge return. The last row may have fewer than eight strings. SNS message for the SEL-311L Relay is: <STX>"xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","yyyy"<CR> "xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","yyyy"<CR>...
Page 679 COMPRESSED ASCII COMMANDS NTRODUCTION The SEL-311L Relay provides compressed ASCII versions of some of the relay’s ASCII commands. The compressed ASCII commands allow an external device to obtain data from the relay, in a format which directly imports into spreadsheet or database programs, and which can be validated with a checksum.
Page 680 If a compressed ASCII request is made for data that are not available, (e.g. the history buffer is empty or invalid event request), the relay responds with the following message: <STX>"No Data Available","0668"<CR><ETX> CASCII C —SEL-311L OMMAND Display the SEL-311L Relay compressed ASCII configuration message by sending: CAS <CR> The relay sends: <STX> "CAS",6,"01A9"<CR> "CST",1,"01B7"<CR>...
Page 681 "TRIG","Names of elements in the relay word separated by spaces","A42C"<CR> "240D","I","I","I","I","I","F","F","F","F","F","F","I","I","I","I","I","I","I","I","I","I","I","I","I", "2S","136S","14E2"<CR> "CEV R",1,"021D"<CR> "1H","FID","022C"<CR> "1D","45S","0211"<CR> "7H","MONTH","DAY","YEAR","HOUR","MIN","SEC","MSEC","0BB9"<CR> "1D","I","I","I","I","I","I","I","05F4"<CR> "23H","FREQ","SAM/CYC_A","SAM/CYC_D","NUM_OF_CYC","EVENT","LOCATION", "SHOT","TARGETS","IA","IB","IC","IP","IG","3I2","IAL","IBL","ICL","IAX","IBX","ICX", "IAY","IBY","ICY","2723"<CR> "1D","F","I","I","I","6S","F","I","22S","I","I","I","I","I","I","I","I","I","I","I","I","I","I","I", "122C"<CR> "26H","IA","IB","IC","IP","IG","VA(kV)","VB(kV)","VC(kV)","VS(kV)","V1MEM","FREQ", "VDC","IAL","IBL","ICL","IAX","IBX","ICX","IAY","IBY","ICY","IAT","IBT","ICT", "TRIG","Names of elements in the relay word separated by spaces","A42C"<CR> Date Code 20010625 Compressed ASCII Commands SEL-311L Instruction Manual...
Page 682 The last field is the 4-byte hex ASCII representation of the checksum. See CEVENT Command for the definition of the “Names of elements in the relay word separated by spaces” field. Compressed ASCII Commands Date Code 20010625 SEL-311L Instruction Manual...
Page 683 "xxxx" are the data values corresponding to the first line labels and "yyyy" is the 4-byte hex ASCII representation of the checksum. If the history buffer is empty, the relay responds: <STX>"No Data Available","0668"<CR><ETX> Date Code 20010625 Compressed ASCII Commands SEL-311L Instruction Manual...
Page 684 "SAM/CYC_A" is the number of analog data samples per cycle (4 or 16). "SAM/CYC_D" is the number of digital data samples per cycle (4 or 16). "NUM_OF_CYC" is the number of cycles of data in the event report. "EVENT" is the event type. Compressed ASCII Commands Date Code 20010625 SEL-311L Instruction Manual...
Page 685 RMB3A RMB2A RMB1A TMB8A TMB7A TMB6A TMB5A TMB4A TMB3A TMB2A TMB1A RMB8B RMB7B RMB6B RMB5B RMB4B RMB3B RMB2B RMB1B TMB8B TMB7B TMB6B TMB5B TMB4B TMB3B TMB2B TMB1B LBOKB CBADB RBADB ROKB Date Code 20010625 Compressed ASCII Commands SEL-311L Instruction Manual...
Page 686 N[EXT] View oldest unacknowledged event report Display (or acknowledge if ACK present) event summary with this corresponding number in the HIS E command. TERSE Do not display label headers. Compressed ASCII Commands Date Code 20010625 SEL-311L Instruction Manual...
Page 687 T3Y T2Y T1Y ROKY ROKX ROKB ROKA","yyyy"<CR> ">","yyyyyyyyyyy","yyyy"<CR> "*","yyyyyyyyyyy","yyyy"<CR> <ETX> where: "zzzz" is TRIP or TRIG, depending on event type. If the specified event does not exist, the relay responds: <STX>"No Data Available","067F"<CR><ETX> Date Code 20010625 Compressed ASCII Commands SEL-311L Instruction Manual...
Page 689 OGIC variable timer SV6) TR = … + 51QT * SV6T + … (trip conditions; SV6T is the output of the SEL OGIC control equation variable timer SV6) Date Code 20010625 Setting Negative-Sequence Overcurrent Elements SEL-311L Instruction Manual...
Page 690 This conference paper gives many good application examples for negative-sequence overcurrent elements. The focus is on the transmission system, where negative-sequence overcurrent elements provide better sensitivity than zero-sequence overcurrent elements in detecting some single-line-to-ground faults. Setting Negative-Sequence Overcurrent Elements Date Code 20010625 SEL-311L Instruction Manual...
Page 691 Settings) in Section 10: Line Current Differential Communications and Serial Port Communications and Commands for a list of the factory settings included in a standard shipment of a SEL-311L Relay. ELAY Most of the protection and control element logic outputs shown in the various figures in Section 3 through Section 8 are Relay Word bits (labeled as such in the figures).
Page 692 51PT trip logic (see SEL control equation trip setting TR example later in this OGIC section) 51PR testing (e.g., assign to an output contact for reset indication) ® Setting SEL Control Equations Date Code 20010625 OGIC SEL-311L Instruction Manual...
Page 693 OGIC Operator Logic Function rising edge detect falling edge detect parentheses Operators in a SEL control equation setting are processed in the order shown in Table G.1. OGIC ® Date Code 20010625 Setting SEL Control Equations OGIC SEL-311L Instruction Manual...
Page 694 IN101 is deenergized [IN101 = 0 (logical 0)]: 52A = !IN101 = NOT(IN101) = NOT(0) = 1 Thus, the SEL control equation circuit breaker status setting 52A sees a closed circuit OGIC breaker. ® Setting SEL Control Equations Date Code 20010625 OGIC SEL-311L Instruction Manual...
Page 695 The rising edge operator / is applied to individual Relay Word bits only—not to groups of elements within parentheses. In this example, the SEL control equation event report OGIC generation setting uses rising edge operators: ER = /51P + /51G + /OUT103 ® Date Code 20010625 Setting SEL Control Equations OGIC SEL-311L Instruction Manual...
Page 696 (generated by 51G asserting first). The assertion of OUT103 for a breaker failure condition is some appreciable time later and will generate another event report, if the first event report capture has ended when OUT103 asserts. ® Setting SEL Control Equations Date Code 20010625 OGIC SEL-311L Instruction Manual...
Page 697 Relay Word bits (e.g., TR = 51PT + 51GT + 50P1 * SH0) • directly to logical 1 (e.g., 67P1TC = 1) • directly to logical 0 (e.g., TRCOMM = 0) ® Date Code 20010625 Setting SEL Control Equations OGIC SEL-311L Instruction Manual...
Page 698 SV1. Next use the OGIC resultant SEL control equation variable output (Relay Word bit SV1) in the SEL OGIC OGIC control equation trip setting TR. ® Setting SEL Control Equations Date Code 20010625 OGIC SEL-311L Instruction Manual...
Page 699 OGIC SEL-311L Relay responds with the following message: xxx Elements and yy Edges remain available indicating that “xxx” Relay Word bits can still be used and “yy” rising or falling edge operators can still be applied in the SEL control equations for the particular settings group.
Page 701 DCD indication. This allows RTS to be looped back to CTS in cases where the external transceiver does not support DCD. When the 311L SEL- Date Code 20010625 Distributed Network Protocol (DNP) 3.00 Level 2 SEL-311L Instruction Manual...
Page 702 Table H.1: Data Access Methods Data Retrieval Method Description Relevant SEL-311L Settings Polled Static The master polls for static Set ECLASS = 0, (Class 0) data only.
Page 703 Object Group Request Function Codes Response Function Codes Object Variation Request Qualifiers Response Qualifiers Object Name (optional) Vendor Name: Schweitzer Engineering Laboratories, Inc. Device Name: SEL-311L Highest DNP Level Supported: Device Function: ❒ Master þ Slave For Requests Level 2...
Page 704 Expects Binary Input Change Events: ❒ Either time-tagged or non-time-tagged for a single event ❒ Both time-tagged and non-time-tagged for a single event ❒ Configurable (attach explanation) Distributed Network Protocol (DNP) 3.00 Level 2 Date Code 20010625 SEL-311L Instruction Manual...
Page 705 ❒ Point-by-point list attached ❒ Yes þ No Sends Multi-Fragment Responses: In all cases within the device profile that an item is configurable, it is controlled by SEL-311L Relay settings. BJECT ABLE The supported object, function, and qualifier code combinations are given by the following object table.
Page 706 Counter Change Event—All Variations 6,7,8 32-Bit Counter Change Event without Time 6,7,8 17,28 16-Bit Counter Change Event without Time 6,7,8 129,130 17,28 32-Bit Delta Counter Change Event without Time Distributed Network Protocol (DNP) 3.00 Level 2 Date Code 20010625 SEL-311L Instruction Manual...
Page 707 Frozen Analog Event—All Variations 32-Bit Frozen Analog Event without Time 16-Bit Frozen Analog Event without Time 32-Bit Frozen Analog Event with Time 16-Bit Frozen Analog Event with Time Date Code 20010625 Distributed Network Protocol (DNP) 3.00 Level 2 SEL-311L Instruction Manual...
Page 708 Private Registration Object Descriptor Application Identifier Short Floating Point Long Floating Point Extended Floating Point Small Packed Binary-Coded Decimal Medium Packed Binary-Coded Decimal Large Packed Binary-Coded Decimal No object 13,14,23 Distributed Network Protocol (DNP) 3.00 Level 2 Date Code 20010625 SEL-311L Instruction Manual...
Page 709 Each version of the SEL-311L Relay has a slightly different data map. The following is the default object map supported by the SEL-311L Relay wye-connected PTs (FID = SEL-311L- Rxxx-VM-Dxxxxxxxx). Table H.3: SEL-311L-Wye DNP Data Map DNP Object Type Index...
Page 710 Peak demand IA, IB, IC, IG, and 3I2 magnitudes. 30,32 84–87 A-, B-, C-, and 3-phase peak demand MW in. 30,32 88–91 A-, B-, C-, and 3-phase peak demand MVAR in. H-10 Distributed Network Protocol (DNP) 3.00 Level 2 Date Code 20010625 SEL-311L Instruction Manual...
Page 711 3I2T magnitude and angle. 40,41 Active settings group. Note: For 112 to 147, when values to be returned invalid the value (float), 0x7F800000 will be returned. Date Code 20010625 Distributed Network Protocol (DNP) 3.00 Level 2 H-11 SEL-311L Instruction Manual...
Page 712 Event Cause Trigger command Pulse command Trip element ER element And the lower byte is defined as follows: Value Fault Type Indeterminate A-Phase B-Phase C-Phase Ground H-12 Distributed Network Protocol (DNP) 3.00 Level 2 Date Code 20010625 SEL-311L Instruction Manual...
Page 713 DNP master. All 1025 binaries and 112 analogs may be included in the list, but may occur only once. The maps are stored in nonvolatile memory. The DNP command is only Date Code 20010625 Distributed Network Protocol (DNP) 3.00 Level 2 H-13 SEL-311L Instruction Manual...
Page 714 35 1 56 57 58 59 60 61 62 63 64 65 66 67 100 101 102 \<CR> 103<CR> ==>DNP B Enter the new DNP Binary map <CR> ==> H-14 Distributed Network Protocol (DNP) 3.00 Level 2 Date Code 20010625 SEL-311L Instruction Manual...
Page 715 Number of events to transmit on (1–200) NUMEVE Age of oldest event to force transmit on, seconds (0.0–60.0) AGEEVE Time-out for confirmation of unsolicited message, seconds (0–50) UTIMEO Date Code 20010625 Distributed Network Protocol (DNP) 3.00 Level 2 H-15 SEL-311L Instruction Manual...
Page 717: Appendix I: Mirrored Bits ™ Communications
IRRORED to exchange information quickly and securely, and with minimal expense. The information exchanged can facilitate remote control, remote sensing, or communications-assisted protection schemes such as POTT, DCB, etc. The SEL-311L Relay supports two M channels, IRRORED differentiated by the channel specifiers A and B. Bits transmitted are called TMB1x through TMB8x, where x is the channel specifier (e.g., A or B), and are controlled by the corresponding...
Page 718: Synchronization
So a counter set to two will again delay a bit by about 1/2 cycle. However, in that same example, a security counter set to two on the SEL-311L Relay will delay a bit by 1/4 cycle, because the SEL-311L Relay is receiving new M...
Page 719: Loopback Testing
The relay injects a delay (idle time) between messages. The length of the delay is one relay processing interval. Note: An idle processing interval guarantees at least 19 idle bits at 9600 baud in an SEL-321 Relay with the system frequency at 65 Hz. Date Code 20010625 ™ Communications IRRORED SEL-311L Instruction Manual...
Page 720: Settings
Use the RBADPU setting to determine how long a channel error must last before the relay element RBADA is asserted. RBADA is deasserted when the channel error is corrected. Mirrored Bits Channel bad pickup (1-10000 10E-6) CBADPU= 1000 ™ Communications Date Code 20010625 IRRORED SEL-311L Instruction Manual...
Page 721 RMB8DO= 1 Supervise the transfer of received data (or default data) to RMB1A–RMB8A with the M IRRORED pickup and dropout security counters. Set the pickup and dropout counters individually for each bit. Date Code 20010625 ™ Communications IRRORED SEL-311L Instruction Manual...
Page 723: Appendix J: Example Calculations For 87L Settings
= 0.5, the system twist angle (δ) must be zero, and Sources S and R must have equal strength (where m = per-unit distance from Bus S). How do source impedances, δ, and fault location m effect I Date Code 20010625 Example Calculations for 87L Settings SEL-311L Instruction Manual...
Page 724: Calculating I Ar Al
δ = 10°. If the ∠Z is 10° greater than ∠Z for the fault at m = 0, the non-homogenous system angle and system load angle errors cancel: I and I then in-phase. Example Calculations for 87L Settings Date Code 20010625 SEL-311L Instruction Manual...
Page 725: Calculating I For Ground Faults
Any increase in Alpha plane coverage caused by (E serves to increase the security of the 87L2 and 87LG elements without sacrificing sensitivity. − • • Equation J.4 • • Equation J.5 • Equation J.6 − • Date Code 20010625 Example Calculations for 87L Settings SEL-311L Instruction Manual...
Page 726: Summary
CT saturation (40°) and communication channel asymmetry (22.5°). The sum of these worst-case errors, and assuming that they all occur simultaneously, is 82.5°. Given this analysis, set 87LANG = 195°. Example Calculations for 87L Settings Date Code 20010625 SEL-311L Instruction Manual...
Page 727: Line Charging Current Calculation Examples
@ V = 8.66 kV, I = 60.6 A primary for a 15-mile long cable 1CHARGING @ V = 86.6 V, I = 0.60 A primary for the same cable length 2CHARGING Date Code 20010625 Example Calculations for 87L Settings SEL-311L Instruction Manual...
Page 728: Ground Fault Resistance Coverage With 87L2P = 0.5 A
In both examples, setting 87L2P = 0.5 A secondary allows ground fault resistance coverage up Ω secondary Assumes load current less than 1/3 of nominal secondary current. See Figure 3.8 for ground fault resistance coverage with more load current. Example Calculations for 87L Settings Date Code 20010625 SEL-311L Instruction Manual...
Page 729: Appendix K: Sel-5030 Ac Sel Erator
After installation, the Quick Tour will show how to create a circuit breaker (CB) simulator. The CB simulator is useful for testing and evaluation. Note: Like all SEL relay products, the SEL-311L can also be set and operated by a simple ASCII terminal.
Page 730: Installation
You can start the following ways: ERATOR 1. Double-click the icon if you have a desktop shortcut. ERATOR 2. Choose “Programs | SEL Applications” and select the icon to start the ERATOR program. SEL-5030 Date Code 20011017 ERATOR SEL-311L Instruction Manual...
Page 731 SEL-311L Relay Command Summary Access Level 0 Commands The only thing that can be done at Access level 0 is to go to Access Level 1. The screen prompt is: = Enter Access Level 1. If the main board password jumper is not in place, the relay prompts for entry of the Access Level 1 password in order to enter Access Level 1.
Page 732 Table 6.1 for more information concerning the OPE command. PUL n k Pulse output contact n (OUT101–OUT107, ALARM, OUT201–OUT212) for k (1–30) seconds. Parameter n must be specified; k defaults to 1 if not specified. Command Summary Date Code 20010625 SEL-311L Instruction Manual...
Page 733 If channel (X or Y) is specified a question string will follow to configure the channel for testing. With no channel identifier, the command will return each channel status. Displays version and configuration information. Date Code 20010625 Command Summary SEL-311L Instruction Manual...

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