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Schweitzer Engineering Laboratories SEL-311A Instruction Manual

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SEL-311A

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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Summary of Contents for Schweitzer Engineering Laboratories SEL-311A

Page 1 SEL-311A 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 You may not copy, alter, disassemble, or reverse-engineer the software. You may not provide the software to any third party. 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,...
Page 3 - Updated Event Report Parameters section in the Settings Sheets. - Updated Optoisolated Input Timers section in the Settings Sheets. - Added ELAT and EDP settings in the Other Enable Settings section in the Settings Sheets. Date Code 20011205 Manual Change Information SEL-311A Instruction Manual...
Page 4 Appendix D: - Updated A5C0 Relay Definition Block section. - Updated information in ID Message and DNA Message sections. Appendix G: - Updated SEL-311A-Wye DNP Data Map table. Appendix I: - Added Appendix I: Unsolicited Fast SER Protocol. 20010625 Appendix A: - Modified SEL-311 Relays to record consecutive event reports.
Page 5 - Added Warning statement to change default passwords to private passwords at relay installation. Appendix G: - Updated first row of Table G.3. - Correctly identify binary output point 23 in the Relay Summary Event Data subsection. 20000911 New Manual Release. Date Code 20011205 Manual Change Information SEL-311A Instruction Manual...
Page 7: Section 1: Introduction And Specifications
® Appendix F: Setting SEL Control Equations OGIC Appendix G: Distributed Network Protocol (DNP) 3.00 Appendix H: M ™ Communications IRRORED Appendix I: Unsolicited Fast SER Protocol SEL-311A RELAY COMMAND SUMMARY Date Code 20011205 Table of Contents SEL-311A Instruction Manual...
Page 9: Table Of Contents
General Specifications ......................1-8 Processing Specifications ....................1-10 Relay Element Settings Ranges and Accuracies..............1-11 FIGURES Figure 1.1: SEL-311A Relay Transmission Line Protection with M ™ ......1-4 IRRORED Figure 1.2: SEL-311A Relay Inputs, Outputs, and Communications .............1-5 Figure 1.3: SEL-311A Relay Communications Connections Examples..........1-6 Figure 1.4: SEL-311A Relay Communications Connections Examples (Continued) ......1-7...
Page 11: Introduction And Specifications
General Specifications SEL-311A R ELAY ODELS This instruction manual covers SEL-311A Relay models. A vertical SEL-311A Relay is available. The vertical relays use the same rear panels as the horizontal models. See Figure 2.2 through Figure 2.4. NSTRUCTION ANUAL ECTIONS...
Page 12 SER, text OGIC label, and serial port settings The Settings Sheets can be photocopied and filled out to set the SEL-311A Relay. Note that these sheets correspond to the serial port SET commands listed in Table 9.1.
Page 13 ™ IRRORED · Appendix I: SEL-311A Unsolicited SER Protocol SEL-311A Relay Command Summary briefly describes the serial port commands that are described in detail in Section 10: Serial Port Communications and Commands. Date Code 20011205 Introduction and Specifications SEL-311A Instruction Manual...
Page 14: Applications
PPLICATIONS IRRORED SEL-311A SEL-311A DWG: M311A001 Figure 1.1: SEL-311A Relay Transmission Line Protection with M IRRORED AC/DC C ONNECTIONS See General Specifications later in this section and Section 2: Installation for more information on hardware and connections. Introduction and Specifications...
Page 15: Figure 1.2: Sel-311A Relay Inputs, Outputs, And Communications
See Figure 2.2 through Figure 2.4 for rear-panel drawings. Note: Terminals 41 and 42 are not used in the SEL-311A. Figure 1.2: SEL-311A Relay Inputs, Outputs, and Communications Date Code 20011205 Introduction and Specifications SEL-311A Instruction Manual...
Page 16: Communications Connections
OMMUNICATIONS ONNECTIONS See Port Connector and Communications Cables in Section 10: Serial Port Communications and Commands for more communications connection information. Figure 1.3: SEL-311A Relay Communications Connections Examples Introduction and Specifications Date Code 20011205 SEL-311A Instruction Manual...
Page 17: Figure 1.4: Sel-311A Relay Communications Connections Examples (Continued)
SEL-311A Relay SEL-311A Relay SEL-2800 SEL-2800 SEL-2800 SEL-2505 Transformer Alarms SEL-2800 SEL-2800 SEL-2100 IN101 Relay Protection Logic Processor DWG: M311A004 Figure 1.4: SEL-311A Relay Communications Connections Examples (Continued) Date Code 20011205 Introduction and Specifications SEL-311A Instruction Manual...
Page 18: Relay Specifications
ELAY PECIFICATIONS Important: Do not use the following specification information to order an SEL-311A Relay. Refer to the actual ordering information sheets. General Specifications Terminal Connections: Rear Screw-Terminal Tightening Torque Terminal Block Minimum: 8-in-lb (0.9 Nm) Maximum: 12-in-lb (1.4 Nm) ®...
Page 19 Relay accepts demodulated IRIG-B time-code input at Port 2. Time-Code Input: Relay time is synchronized to within ±5 ms of time-source input. Operating Temperature Range: -40° to +85°C (-40° to +185°F) Note: LCD contrast impaired for temperatures below -20°C. Date Code 20011205 Introduction and Specifications SEL-311A Instruction Manual...
Page 20: Processing Specifications
One cycle cosine after low-pass analog filtering. Net filtering (analog plus digital) rejects dc and all harmonics greater than the fundamental. Protection and Control Processing 4 times per power system cycle. 1-10 Introduction and Specifications Date Code 20011205 SEL-311A Instruction Manual...
Page 21: Relay Element Settings Ranges And Accuracies
±0.01 A and ±3% of setting (1 A nominal) Transient Overreach: < 5% of pickup Max. Operating Time: See pickup and reset time curves in Figure 3.11 and Figure 3.12 Date Code 20011205 Introduction and Specifications 1-11 SEL-311A Instruction Manual...
Page 22 Time Dial Range: 0.50–15.00, 0.01 steps (US) 0.05–1.00, 0.01 steps (IEC) Curve Timing Accuracy: ±1.50 cycles and ±4% of curve time for current between 2 and 30 multiples of pickup 1-12 Introduction and Specifications Date Code 20011205 SEL-311A Instruction Manual...
Page 23 EIA-232 Serial Port Voltage Jumpers.................2-13 Clock Battery ........................2-14 TABLES Table 2.1: Communication Cables to Connect the SEL-311A Relay to Other Devices ......2-7 Table 2.2: Move Jumper JMP23 to Select Extra Alarm.................2-12 Table 2.3: Password and Breaker Jumper Operation................2-13 Table 2.4: EIA-232 Serial Port Voltage Jumper Positions for Standard Relay Shipments....2-14 FIGURES Figure 2.1: SEL-311A Relay Dimensions and Panel-Mount Cutout ............2-1...
Page 25: Section 2: Installation
SECTION 2: INSTALLATION ELAY OUNTING Figure 2.1: SEL-311A Relay Dimensions and Panel-Mount Cutout Date Code 20011205 Installation SEL-311A Instruction Manual...
Page 26: Front- And Rear-Panel Diagrams
RONT ANEL IAGRAMS Figure 2.2: SEL-311A Relay Front- and Rear-Panel Drawings (Horizontal) Installation Date Code 20011205 SEL-311A Instruction Manual...
Page 27 Figure 2.3: SEL-311A Relay Front- and Rear-Panel Drawings (Vertical) Date Code 20011205 Installation SEL-311A Instruction Manual...
Page 28: Figure 2.4: Sel-311A Relay Connectorized ® Rear-Panel Drawing
® Figure 2.4: SEL-311A Relay Connectorized Rear-Panel Drawing Installation Date Code 20011205 SEL-311A Instruction Manual...
Page 29: Making Rear-Panel Connections
Standard output contacts are not polarity dependent. Optoisolated Inputs The optoisolated inputs in any of the SEL-311A Relay models (e.g., IN102) are not polarity dependent. With nominal control voltage applied, each optoisolated input draws approximately 4 mA of current. Refer to General Specifications in Section 1: Introduction and Specifications for optoisolated input ratings.
Page 30: Potential Transformer Inputs
All ports are independent—you can communicate to any combination simultaneously. Serial Port 1 on all the SEL-311A 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 31: Table 2.1: Communication Cables To Connect The Sel-311A Relay To Other Devices
A demodulated IRIG-B time code can be input into Serial Port 2 on any of the SEL-311A Relay models (see Table 10.1) by connecting Serial Port 2 of the SEL-311A Relay to an SEL-2020 with Cable C273A.
Page 32: Figure 2.5: Sel-311A Relay Provides Distance And Overcurrent Protection For A Transmission Line
ARIOUS PPLICATIONS Current Channel IP does not need to be connected. Channel IP provides current for current polarized directional elements. Figure 2.5: SEL-311A Relay Provides Distance and Overcurrent Protection for a Transmission Line Installation Date Code 20011205 SEL-311A Instruction Manual...
Page 33 In this example, current Channel IP provides current polarization for a directional element used to control ground elements. Figure 2.6: SEL-311A Relay Provides Distance and Overcurrent Protection for a Transmission Line (Current Polarization Source Connected to Channel IP) Date Code 20011205...
Page 34: Circuit Board Connections
Each circuit board corresponds to a row of rear-panel terminal blocks or connectors and is affixed to a drawout tray. The SEL-311A Relay has only a main board. Disconnect circuit board cables as necessary to allow the main board and drawout tray to be removed.
Page 35: Figure 2.7: Jumper, Connector, And Major Component Locations On The Sel-311A Relay Main Board
Figure 2.7: Jumper, Connector, and Major Component Locations on the SEL-311A Relay Main Board Date Code 20011205 Installation 2-11 SEL-311A Instruction Manual...
Page 36: Output Contact Jumpers
“Extra Alarm” Output Contact Control Jumper All the SEL-311A Relays have dedicated alarm output contacts (labeled ALARM—see Figure 2.2 and Figure 2.3). Often more than one alarm output contact is needed for such applications as local or remote annunciation, backup schemes, etc.
Page 37: Password And Breaker Jumpers
Pin 1 on the corresponding EIA-232 serial ports. Put the jumpers “ON” (in place) so that the +5 Vdc is connected to Pin 1 on the corresponding EIA-232 serial ports. Date Code 20011205 Installation 2-13 SEL-311A Instruction Manual...
Page 38: Clock Battery
(+) of the battery faces up. Reassemble the relay as described in Accessing the Relay Circuit Boards. Set the relay date and time via serial communications port or front panel (see Section 10: Serial Port Communications and Commands or Section 11: Front-Panel Interface). 2-14 Installation Date Code 20011205 SEL-311A Instruction Manual...
Page 39 Figure 3.8: Ground and Phase Distance Speed Curves .................3-12 Figure 3.9: Zone Timing Elements .......................3-14 Figure 3.10: Phase Instantaneous/Definite-Time Overcurrent Elements ..........3-15 Figure 3.11: SEL-311A Relay Nondirectional Instantaneous Overcurrent Element Pickup Time Curve ..........................3-17 Figure 3.12: SEL-311A Relay Nondirectional Instantaneous Overcurrent Element Reset Time Curve ..........................3-17...
Page 41: Section 3: Distance And Overcurrent Elements
LEMENTS Phase Distance Elements The SEL-311A Relay has two 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. The phase distance elements use positive-sequence voltage polarization for security and to create an expanded mho characteristic.
Page 42 In the compensator distance three-phase element, the polarizing voltage is (-jV - 0.25 • V mem) and the line drop compensated voltage is (V - Z • I Distance and Overcurrent Elements Date Code 20011205 SEL-311A Instruction Manual...
Page 43 I • X cos (q) > 0 (Z • I - V) Vmem I • R I • Z source M311B034 Forward Internal Fault Figure 3.1: Positive-Sequence Polarized Mho Element Date Code 20011205 Distance and Overcurrent Elements SEL-311A Instruction Manual...
Page 44 (q) > 0 sin (q) < 0 Fault Near Balance Point Internal Fault Note: V , and V are internal element voltages, not system voltages. M311B035 Figure 3.2: Compensator-Distance Phase-to-Phase Element Operation Distance and Overcurrent Elements Date Code 20011205 SEL-311A Instruction Manual...
Page 45 Calculate the total primary impedance as the sum of the per-unit transformer and line impedances, then convert from per-unit to actual primary impedance at the protected bus voltage. The Date Code 20011205 Distance and Overcurrent Elements SEL-311A Instruction Manual...
Page 46 ±0.01 A and ±3% of setting (1 A nominal) Transient Overreach: < 5% of pickup Max. Operating Time: See pickup and reset time curves in Figure 3.11 and Figure 3.12. Distance and Overcurrent Elements Date Code 20011205 SEL-311A Instruction Manual...
Page 47 Zone 1 extension, if active, is included in this calculation. DWG: M311A048a From Figure 4.14 ƒ From Figure 4.2 ‚ From Figure 4.15 „ From Figure 4.1 Figure 3.4: Zone 1 Phase Distance Logic Date Code 20011205 Distance and Overcurrent Elements SEL-311A Instruction Manual...
Page 48: Ground Distance Elements
Figure 3.5: Zone 2 Phase Distance Logic Ground Distance Elements The SEL-311A Relay has two independent zones of mho ground distance protection. All zones are independently set. Zones 1 and 2 are forward direction only. The mho ground distance elements use positive-sequence voltage polarization for security and to create an expanded mho characteristic.
Page 49 = -180.0 to +180.0 degrees (Zone 1) k0A = -180.0 to +180.0 degrees (Zone 2, 3, 4 advanced setting hidden and set to k0A1 when EADVS = N) Ð Ð Ð where Ð • 3 Date Code 20011205 Distance and Overcurrent Elements SEL-311A Instruction Manual...
Page 50 Z1MG = Zone 1 Distance Setting DWG: M311A009a From Figure 4.12 ƒ From Figure 5.3 ‚ From Figure 4.2 „ From Figure 4.1 Figure 3.6: Zone 1 Mho Ground Distance Logic 3-10 Distance and Overcurrent Elements Date Code 20011205 SEL-311A Instruction Manual...
Page 51: Distance Element Operating Time Curves At Nominal Frequency
Figure 3.7: Zone 2 Mho Ground Distance Logic Distance Element Operating Time Curves at Nominal Frequency Figure 3.8 shows operating times for the SEL-311A Relay distance elements. The diagrams show operating times at each test point. Operating times include output contact closure time.
Page 52: Additional Distance Element Supervision
Fault Location in Percent of Set Reach Figure 3.8: Ground and Phase Distance Speed Curves Additional Distance Element Supervision The SEL-311A uses Relay Word bit VPOLV for positive-sequence memory supervision of mho characteristics. VPOLV asserts when the memorized positive-sequence polarizing voltage is greater than 1 Volt.
Page 53: Zone Time Delay Elements
AB, and CA are blocked. Zone Time Delay Elements The SEL-311A Relay supports two philosophies of zone timing: independent or common timing (see Figure 3.9). 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 54 Z2GT Zone 2 Delay Timer Logic DWG: M311A011a From Figure 3.4 ƒ From Figure 3.5 ‚ From Figure 3.6 „ From Figure 3.7 Figure 3.9: Zone Timing Elements 3-14 Distance and Overcurrent Elements Date Code 20011205 SEL-311A Instruction Manual...
Page 55: Phase Instantaneous/Definite-Time Overcurrent Elements
Enabled Levels |IA| 50P1P Relay (Setting) Word Bits |IB| 50P1 E50P = Y (Setting) 67P1 |IC| 67P1D 67P1TC 67P1T (SEL OGIC DWG: M311A012 Figure 3.10: Phase Instantaneous/Definite-Time Overcurrent Elements Date Code 20011205 Distance and Overcurrent Elements 3-15 SEL-311A Instruction Manual...
Page 56 Figure 3.11 and Figure 3.12 show pickup and reset time curves applicable to all nondirectional instantaneous overcurrent elements in the SEL-311A 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 57 Maximum Minimum Applied Current (Multiples of Pickup Setting) Figure 3.11: SEL-311A Relay Nondirectional Instantaneous Overcurrent Element Pickup Time Curve Maximum Minimum Applied Current (Multiples of Pickup Setting) Figure 3.12: SEL-311A Relay Nondirectional Instantaneous Overcurrent Element Reset Time Curve Residual Ground Instantaneous/Definite-Time Overcurrent Elements One residual ground instantaneous/definite-time overcurrent element is available.
Page 58 ±0.01 A secondary and ±3% of setting (1 A nominal phase current inputs, IA, IB, IC) ±0.25 cycles and ±0.1% of setting Timer: ±5% of setting Transient Overreach: Pickup and Reset Time Curves See Figure 3.11 and Figure 3.12. 3-18 Distance and Overcurrent Elements Date Code 20011205 SEL-311A Instruction Manual...
Page 59: Phase Time-Overcurrent Elements
Note: SEL control equation torque control settings (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 20011205 Distance and Overcurrent Elements 3-19 SEL-311A Instruction Manual...
Page 60 ±1.50 cycles and ±4% of curve time for currents between (and including) Curve Timing: 2 and 30 multiples of pickup 51PT Element Logic Outputs The logic outputs in Figure 3.14 are the Relay Word bits shown in Table 3.4. 3-20 Distance and Overcurrent Elements Date Code 20011205 SEL-311A Instruction Manual...
Page 61 (not yet fully reset) = 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 20011205 Distance and Overcurrent Elements 3-21 SEL-311A Instruction Manual...
Page 62 Other SEL control equation torque control settings may be set to provide directional control. OGIC See Overcurrent Directional Control Provided by Torque Control Settings at the end of 3-22 Distance and Overcurrent Elements Date Code 20011205 SEL-311A Instruction Manual...
Page 63: Residual Ground Time-Overcurrent Element
To understand the operation of Figure 3.15, follow the explanation given for Figure 3.14 in the preceding 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 20011205 Distance and Overcurrent Elements 3-23 SEL-311A Instruction Manual...
Page 64 Note: SEL control equation torque control settings (e.g., 51GTC) cannot be set directly to OGIC logical 0. See Section 9: Setting the Relay for additional time-overcurrent element settings information. 3-24 Distance and Overcurrent Elements Date Code 20011205 SEL-311A Instruction Manual...
Page 65: Curve
±0.01 A secondary and ±3% of setting (1 A nominal phase current inputs, IA, IB, IC) ±1.50 cycles and ±4% of curve time for currents between (and including) 2 and Curve Timing: 30 multiples of pickup Date Code 20011205 Distance and Overcurrent Elements 3-25 SEL-311A Instruction Manual...
Page 67 Settings Ranges ........................4-5 Load-Encroachment Setting Example...................4-5 Convert Power Factors to Equivalent Load Angles ..............4-6 Use SEL-321 Relay Application Guide for the SEL-311A Relay ........4-8 Directional Control for Ground Distance and Residual Ground Overcurrent Elements....4-8 Directional Element Enables....................4-10 Best Choice Ground Directional™ Logic................4-10 Directional Elements......................4-10...
Page 68 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 20011205 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 69: Section 4: Loss-Of-Potential, Ccvt Transient Detection, Load-Encroachment, And Directional Element Logic
(V secondary) zero-sequence current (A secondary) The circuit breaker has to be closed (Relay Word bit 3PO = logical 0) for the LOP logic to operate. Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 70: Setting Elop = Y Or Y1
ETECTION OGIC The SEL-311A detects CCVT transients that may cause Zone 1 distance overreach. If CCVT transient blocking is enabled (setting ECCVT = Y), and the relay detects a high SIR during a Zone 1 fault, the relay delays tripping for up to 1.5 cycles, allowing the CCVT to stabilize.
Page 71: Load-Encroachment Logic
The distance elements, M1P and M2P, will not operate without directional control. Set !ZLOAD in the phase overcurrent torque control equation to block phase overcurrent operation. Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 72 Forward load (load flowing out) lies within the hatched region labeled ZLOUT. Relay Word bit ZLOUT asserts to logical 1 when the load lies within this hatched region. Loss-of-Potential, CCVT Transient Detection, Date Code 20011205 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 73: Settings Ranges
132.8 kV • (1000 V/kV) = 132800 V primary 132800 V primary • (1/PT ratio) = 132800 V primary • (1 V secondary/2000 V primary) = 66.4 V secondary Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 74: Convert Power Factors To Equivalent Load Angles
Setting NLAR = 180° + cos (0.95) = 180° + 18° = 198° Apply Load-Encroachment Logic to a Phase Time-Overcurrent Again, from Figure 4.3: ZLOAD = ZLOUT + ZLIN Loss-of-Potential, CCVT Transient Detection, Date Code 20011205 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 75 For a fault condition (ZLOAD = logical 0), phase time-overcurrent element 51PT can operate: 51PTC = !ZLOAD = !(logical 0) = NOT(logical 0) = logical 1 Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 76: Use Sel-321 Relay Application Guide For The Sel-311A Relay
Use SEL-321 Relay Application Guide for the SEL-311A Relay The load-encroachment logic and settings in the SEL-311A 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-311A Relay.
Page 77 The order in which these directional elements are listed in setting ORDER determines the priority in which they operate to provide Best Choice Ground Directional™ logic control. See discussion on setting ORDER in the following subsection Directional Control Settings. Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 78: Directional Element Enables
Refer to Figure 4.1 and accompanying text for more information on loss-of-potential. Directional Element Routing Refer to Figure 4.5 and Figure 4.12. The directional element outputs are routed to the forward Relay Word bit 32GF. 4-10 Loss-of-Potential, CCVT Transient Detection, Date Code 20011205 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 79 Refer to Figure 4.1 and accompanying text for more information on loss-of-potential. As shown in Figure 3.6 and Figure 3.7, ILOP also disables all ground distance elements. Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, 4-11 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 80 ƒ To Figure 4.14 ‚ To Figure 4.9 „ To Figure 4.8 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 20011205 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 81 ‚ To Figure 4.11 „ To Figure 4.8 Figure 4.7: Internal Enables (32VE and 32IE) Logic for Zero-Sequence Voltage-Polarized and Channel IP Current-Polarized Directional Elements Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, 4-13 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 82 From Figure 4.6 „ Figure 4.10 ‚ From Figure 4.7 … Figure 4.11 ƒ Figure 4.9 Figure 4.8: Best Choice Ground Directional Logic 4-14 Loss-of-Potential, CCVT Transient Detection, Date Code 20011205 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 83 ƒ From Figure 4.8 ‚ From Figure 4.1 „ To Figure 4.12 Figure 4.9: Negative-Sequence Voltage-Polarized Directional Element for Ground Distance and Residual Ground Overcurrent Elements Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, 4-15 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 84 ƒ From Figure 4.8 ‚ From Figure 4.1 „ To Figure 4.12 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 20011205 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 85 † To Figure 3.6, Figure 3.7 ƒ From Figure 4.9 and Figure 3.13 „ From Figure 4.10 Figure 4.12: Ground Distance and Residual Ground Directional Logic Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, 4-17 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 86: Internal Enables
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 20011205 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 87: Directional Elements
Refer to Figure 4.1 and accompanying text for more information on loss-of-potential. As shown in Figure 3.4 and Figure 3.5, ILOP also disables all phase distance elements. Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, 4-19 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 88 From Figure 4.6 ƒ From Figure 3.4 and Figure 3.5 ‚ From Figure 4.1 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 20011205 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 89: Directional Control Settings
Once these settings are calculated automatically, they can only be modified if the user goes back and changes the directional control enable setting to E32 = Y. Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, 4-21 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 90 (V = zero-sequence voltage-polarized directional element; see Figure 4.10) provides directional control for the ground distance and residual ground overcurrent elements. Another example, if setting: ORDER = V 4-22 Loss-of-Potential, CCVT Transient Detection, Date Code 20011205 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 91 50QFP = 0.50 A secondary (5 A nominal phase current inputs, IA, IB, IC) 50QFP = 0.10 A secondary (1 A nominal phase current inputs, IA, IB, IC) Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, 4-23 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 92 32IE enable for the channel IP current-polarized directional element that controls the ground distance and residual ground overcurrent elements 4-24 Loss-of-Potential, CCVT Transient Detection, Date Code 20011205 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 93 If preceding setting ORDER does not contain V or I (no zero-sequence voltage-polarized or channel IP current-polarized directional elements are enabled), then setting a0 is not made or displayed. Refer to Figure 4.7. Date Code 20011205 Loss-of-Potential, CCVT Transient Detection, 4-25 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 94 Most often, this setting is set directly to logical 1: E32IV = 1 (numeral 1) 4-26 Loss-of-Potential, CCVT Transient Detection, Date Code 20011205 Load-Encroachment, and Directional Element Logic SEL-311A Instruction Manual...
Page 95 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-311A Relay: E32IV = IN106 (52a connected to optoisolated input IN106) Almost any desired control can be set in SEL control equation setting E32IV.
Page 97 Front-Panel Target LEDs......................5-10 Additional Target LED Information ...................5-10 Target Reset/Lamp Test Front-Panel Pushbutton...............5-12 TABLES Table 5.1: SEL-311A Relay Front-Panel Target LED Definitions ............5-10 FIGURES Figure 5.1: Trip Logic ..........................5-2 Figure 5.2: Minimum Trip Duration Timer Operation (See Bottom of Figure 5.1) .......5-3 Figure 5.3: Three-Pole Open Logic (Top) and Switch-Onto-Fault Logic (Bottom).......5-7...
Page 99: Section 5: Trip And Target Logic
TR is set with direction forward underreaching Zone 1 distance elements and other time delayed elements (e.g., Zone 2 definite-time distance elements), and TRSOTF is set with instantaneous directional and non-directional elements. Date Code 20011205 Trip and Target Logic SEL-311A Instruction Manual...
Page 100: Set Trip
Word bit TRIP remains asserted at logical 1 for as long as the output of OR-1 gate remains at logical 1, regardless of other trip logic conditions. The Minimum Trip Duration Timer can be set no less than 4 cycles. Trip and Target Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 101: Unlatch Trip
One of the following occurs: control equation setting ULTR asserts to logical 1, OGIC The front-panel TARGET RESET button is pressed, Or the TAR R (Target Reset) command is executed via the serial port. Date Code 20011205 Trip and Target Logic SEL-311A Instruction Manual...
Page 102: Factory Settings Example (Using Setting Tr)
With setting TDURD = 9.000 cycles, once the TRIP Relay Word bit asserts via SEL control OGIC equation setting TR, it remains asserted at logical 1 for a minimum of 9 cycles. Trip and Target Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 103: Additional Settings Examples
In the factory settings, the resultant of the trip logic in Figure 5.1 is routed to output contacts OUT101 and OUT102 with the following SEL control equation settings: OGIC OUT101 = TRIP OUT102 = TRIP Date Code 20011205 Trip and Target Logic SEL-311A Instruction Manual...
Page 104: Switch-Onto-Fault (Sotf) Trip Logic
TRSOTF (e.g., TRSOTF = 50P2) to trip after the circuit breaker closes. Figure 5.3 and the following discussion describe the three-pole open (3PO) logic and the SOTF logic. Trip and Target Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 105: Three-Pole Open Logic
Circuit breaker status (52A = logical 0) · Positive-sequence voltage (|V1| < 27PO) Select OPO = 52 if 3PO is determined by circuit breaker status. Select OPO = 27 if 3PO is determined by positive-sequence voltage. Date Code 20011205 Trip and Target Logic SEL-311A Instruction Manual...
Page 106: 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-311A Relay and OPO = 52, control equation setting 52A may be set: OGIC...
Page 107: 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-311A Relay (e.g., IN105) to the dc close bus. When a manual close or automatic reclosure occurs, optoisolated input IN105 is energized. SEL...
Page 108: Additional Target Led Information
- - - - P RONT ANEL ARGET Table 5.1: SEL-311A Relay Front-Panel Target LED Definitions Number Label Definition Relay Enabled—see subsection Relay Self-Tests in Section 13: Testing and Troubleshooting TRIP Indication that a trip occurred, by a protection or control element...
Page 109 The SOTF target LED illuminates at the rising edge of the TRIP Relay Word bit if the trip is the result of the SEL control equation setting TRSOTF and associated switch-onto-fault trip OGIC logic (see Figure 5.3). Date Code 20011205 Trip and Target Logic 5-11 SEL-311A Instruction Manual...
Page 110: Target Reset/Lamp Test Front-Panel Pushbutton
All front-panel LEDs illuminate for one (1) second. · All latched target LEDs (target LEDs numbered 2 through 5 and 7 through 16 in Table 5.1) are extinguished (unlatched). 5-12 Trip and Target Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 111 (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 20011205 Trip and Target Logic 5-13 SEL-311A Instruction Manual...
Page 113 Close Logic ...........................6-1 Set Close ..........................6-2 Unlatch Close........................6-2 Factory Settings Example .....................6-2 Defeat the Close Logic......................6-3 Circuit Breaker Status ......................6-3 Program an Output Contact for Closing ................6-4 FIGURES Figure 6.1: Close Logic...........................6-1 Date Code 20011205 Close Logic SEL-311A Instruction Manual...
Page 115: Section 6: Close Logic
(unlatch close conditions, other than circuit breaker status, or close failure) and setting: (Close Failure Time) See the settings sheet in Section 9: Setting the Relay for setting ranges. Figure 6.1: Close Logic Date Code 20011205 Close Logic SEL-311A Instruction Manual...
Page 116: Set Close
ULCL = TRIP The factory setting for the Close Failure Timer setting is: = 60.00 cycles See the settings sheets at the end of Section 9: Setting the Relay for setting ranges. Close Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 117: Defeat The Close Logic
DP2: DP2 = IN101 This can be entered instead as: DP2 = 52A (presuming SEL control equation setting 52A = IN101 is made). OGIC Date Code 20011205 Close Logic SEL-311A Instruction Manual...
Page 118: Program An Output Contact For Closing
In the factory settings, the resultant of the close logic in Figure 6.1 is routed to output contact 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 Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 119 Operation of Output Contacts for Different Output Contact Types ........7-33 Rotating Default Display (Only on Models with LCD) .............7-35 Traditional Indicating Panel Lights ..................7-35 Traditional Indicating Panel Lights Replaced with Rotating Default Display ....7-35 Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic SEL-311A Instruction Manual...
Page 120 Figure 7.15: Time Line for Reset of Latch Bit LT2 After Active Setting Group Change......7-17 Figure 7.16: Latch Control Switch (with Time Delay Feedback) Controlled by a Single Input to Enable/Disable Circuit Breaker Closing ..............7-18 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 121 Figure 7.26: Logic Flow for Example Output Contact Operation ............7-34 Figure 7.27: Traditional Panel Light Installations ..................7-35 Figure 7.28: Rotating Default Display Replaces Traditional Panel Light Installations ......7-36 Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic SEL-311A Instruction Manual...
Page 123: Section 7: Inputs, Outputs, Timers, And Other Control Logic
Figure 7.1 shows the resultant Relay Word bits that follow corresponding optoisolated inputs for the different SEL-311A Relay models. The figures show 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 1.2 and Figures 2.2 and 2.3).
Page 124: Input Debounce Timers
If more than 2 cycles of debounce are needed, run Relay Word bit INn (n = 101 through 106) through a SEL control equation variable timer and use the output of the timer for input OGIC functions (see Figure 7.23 and Figure 7.24). Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 125: 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 Logic for more information on SEL control equation OGIC setting 52A. Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic SEL-311A Instruction Manual...
Page 126 CL. OGIC 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 20011205 SEL-311A Instruction Manual...
Page 127: Local Control Switches
Note: On SEL-311A Relays without an LCD, the Relay Word bits LB1–LB16 are always = logical 0. (Local bit control is not possible because there are no front-panel buttons or display on the relay.)
Page 128: 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 20011205 SEL-311A Instruction Manual...
Page 129 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 20011205 Inputs, Outputs, Timers, and Other Control Logic SEL-311A Instruction Manual...
Page 130: Settings Examples
(see Figure 5.1 OGIC in Section 5: Trip and Target Logic): TR = ... + LB3 + ... Figure 7.8: Configured Manual Close Switch Drives Local Bit LB4 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 131: Additional Local Control Switch Application Ideas
If a local control switch is made newly operable because of a settings change (i.e., the corresponding label settings are set), the corresponding local bit starts out at logical 0. Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic SEL-311A Instruction Manual...
Page 132: Remote Control Switches
Also, remote bits can be used much as optoisolated inputs are used in operating latch control switches (see discussion following Figure 7.14). Pulse (momentarily operate) the remote bits for this application. 7-10 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 133: Remote Bit States Not Retained When Power Is Lost
The latch control switch feature of this relay replaces latching relays. Traditional latching relays maintain their output contact state when set. The SEL-311A 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 134 Figure 7.10: Traditional Latching Relay The sixteen (16) latch control switches in the SEL-311A 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 135: Latch Control Switch Application Ideas
Latch control switches can be applied to almost any control scheme. The following is an example of using a latch control switch to enable/disable the circuit breaker closing in the SEL-311A Relay. This is used to prevent the circuit breaker from being closed remotely during line or breaker maintenance.
Page 136 The rising edge operator on input IN104 is necessary because any single assertion of optoisolated input IN104 by the pushbutton contact will last for at least a few cycles, and each individual 7-14 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 137 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 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-15 SEL-311A Instruction Manual...
Page 138: Latch Control Switch States Retained
If individual settings are changed for a setting group other than the active setting group, there is no interruption of the latch bits (the relay is not momentarily disabled). 7-16 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 139: Reset Latch Bits For Active Setting Group Change
The nonvolatile memory is rated for a finite number of “writes” for all cumulative latch bit state changes. Exceeding the limit can result in an Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-17 SEL-311A Instruction Manual...
Page 140 LT1 from being able to be changed at a rate faster than once every 300 cycles (5 seconds). Figure 7.16: Latch Control Switch (with Time Delay Feedback) Controlled by a Single Input to Enable/Disable Circuit Breaker Closing 7-18 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 141 Figure 7.17: Latch Control Switch (with Time Delay Feedback) Operation Time Line Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-19 SEL-311A Instruction Manual...
Page 142: Multiple Setting Groups
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 20011205 SEL-311A Instruction Manual...
Page 143: Operation Of Sel Ogic ® Control Equation Settings Ss1 Through Ss6
See Section 10: 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 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-21 SEL-311A Instruction Manual...
Page 144: 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-311A 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 145 SCADA contact (and subsequent assertion of input IN105). The functions of the control equations in Table 7.5 are explained in the following example. OGIC Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-23 SEL-311A Instruction Manual...
Page 146 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 20011205 SEL-311A Instruction Manual...
Page 147: 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 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-25 SEL-311A Instruction Manual...
Page 148 The SEL-311A Relay can be programmed to operate similarly. Use three optoisolated inputs to switch between the six setting groups in the SEL-311A 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 149 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 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-27 SEL-311A Instruction Manual...
Page 150: 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 20011205 SEL-311A Instruction Manual...
Page 151: 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 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-29 SEL-311A Instruction Manual...
Page 152: 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 20011205 SEL-311A Instruction Manual...
Page 153: 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 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-31 SEL-311A Instruction Manual...
Page 154: Additional Settings Example 2
OGIC PULSE command execution The output contact Relay Word bits in turn control the output contacts. Alarm logic/circuitry controls the ALARM output contact (see Figure 7.26). 7-32 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 155: Factory Settings Example
A “b” type output contact is closed when the output contact coil is deenergized and open when the output contact coil is energized. Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-33 SEL-311A Instruction Manual...
Page 156 Contact Jumpers in Section 2: Installation for output contact type options. Table 2.2 ‚ Table 2.3 Figure 7.26: Logic Flow for Example Output Contact Operation 7-34 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 157: Rotating Default Display (Only On Models With Lcd)
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-311A Relay is used. Figure 7.28 shows the elimination of the indicating panel lights by using the rotating default display.
Page 158 Figure 7.28: Rotating Default Display Replaces Traditional Panel Light Installations There are sixteen (16) of these default displays available in the SEL-311A Relay. Each default display has two complementary screens (e.g., BREAKER CLOSED and BREAKER OPEN) available. General Operation of Rotating Default Display Settings The display settings are enabled using the EDP setting.
Page 159 Circuit Breaker Closed In Figure 7.28, optoisolated input IN101 is energized when the 52a circuit breaker auxiliary contact is closed, resulting in: DP2 = IN101 = logical 1 Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-37 SEL-311A Instruction Manual...
Page 160 DP2 = IN101 = logical 1 This results in the display of corresponding text setting DP2_1 on the front-panel display: BREAKER CLOSED 7-38 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 161 0 (logical 0) or 1 (logical 1) and the corresponding text setting. For example, if an SEL-311A Relay is protecting a 230 kV transmission line, labeled “Line 1204,” the line name can be continually displayed with the following settings...
Page 162 This results in the display of corresponding text setting DP1_0 on the front-panel display: 52 CLS DISABLED Now the active setting group is switched from setting Group 1 to 4. 7-40 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 163 DP1 = 0 (logical 0). OGIC The calculations for the remaining time-overcurrent elements are similar, except for 51GP which is multiplied by the CTRP setting. Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-41 SEL-311A Instruction Manual...
Page 164 (;) character. The label character count is the sum of the characters used in the pre and post labels. · ABCDE is a relay setting variable from the table below. 7-42 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 165 º negative-sequence voltage x x . x x x A megawatts x x . x x x B megawatts x x . x x x C megawatts Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-43 SEL-311A Instruction Manual...
Page 166 = x . x x x A peak megawatts out MWBDO MW B D E M = x . x x x B demand megawatts out 7-44 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 167 This example demonstrates use of the rotating display to show metering quantities automatically on the rotating default display. This example will set the MW3, MVAR3, PF3, and FREQ to display in the rotating default display. Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-45 SEL-311A Instruction Manual...
Page 168 WEARB W E A R y y y % B phase wear monitor WEARC W E A R y y y % C phase wear monitor 7-46 Inputs, Outputs, Timers, and Other Control Logic Date Code 20011205 SEL-311A Instruction Manual...
Page 169 With the relay set as shown above, the LCD will show the following: EXT TRIPS=XXXXX CTRL TRIPS=XXXXX then, CTRL IA=XXXXXX kA EXT IA=XXXXXX kA and then, WEAR A= XXX % Date Code 20011205 Inputs, Outputs, Timers, and Other Control Logic 7-47 SEL-311A Instruction Manual...
Page 171 Table 8.3: Demand Meter Settings and Settings Range .................8-23 FIGURES Figure 8.1: Plotted Breaker Maintenance Points for an Example Circuit Breaker .........8-3 Figure 8.2: SEL-311A 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...
Page 172 Figure 8.12: Current I Applied to Parallel RC Circuit ................8-21 Figure 8.13: Demand Current Logic Outputs ..................8-24 Figure 8.14: Raise Pickup of Residual Ground Time-Overcurrent Element for Unbalance Current ..8-25 Breaker Monitor and Metering Functions Date Code 20011205 SEL-311A Instruction Manual...
Page 173: Section 8: Breaker Monitor And Metering Functions
This section explains these functions in detail. REAKER ONITOR The breaker monitor in the SEL-311A 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 Settings Sheet 13 at the end of...
Page 174 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-311A Relay breaker monitor, three set points are entered: Set Point 1 maximum number of close/open operations with corresponding current interruption level.
Page 175 Figure 8.1: Plotted Breaker Maintenance Points for an Example Circuit Breaker Date Code 20011205 Breaker Monitor and Metering Functions SEL-311A Instruction Manual...
Page 176: 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 20011205 SEL-311A Instruction Manual...
Page 177 Figure 8.2: SEL-311A Relay Breaker Maintenance Curve for an Example Circuit Breaker Date Code 20011205 Breaker Monitor and Metering Functions SEL-311A Instruction Manual...
Page 178: Breaker Monitor Operation Example
As stated earlier, each phase (A, B, and C) has its own breaker maintenance curve. For this example, presume that the interrupted current values occur on a single phase in Figure 8.4 Breaker Monitor and Metering Functions Date Code 20011205 SEL-311A Instruction Manual...
Page 179 (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 20011205 Breaker Monitor and Metering Functions SEL-311A Instruction Manual...
Page 180 Figure 8.4: Breaker Monitor Accumulates 10 Percent Wear Breaker Monitor and Metering Functions Date Code 20011205 SEL-311A Instruction Manual...
Page 181 Figure 8.5: Breaker Monitor Accumulates 25 Percent Wear Date Code 20011205 Breaker Monitor and Metering Functions SEL-311A Instruction Manual...
Page 182 Figure 8.6: Breaker Monitor Accumulates 50 Percent Wear 8-10 Breaker Monitor and Metering Functions Date Code 20011205 SEL-311A Instruction Manual...
Page 183 Figure 8.7: Breaker Monitor Accumulates 100 Percent Wear Date Code 20011205 Breaker Monitor and Metering Functions 8-11 SEL-311A Instruction Manual...
Page 184: 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 20011205 SEL-311A Instruction Manual...
Page 185: 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 OUT101, an external control switch, or some other external trip, then IN106 is asserted. Date Code 20011205 Breaker Monitor and Metering Functions 8-13 SEL-311A Instruction Manual...
Page 186: Station Dc Battery Monitor
ATTERY ONITOR The station dc battery monitor in the SEL-311A 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 1.2).
Page 187: Dc Under- And Overvoltage Elements
OFF, 20 to 300 Vdc, 1 Vdc increments This range allows the SEL-311A Relay to monitor nominal battery voltages of 24, 48, 110, 125, and 250 V. When testing the pickup settings DCLOP and DCHIP, do not operate the SEL-311A Relay outside of the power supply limits listed in Section1: Introduction and Specifications.
Page 188 (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 20011205 SEL-311A Instruction Manual...
Page 189: View Station Dc Battery Voltage
Via Serial Port See MET Command (Metering Data)—Instantaneous Metering in Section 10: Serial Port Communications and Commands. The MET command displays the station dc battery voltage (labeled VDC). Date Code 20011205 Breaker Monitor and Metering Functions 8-17 SEL-311A Instruction Manual...
Page 190: Analyze Station Dc Battery Voltage
When the trip bus is energized, any change in station dc battery voltage can be observed in column Vdc in the event report. Station DC Battery Voltage Dips During Circuit Breaker Closing To generate an event report when the SEL-311A Relay closes the circuit breaker, make the control equation event report generation setting: OGIC ER = /OUT102 + ...
Page 191: 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-311A 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 ac voltage powers the relay, the dc voltage elements in Figure 8.9 see the average of the sampled ac voltage powering...
Page 192: Comparison Of Thermal And Rolling Demand Meters
The current input is at a magnitude of zero and then suddenly goes to an instantaneous level of 1.0 per unit (a “step”). Figure 8.11: Response of Thermal and Rolling Demand Meters to a Step Input (setting DMTC = 15 minutes) 8-20 Breaker Monitor and Metering Functions Date Code 20011205 SEL-311A Instruction Manual...
Page 193 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-311A Relay updates thermal demand values approximately every 2 seconds. Rolling Demand Meter Response (EDEM = ROL) The response of the rolling demand meter in Figure 8.11 (bottom) to the step current input (top)
Page 194 -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 8-22 Breaker Monitor and Metering Functions Date Code 20011205 SEL-311A Instruction Manual...
Page 195: Demand Meter Settings
EDEM or DMTC is different in the new active setting group. Demand current pickup settings PDEMP, GDEMP, and QDEMP can be changed without affecting the demand meters. Date Code 20011205 Breaker Monitor and Metering Functions 8-23 SEL-311A Instruction Manual...
Page 196: Demand Current Logic Output Application-Raise Pickup For Unbalance Current
51GT. This is accomplished with the following settings from Table 8.3, pertinent residual ground overcurrent element settings, and control equation torque control setting 51GTC: OGIC EDEM DMTC 8-24 Breaker Monitor and Metering Functions Date Code 20011205 SEL-311A Instruction Manual...
Page 197 !GDEM + GDEM * 50G1 = NOT(GDEM) + GDEM * 50G1 NOT(logical 0) + (logical 0) * 50G1 = logical 1 Thus, the residual ground time-overcurrent element 51GT operates on its standard pickup: 51GP 1.50 A secondary Date Code 20011205 Breaker Monitor and Metering Functions 8-25 SEL-311A Instruction Manual...
Page 198 !GDEM + GDEM * 50G1 = NOT(GDEM) + GDEM * 50G1 NOT(logical 0) + (logical 0) * 50G1 = logical 1 Thus, the residual ground time-overcurrent element 51GT operates on its standard pickup again: 51GP 1.50 A secondary 8-26 Breaker Monitor and Metering Functions Date Code 20011205 SEL-311A Instruction Manual...
Page 199: View Or Reset Demand Metering Information
See Figure 11.2 in Section 11: Front-Panel Interface. Demand Metering Updating and Storage The SEL-311A 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 200: Energy Metering Updating And Storage
Figure 11.2 in Section 11: Front-Panel Interface. Energy Metering Updating and Storage The SEL-311A 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 201: Maximum/Minimum Metering Updating And Storage
Megawatt and megavar values are subject to the above voltage and current thresholds. The SEL-311A 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 203 Table 9.1: Serial Port SET Commands .....................9-1 Table 9.2: Set Command Editing Keystrokes...................9-2 Table 9.3: SEL-311A Relay Word Bits ....................9-7 Table 9.4: Relay Word Bit Definitions for the SEL-311A ...............9-8 FIGURES Figure 9.1: U.S. Moderately Inverse Curve: U1 ..................9-4 Figure 9.2: U.S. Inverse Curve: U2......................9-4 Figure 9.3: U.S.
Page 205: Section 9: Setting The Relay
SECTION 9: SETTING THE RELAY NTRODUCTION Change or view settings with the SET and SHO 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 206: Settings Changes Via The Serial Port
ETTINGS HANGES VIA THE ERIAL Note: In this manual, commands you type appear in bold/uppercase: METER. Computer keys you press appear in bold/uppercase/brackets: <ENTER>. See Section 10: Serial Port Communications and Commands for information on serial port communications and relay access levels. The SET commands in Table 9.1 operate at Access Level 2 (screen prompt: =>>).
Page 207: Time-Overcurrent Curves
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 208 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 20011205 SEL- - - - 311A Instruction Manual...
Page 209 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 20011205 Setting the Relay SEL- - - - 311A Instruction Manual...
Page 210 Figure 9.8: I.E.C. Class C Curve (Extremely Figure 9.9: I.E.C. Long-Time Inverse Curve: Inverse): C3 6000 (5000) 3000 (2500) 1500 (1250) 600 (500) 300 (250) 150 (125) 60 (50) 30 (25) 1.00 0.90 0.80 15 (12.5) 0.70 0.60 0.50 0.40 0.30 6 (5) 0.20...
Page 211 The Relay Word bit row numbers correspond to the row numbers used in the TAR command (see TAR Command [Target] in Section 10: 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-311A Relay Word Bits Relay Word Bits TIME...
Page 212 2. All output contacts can be “a” or “b” type contacts. See Figure 2.7 and Figure 7.26 for more information on the operation of output contacts OUT101 through ALARM. Table 9.4: Relay Word Bit Definitions for the SEL-311A Primary Definition Application Relay enabled (see Table 5.1)
Page 213 Primary Definition Application ZONE1 Fault in Zone 1/Level 1 ZONE2 Fault in Zone 2/Level 2 TAR67P Torque-controlled phase instantaneous/definite time-overcurrent target TAR67G Directional residual ground instantaneous/definite time-overcurrent target Zone 1 phase distance, instantaneous (see Tripping, Figure 3.4) Control M1PT Zone 1 phase distance, time delayed (see Figure 3.9) Zone 1 ground distance, instantaneous (see Figure 3.6) Z1GT...
Page 214 Primary Definition Application 67G1T Residual ground definite-time overcurrent element 67G1T timed out (derived from 67G1; see Figure 3.13) Residual ground current above pickup setting 51GP Testing, Control for residual ground time-overcurrent element 51GT (see Figure 3.15) 51GT Residual ground time-overcurrent element 51GT Tripping timed out (see Figure 3.15) 51GR...
Page 215 Primary Definition Application Local Bit 9 asserted (see Figure 7.3) LB10 Local Bit 10 asserted (see Figure 7.3) LB11 Local Bit 11 asserted (see Figure 7.3) LB12 Local Bit 12 asserted (see Figure 7.3) LB13 Local Bit 13 asserted (see Figure 7.3) LB14 Local Bit 14 asserted (see Figure 7.3) LB15...
Page 216 Primary Definition Application Latch Bit 9 asserted (see Figure 7.11) LT10 Latch Bit 10 asserted (see Figure 7.11) LT11 Latch Bit 11 asserted (see Figure 7.11) LT12 Latch Bit 12 asserted (see Figure 7.11) LT13 Latch Bit 13 asserted (see Figure 7.11) LT14 Latch Bit 14 asserted (see Figure 7.11) LT15...
Page 217 Primary Definition Application SV7T control equation variable timer output OGIC SV7T asserted (see Figure 7.24) SV8T control equation variable timer output OGIC SV8T asserted (see Figure 7.24) control equation variable timer input SV9 Testing, Seal-in OGIC asserted (see Figure 7.24) functions, etc.
Page 218 Primary Definition Application MAB1 Mho AB phase distance zone 1, instantaneous (see Testing Figure 3.4) MBC1 Mho BC phase distance zone 1, instantaneous (see Figure 3.4) MCA1 Mho CA phase distance zone 1, instantaneous (see Figure 3.4) MAB2 Mho AB phase distance zone 2 instantaneous (see Figure 3.5) MBC2 Mho BC phase distance zone 2, instantaneous (see...
Page 219 Primary Definition Application BCWC C-phase breaker contact wear has reached 100% wear level (see Breaker Monitor in Section 8: Breaker Monitor and Metering Functions) FIDEN Fault Identification Logic Enabled Internal control A-phase to ground or B-C phases to ground fault identification logic output used in distance element logic B-phase to ground or A-C phases to ground fault...
Page 220 Primary Definition Application VPOLV Positive-sequence polarization voltage valid (see Indication Figure 3.4 through Figure 3.7 and Figure 4.15) Phase instantaneous overcurrent element for closed circuit breaker detection (any phase current above pickup setting 50LP; see Figure 5.3) PDEM Phase demand current above pickup setting PDEMP Indication (see Figure 8.13) GDEM...
Page 221 Primary Definition Application F32I Forward channel IP current-polarized directional element (see Figures 4.5 and 4.11) F32Q Forward negative-sequence voltage-polarized directional element (see Figure 4.14) F32QG Forward negative-sequence voltage-polarized directional element (see Figures 4.5 and 4.9) F32V Forward zero-sequence voltage-polarized directional element (see Figure 4.5 and 4.10) IN106 Optoisolated input IN106 asserted (see Figure 7.1) Relay input...
Page 222 Primary Definition Application 25– Maximum phase current above pickup setting 51PP Testing, Control for phase time-overcurrent element 51PT (see Figure 3.14) 51PT Phase time-overcurrent element 51PT timed out (see Tripping Figure 3.14) 51PR Phase time-overcurrent element 51PT reset (see Testing Figure 3.14) 29–...
Page 223 Primary Definition Application RMB8A Channel A, received bit 8 Relay-to-relay communication RMB7A Channel A, received bit 7 (see Appendix I: RMB6A Channel A, received bit 6 IRRORED RMB5A Channel A, received bit 5 RMB4A Channel A, received bit 4 RMB3A Channel A, received bit 3 RMB2A Channel A, received bit 2...
Page 224: Settings Explanations
Identifier Labels Refer to Settings Sheet 1. The SEL-311A 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 225: Line Settings
Other System Parameters Refer to Settings Sheet 12. The global settings NFREQ and PHROT allow you to configure the SEL-311A Relay to your specific system. Set NFREQ equal to your nominal power system frequency, either 50 Hz or 60 Hz.
Page 226: Settings Sheets
Set DATE_F to format the date displayed in relay reports and the front-panel display. Set DATE_F to MDY to display dates in Month/Day/Year format; set DATE_F to YMD to display dates in Year/Month/Day format. ETTINGS HEETS The settings sheets that follow include the definition and input range for each setting in the relay. 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.
Page 227 ETTINGS HEET Page 1 SEL-311A R FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Identifier Labels (See Settings Explanations in Section 9 ) Relay Identifier (30 characters) RID = Terminal Identifier (30 characters) TID = Current and Potential Transformer Ratios (See Settings Explanations in Section 9 ) Phase (IA, IB, IC) Current Transformer Ratio (1–6000)
Page 228 ETTINGS HEET Page 2 SEL-311A R FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Other Enable Settings Directional control (Y, AUTO) E32 = (see Directional Control Settings in Section 4) Load encroachment (Y, N) (see Figure 4.3) ELOAD = Switch-onto-fault (Y, N) (see Figure 5.3)
Page 229 ETTINGS HEET Page 3 SEL-311A R FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Mho Ground Distance Fault Detector Settings (Number of mho ground distance element settings dependent on the larger of preceding enable settings E21MG = 1–2.) Zone 1 phase current FD (0.5–100.00 A secondary {5 A nom.};...
Page 230 ETTINGS HEET Page 4 SEL-311A R FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Phase Definite-Time Overcurrent Element Time Delays (See Figure 3.10) Level 1 (0.00–16000.00 cycles in 0.25-cycle steps) 67P1D = Residual Ground Inst./Def.-Time Overcurrent Element (See Figure 3.13) Level 1 (OFF, 0.25–100.00 A secondary {5 A nom.};...
Page 231 ETTINGS HEET Page 5 SEL-311A R 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.) Ground directional element priority: combination of Q, V, or I ORDER = (Make settings Z2F, 50QFP, a2, and k2 if preceding enable setting E32 = Y.
Page 232 ETTINGS HEET Page 6 SEL-311A R FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Other Settings Minimum trip duration time (4.00–16000.00 cycles in 0.25-cycle steps) TDURD = (see Figure 5.1) Close failure time delay (OFF, 0.00-16000.00 cycles in 0.25-cycle steps) CFD = (see Figure 6.1)
Page 233 ETTINGS HEET Page 7 SEL-311A R FOR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL SV14 Pickup Time (0.00–16000.00 cycles in 0.25-cycle steps) SV14PU = SV14 Dropout Time (0.00–16000.00 cycles in 0.25-cycle steps) SV14DO = SV15 Pickup Time (0.00–16000.00 cycles in 0.25-cycle steps) SV15PU = SV15 Dropout Time (0.00–16000.00 cycles in 0.25-cycle steps)
Page 234 ETTINGS HEET Page 8 SEL-311A R 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 235 ETTINGS HEET Page 9 SEL-311A R FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Set Latch Bit LT12 SET12 = Reset Latch Bit LT12 RST12 = Set Latch Bit LT13 SET13 = Reset Latch Bit LT13...
Page 236 ETTINGS HEET Page 10 SEL-311A R 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 OUT103 = Output Contact OUT104...
Page 237 ETTINGS HEET Page 11 SEL-311A R FOR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Fault indication [used in time target logic (see FAULT = Table 5.1); used also to suspend demand metering updating and peak recording and block max./min.
Page 238 ETTINGS HEET Page 12 SEL-311A R 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) TGR =...
Page 239 ETTINGS HEET Page 13 SEL-311A R 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 240 ETTINGS HEET Page 14 SEL-311A R 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 241 ETTINGS HEET Page 15 SEL-311A R 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 242 ETTINGS HEET Page 16 SEL-311A R 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 243 ETTINGS HEET Page 17 SEL-311A R 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 244 ETTINGS HEET Page 18 SEL-311A R FOR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Display if DP13 = logical 1 (16 characters) DP13_1 = Display if DP13 = logical 0 (16 characters) DP13_0 = Display if DP14 = logical 1 (16 characters)
Page 245 ETTINGS HEET Page 19 SEL-311A R FOR THE ELAY Date SET P ETTINGS ERIAL OMMAND RONT ANEL Protocol Settings (See Below) Protocol (SEL, LMD, DNP, MBA, MBB, MB8A, MB8B) PROTO = Protocol Settings Set PROTO = SEL for standard SEL ASCII protocol. For SEL Distributed Port Switch Protocol (LMD), set PROTO = LMD.
Page 247 Table 10.4: Serial Port Automatic Messages..................10-8 Table 10.5: Serial Port Command Summary ..................10-11 Table 10.6: Event Types ........................10-18 Table 10.7: SEL-311A Relay Word and Its Correspondence to TAR Command ........10-30 Table 10.8: SEL-311A Relay Control Subcommands................10-35 FIGURES Figure 10.1: DB-9 Connector Pinout for EIA-232 Serial Ports ..............10-1...
Page 249: Section 10: Serial Port Communications And Commands
Refer to Figure 1.2 and Figure 2.2 through Figure 2.4. Note that demodulated IRIG-B time code can be input into Serial Port 1 or Serial Port 2 on any of the SEL-311A Relay models. This is easily handled by connecting Serial Port 2 of the SEL-311A Relay to an SEL-2020 with Cable C273A (see cable diagrams that follow in this section).
Page 250 -IRIG-B The following cable diagrams show several types of EIA-232 serial communications cables that connect the SEL-311A 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 251: Sel-311A To Computer
2 TXD GND 9 1 GND CTS 8 4 RTS 5 CTS 6 DSR 8 DCD 20 DTR SEL-311A to Modem or Other DCE Cable C222 SEL-311A Relay **DCE Device 9-Pin Male 25-Pin Male “D” Subconnector “D” Subconnector GND 5...
Page 252: Sel-311A To Sel-2020, Sel-2030, Or Sel-2100
SEL-311A to SEL-2020, SEL-2030, or SEL-2100 Cable C273A SEL-2020/2030 or SEL-2100 SEL-311A Relay 9-Pin Male 9-Pin Male “D” Subconnector “D” Subconnector RXD 2 3 TXD TXD 3 2 RXD IRIG+ 4 4 IRIG+ GND 5 5 GND IRIG- 6 6 IRIG-...
Page 253: Hardware Protocol
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-311A Relay is compatible with the SEL-DTA2 Display/Transducer Adapter. See Settings Sheet 19 in Section 9: Setting the Relay.
Page 254 XOFF, it blocks transmission of any message presented to its buffer. Messages will be accepted after the relay receives XON. 10-6 Serial Port Communications and Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 255: Serial Port Automatic Messages
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 G. Communications IRRORED The SEL-311A Relay supports M relay-to-relay communications on two ports IRRORED simultaneously. See Appendix H. ERIAL...
Page 256: Sel-Dta Protocol
SEL-DTA Protocol When the serial port DTA setting is Y, the AUTO setting is hidden and forced to Y. With DTA set to Y, the SEL-311A Relay is compatible with the SEL-DTA2 Display Transducer Adapter. ERIAL CCESS EVELS Commands can be issued to the relay via the serial port to view metering values, change relay settings, etc.
Page 257: Access Level 1
(commands ACC through TRI in Table 10.5). The 2AC command allows the relay to go to Access Level 2. Enter the 2AC command at the Access Level B prompt: ==>2AC <ENTER> Date Code 20011205 Serial Port Communications and Commands 10-9 SEL-311A Instruction Manual...
Page 258: Access Level 2
Again, a higher access level can access the serial port commands in a lower access level. The commands are shown in upper-case letters, but they can also be entered with lower-case letters. 10-10 Serial Port Communications and Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 259 The relay responds with “Invalid Access Level” if a command is entered from an access level lower than the specified access level for the command. The relay responds: Invalid Command to commands not listed above or entered incorrectly. Date Code 20011205 Serial Port Communications and Commands 10-11 SEL-311A Instruction Manual...
Page 260: Command Explanations
SEL-311A: This is the RID setting (the relay is shipped with the default setting RID =SEL-311A; see Identifier Labels in Section 9: Setting the Relay). BUS B, BREAKER 3: This is the TID setting (the relay is shipped with the default setting TID =BUS B, BREAKER 3;...
Page 261 ALARM contact for one second and remains at Access Level 0 (“=” prompt). Access Level Attempt (Password Not Required) Assume the following conditions: Password jumper = ON (in place), Access Level = 0. Date Code 20011205 Serial Port Communications and Commands 10-13 SEL-311A Instruction Manual...
Page 262: Access Level 1 Commands
See BRE n Command in Access Level B Commands that follows in this section and Breaker Monitor in Section 8: Breaker Monitor and Metering Functions for further details on the breaker monitor. 10-14 Serial Port Communications and Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 263 03/05/00 18:36:09.279 03/05/00 18:37:36.114 2.835 Relay Disabled 03/06/00 13:18:09.236 03/06/00 13:18:09.736 0.499 Parity error 03/07/00 11:43:35.547 03/07/00 11:43:35.637 0.089 Underrun 03/09/00 17:18:12.993 03/09/00 17:18:13.115 0.121 Relay Disabled => Date Code 20011205 Serial Port Communications and Commands 10-15 SEL-311A Instruction Manual...
Page 264: Access Level B Commands
Access Level B Commands that follows in this section and Multiple Setting Groups in Section 7: Inputs, Outputs, Timers, and Other Control Logic for further details on settings groups. 10-16 Serial Port Communications and Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 265 (enable setting EFLOC = Y), the fault locator will attempt to run if the event report is generated by a trip (assertion of TRIP Relay Word bit) or other programmable ® event report trigger condition (SEL control equation setting ER). OGIC Date Code 20011205 Serial Port Communications and Commands 10-17 SEL-311A Instruction Manual...
Page 266 IRI directs the relay to read the demodulated IRIG-B time code at the serial port input. To force the relay to synchronize to IRIG-B, enter the following command: =>IRI <ENTER> 10-18 Serial Port Communications and Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 267 Zero-sequence voltage (kV primary) Frequency FREQ (Hz) Instantaneous power system frequency (measured on voltage channel VA) Station DC VDC (V) Voltage at POWER terminals (input into station battery monitor) Date Code 20011205 Serial Port Communications and Commands 10-19 SEL-311A Instruction Manual...
Page 268 =>MET 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-311A Relay is shown: =>MET <ENTER>...
Page 269 The output from an SEL-311A Relay is shown: =>MET D <ENTER> MET D <ENTER> MET D <ENTER> MET D <ENTER> SEL-311A Date: 03/12/00 Time: 16:22:04.372 EXAMPLE: BUS B, BREAKER 3 DEMAND 188.6 186.6 191.8 PEAK 188.6 186.6 191.8 MW3P MVARA...
Page 270 Reset Time Last time the maximum/minimum meter was reset To view maximum/minimum metering values, enter the command: =>MET M <ENTER> The output from an SEL-311A Relay is shown: =>MET M <ENTER> MET M <ENTER> MET M <ENTER> MET M <ENTER>...
Page 271 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-311A Relay, showing all the factory default settings.
Page 272 SOTFD = 30.00 DMTC = 60 PDEMP = OFF GDEMP = OFF QDEMP = OFF TDURD = 9.00 = 60.00 3POD = 0.50 = 52 50LP = 0.25 => 10-24 Serial Port Communications and Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 273 RST13 =0 SET14 =0 RST14 =0 SET15 =0 RST15 =0 Press RETURN to continue SET16 =0 RST16 =0 67P1TC=1 51GTC =1 OUT101=TRIP OUT102=TRIP OUT103=CLOSE OUT104=0 OUT105=0 OUT106=0 OUT107=0 =52A Date Code 20011205 Serial Port Communications and Commands 10-25 SEL-311A Instruction Manual...
Page 274 RTSCTS= N FASTOP= N => =>SHO R <ENTER> SHO R <ENTER> SHO R <ENTER> SHO R <ENTER> Sequential Events Recorder trigger lists: SER1 =M1P,Z1G,M2P,Z2G,51G,50P1 SER2 =IN101,IN102,OUT101,OUT102,OUT103,LOP SER3 =0 => 10-26 Serial Port Communications and Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 275 =>STA n <ENTER> where n is an optional parameter to specify the number of times (1–32767) to repeat the status display. If n is not specified, the status report is displayed once. The output of an SEL-311A Relay is shown:...
Page 276 The relay latches all self-test warnings and failures in order to capture transient out-of-tolerance conditions. To reset the self-test statuses, use the STA C command from Access Level 2: =>>STA C <ENTER> 10-28 Serial Port Communications and Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 277 Relay Word rows. The first 2 rows correspond to Table 10.7. All rows of the Relay Word are described in Section 9: Setting the Relay. Date Code 20011205 Serial Port Communications and Commands 10-29 SEL-311A Instruction Manual...
Page 278 SOTF, 51P, 51G, A, B, C, G, Zone 1, Zone 2, 67P, and 67G. Unlatches the trip logic for testing purposes (see Figure 5.1). Shows Relay Word Row 0. Table 10.7: SEL-311A Relay Word and Its Correspondence to TAR Command TRIP TIME...
Page 279 TRIP 00000000 00000000 00000000 00000000 0 0 0 0 0 0 0 0 => See Section 12: Standard Event Reports and SER for more information on event reports. Date Code 20011205 Serial Port Communications and Commands 10-31 SEL-311A Instruction Manual...
Page 280 Rly Trips= 0.0 IB= 0.0 IC= 0.0 kA Ext Trips= 0.0 IB= 0.0 IC= 0.0 kA Percent wear: A= 0 B= 0 C= LAST RESET 03/03/00 05:41:07 ==> 10-32 Serial Port Communications and Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 281 The relay switches to Group 2 and pulses the ALARM contact. If the serial port AUTO setting = Y, the relay sends the group switch report: ==> SEL-311A Date: 03/13/00 Time: 10:12:45.627 EXAMPLE: BUS B, BREAKER 3 Active Group = 2 ==> Date Code 20011205 Serial Port Communications and Commands 10-33 SEL-311A Instruction Manual...
Page 282 (e.g. OUT101, OUT107, ALARM—see Figure 7.26. is the pulse duration (1–30 seconds). If y is not specified, the pulse duration defaults to 1 second. 10-34 Serial Port Communications and Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 283: Access Level 2 Commands
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 10.8: SEL-311A Relay Control Subcommands Subcommand Description SRB n Set Remote Bit n (“ON”...
Page 284 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 Canceled. =>> 10-36 Serial Port Communications and Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 285 PAS 1 DISABLE disables password protection for Level 1. 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. Date Code 20011205 Serial Port Communications and Commands 10-37 SEL-311A Instruction Manual...
Page 287: Sel-311A Relay Command Summary
SEL-311A Relay Command Summary Access Level 0 The only thing that can be done at Access level 0 is to go to Access Level 1. The screen prompt is: = Command 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 288 SET P n Change Port n settings. SET R Change Sequential Events Recorder (SER) settings. SET T Change text label settings. STA C Resets self-test warnings/failures and reboots relay. Displays version and configuration information. Command Summary Date Code 20011205 SEL-311A Instruction Manual...
Page 289 Figure 11.1: SEL-311A Relay Front-Panel Pushbuttons—Overview.............11-1 Figure 11.2: SEL-311A Relay Front-Panel Pushbuttons—Primary Functions........11-2 Figure 11.3: SEL-311A Relay Front-Panel Pushbuttons—Primary Functions (Continued) ....11-3 Figure 11.4: SEL-311A Relay Front-Panel Pushbuttons—Secondary Functions........11-5 Figure 11.5: Local Control Switch Configured as an ON/OFF Switch ..........11-6 Figure 11.6: Local Control Switch Configured as an OFF/MOMENTARY Switch......11-6...
Page 291: Section 11: Front-Panel Interface (Only On Models With Lcd)
This section describes how to get information, make settings, and execute control operations from the relay front panel. It also describes the default displays. Note: This section only applies to SEL-311A Relay models with an LCD. Disregard this section for relays ordered with Targets Only (no LCD).
Page 292: Primary Functions
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-311A 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 293 The factory default passwords for Access Level 1, B, and 2 are: Access Level Factory Default Password OTTER EDITH TAIL Table 2.3 Figure 11.3: SEL-311A Relay Front-Panel Pushbuttons—Primary Functions (Continued) Date Code 20011205 Front-Panel Interface (Only on Models with LCD) 11-3 SEL-311A Instruction Manual...
Page 294: Secondary Functions
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). 11-4 Front-Panel Interface (Only on Models with LCD) Date Code 20011205 SEL-311A Instruction Manual...
Page 295 Figure 11.4: SEL-311A Relay Front-Panel Pushbuttons—Secondary Functions Date Code 20011205 Front-Panel Interface (Only on Models with LCD) 11-5 SEL-311A Instruction Manual...
Page 296: Functions Unique To The Front-Panel Interface
Figure 11.5: Local Control Switch Configured as an ON/OFF Switch Figure 11.6: Local Control Switch Configured as an OFF/MOMENTARY Switch Figure 11.7: Local Control Switch Configured as an ON/OFF/MOMENTARY Switch 11-6 Front-Panel Interface (Only on Models with LCD) Date Code 20011205 SEL-311A Instruction Manual...
Page 297: View Local Control (With Example Settings)
“output contact testing” function: Output Contact ¬® Testing This front-panel function provides the same function as the serial port PUL command (see Figure 11.3). Date Code 20011205 Front-Panel Interface (Only on Models with LCD) 11-7 SEL-311A Instruction Manual...
Page 298: Operate Local Control (With Example Settings)
(long enough to be seen), and then it returns to the RETURN position: ¬® MANUAL TRIP Position: RETURN The MANUAL CLOSE switch is an OFF/MOMENTARY type switch, like the MANUAL TRIP switch, and operates similarly. 11-8 Front-Panel Interface (Only on Models with LCD) Date Code 20011205 SEL-311A Instruction Manual...
Page 299: Local Control State Retained When Relay Deenergized
(i.e., no corresponding switch position label settings were made) and no display point labels are enabled for display. Date Code 20011205 Front-Panel Interface (Only on Models with LCD) 11-9 SEL-311A Instruction Manual...
Page 300 (a 52a circuit breaker auxiliary contact is connected to input IN101; see Optoisolated Inputs in Section 7: Inputs, Outputs, Timers and Other Control Logic). 11-10 Front-Panel Interface (Only on Models with LCD) Date Code 20011205 SEL-311A Instruction Manual...
Page 301 DP2_1 = CLOSE ENABLED DP2 = LB1 = logical 1 DP2_0 = CLOSE DISABLED DP4_1 = BREAKER CLOSED DP4 = IN101 = logical 1 DP4_0 = BREAKER OPEN Date Code 20011205 Front-Panel Interface (Only on Models with LCD) 11-11 SEL-311A Instruction Manual...
Page 302: Scroll Lock Control Of Front Panel Lcd
8 seconds for 1 second as a reminder that the display is in Scroll Lock Control mode. Scroll lock OFF SELECT to Lock 11-12 Front-Panel Interface (Only on Models with LCD) Date Code 20011205 SEL-311A Instruction Manual...
Page 303: Stop Scrolling (Lock)
See Figure 5.4 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 20011205 Front-Panel Interface (Only on Models with LCD) 11-13 SEL-311A Instruction Manual...
Page 305 Figure 12.3: Derivation of Event Report Current Values and RMS Current Values From Sampled Current Waveform..................12-22 Figure 12.4: Derivation of Phasor RMS Current Values From Event Report Current Values.....12-23 Figure 12.5: Example Sequential Events Recorder (SER) Event Report ..........12-27 Date Code 20011205 Standard Event Reports and SER SEL-311A Instruction Manual...
Page 307: Section 12: Standard Event Reports And Ser
See Figure 12.2 for an example event report (Note: Figure 12.2 is on multiple pages). Event Report Length (Settings LER and PRE) The SEL-311A Relay provides user-programmable event report length and pre-fault length. Event report length is 15, 30, 60, or 180 cycles. Pre-fault length ranges from 1 to 179 cycles.
Page 308 When setting ER sees a logical 0 to logical 1 transition, it generates an event report (if the SEL-311A Relay is not already generating a report that encompasses the new transition). The factory setting is:...
Page 309: Event Summary
See Figure 12.2. Figure 12.1 corresponds to the full-length standard 15-cycle event report in Figure 12.2. (Note: Figure 12.2 is on multiple pages.) Date Code 20011205 Standard Event Reports and SER 12-3 SEL-311A Instruction Manual...
Page 310 Two phase-to-ground faults. Appends T if TRIP asserted. TRIP Assertion of Relay Word bit TRIP (fault locator could not operate successfully to determine the phase involvement, so just TRIP is displayed). 12-4 Standard Event Reports and SER Date Code 20011205 SEL-311A Instruction Manual...
Page 311 Fault currents and voltages use the same data as the fault locator. If the fault locator does not operate, the fault data is sampled one and one-quarter cycles after the event report is triggered. Date Code 20011205 Standard Event Reports and SER 12-5 SEL-311A Instruction Manual...
Page 312: Retrieving Full-Length Standard Event Reports
Display the report in Compressed ASCII format. Specifies only that the communication elements section of the event is displayed. Below are example EVE commands. 12-6 Standard Event Reports and SER Date Code 20011205 SEL-311A Instruction Manual...
Page 313: Compressed Ascii Event Reports
Appendix E: Compressed ASCII Commands for further information. Filtered and Unfiltered Event Reports The SEL-311A 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.
Page 314: Clearing Standard Event Report Buffer
Figure 12.3 shows how event report current column data relates to the actual sampled current waveform and RMS current values. Figure 12.4 shows how event report current column data can be converted to phasor RMS current values. 12-8 Standard Event Reports and SER Date Code 20011205 SEL-311A Instruction Manual...
Page 315 ZBG2 If Zone 2 BG element (MBG2) set, not ZBG1 ZCG1 If Zone 1 CG element (MCG1) set ZCG2 If Zone 2 CG element (MCG2) set, not ZCG1 Date Code 20011205 Standard Event Reports and SER 12-9 SEL-311A Instruction Manual...
Page 316 Residual ground demand ammeter element GDEM picked up. ZLIN, ZLOUT Load encroachment “load in” element ZLIN picked up. Load encroachment “load out” element ZLOUT picked up. Loss-of-potential element LOP picked 12-10 Standard Event Reports and SER Date Code 20011205 SEL-311A Instruction Manual...
Page 317 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 20011205 Standard Event Reports and SER 12-11 SEL-311A Instruction Manual...
Page 318 Both RMB3A and RMB4A asserted. RMB A 5 6 RMB5A, RMB6A channel A receive bit IRRORED 5 RMB5A asserted. channel A receive bit IRRORED 6 RMB6A asserted. Both RMB5A and RMB6A asserted. 12-12 Standard Event Reports and SER Date Code 20011205 SEL-311A Instruction Manual...
Page 319 Both RMB3B and RMB4B asserted. RMB B 5 6 RMB5B, RMB6B channel B receive bit IRRORED 5 RMB5B asserted. channel B receive bit IRRORED 6 RMB6B asserted. Both RMB5B and RMB6B asserted. Date Code 20011205 Standard Event Reports and SER 12-13 SEL-311A Instruction Manual...
Page 320 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 12-14 Standard Event Reports and SER Date Code 20011205 SEL-311A Instruction Manual...
Page 321 (see Figure 12.2 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. Date Code 20011205 Standard Event Reports and SER 12-15 SEL-311A Instruction Manual...
Page 322 0.1 110.4 24 -103.1 [11] -673 69.2 -128.5 60.4 63.7 -2 111.8 4.0 -116.0 24 105.0 -2 -69.3 131.6 -62.3 24 -65.1 -2 -111.8 -4.1 116.0 24 -106.7 12-16 Standard Event Reports and SER Date Code 20011205 SEL-311A Instruction Manual...
Page 323 .1..V .p 1. QQ 1..b4.. 1.. .1..V .p 1. QQ 1..b4.. 1.. .1..V .p 1. QQ 1..b4.. 1.. Date Code 20011205 Standard Event Reports and SER 12-17 SEL-311A Instruction Manual...
Page 324 ...... . 00 00 00 00 40 00 ........00 00 00 00 40 00 ....12-18 Standard Event Reports and SER Date Code 20011205 SEL-311A Instruction Manual...
Page 325 *..... . 00 00 00 00 40 00 ....Event: BCG T Location: 48.84 Shot: Frequency: 60.01 Targets: ZONE1 Currents (A Pri), ABCPGQ: 200 2478 2480 212 4294 Date Code 20011205 Standard Event Reports and SER 12-19 SEL-311A Instruction Manual...
Page 326 SET4 =0 RST4 =0 SET5 =0 RST5 =0 SET6 =0 RST6 =0 SET7 =0 RST7 =0 SET8 =0 RST8 =0 SET9 =0 RST9 =0 SET10 =0 RST10 =0 12-20 Standard Event Reports and SER Date Code 20011205 SEL-311A Instruction Manual...
Page 327 DCHIP = OFF IN101D= 0.00 IN102D= 0.00 IN103D= 0.00 IN104D= 0.00 IN105D= 0.00 IN106D= 0.00 EBMON = N =>> Figure 12.2: Example Standard 15-Cycle Event Report 1/4 Cycle Resolution Date Code 20011205 Standard Event Reports and SER 12-21 SEL-311A Instruction Manual...
Page 328 In Figure 12.3, note that any two rows of current data from the event report in Figure 12.2, 1/4 cycle apart, can be used to calculate RMS current values. 12-22 Standard Event Reports and SER Date Code 20011205 SEL-311A Instruction Manual...
Page 329 Figure 12.4: Derivation of Phasor RMS Current Values From Event Report Current Values Date Code 20011205 Standard Event Reports and SER 12-23 SEL-311A Instruction Manual...
Page 330: Sequential Events Recorder (Ser) Report
The relay displays the setting as: SER1 = 51P,51G,51PT,51GT,50P1 The relay can monitor up to 72 elements in the SER (24 in each of SER1, SER2, and SER3). 12-24 Standard Event Reports and SER Date Code 20011205 SEL-311A Instruction Manual...
Page 331 (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. Date Code 20011205 Standard Event Reports and SER 12-25 SEL-311A Instruction Manual...
Page 332: Clearing Ser Report
XAMPLE EQUENTIAL VENTS ECORDER EPORT The following example sequential events recorder (SER) report in Figure 12.5 also corresponds to the example standard 15-cycle event report in Figure 12.2. 12-26 Standard Event Reports and SER Date Code 20011205 SEL-311A Instruction Manual...
Page 333 Elements 50P1, M1P, 51G, and M2P deassert as the circuit breaker opens IN101 is deasserts when the circuit breaker opens. Related Setting: 52A = IN101 2, 1 Outputs OUT101 and OUT102 deassert. Date Code 20011205 Standard Event Reports and SER 12-27 SEL-311A Instruction Manual...
Page 335 Table 13.2: Output Contact and Target LED Results................13-10 Table 13.3: Test Quantities for Zone 2 Phase Distance Element ............13-31 Table 13.4: Test Quantities for Zone 2 Ground Mho Distance Element..........13-38 Table 13.5: Relay Self-Tests.........................13-44 Date Code 20011205 Testing and Troubleshooting SEL-311A Instruction Manual...
Page 336 Figure 13.5: Phase-to-Ground Fault Test Connections Using a Single Current Source.......13-15 Figure 13.6: Phase-to-Phase Fault Test Connections Using a Single Current Source......13-16 Figure 13.7: Communications Connections Between the SEL-311A Relay and a Terminal ....13-17 Figure 13.8: Phase Distance Element Test Voltage Signals ..............13-33...
Page 337: Section 13: Testing And Troubleshooting
SECTION 13: TESTING AND TROUBLESHOOTING NTRODUCTION This section provides guidelines for determining and establishing test routines for the SEL-311A 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 338: 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 and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 339: Testing Methods And Tools
Use the PULSE (PUL) command to test the contact output circuits. The Command PULSE command is available at the serial ports and the front panel. See Section 10: Serial Port Communications and Commands. Date Code 20011205 Testing and Troubleshooting 13-3 SEL-311A Instruction Manual...
Page 340: Low-Level Test Interface
Low-Level Test Interface The SEL-311A 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 341: 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-311A Relay, ®...
Page 342: Relay Testing
SEL-311A, SEL-311B, and SEL-311C Relays. Note that the SEL-311A has two zones, the SEL-311B has three zones, and the SEL-311C has four zones. Settings E21P, E21MG, and E21XG will need to be set to “2” instead of “3” when testing the SEL-311A. Equipment Required The following equipment is necessary for initial checkout.
Page 343 LCD screen. Use the Up and Down arrow buttons to view the results of specific relay self-tests. Press the front panel EXIT button to exit the STATUS display. Date Code 20011205 Testing and Troubleshooting 13-7 SEL-311A Instruction Manual...
Page 344 Use the arrow buttons to select the remaing letters. The blank character precedes the second letter of the password. When the lower line of the display reads the following (where “XYZ” represents the current password): PASSWORD: XYZ 13-8 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 345 SELECT again. Use the Left arrow button to selct the menu item SET, then press SELECT again. Note: The SEL-311A Relays includes six setting groups. While you are testing this relay, it is important to change settings in the group that is active. If you change settings in an inactive setting group, the relay performance will not change.
Page 346: Output Contact Explanation
The KEY element is used in Permissive Overreaching Transfer Tripping protection schemes to send the permissive signal to the remote end. The SEL-311A Relay asserts the KEY element when overreaching Zone 2 elements pick up, if other conditions permit. (Note: The POTT scheme is not available in the SEL-311B and SEL-311A Relays.)
Page 347: Front Panel Lcd Explanation
Figure 13.2 shows connections to use when three voltage sources and three current sources are available. Any protective element may be tested and any fault type simulated using these connections. Date Code 20011205 Testing and Troubleshooting 13-11 SEL-311A Instruction Manual...
Page 348 Phase-to-phase, phase-ground, and two-phase-ground faults may be simulated using the connections shown in Figure 13.3. Three-phase faults may be simulated using the connections shown in Figure 13.4. 13-12 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 349 Figure 13.3: Phase-to-Phase, Phase-to-Ground, and Two-Phase-to-Ground Fault Test Connections Using Two Current Sources Date Code 20011205 Testing and Troubleshooting 13-13 SEL-311A Instruction Manual...
Page 350 Figure 13.5 and Figure 13.6 show connections to use when three voltage sources and a single current source are available. Phase-ground faults may be simulated using the connections shown in Figure 13.5. Phase-to-phase faults may be simulated using the connections shown in Figure 13.6. 13-14 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 351 Figure 13.5: Phase-to-Ground Fault Test Connections Using a Single Current Source Date Code 20011205 Testing and Troubleshooting 13-15 SEL-311A Instruction Manual...
Page 352: Serial Communication Equipment Connections
We recommend using a terminal during relay testing. Figure 13.7 shows typical connections between a computer and the SEL-311A Relay Port F. Complete details regarding serial communications with the relay may be found in Section 10: Serial Port Communications and Commands.
Page 353: Test Procedures
Communications Connections Between the SEL-311A Relay and a Terminal ROCEDURES This section includes outline test procedures for overcurrent, directional, phase distance, and ground distance elements included in the SEL-311A Relay. The procedures are general, so that they may be applied to any specific element or zone. Overcurrent Elements The SEL-311A Relay includes phase, residual, negative-sequence, and positive-sequence overcurrent elements.
Page 354 Calculating Overcurrent Element Test Quantities The SEL-311A Relay is equipped with several different types of overcurrent elements. Each has a specific purpose and a slightly different method of testing. The types of overcurrent elements, the signals they operate from, and the elements of that type are listed below.
Page 355: Negative-Sequence Directional Element
Negative-Sequence Directional Element The SEL-311A Relay includes phase (F32Q and R32Q) and ground (F32QG and R32QG) directional elements that operates based upon the calculated magnitude and angle of negative- sequence impedance applied to the relay. There are two methods of testing these elements. The first, using a single voltage and current, and the second using three voltages and one current.
Page 356 R32Q and R32QG elements, if other supervisory conditions permit. The forward directional threshold is calculated using Equation 13.2 when Z2F is negative or Equation 13.3 when Z2F is positive. 13-20 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 357 These supervisory conditions are described below: Magnitude of 3I The SEL-311A Relay uses the 50QF and 50QR negative-sequence overcurrent elements to supervise operation of the directional element. If the magnitude of applied 3I is not greater than the 50QFP setting, the F32Q and F32QG elements do not assert to indicate direction.
Page 358 At the prompt, type Y <ENTER> to accept those settings. Connect outputs OUT106 and OUT107 to the sense input of your test set, an ohmmeter, or some other contact sensing device. 13-22 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 359 Determine the magnitude of A-phase current where Z2 equals Z2R or Z2F using Equation 13.6: • 3 Equation 13.6 For Z2R = 5.45 W: • 3 volts ohms amps Calculate Z2m: ohms Because Z2R is positive, use Equation 13.4 to calculate Z2RT. Date Code 20011205 Testing and Troubleshooting 13-23 SEL-311A Instruction Manual...
Page 360 Z2c is now less than Z2RT. F32Q asserts, closing OUT106 when │ = 23.4 amps, indicating that Z2c is less than Z2FT. │I Verify the performance described above by calculating Z2c using Equation 13.1 and the test quantities listed above. 13-24 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 361 OUT106 and OUT107 outputs. From Access Level 2, execute the SET L n command to configure Output 6 and Output 7 to close for assertion of the F32Q and R32Q elements, respectively. Date Code 20011205 Testing and Troubleshooting 13-25 SEL-311A Instruction Manual...
Page 362 When you apply the voltage signals shown above, V is 180° out of phase from V Take this into account, and calculate the angle of I with respect to the angle of V 13-26 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 363 3.3 amps, Z2c is less than Z2RT, so R32Q deasserts. For Z2F = 0.77 W: • 3 volts ohms amps Calculate Z2m: ohms Because Z2F is positive, use Equation 13.3 to calculate Z2FT. Date Code 20011205 Testing and Troubleshooting 13-27 SEL-311A Instruction Manual...
Page 364 ° Ð ° Ð ° Ð ° Ð ° Ð ° Ð ° • I • Ð ° Ð ° Ð ° • • Equation 13.1 ohms ohms when ohms 13-28 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 365: Phase Mho Distance Elements
Phase Mho Distance Elements The SEL-311A Relay includes up to four zones of mho phase distance protection. Enable the number of phase distance zones you would like to apply using the E21P setting. Zones 1 and 2 are fixed forward. Zones 3 and 4 may be set forward or reverse. The reach and direction of each zone is independent from the other zones.
Page 366 180° to the calculated test current phase angle. Verify correct operation of the 32QR element for the test voltage and current signals using Equation 13.1 in the Negative-Sequence Directional Element Test Procedure. 13-30 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 367 The relay phase distance elements operate based upon the magnitude of applied phase-to-phase impedance. The impedance calculation is also supervised by the functions described. To effectively test the distance elements, select voltage and Date Code 20011205 Testing and Troubleshooting 13-31 SEL-311A Instruction Manual...
Page 368 The reach of the distance element under test is defined by the element setting. In this case Z2P = 9.36 secondary ohms. Calculate the magnitude of V using Equation 13.7. 13-32 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 369 The phase distance element maximum reach is measured when faulted phase-to- phase current lags faulted phase-to-phase voltage by the distance element maximum torque angle. In the SEL-311A Relay, the phase distance element maximum torque angle is defined by the angle of the relay Z1ANG setting.
Page 370 Turn on the voltage sources. Apply V , and V at the magnitudes and angles listed in Table 13.3. Turn on the current test source. Set the current angle to -174°. 13-34 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 371: Ground Mho Distance Elements
Ground Mho Distance Elements The SEL-311A Relay includes up to four zones of mho ground distance protection. Enable the number of ground distance zones you would like to apply using the E21MG setting. Zones 1 and 2 are fixed forward. Zones 3 and 4 may be set forward or reverse. The reach and direction of each zone is independent from the other zones.
Page 372 If you test the ground distance elements using low voltage signals, set ELOP = N to simplify the test. 13-36 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 373 Pole Open Logic If significant pole-scatter occurs when a circuit breaker closes, sensitive ground distance elements may operate undesirably due to the unbalanced signals applied. The SEL-311A Relay disables the ground distance elements during Three-Pole Open conditions and for a short, settable time after the breaker closes.
Page 374 The 50QF negative-sequence overcurrent element operates based upon the magnitude of 3I applied. Using the current connections shown in Figure 13.5, we can calculate the magnitude of 3I applied based upon the magnitude of I TEST 13-38 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 375 The SEL-311A Relay uses k0M1 and k0A1 settings to define the zero- sequence current compensation factor for Zone 1 ground distance elements. When the advanced user settings are not enabled (EADVS = N), the remaining zone settings, k0M and k0A, follow k0M1 and k0A1.
Page 376 Taking the test signals from Table 13.4. Ð ° Ð ° Ð ° × Ð + ° Ð × ° Ð + ° Ð × ° Ð ° volts Ð ° volts 13-40 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 377 TEST Calculate the magnitude of I using Equation 13.10. TEST2 TEST amps TEST Line Impedance Angle Test Impedance Angle amps TEST ° ° amps Equation 13.10 TEST ° amps TEST Date Code 20011205 Testing and Troubleshooting 13-41 SEL-311A Instruction Manual...
Page 378 · Verify the directional element settings. 32QF supervises forward- reaching phase and ground distance elements. 32QR supervises reverse-reaching phase and ground distance elements. 13-42 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 379: Relay Self-Tests
· The relay generates automatic STATUS reports at the serial port for warnings and failures. · The relay displays failure messages on the relay LCD display for failures. Use the serial port STATUS command or front-panel STATUS pushbutton to view relay self-test status. Date Code 20011205 Testing and Troubleshooting 13-43 SEL-311A Instruction Manual...
Page 380 10 seconds. Failure +14.00 V Latched +16.00 V TEMP Warning Measures the temperature -40° C at the A/D voltage +85° C reference every 10 seconds. Failure Latched -50° C +100° C 13-44 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 381 10 seconds. The following self-tests are performed by dedicated circuitry in the microprocessor and the SEL-311A Relay main board. Failures in these tests shut down the microprocessor and are not shown in the STATUS report. Micro-...
Page 382: Relay Troubleshooting
4. Relay may be set to LMD protocol, which requires an address to turn on the serial port. View the port setting using the front-panel SET buttons to see if the port is set to LMD and to see the address. 13-46 Testing and Troubleshooting Date Code 20011205 SEL-311A Instruction Manual...
Page 383: Relay Calibration
5. Inspect the relay self-test status with the STA command or with the front-panel STATUS button. ELAY ALIBRATION The SEL-311A Relay is factory-calibrated. If you suspect that the relay is out of calibration, please contact the factory. ACTORY SSISTANCE We appreciate your interest in SEL products and services. If you have questions or comments, please contact us at: Schweitzer Engineering Laboratories, Inc.
Page 385 SECTION 14: APPLICATION SETTINGS FOR SEL-2PG10 RELAYS ................14-1 SEL-2PG10 to SEL-311A Settings Conversion Guide ..............14-1 Application Settings......................14-2 Convert SEL-2PG10 Primary Quantities to SEL-311A Secondary Quantities ....14-2 Convert SEL-2PG10 Relay Settings to SEL-311A Relay Settings ........14-2 ® Convert SEL-2PG10 Output Mask Logic Settings to SEL Control Equations..14-5...
Page 387 IRRORED OGIC relay may be returned to the setting APP = 311A to make all of the SEL-311A settings visible. It is important to remember that changing from APP = 311A to APP = 2PG10 changes settings in the relay. Changing from APP = 2PG10 to APP = 311A makes more SEL-311A settings visible, but does not change any other settings.
Page 388 Z1P is the SEL-311A Zone 1 reach setting in secondary ohms. Convert SEL-2PG10 Relay Settings to SEL-311A Relay Settings Table 14.1 shows all the SEL-311A Relay settings that must be entered for the relay to perform protection similar to the SEL-2PG10 when APP = 2PG10. Calculate each SEL-311A Relay setting from the corresponding SEL-2PG10 Relay setting using the formula shown.
Page 389 Table 14.1: SEL-311A Settings Calculated From SEL-2PG10 Settings SEL-311A Calculated from SEL-311A Instruction SEL-2PG10 Relay Setting SEL-2PG10 Settings Manual Section Instruction Manual Section None Section 4—Set = ID = CTR Section 9—Settings Sheets CTRP = CTR = PTR PTRS = SPTR Section 9—Settings...
Page 390 Ground Overcurrent Elements = 32IE * Curve U1 in the SEL-311A is slightly different from curve 1 in the SEL-2PG10. Time dial adjustments may be necessary. Note: SEL-311A phase-to-phase fault detector setting (50PP1) is set to its minimum value and hidden.
Page 391 Control Equations OGIC See Access Level 2 Commands in Section 4: Commands and Serial Communications in the SEL-2PG10 Instruction Manual for a description of output masks. In the SEL-311A, output masks are replaced by SEL control equations as shown below: OGIC Table 14.2: SEL-311A SEL...
Page 392 This is the default SEL control equation for TR when APP = 2PG10. OGIC When setting APP = 2PG10, the SEL-311A automatically sets the following SEL control OGIC equations. Change the settings just as you would change the Mask Logic settings in an SEL-2PG10 to customize the relay logic.
Page 393 OUT103 = MABC1 (Reserved for A1) OUT104 = MPP1 (Reserved for A2) OUT105 = 51G (Reserved for A3) OUT106 = 51GT (Reserved for A4) OUT107 = 67G1T (Reserved for A5) Date Code 20011205 Application Settings for SEL-2PG10 Relays 14-7 SEL-311A Instruction Manual...
Page 395 SEL-311A S ETTINGS HEET Page 1 2PG10 PPLICATION ETTING Date Identifier Labels (See Settings Explanations in Section 9 ) Relay Identifier (30 characters) RID = Terminal Identifier (30 characters) TID = Current and Potential Transformer Ratios (See Settings Explanations in Section 9 ) Phase (IA, IB, IC) Current Transformer Ratio (1–6000)
Page 396 SEL-311A S ETTINGS HEET Page 2 2PG10 PPLICATION ETTING Date Directional Elements (See Directional Control Settings in Section 4 ) Ground directional element priority: combination of Q, V, or I ORDER = Control Equation Variable Timers (See Figures 7.23 and 7.24)
Page 397 SEL-311A S ETTINGS HEET Page 3 2PG10 PPLICATION ETTING Date Communications Settings Baud Rate (300, 1200, 2400, 4800, 9600, 19200, 38400) SPEED = Data Bits (6, 7, 8) BITS = Parity (O, E, N) {Odd, Even, None} PARITY = Stop Bits (1, 2)
Page 399 A5E3 Fast Operate Breaker Control .................. D-10 A5CD Fast Operate Reset Definition Block..............D-10 A5ED Fast Operate Reset Command................. D-10 ID Message ........................D-11 DNA Message ........................D-11 BNA Message ........................D-13 SNS Message ........................D-13 Date Code 20011205 Appendices Table of Contents SEL-311A Instruction Manual...
Page 400 APPENDIX E: COMPRESSED ASCII COMMANDS.......E-1 Introduction..........................E-1 CASCII Command—General Format..................E-1 CASCII Command—SEL-311A....................E-2 CSTATUS Command—SEL-311A..................... E-4 CHISTORY Command—SEL-311A................... E-4 CEVENT Command—SEL-311A....................E-5 CSU Command—SEL-311A....................... E-7 ® APPENDIX F: SETTING SEL CONTROL EQUATIONS ....F-1 OGIC Relay Word Bits ...........................F-1 Relay Word Bit Operation Example—Phase Time-Overcurrent Element 51PT....F-1...
Page 401 Control Equation Operators (Listed in Processing Order)........F-3 OGIC Table G.1: Data Access Methods ......................G-3 Table G.2: SEL-311A DNP Object Table ....................G-6 Table G.3: SEL-311A-Wye DNP Data Map ................... G-9 FIGURES Figure F.1: Result of Rising Edge Operators on Individual Elements in Setting ER ......F-6 Figure F.2: Result of Falling Edge Operator on a Deasserting Overcurrent Element ......F-7...
Page 403: Appendix A: Firmware Versions
APPENDIX A: FIRMWARE VERSIONS This manual covers SEL-311A 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-311A-R103-V0-Z002002-D20011205 This firmware differs from the original as follows: - Added 180-cycle event report option.
Page 405: 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-311A 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 406 “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 20011205 SEL-311A Instruction Manual...
Page 407 12. The relay illuminates the EN front-panel LED if the original relay settings were retained through the download. If the EN LED is illuminated, proceed to Step 13; otherwise, the relay may display various self-test failures because of changes in the way memory is used. Date Code 20011205 Firmware Upgrade Instructions SEL-311A Instruction Manual...
Page 408 13. Verify the calibration settings by issuing the SHO C command. If the settings do not match the settings recorded in Step 3, reissue the settings with the SET C command. Firmware Upgrade Instructions Date Code 20011205 SEL-311A Instruction Manual...
Page 409 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 20011205 Firmware Upgrade Instructions SEL-311A Instruction Manual...
Page 411: Appendix C: Sel Distributed Port Switch Protocol
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 20011205 SEL Distributed Port Switch Protocol SEL-311A Instruction Manual...
Page 413: Appendix D: Configuration, Fast Meter, And Fast Operate Commands
ASCII commands can also be accessed by a device that does not interleave the data streams. SEL Application Guide AG95-10: Configuration and Fast Meter Messages, is a comprehensive description of the SEL binary messages. Below is a description of the messages provided in the SEL-311A Relay. ESSAGE ISTS Binary Message List...
Page 414: Ascii Configuration Message List
Reconfigure peak demand FM on settings change 0300 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 20011205 SEL-311A Instruction Manual...
Page 415: A5C1 Fast Meter Configuration Block
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 465245510000 Analog channel name (FREQ) Date Code 20011205 Configuration, Fast Meter, and Fast Operate Commands SEL-311A Instruction Manual...
Page 416: A5D1 Fast Meter Data Block
# of status flag bytes Scale factors in meter message # of scale factors # of analog input channels # of samples per channel # of digital banks Configuration, Fast Meter, and Fast Operate Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 417 0000 Scale factor offset in Fast Meter message 51422B000000 Analog channel name (QB+) Analog channel type Scale factor type 0000 Scale factor offset in Fast Meter message Date Code 20011205 Configuration, Fast Meter, and Fast Operate Commands SEL-311A Instruction Manual...
Page 418 Scale factor offset in Fast Meter message 51332D000000 Analog channel name (Q3-) Analog channel type Scale factor type 0000 Scale factor offset in Fast Meter message Reserved checksum 1-byte checksum of preceding bytes Configuration, Fast Meter, and Fast Operate Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 419 In response to the A5B9 request, the relay clears the Fast Meter (message A5D1) Status Byte. The SEL-311A 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 420 Operate code, pulse remote bit RB15 Operate code, clear remote bit RB16 Operate code, set remote bit RB16 Operate code, pulse remote bit RB16 Reserved checksum 1-byte checksum of all preceding bytes Configuration, Fast Meter, and Fast Operate Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 421: A5E0 Fast Operate Remote Bit Control
SV4PU = 0 SV4 pickup time = 0 SV4DO = 30 SV4 dropout time is 30 cycles To pulse the contact, send the A5E006430DDB command to the relay. Date Code 20011205 Configuration, Fast Meter, and Fast Operate Commands SEL-311A Instruction Manual...
Page 422: A5E3 Fast Operate Breaker Control
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-311A Relay main board. A5CD Fast Operate Reset Definition Block...
Page 423: Id Message
CID is the 4 digit hexadecimal checksum of the firmware. DEVID is the text from the Relay Identification (RID) setting. DEVCODE is the MODBUS Device ID Code for the SEL-311A. PARTNO is the part number that matches the Model Option Table number.
Page 424 <ETX> is the ETX character (03). the last field in each line is the 4-byte ASCII hex representation of the checksum for the line. "*" indicates an unused bit location. D-12 Configuration, Fast Meter, and Fast Operate Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 425: 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 carriage return. The last row may have fewer than eight strings. SNS message for the SEL-311A is: <STX>"xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","yyyy"<CR> "xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","yyyy"<CR>...
Page 427: Appendix E: Compressed Ascii Commands
APPENDIX E: COMPRESSED ASCII COMMANDS NTRODUCTION The SEL-311A 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 428: Cascii Command-Sel-311A
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-311A OMMAND Display the SEL-311A Relay compressed ASCII configuration message by sending: CAS <CR> The relay sends: <STX> "CAS",6,"01A9"<CR> "CST",1,"01B7"<CR>...
Page 429 "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> "13H","FREQ","SAM/CYC_A","SAM/CYC_D","NUM_OF_CYC","EVENT","LOCATION", "TARGETS","IA","IB","IC","IP","IG","3I2","19AA"<CR> "1D","F","I","I","I","6S","F","22S","I","I","I","I","I","I","0AF2"<CR> "12H","IA","IB","IC","IP","IG","VA(kV)","VB(kV)","VC(kV)","V1MEM","VDC","TRIG", "Names of elements in Relay Word separated by spaces","YYYY"<CR> "256D","I","I","I","I","I","F","F","F","I","F","2S","104S","0ACC"<CR> "CSU",1,"01B8"<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> "15H","EVENT","LOCATION","HOUR_T","MIN_T","SEC_T","MSEC_T","EVENT_ID", "FREQ","GROUP","HOUR_C","MIN_C","SEC_C","MSEC_C","TARGETS","BREAKER", "2266"<CR> "1D","6S","F","I","I","I","I","I","F","I","I","I","I","I","22S","6S","0CA4"<CR> "18H","IA_PF","IA_DEG_PF","IB_PF","IB_DEG_PF","IC_PF","IC_DEG_PF","IP_PF", "IP_DEG_PF","IG_PF","IG_DEG_PF","3I2_PF","3I2_DEG_PF","VA_PF","VA_DEG_PF", "VB_PF","VB_DEG_PF","VC_PF","VC_DEG_PF","2F62"<CR> "1D","I","F","I","F","I","F","I","F","I","F","I","F","F","F","F","F","F","F","0DC3"<CR> Date Code 20011205 Compressed ASCII Commands SEL-311A Instruction Manual...
Page 430: Cstatus Command-Sel-311A
Display history data in compressed ASCII format by sending: CHI <CR> The relay sends: <STX>"FID","yyyy"<CR> "Relay FID string","yyyy"<CR> "REC_NUM","MONTH","DAY","YEAR","HOUR","MIN","SEC","MSEC", "EVENT","LOCATION","CURR","FREQ","GROUP","TARGETS","EVE_ID","yyyy"<CR> xxxx,xxxx,xxxx,xxxx,xxxx,xxxx,xxxx,xxxx,"xxxx",xxxx,xxxx,xxxx,xxxx,xxxx, "xxxx","xxxx","yyyy"<CR><ETX> (the last line is then repeated for each record) Compressed ASCII Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 431: Cevent Command-Sel-311A
"xxxx" are the data values corresponding to the line labels. "yyyy" is the 4-byte hex ASCII representation of the checksum. "FREQ" is the power system frequency at the trigger instant. Date Code 20011205 Compressed ASCII Commands SEL-311A Instruction Manual...
Page 432 RMB6A RMB5A RMB4A 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 LBOKA CBADA RBADA ROKA","yyyy" Compressed ASCII Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 433 Do not display label headers. The relay responds to the CSU command with the nth long summary event report as shown in the example below: <STX>"FID","0143"<CR> "FID=SEL-311A-R100-V0-Z001001-D20000911","08F7"<CR> "MONTH","DAY","YEAR","HOUR","MIN","SEC","MSEC","0ACA"<CR> 03,01,2000,10,39,4,614,"046F"<CR> "EVENT","LOCATION","HOUR_T","MIN_T","SEC_T","MSEC_T","EVENT_ID","FREQ", "GROUP","HOUR_C","MIN_C","SEC_C","MSEC_C","TARGETS","BREAKER", "2148"<CR> Date Code 20011205 Compressed ASCII Commands SEL-311A Instruction Manual...
Page 434 RMB5B RMB4B RMB3B RMB2B RMB1B TMB8B TMB7B TMB6B TMB5B TMB4B TMB3B TMB2B TMB1B LBOKB CBADB RBADB ROKB LBOKA CBADA RBADA ROKA","3C70"<CR> ">","0000000006","0304"<CR> "*","0000000006","02F0" If the specified event does not exist, the relay responds: <STX>"No Data Available","067F"<CR><ETX> Compressed ASCII Commands Date Code 20011205 SEL-311A Instruction Manual...
Page 435: Appendix F: Setting Sel Ogic Control Equations
Relay (see also Settings Sheets 8 through 11 in the back of Section 9). See SHO Command (Show/View Settings) in Section 10: Serial Port Communications and Commands for a list of the factory settings included in a standard shipment of a SEL-311A 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 436 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 20011205 OGIC SEL-311A Instruction Manual...
Page 437: Other Relay Word Bits
Control Equation Operators (Listed in Processing Order) 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 F.1. OGIC Date Code 20011205 Setting SEL Control Equations OGIC SEL-311A Instruction Manual...
Page 438: Sel Ogic Sel Ogic
Following are examples of both. Example of NOT Operator ! Applied to Single Element The internal circuit breaker status logic in the SEL-311A Relay operates on 52a circuit breaker auxiliary contact logic. The SEL control equation circuit breaker status setting is labeled OGIC 52A.
Page 439 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 20011205 Setting SEL Control Equations OGIC SEL-311A Instruction Manual...
Page 440 (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 20011205 OGIC SEL-311A Instruction Manual...
Page 441: All Sel Ogic Control Equations Must Be Set
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 20011205 Setting SEL Control Equations OGIC SEL-311A Instruction Manual...
Page 442: Sel Ogic Control Equation Limitations
51GTC for the overcurrent elements. In the factory settings included in a standard shipment of a SEL-311A Relay, these are all set directly to logical 1. See these factory settings in SHO Command (Show/View Settings) in Section 10: Serial Port Communications and Commands.
Page 443 OGIC SEL-311A 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 445: Overview
(DNP) 3.00 VERVIEW The SEL-311A family of relays are available with the option to support Distributed Network Protocol (DNP) 3.00 L2 Slave protocol. This includes access to metering data, protection elements (Relay Word), contact I/O, targets, sequential events recorder, breaker monitor, relay summary event reports, settings groups, and time synchronization.
Page 446: Data-Link Operation
When the SEL-311A decides to transmit on the DNP link, it has to wait if the physical connection is in use. The SEL-311A monitors physical connections by using CTS input (treated as a Data Carrier Detect) and monitoring character receipt.
Page 447: Device Profile
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-311A Highest DNP Level Supported: Device Function: ¨ Master þ Slave For Requests Level 2...
Page 448 þ Never ¨ Always ¨ Sometimes ¨ Configurable þ Never ¨ Always ¨ Sometimes ¨ Configurable Clear Queue Attach explanation if 'Sometimes' or 'Configurable' was checked for any operation. Distributed Network Protocol (DNP) 3.00 Date Code 20011205 SEL-311A Instruction Manual...
Page 449 ¨ 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-311A settings. Date Code 20011205 Distributed Network Protocol (DNP) 3.00 SEL-311A Instruction Manual...
Page 450: Object Table
BJECT ABLE The supported object, function, and qualifier code combinations are given by the following object table. Table G.2: SEL-311A DNP Object Table Request Response Object (supported) (may generate) Func Qual Func Qual *default Codes Codes Codes Codes Description (dec)
Page 451 16-Bit Frozen Analog Input 32-Bit Frozen Analog Input with Time of Freeze 16-Bit Frozen Analog Input with Time of Freeze 32-Bit Frozen Analog Input without Flag 16-Bit Frozen Analog Input without Flag Date Code 20011205 Distributed Network Protocol (DNP) 3.00 SEL-311A Instruction Manual...
Page 452 Class 0 Data Class 1 Data 1,20,21 6,7,8 Class 2 Data 1,20,21 6,7,8 Class 3 Data 1,20,21 6,7,8 File Identifier Internal Indications index = 7 Storage Object Device Profile Distributed Network Protocol (DNP) 3.00 Date Code 20011205 SEL-311A Instruction Manual...
Page 453: Data Map
Large Packed Binary-Coded Decimal No object 13,14,23 Each version of the SEL-311A has a slightly different data map. The following is the default object map supported by the SEL-311A wye-connected PTs (FID = SEL-311A-Rxxx-VM- Dxxxxxxxx). Table G.3: SEL-311A-Wye DNP Data Map...
Page 454 A-phase MWhr in and out. 30,32 44, 45 B-phase MWhr in and out. 30,32 46, 47 C-phase MWhr in and out. 30,32 48, 49 3-phase MWhr in and out. G-10 Distributed Network Protocol (DNP) 3.00 Date Code 20011205 SEL-311A Instruction Manual...
Page 455 Binary Inputs 500–999 are derived from the Sequential Events Recorder (SER) and carry the time stamp of actual occurrence. Static reads from these inputs will show the same data as a read Date Code 20011205 Distributed Network Protocol (DNP) 3.00 G-11 SEL-311A Instruction Manual...
Page 456 Control Relay Output Blocks (object 12, variation 1) are supported. The control relays correspond to the remote bits and other functions, as shown above. The Trip/Close bits take precedence over the control field. The control field is interpreted as follows: G-12 Distributed Network Protocol (DNP) 3.00 Date Code 20011205 SEL-311A Instruction Manual...
Page 457 DNP has been selected on one of the ports. The DNP command has the following format: DNP [type] where type may be A, B, S, T, or omitted. Date Code 20011205 Distributed Network Protocol (DNP) 3.00 G-13 SEL-311A Instruction Manual...
Page 458 35 1 56 57 58 59 60 61 62 63 64 65 66 67 100 101 102 \<CR> 103<CR> ==>DNP B DNP B DNP B DNP B Enter the new DNP Binary map <CR> ==> G-14 Distributed Network Protocol (DNP) 3.00 Date Code 20011205 SEL-311A Instruction Manual...
Page 459 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 20011205 Distributed Network Protocol (DNP) 3.00 G-15 SEL-311A Instruction Manual...
Page 461: Overview
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-311A 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 462: Synchronization
1/2 cycle. However, in that same example, a security counter set to two on the SEL-311A will delay a bit by 1/4 cycle, because the SEL-311A is receiving new messages each 1/8 cycle from the SEL-321.
Page 463: Loopback Testing
When channel unavailability exceeds a user-settable threshold, the relay will assert a user accessible flag, hereafter called CBADx. Note: The user will typically combine CBADx with other alarm conditions using SEL control equations. OGIC Date Code 20011205 Communications IRRORED SEL-311A Instruction Manual...
Page 464: Mirrored Bits
1 message per 1/4 cycle 9600 1 message per 1/4 cycle 1 message per 1/4 cycle 4800 1 message per 1/2 cycle 1 message per 1/2 cycle enable hardware handshaking (Y,N,MBT) RTSCTS= N Communications Date Code 20011205 IRRORED SEL-311A Instruction Manual...
Page 465 The setting is a mask of 1s, 0s and/or Xs, for RMB1A RMB8A, where X represents the most recently received valid value. – Date Code 20011205 Communications IRRORED SEL-311A Instruction Manual...
Page 466 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. Communications Date Code 20011205 IRRORED SEL-311A Instruction Manual...
Page 467: Appendix I: Unsolicited Fast Ser Protocol
Unsolicited Data Transfer” message to enable the SEL-311A Relay to transmit unsolicited Fast SER messages. 2. When SER records are triggered in the SEL-311A, the relay responds with an unsolicited Fast SER message. If this message has a valid checksum, it must be acknowledged by sending an acknowledge message with the same response number as contained in the original message.
Page 468: 01-Function Code: Enable Unsolicited Data Transfer, Sent From Master To Relay
Upon power-up, the SEL-311A Relay disables it own unsolicited transmissions. This function enables the SEL-311A Relay to begin sending unsolicited data to the device which sent the enable message, if the SEL-311A has such data to transfer. The message format for function code 01 is shown below.
Page 469: 02-Function Code: Disable Unsolicited Data Transfer, Sent From Master To Relay
The function 18 is used for the transmission of unsolicited Sequential Events Recorder (Fast SER) data from the SEL-311A Relay. This function code is also passed as data in the “Enable Unsolicited Data Transfer” and the “Disable Unsolicited Data Transfer” messages to indicate which type of Fast SER data should be enabled or disabled.
Page 470 FFFFFFFE Four-byte end-of-records flag ssssssss Packed four-byte element status for up to 32 elements (LSB for the 1st element) cccc Two-byte CRC-16 checkcode for message Unsolicited Fast SER Protocol Date Code 20011205 SEL-311A Instruction Manual...
Page 471: Acknowledge Message Sent From Master To Relay, And From Relay To Master
Response code (see below) Response number (XX = 00, 01, 02, 03, 00, 01, ...) must match response number from message being acknowledged.) cccc Two byte CRC-16 checkcode for message Date Code 20011205 Unsolicited Fast SER Protocol SEL-311A Instruction Manual...
Page 472 The SEL-311A supports the following response codes: Response Success. Function code not recognized. Examples 1. Successful acknowledge for “Enable Unsolicited Data Transfer” message from a relay with at least one of SER1, SER2, or SER3 not set to NA: A5 46 0E 00 00 00 00 00 00 81 00 XX cc cc (XX is as same as the Response Number in the “Enable Unsolicited Data Transfer”...
Page 473 16 seconds. The relay always requests acknowledgment in Fast SER messages (LSB of the status byte is set). Fast SER messages can be enabled on multiple ports simultaneously. Date Code 20011205 Unsolicited Fast SER Protocol SEL-311A Instruction Manual...
Page 475 SEL-311A Relay Command Summary Access Level 0 The only thing that can be done at Access level 0 is to go to Access Level 1. The screen prompt is: = Command 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 476 SET P n Change Port n settings. SET R Change Sequential Events Recorder (SER) settings. SET T Change text label settings. STA C Resets self-test warnings/failures and reboots relay. Displays version and configuration information. Command Summary Date Code 20011205 SEL-311A Instruction Manual...