Schweitzer Engineering Laboratories SEL-351-5 Instruction Manual
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Schweitzer Engineering Laboratories SEL-351-5 Instruction Manual

Schweitzer Engineering Laboratories SEL-351-5 Instruction Manual

Directional overcurrent relay reclosing relay fault locator integration standard
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Table of Contents

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SEL-351-5, -6, -7 Relay
Directional Overcurrent Relay
Reclosing Relay
Fault Locator
Integration Element Standard
Instruction Manual
20070117
*PM351-02-NB*

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  • Page 1 SEL-351-5, -6, -7 Relay Directional Overcurrent Relay Reclosing Relay Fault Locator Integration Element Standard Instruction Manual 20070117 *PM351-02-NB*...
  • Page 2 SEL products appearing in this document may be covered by US and Foreign patents. Schweitzer Engineering Laboratories, Inc. reserves all rights and benefits afforded under federal and international copyright and patent laws in its products, including without limitation software, firmware, and documentation.

  • Page 3: Table Of Contents

    Section 6: Close and Reclose Logic Close Logic..............................6.2 Reclose Supervision Logic ..........................6.5 Reclosing Relay............................. 6.12 Section 7: Inputs, Outputs, Timers, and Other Control Logic Optoisolated Inputs............................7.2 Local Control Switches ........................... 7.6 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 4 Communications Protocol..........................10.6 Serial Port Automatic Messages ........................10.9 Serial Port Access Levels..........................10.10 Command Summary ............................10.12 Command Explanations ..........................10.14 SEL-351-5, -6, -7 Relay Command Summary Section 11: Front-Panel Interface Overview................................11.1 Front-Panel Pushbutton Operation.........................11.2 Functions Unique to the Front-Panel Interface ....................11.6 Rotating Default Display ..........................11.12 Section 12: Standard Event Reports, Sag/Swell/Interruption Report, and SER Overview................................12.1...
  • Page 5 Data Map ..............................H.14 Point Remapping ............................H.20 Appendix I: M (in Firmware Versions 6 and 7) IRRORED Overview ................................I.1 Operation ................................I.2 Protocol for the Pulsar 9600 Baud Modem ................I.5 IRRORED Settings ................................I.6 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 6 Protocol Operation ............................L.5 Settings................................L.8 Synchrophasor Relay Word Bits ........................L.11 View Synchrophasors by Using the MET PM Command ................L.12 Communications Bandwidth......................... L.14 SEL-351-5, -6, -7 Relay Command Summary SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 7: List Of Tables

    Table 7.9 Mnemonic Settings for Breaker Wear Monitor Values on the Rotating Default Display ..7.47 Table 7.10 Mnemonic Settings for Time-Overcurrent (TOC) Element Pickups on the Rotating Default Display..................7.49 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 8 Equations Associated With U.S. Curves ................9.5 Table 9.4 Equations Associated With IEC Curves .................9.5 Table 9.5 SEL-351-5, -6, -7 Relay Word Bits ..................9.17 Table 9.6 Relay Word Bit Definitions for SEL-5, -6, -7...............9.19 Table 9.7 Main Relay Functions That Change With VSCONN, When PTCONN = WYE ....9.40 Table 9.8...
  • Page 9 SEL-351 Global Settings for Synchrophasors ...............L.8 Table L.6 SEL-351 Serial Port Settings for Synchrophasors ..............L.8 Table L.7 Time Synchronization Relay Word Bits................L.11 Table L.8 SEL Fast Message Voltage and Current Selections Based on PHDATAV and PHDATAI...L.14 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 10 This page intentionally left blank...

  • Page 11: List Of Figures

    Jumper, Connector, and Major Component Locations on the Extra I/O Board (Model 0351x1, Screw-Terminal Block Version)............. 2.36 Figure 3.1 Levels 1 Through 4 Phase Instantaneous Overcurrent Elements ........... 3.2 Figure 3.2 Levels 5 Through 6 Phase Instantaneous Overcurrent Elements ........... 3.2 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 12 Internal Enables (32VE and 32IE) Logic for Zero-Sequence Voltage-Polarized and Channel IN Current-Polarized Directional Elements..........4.19 Figure 4.8 Internal Enable (32NE) Logic for Zero-Sequence Voltage-Polarized Directional Elements (Low-Impedance Grounded, Petersen Coil-Grounded, and Ungrounded/High-Impedance Grounded Systems) ...........4.20 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 13 Figure 6.8 Sequence Coordination Between the SEL-351 and a Line Recloser ........6.27 Figure 6.9 Operation of SEL-351 Shot Counter for Sequence Coordination With Line Recloser (Additional Settings Example 1) ..................6.28 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 14 Demand Current Logic Outputs ...................8.25 Figure 8.14 Raise Pickup of Residual Ground Time-Overcurrent Element for Unbalance Current ..8.26 Figure 9.1 U.S. Moderately Inverse Curve: U1 ..................9.7 Figure 9.2 U.S. Inverse Curve: U2 ......................9.8 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 15 Read (Open) File ........................B.20 Figure B.20 Page Cannot Be Displayed Window ..................B.20 Figure F.1 Minimum Response Time Added to a Negative-Sequence Time-Overcurrent Element 51QT........................F.2 Figure F.2 Distribution Feeder Protective Devices.................. F.4 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 16 Figure L.2 Waveform at Relay Terminals May Have a Phase Shift ............L.4 Figure L.3 Correction of Measured Phase Angle ..................L.4 Figure L.4 Sample MET PM Command Response ................L.13 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 17: Preface

    Preface UInstruction Manual Manual Overview The SEL-351-5, -6, -7 Instruction Manual describes common aspects of protection relay application and use. It includes the necessary information to install, set, test, and operate the relay and more detailed information about settings and commands.

  • Page 18: Table 3.2 Table

    OGIC global, SER, text label, and serial port settings SEL-351-5, -6, -7 Relay Settings Sheets can be photocopied and filled out to set the SEL-351. Note that these sheets correspond to the serial port SET commands listed in Table 9.1.
  • Page 19 Appendix J: SEL-351 Fast SER Protocol ➤ Appendix K: QuickSet SEL-5030 Software ERATOR ➤ Appendix L: SEL Synchrophasors SEL-351-5, -6, -7 Relay Command Summary. Summarizes the serial port commands that are fully described in Section 10: Serial Port Communications and Commands.
  • Page 20 SEL-351. These examples are for demonstration purposes only; the firmware identification information or settings values included in these examples may not necessarily match those in the current version of your SEL-351. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 21 Indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury. DANGER Indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 22 This page intentionally left blank...
  • Page 23 This section includes the following overviews of the SEL-351 Relay: ➤ SEL-351 Models on page 1.2 ➤ Applications on page 1.5 ➤ Hardware Connection Features on page 1.6 ➤ Communications Connections on page 1.12 ➤ Specifications on page 1.13 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 24: Sel-351 Models

    Differences between models 0351x0, 0351x1, and 0351xY show up in references to optoisolated inputs, output contacts, and board jumpers. Figure 2.24–Figure 2.26 Table 2.2–Table 2.7 show the labeling differences between the board jumpers. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 25 “VS” can only be used for synchronism check or as a general-purpose voltage input. See Access Level 2 Commands on page 10.38 for details on the VER command. Instruction Manual SEL-351-5, -6, -7 Relay Date Code20070117...
  • Page 26 “3V0” exceeds the VS channel rating, an external step-down instrumentation transformer may be required. See AC Voltage Inputs on page 1.13 for details on the input ratings. See Figure 2.21 for an example connection that uses a step-down transformer. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 27: Applications

    2.15; e see 2.11; r see Figure 2.12 Figure Figure 2.14 Figure Figure Figure 2.10 Figure 2.18– Figure 2.22; t see Figure 2.16. Figure 1.1 SEL-351 Relays Applied Throughout the Power System Instruction Manual SEL-351-5, -6, -7 Relay Date Code20070117...

  • Page 28: Hardware Connection Features

    VSCONN = 3V0 to accept a broken- delta residual voltage connection. The relay rear-panel markings and the internal connections of terminals Z13 and Z14 are not changed. See Potential Transformer Inputs for details on the broken-delta connection. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 29: Figure 1.2 Inputs, Outputs, And Communications Ports

    OUT107 can operate as an extra alarm. Figure 1.2 Inputs, Outputs, and Communications Ports (Models 0351x0, 0351x1, and 0351xY; Models 0351x1 and 0351xY Have an Extra I/O Board—See Figure 1.3 Figure 1.4) Instruction Manual SEL-351-5, -6, -7 Relay Date Code20070117...
  • Page 30 Table 1.1 for information on SEL-351 models with the high-current interrupting output contact option. See Output Contacts on page 2.10 for more information on the polarity dependence of high-current interrupting output contacts. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 31: Figure 1.3 Extra I/O Board (Model 0351Xy, Plug-In Connector Version; Main Board Shown In Figure 1.2)

    Introduction and Specifications Hardware Connection Features OUT201 OUT202 OUT203 OUT204 OUT205 OUT206 OUT207 OUT208 OUT209 OUT210 OUT211 OUT212 Figure 1.3 Extra I/O Board (Model 0351xY, Plug-In Connector Version; Main Board Shown in Figure 1.2) Instruction Manual SEL-351-5, -6, -7 Relay Date Code20070117...
  • Page 32 Table 1.1 for information on SEL-351 models with the high-current interrupting output contact option. See Output Contacts on page 2.10 for more information on the polarity dependence of high-current interrupting output contacts. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 33 1.11 Hardware Connection Features OUT201 OUT202 OUT203 OUT204 OUT205 OUT206 OUT207 OUT208 OUT209 OUT210 OUT211 OUT212 Figure 1.4 Extra I/O Board (Model 0351x1, Screw-Terminal Block Version; Main Board Shown in Figure 1.2) Instruction Manual SEL-351-5, -6, -7 Relay Date Code20070117...

  • Page 34: Communications Connections

    SEL-351 Relay (#1) SEL-351 Relay (#2) OR . . . Front Panel #C234A Connect to the SEL-351 Port F Port F relays individually via the front-panel serial port Figure 1.5 Communications Connections Examples SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 35: Specifications

    4.1). The 0.2 A nominal channel can also provide non- directional sensitive earth fault (SEF) protection. The 0.05 A nominal neutral channel IN option is a legacy non- directional SEF option. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 36 13 lbs (5.92 kg)—2U rack unit height relay 16 lbs (7.24 kg)—3U rack unit height relay Operating Temperature –40° to +185°F (–40° to +85°C) (LCD contrast impaired for temperatures below –20ºC.) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 37 (0.2 A nominal neutral channel (IN) current input) ±0.001 A and ±5% of setting (0.05 A nominal neutral channel (IN) current input) Time Dial Range: 0.50–15.00, 0.01 steps (US) 0.05–1.00, 0.01 steps (IEC) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 38 Under- and Overfrequency Elements Phase Angle Accuracy: Pickup Range: 40.10–65.00 Hz, 0.01 Hz steps (wye- Steady-State plus connected voltages) Transient Overshoot: ±0.01 Hz (delta connected voltages) ±0.5° Time Delay: 2.00–16,000.00 cycles, 0.25-cycle steps SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 39 ±2.0° over the full temperature range Currents: (1.25–7.50 A; 45–65 Hz) (5 A nominal) (0.25–2.50 A; 45–65 Hz) (1 A nominal) Magnitudes: ±2% Angles: ±1.0° at 25°C ±1.5° over the full temperature range Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 40 This page intentionally left blank...

  • Page 41: Section 2: Installation

    Design your installation using the mounting and connection information in this section. Options include rack or panel mounting and terminal block or ® plug-in connector (Connectorized ) wiring. This section also includes information on configuring the relay for your application. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 42: Relay Mounting

    (69.9 mm) from the front of your panel. This ordering option increases space at the rear of the relay for applications where the relay would ordinarily be too deep to fit your cabinet. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 43: Figure 2.1 Dimensions For Rack-Mount And Panel-Mount Models

    Installation Relay Mounting Figure 2.1 Dimensions for Rack-Mount and Panel-Mount Models Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 44: Front-Panel And Rear-Panel Connection Diagrams

    All 3U-rack-height units can be ordered with terminal block, plug-in connectors, or extra I/O. All 2-U rack height SEL-351-5, -6, -7 models are equipped with terminal blocks only. Other members of the SEL-351 family may be available in a 2-U rack height with plug-in connectors.

  • Page 45: Figure 2.2 Front- And Rear-Panel Drawings-Model 0351X0 Rear And Model 0351X0H Front; Horizontal Rack-Mount Example

    Installation Front-Panel and Rear-Panel Connection Diagrams Figure 2.2 Front- and Rear-Panel Drawings—Model 0351x0 Rear and Model 0351x0H Front; Horizontal Rack- Mount Example Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 46: Figure 2.3 Front- And Rear-Panel Drawings-Model 0351X1Xxxxx2 Rear And Models 0351X1H And 0351Xyh Front; Horizontal Rack-Mount Example

    Figure 2.3 Front- and Rear-Panel Drawings—Model 0351x1xxxxx2 Rear and Models 0351x1H and 0351xYH Front; Horizontal Rack-Mount Example Rear-panel drawing shows standard output contacts on extra I/O board terminals (no polarity markings). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 47: Figure 2.4 Front- And Rear-Panel Drawings-Model 0351Xyxxxxx6 Rear And Models 0351X14 And 0351Xy4 Front; Vertical Panel-Mount Example

    Figure 2.4 Front- and Rear-Panel Drawings—Model 0351xYxxxxx6 Rear and Models 0351x14 and 0351xY4 Front; Vertical Panel-Mount Example Rear panel drawing shows high-current interrupting output contacts on extra I/O board terminals (with polarity markings). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 48: Making Rear-Panel Connections

    The 8-position connectors are coded at the factory to prevent swapping connectors during installation. Step 4. Refer to Figure 2.5 for the standard input/output connector coding. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 49: Figure 2.5 Plug-In Connector Coding (Top View; Model 0351Xy)

    These prewired connectors (and the serial port connector) are unique and may only be installed in one orientation. Model 0351xY OUT101–OUT104 OUT105–ALARM Circuit Board-Mounted Connectors (male) IN101–IN103 IN104–IN106 Figure 2.5 Plug-In Connector Coding (Top View; Model 0351xY) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 50 Model 0351x0 Model 0351x0 can be ordered with standard output contacts only. Refer to the Specifications subsection General on page 1.13 for output contact ratings. Standard output contacts are not polarity dependent. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 51 4 mA of current. Refer to the Specifications subsection General on page 1.13 for optoisolated input ratings. Inputs can be configured to respond to ac or dc control signals via Global settings IN101D–IN106D and IN201D–IN208D. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 52 Note the signal labels (VA, VB, VC, N, VS, NS) on terminals Z09–Z14. Figure 1.2 shows the internal connection for terminals VA, VB, VC, and N. Note also that VS/NS is a separate single-phase voltage input. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 53 3.46). Delta-Connected Voltages (Global Setting PTCONN = DELTA) SEL-351-5, -6, -7 relays with firmware revision R309 (or higher) can be configured via global setting PTCONN = DELTA to accept an open-delta PT connection. Phase-to-phase voltage (up to 150 V or 300 V continuous,...
  • Page 54 VS-NS. See Synchronism Check Elements. SEL-351-5, -6, -7 relays with firmware revisions up to and including R308 function as if VSCONN = VS, although global setting VSCONN is not actually available in these relays. Broken-Delta VS Connection (Global Setting VSCONN = 3V0)

  • Page 55: Figure 2.6 Broken-Delta Secondary Connection To Voltage Input Vs, Wye-Connected Pts

    V , with respect to the wye- connected power system voltages connected to the voltage inputs VA, VB, VC (ABC rotation used in this example). For this scenario of the collapse Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 56: Figure 2.7 Resultant Voltage V

    Delta-Connected PT Example Open-Delta Setting PTCONN = DELTA Open Circuit SEL-351 Relay for Test Broken-Delta Step-Down Transformer Setting VSCONN = 3V0 Figure 2.8 Broken-Delta Secondary Connection to Voltage Input VS, Delta- Connected PTs SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 57: Table 3.4 Table

    SEL for various control. communication applications. Refer to Section 10: Serial Port Communications and Commands for detailed cable diagrams for selected cables (cable diagrams precede Table 10.4). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 58 PORT 1 on models 0351x0, 0351x1, and 0351xY (see Table 10.3). If demodulated IRIG-B time code is input into this connector, it should not be input into SERIAL PORT 2 and vice versa. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 59: Ac/Dc Connection Diagrams For Various Applications

    ). But in this residual connection example, the neutral ground and residual ground overcurrent elements operate the same because I Figure 2.10 Utility Distribution Feeder Overcurrent Protection and Reclosing (Includes Fast Bus Trip Scheme) (Wye-Connected PTs) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 60: Figure 2.11 Distribution Bus Overcurrent Protection (Includes Fast Bus Trip Scheme) (Wye-Connected Pts)

    (serial port communications, optoisolated input assertion, etc.), with desired supervision (e.g., synchronism check). Figure 2.11 Distribution Bus Overcurrent Protection (Includes Fast Bus Trip Scheme) (Wye-Connected PTs) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 61: Figure 2.12 Transmission Line Directional Overcurrent Protection And Reclosing (Wye Connected Pts)

    ). But in this residual connection example, the neutral ground and residual ground overcurrent elements operate the same because I Figure 2.12 Transmission Line Directional Overcurrent Protection and Reclosing (Wye Connected PTs) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 62: Figure 2.13 Transmission Line Directional Overcurrent Protection And Reclosing (Current-Polarization Source Connected To Channel In) (Wye-Connected Pts)

    Separate from Channel IN, the residual ground overcurrent elements operate from the internally derived residual current I = 3I Figure 2.13 Transmission Line Directional Overcurrent Protection and Reclosing (Current-Polarization Source Connected to Channel IN) (Wye-Connected PTs) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 63: Figure 2.14 Delta Wye Transformer Bank Overcurrent Protection (Wye-Connected Pts)

    1.13. See neutral ground overcurrent element pickup specifications in Section 3: Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements. See also the note following Table 4.1. Figure 2.14 Delta Wye Transformer Bank Overcurrent Protection (Wye-Connected PTs) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 64: Figure 2.15 Overcurrent Protection For A Transformer Bank With A Tertiary Winding (Wye-Connected Pts)

    (serial port communications, optoisolated input assertion, etc.), with desired supervision (e.g., hot bus check). Figure 2.15 Overcurrent Protection for a Transformer Bank With a Tertiary Winding (Wye-Connected PTs) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 65: Figure 2.16 Industrial Distribution Feeder Overcurrent Protection (Core-Balance Current Transformer Connected To Channel In)

    Section 3: Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements. See also the note following Table 4.1. Figure 2.16 Industrial Distribution Feeder Overcurrent Protection (Core-Balance Current Transformer Connected to Channel IN) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 66: Figure 2.17 Dedicated Breaker Failure Protection

    I = 3I ). But in this residual connection example, the neutral ground and residual ground overcurrent elements operate the same because I Figure 2.17 Dedicated Breaker Failure Protection SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 67: Figure 2.18 Overcurrent Protection For A High-Impedance Or Low-Impedance Grounded System (Wye-Connected Pts)

    ORDER = U (see Table 4.1–Table 4.3). Nondirectional sensitive earth fault (SEF) protection is also available. Figure 2.18 Overcurrent Protection for a High-Impedance or Low-Impedance Grounded System (Wye-Connected PTs) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 68: Table 1.1 Table

    Directional control for a Petersen Coil-grounded system is selected with setting ORDER containing P (see Table 4.1– Table 4.3). Nondirectional sensitive earth fault (SEF) protection is also available. Figure 2.19 Petersen Coil-Grounded System Overcurrent Protection (Wye-Connected PTs) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 69: Figure 2.20 Ungrounded System Overcurrent Protection (Wye-Connected Pts)

    Directional control for an ungrounded system is selected with setting ORDER = U (see Table 4.1–Table 4.3). Nondirectional sensitive earth fault (SEF) protection is also available. Figure 2.20 Ungrounded System Overcurrent Protection (Wye-Connected PTs) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 70: Figure 2.21 Ungrounded System Overcurrent Protection (Delta-Connected Pts, Broken-Delta 3V0 Connection)

    The polarity of the VS-NS connection should be verified prior to placing the relay into service. See Polarity Check for VSCONN = 3V0 on page 2.15 for a suggested procedure. Figure 2.21 Ungrounded System Overcurrent Protection (Delta-Connected PTs, Broken-Delta 3V0 Connection) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 71: Figure 2.22 Utility Distribution Feeder Overcurrent Protection And Reclosing (Delta Connected Pts And Line-To-Ground Synchronism Check Connection)

    ). But, in this residual connection example, the neutral ground and residual ground overcurrent elements operate the same because I Figure 2.22 Utility Distribution Feeder Overcurrent Protection and Reclosing (Delta Connected PTs and Line-to- Ground Synchronism Check Connection) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 72: Figure 2.23 Utility Distribution Feeder Underfrequency Load Shedding, Overcurrent Protection, And Reclosing (Single Voltage Connection)

    ). But, in this residual connection example, the neutral ground and residual ground overcurrent elements operate the same because I Figure 2.23 Utility Distribution Feeder Underfrequency Load Shedding, Overcurrent Protection, and Reclosing (Single Voltage Connection) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 73: Circuit Board Connections

    Step 13. Replace any cables previously connected to serial ports. Step 14. Replace any rear-panel connectors removed in Step Step 15. Reenergize the relay. Step 16. On Connectorized versions, replace the power connector at rear-panel terminals Z25 and Z26. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 74: Figure 2.24 Jumper, Connector, And Major Component Locations On The Main Board (Models 0351X0, 0351X1, And 0351Xy)

    2.34 Installation Circuit Board Connections JMP2 JMP1 Figure 2.24 Jumper, Connector, and Major Component Locations on the Main Board (Models 0351x0, 0351x1, and 0351xY) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 75: Figure 2.25 Jumper, Connector, And Major Component Locations On The Extra I/O Board (Models 0351Xy, Plug-In Connector Version)

    Installation 2.35 Circuit Board Connections Figure 2.25 Jumper, Connector, and Major Component Locations on the Extra I/O Board (Models 0351xY, Plug-In Connector Version) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 76: Figure 2.26 Jumper, Connector, And Major Component Locations On The Extra I/O Board (Model 0351X1, Screw-Terminal Block Version)

    A b-type output contact is closed when the output contact coil is de-energized and open when the output contact coil is energized. These jumpers are soldered in place. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 77 ALARM output contact. With the jumper in one position, the output contact operates regularly. With the jumper in the other position, the output contact is driven by the same signal that operates the dedicated ALARM output contact (see Table 2.4). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 78 , and PULSE View or set the passwords with the PASSWORD command (see Section 10: Serial Port Communications and Commands). Also controls Fast Operate, Breaker Control, and Open/Close commands (see Appendix SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 79 Accessing the Relay Circuit Boards. Step 3. Set the relay date and time via serial communications port or front panel (see Section 10: Serial Port Communications and Commands Section 11: Front-Panel Interface, respectively). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 80 This page intentionally left blank...

  • Page 81: Section 3: Overcurrent, Voltage, Synchronism Check, Frequency, And Power Elements

    (5 A nominal phase current inputs, IA, IB, IC) ±0.01 A secondary and ±3% of setting 1 A nominal phase current inputs, IA, IB, IC) Timer: ±0.25 cycles and ±0.1% of setting Transient Overreach: ±5% of setting Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 82: Figure 3.1 Levels 1 Through 4 Phase Instantaneous Overcurrent Elements

    I , and I The logic outputs in Figure 3.1 Figure 3.2 are Relay Word bits and operate as follows (Level 1 example shown): SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 83 Figure 3.2). Ideally, set 50P1P > 50P2P > 50P3P > 50P4P so that instantaneous overcurrent elements 67P1–67P4 will display in an organized fashion in event reports (see Figure 3.3 Table 12.3). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 84: Figure 3.3 Levels 1 Through 4 Phase Instantaneous/Definite-Time Overcurrent Elements

    Directional Control Option The phase instantaneous overcurrent element Relay Word bit outputs in Figure 3.1 (50P1, 50P2, 50P3, and 50P4) are inputs into the phase instantaneous/definite-time overcurrent element logic in Figure 3.3. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 85: Table 7.5 Sel Ogic

    67P1/67P1T are enabled and nondirectional. Sometimes SEL control equation torque control settings are set to OGIC provide directional control. See Directional Control Provided by Torque Control Settings on page 4.57. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 86: Figure 3.4 Combined Single-Phase Instantaneous Overcurrent Elements

    ≤ 4: add 0.25 cycle multiples of pickup setting > 4: add 0.50 cycle Maximum Minimum Applied Current (Multiples of Pickup Setting) Figure 3.5 Nondirectional Instantaneous Overcurrent Element Pickup Time Curve SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 87: Figure 3.6 Nondirectional Instantaneous Overcurrent Element Reset Time Curve

    = 0 (logical 0), if I 50CA1 = 1 (logical 1), if I > pickup setting 50PP1P ≤ pickup setting 50PP1P = 0 (logical 0), if I Pickup and Reset Time Curves Figure 3.5 Figure 3.6. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 88: Figure 3.7 Levels 1 Through 4 Phase-To-Phase Instantaneous Overcurrent Elements

    50AB4 ⏐I — I ⏐ Level 4 (Setting 50BC4 ⏐I — I ⏐ E5OP ≥ 4) 50CA4 ⏐I — I ⏐ Figure 3.7 Levels 1 Through 4 Phase-to-Phase Instantaneous Overcurrent Elements SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 89: Figure 3.8 Levels 1 Through 4 Neutral Ground Instantaneous/Definite-Time Overcurrent

    Word Settings Levels Bits Level 5 50N5P 5ON5 (Setting E5ON ≥ 5) 50N6P Level 6 5ON6 (Setting E5ON = 6) Figure 3.9 Levels 5 Through 6 Neutral Ground Instantaneous Overcurrent Elements Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 90 Two additional levels of residual ground instantaneous Instantaneous/ overcurrent elements (Levels 5 and 6) are also available. The different levels Definite-Time are enabled with the E50G enable setting, as shown in Figure 3.10 Figure 3.11. Overcurrent Elements SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 91: Figure 3.10 Levels 1 Through 4 Residual Ground Instantaneous/Definite-Time Overcurrent

    Settings Levels Bits Level 5 50G5P 5OG5 (Setting E5OG ≥ 5) 50G6P Level 6 5OG6 (Setting E5OG = 6) (Residual) Figure 3.11 Levels 5 Through 6 Residual Ground Instantaneous Overcurrent Elements Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 92 To understand the operation of Figure 3.12 Figure 3.13, follow the explanation given for Figure 3.1, Figure 3.2, and Figure 3.3 Phase Instantaneous/Definite-Time Overcurrent Elements on page 3.1, substituting SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 93 ±0.01 A secondary and ±3% of setting (1 A nominal phase current inputs, IA, IB, IC) Timer: ±0.25 cycles and ±0.1% of setting Transient Overreach: ±5% of setting Pickup and Reset Time Curves Figure 3.5 Figure 3.6. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 94: Figure 3.12 Levels 1 Through 4 Negative-Sequence Instantaneous/Definite-Time Overcurrent

    Enabled Word Levels Settings Bits Level 5 50Q5P 5OQ5 (Setting E5OQ ≥ 5) Level 6 50Q6P 5OQ6 (Setting E5OQ = 6) Figure 3.13 Levels 5 Through 6 Negative-Sequence Instantaneous Overcurrent Elements SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 95: Time-Overcurrent Elements

    1 (=1)—see note torque control settings (e.g., 51PTC) cannot be set directly to logical 0. control setting Section 9: Setting the Relay for additional time-overcurrent element setting information. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 96: Figure 3.14 Phase Time-Overcurrent Element 51Pt (With Directional Control Option)

    Phase time-overcurrent Tripping and other control appli- element is timed out on its curve. cations. See Trip Logic. 51PR Phase time-overcurrent Element reset testing or other element is fully reset. control applications. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 97 If logic point TCP = logical 1, the Torque Control Switch is closed and maximum phase current, I , is routed to the pickup comparator (setting 51PP) and the curve timing/reset timing functions. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 98 OGIC provide directional control. See Directional Control Provided by Torque Control Settings on page 4.57. Reset Timing Details (51PT Element Example) Refer to Figure 3.14. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 99: Figure 3.15 A-Phase Time-Overcurrent Element 51At (With Directional Control Option)

    TCA State Switch Position 51ARS = Reset Timing Logical 1 Closed Electromechanical Logical 0 Open 1 Cycle q From Figure 4.24. Figure 3.15 A-Phase Time-Overcurrent Element 51AT (With Directional Control Option) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 100: Figure 3.16 B-Phase Time-Overcurrent Element 51Bt (With Directional Control Option)

    Torque Control Setting TCC State Switch Position 51CRS = Reset Timing Logical 1 Closed Electromechanical Logical 0 Open 1 Cycle Figure 4.24. Figure 3.17 C-Phase Time-Overcurrent Element 51CT (With Directional Control Option) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 101: Figure 3.18 Neutral Ground Time-Overcurrent Element 51Nt (With Directional Control Option)

    Relay Word bits referenced in Table 9.5 or set OGIC equation torque directly to logical 1 (= 1)—see note control setting Section 9: Setting the Relay for additional time-overcurrent element setting information. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 102: Figure 3.19 Residual Ground Time-Overcurrent Element 51Gt (With Directional Control Option)

    TCG1 State Switch Position 51GRS = Reset Timing Logical 1 Closed Electromechanical Logical 0 Open 1 Cycle q From Figure 4.17. Figure 3.19 Residual Ground Time-Overcurrent Element 51GT (With Directional Control Option) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 103 Switch Position 51QRS = Reset Timing sequence overcurrent elements. Logical 1 Closed Electromechanical Logical 0 Open 1 Cycle q From Figure 4.23. Figure 3.20 Negative-Sequence Time-Overcurrent Element 51QT (With Directional Control Option) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 104 ±0.01 A secondary and ±3% of setting (1 A nominal phase current inputs, IA, IB, IC) Curve Timing: ±1.50 cycles and ±4% of curve time for currents between (and including) 2 and 30 multiples of pickup SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 105: Voltage Elements

    0.00–300.00 V secondary 27C1 {300 V voltage inputs} 3P27 = 27A1 * 27B1 * 27C1 27A2 27P2P 0.00–150.00 V secondary 27B2 {150 V voltage inputs} 0.00–300.00 V secondary 27C2 {300 V voltage inputs} Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 106 59QP 0.00–100.00 V secondary {150 V voltage inputs} 0.00–200.00 V secondary {300 V voltage inputs} 59V1 59V1P 0.00–150.00 V secondary {150 V voltage inputs} 0.00–300.00 V secondary {300 V voltage inputs} SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 107 0.00–150.00 V secondary 59BC2 {150 V voltage inputs} 0.00–300.00 V secondary 59CA2 {300 V voltage inputs} 59QP Figure 3.24 0.00–60.00 V secondary {150 V voltage inputs} 0.00–120.00 V secondary {300 V voltage inputs} Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 108: Figure 3.21 Single-Phase And Three-Phase Voltage Elements (Wye-Connected Pts)

    Bits 27P1P 27A1 27B1 27C1 3P27 27P2P 27A2 27B2 27C2 59A1 59B1 59C1 59P1P 3P59 59A2 59B2 59C2 59P2P Figure 5.6. Figure 3.21 Single-Phase and Three-Phase Voltage Elements (Wye- Connected PTs) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 109: Figure 3.22 Phase-To-Phase And Sequence Voltage Elements (Wye-Connected Pts)

    Bits 27PP 27AB 27BC 27CA 59AB 59BC 59CA 59PP To POTT Logic 59N1 59N1P 59N2 59N2P 59QP 59V1 59V1P Figure 5.6. Figure 3.22 Phase-to-Phase and Sequence Voltage Elements (Wye- Connected PTs) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 110: Figure 3.23 Phase-To-Phase Voltage Elements (Delta-Connected Pts)

    Figure 5.6. Figure 3.23 Phase-to-Phase Voltage Elements (Delta-Connected PTs) Relay Settings/ To POTT Logic Word Voltages Bits 59QP 59Q2 59Q2P 59V1 59V1P Figure 5.6. Figure 3.24 Sequence Voltage Elements (Delta-Connected PTs) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 111: Figure 3.25 Channel Vs Voltage Elements (Wye- Or Delta-Connected Pts)

    27B1, and 27C1 are asserted (27A1 = 1, 27B1 = 1, and 27C1 = 1) 0 (logical 0), if at least one of the Relay Word bits 27A1, 27B1, or 27C1 is deasserted (e.g., 27A1 = 0) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 112 (if the settings are applicable). If the weak-infeed portion of the POTT logic is not enabled, these voltage elements can be used in any desired application. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 113: Synchronism Check Elements

    (300 V voltage inputs) 25VHI high voltage threshold for 0.00–150.00 V secondary “healthy voltage” window (150 V voltage inputs) 0.00–300.00 V secondary (300 V voltage inputs) 25SF maximum slip frequency 0.005–0.500 Hz Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 114 Settings SYNCP = 0 and SYNCP = VAB are effectively the same (voltage is directly synchronism checked with voltage V does not lag ). The relay will display the setting entered (SYNCP = VAB or SYNCP = 0). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 115 The voltage across terminals VB-N (or VB-VC for delta) is synchronism checked with the voltage across terminals VS-NS (see Figure 1.2, Figure 2.10–Figure 2.13, Figure 2.22, and Figure 2.23). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 116: Figure 3.26 Synchronism Check Voltage Window And Slip Frequency Elements

    Slip Frequency Absolute Value Frequency Element Setting Maximum Slip Frequency 25SF q See bottom of Figure 3.27; w to Figure 3.27. Figure 3.26 Synchronism Check Voltage Window and Slip Frequency Elements SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 117 Check Element 2 Maximum Angle 2 25A2 25ANG2 Angle Difference Increasing Last Check of Setting OGIC 79CLS (w) q From Figure 3.26; w see Figure 6.2. Figure 3.27 Synchronism Check Elements Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 118 240°). For more information on setting SYNCP with an angle setting, see Application Guide titled Compensate for Constant Phase Angle Difference in Synchronism Check with the SEL-351 Relay Family. Synchronism Check Refer to Figure 3.26 Figure 3.27. Elements Operation SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 119 (59VP, 59VS, and 59VA asserted to logical 1) and the SEL control equation setting OGIC BSYNCH (Block Synchronism Check) is deasserted (= logical 0). The Slip Frequency Calculator output is: Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 120 25SF (Relay Word bit SF is asserted). Voltages V and V Are “Static” Refer to top of Figure 3.27. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 121 “slipping” with respect to one another. Thus, synchronism check elements 25A1 or 25A2 assert to logical 1 if the Angle Difference is less than corresponding maximum angle setting 25ANG1 or 25ANG2. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 122: Figure 3.28 Angle Difference Between V

    If the slip frequency is greater than 0.005 Hz and breaker close time setting TCLOSD ≠ 0.00, the Angle Difference Calculator takes the breaker close time into account with breaker close time setting TCLOSD (set in cycles; see SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 123 V Synchronism Check Element Outputs Synchronism check element outputs (Relay Word bits 25A1 and 25A2 in Figure 3.27) assert to logical 1 for the conditions explained in the following text. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 124 Refer to the top of Figure 6.2. If timer 79CLSD is set to zero (79CLSD = 0.00), SEL control equation setting 79CLS OGIC (Reclose Supervision) is checked only once to see if it is SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 125 (25 degrees) than for an automatic reclose (15 degrees). A single output contact (e.g., OUT102 = CLOSE) can provide the close function for both automatic reclosing and manual closing (see Figure 6.1 logic output). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 126: Frequency Elements

    Figure 3.29 Undervoltage Block for Frequency Elements (Group Setting VNOM ≠ OFF) to Frequency Element Logic (q) Setting 27B81P Relay Word Voltages Wye/Delta 27B81 VA/VAB Figure 3.31. Figure 3.30 Undervoltage Block for Frequency Elements (Group Setting VNOM = OFF) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 127: Figure 3.31 Levels 1 Through 6 Frequency Elements

    (Setting E81 = 6) 81D6T 81D6P ≥ NFREQ 81D6P < NFREQ Underfrequency q From Figure 3.29 Figure 3.30; w 81D1–81D6 are for testing purposes only. Figure 3.31 Levels 1 Through 6 Frequency Elements Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 128 60 Hz (nominal system frequency is 60 Hz) NFREQ = E81 ≥ 1 (enable frequency element 1) 61.25 Hz (frequency element 1 pickup) 81D1P = With these settings: 81D1P ≥ NFREQ SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 129 If system frequency is greater than 59.65 Hz (81D2P = 59.65 Hz), frequency element 2 outputs: 81D2 = logical 0 (instantaneous element) 81D2T = logical 0 (time delayed element) Frequency Element Voltage Control Refer to Figure 3.29, Figure 3.30, and Figure 3.31. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 130 (Relay Word bits 81D1T–81D6T) do not have to be used. Frequency Element The instantaneous frequency elements (81D1–81D6) are used in testing only. Uses The time-delayed frequency elements (81D1T–81D6T) are used for underfrequency load shedding, frequency restoration, and other schemes. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 131: Voltage Sag, Swell, And Interruption Elements (Available In Firmware Version 7)

    Relay Word bit asserts—SW3P. The SW elements remain asserted until the magnitude of the corresponding voltage drops and remains below the swell dropout threshold for one cycle. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 132: Figure 3.33 Voltage Swell Elements

    (must first set ESSI = Y) (Sheet 1 of 2) Settings Definition Range Default VINT Percentage of memory voltage OFF, 5 to 95 percent 10.00% compared to phase-to-neutral of reference voltage, Vbase or phase-to-phase voltage to assert INT elements SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 133 The use of a VSAG setting higher than 90 percent, at the same time as a VSWELL setting lower than 110 percent, should be carefully considered. Moving these thresholds too close together increases the probability that an Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 134: Figure 3.35 Vbase Tracking Example (Three-Phase Disturbance, Wye Connected)

    ➤ are all greater than 43.3 V secondary (delta connected) ➤ control equation setting FAULT is deasserted OGIC ➤ |V1| is within three percent of the calculated Vbase value (wye connected) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 135 Use the SSI R (reset) command once normal system voltages are restored on the voltage terminals. Powering up the relay automatically performs this reset. Resetting the SSI Recorder Logic on page 12.39 for more details. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 136: Power Elements (Available In Firmware Version 7)

    0.00–16000 cycles, in 0.25-cycle steps PWR3D, PWR4D delay The power element type settings are made in reference to the load convention: ➤ +WATTS: positive or forward real power ➤ –WATTS: negative or reverse real power SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 137 67P1 a few quarter-cycles before 3PWR1 deasserts. Without this timer, an incorrect trip operation may occur. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 138 Open-delta connected voltages (PTCONN = DELTA), with properly configured broken-delta 3V0 connection (VSCONN = 3V0): any conditions ➤ Open-delta connected voltages, without broken-delta 3V0 connection (VSCONN = VS): balanced conditions only SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 139: Figure 3.36 Single-Phase Power Elements Logic (+Vars Example Shown)

    Sufficient Signal = 1, 2, 3, or 4 = 1 A sec or 5 A sec Repeat for Phases B and C Figure 3.36 Single-Phase Power Elements Logic (+VARS Example Shown) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 140: Figure 3.37 Three-Phase Power Elements Logic

    Figure 3.38 Power Elements Operation in the Real/Reactive Power Plane Figure 3.36, an example is shown with setting PWRnT = +VARS. This corresponds to the settings PWR1P (pickup) and PWR1T (type) in Figure 3.38. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 141: Figure 3.39 Sel-351(B) Provides Var Control For 9600 Kvar Capacitor Bank

    (closes circuit breaker 52-C) or takes it off-line (trips circuit breaker 52-C) according to the measured VAR level. The SEL-351(B) also provides bus overcurrent protection and trips circuit breaker 52-B for a fault on the 21.6 kV bus. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 142 (leading) for demonstration convenience in Figure 3.39. Figure 3.40 shows the per unit VAR levels for putting on-line (closing circuit breaker 52-C) or taking off-line (tripping circuit breaker 52-C) the capacitor bank. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 143: Figure 3.40 Per Unit Setting Limits For Switching 9600 Kvar Capacitor Bank On- And Off-Line

    Convert the per unit VAR levels 0.3 and –1.2 to single-phase VA (voltamperes) secondary: 0.3 • 80.0 VA secondary (single-phase) = 24.0 VA secondary (single- phase) –1.2 • 80.0 VA secondary (single-phase) = –96.0 VA secondary (single- phase) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 144 PWR1D = 3PWR2P = 288.0 –VARS PWR1T = PWR1D = _____ The exact implementation of this capacitor close and trip logic in SEL OGIC control equations in the SEL-351(B) is not shown. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 145: Section 4: Loss-Of-Potential, Load Encroachment, And Directional Element Logic

    Inputs Description three-pole open condition (indicates circuit breaker open condition see Figure 5.3) positive-sequence voltage (V secondary) positive-sequence current (A secondary) zero-sequence current (A secondary) zero-sequence voltage (V secondary) {wye-connected PTs} Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 146 VA, VB, and VC, because these directional elements use the 3V zero-sequence voltage that comes directly from voltage input VS, rather than the zero-sequence voltage calculated from SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 147 LOP asserts to logical 1 for a loss-of-potential condition) but does not disable any voltage-based directional elements (as occurs with ELOP = Y or Y1) or enable overcurrent elements set direction forward (as occurs with ELOP = Y). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 148: Load-Encroachment Logic

    Positive-Sequence Threshold = (Phase Channels Nominal Rating) • (0.1) (90˚) ZLIN (Load In Region) ZLOUT (Load Out Region) (180˚) (0˚) Example Settings (270˚) (—90˚) q To Figure 4.21. Figure 4.2 Load-Encroachment Logic SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 149 Power Factor (Forward Load): 0.90 lag to 0.95 lead Power Factor (Reverse Load): 0.80 lag to 0.95 lead CT ratio: 2000/5 = 400 PT ratio: 134000/67 = 2000 The PTs are connected line-to-neutral. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 150 Setting NLAR = 180° + cos (0.80) = 180° + 37° = 217° Apply Load-Encroachment Logic to a Nondirectional Phase Time- Overcurrent Again, from Figure 4.2: ZLOAD = ZLOUT + ZLIN SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 151: Figure 4.3 Migration Of Apparent Positive-Sequence Impedance For A Fault Condition

    51PT (51PT loses its sensitivity when an LOP condition occurs): !ZLOAD * !LOP + 50P6 = !ZLOAD * NOT[LOP] + 50P6 = 51PTC = !ZLOAD * NOT[logical 1] + 50P6 = 50P6 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 152 SEL-321. The SEL-351 does not have phase distance elements, but the principles and settings example are still applicable to the SEL-351. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 153: Directional Control For Neutral Ground And Residual Ground Overcurrent Elements

    Channel IN current-polarized directional element ➤ Zero-sequence voltage-polarized directional element (low- impedance grounded system) ➤ Wattmetric and incremental conductance directional elements (Petersen Coil-grounded system) ➤ Zero-sequence voltage-polarized directional element (ungrounded/high-impedance grounded system) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 154: Figure 4.4 General Logic Flow Of Directional Control For Neutral Ground And Residual Ground

    3.19; h Figure 3.10; 3.18; k 3.8; l Figure Figure Figure 4.5. Figure 4.4 General Logic Flow of Directional Control for Neutral Ground and Residual Ground Overcurrent Elements (Excluding Ungrounded/High-Impedance Grounded Systems) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 155: Figure 4.5 General Logic Flow Of Directional Control For Neutral Ground And Residual Ground Overcurrent Elements (Ungrounded/High-Impedance Grounded Systems; Order

    See Figure 3.8, Figure 3.9, and Figure 3.18 Zero-sequence 32NE Figure 2.18, accompanying setting ranges voltage- (Ungrounded/ Figure 2.20, explanation. polarized High-Impedance) Figure 2.21, (Ungrounded/ Figure 4.8, High-Impedance) Figure 4.14 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 156 32QGE 32VE 32NE (Low- (IN) impedance) 32NE (Petersen Coil) 32QGE 32NE (Petersen Coil) 32QGE 32VE 32NE (Petersen Coil) 32VE 32NE (Petersen Coil) 32VE 32QGE 32NE (Petersen Coil) 32NE (Ungrounded/ High-Imped- ance) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 157: Table 2.5 Table

    Directional Control Settings on page 4.38. Internal Enables Refer to Figure 4.4, Figure 4.5, Figure 4.6, Figure 4.7, and Figure 4.8. Table 4.1 lists the internal enables and their correspondence to the ground directional elements. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 158 1 A nominal) effectively overlaps with the upper detection threshold of neutral channel current I (5 A secondary): CTR/CTRN ≤ (5 A/0.05 A) = 100 (5 A nominal) CTR/CTRN ≤ (5 A/0.01 A) = 500 (1 A nominal) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 159 WYE). If the relay is connected to open-delta PTs (global setting PTCONN = cannot be calculated from the VA, VB, and VC terminals, and the DELTA), 3V directional elements that require zero-sequence voltage are unavailable. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 160 “Review of Ground Fault Protection Methods for Grounded, Ungrounded, and Compensated Distribution System,” by Jeff Roberts, Hector Altuve, and Daqing Hou, presented at the 28th Annual Western Protective Relay Conference, Spokane, Washington, October 22–24, 2001. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 161 Note in Table 4.4 that all the time-overcurrent elements (51_T elements) are controlled by the DIR1 level direction setting. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 162: Figure 4.6 Internal Enables (32Qe And 32Qge) Logic For Negative-Sequence

    Figure 4.9 Figure 4.20; r to Figure 4.20 Figure 4.21; t to Figure 4.9, Table 4.1, and Table 4.2. Figure 4.6 Internal Enables (32QE and 32QGE) Logic for Negative-Sequence Voltage-Polarized Directional Elements SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 163: Figure 4.7 Internal Enables (32Ve And 32Ie) Logic For Zero-Sequence Voltage-Polarized

    Table 4.1, and Table 4.2; t to Figure 4.11, Figure 4.15, and Figure 4.16. Figure 4.7 Internal Enables (32VE and 32IE) Logic for Zero-Sequence Voltage-Polarized and Channel IN Current-Polarized Directional Elements Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 164: Figure 4.8 Internal Enable (32Ne) Logic For Zero-Sequence Voltage-Polarized Directional Elements (Low-Impedance Grounded, Petersen Coil-Grounded, And Ungrounded/High-Impedance Grounded Systems)

    Grounded, and Ungrounded/High-Impedance Grounded Systems) Refer to the setting ideas for SEL setting E32IV, near the back of this OGIC section, especially if setting ORDER = U (ungrounded or high-impedance grounded system). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 165: Figure 4.9 Negative-Sequence Voltage-Polarized Directional Element For Neutral Ground And Residual Ground Overcurrent Elements

    Note: 1∠Z1L = One Ohm at the Positive-Sequence Line Angle q From Table 4.2; w to Figure 4.15 Figure 4.16. Figure 4.9 Negative-Sequence Voltage-Polarized Directional Element for Neutral Ground and Residual Ground Overcurrent Elements Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 166: Figure 4.10 Zero-Sequence Voltage-Polarized Directional Element

    (when global settings VSCONN = VS and PTCONN = WYE) or a measured value (when global setting VSCONN = 3V0). See Zero-Sequence Voltage Sources on page 4.15. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 167: Figure 4.11 Channel In Current-Polarized Directional Element

    Reverse Threshold = —(Channel I Nominal Rating) • (Phase Channels Nominal Rating) • (0.05) q From Table 4.2; w to Figure 4.15 Figure 4.16. Figure 4.11 Channel IN Current-Polarized Directional Element Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 168: Figure 4.12 Zero-Sequence Voltage-Polarized Directional Element (Low-Impedance Grounded Systems)

    (when global settings VSCONN = VS and PTCONN = WYE) or a measured value (when global setting VSCONN = 3V0). See Zero-Sequence Voltage Sources on page 4.15. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 169: Figure 4.13 Wattmetric And Incremental Conductance Directional Elements (Petersen Coil-Grounded Systems)

    (when global settings VSCONN = VS and PTCONN = WYE) or a measured value (when global setting VSCONN = 3V0). See Zero-Sequence Voltage Sources on page 4.15. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 170: Figure 4.14 Zero-Sequence Voltage-Polarized Directional Element (Ungrounded/High-Impedance Grounded Systems)

    (when global settings VSCONN = VS and PTCONN = WYE) or a measured value (when global setting VSCONN = 3V0). See Zero-Sequence Voltage Sources on page 4.15. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 171: Figure 4.15 Routing Of Directional Elements To Residual Ground Overcurrent Elements

    4.9; y from Figure 4.10; u from Figure 4.11; i from Figure 4.12, Figure 4.13, or Figure 4.14; o to Figure 4.18. Figure 4.16 Routing of Direction Elements to Neutral Ground Overcurrent Elements Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 172: Figure 4.17 Direction Forward/Reverse Logic For Residual Ground Overcurrent Elements

    Level 4 DIR4 = N DIR4 = R Reverse Reverse 32GR q From Figure 4.15; w Figure 3.19; e Figure 3.10. Figure 4.17 Direction Forward/Reverse Logic for Residual Ground Overcurrent Elements SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 173: Figure 4.18 Direction Forward/Reverse Logic For Neutral Ground Overcurrent Elements

    Level 4 DIR4 = N DIR4 = R Reverse Reverse 32NR q From Figure 4.16; w Figure 3.18; e Figure 3.8. Figure 4.18 Direction Forward/Reverse Logic for Neutral Ground Overcurrent Elements Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 174: Directional Control For Negative-Sequence And Phase Overcurrent Elements

    Internal Enables Refer to Figure 4.6 Figure 4.19. The internal enable 32QE corresponds to the negative-sequence voltage- polarized directional element. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 175 But this disable condition is overridden for the overcurrent elements set direction forward if setting ELOP = Y. Refer to Figure 4.1 and accompanying text for more information on loss-of- potential. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 176 In some applications, level direction settings DIR1 through DIR4 are not flexible enough in assigning the desired direction for certain overcurrent elements. Directional Control Provided by Torque Control Settings on page 4.57 describes how to avoid this limitation for special cases. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 177: Figure 4.20 Negative-Sequence Voltage-Polarized Directional Element For Negative-Sequence And Phase Overcurrent Elements

    If Z2R Setting ≥ 0, Reverse Threshold = 0.75 • Z2R + 0.25 • If Z2R Setting < 0, Reverse Threshold = 1.25 • Z2R + 0.25 • q To Figure 4.22. Figure 4.20 Negative-Sequence Voltage-Polarized Directional Element for Negative-Sequence and Phase Overcurrent Elements Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 178: Figure 4.21 Positive-Sequence Voltage-Polarized Directional Element For Phase Overcurrent Elements

    Setting [fixed at (phase channels nominal rating) • (0.1) when enable setting ELOAD = Y] q From Figure 4.2; w from Figure 4.6; e from Figure 4.1; r to Figure 4.22. Figure 4.21 Positive-Sequence Voltage-Polarized Directional Element for Phase Overcurrent Elements SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 179: Figure 4.22 Routing Of Directional Elements To Negative-Sequence And Phase Overcurrent Elements

    From Figure 4.1; w from Figure 4.20; e from Figure 4.21; r to Figure 4.23; t to Figure 4.24. Figure 4.22 Routing of Directional Elements to Negative-Sequence and Phase Overcurrent Elements Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 180: Figure 4.23 Direction Forward/Reverse Logic For Negative-Sequence Overcurrent Elements

    Level 4 DIR4 = N Relay Word DIR4 = R Reverse 32QR Reverse q From Figure 4.22; w Figure 3.20; e Figure 3.12. Figure 4.23 Direction Forward/Reverse Logic for Negative-Sequence Overcurrent Elements SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 181: Figure 4.24 Direction Forward/Reverse Logic For Phase Overcurrent Elements

    DIR4 = N Relay Word DIR4 = R Reverse Reverse 32PR q From Figure 4.22; w Figure 3.14–Figure 3.17; e Figure 3.3. Figure 4.24 Direction Forward/Reverse Logic for Phase Overcurrent Elements Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 182: Directional Control Settings

    DIR1, DIR2, DIR3, DIR4, ORDER, 50P32P, 50NFP, 50NRP, a0N, 59RES, 32WFP, 32WRP, 32WD, and E32IV (E32IV is a SEL OGIC setting) All these settings are explained in detail in the remainder of this subsection. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 183 67G3T (Figure 3.10) 67Q3T (Figure 3.12) DIR4 67P4 (Figure 3.3) 67N4 (Figure 3.8) 67G4 (Figure 3.10) 67Q4 (Figure 3.12) 67P4T (Figure 3.3) 67N4T (Figure 3.8) 67G4T (Figure 3.10) 67Q4T (Figure 3.12) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 184 DIRn (n = 1–4) settings to be directionally controlled (see Figure 4.17 Figure 4.18). Another example, if setting: ORDER = SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 185 The 50P32P setting is set to pick up for all three-phase faults that need to be covered by the phase overcurrent elements. It supervises the positive-sequence voltage-polarized directional elements F32P and R32P (see Figure 4.21). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 186 Z0R. The same general approach outlined for deriving settings Z0F and Z0R can also be applied to deriving settings Z2F and Z2R in the negative-sequence impedance network, though the preceding method of automatically making settings Z2F and Z2R usually suffices. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 187 ) magnitude has to be greater than 1/10 of the positive-sequence current (I ) magnitude in order for the negative-sequence voltage-polarized directional elements to be enabled | > 0.1 • |I Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 188 ) magnitude in order for the negative-sequence voltage-polarized directional elements to be enabled (|I | > 0.2 • |I |). Again, this presumes at least one of the internal enables 32VE or 32IE is asserted. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 189 The a0 factor increases the security of the zero-sequence voltage-polarized and channel IN current-polarized directional elements. This factor keeps the elements from operating for zero-sequence current (system unbalance), which circulates due to line asymmetries, CT saturation during three-phase faults, etc. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 190 Z0MAG/2 + z (Ω secondary; “z” listed in table below) Relay Configuration z (Ω secondary) 5 A nominal current, 150 V voltage inputs 5 A nominal current, 300 V voltage inputs SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 191 The preceding method of automatically making settings Z0F and Z0R (where both Z0F and Z0R are positive values; still Z0R > Z0F) usually suffices for mostly inductive systems—Figure 4.25 Figure 4.26 just provide a theoretic background. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 192: Figure 4.25 Zero-Sequence Impedance Network And Relay Polarity

    0.2 A nominal neutral channel (IN), then settings 50NFP and 50NRP are not made or displayed. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 193 = standing system unbalance current (zero-sequence; A primary) pri. = maximum load current (positive-sequence; A primary) Adjust the final setting value of a0N from the above derived value of a0N, depending on your security philosophy, etc. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 194 VS-NS input signal. The 32WFP and 32WRP settings must be entered on the same secondary base as the voltage terminals VA, VB, and VC. Settings Considerations for Petersen Coil-Grounded Systems for an example. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 195: Figure 4.27 Zero-Sequence Impedance Network For Ground Fault On Feeder 1

    Petersen Coil Feeder n Feeder 2 Transformer Bank 0(2) Relay 2 Relay 1 0(1) Feeder 1 = 0 (Tuned System) Figure 4.27 Zero-Sequence Impedance Network for Ground Fault on Feeder 1 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 196: Figure 4.28 Wattmetric Element Operation For Ground Fault On Feeder 1

    32WFP and 32WRP in the wattmetric plane (setting 32WFP is put on the “negative” side of the wattmetric plane: i.e., “–32WFP”; see Figure 4.13). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 197 Table 4.5. Thus, when the zero-sequence voltage pickup for the Wattmetric element is known in terms of the system primary voltage level, the required calculation for setting 59RES is Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 198 VS value into the VA, VB, VC voltage base. For our example system, the desired Wattmetric pickup in terms of the voltage applied to channel VS and the current applied to channel IN is: SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 199 IN current-polarized directional elements for directional control of neutral ground and residual ground overcurrent elements. For most applications, set E32IV directly to logical 1: 1 (numeral 1) E32IV = Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 200 … + !3PO (= … + NOT[3PO]) The 3PO dropout time (setting 3POD) provides the extended blocking (3PO = logical 1; !3PO = logical 0) for this momentary current unbalance condition. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 201: Directional Control Provided By Torque Control Settings

    (forward or reverse) or nondirectional. This example shows only Level 1 overcurrent elements (controlled by level direction setting DIR1). The same setting principles apply to the other levels as well. Many variations are possible. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 202 This page intentionally left blank...
  • Page 203 TR) can be set. For example, in a communications-assisted trip scheme, TRCOMM is set with direction forward overreaching Level 2 overcurrent elements, TR is set with direction forward underreaching Level 1 overcurrent Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 204: Section 5: Trip And Target Logic Trip Logic

    Minimum Trip Rising Edge Duration Timer Detect OR-2 TRIP OGIC TDURD Setting ULTR Unlatch Trip Trip Seal-in Serial Port Command Unlatch TAR R Logic {TARGET RESET} Pushbutton TRGTR Figure 5.1 Trip Logic SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 205 OR-1. The OPEN command is no longer directly embedded in the trip logic. This change was made so that users can supervise the OPEN command if desired via setting TR. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 206 RESET} pushbutton and the TAR R (Target Reset) serial port command is also available as Relay Word bit TRGTR. See Figure 5.17 and accompanying text for applications for Relay Word bit TRGTR. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 207 OGIC ULTR = !(51P + 51G) Both time-overcurrent element pickups 51P and 51G must be deasserted before the trip logic unlatches and the TRIP Relay Word bit deasserts to logical 0. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 208 Tripping more than one breaker ➤ Keying an external breaker failure relay ➤ Keying communication equipment in a Direct Transfer Trip scheme Output Contacts on page 7.32 for more information on programming output contacts. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 209: Switch-Onto-Fault (Sotf) Trip Logic

    Logic e SOTFD OGIC Setting Monitor DC Close Bus CLMON Rising Edge Detect 5.6; w 4.1; e Figure Figure Figure 5.1. Figure 5.3 Three-Pole Open Logic (Top) and Switch-Onto-Fault Logic (Bottom) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 210 SEL-351 (see output contact OUT103 example in Output Contacts on page 7.32) or externally. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 211 The directional elements have no voltage for reference and cannot operate. In this case, the instantaneous overcurrent element in the SOTF trip logic should be nondirectional. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 212: Communications-Assisted Trip Logic-General Overview

    These tripping schemes can all work in two-terminal or three-terminal line applications. The DCUB scheme requires separate settings choices for these applications (ECOMM = DCUB1 or DCUB2) because of unique DCUB logic considerations. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 213 Setting TR is typically set with unsupervised Level 1 underreaching overcurrent elements (set direction forward): 67P1 Level 1 directional phase instantaneous overcurrent element 67N1 Level 1 directional neutral ground instantaneous overcurrent element Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 214 SEL-321 and OGIC SEL-351 relays are not operationally different, just labeled differently. The correspondence is: SEL-321 SEL-351 MTCS TRCOMM (Communications-Assisted Trip Conditions) TRSOTF (Switch-Onto-Fault Trip Conditions) (Unconditional or Other Trip Conditions) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 215 Although some of the guides were written for the SEL-321-1 and SEL-311C distance relays, these relays are similar to SEL-351 relays, so the guides will still be helpful in designing SEL-351 applications. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 216: Permissive Overreaching Transfer Trip (Pott) Logic

    Relay OGIC Word bit PT if enable setting ECOMM = POTT. Relay Word bit PT is then an input into the POTT logic in Figure 5.6 (for echo keying). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 217: Figure 5.5 Permissive Input Logic Routing To Pott Logic

    DCUB logic in Figure 5.10). ECTT—Echo Conversion to Trip PT received, converted to a trip condition for a Weak-Infeed Condition (operates as an input into the trip logic in Figure 5.1). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 218 In a three-terminal line scheme, output contact OUT107 is set the same as OUT105 (see Figure 5.9): OUT107 = EKEY—Echo Key Permissive Trip Permissive trip signal keyed by Echo logic (used in testing). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 219: Figure 5.6 Pott Logic

    Trip and Target Logic 5.17 Permissive Overreaching Transfer Trip (POTT) Logic q From 4.1; w from 5.5; e see 3.8; r see 3.10; t Figure Figure Table Table Figure 5.1. Figure 5.6 POTT Logic Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 220: Figure 5.7 Permissive Input Logic Routing To Trip Logic

    Depending on the installation, perhaps one output contact (e.g., OUT105 = KEY) could be connected in parallel to both transmitter inputs (TX) on the 5.9. Then output contact OUT107 can be communication equipment in Figure used for another function. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 221: Figure 5.8 Connections To Communications Equipment For A Two-Terminal Line Pott Scheme

    OUT105 = KEY PT1 = IN104 * IN106 OUT107 = KEY to/from to/from remote remote terminal 1 terminal 2 (—) Figure 5.9 Connections to Communications Equipment for a Three-Terminal Line POTT Scheme Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 222: Directional Comparison Unblocking (Dcub) Logic

    Relay Word bit PT, depending on enable setting ECOMM = DCUB1 or DCUB2. Relay Word bit PT is then an input into the POTT logic in Figure 5.6 (for echo keying). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 223 In three-terminal line DCUB applications (setting ECOMM = DCUB2), UBB1 or UBB2 disable tripping if the loss-of-channel condition (for the respective Channel 1 or 2) continues for longer than time UBDURD. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 224 Relay Word bit UBB, depending on enable setting ECOMM = DCUB1 or DCUB2. Relay Word bit UBB is the unblock block input into the trip logic in Figure 5.1. When UBB asserts to logical 1, tripping is blocked. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 225: Figure 5.10 Dcub Logic

    Trip and Target Logic 5.23 Directional Comparison Unblocking (DCUB) Logic q To Figure 5.11; w to Figure 5.7. Figure 5.10 DCUB Logic Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 226: Figure 5.11 Unblocking Block Logic Routing To Trip Logic

    OUT105 = KEY LOG1 = IN105 To / From TRIP GUARD Remote (RX) (RX) Terminal (—) Figure 5.12 Connections to Communications Equipment for a Two-Terminal Line DCUB Scheme (Setting ECOMM = DCUB1) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 227: Figure 5.13 Connections To Communications Equipment For A Three-Terminal Line Dcub Scheme (Setting Ecomm = Dcub2)

    TRIP GUARD TRIP GUARD Remote Remote (RX) (RX) (RX) (RX) Terminal 1 Terminal 2 (—) Figure 5.13 Connections to Communications Equipment for a Three-Terminal Line DCUB Scheme (Setting ECOMM = DCUB2) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 228: Directional Comparison Blocking (Dcb) Logic

    BTX, is routed to the trip logic in Figure 5.1. Timer Settings Section 9: Setting the Relay for setting ranges. Z3XPU—Zone (Level) 3 Reverse Pickup Time Delay Current-reversal guard pickup timer—typically set at 1 cycle. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 229 Program to an output contact to stop carrier. For example, SEL control OGIC equation setting OUT106 is set: STOP OUT106 = Output contact OUT106 drives a communications equipment transmitter input in a two-terminal line application (see Figure 5.15). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 230: Figure 5.14 Dcb Logic

    Depending on the installation, perhaps one output contact (e.g., OUT105 = DSTRT + NSTRT) can be connected in parallel to both START inputs on the 5.16. Then output contact OUT107 can be communication equipment in Figure used for another function. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 231: Figure 5.15 Connections To Communications Equipment For A Two-Terminal Line Dcb Scheme

    OUT105 = DSTRT + NSTRT OUT106 = STOP BT = IN104 To / From Remote START (TX) STOP (TX) 85CO Terminal (—) Figure 5.15 Connections to Communications Equipment for a Two-Terminal Line DCB Scheme Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 232: Figure 5.16 Connections To Communications Equipment For A Three-Terminal Line Dcb Scheme

    To / From 85CO Remote Remote START STOP (RX) START STOP (RX) Terminal 1 Terminal 2 (TX) (TX) (TX) (TX) (—) Figure 5.16 Connections to Communications Equipment for a Three-Terminal Line DCB Scheme SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 233: Front-Panel Target Leds

    Thus, tripping via the front-panel local control (local bits), serial port (remote bits or OPEN command), or voltage elements is indicated only by the illumination of the TRIP target LED. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 234 (see Figure 5.3). 50 Target LED The 50 target LED illuminates at the rising edge of trip if an instantaneous or definite-time overcurrent element causes the trip. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 235 79 Target LEDs If the reclosing relay is turned off (enable setting E79 = N or 79OI1 = 0), all the Device 79 (reclosing relay) target LEDs are extinguished. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 236: Figure 5.17 Seal-In Of Breaker Failure Occurrence For Message Display

    {TARGET RESET} pushbutton (Relay Word bit TRGTR pulses to logical 1, unlatching SV8 and in turn deasserting DP3). Thus, front-panel rotating default displays can be easily reset along with the front-panel targets by pushing the {TARGET RESET} pushbutton. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 237 8.30. ➤ Voltage Sag, Swell Interruption elements —FAULT is used to suspend the calculation of Vbase. See Voltage Sag, Swell, and Interruption Elements (Available in Firmware Version 7) on page 3.51. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 238 This page intentionally left blank...
  • Page 239 This operation emulates a rotating drum timer style reclosing relay—going onto the next open interval time and reclose opportunity if supervising conditions for the present reclose opportunity are not true. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 240: Section 6: Close And Reclose Logic Close Logic

    (close conditions, other than automatic reclosing) ULCL (unlatch close conditions, other than circuit breaker status, close failure, or reclose initiation) and setting: (Close Failure Time) See the SEL-351-5, -6, -7 Relay Settings Sheets for setting ranges. Reclosing Relay Open Interval Time-Out...
  • Page 241 The factory setting for the Close Failure Timer setting is: 60.00 cycles CFD = See the SEL-351-5, -6, -7 Relay Settings Sheets for setting ranges. Set Close If the Reclosing Relay Open Interval Time-Out logic input at the top of Figure 6.1...
  • Page 242 OUT102 with the following SEL control equation: OGIC Contact for Closing CLOSE OUT102 = Output Contacts on page 7.32 for more information on programming output contacts. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 243: Reclose Supervision Logic

    Reclose Supervision Reclose Supervision condition, Limit Timer times out. Reclose Initiate 79RI 79CLS, to assert to logical 1) q To Figure 6.1. Figure 6.2 Reclose Supervision Logic (Following Open Interval Time-Out) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 244: Figure 6.3 Reclose Supervision Limit Timer Operation (Refer To Bottom Of Figure 6.2)

    Operation open interval time-out) and setting: 79CLSD (Reclose Supervision Limit Time) See the SEL-351-5, -6, -7 Relay Settings Sheets for setting ranges. For Most Applications (Top of Figure 6.2) For most applications, the Reclose Supervision Limit Time setting should be...
  • Page 245 If the reclosing relay increments to the last shot value (no more open intervals left; Figure 6.6 Table 6.3), the reclosing relay is then driven to the Lockout State. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 246 79CLS OGIC indicates successful propagation of a reclosing relay open interval time-out condition on to the close logic in Figure 6.1. Additional Settings Example 2 on page 6.10. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 247: Figure 6.4 Sel-351 Relays Installed At Both Ends Of A Transmission Line In A High-Speed Reclose Scheme

    52/2 to be reclosed. This requires reclose supervision settings: 0.00 cycles (only one check) 79CLSD = 79CLS = 25A1 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 248 The status of synchronism check element 25A1 is checked continuously during the 60-cycle window. If the slipping voltages come into synchronism while timer 79CLSD is timing, synchronism check element 25A1 asserts to logical 1 and reclosing proceeds. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 249 If the reclosing relay increments to the last shot value (no more open intervals left; see Figure 6.6 Table 6.3), the reclosing relay is then driven to the Lockout State. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 250: Reclosing Relay

    Lockout State. Reclosing Relay Figure 6.5 explains in general the different states of the reclosing relay and its operation. States and General Operation SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 251: Figure 6.5 Reclosing Relay States And General Operation

    The reclosing relay goes to the Lockout State if any one of the following occurs: ➤ The shot counter is equal to or greater than the last shot at time of reclose initiation (e.g., all automatic reclosing attempts are unsuccessful—see Figure 6.6). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 252 If the relay happened to be in the Reclose Cycle State and was timing on an open interval before the settings change, the relay would be in the Reclose Cycle State after the settings change, but the relay would immediately go to SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 253 Open Interval 1 time setting 79OI1 = 0.00. then the reclosing relay is defeated, and no automatic reclosing can occur. These settings are explained later in this section. See also the SEL-351-5, -6, -7 Relay Settings Sheets. If the reclosing relay is defeated, the following also occur: ➤...

  • Page 254: Figure 6.6 Reclosing Sequence From Reset To Lockout With Example Settings

    The operation of these timers is affected by SEL control equation settings OGIC discussed later in this section. Also, see the SEL-351-5, -6, -7 Relay Settings Sheets. Open Interval Timers The reclose enable setting, E79, determines the number of open interval time settings that can be set.
  • Page 255 Typically, setting 79RSLD is set less than setting 79RSD. Setting 79RSLD emulates reclosing relays with motor-driven timers that have a relatively short reset time from the lockout position to the reset position. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 256 Relay Word bit asserts to logical 1 (e.g., SH2 = logical 1). The shot counter also increments for sequence coordination operation. The shot counter can increment beyond the last shot for sequence coordination [see Sequence Coordination Setting (79SEQ) on page 6.26]. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 257 SEL-351 sees the circuit breaker close. If a flashover occurs in a circuit breaker tank during an open interval (circuit breaker open and the SEL-351 calls for a trip), the SEL-351 goes immediately to lockout. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 258 (52A = IN101). 79RI = !52A If a 52b breaker auxiliary contact is connected to input IN101 (52A = !IN101), the reclose initiate setting (79RI) remains the same. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 259 Lockout State: !IN102 = !(logical 0) = NOT(logical 0) = logical 1 79DTL = !IN102 + LB3 + OC = (logical 1) + LB3 + OC = logical 1 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 260: Table 6.2 Table

    TRIP * 50P3 + ... 79DTL = Additionally, if the reclosing relay should go to the Lockout State for an underfrequency trip, make settings similar to the following: TRIP * 81D1T + ... 79DTL = SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 261 (79STL = logical 1 still), the 79SKP setting is still processed. Once the trip condition goes away (Relay Word bit TRIP = logical 0), open interval timing can proceed. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 262: Figure 6.7 Reclose Blocking For Islanded Generator

    Figure 6.7 Reclose Blocking for Islanded Generator If the line is energized, channel VS overvoltage element 59S1 can be set to assert. Make the following setting: 59S1 + ... 79STL = SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 263 0. Thus, the 79BRS setting has no effect when the relay is in the Reset or Lockout States. When a circuit breaker is closed from lockout, there could be cold load inrush current that momentarily picks up a Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 264 Reset State and there is a sequence coordination operation, it remains in the Reset State. Factory Settings Example Sequence coordination is not enabled in the factory settings: 79SEQ = SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 265: Figure 6.8 Sequence Coordination Between The Sel-351 And A Line Recloser

    The SEL-351 phase time-overcurrent element 51PT is coordinated with the line recloser fast curve. The SEL-351 single-phase time-overcurrent elements 51AT, 51BT, and 51CT are coordinated with the line recloser slow curve. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 266: Figure 6.9 Operation Of Sel-351 Shot Counter For Sequence Coordination With Line Recloser (Additional Settings Example 1)

    SH1 both are deasserted to logical 0. The shot counter returns to shot = 0 after the reset timer (loaded with reset time 79RSD) times out. Additional Settings Example 2 Review preceding Example 1. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 267 Fault occurs beyond line recloser; w fault cleared by line recloser fast curve; e line recloser recloses into fault; r fault cleared by line recloser slow curve. Figure 6.10 Operation of SEL-351 Shot Counter for Sequence Coordination With Line Recloser (Additional Settings Example 2) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 268 Make sure that reset time setting 79RSD is set long enough to maintain the shot counter at shot = 1 as shown in Figure 6.10. Reclose Supervision Reclose Supervision Logic on page 6.5. Setting (79CLS) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 269 Relay Word bits and SEL control equation settings. See Section 10: OGIC Serial Port Communications and Commands for more information on viewing and making SEL control equation settings (commands SHO L and OGIC SET L). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 270: Optoisolated Inputs

    IN104D IN105D Open IN105 De-energized IN105 Logical 0 IN105D IN106D Open IN106 De-energized IN106 Logical 0 IN106D (—) Figure 7.1 Example Operation of Optoisolated Inputs IN101–IN106 (Models 0351x0, 0351x1, and 0351xY) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 271: Figure 7.2 Example Operation Of Optoisolated Inputs In201-In208- Extra I/O Board (Models 0351X1 And 0351Xy)

    1/4 cycle [e.g., if setting IN105D = 0.13, internally the timer runs at the nearest 1/16 cycle: 2/16 cycles (2/16 = 0.1250)]. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 272: Figure 7.3 Circuit Breaker Auxiliary Contact And Reclose Enable Switch Connected

    [i.e., SEL control equation settings BSYNCH (see Section 3: OGIC Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements), 79RIS (see Section 6: Close and Reclose Logic), and DP2 (see Rotating SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 273 Section 6: Close and Reclose Logic for more information on SEL OGIC control equation setting 79DTL. The pickup/dropout timer for input IN102 (IN102D) is set at: IN102D = 0.50 cycles to provide input energization/de-energization debounce. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 274: Local Control Switches

    Configure any local control switch as one of the following three switch types: Types ON/OFF Switch Local bit LBn is in either the ON (LBn = logical 1) or OFF (LBn = logical 0) position. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 275: Figure 7.5 Local Control Switch Configured As An On/Off Switch

    Disable local control switches by “nulling out” all the label settings for that switch (see Section 9: Setting the Relay). The local bit associated with this disabled local control switch is then fixed at logical 0. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 276: Figure 7.8 Configured Manual Trip Switch Drives Local Bit Lb3

    Local bit LB4 is set to close the circuit breaker in the following SEL OGIC control equation setting: CL = control equation setting CL is for close conditions, other than OGIC automatic reclosing or serial port CLOSE command (see Figure 6.1). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 277 0, regardless of the local bit state before the settings change. 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. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 278: Remote Control Switches

    0) before a settings change or an active setting group change, it comes back in the OFF position (corresponding remote bit is still deasserted to logical 0) after the change. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 279 CON Command (Control Remote Bit) on page 10.38. Appendix G: Setting SEL Control Equations for more details on OGIC using the rising- and falling-edge operators in SEL control equations. OGIC Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 280: Latch Control Switches

    RSTn asserts to logical 1, latch bit LTn deasserts to logical 0. If both settings SETn and RSTn assert to logical 1, setting RSTn has priority and latch bit LTn deasserts to logical 0. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 281: Figure 7.13 Scada Contact Pulses Input In104 To Enable/Disable Reclosing Relay

    !LT1 [= NOT(LT1); drive-to-lockout setting] Relay OGIC Word Setting SET1 (Set) Rising-Edge Detect OGIC Relay Setting Word RST1 IN104 (Reset) Figure 7.14 Latch Control Switch Controlled by a Single Input to Enable/ Disable Reclosing Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 282 IN104D. processing interval. /IN104 is now at logical 0, so setting RST1 does not assert, even though input IN104 remains asserted for at least a few cycles by the SCADA contact. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 283: Figure 7.15 Latch Control Switch Operation Time Line

    Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 284: Figure 7.16 Time Line For Reset Of Latch Bit Lt2 After Active Setting Group Change

    The latch bit states are stored in nonvolatile memory so they can be retained during power loss, settings change, or active setting group change. The Control Switch nonvolatile memory is rated for a finite number of “writes” for all cumulative Settings With Care SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 285: Figure 7.17 Latch Control Switch (With Time Delay Feedback) Controlled By A Single Input To Enable/Disable Reclosing

    SV6PU SV6T SET1 SV6D0 (Set) Rising-Edge Detect OGIC Relay Setting Word RST1 IN104 (Reset) Figure 7.17 Latch Control Switch (With Time Delay Feedback) Controlled by a Single Input to Enable/Disable Reclosing Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 286: Figure 7.18 Latch Control Switch (With Time Delay Feedback) Operation Time Line

    SV6DO SV6PU SV6T SET1 = /IN104 * !SV6T No Effect Processing Interval RST1 = /IN104 * SV6T No Effect Figure 7.18 Latch Control Switch (With Time Delay Feedback) Operation Time Line SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 287: Multiple Setting Groups

    (or remain in) setting Group 3 go to (or remain in) setting Group 4 go to (or remain in) setting Group 5 go to (or remain in) setting Group 6 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 288 (e.g., setting Group 1) to another (e.g., setting Group 4). The SCADA contact is not maintained, just pulsed to switch from one active setting group to another. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 289: Table 6.4 Table

    Setting Group 1 Activated Setting Group 4 Activated SV8 = SG1 SV8 = SG4 SV8T SV8PU SV8PU SV8T Figure 7.20 SEL Control Equation Variable Timer SV8T Used in Setting OGIC Group Switching Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 290 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) available (see Figure 7.1). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 291: Table 7.3 Table

    SEL-351. In this example, optoisolated inputs IN101, IN102, and IN103 on the relay are connected to a rotating selector switch in Figure 7.22. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 292: Figure 7.22 Rotating Selector Switch Connected To Inputs In101, In102, And In103 For Active Setting Group Switching

    TGR in order to change the active setting group to setting Group 4. For such a rotating selector switch application, qualifying time setting TGR is typically set at 180 to 300 cycles. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 293 With settings SS1–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. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 294: Figure 7.23 Active Setting Group Switching (With Rotating Selector Switch) Time Line

    If the individual settings change causes a change in one or more SEL OGIC control equation settings SS1–SS6, the active setting group can be changed, subject to the newly enabled SS1–SS6 settings. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 295 SS1–SS6 before changing the active setting group. If optoisolated inputs IN101 through IN106 are used in settings SS1–SS6, the inputs have their own built-in debounce timer that can help in providing the necessary time qualification (see Figure 7.1). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 296: Sel Ogic Control Equation Variables/Timers

    Settings Bits Settings Bits SV1PU SV4PU SV1T SV4T SV1D0 SV4D0 SV2PU SV5PU SV2T SV5T SV2D0 SV5D0 SV3PU SV6PU SV3T SV6T SV3D0 SV6D0 Figure 7.24 SELOGIC Control Equation Variables/Timers SV1/SV1T Through SV6/SV6T SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 297: Figure 7.25 Selogic Control Equation Variables/Timers Sv7/Sv7T Through Sv16/Sv16T

    Another application idea is dedicated breaker failure protection (see Figure 7.26): Example 1 IN101 (breaker failure initiate) SV6 = (SV7 + IN101) * (50P1 + 50N1) SV7 = SV6T (retrip) OUT101 = SV7T (breaker failure trip) OUT102 = Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 298: Figure 7.26 Dedicated Breaker Failure Scheme Created With Selogic Control Equation

    0 and corresponding timer settings SVnPU and SVnDO load up again after power restoration, settings change, or active setting group Changed, or Active switch. Setting Group Is Changed SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 299 Relay Word bit SV7 being reset to logical 0 (assuming input IN101 is not asserted). Relay Word bit SV7T is also reset to logical 0, and timer settings SV7PU and SV7DO load up again. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 300: Output Contacts

    OUTm coil. Depending on the contact type (a or b), the output contact closes or opens as demonstrated in Figure 7.27. An a-type output contact is open when the output contact coil is SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 301 ALARM output contact Notice in Figure 7.27 coil states (energized or de-energized) and output contact types (a or b) are demonstrated. See Output Contact Jumpers on page 2.36 for output contact type options. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 302: Figure 7.27 Logic Flow For Example Output Contact Operation (Models 0351X0, 0351X1, And 0351Xy)

    2–3) or an extra Alarm output contact (JMP23 in position 1–2). See Table 2.3 Table 2.4 for more information on jumper JMP23. Figure 7.27 Logic Flow for Example Output Contact Operation (Models 0351x0, 0351x1, and 0351xY) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 303: Figure 7.28 Logic Flow For Example Output Contact Operation-Extra I/O Board (Model 0351X1 And 0351Xy)

    See Table 2.2 for more information on selecting output contact type. Figure 7.28 Logic Flow for Example Output Contact Operation—Extra I/O Board (Model 0351x1 and 0351xY) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 304: Rotating Default Display

    The indicating panel lights are not needed if the rotating default display feature in the SEL-351 Relay is used. Figure 7.30 shows the elimination of the Panel Lights Replaced indicating panel lights by using the rotating default display. with Rotating Default Display SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 305: Figure 7.30 Rotating Default Display Replaces Traditional Panel Light Installations

    DP1: (SET L) OGIC DP1 = IN102 Make corresponding, complementary text settings: (SET T) 79 ENABLED DP1_1 = 79 DISABLED DP1_0 = Display point setting DP1 controls the display of the text settings. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 306 This results in the display of corresponding text setting DP2_1 on the front- panel display: BREAKER CLOSED Circuit Breaker Open Figure 7.30, optoisolated input IN101 is de-energized when the 52a circuit breaker auxiliary contact is open, resulting in: SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 307 0 (logical 0) or 1 (logical 1) and the corresponding text setting. For example, if an SEL-351 is protecting a 12 kV distribution feeder, labeled “Feeder 1204,” the feeder name can be continually displayed with the following settings: Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 308 7.30, optoisolated input IN102 is energized to enable the reclosing Figure relay, resulting in: DP1 = IN102 = logical 1 This results in the display of corresponding text setting DP1_1 on the front- panel display: SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 309 These available values cover entered text) on the metering (Table 7.8), breaker wear monitor (Table 7.9), and time-overcurrent element pickups (Table 7.10 Table 7.11). Rotating Default Display Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 310 DPn_0 value to permanently rotate in the display. With the DPn_0 setting problems just discussed, the relay displays the setting text string as it was actually entered, without substituting the intended display value from Table 7.8: SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 311 VB input voltage º VC input voltage º VS input voltage º IG = IA + IB + IC (residual current) º 3I0 = IG (zero-sequence current) º positive-sequence current I1 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 312 M W C C-phase demand megawatts in MWCPI M W C C-phase peak demand megawatts in MW3DI three-phase demand megawatts in MW3PI three-phase peak demand megawatts in MVRADI A-phase demand megavars in SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 313 MWH3O three-phase megawatt-hours out MVRHAI A-phase megavar-hours in MVRHAO A-phase megavar-hours out MVRHBI B-phase megavar-hours in MVRHBO B-phase megavar-hours out MVRHCI C-phase megavar-hours in MVRHCO C-phase megavar-hours out Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 314: Section 8: Breaker Monitor, Metering, And Load Profile Functions

    The DPn logic equation can be set to control the text display—turning it on and off under certain conditions. With the relay set as shown previously, the LCD will show the following: SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 315 (e.g., 51PP, 51AP, 51BP, 51CP, 51NP,51GP, or 51QP). For example, with the factory default settings for 51PP and CTR, setting DP1_0 =::51PP will display 720.00 A pri Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 316: Table 7.7 Sel Ogic

    With the control string set on the even display points “DP2, DP4, DP6, …” and the description set on the odd display points “DP1, DP3, …,” each screen the relay scrolls through will have a description with the value below it. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 317: Table 7.11 Mnemonic Settings For Time-Overcurrent (Toc) Element Pickups Using The Same-Line-Label Format On The Rotating Default Display

    ;;51CP 51CP xxxxxxx.xx ;;51PP 51PP xxxxxxx.xx ;;51GP 51GP xxxxxxx.xx ;;51QP 51QP xxxxxxx.xx ;;51NP 51NP xxxxxxx.xx ;;;000 51AP xxxxxxx ;;;001 51BP xxxxxxx ;;;002 51CP xxxxxxx ;;;003 51PP xxxxxxx ;;;004 51GP xxxxxxx Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 318 (assuming 51PP= 720 A primary, and 51GP = 121.2 A primary): PTO= 720.00AP GND PU 121.20 When IN101 = 0, the following will display on the front-panel display (assuming 51NP= 180 A primary, and 51QP = OFF): SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 319 51ABCD=;;;001;AP DP2_0 = When IN101 = 0, the following will display on the front-panel display (assuming 51AP = 720 A primary, and 51BP = 600 A primary): 51THXYZ= 720A 51ABCD= 600AP Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 320 This page intentionally left blank...

  • Page 321: Overview

    Maximum/Minimum Metering on page 8.30 ➤ Synchrophasor Metering on page 8.32 The SEL-351-5 and SEL-351-6 relays offer a particular reporting feature: Load Profile Report (Available in Firmware Versions 6 and 7) on page 8.33. This section explains these functions in detail.

  • Page 322: Breaker Monitor

    ➤ Set Point 3—number of close/open operations that correspond to the maximum current interruption level. These three points are entered with the settings in Table 8.2. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 323: Figure 8.1 Plotted Breaker Maintenance Points For A 25 Kv Circuit Breaker

    Breaker Monitor, Metering, and Load Profile Functions Breaker Monitor 10,000 1000 6 7 8 9 kA Interrupted per Operation Figure 8.1 Plotted Breaker Maintenance Points for a 25 kV Circuit Breaker Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 324: Table 8.2 Breaker Monitor Settings And Settings Ranges

    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). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 325: Figure 8.2 Breaker Maintenance Curve For A 25 Kv Circuit Breaker

    8.2, note that the breaker maintenance curve levels off horizontally below set point KASP1, COSP1. This is the close/open operation limit of the circuit breaker (COSP1 = 10000), regardless of interrupted current value. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 326: Figure 8.3 Operation Of Sel Ogic Control Equation Breaker Monitor Initiation Setting

    Figure 8.5, 2.5 kA is interrupted 290 times). This is not realistic, but helps in demonstrating the operation of the breaker maintenance curve and how it integrates for varying current levels. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 327 8.12). But the 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. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 328: Figure 8.4 Breaker Monitor Accumulates 10 Percent Wear

    Breaker Monitor, Metering, and Load Profile Functions Breaker Monitor 100% 10,000 1000 6 7 8 9 kA Interrupted per Operation Figure 8.4 Breaker Monitor Accumulates 10 Percent Wear SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 329: Figure 8.5 Breaker Monitor Accumulates 25 Percent Wear

    Breaker Monitor, Metering, and Load Profile Functions Breaker Monitor 100% 10,000 1000 6 7 8 9 kA Interrupted per Operation Figure 8.5 Breaker Monitor Accumulates 25 Percent Wear Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 330: Figure 8.6 Breaker Monitor Accumulates 50 Percent Wear

    8.10 Breaker Monitor, Metering, and Load Profile Functions Breaker Monitor 100% 10,000 1000 6 7 8 9 kA Interrupted per Operation Figure 8.6 Breaker Monitor Accumulates 50 Percent Wear SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 331: Figure 8.7 Breaker Monitor Accumulates 100 Percent Wear

    When the breaker maintenance curve for a particular phase (A, B, or C) reaches the 100 percent wear level (see Figure 8.7), a corresponding Relay Output Word bit (BCWA, BCWB, or BCWC) asserts. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 332 Via Front Panel The information and reset functions available via the previously discussed serial port commands BRE and BRE R are also available via the front-panel {OTHER} pushbutton. See Figure 11.3. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 333 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. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 334: Figure 8.8 Input In106 Connected To Trip Bus For Breaker Monitor Initiation

    BKMON is newly asserted (input IN106 energized), the TRIP Relay Word bit is deasserted. Thus, the current and trip count information is accumulated under externally initiated trips (Ext Trips). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 335: Station Dc Battery Monitor

    In these two examples, OGIC the resultant dc voltage elements are time-qualified by timer SV4T and then routed to output contact OUT106 for alarm purposes. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 336 OUT106 should logically deassert (according to bottom of Figure 8.10), and this is surely what happens for a total loss of power (all output contacts deassert on total loss of power). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 337 (labeled VDC). Via Front Panel The information available via the previously discussed MET serial port command is also available via the front-panel {OTHER} pushbutton. See Figure 11.3. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 338 Also, the Sequential Event Recorder (SER) report can be used to time-tag station dc battery voltage dips [see Sequential Events Recorder (SER) Report on page 12.21]. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 339 Powering the Relay are of no real use. If a “raw” event report is displayed (with the EVE R command), column will display the sampled ac voltage waveform, rather than the average. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 340: Demand Metering

    The current input is at a magnitude of zero and Thermal and Rolling then suddenly goes to an instantaneous level of 1.0 per unit (a “step”). Demand Meters SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 341: Figure 8.11 Response Of Thermal And Rolling Demand Meters To A Step Input

    Thermal Demand Meter Response (EDEM = THM) The response of the thermal demand meter in Figure 8.11 (middle) to the step current input (top) is analogous to the series RC circuit in Figure 8.12. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 342: Figure 8.12 Voltage V

    = 3). The rolling demand meter response is updated every five minutes, after a new five-minute total is calculated. The following is a step-by-step calculation of the rolling demand response example in Figure 8.11 (bottom). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 343 1.0 per unit 0 to 5 minutes 1.0 per unit 5 to 10 minutes 2.0 per unit Rolling demand meter response at “Time = 10 minutes” = 2.0/3 = 0.67 per unit Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 344: Table 8.3 Demand Meter Settings And Settings Range

    Relay Word bit GDEM asserts to logical 1. Use these demand current logic outputs (PDEM, NDEM, GDEM, and QDEM) to alarm for high loading or unbalance conditions. Use in other schemes such as the following example. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 345: Figure 8.13 Demand Current Logic Outputs

    OGIC 51GTC: EDEM = DMTC = GDEMP = 51GP = 1.50 50G5P = 2.30 51GTC = GDEM + GDEM * 50G5 Refer to Figure 8.13, Figure 8.14, and Figure 3.19. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 346: Figure 8.14 Raise Pickup Of Residual Ground Time-Overcurrent Element For Unbalance Current

    51GTC being in the state: OGIC !GDEM + GDEM * 50G5 = NOT(GDEM) + GDEM * 50G5 51GTC = = NOT(logical 1) + (logical 1) * 50G5 = logical 0 + 50G5 = 50G5 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 347 MET D, MET RD, and MET RP are also available via the front-panel {METER} pushbutton. See Figure 11.2. Demand Metering The SEL-351 updates demand values approximately every two seconds. Updating and Storage Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 348 Demand metering peak recording is momentarily suspended when SEL OGIC control equation setting FAULT is asserted (= logical 1). See the explanation for the FAULT setting in Maximum/Minimum Metering on page 8.30. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 349: Energy Metering

    99999 MVARh, it starts over at zero. In firmware versions released prior to November 2002, the SEL-351 relay energy meter registered dollar signs ($$) after reaching the upper metering limit. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 350: Maximum/Minimum Metering

    Therefore, the SEL-351 Metering Update and updates maximum/minimum values only if SEL control equation setting OGIC Storage FAULT is deasserted (= logical 0) and has been deasserted for at least 3600 cycles. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 351 See Appendix A: Firmware and Manual Versions for a list of previous firmware releases. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 352: Synchrophasor Metering

    MET Command (Metering Data) on page 10.19. The MET PM command displays the synchrophasor measurements. For more information, see View Metering Information Synchrophasors by Using the MET PM Command on page L.12. Via Serial Port SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 353: Load Profile Report (Available In Firmware Versions 6 And 7)

    Three-phase demand megaVARs in MVRADO, MVRBDO, MVRCDO Phase demand megaVARs out (wye-connected only) MVR3DO Three-phase demand megaVARs out MWHAI, MWHBI, MWHCI Phase megaWATT hours in (wye-connected only) MWH3I Three-phase megaWATT hours in Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 354 (row 17) at the beginning (top) of the report and the latest row (row 1) at the end (bottom) of the report. Chronological progression through the report is down the page and in descending row number. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 355 ... labeln 07/23/96 07:00:35 xxxxx.xxx xxxxx.xxx xxxxx.xxx xxxxx.xxx xxxxx.xxx ... xxxxx.xxx 07/23/96 08:00:15 xxxxx.xxx xxxxx.xxx xxxxx.xxx xxxxx.xxx xxxxx.xxx ... xxxxx.xxx 07/23/96 09:00:01 xxxxx.xxx xxxxx.xxx xxxxx.xxx xxxxx.xxx xxxxx.xxx ... xxxxx.xxx <ETX> => Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 356 Profile Buffer =>LDP C <Enter> Clear the load profile buffer Are you sure (Y/N) ? Y <Enter> Clearing Complete Changing the LDLIST setting will also result in the buffer being cleared. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 357: Table 9.1 Serial Port Set Commands

    Applications that use wye-connected PTs and have no external zero-sequence voltage source connection do not require changes in the PTCONN and VSCONN settings, so are not affected by the order of setting entry. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 358: Section 9: Setting The Relay Overview

    Setting the Relay Overview ERATOR ® ™ Using the QuickSet SEL-5030 Software to make settings changes handles these details automatically. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 359: Settings Changes Via The Front Panel

    Port settings only. Thus, the corresponding Relay, Global, and Port settings sheets that follow in this section can also be used when making these settings via the front panel. Refer to Figure 11.3 for information on front- panel communications. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 360: Settings Changes Via The Serial Port

    The ALARM contact closes momentarily (for b contact, 7.27), but the EN LED remains on (see opens for an a; see Figure Table 5.1) while the new settings are saved. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 361: Time-Overcurrent Curves

    • ⎝ ⎠ C2 (Very Inverse) Figure 9.7 ⎝ ⎠ – – ⎛ ⎞ ⎛ ⎞ --------------------- --------------------- • • ⎝ ⎠ ⎝ ⎠ C3 (Extremely Inverse) Figure 9.8 – – Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 362 • Figure 9.9 ⎝ ⎠ ⎝ ⎠ – – ⎛ ⎞ ⎛ ⎞ 0.05 4.85 --------------------------- --------------------- • • ⎝ ⎠ ⎝ ⎠ C5 (Short-Time Inverse) Figure 9.10 0.04 – – SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 363: Figure 9.1 U.s. Moderately Inverse Curve: U1

    30 (25) 2.00 15 (12.5) 1.00 6 (5) 0.50 3 (2.5) .5 .6 .7 .8 .9 1 5 6 7 8 9 Multiples of Pickup Figure 9.1 U.S. Moderately Inverse Curve: U1 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 364: Figure 9.2 U.s. Inverse Curve: U2

    30 (25) 2.00 15 (12.5) 1.00 6 (5) 0.50 3 (2.5) .5 .6 .7 .8 .9 1 5 6 7 8 9 Multiples of Pickup Figure 9.2 U.S. Inverse Curve: U2 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 365: Figure 9.3 U.s. Very Inverse Curve: U3

    3.00 15 (12.5) 2.00 1.00 6 (5) 0.50 3 (2.5) .5 .6 .7 .8 .9 1 5 6 7 8 9 Multiples of Pickup Figure 9.3 U.S. Very Inverse Curve: U3 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 366: Figure 9.4 U.s. Extremely Inverse Curve: U4

    15 (12.5) 5.00 4.00 3.00 6 (5) 2.00 3 (2.5) 1.00 0.50 .5 .6 .7 .8 .9 1 6 7 8 9 Multiples of Pickup Figure 9.4 U.S. Extremely Inverse Curve: U4 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 367: Figure 9.5 U.s. Short-Time Inverse Curve: U5

    6.00 5.00 15 (12.5) 4.00 3.00 2.00 6 (5) 1.00 3 (2.5) 0.50 .5 .6 .7 .8 6 7 8 9 Multiples of Pickup Figure 9.5 U.S. Short-Time Inverse Curve: U5 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 368: Figure 9.6 I.e.c. Class A Curve (Standard Inverse): C1

    15 (12.5) 0.10 0.05 6 (5) 3 (2.5) .5 .6 .7 .8 .9 1 5 6 7 8 9 Multiples of Pickup Figure 9.6 I.E.C. Class A Curve (Standard Inverse): C1 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 369: Figure 9.7 I.e.c. Class B Curve (Very Inverse): C2

    0.40 0.30 6 (5) 0.20 3 (2.5) 0.10 0.05 .5 .6 .7 .8 .9 1 6 7 8 9 Multiples of Pickup Figure 9.7 I.E.C. Class B Curve (Very Inverse): C2 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 370: Figure 9.8 I.e.c. Class C Curve (Extremely Inverse): C3

    0.60 3 (2.5) 0.50 0.40 0.30 0.20 0.10 0.05 .5 .6 .7 .8 .9 1 6 7 8 9 Multiples of Pickup Figure 9.8 I.E.C. Class C Curve (Extremely Inverse): C3 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 371: Figure 9.9 I.e.c. Long-Time Inverse Curve: C4

    600 (500) 300 (250) 1.00 0.90 0.80 0.70 0.60 150 (125) 0.50 0.40 0.30 60 (50) 0.20 30 (25) 0.10 0.05 Multiples of Pickup Figure 9.9 I.E.C. Long-Time Inverse Curve: C4 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 372: Figure 9.10 I.e.c. Short-Time Inverse Curve: C5

    0.70 0.60 0.50 0.40 0.30 6 (5) 0.20 3 (2.5) 0.10 0.05 .5 .6 .7 .8 .9 6 7 8 9 Multiples of Pickup Figure 9.10 I.E.C. Short-Time Inverse Curve: C5 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 373: Relay Word Bits (Used In Sel Ogic Control Equations)

    TAR Command (Display Relay Element Status) on page 10.32]. Rows 0 and 1 are reserved for the display of the two front-panel target LED rows. Table 9.5 SEL-351-5, -6, -7 Relay Word Bits (Sheet 1 of 2) Relay Word Bits 50A1 50B1...
  • Page 374 9.18 Setting the Relay Relay Word Bits (Used in SEL Control Equations) OGIC Table 9.5 SEL-351-5, -6, -7 Relay Word Bits (Sheet 2 of 2) Relay Word Bits SV5T SV6T SV7T SV8T SV10 SV11 SV12 SV9T SV10T SV11T SV12T SV13...

  • Page 375: Table 9.6 Relay Word Bit Definitions For Sel-5, -6, -7

    Level 4 BC-phase-to-phase instantaneous overcurrent element (BC-phase-to-phase current above pickup setting 50PP4P; see Figure 3.7) 50CA4 Level 4 CA-phase-to-phase instantaneous overcurrent element (CA-phase-to-phase current above pickup setting 50PP4P; see Figure 3.7) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 376 Negative-sequence current above pickup setting 51QP for Testing, Control negative-sequence time-overcurrent element 51QT (see Figure 3.20) 51QT Negative-sequence time-overcurrent element 51QT timed out (see Tripping Figure 3.20) 51QR Negative-sequence time-overcurrent element 51QT reset (see Figure 3.20) Testing SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 377 Level 3 neutral ground definite-time overcurrent element 67N3T timed out (derived from 67N3; see Figure 3.8) 67N4T Level 4 neutral ground definite-time overcurrent element 67N4T timed out (derived from 67N4; see Figure 3.8) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 378 Level 3 negative-sequence definite-time overcurrent element 67Q3T timed out (derived from 67Q3; see Figure 3.12) 67Q4T Level 4 negative-sequence definite-time overcurrent element 67Q4T timed out (derived from 67Q4; see Figure 3.12) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 379 Reverse negative-sequence voltage-polarized directional element (for ground; see Figure 4.4 Figure 4.9) F32V Forward zero-sequence voltage-polarized directional element (see Figure 4.4 Figure 4.10) R32V Reverse zero-sequence voltage-polarized directional element (see Figure 4.4 Figure 4.10) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 380 (BC-phase-to-phase voltage below pickup setting 27PP; see Figure 3.22) 27CA CA-phase-to-phase instantaneous undervoltage element (CA-phase-to-phase voltage below pickup setting 27PP; see Figure 3.22) 59AB AB-phase-to-phase instantaneous overvoltage element (AB-phase-to-phase voltage above pickup setting 59PP; see Figure 3.22) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 381 Undervoltage element for frequency element blocking (any phase voltage below pickup setting 27B81P; see Figure 3.29 Figure 3.30) Phase instantaneous overcurrent element for load detection (maximum phase current above pickup setting 50LP; see Figure 5.3) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 382 Local Bit 13 asserted (see Figure 7.4) LB14 Local Bit 14 asserted (see Figure 7.4) LB15 Local Bit 15 asserted (see Figure 7.4) LB16 Local Bit 16 asserted (see Figure 7.4) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 383 Latch Bit 13 asserted (see Figure 7.12) LT14 Latch Bit 14 asserted (see Figure 7.12) LT15 Latch Bit 15 asserted (see Figure 7.12) LT16 Latch Bit 16 asserted (see Figure 7.12) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 384 SV10T asserted OGIC (see Figure 7.25) SV11T control equation variable timer output SV11T asserted OGIC (see Figure 7.25) SV12T control equation variable timer output SV12T asserted OGIC (see Figure 7.25) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 385 B-phase fault identification logic output used in B phase targeting (see Front-Panel Target LEDs on page 5.31) C-phase fault identification logic output used in C phase targeting (see Front-Panel Target LEDs on page 5.31) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 386 Output contact OUT104 asserted (see Figure 7.27) OUT103 Output contact OUT103 asserted (see Figure 7.27) OUT102 Output contact OUT102 asserted (see Figure 7.27) OUT101 Output contact OUT101 asserted (see Figure 7.27) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 387 Neutral ground demand current above pickup setting NDEMP (see Figure 8.13) GDEM Residual ground demand current above pickup setting GDEMP (see Figure 8.13) QDEM Negative-sequence demand current above pickup setting QDEMP (see Figure 8.13) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 388 Channel A, received bit 6 RMB5A Channel A, received bit 5 RMB4A Channel A, received bit 4 RMB3A Channel A, received bit 3 RMB2A Channel A, received bit 2 RMB1A Channel A, received bit 1 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 389 Level 2 B-phase power element PWRC2 Level 2 C-phase power element INTC C-phase voltage interruption element (see Figure 3.34) Sag/Swell/Int reporting (only operable INT3P 3-phase interruption element in Firmware Version 7) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 390 (only operable in INTBC Phase-to-phase BC voltage interruption element Firmware Version 7) INTCA Phase-to-phase CA voltage interruption element DELTA Delta configuration element (asserts when global setting PTCONN = DELTA; Indication Figure 9.11) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 391 IBMET Channel IB high-gain mode active (asserts at threshold just below current channel nominal rating) IAMET Channel IA high-gain mode active (asserts at threshold just below current channel nominal rating) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 392 Note in the Lockout State discussion, following Table 6.1, concerning the OC Relay Word bit (OPEN command). See the Note in the Set Close discussion, following Figure 6.1, concerning the CC Relay Word bit (CLOSE command). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 393: Settings Explanations

    Core-balance current transformers are also used for nondirectional sensitive earth fault (SEF) protection (see Figure 2.16). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 394 SEL-351 (the SEL-351 has a negligible burden): 300 feet full-circuit run of #10 AWG (1.0 Ω /1000-ft) 0.30 CT winding of 80 turns at 0.0025 Ω/turn + 0.20 0.50 Ω Total burden SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 395 Equation 9.1. Settings for Voltage SEL-351-5, -6, -7 relays with firmware version R308 or lower can only accept wye-connected PTs to the voltage inputs, and can only use voltage input VS as Input Configuration a synchronism check voltage/auxiliary voltage input. Beginning with firmware revision R309, these relays have two new global settings, PTCONN and VSCONN;...

  • Page 396: Table 9.7 Main Relay Functions That Change With Vsconn, When Ptconn = Wye

    V (Available in Firmware Version 7) on page 3.56 Three-phase power metering No difference (MW3P, MVAR3P, etc.) Uses the sum of the single-phase power calculations from V (primary values) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 397: Table 9.8 Main Relay Functions That Change With Vsconn, When Ptconn = Delta

    Logical 1 Logical 0 Switch B in "up" position when VSCONN = 3V0 Switch B in "down" position when VSCONN = VS Figure 9.11 Operation of DELTA and 3V0 Relay Word Bits Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 398: Table 9.9 Main Relay Functions That Change With Vnom = Off

    PTs are connected to voltage inputs VA-VB-VC-N, make setting PTR the same value as setting PTRS. The ratio of the PTRS and PTR settings (PTRS/PTR) must be less than 1000 and greater than 0.001 when VSCONN = 3V0. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 399: Figure 9.12 Hybrid Power System With Neutral Ground Resistor

    Line impedance (Ω primary) is converted to Ω secondary: Ω primary • (CTR/PTR) = Ω secondary where: CTR = phase (IA, IB, IC) current transformer ratio PTR = phase (VA, VB, VC) potential transformer ratio Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 400 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. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 401: Settings Sheets

    5 A nominal and 1 A nominal ordering options (and additional 0.2 A nominal and 0.05 A nominal options for neutral channel IN) and how they influence overcurrent element setting ranges. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 402 This page intentionally left blank...
  • Page 403 Date _______________ SET.1 of 34 SEL-351-5, -6, -7 Relay Settings Sheets Instruction Manual Relay Settings (Serial Port Command SET and Front Panel) To avoid lost settings, enter global settings first [Global Settings (Serial Port Command SET G and Front Panel) on page SET.24] if global settings PTCONN or VSCONN are going to be changed.
  • Page 404 Directional control (Y, AUTO, N) (see Directional Control Settings on page 4.38) (When VNOM = OFF, setting ELOAD can only be set to “N.”) Load encroachment (Y, N) (see Figure 4.2) ELOAD SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 405 0.05–20.00 A {1 A nom.}) Pickup (OFF, 0.25–100.00 A {5 A nom.}, 50P5P 0.05–20.00 A {1 A nom.}) Pickup (OFF, 0.25–100.00 A {5 A nom.}, 50P6P 0.05–20.00 A {1 A nom.}) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 406 0.050–20.000 A {1 A nom.}, 0.005–2.500 A {0.2 A nom}, 0.005–1.500 A {0.05 A nom.}) Pickup (OFF, 0.250–100.000 A {5 A nom.}, 50N6P 0.050–20.000 A {1 A nom.}, 0.005–2.500 A {0.2 A nom}, 0.005–1.500 A {0.05 A nom.}) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 407 (Number of negative-sequence element time delay settings dependent on preceding enable setting E50Q = 1–6.) Pickup (OFF, 0.25–100.00 A {5 A nom.}, 50Q1P 0.05–20.00 A {1 A nom.}) Pickup (OFF, 0.25–100.00 A {5 A nom.}, 50Q2P 0.05–20.00 A {1 A nom.}) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 408 (Make the following settings if preceding enable setting E51P = 2.) Pickup (OFF, 0.25–16.00 A {5 A nom.}, 51BP 0.05–3.20 A {1 A nom.}) Curve (U1–U5, C1–C5; see Figure 9.1–Figure 9.10) 51BC SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 409 Pickup (OFF, 0.25–16.00 A {5 A nom.}, 51QP 0.05–3.20 A {1 A nom.}) Curve (U1–U5, C1–C5; see Figure 9.1–Figure 9.10) 51QC Time-Dial (0.50–15.00 for curves U1–U5, 51QTD 0.05–1.00 for curves C1–C5) Electromechanical Reset (Y, N) 51QRS Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 410 (Make setting 50P32P if preceding enable settings E32 = Y or AUTO and ELOAD = N.) Phase directional element 3-phase current pickup (0.50–10.00 A {5 A nom.}, 0.10–2.00 A {1 A nom.}) 50P32P SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 411 {150 V voltage inputs; 1 A nom.}) (–128.00 to +128.00 Ω secondary {300 V voltage inputs; 5 A nom.}) (–640.00 to +640.00 Ω secondary {300 V voltage inputs; 1 A nom.}) Reverse directional Z0 threshold Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 412 (OFF, 0.00–150.00 V secondary {150 V voltage inputs}) (OFF, 0.00–300.00 V secondary {300 V voltage inputs}) Zero-sequence (3V0) overvoltage pickup 59N1P (OFF, 0.00–150.00 V secondary {150 V voltage inputs}) (OFF, 0.00–300.00 V secondary {300 V voltage inputs}) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 413 (OFF, 0.00–150.00 V secondary {150 V voltage inputs}) (OFF, 0.00–300.00 V secondary {300 V voltage inputs}) Phase-to-phase undervoltage pickup 27PP2P (OFF, 0.00–150.00 V secondary {150 V voltage inputs}) (OFF, 0.00–300.00 V secondary {300 V voltage inputs}) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 414 Level 3 time delay (2.00–16000.00 cycles in 0.25-cycle steps) 81D3D Level 4 pickup (OFF, 40.10–65.00 Hz) 81D4P Level 4 time delay (2.00–16000.00 cycles in 0.25-cycle steps) 81D4D Level 5 pickup (OFF, 40.10–65.00 Hz) 81D5P SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 415 (OFF, 0.00–16000.00 cycles in 0.25-cycle steps) Echo time delay pickup ETDPU (OFF, 0.00–16000.00 cycles in 0.25-cycle steps) Echo duration time delay EDURD (0.00–16000.00 cycles in 0.25-cycle steps) Weak-infeed enable (Y, N) EWFC Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 416 0.005–0.160 A {0.05 A nom.}) Residual-ground pickup GDEMP (OFF, 0.10–16.00 A {5 A nom.}, 0.02–3.20 A {1 A nom.}) Negative-sequence pickup QDEMP (OFF, 0.50–16.00 A {5 A nom.}, 0.10–3.20 A {1 A nom.}) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 417 SV9 Dropout Time (0.00–16000.00 cycles in 0.25-cycle steps) SV9DO SV10 Pickup Time (0.00–16000.00 cycles in 0.25-cycle steps) SV10PU SV10 Dropout Time (0.00–16000.00 cycles in 0.25-cycle steps) SV10DO SV11 Pickup Time (0.00–16000.00 cycles in 0.25-cycle steps) SV11PU Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 418 (Make setting PWR3P if EPWR = 3–4.) Per Phase Power Element Pickup PWR3P (OFF, 0.33–13000.00 VA secondary per phase {5 A nom}) (OFF, 0.07–2600.00 VA secondary per phase {1 A nom}) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 419 WYE} or Percent Line-to-Line Voltage Sag Pickup {global setting PTCONN = DELTA} (OFF, 10.00–95.00) Percent Phase Voltage Swell Pickup {global setting PTCONN = VSWELL WYE} or Percent Line-to-Line Voltage Swell Pickup {global setting PTCONN = DELTA} (OFF; 105.00–180.00) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 420 Close conditions (other than automatic reclosing or CLOSE command) Unlatch close conditions ULCL Reclosing Relay Equations (See Reclosing Relay on page 6.12) Reclose initiate 79RI Reclose initiate supervision 79RIS Drive-to-lockout 79DTL Drive-to-last shot 79DLS Skip shot 79SKP SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 421 SET11 Reset Latch Bit LT11 RST11 Set Latch Bit LT12 SET12 Reset Latch Bit LT12 RST12 Set Latch Bit LT13 SET13 Reset Latch Bit LT13 RST13 Set Latch Bit LT14 SET14 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 422 B-phase (see Figure 3.16) 51BTC C-phase (see Figure 3.17) 51CTC Phase (see Figure 3.14) 51PTC Neutral Ground (see Figure 3.18) 51NTC Residual Ground (see Figure 3.19) 51GTC Negative-Sequence (see Figure 3.20) 51QTC SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 423 Output Contact OUT106 OUT106 Output Contact OUT107 OUT107 Output Contact Equations for Models 0351x1 and 0351xY—Extra I/O Board (See Figure 7.28) Output Contact OUT201 OUT201 Output Contact OUT202 OUT202 Output Contact OUT203 OUT203 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 424 Display Point DP14 DP14 Display Point DP15 DP15 Display Point DP16 DP16 Setting Group Selection Equations (See Table 7.4) Select Setting Group 1 Select Setting Group 2 Select Setting Group 3 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 425 TMB3B Channel B, transmit bit 4 TMB4B Channel B, transmit bit 5 TMB5B Channel B, transmit bit 6 TMB6B Channel B, transmit bit 7 TMB7B Channel B, transmit bit 8 TMB8B Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 426 Front-panel neutral/ground display (OFF, IN, IG) FPNGD Event Report Parameters (See Section Length of event report (15, 30 cycles) Length of prefault in event report (1 to LER-1 cycles in 1-cycle steps) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 427 Input IN206 debounce time IN206D (AC, 0.00–1.00 cycles in 0.25-cycle steps) Input IN207 debounce time IN207D (AC, 0.00–1.00 cycles in 0.25-cycle steps) Input IN208 debounce time IN208D (AC, 0.00–1.00 cycles in 0.25-cycle steps) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 428 Phasor Data Set, Currents (ALL, NA) PHDATAI = Current Angle Comp. Factor (–179.99 to +180 degrees) ICOMP Time Source Type (IRIG, IEEE) TS_TYPE = EPMU is not available if global setting PTCONN = DELTA. NOTE: SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 429 Phase demand megaWATTs out (wye-connected only) MW3DO Three-phase demand megaWATTs out MVRADI, MVRBDI, MVRCDI Phase demand megaVARs in (wye-connected only) MVR3DI Three-phase demand megaVARs in MVRADO, MVRBDO, MVRCDO Phase demand megaVARs out (wye-connected only) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 430 Three-phase megaWATT hours out MVRHAI, MVRHBI, MVRHCI Phase megaVAR hours in (wye-connected only) MVRH3I Three-phase megaVAR hours in MVRHAO, MVRHBO, MVRHCO Phase megaVAR hours out (wye-connected only) MVRH3O Three-phase megaVAR hours out SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 431 Local Bit LB7 Name (14 characters) NLB7 Clear Local Bit LB7 Label (7 characters) CLB7 Set Local Bit LB7 Label (7 characters) SLB7 Pulse Local Bit LB7 Label (7 characters) PLB7 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 432 Local Bit LB15 Name (14 characters) NLB15 Clear Local Bit LB15 Label (7 characters) CLB15 Set Local Bit LB15 Label (7 characters) SLB15 Pulse Local Bit LB15 Label (7 characters) PLB15 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 433 Display if DP12 = logical 1 (16 characters) DP12_1 Display if DP12 = logical 0 (16 characters) DP12_0 Display if DP13 = logical 1 (16 characters) DP13_1 Display if DP13 = logical 0 (16 characters) DP13_0 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 434 Display if DP16 = logical 0 (16 characters) DP16_0 Reclosing Relay Labels (See Functions Unique to the Front-Panel Interface on page 11.6) Reclosing Relay Last Shot Label (14 char.) 79LL Reclosing Relay Shot Counter Label (14 char.) 79SL SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 435 Set FASTOP = Y to enable binary Fast Operate messages at the serial port. Set FASTOP = N to block binary Fast Operate messages. Refer to Appendix D for the description of the SEL-351 Relay Fast Operate commands. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
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  • Page 437: Overview

    Data Bits = 8 Parity = N Stop Bits = 1 To change the port settings, use the SET P command (see Section 9: Setting Relay) or the front-panel {SET} pushbutton. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 438: Port Connector And Communications Cables

    TIRIG asserts when the relay time is based on an IRIG-B time source. In the event that the relay is not synchronized to a connected IRIG-B time source (TIRIG = logical 0), the troubleshooting steps detailed in the IRI command discussion should be used. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 439: Figure 10.2 Sel-351 To Computer, Cable C234A

    25-Pin Female "D" Subconnector "D" Subconnector Pin # Pin # Func. Func. TXD (IN) DTR (IN) RXD (OUT) CD (OUT) **DCE = Data Communications Equipment (Modem, etc.) Figure 10.4 SEL-351 to Modem Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 440: Table 10.4 Serial Communications Port Pin/Terminal Function Definitions

    Definition No Connection +5 Vdc (0.5 A limit) 5 Vdc Power Connection RXD, RX Receive Data TXD, TX Transmit Data IRIG-B IRIG-B Time-Code Input Ground SHIELD Shielded Ground Request To Send SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 441 Data Set Ready For long-distance communications up to 500 meters and for electrical isolation of communications ports, use the SEL-2800 family of Fiber-Optic Transceivers. Contact SEL for more details on these devices. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 442: Communications Protocol

    (carriage return and line feed). You may truncate commands to the first three characters. For example, EVENT 1 <Enter> would become EVE 1 <Enter>. Upper- and lowercase characters may be used without distinction, except in passwords. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 443 The SEL Distributed Port Switch Protocol (LMD) permits multiple SEL relays to share a common communications channel. The protocol is selected by setting the port setting PROTO = LMD. See Appendix C: SEL Distributed Port Switch Protocol for more information. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 444 (in Firmware Versions 6 and IRRORED SEL Fast Message Synchrophasor Protocol SEL Fast Message Synchrophasor protocol consists of general Fast Messages that transport measured synchrophasor information. The protocol is described Appendix SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 445: Serial Port Automatic Messages

    10.36. Self-Test Warning or Failure The relay sends a status report each time a self-test warn- ing or failure condition is detected. See STA Command (Relay Self-Test Status) on page 10.30. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 446: Serial Port Access Levels

    The BAC command allows the relay to go to Access Level B [see ACC, BAC, and 2AC Commands (go to Access Level 1, B, or 2) for more detail]. Enter the BAC command at the Access Level 1 prompt: =>BAC <Enter> SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 447 =>>SET <Enter> While in Access Level 2, any of the Access Level 1 and Access Level B commands are also available (commands BAC through PUL in Table 10.6). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 448: Table 10.6 Serial Port Command Summary

    => Voltage Sag/Swell/Interruption Report => {STATUS} Relay self-test status => Display relay element status {OTHER} => View/change time {OTHER} => Trigger an event report ==> BRE n Preload/reset breaker wear {OTHER} SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 449 EVE command, where it is the time the event occurred). The serial port command explanations that follow in Command Explanations on page 10.14 are in the same order as the commands listed in Table 10.6. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 450 ). The relay will ask up to three times. If the requested password Password: ? is incorrectly entered three times, the relay closes the ALARM contact for one second and displays an invalid access message. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 451 For more information on M , see IRRORED Appendix I: M (in Firmware Versions 6 and 7). To get a summary IRRORED report, enter the command with the channel parameter (A or B). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 452 Are you sure (Y/N) ? clearing operation with the message . If both M Canceled IRRORED channels are enabled, omitting the channel specifier in the clear command will cause both channels to be cleared. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 453 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 454 OGIC event report trigger condition setting ER PULSE event report generated by execution of the PUL (Pulse) command TRIG event report generated by execution of the TRI (Trigger) command SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 455 To make the extensive amount of meter information manageable, the relay divides the displayed information into five groups: ➤ Instantaneous ➤ Demand ➤ Energy Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 456 (1–32767) to repeat the meter display. If k is not specified, the meter report is displayed once. The output from an SEL-351 with wye-connected voltage inputs is shown: SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 457 Vbase initializing. The Vbase quantity is used in SEL-351-7 relay model. Vbase is always shown as 0.00 kV in SEL-351-5, -6 relay models. Power MW Single-phase megawatts (wye- A,B,C connected voltage inputs only)
  • Page 458 MET D—Demand Metering The MET D command displays the demand and peak demand values of the following quantities: Currents I Input currents (A primary) A,B,C,N Residual ground current (A primary; I SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 459 Reset Time Last time the energy meter was reset To view energy metering values, enter the command: =>MET E <Enter> The output from an SEL-351 with wye-connected voltage inputs is shown: Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 460 Reset the maximum/minimum values using the MET RM command. All values will display until new maximum/minimum values are recorded. RESET For more information on maximum/minimum metering, see Maximum/ Minimum Metering on page 8.30. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 461 -111.764 129.485 Phase Currents Pos. Sequence Current MAG (A) 195.146 192.614 198.090 195.283 ANG (DEG) 114.930 -2.786 -120.238 117.338 FREQ (Hz) 60.029 Digitals SV10 SV11 SV12 SV13 SV14 SV15 SV16 => Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 462 SHO 1 A). Below are sample SHOWSET commands for the SEL-351, showing the factory default settings (firmware version 7; see Table 1.2). The factory default settings for the other SEL-351 versions are similar. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 463 Press RETURN to continue 79SKP =0 79STL =TRIP 79BRS =0 79SEQ =0 79CLS =1 SET1 RST1 SET2 RST2 SET3 RST3 SET4 RST4 SET5 RST5 SET6 RST6 SET7 RST7 SET8 (Continued on next page) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 464 SV13 SV14 SV15 SV16 OUT101=TRIP OUT102=CLOSE OUT103=SV1T OUT104=0 Press RETURN to continue OUT105=0 OUT106=0 OUT107=0 OUT201=0 OUT202=0 OUT203=0 OUT204=0 OUT205=0 OUT206=0 OUT207=0 OUT208=0 OUT209=0 OUT210=0 OUT211=0 OUT212=0 (Continued on next page) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 465 KASP2 = 8.00 KASP3 = 20.00 EPMU => =>SHO P <Enter> Port F PROTO = SEL SPEED = 2400 BITS PARITY= N STOP T_OUT = 15 AUTO RTSCTS= N FASTOP= N => Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 466 Sag/Swell/Interruption Report, and SER. STA Command (Relay Self-Test Status) The STA command displays the status report, showing the relay self-test information. To view a status report, enter the command: =>STA n <Enter> SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 467 STA C command from Access Level 2: =>>STA C <Enter> The relay responds: Reboot the relay and clear status Are you sure (Y/N) ? If you select N or n, the relay displays: Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 468 Clears front-panel tripping target LEDs TRIP, INST, COMM, SOTF, 50, 51, 81, A, B, C, G, and N. Unlatches the trip logic for testing purposes (see Figure 5.1). Shows Relay Word Row 0. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 469: Table 10.7 Sel-351 Relay Word And Its Correspondence To Tar Command

    <Enter>. Separate the hours, minutes, and seconds with down the relay or the new setting may colons, semicolons, spaces, commas, or slashes. To set the clock to 23:30:00, be lost. enter: Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 470 Section 12: Standard Event Reports, Sag/Swell/Interruption Report, and for more information on event reports. Access Level B Commands BRE n Command (Preload/Reset Breaker Wear) Use the BRE W command to preload breaker monitor data. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 471 84.8 kA Ext Trips= 0.3 IB= 0.8 IC= 1.5 kA Percent wear: A= 17 B= 3 C= LAST RESET 03/26/02 13:57:42 ==> Use the BRE R command to reset the breaker monitor: Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 472 Active Group = 2 ==> 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-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 473 Aborted: No Breaker Jumper PUL Command (Pulse Output Contact) The PUL command allows you to pulse any of the output contacts for a specified length of time. The command format is: PUL x y Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 474: Table 10.8 Sel-351 Control Subcommands

    Set Remote Bit n (ON position) CRB n Clear Remote Bit n (OFF position) PRB n Pulse Remote Bit n for 1/4 cycle (MOMENTARY position) Remote Control Switches on page 7.10 for more information. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 475 To disable looped back mode before the selected number of minutes, re-issue the LOOP command with the R parameter. If both M channels IRRORED are enabled, omitting the channel specifier in the disable command will cause both channels to be disabled. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 476 Passwords formed in this manner are less susceptible to password guessing and automated attacks. Examples of valid, distinct strong passwords include: ➤ Ot3579A24.68 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 477: Table 10.9 Valid Password Characters

    Power Elements Mirrored Bits Load Profile Directional Sensitive Neutral Channel Enhanced Integration Bits & Fast SER SELboot checksum XXXX OK FID=SEL-351-7-RXXX-V0-Z005005-DXXXXXXXX SELboot-311-R102 If above information is unexpected, contact SEL for assistance =>> Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
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  • Page 479: Command Summary

    SEL-351-5, -6, -7 Relay Command Summary R.Instruction Manual Access Level 0 Access Level 0 is the initial relay access level. The relay automatically returns to Access Level 0 Command when a serial port time-out setting expires or after a QUIT command. The screen prompt is: = Enter Access Level 1.
  • Page 480 SEL-351-5, -6, -7 Relay Command Summary Access Level 1 The Access Level 1 commands allow the user to look at settings information and not change it, Commands and to retrieve and reset event, recorder, and metering data. The screen prompt is: =>...
  • Page 481 SEL-351-5, -6, -7 Relay Command Summary Access Level 1 The Access Level 1 commands allow the user to look at settings information and not change it, Commands and to retrieve and reset event, recorder, and metering data. The screen prompt is: =>...
  • Page 482 SEL-351-5, -6, -7 Relay Command Summary The Access Level 2 commands allow unlimited access to relay settings, parameters, and output Access Level 2 contacts. All Access Level 1 and Access Level B commands are available from Access Level 2. The Commands screen prompt is: =>>...

  • Page 483: Section 11: Front-Panel Interface

    Section 11 R.Instruction Manual Front-Panel Interface Overview This section describes how to get information, make settings, and execute control operations from the relay front panel. It also describes the default displays. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 484: Front-Panel Pushbutton Operation

    MET Command (Metering Data) on page 10.19. Some of the front-panel primary functions do not have serial port command equivalents. These are discussed in Functions Unique to the Front-Panel Interface on page 11.6. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 485: Figure 11.2 Front-Panel Pushbuttons-Primary Functions

    Use the {Up Arrow} and {Down Arrow} pushbuttons to then change the digit. Press the {SELECT} pushbutton once the correct Access Level B or Access Level 2 password is ready to enter. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 486: Figure 11.3 Front-Panel Pushbuttons-Primary Functions (Continued)

    (see Figure 11.4). Use the {Left Arrow} and {Right Arrow} to underscore a desired function. Then press the {SELECT} pushbutton to select the function. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 487: Figure 11.4 Front-Panel Pushbuttons-Secondary Functions

    The front-panel display gives indication of the arrow button to use (Displays symbols: ← → ↑ ↓) EXIT Function Exit Entirely and Description Return to Default Display Figure 11.4 Front-Panel Pushbuttons—Secondary Functions Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 488: Functions Unique To The Front-Panel Interface

    “last shot” value, which is a function of the number of set open intervals. There are two set open intervals in the factory default settings, thus two reclosures (shots) are possible in a reclose sequence. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 489 RECLOSE COUNT =2 If the relay trips the breaker open again, the reclosing relay goes to the lockout state (front-panel LO LED illuminates). The reclosing relay shot counter screen still appears as: Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 490: Figure 11.5 Local Control Switch Configured As An On/Off Switch

    SHO T command via the serial port [see Section 9: Setting the Relay SHO Command (Show/View Settings) on page 10.26]. See Local Control Switches on page 7.6 for more information on local control. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 491 Relay MANUAL TRIP Word MANUAL TRIP 1 ←→ RETURN Logical 1 (Logical 0) Position: RETURN TRIP Press the {SELECT} pushbutton, and the operate option for the displayed local control switch displays: Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 492 For example, suppose the local control switch with local bit output LB1 is configured as an ON/OFF type switch (see Figure 11.5). Additionally, suppose it is used to enable/disable reclosing. If local bit LB1 is at logical 1, reclosing is enabled: SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 493 OGIC as follows: 79DTL = !LB1 + LB3 [=NOT(LB1) + LB3] Drive-to-Lockout and Drive-to-Last Shot Settings (79DTL and 79DLS, Respectively) on page 6.21 for more information on setting 79DTL. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 494: Rotating Default Display

    ) are enabled for 79 DISABLED BREAKER OPEN display, they also enter into the display rotation. Global setting SCROLD determines how long each message is displayed, settable from 1 to 60 seconds. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 495 IN102 (optoisolated input IN102) DP2 = 52A (breaker status, see Figure 7.3) Optoisolated input IN102 is used as a recloser enable/disable. 52A is the circuit breaker status (see Optoisolated Inputs on page 7.2). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 496 DP1_0 = 79 DISABLED SERIAL SERIAL FAULT TYPE FAULT TYPE PORT F PORT F 79 ENABLED DP2_1 = BREAKER CLOSED BREAKER OPEN DP2 = 52A = logical 0 DP2_0 = BREAKER OPEN SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 497 Scroll Lock Control of The rotating default display can be locked on a single screen. (See Rotating 7.36). Access the scroll lock control with the {OTHER} Default Display on page Front-Panel LCD pushbutton. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 498 Front-Panel Neutral/ Global setting FPNGD (Front-Panel Neutral/Ground Display) selects whether IG, IN, or neither is displayed on the front-panel rotating display. Setting Ground Current choices are: Display FPNGD = FPNGD = SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 499 Additional Rotating Figure 5.17 and accompanying text in Section 5: Trip and Target Logic for an example of resetting a rotating default display with the {TARGET RESET} Default Display pushbutton. Example Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
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  • Page 501: Overview

    64-cycles, or once per day. The most recent 3,855 SSI entries are always available from nonvolatile memory, and up to 3,855 older entries may also be available. See Figure 12.8 for an example SSI report. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 502: Standard 15/30-Cycle Event Reports

    ER. Relay Word bit TRIP (in Figure 5.1) is usually assigned to an output contact for tripping a circuit breaker (e.g., SEL control equation setting OGIC OUT101 = TRIP). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 503 {CNTRL} pushbutton. Section 10: Serial Port Communications and Commands Section 11: Front-Panel Interface (Figure 11.3) for more information on the TRI (Trigger Event Report) and PUL (Pulse Output Contact) commands. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 504: Figure 12.1 Example Event Summary

    The possible event types and their Event: descriptions are shown in the table below. Note the correspondence to the preceding event report triggering conditions (see Standard Event Report Triggering on page 12.2). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 505: Table 12.1 Event Types

    The listed currents are: ➤ Phase (A = channel IA, B = channel IB, C = channel IC) ➤ Neutral ground (N = channel IN) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 506 Display the most recent event report at 1/4 cycle resolution. EVE 2 Display the second event report at 1/4 cycle resolution. EVE S16 L10 Display 10 cycles of the most recent report at 1/16 cycle resolution. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 507 (so they increment forwards in time). If TSOK = logical 0, this event report display option is not available. Figure 12.2 shows how an event report is modified with the P parameter. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 508: Figure 12.2 Example Synchrophasor-Level Precise Event Report 1/16-Cycle Resolution

    EVE R). Use the unfiltered event reports to observe: ➤ Power system harmonics on channels IA, IB, IC, IN, VA, VB, VC, VS ➤ Decaying dc offset during fault conditions on IA, IB, IC SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 509: Table 12.2 Standard Event Report Current, Voltage, And Frequency Columns

    Voltage measured by channel VB (primary kV, PTCONN = WYE) Voltage measured by channel VC (primary kV, PTCONN = WYE) Power system phase-to-phase voltage V (primary kV, PTCONN = DELTA) Power system phase-to-phase voltage V (primary kV, PTCONN = DELTA) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 510 -7.3 -7.7 13.7 125 60.01 .45..-160 -0.2 13.3 -12.9 -8.2 125 60.01 .45..-181 -14.8 -13.6 125 60.01 .45..-160 -13.4 12.9 8.2 125 60.01 .45..SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 511: Table 12.3 Output, Input, And Protection, And Control Element Event Report Columns

    In 56 IN105, IN106 Optoisolated input IN105 asserted. Optoisolated input IN106 asserted. Both IN105 and IN106 asserted. 51 A 51A, 51AT, 51AR Time-overcurrent element reset (51_R). 51 B 51B, 51BT, 51BR Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 512 Forward phase directional element F32P picked up. R32P Reverse phase directional element R32P picked up. F32Q Forward negative-sequence directional element F32Q picked up. R32Q Reverse negative-sequence directional element R32Q picked up. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 513 CA phase-to-phase instantaneous undervoltage element 27CA picked up. 27AB and 27CA elements picked up. 27AB and 27BC elements picked up. 27BC and 27CA elements picked up. 27AB, 27BC and 27CA elements picked up. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 514 Positive-sequence instantaneous overvoltage element 59V1 picked up. (delta-connected) 59 Q 59Q, 59Q2 Negative-sequence instantaneous overvoltage element 59Q picked up. (delta-connected) Negative-sequence instantaneous overvoltage element 59Q2 picked up. Both 59Q and 59Q2 picked up. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 515 Recloser reset interval timer is timing. Shot SH0, SH1, SH2 Reclosing relay nonexistent. SH3, SH4 shot = 0 (SH0). shot = 1 (SH1). shot = 2 (SH2). shot = 3 (SH3). shot = 4 (SH4). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 516 LT1, LT2 Latch bit LT1 asserted. Latch bit LT2 asserted. Both LT1 and LT2 asserted. Ltch 34 LT3, LT4 Latch bit LT3 asserted. Latch bit LT4 asserted. Both LT3 and LT4 asserted. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 517 Z3XT Logic output from zone (level) 3 extension timer Z3XT asserted. DSTR DSTRT Directional carrier start DSTRT asserted. NSTR NSTRT Nondirectional carrier start NSTRT asserted. STOP STOP Carrier stop STOP asserted. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 518 Both TMB7B and TMB8B asserted. RMB B 12 RMB1B, RMB2B channel B receive bit 1 RMB1B asserted. IRRORED channel B receive bit 2 RMB2B asserted. IRRORED Both RMB1B and RMB2B asserted. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 519 Both PWR1C and PWR2C picked up. PWR C 34 PWRC3, PWRC4 Level 3 C-phase power element PWR3C picked up. Level 4 C-phase power element PWR4C picked up. Both PWR3C and PWR4C picked up. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 520 Both 3PWR3 and 3PWR4 picked up. Output contacts can be a- or b-type contacts (see Table 2.2 Figure 7.27–Figure 7.28). Available in Firmware Version 7, when Global setting PTCONN = WYE. Available in Firmware Version 7. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 521: Sequential Events Recorder (Ser) Report

    51P,51G,51PT,,51GT , 50P1, , 50P2 SER1 = The relay displays the setting as: SER1 = 51P,51G,51PT,51GT,50P1,50P2 The relay can monitor up to 72 elements in the SER (24 in each of SER1, SER2, and SER3). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 522 (bottom) of the report, for the given date. Chronological progression through the report is down the page and in descending row number. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 523 Clear the SER report from nonvolatile memory with the SER C command as shown in the following example: =>SER C <Enter> Clear the SER Are you sure (Y/N) ? Y <Enter> Clearing Complete Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 524: Example Standard 15-Cycle Event Report

    1609 -3.8 10.5 -5.1 24 60.01 1... b.. -1965 0 -1846 -7.2 -2.9 10.1 24 60.01 1... b.. -849 -146 -956 -10.7 -0.0 24 60.01 1... b.. (Continued on next page) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 525 ........ Co0 ..............Co0 ..............Co0 ........ (Continued on next page) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 526 =CC + LB4 ULCL =TRIP 79RI =TRIP 79RIS =52A + 79CY 79DTL =OC + !IN102 + LB3 79DLS =79LO 79SKP =0 79STL =TRIP 79BRS =0 79SEQ =0 79CLS =1 (Continued on next page) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 527 51NTC =1 51GTC =1 51QTC =1 =TRIP SV10 SV11 SV12 SV13 SV14 SV15 SV16 OUT101=TRIP OUT102=CLOSE OUT103=SV1T OUT104=0 OUT105=0 OUT106=0 OUT107=0 OUT201=0 OUT202=0 OUT203=0 OUT204=0 OUT205=0 OUT206=0 (Continued on next page) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 528: Figure 12.3 Example Standard 15-Cycle Event Report 1/4 Cycle Resolution (Wye-Connected Pts)

    Figure 12.6 shows how the event report current column data can be converted to phasor rms values. Voltages are processed similarly. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 529: Figure 12.4 Example Partial Event Report With Delta-Connected Pts

    Filtered and Unfiltered Event Reports on page 12.8. The event report sample in Figure 12.4 is not related to the event report sample in Figure 12.3, or to the SER sample in Figure 12.7. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 530: Figure 12.5 Derivation Of Event Report Current Values And Rms Current Values From Sampled Current Waveform

    Values From Sampled Current Waveform Figure 12.5, note that any two rows of current data from the event report in Figure 12.3, 1/4 cycle apart, can be used to calculate rms current values. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 531: Figure 12.6 Derivation Of Phasor Rms Current Values From Event Report Current Values

    IA = 2749 A ∠–32.6° The present sample (IA = 2317 A) is a real rms current value that relates to the phasor rms current value: 2749 A * cos(–32.6°) = 2317 A Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 532: Example Sequential Events Recorder (Ser) Report

    The relay leaves the Lockout State (79LO) and goes to the Reset State, 300 cycles after the circuit breaker closes. Related setting: 79RSLD = 300.000 cycles Time difference: 09:28:03.385–09:27:58.364 = 5.021 seconds (= 300 cycles) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 533 Open interval 79OI1 does not start timing until trip output contact OUT101 deasserts. Related settings: 79STL = TRIP Close output contact OUT102 asserts for first automatic reclose. Related settings:79OI1 = 300.00 Time difference: 09:28:36.874–09:28:31.879 = 4.995 seconds (≅300 cycles) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 534: Sag/Swell/Interruption (Ssi) Report (Available In Firmware Version 7)

    ) as a percentage of Vbase (delta- connected) ➤ Vs channel voltage magnitude as a percentage of Vbase; displayed value, Vs (secondary) • PTRS --------------------------------------------------------- - • 100% 1000 • Vbase SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 535: Table 12.4 Ssi Element Status Columns

    SSI archive, which indicates that the recorder is ready. The Vbase value is allowed to change on a gradual basis to follow normal system voltage variations, but is “locked” when a disturbance occurs. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 536 ➤ Otherwise, if any SSI elements are asserted, switch to the medium recording mode. ➤ Otherwise, stop recording. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 537 The recorded SSI data can be viewed from any setting group, even if setting ESSI = N. Row 1 is the most recently triggered row. View the SSI report by Report date or SSI row number as outlined in the examples below. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 538 (Month/Day/Year). If setting DATE_F = YMD, then the dates are entered Year/Month/Day. If the requested SSI event report rows do not exist, the relay responds: No Voltage Sag/Swell/Interruption Data SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 539 SAG or SWELL condition when normal system voltages are applied. Reset the SSI Recorder logic and clear the Vbase value by issuing the SSI R command as shown in the following example: Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 540 83 104 15.29 .UO F 12/05/00 16:21:12.706 94 101 15.29 .UO F 12/05/00 16:21:12.710 15.29 .UO F 12/05/00 16:21:12.714 15.29 .U. F 12/05/00 16:21:12.718 15.29 .U. F (Continued on next page) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 541: Figure 12.8 Example Sag/Swell/Interruption (Ssi) Report (Ptconn = Wye)

    In this situation, the SSI Report is strictly a power quality tool, reporting disturbances actually experienced by the phase-to-phase connected load on the power system. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 542 For details on the ungrounded/high-impedance grounded and Petersen Coil directional elements, see Directional Control for Neutral Ground and Residual Ground Overcurrent Elements on page 4.9. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 543: Section 13: Testing And Troubleshooting

    This section provides guidelines for determining and establishing test routines for the SEL-351 Relay. Included are discussions on testing philosophies, methods, and tools. Relay self-tests and troubleshooting procedures are shown at the end of the section. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 544: Testing Philosophy

    Brief fault tests ensure that the relay settings are correct. It is not necessary to test every relay element, timer, and function in these tests. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 545 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. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 546: Testing Methods And Tools

    (J1 and J10) connector information. Table 13.2 shows the output (J1) value of the input module (for a given input value into the relay rear panel). The processing module input (J10) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 547: Table 13.2 Resultant Scale Factors For Input Module

    0.1 V Using the Low-Level Test Interface When Global Setting PTCONN = DELTA When simulating a delta PT connection with the low-level test interface referenced in Figure 13.1, apply the following signals: Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 548 Use the SET L command (SEL control equations) to set an output OGIC contact (e.g., OUT101–OUT107 for Model 0351x1) to the element under test. The available elements are the Relay Word bits referenced in Table 9.5. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 549 SER report. Use this method to verify timing associated with time-overcurrent elements, reclosing relay operation, etc. Do not forget to reenter the correct relay settings when you are ready to place the relay in service. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 550: Relay Self-Tests

    10 seconds. Failure ±11.20 V Latched ±14.00 V +15 V PS Warning ±14.40 V Pulsed Measures the 15 V power supply ±15.60 V every 10 seconds. Failure ±14.00 V Latched ±16.00 V SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 551 The microprocessor examines each program instruction, memory access, and interrupt. The relay displays VECTOR nn on the LCD upon detection of an invalid instruction, memory access, or spurious interrupt. The test runs con- tinuously. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 552: Relay Troubleshooting

    Ensure that Global settings PTCONN, VSCONN, NFREQ, or PHROT are Expected set correctly. ➤ Ensure that Group settings CTR, CTRN, PTR, or PTRN are set correctly. ➤ Ensure that relay analog inputs are connected correctly. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 553: Relay Calibration

    Testing and Troubleshooting 13.11 Relay Calibration Relay Calibration The SEL-351 is factory-calibrated. If you suspect that the relay is out of calibration, contact the factory. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 554: Factory Assistance

    We appreciate your interest in SEL products and services. If you have questions or comments, please contact us at: Schweitzer Engineering Laboratories, Inc. 2350 NE Hopkins Court Pullman, WA USA 99163-5603 Telephone: (509) 332-1890 Fax: (509) 332-7990 Internet: www.selinc.com SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 555: Table A.1 Firmware Revision History

    Lowered Port 1 maximum speed from 38.4 kbps to 19.2 kbps. ➤ Added minimum threshold for current and voltage metering (1% of I and 0.10 V secondary) below which magnitudes are set to zero. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 556: Appendix A: Firmware And Manual Versions Firmware

    Corrected rounding error in breaker wear monitor. This firmware applies to the manual date code listed: ➤ SEL-351-x-R312-V0-Z005005-D20030714 Optimized calibration settings for Petersen Coil units to 20030714 improve the factory calibration process. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 557 ➤ Updated BRE W command to allow for trip counters, accumu- lated interrupted current values, and percent breaker wear to be pre-loaded for each individual phase. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 558 Added variable scaling of analog quantities in event reports (i.e., variable number of digits behind the decimal point, depending on magnitude). Added additional event report fault types for Petersen Coil- and ungrounded/high-impedance grounded sys- tems. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 559 Target LEDs can no longer be reset if a TRIP condition is 20000106 present. This firmware applies to the manual date code listed: ➤ SEL 351-x-R303-V0-Z001001-D19990914 Manual update only. See Table A.2 for a description of updates. 991123 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 560 This firmware applies to the manual date code listed: ➤ SEL 351-x-R300-V0-D990621 Manual update only. See Table A.2 for a description of updates. 990721 ➤ SEL 351-x-R300-V0-D990621 Original Firmware Release 990616 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 561: Instruction Manual

    Updated serial communications baud rate for Port 1. Appendix L ➤ Added a new SEL Synchrophasors appendix. This manual differs from the previous versions as follows: Section 1 20060727 ➤ Updated subsection: Power Element Accuracy on page 1.17. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 562 Settings Sheets ➤ Modification to ranges of E79, Z1ANG, Z0ANG, 51P1P, 51P2P, 51QP, 3PWR1P, 3PWR2P, 3PWR3P, and 3PWR4P settings. Section 10 ➤ Updated subsection: PAS Command (Change Passwords) on page 10.40. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 563 Section 2 ➤ Updated subsection: Relay Mounting on page 2.2. ➤ Removed subsection related to changes in part numbers for Connectorized relays. The information was not applicable to SEL-351-5, -6, -7 relays. ➤ Renamed Figure 2.10 through Figure 2.23. Section 3 ➤...
  • Page 564 Corrected object type superscripts for extended mode DNP map index entries 80–85 and 105–122, and cor- rected the description for entries 120–122 (Table H.3). Appendix I ➤ Updated subsection: Synchronization on page I.3. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 565 Added subsection: Single-Phase Power Elements (EPWR = 1, 2, 3, or 4) on page 3.58. ➤ Added subsection: Three-Phase Power Elements (EPWR = 3P1, 3P2, 3P3, or 3P4) on page 3.58. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 566 Updated BRE W command to allow trip counters and accumulated interrupted current values to be pre-loaded for each individual phase. ➤ Updated VER example printout in VER Command (Show Relay Configuration and Firmware Version) on page 10.41. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 567 (when V not available), 220 Vdc optoisolated inputs, extended lower end of pickup setting range for residual ground overcurrent ele- ments, and changed meter specification for currents I , and I Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 568 Added 0.2 A nominal neutral channel (IN) current input information for low-level test interface. ➤ Revised low-level test interface information to more clearly explain scale factors, especially with the addition of Table 13.1. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 569 Added MET X command description. ➤ Updated password information. ➤ Added warning note to PAS Command (Change Passwords) on page 10.40. ➤ Updated Command Summary to include MET X, SSI R, and SSI T commands. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 570 SET.33. Section 10 ➤ Added notes about powering down the relay after setting the date or time. ➤ Added DTA2 compatibility information. ➤ Revised SEL-351-5, -6, -7 Relay Command Summary Section 12 ➤ Added Table 12.1. SEL-351-5, -6, -7 Relay...
  • Page 571 Appendix H ➤ Corrected documentation errors in DNP 3.00 Device Profile. This manual differs from the previous versions as follows: ➤ 990827 Updated M format throughout to reflect new trademark. IRRORED Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 572 Appendix J ➤ Extensively rewritten. This manual differs from the previous versions as follows: ➤ 990721 Updated Appendix A: Firmware and Manual Versions. ➤ 990616 New manual release. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 573: Appendix B: Firmware Upgrade Instructions

    E. Download Existing Firmware SEL communications processor. F. Upload New Firmware G. Check Relay Self-Tests H. Verify Settings, Calibration, Status, Breaker Wear, and Metering I. Return the Relay to Service Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 574 Step 9. Press the {Down Arrow} pushbutton to scroll through the port settings; write down the value for each setting. Step 10. At the prompt, select and press the EXIT SETTINGS? {SELECT} pushbutton. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 575: Figure B.1 Establishing A Connection

    Step 5. Select the computer serial port you are using to communicate with the relay (Figure B.2) and click OK. This port matches the port connection that you made in Step 1 under B. Establish a Terminal Connection. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 576: Figure B.2 Determining The Computer Serial Port

    From the File menu, choose Properties. b. Select the Settings tab in the Firmware Upgrade Properties dialog box (Figure B.4). c. Select VT100 from the Emulation list box and click SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 577: Figure B.4 Setting Terminal Emulation

    Step 10. Correct the port setting: a. From the File menu, choose Properties. You should see a dialog box similar to Figure B.6. b. Select a different port in the Connect using list box. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 578: Figure B.6 Correcting The Port Setting

    (EVE), Metering (MET), Breaker Wear Monitor (BRE), Communications Log Summary (COM X or COM Y), or Sequential Events Recorder (SER) data that you want to retain (see the relay instruction manual for these procedures). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 579 D. Start SEL BOOT Step 1. Find and record the firmware identification string (FID): a. From the File menu, choose Properties. b. Select the Settings tab in the Properties dialog box (Figure B.4). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 580: Figure B.8 Preparing Hyperterminal For Id Command Display

    BOOT prompt. BOOT !> Step 4. Press <Enter> to confirm that the relay is in SEL BOOT You will see another SEL prompt. BOOT !> SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 581: Figure B.9 List Of Commands Available In Sel Boot

    (Figure B.10). d. Click OK twice. Step 8. Press <Enter> to check for the SEL prompt indicating BOOT !> that serial communication is successful. Figure B.10 Matching Computer to Relay Parameters Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 582: Figure B.11 Example Receive File Dialog Box

    B.13. After the transfer, the relay responds with the any filename you entered in Step 6 following: during the earlier download attempt; this saves you from reentering these on a subsequent attempt. Download completed successfully! SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 583: Figure B.13 Downloading Old Firmware

    From the Transfer menu in HyperTerminal, choose Send File (Figure B.14). b. In the Filename text box, type the location and filename of the new firmware or use the Browse button to select the firmware file. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 584: Figure B.14 Selecting New Firmware To Send To The Relay

    Step 6. Press <Enter> and confirm that the Access Level 0 prompt appears on the computer screen. Step 7. If you see the Access Level 0 prompt, proceed to G. Check Relay Self-Tests on page B.13. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 585: Table B.1 Troubleshooting New Firmware Upload

    Step 1. Type ACC <Enter>. Step 2. Type the Access Level 1 password and press <Enter>. You will see the Access Level 1 prompt. => Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 586 Use a similar format for other password levels. SEL relay passwords are case sensitive, so the relay treats lowercase and uppercase letters as different letters. Step 4. Go to H. Verify Settings, Calibration, Status, Breaker Wear, and Metering. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 587 H. Verify Settings, Calibration, Status, Breaker Wear, and Metering Step 1. Use the ACC and 2AC commands with the associated passwords to enter Access Level 2. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 588: Figure B.16 Preparing Hyperterminal For Id Command Display

    For a mismatch between a displayed FID or part number, and the firmware envelope label, reattempt the upgrade or contact the factory for assistance. Step 5. Type STA <Enter> and verify that all relay self-test parameters are within tolerance. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 589: Ethernet Port Firmware Upgrade Instructions

    To restart protocol operation, a valid CID must be transferred to the relay. Performing a firmware upgrade will not overwrite or corrupt the CID file already stored in your relay. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 590 Step 3. In the Address bar, enter the user name (default for FTPUSER setting is 2AC, 2AC password, and the FTP IP address of the relay (Figure B.17) at the same time (ftp:// user:password@host:port/path), and press <Enter>. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 591: Figure B.17 Establishing An Ftp Connection

    Figure B.18 Alternate Method of Establishing an FTP Connection Step 6. Right-click on the file that you would like to copy. Step 7. Click Copy to Folder (Figure B.19). Step 8. Browse for folder. Step 9. Click OK. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 592: Figure B.19 Read (Open) File

    Step 3. Click and drag the file to the Internet Explorer window. The Copying dialog box appears until the upload is complete. If the Confirm File Replace dialog box appears, click on Yes and the file will transfer. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 593 Step 3. Verify that the STA report includes at the end Device Enabled of the report. Step 4. Verify that the STA report FID matches the FID of the firmware you transferred. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 594 This page intentionally left blank...

  • Page 595: Appendix C: Sel Distributed Port Switch Protocol

    SEL Distributed Port Switch Protocol (LMD) permits multiple SEL relays to share a common communications channel. It is appropriate for low-cost, low- speed port switching applications where updating a real-time database is not a requirement. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 596: Settings

    Two-character ASCII address. The range is “01” to “99.” The default is “01.” SETTLE: Time in seconds that transmission is delayed after the request to send (RTS line) asserts. This delay accommodates transmitters with a slow rise time. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 597: Operation

    6. Enter the sequence CTRL+X QUIT <CR> before entering the prefix character if all relays in the multidrop network do not have the same prefix setting. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 598 This page intentionally left blank...

  • Page 599: Appendix D: Configuration, Fast Meter, And Fast Operate Commands

    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-351 Relay. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 600: Message Lists

    Request to Relay Response From Relay (ASCII) ASCII Firmware ID String and Terminal ID Setting (TID) ASCII Names of Relay Word bits ASCII Names of bits in the A5B9 Status Byte SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 601: Message Definitions

    Scale factors in Fast Meter message No scale factors # of analog input channels # of samples per channel # of digital banks One calculation block 0004 Analog channel offset 0054 Time stamp offset Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 602 Analog channel type Scale factor type 0000 Scale factor offset in Fast Meter message 564241540000 Analog channel name (VBAT) Analog channel type Scale factor type 0000 Scale factor offset in Fast Meter message SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 603: Table D.5 A5D1 Fast Meter Data Block

    Command; Demand (A5C2) or Peak Demand (A5C3) Length # of status flag bytes Scale factors in meter message # of scale factors # of analog input channels # of samples per channel Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 604 Scale factor offset in Fast Meter message 50422B000000 Analog channel name (PB+) Analog channel type Scale factor type 0000 Scale factor offset in Fast Meter message 50432B000000 Analog channel name (PC+) Analog channel type Scale factor type SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 605 Scale factor offset in Fast Meter message 50332D000000 Analog channel name (P3–) Analog channel type Scale factor type 0000 Scale factor offset in Fast Meter message 51412D000000 Analog channel name (QA–) Analog channel type Scale factor type Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 606: Table D.7 A5D2/A5D3 Demand/Peak Demand Fast Meter Message

    (bit 4). The bit is set on power up and on settings changes. If the STSET bit is Message set, the external device should request the A5C1, A5C2, and A5C3 messages. The external device can then determine if the scale factors or line configuration parameters have been modified. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 607: Table D.8 A5Ce Fast Operate Configuration Block

    Operate code, pulse remote bit RB9 Operate code, clear remote bit RB10 Operate code, set remote bit RB10 Operate code, pulse remote bit RB10 Operate code, clear remote bit RB11 Operate code, set remote bit RB11 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 608: Table D.9 A5Eo Fast Operate Remote Bit Control

    4. The FASTOP port setting is set to Y. 5. The relay is enabled. Remote bit set and clear operations are latched by the relay. Remote bit pulse operations assert the remote bit for one processing interval (1/4 cycle). SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 609: Table D.10 A5E3 Fast Operate Breaker Control

    Block Table D.11 A5CD Fast Operate Reset Definition Block (Sheet 1 of 2) Data Description A5CD Command Message length The number of Fast Operate reset codes supported Reserved for future use Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 610: Table D.12 A5Ed Fast Operate Reset Command

    4-byte ASCII hex representation of the checksum of the relay firmware yyyy is the 4-byte ASCII hex representation of the checksum for each line The ID message is available from Access Level 0 and higher. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 611 "ALARM","OUT107","OUT106","OUT105","OUT104","OUT103","OUT102","OUT101","yyyy" <CR><LF> "3PO","SOTFE","Z3RB","KEY","EKEY","ECTT","WFC","PT","yyyy"<CR><LF> "PTRX2","PTRX","PTRX1","UBB1","UBB2","UBB","Z3XT","DSTRT","yyyy"<CR><LF> "NSTRT","STOP","BTX","TRIP","OC","CC","DCHI","DCLO","yyyy"<CR><LF> "67P2S","67N2S","67G2S","67Q2S","PDEM","NDEM","GDEM","QDEM","yyyy"<CR><LF> "OUT201","OUT202","OUT203","OUT204","OUT205","OUT206","OUT207","OUT208","yyyy" <CR><LF> "OUT209","OUT210","OUT211","OUT212","*","*","*","*","yyyy"<CR><LF> "IN208","IN207","IN206","IN205","IN204","IN203","IN202","IN201","yyyy"<CR><LF> "*","*","*","*","*","*","*","*","yyyy"<CR><LF> "RMB8A","RMB7A","RMB6A","RMB5A","RMB4A","RMB3A","RMB2A","RMB1A","yyyy" <CR><LF> "TMB8A","TMB7A","TMB6A","TMB5A","TMB4A","TMB3A","TMB2A","TMB1A","yyyy" <CR><LF> "RMB8B","RMB7B","RMB6B","RMB5B","RMB4B","RMB3B","RMB2B","RMB1B","yyyy" <CR><LF> "TMB8B","TMB7B","TMB6B","TMB5B","TMB4B","TMB3B","TMB2B","TMB1B","yyyy" <CR><LF> "LBOKB","CBADB","RBADB","ROKB","LBOKA","CBADA","RBADA","ROKA","yyyy" <CR><LF> "PWRA1","PWRB1","PWRC1","PWRA2","PWRB2","PWRC2","INTC","INT3P","yyyy"<CR><LF> "PWRA3","PWRB3","PWRC3","PWRA4","PWRB4","PWRC4","INTA","INTB","yyyy"<CR><LF> "SAGA","SAGB","SAGC","SAG3P","SWA","SWB","SWC","SW3P","yyyy"<CR><LF> "SAGAB","SAGBC","SAGCA","SWAB","SWBC","SWCA","*","*","yyyy"<CR><LF> "3PWR1","3PWR2","3PWR3","3PWR4","INTAB","INTBC","INTCA","DELTA","yyyy"<CR><LF> "27AB2","27BC2","27CA2","59AB2","59BC2","59CA2","59Q2","3V0","yyyy"<CR><LF> "V1GOOD","*","*","V0GAIN","INMET","ICMET","IBMET","IAMET","yyyy"<CR><LF> "GNDSW","50NF","50NR","32NE","F32N","R32N","32NF","32NR","yyyy"<CR><LF> "*","F32W","R32W","F32C","R32C","NSA","NSB","NSC","yyyy"<CR><LF> <ETX> Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 612 SNS message for the SEL-351 is: <STX>"xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","yyyy"<CR><LF> "xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","yyyy"<CR><LF> "xxxx","xxxx","xxxx", <CR><LF><ETX> where: xxxx is a string from the settings in SER (SER1, SER2 and SER3) yyyy is the 4-byte ASCII representation of the checksum SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 613: Appendix E: Compressed Ascii Commands

    The SEL-351 provides the following Compressed ASCII commands: Command Description CASCII Configuration message CSTATUS Status message CHISTORY History message CEVENT Event message Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 614: Cascii Command-General Format

    String of maximum m characters (e.g., 10S for a 10-character string) yyyy is the 4-byte hex ASCII representation of the checksum A Compressed ASCII command may require multiple header and data configuration lines. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 615 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","yyyy"<CR><LF><ETX> Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 616: Cascii Command-Sel-351

    4-byte hex ASCII representation of the checksum. See the yyyy CEVENT command for definition of the “Names of elements in the relay word Rows 2 - 62 separated by spaces” field. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 617: Cstatus Command-Sel-351

    ","yyyy"<CR><LF> "MONTH","DAY","YEAR","HOUR","MIN","SEC","MSEC","yyyy"<CR><LF> xxxx,xxxx,xxxx,xxxx,xxxx,xxxx,xxxx,"yyyy"<CR><LF> "IA","IB","IC","IN","VA","VB","VC","VS","MOF","+5V_PS","+5V_REG", "-5V_REG","+12V_PS","-12V_PS","+15V_PS","-15V_PS", "TEMP","RAM","ROM","A/D","CR_RAM","EEPROM","IO_BRD","yyyy"<CR><LF> ,"xxxx","xxxx","xxxx","xxxx","xxxx","xxxx", "xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx", "xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","yyyy"<CR><LF><ETX> where: xxxx are the data values corresponding to the first line labels yyyy is the 4-byte hex ASCII representation of the checksum Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 618: Chistory Command-Sel-351

    4-byte hex ASCII representation of the checksum If the history buffer is empty, the relay responds: <STX>"No Data Available","yyyy"<CR><LF><ETX> SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 619: Cevent Command-Sel-351

    SHOT is the recloser shot counter TARGETS are the front-panel tripping targets IA, IB, IC, is the fault current IN, IG, 3I2 TRIG refers to the trigger record Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 620 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 PWRA1 PWRB1 PWRC1 PWRA2 PWRB2 PWRC2 INTC INT3P PWRA3 SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 621: Table E.1 Mapping Labels To Bits

    Table E.1 Mapping Labels to Bits Labels 50A1 50B1 50C1 50A2 50B2 50C2 50A3 50B3 Bits In this example, the 50A2 element is asserted (logical 1); all others are deasserted (logical 0). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
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  • Page 623: Appendix F: Setting Negative-Sequence Overcurrent Elements

    F.3 for guidelines on coordinating negative-sequence definite-time overcurrent elements and a following coordination example. The coordination example uses time-overcurrent elements, but the same principles can be applied to definite-time overcurrent elements. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 624: Setting Negative-Sequence Time-Overcurrent Elements

    Figure F.1 Minimum Response Time Added to a Negative-Sequence Time- Overcurrent Element 51QT Continue reading in Coordinating Negative-Sequence Overcurrent Elements on page F.3 for guidelines on coordinating negative-sequence time- overcurrent elements and a following coordination example. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 625: Coordinating Negative-Sequence Overcurrent Elements

    Coordination Example Figure F.2, the phase and negative-sequence overcurrent elements of the feeder relay (51F and 51QF, respectively) must coordinate with the phase overcurrent element of the line recloser (51R). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 626: Figure F.2 Distribution Feeder Protective Devices

    The 450 A maximum feeder load current limits the sensitivity of the feeder phase overcurrent element, 51F, to a pickup of 600 A. The feeder relay cannot back up the line recloser for phase faults below 600 A. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 627: Figure F.4 Phase-To-Phase Fault Coordination

    F.5) by applying the equation given in Guideline 4. The time dial (lever) and curve type of the element remain the same (if the element is a definite-time element, the time delay remains the same). Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 628: Figure F.5 Negative-Sequence Overcurrent Element Derived From "Equivalent" Phase Overcurrent

    If the downstream protective device includes ground overcurrent elements, in addition to phase overcurrent elements, there should be no need to check the Concerns coordination between the ground overcurrent elements and the upstream negative-sequence overcurrent elements. The downstream phase overcurrent SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 629 Coordinating Negative-Sequence Overcurrent Elements element, whether it operates faster or slower than its complementary ground overcurrent element, will operate faster than the upstream negative-sequence overcurrent element for all faults, including those that involve ground. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 630: Other Negative-Sequence Overcurrent Element References

    This conference paper gives many good application examples for negative-sequence overcurrent elements. The focus is on the transmission system, where negative-sequence overcurrent elements provide better sensitivity than zero-sequence overcurrent elements in detecting some single-line-to-ground faults. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 631: Appendix G: Setting Sel Ogic Control Equations

    Command SET L) on page SET.18). See the SHO Command (Show/View Settings) on page 10.26 for a list of the factory settings the SEL-351 Relay ships with in a standard relay shipment. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 632: Relay Word Bits

    Word bit 51PT is in the following state: 51PT = 0 (logical 0) If phase time-overcurrent element 51PT is timed out on its curve, Relay Word bit 51PT is in the following state: 51PT = 1 (logical 1) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 633 Relay Word bit (e.g., 51PR) that asserts for the reset state of the element. Relay Word bits are used in SEL control equations, which are explained OGIC in the following subsection. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 634 OGIC SELOGIC Control Equation NOT Operator ! The NOT operator ! is applied to a single Relay Word bit and also to multiple elements (within parentheses). Following are examples of both. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 635 If either one of 51P or 51G is still asserted [e.g., 51G = 1 (logical 1)], the unlatch condition is not true: ULTR = NOT(51P + 51G) = NOT(0 + 1) = NOT(1) = 0 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 636 ER to see each transition individually. Suppose a ground fault occurs and a breaker failure condition finally results. Figure G.1 demonstrates the action of the rising-edge operator / on the individual elements in setting ER. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 637: Figure G.1 Result Of Rising-Edge Operators On Individual Elements In Setting Er

    1 for one processing interval. For example, suppose the SEL control equation event report generation OGIC setting is set with the detection of the falling edge of an underfrequency element: ... + \81D1T ER = Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 638: Figure G.2 Result Of Falling-Edge Operator On A Deasserting Underfrequency Element

    Element 50P1 can only cause a trip if the reclosing relay shot counter is at shot = 0. When the reclosing relay shot counter is at shot = 0 (see Table 6.3), Relay Word bit SH0 is in the following state: SH0 = 1 (logical 1) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 639 Combination of 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) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 640: Sel Ogic Control Equations

    The SEL control equation settings as a whole in a particular setting group OGIC have the following limitations, according to model number (see Table 1.2): SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 641: Table G.2 Sel Ogic Control Equation Settings Limitations For Different Sel-351 Models

    “xxx” Relay Word bits can still be used and “yy” rising- or falling-edge operators can still be applied in the SEL control equations OGIC for the particular settings group. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 642: Processing Order And Processing Interval

    Section 4 32NE, F32N, R32N, 50P32, F32P, R32P, F32I, R32I, F32V, R32V, F32QG, R32QG, F32Q, R32Q, 32PF, 32QR, 32QF, 32PR, 32GR, 32GF, 32NF, 32NR, NSA, NSB, NSC, F32C, R32C, F32W, R32W SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 643 Breaker remote control bits CC, OC Section 10 Demand Ammeters QDEM, GDEM, NDEM, PDEM Section 8 element status RBADA, CBADA, RBADB, CBADB Appendix I IRRORED Voltage input configuration DELTA, 3V0 Section 9 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
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  • Page 645: Appendix H: Distributed Network Protocol

    The SEL-351 supports DNP point re-mapping. Two modes of operation (both of which are detailed in this appendix) are available: ➤ Standard, for backwards and cross-platform compatibility ➤ Extended, with additional features Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 646: Configuration

    DNPADR DNP Address (0–65534) TIMERQ Minutes for Request Interval (0–32767) CLASSA Class for Analog Event Data (0–3) CLASSB Class for Binary Event Data (0–3) CLASSC Class for Counter Event Data (0–3) SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 647 Number of Events to Transmit on (1–200) AGEEVE Seconds until Oldest Event to Tx on (0.0–60) UTIMEO Seconds to Event Message Confirm Time-out (1–50) 38400 is not available on PORT 1. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 648: Eia-232 Physical Layer Operation

    DCD indication. The timing is the same as above, but PREDLY functions as if it were set to 0, and RTS is not actually deasserted after the PSTDLY time delay expires. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 649: Data-Link Operation

    This hold-off time will be a random value between the MINDLY and MAXDLY setting values. The hold-off time is random which prevents multiple devices waiting to communicate on the network from continually colliding. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 650: Data Access Method

    Set CLASSC = to a non-zero value, according to how often Set UNSOL = Y, messages are desired to be sent. Set NUMEVE and AGEEVE according to how often messages are desired to be sent. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 651: Device Profile

    Reports time-tagged Binary Input change with time binary input change events when no specific variation requested Sends unsolicited responses Configurable with enable/disable unsolicited Sends static data in unsolicited responses Never Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 652 Default counter object/variation Object 20, Variation 6 Counter roll-over 16 bits Sends multifragment responses In all cases within the device profile that an item is configurable, it is controlled by SEL-351 settings. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 653: Object Table

    16-Bit Binary Counter without 0,1,6,7,8 0,1,7,8 Flag 32-Bit Delta Counter without Flag 16-Bit Delta Counter without Flag Frozen Counter—All Variations 32-Bit Frozen Counter 16-Bit Frozen Counter 32-Bit Frozen Delta Counter 16-Bit Frozen Delta Counter Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 654 32-Bit Frozen Counter Event without Time 16-Bit Frozen Counter Event without Time 32-Bit Frozen Delta Counter Event without Time 16-Bit Frozen Delta Counter Event without Time 32-Bit Frozen Counter Event with Time SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 655 Time Frozen Analog Event—All Vari- ations 32-Bit Frozen Analog Event without Time 16-Bit Frozen Analog Event without Time 32-Bit Frozen Analog Event with Time 16-Bit Frozen Analog Event with Time Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 656 1,20,21 6,7,8 File Identifier Internal Indications index = 7 Storage Object Device Profile Private Registration Object Private Registration Object Descriptor Application Identifier Short Floating Point Long Floating Point Extended Floating Point SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 657 Codes Small Packed Binary-Coded Decimal Medium Packed Binary-Coded Decimal Large Packed Binary-Coded Decimal No object 13,14,23 Supported in requests from master May generate in response to master Decimal Hexadecimal Default variation Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 658: Data Map

    VA magnitude (kV) and angle. 30,32 10,11 VB magnitude (kV) and angle. 30,32 12,13 VC magnitude (kV) and angle. 30,32 14,15 VS magnitude (kV) and angle. 30,32 16,17 IG magnitude and angle. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 659 Fault time in DNP format (high, middle, and low 16 bits). 30,32 Relay internal temperature 30,32 Number of unread faults 30,32 51AP setting in primary units 30,32 51BP setting in primary units Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 660 Event-class messages are generated whenever an input changes beyond the value given by the ANADB setting. The dead-band check is done after any scaling is applied. The angles (the odd numbered points in 0–27) will only SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 661: Table H.7 Analog 105 Upper-Byte Definitions

    Pulse RB4 Pulse RB3 Pulse RB4 Pulse RB3 Pulse RB6 Pulse RB5 Pulse RB6 Pulse RB5 Pulse RB6 Pulse RB5 Pulse RB8 Pulse RB7 Pulse RB8 Pulse RB7 Pulse RB8 Pulse RB7 Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 662 After reading the analogs, the master should again check binary input point 1023, which will still be on if there is another unread relay SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 663 23 must be pulsed no faster than once every two seconds. If binary output 23 is pulsed faster, some data may not be recognized and processed by the DNP event scanner. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 664: Point Remapping

    35 1 56 57 58 59 60 61 62 63 64 65 66 67 100 101 102 \<CR> 103<CR> Save Changes (Y/N)? Y <Enter> ==>DNP B <Enter> Enter the new DNP Binary map <CR> ==> SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 665 DNP Address to Report to (0–65534) REPADR Number of Events to Transmit on (1–200) NUMEVE = Seconds until Oldest Event to Tx on (0.0–60.0) AGEEVE Seconds to Event Message Confirm Time-out (1–50) UTIMEO Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 666 DNP Address to Report to (0–65534) REPADR Number of Events to Transmit on (1–200) NUMEVE = Seconds until Oldest Event to Tx on (0.0–60.0) AGEEVE Seconds to Event Message Confirm Time-out (1–50) UTIMEO SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 667: Appendix I: Mirrored Bits (In Firmware Versions 6 And 7)

    Channel status bits are called ROKx, RBADx, OGIC CBADx, and LBOKx and are also usable as inputs to any SEL control OGIC equations. Further channel status information is available via the COM command. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 668: Operation

    SEL-351. The SEL-321 processes power system information each 1/8 power system cycle, but processes the pickup/dropout security counters as messages are received. Since the SEL-321 is receiving messages from the SEL-351, it SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 669: Table I.1 Error Types Reported By The Communications Report

    Table I.1 Error Types Reported by the Communications Report (Sheet 1 of 2) Error Type Description Parity error Data failed UART parity check. Underrun Three M messages IRRORED transmitted without one being received. Overrun UART data buffer overrun. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 670 When the duration of an outage exceeds a user-settable threshold, the relay will assert a user-accessible flag, hereafter called RBADx. When channel unavailability exceeds a user-settable threshold, the relay will assert a user accessible flag, hereafter called CBADx. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 671: Mirrored Bits

    The relay sets RTS IRRORED (to a positive voltage at the EIA-232 connector) for M IRRORED communications using the R6 or original R version of M IRRORED Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 672: Settings

    COMM records. See COMM Command (Communication Data—Available in Firmware Versions 6 and 7) on page 10.15 for a description of the COMM records. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 673 RMB8DO= 1 Supervise the transfer of received data (or default data) to RMB1A–RMB8A with the M pickup and dropout security counters. Set the pickup IRRORED and dropout counters individually for each bit. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
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  • Page 675 RMB_Dropout Debounce msgs (1–8) RMB6DO = IRRORED RMB_Pickup Debounce msgs (1–8) RMB7PU IRRORED RMB_Dropout Debounce msgs (1–8) RMB7DO = IRRORED RMB_Pickup Debounce msgs (1–8) RMB8PU IRRORED RMB_Dropout Debounce msgs (1–8) RMB8DO = IRRORED Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
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  • Page 677: Introduction

    The binary commands and ASCII commands can also be accessed by a device that does not interleave the data streams. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 678: Make Sequential Events Recorder (Ser) Settings With Care

    “writes.” Exceeding the limit can result in an EEPROM self-test failure. An average of one state change every three minutes can be made for a 25-year relay service life. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 679: Recommended Message Usage

    Fast SER messages, if additional SER records are available. When the response number reaches three it wraps around to zero on the next increment. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 680: Functions And Function Codes

    If the SER1, SER2, or SER3 settings are subsequently changed to any non-NA value and SER entries are triggered, unsolicited SER messages will be generated with the new SER records. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 681: Table J.2 Function Code 02 Message Format

    Other values are reserved for future use in multiple frame messages.) Response number (XX = 00, 01, 02, 03, 01, 02...) 00000000 Four bytes reserved for future use as a return routing address. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 682 Two-byte, four-digit year (e.g., 1999 or 07CF hex) of overflow message generation. mmmmmmmm Four-byte time of day in milliseconds since midnight FFFFFFFE Four-byte end-of-records flag 00000000 Element status (unused) cccc Two byte CRC-16 checkcode for message SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 683: Table J.4 Acknowledge Message Format

    A5 46 0E 00 00 00 00 00 00 82 00 XX cc cc (XX is as same as the response number in the “Disable Unsolicited Fast SER Data Transfer” message to which it responds.) Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 684 16 seconds. The relay always requests acknowledgment in unsolicited Fast SER messages (LSB of the status byte is set). Unsolicited Fast SER messages can be enabled on multiple ports simultaneously. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 685 ERATOR Introduction ERATOR ® ™ QuickSet SEL-5030 Software is an easy-to-use yet powerful tool to help get the most out of your SEL-351-5, -6, -7 Relay. Using QuickSet software you will be able to: ERATOR ➤ ® Create, test, and manage settings with a Windows interface.

  • Page 686: Appendix K: Ac Sel Erator Quickset Sel-5030 Software

    Windows NT4 SP3 or later with 32 MB ram (64 MB ram recommended) Windows 2000 with 64 MB ram Disk Space: 25 Mb Communications: EIA-232 serial port for communicating with the relay CD drive: required for installation SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 687: Installation

    If you do not see the toolbar buttons, run the 40ComUpd.exe, located in the install directory. This file will install the proper windows system drivers. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 688: Starting Ac Sel Erator Quickset Software

    Step 4. Double-click the QuickSet software icon if you ERATOR have a desktop shortcut. Step 5. Choose Programs > SEL Applications and select the QuickSet software icon to start the program. ERATOR SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 689: Appendix L: Sel Synchrophasors

    IRIG-B time source with an accuracy of ±10 μs or better. Synchrophasor data are available via the MET PM ASCII command and the SEL Fast Message Unsolicited Write message. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 690: Introduction

    Overview on page D.1. Synchrophasor measurement provides the option to display event report data aligned to a high-accuracy time source. See Synchrophasor-Level Accuracy in Event Reports on page 12.7. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 691: Synchrophasor Measurement

    Relay Word bit TSOK = logical 0. The MET PM command is not available in this case. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 692: External Equipment Compensation

    • 360° ⎛ ⎞ --------- - ⎝ ⎠ freq Δt • freq • 360° Equation L.1 Imaginary A corrected Real Compensation Angle A measured Figure L.3 Correction of Measured Phase Angle SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 693: Protocol Operation

    From ANSI/IEEE Std. 754-1985, The IEEE Standard for Binary Floating-Point Arithmetic. The number and transmit order of Magnitude and Angle data values are determined by the PHDATAV and PHDATAI settings as shown in Table L.8. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 694: Table L.2 Unsolicited Fast Message Enable Packet

    SEL-2032. The connected device controls the PMCU functions of the SEL-351 with SEL Fast Message commands, including commands to start and stop synchrophasor data transmission. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 695: Table L.4 Permissible Message Periods Requested By Enable Message

    Number of Seconds After Messages per Minute the Top of Each Minute 0064h 0,1,2,3,4,5,…,59 00C8h 0,2,4,6,8,10,…,58 012Ch 0,3,6,9,12,15,…,57 0190h 0,4,8,12,15,…,56 01F4h 0,5,10,15,20,…,55 0258h 0,6,12,18,24,…,54 03E8h 0,10,20,30,40,50 05DCh 0,15,30,45 07D0h 0,20,40 0BB8h 0,30 1770h Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 696: Settings

    Some of the other PROTO setting choices may not be available. Set PROTO = SEL to enable (on this port) the SEL Fast Message Synchrophasor protocol. Maximum PORT 1 speed is 19200. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...
  • Page 697 The ICOMP setting allows correction for any steady-state phase errors (from the current transformers or wiring characteristics). TS_TYPE This setting defines the type of connected clock. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...
  • Page 698 When the Time Source Type is set to IEEE, the UTC time value is used in the synchrophasor fast message. The MET PM command still displays the local time. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 699: Synchrophasor Relay Word Bits

    TS_TYPE requirements. PMDOK Phasor Measurement Data OK. Asserts when the SEL-351 is enabled, synchrophasors are enabled (Global setting EPMU = Y), and TSOK is asserted. Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 700: View Synchrophasors By Using The Met Pm Command

    PM 14:14:12.200 results in the same data capture as MET PM 14:14:12, because the relay ignores the fractional seconds. MET PM—Synchrophasor Metering on page 10.25 for complete command options, and error messages. SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 701: Figure L.4 Sample Met Pm Command Response

    The Maximum time synchronization error field is taken directly from the status field of the IRIG-B message. If TS_TYPE = IRIG, the maximum TQUAL time synchronization error will be displayed as $.$$$ Instruction Manual SEL-351-5, -6, -7 Relay Date Code 20070117...

  • Page 702: Communications Bandwidth

    PHDATAI = NA PHDATAV = ALL VA, VB, VC, V1 2400 Baud PHDATAI = NA PHDATAV = ALL VA, VB, VC, V1, IA, IB, IC, I1 4800 Baud PHDATAI = ALL SEL-351-5, -6, -7 Relay Instruction Manual Date Code 20070117...

  • Page 703: Sel-351-5, -6, -7 Relay Command Summary

    SEL-351-5, -6, -7 Relay Command Summary R.Instruction Manual Access Level 0 Access Level 0 is the initial relay access level. The relay automatically returns to Access Level 0 Command when a serial port time-out setting expires or after a QUIT command. The screen prompt is: = Enter Access Level 1.
  • Page 704 SEL-351-5, -6, -7 Relay Command Summary Access Level 1 The Access Level 1 commands allow the user to look at settings information and not change it, Commands and to retrieve and reset event, recorder, and metering data. The screen prompt is: =>...
  • Page 705 SEL-351-5, -6, -7 Relay Command Summary Access Level 1 The Access Level 1 commands allow the user to look at settings information and not change it, Commands and to retrieve and reset event, recorder, and metering data. The screen prompt is: =>...
  • Page 706 SEL-351-5, -6, -7 Relay Command Summary The Access Level 2 commands allow unlimited access to relay settings, parameters, and output Access Level 2 contacts. All Access Level 1 and Access Level B commands are available from Access Level 2. The Commands screen prompt is: =>>...

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