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Schweitzer Engineering SEL-351P Quick Start Manual

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Table of Contents

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S E L - 3 5 1 P
C O N T R O L E D O R E L I G A D O R
Quick-Start
Installation and User's Guide
April 30, 1999

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Summary of Contents for Schweitzer Engineering SEL-351P

  • Page 1 S E L - 3 5 1 P C O N T R O L E D O R E L I G A D O R Quick-Start Installation and User’s Guide April 30, 1999...
  • Page 2 Copyright © SEL 1999 (All rights reserved) Printed in USA. This product is covered by U.S. Patent Numbers: 5,208,545; 5,317,472; 5,602,707; 5,515,227; 5,652,688; 5,349,490; 5,365,396; 5,041,737; 5,479,315; 5,731,943; 5,694,281; and U.S. Patent(s) Pending. Foreign Patents issued. SEL-351P Recloser Control Quick-Start Installation and User’s Guide 990430...

  • Page 3: Table Of Contents

    Capacitor Voltage Monitor and Charger Control..............10 Capacitor Charger Power .......................10 Trip and Close Output Contacts .....................10 SF6 Pressure Sensor .......................11 Checks Before the SEL-351P is Put in Service................11 COMMUNICATIONS................12 Getting Started With Communications ..................12 Communications Connections Example ..................13 Serial Ports .............................14 Serial Port Default Settings......................14...
  • Page 4 Settings Descriptions........................39 Settings Groups 1 (Main) and 2 (Alternate) EZ Settings...............39 Global EZ Settings .........................60 TESTING....................67 Testing the SEL-351P Recloser Control Without Regularly Installed Apparatus ......67 Logic Settings Changes ......................67 Front Panel Status LEDs ......................67 Recloser Simulator .........................68 Output Contacts ........................68 Overcurrent Element Timing Test Setup ..................69...
  • Page 5 Figure 4: Trip and Close Circuit, Breaker Status, and SF6 Pressure Connections ........6 Figure 5: SEL-351P Recloser Control Communications Connections Example ........13 Figure 6: Jumper, Connector, and Major Component Locations on the SEL-351P Recloser Control Main Board.........................24 Figure 7: SEL-351P Recloser Control Front-Panel Interface ..............25 Figure 8: Status and Trip Target LEDs .......................26...

  • Page 7: Introduction

    About This Quick-Start Installation and User's Guide This SEL-351P Recloser Control Quick-Start Installation and User’s Guide helps you install, communicate with, set, and test the SEL-351P in its EZ (“easy”) mode of operation. The EZ mode performs traditional recloser control functions and operations.
  • Page 8 Introduction CAUTION: The SEL-351P contains devices sensitive to Electrostatic Discharge (ESD). When working on the relay module with cover removed, work surfaces and personnel must be properly grounded or equipment damage may result. CAUTION: Do not connect this control to an energized recloser until all control settings have been properly programmed and verified.

  • Page 9: Installation

    Installation NSTALLATION Figure 1: SEL-351P Recloser Control Dimensions and Panel Cutout SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 10: Figure 2: Sel-351P Recloser Control Side Panel

    VOLTAGES connector J3 legend (e.g., • VS, VS or N/C) refers to an ordering option (order all the voltage inputs or just voltage input VA). Figure 2: SEL-351P Recloser Control Side Panel SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 11: Figure 3: Sel-351P Relay Inputs, Outputs, And Communications Ports

    HABILITADO trip Actuator close Operators AJUSTES RELIGADOR FECHAR ALTERNATIVOS FECHADO Capacitor Return BLOQUEIO RELIGADOR ABRIR Charger Power ABERTO (apertar por 3 seg.) DWG: MP351P003 Figure 3: SEL-351P Relay Inputs, Outputs, and Communications Ports SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 12: Figure 4: Trip And Close Circuit, Breaker Status, And Sf6 Pressure Connections

    0.1 A and should be fused for Sensor pressure protection (Bussman GMD-0.125 fuse or equivalent). pressure setting DWG: M351P024A SF6 low pressure warning threshold Figure 4: Trip and Close Circuit, Breaker Status, and SF6 Pressure Connections SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 13: Mounting

    #6-32 bolt or mounting stud, with lock nuts is recommended. Wire Harness Mounting The two studs on top of the SEL-351P can be used to attach wire clamps for a wire harness draped over the top of the unit. The two studs accept #10-32 lock nuts.

  • Page 14: User-Supplied Connectors

    120 Vac power input (POWER connector J6, terminals 8 [+] and 4 [- Use SET n command [n = 1 (main settings), ]) when three-phase voltage is not brought to the SEL-351P. n = 2 (alternate settings)] With factory settings, the front panel FONTE CA LED illuminates when Make the line parameter voltage input VA is energized with nominal 120 Vac.

  • Page 15: 120 Vac Power Input

    NOTE: Anytime 120 Vac power is applied to the SEL-351P, the unit automatically turns on. If no power is connected to the SEL-351P (unit is off) and then 24 Vdc battery power is connected to POWER connector J6 terminals 6 (+) and 2 (-), the unit remains off until the DESPERTAR operator control is pressed.

  • Page 16: Control Connector J5 Details

    When the SEL-351P trips the recloser, the trip output contact moves to the position to connect the trip capacitor (terminal 6) to the magnetic SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 17: Sf6 Pressure Sensor

    See the Settings section for more EZ settings details. Checks Before the SEL-351P is Put in Service CAUTION: Do not connect the SEL-351P to an energized recloser until all control settings have been properly programmed and verified and all front-panel operator controls are in their proper state (see Figure 7).

  • Page 18: Communications

    You can access many of the features of the SEL-351P from the front panel; however, some features can only be accessed from one of the serial ports. Table 2 provides the serial port commands (with descriptions) as well as the corresponding front-panel pushbutton, if applicable.

  • Page 19: Communications Connections Example

    SEL-2020 or SEL-2030 Communications Processors. You can use a variety of terminal emulation programs on your personal computer to communicate with the SEL-351P. Figure 5 presents some example SEL-351P communications connections (see Table 1 and contact SEL for more information).

  • Page 20: Serial Ports

    * Pin 1 not connected for Ports 2 and 3 when shipped from code to either the serial Port 2 or the factory. serial Port 1 connector (see the following EIA-485 Pinout Functions for Port 1), but not both. SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 21: Pinout Functions For Port 1

    (see corresponding cable diagrams on the following SEL-351P Computer (9-pin) C234A page). Contact SEL for SEL-351P Computer (25-pin) C227A information on other available cables. SEL-351P SEL-2020 or SEL-2030 C273A Communications Processor SEL-351P Modem C222 SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 22: Cable Diagrams

    Commands The following serial port commands are available for use with the Commands, passwords, or SEL-351P. Much of the information available from the serial port settings you type appear in commands is also available via the front-panel pushbuttons (see bold/uppercase: DAKOTA.

  • Page 23: Table 2: Sel-351P Recloser Control Command Summary

    Communications Table 2: SEL-351P Recloser Control Command Summary Access Level Corresponding Available Front-Panel Commands Description Pushbutton Access The only operation that can be performed at Access Level 0 is to go to Level 0 Table 4 Access Levels 1 or E. The screen prompt is: = (see Enter Access Level 1.
  • Page 24 Display status of latest battery discharge test and the time remaining until next battery discharge test. BTT NOW Force new battery discharge test immediately. OUTROS SET EZ Change recloser control EZ settings. AJUSTE SET FZ Change recloser control global EZ settings. AJUSTE SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 25 Note: “DISABLE” must be entered in uppercase. PAS E Disables Access Level E password. DISABLE Note: “DISABLE” must be entered in uppercase. PAS B Disables Access Level B password. DISABLE Note: “DISABLE” must be entered in uppercase. SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 26: Event Reports

    Event Reports Event reports are automatically triggered at the beginning of a fault and Note: when the SEL-351P issues a trip. Event report length is 15 cycles The event report length is (factory default). The latest twenty-eight 15-cycle event reports are selectable: 15 or 30 cycles.

  • Page 27: Access Levels And Password Protection

    The SEL-351P ships from the factory with default passwords (see Table 4). If restrictions are to be placed on personnel using the SEL-351P, the factory default passwords must be changed. Make sure that password information is stored for future reference in the event that it is lost or forgotten.

  • Page 28: View Or Change Passwords

    If you wish to disable password protection for a specific access level (must be in Access Level 2), simply set the password to DISABLE (must be uppercase). For example, to disable the Access Level 1 password, type the following: SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 29: Password Jumper

    When the password jumper is OFF (removed/not in place), password contains devices sensitive to protection is enabled. This is how the SEL-351P ships from the factory. Electrostatic Discharge (ESD). Then the only way to disable password protection is with the PAS When working on the relay command (see preceding Disable Passwords subsection).

  • Page 30: Figure 6: Jumper, Connector, And Major Component Locations On The Sel-351P Recloser Control Main Board

    Communications Figure 6: Jumper, Connector, and Major Component Locations on the SEL-351P Recloser Control Main Board SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 31: Front-Panel Interface

    • Pushbuttons • Operator Controls Display (default display shows IA, IB, IC, and IN primary currents) Pushbuttons Status and Trip Target LEDs Operator Controls DWG: MP351P058 Figure 7: SEL-351P Recloser Control Front-Panel Interface SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 32: Status And Trip Target Leds

    Most of the Status and Trip Target LEDs and Operator Controls can change function (if desired by the user) by programming at a higher logic level (see the SEL-351P Manual Técnico). This Front-Panel Interface section discusses each function as shipped from the factory and inscribed on the front panel.

  • Page 33: Table 5: Front-Panel Pushbutton Secondary Functions

    Many of the pushbutton primary functions correspond to serial port commands. Some of the pushbutton primary functions require a password to execute. Refer to Communications section for serial port command, access level, and password information. SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 34: Pushbutton Primary Functions

    MET RD RESET None Reset demand meter values. MET RP None Reset peak meter values. Corresponding Password for Primary Serial Port Front-Panel Function Command Access Level Access Description None Show SEL-351P event data. EVENTOS SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 35 LCD display and second row of front- panel target LEDs. BRK_MON DISPLAY BRE A None Show recloser wear and trip operation counters. RESET BRE R Level B Reset recloser wear and trip operation counters. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 36 Password for Serial Port Front-Panel Primary Command Access Level Access Description Functions ACTIVE GROUP DISPLAY None Show active setting group. CHANGE GRO n Level B Change active setting group to setting group n. SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 37: Operator Controls

    HABILITADO indicate the enabled state. Note: The REMOTO HABILITADO operator control is not operable with the factory settings. See the SEL-351P Manual Técnico for information and ideas on how to program this control. Press the AJUSTES ALTERNATIVOS operator control pushbutton...
  • Page 38 Press the DESPERTAR operator control pushbutton to wake up the DESPERTAR SEL-351P if the front panel is dark (the unit put itself to sleep after an extended outage). After the unit wakes up, the front panel illuminates, and the unit can then be interrogated via the front panel or serial port.
  • Page 39 Option: Set a delay, so the operator can press the ABRIR operator control pushbutton and then move a safe distance away from the recloser before the SEL-351P issues a trip (the ABRIR operator control comes with no set delay in the factory settings). With a set...

  • Page 40: Settings

    Older electronic control designation: Newer microprocessor-based control designation: Traditional recloser curve A and curve 101 are the same curve – use either designation in making curve settings in the SEL-351P. SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 41: Table 6: Recloser Curve Designations

    • 3.5” high-density disk the SEL-5804 TOC [Time-Overcurrent] Recloser Curve Designer • Requires Windows 3.1 or software package) can be downloaded instead to any of the four user- later programmable curves in the SEL-351P. SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 42: Factory Ez Settings

    Settings Factory EZ Settings The SEL-351P ships with the factory EZ settings shown in Table 8. The View EZ Settings With corresponding number references provide a quick way to find the Commands: settings (or subsettings) in the Settings Descriptions subsection that SHO EZ 1 (Group 1) follows.

  • Page 43: Table 8: Ez Settings Quick Reference

    Min. response - phase delay curve (cycles) 0.00* Complex delay curve - ground (Y/N) Const. time adder - ground delay curve (cycles) 0.00* Vert. multiplier - ground delay curve 1.00* Min. response - ground delay curve (cycles) 0.00* SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 44 Battery Amp-hours % Battery capacity for sleep Turn on the 12 V power (Y,N) Keep the 12 V power on while asleep (Y,N) SF6 low pressure warning threshold (atmospheres) *see comments preceding Table 8. SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 45: Settings Descriptions

    CT Ratio 200.0 1.0-6000.0 The CT Ratio (current transformer [ct] ratio) setting programs the SEL-351P to operate with a recloser ct ratio (e.g., for the common recloser ct ratio 200:1, the setting CT Ratio = 200.0 is made). • WARNING: The following settings change in accordance to the CT Ratio setting: Min.
  • Page 46 Complex delay curve - ground (No. 28) Operations - ground fast curve (No. 14) High current trip - ground (No. 30) Operations to lockout - ground (No. 16) High current lockout - ground (No. 32) SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 47 This setting is usually set to N, except for special applications. • This setting is hidden and set to N if Fast curve - phase is programmed with a recloser or user curve. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 48 The Time-dial - phase delay curve setting shifts the US or IEC curve in time by the entered multiplier. • This setting is hidden and nonoperative if Delay curve - phase is programmed with a recloser or user curve. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 49 This is in addition to the built-in 2-cycle time delay. • This setting is hidden and set to zero (0) if Min. trip - SEF (No. 7) is set to OFF. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 50 OFF, the phase delay curve element is still active. If absolutely no phase protection is desired (e.g., “switch” mode), Min. trip - phase (No. 5) or Delay curve - phase (No. 10) must also be set to OFF. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 51 WARNING: If Operations to lockout - phase (No. 15), Operations to lockout - ground (No. 16), and Operations to lockout - SEF (No. 17) are all set to OFF, then overcurrent protection and reclosing are disabled. See similar warnings for preceding setting number 15 and setting number 16. SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 52: Table 9: Seconds-To-Cycles Conversion (60 Hz)

    If a Reclose interval setting is set to zero (0), the corresponding auto reclose attempt and any following auto reclose attempts are aborted. • Note: Reclose intervals should not be set less than 30 cycles, otherwise the control will got to lockout prematurely. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 53 The 24 Vdc battery also has to be connected and healthy in order for reclosing to proceed. • If Close power wait time is set to 0 cycles, then the SEL-351P makes only one check for charged trip and close capacitors, after a reclose interval times out.
  • Page 54 The Const. time adder - ground fast curve setting adds a constant time to the ground fast curve, if set to other than 0 cycles. • This setting is hidden and set to zero (0) if Complex fast curve - ground is set to N. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 55 The Const. time adder - phase delay curve setting adds a constant time to the phase delay curve, if set other than 0 cycles. • This setting is hidden and set to zero (0) if Complex delay curve - phase is set to N. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 56 The Const. time adder - ground delay curve setting adds a constant time to the ground delay curve, if set other than 0 cycles. • This setting is hidden and set to zero (0) if Complex delay curve - ground is set to N. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 57 Due to processor calculations and rounding techniques, displayed range numbers may appear slightly different than expected (e.g., 19.99 instead of 20.00). • This setting is hidden and set to OFF if High current trip - phase is set to N. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 58 If set to zero (0), ground high current tripping operates instantaneously. • This setting is hidden and set to zero (0) if High current trip - ground is set to N. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 59 The High current lockout - phase (multiples of Min. trip - phase) setting determines the exceeded phase current threshold at which the SEL-351P goes to the lockout state immediately when tripping. Example: If High current lockout - phase = 13.00 (multiples of Min. trip - phase) and Min. trip - phase (No.
  • Page 60 - ground The High current lockout - ground (multiples of Min. trip - ground) setting determines the exceeded ground current threshold at which the SEL-351P goes to the lockout state immediately when tripping. Example: If High current lockout - ground = 45.00 (multiples of Min. trip - ground) and Min.
  • Page 61 (threshold remains equal to Min. trip - phase [No. 5]). • This setting is hidden and set to OFF if Cold load pickup scheme is set to N or Delay curve - phase (No. 10) is set to OFF. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 62 SEF elements (e.g., ground could return to normal before phase or SEF, depending on the subsidence rates of inrush currents). • This setting is hidden and set to zero (0) if Cold load pickup scheme is set to N. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 63 Loss of load diversity timer setting. • This setting is hidden and set to N if Restore min. trips - time limit is set to OFF or Delay curve - phase (No. 10) is set to OFF. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 64 Range Incr. Sequence coordination The Sequence coordination setting keeps the SEL-351P in step with a downstream recloser control, preventing the overreaching SEL-351P Fast curve elements from tripping for faults beyond the downstream recloser. Sequence coordination advances the operations counter each time the following sequence occurs: •...
  • Page 65 The Underfrequency time delay setting determines the time delay for underfrequency loadshedding. Setting Default Range Incr. Demand meter time constant 5, 10, 15, 30, 60 minutes The Demand meter time constant setting determines the thermal demand meter response time. SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 66: Global Ez Settings

    Recloser Wear Monitor = Y: The recloser wear monitor must be set at a higher level, with the SET G command (see the SEL-351P Manual Técnico). This setting is usually selected if a circuit breaker is connected to the SEL-351P instead of a GVR recloser.
  • Page 67 SEL-351P goes to sleep, unless communications are actively ongoing with the SEL-351P. • If the % Battery capacity for sleep is set at 0% capacity and the SEL-351P is operating on the battery during an extended outage, the SEL-351P goes to sleep when the temperature-compensated battery voltage measurement falls below 80% nominal voltage, unless communications are actively ongoing with the SEL-351P.
  • Page 68 The application for this feature involves keeping a radio or some device powered to receive a signal to transmit to the WAKE-UP port to wake up the SEL-351P remotely (see the front of Section 10 in the SEL-351P Manual Técnico for more information on the WAKE-UP port).
  • Page 69 Reclose interval 1 0-999999.00 cycles 0.25 Don’t set less than Reclose interval 2 0-999999.00 cycles 0.25 30 cycles, else premature lockout Reclose interval 3 0-999999.00 cycles 0.25 results Reclose interval 4 0-999999.00 cycles 0.25 SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 70 High current lockout - phase High current lockout - phase (range given 1.00-(4000/Min. trip - phase) for CT Ratio = 200.0) multiples of Min. trip - phase 0.01 Activate high current lockout - phase OFF, 1-5 SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 71 Battery Amp-hours 6.5-20.0 Amp-hours % Battery capacity for sleep 0-100% Turn on the 12 V power Keep the 12 V power on while asleep SF6 low pressure warning threshold 0.9 - 2.0 atmospheres SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 72 B (very inverse) class C (extremely inverse) long-time inverse short-time inverse User-Programmable Curves (factory-set) Description DEF_01 definite-time curve (0.1 seconds) DEF_05 definite-time curve (0.5 seconds) DEF_1 definite-time curve (1.0 seconds) DEF_5 definite-time curve (5.0 seconds) SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 73: Testing

    Testing ESTING Read and understand preceding sections so that the SEL-351P can be safely grounded, powered up, and set. Especially understand the Installation section. Testing the SEL-351P Recloser Control Without Regularly Installed Apparatus Refer to Figure 3 and Figure 4 in the Installation section. If the Observe Recloser Count regularly installed apparatus outside the SEL-351P (i.e., the recloser, the...

  • Page 74: Recloser Simulator

    Output Contacts Unless the recloser simulator is designed to accept the same trip/close output that the GVR recloser accepts from the SEL-351P outputs (terminals 7, 8, and 15 of CONTROL connector J5; see Figure 3 and Figure 4), program two of the programmable output contacts for the trip...

  • Page 75: Overcurrent Element Timing Test Setup

    Delay and fast curve overcurrent element specifications are found in the Specifications section (Time-Overcurrent Elements). The curve characteristics are listed in Section 9: Setting the SEL-351P Recloser Control in the SEL-351P Manual Técnico. SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 76: Battery

    Battery ATTERY Battery Operation Overview When 120 Vac power is interrupted to the SEL-351P, a 24 volt Battery Connections: lead-acid battery can supply power to the SEL-351P. The temperature- Connect a 24 volt lead-acid compensated battery monitor/charger monitors battery capacity,...

  • Page 77: Battery Status Via Serial Port

    Even if the battery is fully charged, it is still trickle charged and thus, the SEL-351P is still in the charge mode. After the 24-hour timer times out (and the SEL-351P is still in the charge mode), a 1 Amp load is automatically paralleled with the battery for 5 seconds.

  • Page 78: Battery Load Test Via Front Panel

    (see SEL-351P Manual Técnico). Battery Load Test via Front Panel Press the OUTROS pushbutton on the front panel of the SEL-351P. A new screen appears, with “BTT” (battery test) as one of the choices.
  • Page 79 Battery test state is: OK/FAILED Time until next battery test: XX (hours) The “next battery test” is the automatic load test described in the preceding Automatic Battery Load Test subsection. SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 80: Specifications

    48 Vdc: on for 38.4 - 60 Vdc; off below 28.8 Vdc 24 Vdc: on for 16.0 - 30 Vdc. With nominal control voltage applied, each optoisolated input draws approximately 4 mA of current. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 81 IEC 255-22-3 - 1989 Electrical relays, Section 3: Radiated electromagnetic field disturbance tests, Severity Level: 3 (10 V/m) (type test). IEC 255-22-4 - 1992 Electrical disturbance tests for measuring relays and protection equipment, Section 4: Fast transient disturbance test (type test). SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 82: Relay Element Pickup Ranges And Accuracies

    ±0.01 A and ±3% of setting (1 A nominal) Steady-State Pickup Accuracy: ±1 mA and ±5% of setting (0.05 A nominal channel IN current input) Time Dial Range: 0.50 - 15.00, 0.01 steps (US) SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 83: Under- And Overvoltage Elements

    Pickup Ranges: (reclosing relay and some programmable timers) 0.00 - 16,000.00 cycles, 0.25-cycle steps (some programmable and other various timers) Pickup and dropout accuracy for all timers: ±0.25 cycle and ±0.1% of setting SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 84: Metering Accuracy

    = 0.08% Factory Assistance The employee-owners of Schweitzer Engineering Laboratories, Inc. are dedicated to making electric power safer, more reliable, and more economical. We appreciate your interest in SEL products, and we are committed to making sure you are satisfied. If you have any questions, please contact us at: Schweitzer Engineering Laboratories, Inc.

  • Page 85: Standard Product Warranty

    Repair costs of products not covered under this warranty are paid for by customers. Customers are responsible for the cost of shipping the products to SEL located at: 2350 NE Hopkins Court, Pullman, Washington 99163 USA. SEL-351P Quick-Start Installation and User's Guide (Portuguese)

  • Page 86: Limitations

    To the extent any court, arbitration panel, or other governmental body of competent jurisdiction shall declare any provision of this warranty invalid or unenforceable by reason of a rule of law or public policy, all the other provisions hereof shall remain in full force and effect. SEL-351P Quick-Start Installation and User's Guide (Portuguese)
  • Page 87 SEL-351P CONTROLE DO RELIGADOR Manual Técnico FEBRUARY 15, 1999 IMPORTANT: Use this manual in conjunction with the SEL-351P Quick-Start Installation and User’s Guide. SCHWEITZER ENGINEERING LABORATORIES, INC. 2350 NE HOPKINS COURT PULLMAN, WA USA 99163-5603 TEL: (509) 332-1890 FAX: (509) 332-7990...
  • Page 88 All brand or product names appearing in this document are the trademark or registered trademark of their respective holders. Schweitzer Engineering Laboratories, Inc., SEL , and are registered trademarks of Schweitzer Engineering Laboratories, Inc. OGIC Copyright © SEL 1999 (All rights reserved) Printed in USA.
  • Page 89 Appendix F: Setting Negative-Sequence Overcurrent Elements ® Appendix G: Setting SEL Control Equations OGIC Appendix H: Distributed Network Protocol (DNP) V3.00 Appendix I: M ™ IRRORED SECTION 15: SEL-351P RECLOSER CONTROL COMMAND SUMMARY Date Code 990430 Table of Contents SEL-351P Manual Técnico...
  • Page 90 Figure 4.11: Zero-Sequence Voltage-Polarized, Neutral-Current Directional Element for Neutral Ground Overcurrent Elements Figure 4.13: Routing of Directional Element to Neutral Ground Overcurrent Elements Figure 4.15: Direction Forward/Reverse Logic for Neutral Ground Overcurrent Elements Date Code 990430 Manual Change Information SEL-351P Manual Técnico...
  • Page 91 Appendix H: − Changed the setting range of setting UTIMEO to 1 - 50 seconds. − Corrected the designation for the ECLASS setting in Table H.1. 990215 New Manual Release. Manual Change Information Date Code 990430 SEL-351P Manual Técnico...
  • Page 93 Other operator control pushbutton outputs operate similarly to TERRA HABILITADO.....................1-44 BLOQUEIO Operator Control Pushbutton Output.............1-44 ABRIR and FECHAR Operator Control Pushbutton Outputs ........1-45 Corresponding Operator Control LEDs and Logic Applications ........1-47 TERRA HABILITADO Operator Control..............1-48 Date Code 990430 Factory-Set Logic SEL-351P Manual Técnico...
  • Page 94 Figure 1.23: Drive-to-Lockout Logic – Part 1 of 3..................1-34 Figure 1.24: Drive-to-Lockout Logic – Part 2 of 3..................1-35 Figure 1.25: Drive-to-Lockout Logic – Part 3 of 3..................1-36 Figure 1.26: Block Reset Timing Logic ....................1-37 Factory-Set Logic Date Code 990430 SEL-351P Manual Técnico...
  • Page 95 Figure 1.27: Sequence Coordination Logic .....................1-37 Figure 1.28: Phase Coordination of SEL-351Ps in Series ...............1-39 Figure 1.29: Operation of SEL-351P(1) Sequence Coordination Logic for Phase Fault Beyond Downstream SEL-351P(2) ...................1-40 Figure 1.31: Operator Controls – TERRA HABILITADO through BLOQUEIO........1-42 Figure 1.32: Operator Controls – SEF HABILITADO through ABRIR ..........1-43 Figure 1.33: TERRA HABILITADO Operator Control Pushbutton Output...........1-44...

  • Page 97: Section 1: Factory-Set Logic

    (see Figure 2.2 through Figure 2.4), some changes might be made to the factory-set logic, as detailed in the text accompanying these figures. Also, if the SEL-351P is applied in “nonstandard” applications (e.g., at a cogeneration interconnection point), changes would probably be made to the factory-set logic.
  • Page 98 EM reset - ground delay curve 51G2RS 51N2RS Time delay - SEF 67N3D Operations - phase fast curve OPPH Operations - ground fast curve OPGR Operations to lockout - phase OPLKPH Operations to lockout - ground OPLKGR Factory-Set Logic Date Code 990430 SEL-351P Manual Técnico...
  • Page 99 Min. response - ground delay curve 51G2MR 51N2MR High current trip - phase (Y/N) High current trip - phase 50P2P Time delay - phase high current trip 67P2D Activate high current trip - phase HITRPH Date Code 990430 Factory-Set Logic SEL-351P Manual Técnico...
  • Page 100 Restore min. trip - ground RPGR Restore min. trip - SEF RPSEF Sequence coordination (Y/N) ESEQ Ground trip precedence (Y/N) PRECED Underfrequency loadshedding (Y/N) Underfrequency pickup 81D1P Underfrequency time delay 81D1D Demand meter time constant DMTC Factory-Set Logic Date Code 990430 SEL-351P Manual Técnico...

  • Page 101: Overcurrent Element Functions Overview

    51G2P, 51G2C, 51G2TD, 51G2RS, 51G2CT, 51G2MR 51N2P, 51N2C, 51N2TD, 51N2RS, 51N2CT, 51N2MR 67N3T SEF element 50N3P, 67N3D 67P2T High current trip - phase 50P2P, 67P2D 67G2T, 67N2T High current trip - ground 50G2P, 67G2D, Date Code 990430 Factory-Set Logic SEL-351P Manual Técnico...

  • Page 102: Residual Ground Vs. Neutral Ground

    (see Tables 9.3 and 9.4). The associated overcurrent element settings listed in Table 1.2 and SEL Control Equations settings are found in the settings sheets at the end of Section 9: OGIC Setting the SEL-351P Recloser Control. The factory default SEL Control Equations OGIC settings are explained in the remainder of this section.

  • Page 103: Cold Load Pickup Scheme

    EZ settings is made (enabling the loss of load diversity timer, SV6PU): • Cold load pickup-phase ≠ OFF (Relay Word bit CLP = logical 1) • Cold load pickup-ground ≠ OFF (Relay Word bit CLG = logical 1) Date Code 990430 Factory-Set Logic SEL-351P Manual Técnico...

  • Page 104: Start Loss Of Load Diversity Timer

    Recloser is open (Relay Word bit 52A = logical 0) • SEL-351P is in the lockout state (Relay Word bit 79LO = logical 1) or the reclosing relay is defeated EZ setting Reclose interval 1 = 0 (SET EZ command) or enable setting E79 = N (SET n command) defeats the reclosing relay (it is effectively nonexistent;...

  • Page 105: Actively Engage Cold Load Pickup Scheme (Phase Elements Example)

    SV7PU (=900 cycles from factory) is the qualifiying time for cold load pickup phase current below normal Min. trip - phase DWG: M351R030 Figure SECTION 1: .2: Cold Load Pickup Scheme Seal-in Logic for Phase Overcurrent Elements Date Code 990215 Factory-Set Logic SEL-351P Manual Técnico...
  • Page 106 SV11PU (=900 cycles from factory) is the qualifying time for cold load pickup phase current below normal Min. trip - SEF DWG: M351R032 Figure SECTION 1: .4: Cold Load Pickup Scheme Seal-in Logic for SEF Overcurrent Elements 1-10 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 107: Use Overcurrent Element Torque Control Logic To Enable/Disable Or Desensitize Elements (Phase Elements Example)

    When the cold load pickup scheme is actively engaged for the phase elements, the lower portion of the 51P2T phase overcurrent element (below pickup 50P5P) is effectively disabled. Note that the 51P2T phase overcurrent element is not shifted – coordination is maintained. Date Code 990215 Factory-Set Logic 1-11 SEL-351P Manual Técnico...

  • Page 108: Disengage Cold Load Pickup Scheme (Phase Elements Example)

    Figure SECTION 1: .2, which has just been examined. A few details need to be explained concerning the operation of the cold load pickup scheme for the ground and SEF elements: 1-12 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 109: Fast Curve Operation Logic

    Note: The above table presumes that five trip operations are set (four reclosures in between them). If the SEL-351P is set for fewer trip operations, the shot counter does not increment to the higher shots (e.g., the shot counter doesn’t increment to shot = 4 if only four trip operations are set).

  • Page 110: Fast Curve Operation When Reclosing Is Defeated

    79RS, 79CY, 79LO (reclosing relay states) The logic at the top of Figure SECTION 1: .6 and Figure SECTION 1: .7 enables set phase and ground fast curves, respectively, when reclosing is defeated. 1-14 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 111 Used in the torque control setting 51P1TC OGIC to enable/disable phase overcurrent element 51P1T (see Figure 1.15) OPPH = 4 DWG: M351R067 OPPH = 5 Figure SECTION 1: .6: Operations-Phase Fast Curve Logic Date Code 990215 Factory-Set Logic 1-15 SEL-351P Manual Técnico...
  • Page 112 51G1TC to enable/ disable ground overcurrent elements 51N1T (neutral) OPGR = 4 and 51G1T (residual), respectively (see Figure 1.15) DWG: M351R069 OPGR = 5 Figure SECTION 1: .7: Operations-Ground Fast Curve Logic 1-16 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 113: Logic

    (reclosing relay states) The logic at the top of Figure SECTION 1: .11 and Figure SECTION 1: .12 enables set phase and ground high current trips, respectively, when reclosing is defeated. Date Code 990215 Factory-Set Logic 1-17 SEL-351P Manual Técnico...
  • Page 114 Used in the following settings to OGIC realize drive-to- lockout conditions: OPLKPH = 4 SV15 SV16 (see Figure 1.24) OPLKPH = 5 DWG: M351R057 Figure SECTION 1: .8: Operations to Lockout - Phase Logic 1-18 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 115 Used in the following settings to OGIC realize drive-to- lockout conditions: OPLKGR = 4 SV15 SV16 (see Figure 1.24) OPLKGR = 5 DWG: M351R059 Figure SECTION 1: .9: Operations to Lockout - Ground Logic Date Code 990215 Factory-Set Logic 1-19 SEL-351P Manual Técnico...
  • Page 116 Used in the following setting to OGIC realize a drive-to- lockout condition: OPLKSF = 4 79DTL (see Figure 1.25) OPLKSF = 5 DWG: M351R060 Figure SECTION 1: .10: Operations to Lockout - SEF Logic 1-20 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 117 67P2TC OGIC to enable/disable phase overcurrent element HITRPH = 4 67P2T (see Figure 1.17) HITRPH = 5 DWG: M351R062 Figure SECTION 1: .11: Activate High Current Trip - Phase Logic Date Code 990215 Factory-Set Logic 1-21 SEL-351P Manual Técnico...
  • Page 118 HITRGR = 4 elements 67N2T (neutral) and 67G2T (residual), respectively (see Figure 1.17) HITRGR = 5 DWG: M351R063 Figure SECTION 1: .12: Activate High Current Trip - Ground Logic 1-22 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 119 67P1TC OGIC to enable/disable phase overcurrent element 67P1 HILKPH = 4 (see Figure 1.17) HILKPH = 5 DWG: M351R064 Figure SECTION 1: .13: Activate High Current Lockout - Phase Logic Date Code 990215 Factory-Set Logic 1-23 SEL-351P Manual Técnico...
  • Page 120 Note that all the ground overcurrent elements are controlled by the TERRA HABILITADO operator control (via Relay Word bit LT1) and the SEF overcurrent elements are controlled by the SEF HABILITADO operator control (via Relay Word bit LT5). 1-24 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 121 51G1TC (see Figure TERRA HABILITADO 3.18) operator control ON (see Figure 1.37) DWG: MP351P013 Figure SECTION 1: .15: Fast Curve - Phase (top) and Fast Curve - Ground (bottom) Enable/Disable Logic Date Code 990215 Factory-Set Logic 1-25 SEL-351P Manual Técnico...
  • Page 122 TERRA HABILITADO operator control ON (see Figure 1.37) DWG: MP351P014 Figure SECTION 1: .16: Delay Curve - Phase (top) and Delay Curve - Ground (bottom) Enable/Disable Logic 1-26 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 123 ON (see Figure 1.37) Input into 67G1 logic 67G1TC (see Figure 3.10) DWG: MP351P015 Figure SECTION 1: .17: High Current Trip (top) and High Current Lockout (bottom) Enable/Disable Logic Date Code 990215 Factory-Set Logic 1-27 SEL-351P Manual Técnico...

  • Page 124: Trip Logic

    Figure SECTION 1: .19 propagates into the trip logic (see Figure 5.1). The trip signal output (Relay Word bit TRIP) is then routed to the final trip/close logic and subsequent output contacts (see Figure 7.29). 1-28 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 125: Close Logic

    Hot line tag – supervises FECHAR operator control and serial port CLOSE command • Trip capacitor charged – supervises FECHAR operator control and serial port CLOSE command (the recloser might need to trip right after it is closed) Date Code 990215 Factory-Set Logic 1-29 SEL-351P Manual Técnico...

  • Page 126: Unlatch Close Conditions

    Close Conditions – Other Than Auto-Reclosing Unlatch Close Conditions Figure SECTION 1: .21 shows the means to unlatch the close signal output. Other unlatch close logic details in Figure SECTION 1: .21: 1-30 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 127: Recloser Status

    Figure SECTION 1: .22 (see also Figure 7.29). The greater pickup delay (1 cycle) compensates for the recloser auxiliary contacts operating faster than the circuit breaker main contacts for close operations and provides more time qualification for contact bounce. Date Code 990215 Factory-Set Logic 1-31 SEL-351P Manual Técnico...

  • Page 128: Operations To Lockout

    (Relay Word bits OLP, OLG, and OLS) is used in the drive-to-lockout logic in Figure SECTION 1: .24 and top of Figure SECTION 1: .25. The SEL-351P is driven to lockout if all the following are true: • The number of trip operations is greater than or equal to setting Operations to lockout -...

  • Page 129: High-Current Lockout

    − Ground trip precedence disabled and phase fault current above Min. trip - phase level The SEL-351P is driven to lockout (regardless of the Ground trip precedence setting) if all the following are true: • An overcurrent trip is in progress (except SEF element trip) •...

  • Page 130: Other Drive-To-Lockout Conditions

    Otherwise, 67G1 operates as the High current lockout - ground element (67N1 is turned off automatically). Other Drive-to-Lockout Conditions The SEL-351P is driven to lockout if a trip operation occurs or the recloser opens while either of the following are true: •...
  • Page 131 - ground and set operations to lockout - phase SV16 (drive-to- lockout conditions derived from operations to lockout DWG: M351R024 conditions) Figure SECTION 1: .24: Drive-to-Lockout Logic – Part 2 of 3 Date Code 990215 Factory-Set Logic 1-35 SEL-351P Manual Técnico...

  • Page 132: Block Reset Timing

    Reset timing is also blocked if tripping is in progress. After block reset conditions are gone, the reset timer fully loads up again and then begins timing if the recloser is closed. 1-36 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 133: Sequence Coordination

    Besides the Sequence coordination EZ setting, the factory-set sequence coordination logic requires both the following be true: • SEL-351P is in the Reset state (Relay Word bit 79RS = logical 1) • Fast curve - phase or Fast curve - ground is picked up (Relay Word bit pickup indicator...
  • Page 134 Once shot counter = 2, Fast curve-phase is disabled. Then when downstream SEL-351P(2) is operating on Delay curve - phase, the SEL-351P(1) Fast curves are out of the way – the SEL-351P(1) does not overtrip for a fault beyond SEL-351P(2).
  • Page 135 Delay curve - phase [SEL-351P(1)] Delay curve - phase [SEL-351P(2)] Fast curve - phase [51P1T; (SEL-351P(1)] Fast curve - phase [SEL-351P(2)] 51P1 DWG: M351P034 Figure SECTION 1: .28: Phase Coordination of SEL-351Ps in Series Date Code 990215 Factory-Set Logic 1-39 SEL-351P Manual Técnico...

  • Page 136: Reclose Supervision Logic

    OGIC See Figure SECTION 1: .30. After a reclose interval times out, a final check is made of the reclose supervision logic before the SEL-351P auto-recloses the recloser. For auto-reclosing to proceed, all the following conditions must be met: •...

  • Page 137: Trip And Close Capacitors Charged

    If the battery fails the load test, Relay Word bit DTFAIL remains asserted to logical 1 until the next load test is successfully passed. See the Battery section in the SEL-351P Quick-Start Installation and User’s Guide and subsection Battery System Monitor in Section 8: Breaker/Recloser Monitor, Battery System Monitor, Metering, and Load Profile Functions for more information.
  • Page 138 Figure 1.43 ALTERNATIVOS BLOQUEIO LED5 = !LT4 Figure 1.34 Figure 1.44 = NOT (LT4) (apertar por 3 seg.) DWG: MP351P021 Figure SECTION 1: .31: Operator Controls – TERRA HABILITADO through BLOQUEIO 1-42 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 139: Detailed Operator Control Pushbutton Output

    Relay Word bit PB1 asserts to logical 1 immediately for one processing interval. The corresponding TERRA HABILITADO LED (controlled by SEL setting LED1) is OGIC independent of the TERRA HABILITADO operator control pushbutton. Date Code 990215 Factory-Set Logic 1-43 SEL-351P Manual Técnico...

  • Page 140: Other Operator Control Pushbutton Outputs Operate Similarly To Terra Habilitado

    LED5) is independent of OGIC the BLOQUEIO operator control pushbutton, unless the BLOQUEIO operator control pushbutton is pressed for the three seconds (and the LED flashes), as described in Figure SECTION 1: .34. 1-44 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 141: Abrir And Fechar Operator Control Pushbutton Outputs

    The corresponding RELIGADOR FECHADO and RELIGADOR ABERTO LEDs (controlled by settings LED8 and LED9, respectively) are independent of the FECHAR and ABRIR OGIC operator control pushbuttons, unless the FECHAR or ABRIR operator control pushbutton is Date Code 990215 Factory-Set Logic 1-45 SEL-351P Manual Técnico...
  • Page 142 If time delay setting PB8D is set PB8D=0 (no time delay), then Relay Word bit PB8 functions in a manner similar to Figure 1.33. DWG: MP351P025 Figure SECTION 1: .35: FECHAR Operator Control Pushbutton Output 1-46 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 143: Corresponding Operator Control Leds And Logic Applications

    LED operation and logic applications. Note that the pushbutton output corresponds number-wise to the LED setting – for example: TERRA HABILITADO operator control pushbutton output: TERRA HABILITADO LED SEL Control Equations setting: LED1 OGIC Date Code 990215 Factory-Set Logic 1-47 SEL-351P Manual Técnico...

  • Page 144: Terra Habilitado Operator Control

    Momentarily press the TERRA HABILITADO operator control pushbutton again and LT1 resets to logical 0 All latches (LT1 through LT8) are non-volatile (retain their state if the SEL-351P is powered down and then powered up again). The latch output (Relay Word Bit LT1) propagates to the following logic: •...
  • Page 145 Thus the REMOTO HABILITADO operator control is not functional from the factory (corresponding LED is extinguished all the time, too; SEL OGIC setting LED3 = 0, see Figure SECTION 1: .31). Date Code 990215 Factory-Set Logic 1-49 SEL-351P Manual Técnico...
  • Page 146 (pulsed output PB6) and operation of the corresponding LED. Note that the BLOQUEIO operator control logic supervises the SEF HABILITADO operator control. The BLOQUEIO operator control has to be OFF (LT4 = logical 1) in order for the SEF 1-50 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 147 Momentarily press the SEF HABILITADO operator control pushbutton again and LT5 resets to logical 0 All latches (LT1 through LT8) are non-volatile (retain their state if the SEL-351P is powered down and then powered up again). The latch output (Relay Word Bit LT5) propagates to the following logic: •...
  • Page 148 SS1 nor SS2 has to be maintained at logical 1 in order for the active OGIC setting group to remain at setting group 1 or setting group 2, respectively. See Multiple Settings Groups subsection in Section 7: Inputs, Outputs, Timers, and Other Control Logic. 1-52 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 149 Figure SECTION 1: .34) and LT4 resets to logical 0. All latches (LT1 through LT8) are non-volatile (retain their state if the SEL-351P is powered down and then powered up again). The latch output (Relay Word bit LT4) propagates to the following logic: •...
  • Page 150 ANEL TATUS AND ARGET See Figure 8 in the Front-Panel Interface section in the SEL-351P Quick-Start Installation and User’s Guide for an explanation of the factory-set operation for the front-panel status and trip target LEDs. See Figure SECTION 1: .45 through Figure SECTION 1: .48. The front-panel status and trip target LEDs (except the CONTROLE HABILITADO status LED and the A, B, and C fault-type trip target LEDs) are programmable.
  • Page 151 LED14L = Y LED (Y/N)? LED15L = Y LED16L = Y LED17L = Y CURVA ALTA RELÉ TRIP RÁPIDA CORRENTE FREQ. DWG: MP351P036 Figure SECTION 1: .46: Front-Panel Trip Target LEDs Date Code 990215 Factory-Set Logic 1-55 SEL-351P Manual Técnico...
  • Page 152 (disabled). The front-panel HOT LINE TAG LED is always extinguished. Relay Word bit LT7 is also embedded in close logic (CL and ULCL) and drive-to-lockout (79DTL) factory settings. OGIC 1-56 Factory-Set Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 153 ULCL (unlatch close), edge and 79DTL (drive-to- lockout) SEL detect OGIC settings. (See Figures DWG: MP351P012 1.20, 1.21, and 1.25.) Figure SECTION 1: .50: Remote Control of Hot Line Tag Date Code 990215 Factory-Set Logic 1-57 SEL-351P Manual Técnico...
  • Page 155 Figure 2.2: Installation with Separate 120 Vac Power and Three-Phase Voltage........2-6 Figure 2.3: Installation with Separate 120 Vac Power, Three-Phase, and Synchronism Check Voltage ...........................2-6 Figure 2.4: Installation with Only Three-Phase Voltage (120 Vac power provided by three-phase voltage)...........................2-7 Date Code 990215 Additional Installation Details SEL-351P Manual Técnico...

  • Page 157: Section 2: Additional Installation Details

    ONTROL UMPER The SEL-351P has a dedicated alarm output contact (labeled ALARM – see Figure 3 in the Installation section of the SEL-351P Quick-Start Installation and User’s Guide). Often more than one alarm output contact is needed for such applications as local or remote annunciation, backup schemes, etc.
  • Page 158 ALARM output contact), it will be in the opposite state of the dedicated ALARM output contact in a standard relay shipment. In a standard SEL-351P shipment, the dedicated ALARM output contact comes as a “b” type output contact and all the other output contacts (including the “extra alarm”) come as “a”...

  • Page 159: Password And Breaker Jumpers

    232 serial port pin functions. In a standard SEL-351P shipment, the jumpers are “OFF” (removed/not in place) so that the +5 Vdc is not connected to Pin 1 on the corresponding EIA-232 serial ports. Put the jumpers “ON” (in place) so that the +5 Vdc is connected to Pin 1 on the corresponding EIA-232 serial ports.

  • Page 160: Clock Battery

    No. BR2335 or equivalent. At room temperature (25°C), the battery will nominally operate for 10 years at rated load. If power is lost or disconnected, the battery discharges to power the clock. When the SEL-351P is powered from an external source, the battery only experiences a low self-discharge rate. Thus, battery life can extend well beyond the nominal 10 years because the battery rarely has to discharge after the relay is installed.
  • Page 161 SEL-351P Quick-Start Installation and User’s Guide for voltage input polarity details: • 120 Vac power (pins 8 [+] and 4 [-], POWER connector J6) • VA (pins 10 [+] and 5 [-], VOLTAGES connector J3) • VB (pins 9 [+] and 4 [-], VOLTAGES connector J3) •...
  • Page 162 Installation with Separate 120 Vac Power and Three-Phase Voltage Source Load Control Cable (120 Vac Power) SEL-351P 120 Vac Power DWG: M351P030 Figure SECTION 2: .3: Installation with Separate 120 Vac Power, Three-Phase, and Synchronism Check Voltage Additional Installation Details Date Code 990215 SEL-351P Manual Técnico...

  • Page 163: Installation With Only 120 Vac Power (Traditional Installation)

    See Figure SECTION 2: .1. This is the traditional recloser control installation – only single- phase 120 Vac power is brought to the SEL-351P. Jumpers from the 120 Vac power to voltage input VA are installed. Voltage input VA is then in parallel with the incoming 120 Vac power.

  • Page 164: Undervoltage Block For Frequency Elements

    Installation with Only Three-Phase Voltage (120 Vac Power Provided by Three-Phase Voltage) See Figure SECTION 2: .4. Only three-phase voltage is brought to the SEL-351P. Jumpers from the 120 Vac power to voltage input VA are installed. The three-phase voltage must be 120 Vac nominal (phase-to-neutral).
  • Page 165 Reset Timing Details (51P1T element example) ............3-22 Setting 51P1RS = Y ....................3-22 Setting 51P1RS = N ....................3-22 Neutral Ground Time-Overcurrent Elements ..............3-22 Settings Ranges ......................3-24 Accuracy ........................3-24 Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements SEL-351P Manual Técnico...

  • Page 166: Voltage)

    Underfrequency Element..................3-49 Frequency Element Operation ....................3-49 Overfrequency Element Operation ................3-49 Underfrequency Element Operation ................3-50 Frequency Element Voltage Control................3-50 Other Uses for Undervoltage Element 27B81.............3-50 Frequency Element Uses.....................3-50 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...
  • Page 167 Figure 3.4: Combined Single-Phase Instantaneous Overcurrent Elements ..........3-6 Figure 3.5: SEL-351P Recloser Control Nondirectional Instantaneous Overcurrent Element Pickup Time Curve......................3-7 Figure 3.6: SEL-351P Recloser Control Nondirectional Instantaneous Overcurrent Element Reset Time Curve........................3-7 Figure 3.7: Levels 1 through 4 Phase-to-Phase Instantaneous Overcurrent Elements ......3-9 Figure 3.8: Levels 1 through 4 Neutral Ground Instantaneous/Definite-Time Overcurrent...
  • Page 168 Compensated by Breaker Close Time (f < f shown as reference in this example) ...............3-42 Figure 3.27: Undervoltage Block for Frequency Elements ..............3-46 Figure 3.28: Levels 1 through 6 Frequency Elements ................3-47 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 169: Section 3: Overcurrent, Voltage, Synchronism Check, And Frequency Elements

    OVERCURRENT, VOLTAGE, SYNCHRONISM CHECK, AND FREQUENCY ELEMENTS Many of the elements described in this section are used in the factory-set logic for the SEL-351P Recloser Control. Refer to Table1.1 in Section 1: Factory-Set Logic for the correlation between the EZ settings that drive this factory-set logic and the “regular” settings that set many of the elements in this section.
  • Page 170 Figure SECTION 3: .1: Levels 1 through 4 Phase Instantaneous Overcurrent Elements Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 171: Pickup Operation

    Ideally, set 50P1P > 50P2P > 50P3P > 50P4P so that instantaneous overcurrent elements 67P1 through 67P4 will display in an organized fashion in event reports (see Figure SECTION 3: .3 and Table 12.3). Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements SEL-351P Manual Técnico...
  • Page 172 Figure SECTION 3: .3: Levels 1 through 4 Phase Instantaneous/Definite-Time Overcurrent Elements (with Directional Control Option) Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 173: Directional Control Option

    1 (e.g., 67P3TC = 1) for the factory default settings. See SHO Command (Show/View Settings) in Section 10: Serial Port Communications and Commands for a list of the factory default settings. Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements SEL-351P Manual Técnico...

  • Page 174: Combined Single-Phase Instantaneous Overcurrent Elements

    Pickup and Reset Time Curves Figure SECTION 3: .5 and Figure SECTION 3: .6 show pickup and reset time curves applicable to all nondirectional instantaneous overcurrent elements in the SEL-351P (60 Hz or 50 Hz Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 175: Phase-To-Phase Instantaneous Overcurrent Elements

    > 4: add 0.50 cycle Maximum Minimum Applied Current (Multiples of Pickup Setting) Figure SECTION 3: .5: SEL-351P Recloser Control Nondirectional Instantaneous Overcurrent Element Pickup Time Curve Maximum Minimum Applied Current (Multiples of Pickup Setting) Figure SECTION 3: .6:...

  • Page 176: Setting Range

    Figure SECTION 3: .1, Figure SECTION 3: .2, and Figure SECTION 3: .3 in the preceding Phase Instantaneous/Definite-Time Overcurrent Elements subsection, substituting current I (channel IN current) for phase currents and substituting like settings and Relay Word bits. Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...
  • Page 177 Figure SECTION 3: .7: Levels 1 through 4 Phase-to-Phase Instantaneous Overcurrent Elements Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements SEL-351P Manual Técnico...
  • Page 178 Figure SECTION 3: .8: Levels 1 through 4 Neutral Ground Instantaneous/Definite- Time Overcurrent Elements (with Directional Control Option) 3-10 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 179: Settings Ranges

    ±0.25 cycles and ±0.1% of setting Timer: ±5% of setting Transient Overreach: Pickup and Reset Time Curves See Figure SECTION 3: .5 and Figure SECTION 3: .6. Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-11 SEL-351P Manual Técnico...

  • Page 180: Residual Ground Instantaneous/Definite-Time Overcurrent Elements

    Figure SECTION 3: .10 and Figure SECTION 3: .11. Figure SECTION 3: .10: Levels 1 through 4 Residual Ground Instantaneous/Definite- Time Overcurrent Elements (with Directional Control Option) 3-12 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 181: Settings Ranges

    ±0.25 cycles and ±0.1% of setting Timer: ±5% of setting Transient Overreach: Pickup and Reset Time Curves See Figure SECTION 3: .5 and Figure SECTION 3: .6. Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-13 SEL-351P Manual Técnico...

  • Page 182: Negative-Sequence Instantaneous/Definite-Time Overcurrent Elements

    ±0.25 cycles and ±0.1% of setting Timer: ±5% of setting Transient Overreach: Pickup and Reset Time Curves See Figure SECTION 3: .5 and Figure SECTION 3: .6. 3-14 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...
  • Page 183 Figure SECTION 3: .12: Levels 1 through 4 Negative-Sequence Instantaneous/Definite-Time Overcurrent Elements (with Directional Control Option) Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-15 SEL-351P Manual Técnico...

  • Page 184: Time-Overcurrent Elements

    Besides the settings involved with the Torque Control Switch operation in Figure SECTION 3: .14 and Figure SECTION 3: .15, the 51P1T and 51P2T phase time-overcurrent elements have the following settings: 3-16 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...
  • Page 185 Note: SEL Control Equation torque control settings (e.g., 51P1TC) cannot be set directly OGIC to logical 0. See Section 9: Setting the SEL-351P Recloser Control for additional time-overcurrent element setting information. Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-17 SEL-351P Manual Técnico...
  • Page 186 Figure SECTION 3: .14: Phase Time-Overcurrent Element 51P1T (with Directional Control Option) Figure SECTION 3: .15: Phase Time-Overcurrent Element 51P2T (with Directional Control Option) 3-18 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 187: Accuracy

    ≤ pickup setting 51P1P and the phase time-overcurrent element = 0 (logical 0), if I is timing to reset (not yet fully reset) Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-19 SEL-351P Manual Técnico...

  • Page 188: Torque Control Switch Open

    Figure SECTION 3: .14 is asserted to logical 1 continuously. Then, only the corresponding Control Equation torque control setting 51P1TC has to be considered in the control of OGIC 3-20 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 189: Torque Control

    Control Equation torque control settings are set to provide directional OGIC control. See Directional Control Provided by Torque Control Settings at the end of Section 4: Loss-of-Potential, Load Encroachment, and Directional Element Logic. Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-21 SEL-351P Manual Técnico...

  • Page 190: Reset Timing Details (51P1T Element Example)

    51P1R (reset indication) = logical 1 when the element is fully reset. Neutral Ground Time-Overcurrent Elements Figure SECTION 3: .16: Neutral Ground Time-Overcurrent Element 51N1T (with Directional Control Option) 3-22 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...
  • Page 191 Figure SECTION 3: .14 in the preceding Phase Time-Overcurrent Elements subsection, substituting current I (channel IN current) for maximum phase current I and substituting like settings and Relay Word bits. Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-23 SEL-351P Manual Técnico...

  • Page 192: Settings Ranges

    OGIC (i.e., 51N1TC = 0), then corresponding neutral ground time-overcurrent element 51N1T is defeated and nonoperational, regardless of any other setting. 51N2T is similar. See Section 9: Setting the SEL-351P Recloser Control for additional time-overcurrent element setting information. Accuracy Pickup: ±1 mA secondary and ±5% of setting (0.05 A nominal channel IN current input) ±1.50 cycles and ±4% of curve time for currents between (and including) 2...
  • Page 193 Figure SECTION 3: .18: Residual Ground Time-Overcurrent Element 51G1T (with Directional Control Option) Figure SECTION 3: .19: Residual Ground Time-Overcurrent Element 51G2T (with Directional Control Option) Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-25 SEL-351P Manual Técnico...

  • Page 194: Accuracy

    OGIC (i.e., 51G1TC = 0), then corresponding residual ground time-overcurrent element 51G1T is defeated and nonoperational, regardless of any other setting. 51G2T is similar. See Section 9: Setting the SEL-351P Recloser Control for additional time-overcurrent element setting information. Accuracy Pickup: ±0.01 A secondary and ±3% of setting (1 A nominal phase current inputs, IA, IB, IC) ±1.50 cycles and ±4% of curve time for currents between (and including) 2...

  • Page 195: Negative-Sequence Time-Overcurrent Element

    (ACB rotation), where a = 1 ∠ 120° and a = 1 ∠ -120°] for maximum · I + a · I phase current I and like settings and Relay Word bits. Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-27 SEL-351P Manual Técnico...

  • Page 196: Settings Ranges

    OGIC (i.e., 51QTC = 0), then corresponding negative-sequence time-overcurrent element 51QT is defeated and nonoperational, regardless of any other setting. See Section 9: Setting the SEL-351P Recloser Control for additional time-overcurrent element setting information. Accuracy Pickup: ±0.01 A secondary and ±3% of setting (1 A nominal phase current inputs, IA, IB, IC) ±1.50 cycles and ±4% of curve time for currents between (and including) 2...

  • Page 197: Voltage Elements

    Phase-to-phase voltage Zero-sequence voltage Negative-sequence voltage Positive-sequence voltage Synchronism check voltage, from SEL-351P rear-panel voltage input VS* *Voltage V is used in the synchronism check elements described in the following subsection Synchronism Check Elements. Voltage V is also used in the three voltage elements described at the end of Table SECTION 3: .8 and Figure SECTION 3: .26.
  • Page 198 0.0 - 150.0 V secondary 59QP 0.0 - 100.0 V secondary 59V1 59V1P 0.0 - 150.0 V secondary 27SP Figure SEC 0.0 - 150.0 V secondary TION 3: 3-30 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...
  • Page 199 59S1 59S1P 0.0 - 150.0 V secondary 59S2 59S2P 0.0 - 150.0 V secondary Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-31 SEL-351P Manual Técnico...
  • Page 200 Figure SECTION 3: .21: Single-Phase and Three-Phase Voltage Elements 3-32 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...
  • Page 201 Figure SECTION 3: .22: Phase-to-Phase and Sequence Voltage Elements Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-33 SEL-351P Manual Técnico...

  • Page 202: Accuracy

    (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) 3-34 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 203: Overvoltage Element Operation Example

    If the voltages are static (voltages not slipping with respect to one another), the two synchronism check elements operate as shown in the top of Figure SECTION 3: .23. The angle settings are checked for synchronism check closing. Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-35 SEL-351P Manual Técnico...

  • Page 204: Synchronism Check Elements Settings

    Table 9.3 Accuracy ±1 V and ±5% of setting Voltage Pickup: ±5% of setting Voltage Transient Overreach: Slip Pickup: 0.003 Hz ± 2 ° Angle Pickup: 3-36 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...
  • Page 205 Figure SECTION 3: .24: Synchronism Check Voltage Window and Slip Frequency Elements Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-37 SEL-351P Manual Técnico...

  • Page 206: Synchronism Check Elements Voltage Inputs

    The two synchronism check elements are single-phase elements, with single-phase voltage inputs and V used for both elements: Phase input voltage (V , or V ), designated by setting SYNCP (e.g., if SYNCP = VB, then V 3-38 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 207: System Frequencies Determined From Voltages V

    Synchronism check voltage, from SEL-351P rear-panel voltage input VS For example, if V is designated as phase input voltage V (setting SYNCP = VB), then rear-panel voltage input VS is connected to B-phase on the other side of the circuit breaker. The voltage across VB is synchronism checked with the voltage across VS (see Figure 2.1).

  • Page 208: Block Synchronism Check Conditions

    , but in fact “slipping” ahead of voltage V . In a time period of one second, the angular distance between voltage V and voltage V changes by 0.10 slip cycles, which translates into: 3-40 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 209: Angle Difference Calculator

    Difference Calculator calculates the angle difference between voltages V and V Angle Difference = ⏐(∠V - ∠V )⏐ Voltages V and V are “Slipping” Refer to bottom of Figure SECTION 3: .25. Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-41 SEL-351P Manual Técnico...
  • Page 210 Figure SECTION 3: .26: Angle Difference Between V and V Compensated by Breaker Close Time (f < f shown as reference in this example) 3-42 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 211: P And

    . In order to initiate circuit breaker closing when V is in-phase with V (Angle Difference = 0°), V has to slip around another revolution, relative to V Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-43 SEL-351P Manual Técnico...

  • Page 212: Synchronism Check Element Outputs

    Supervision) is checked only once to see if it is asserted to logical 1. If it is not asserted to logical 1, the relay goes to the Lockout State. 3-44 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 213: Synchronism Check Applications For Automatic Reclosing And Manual Closing

    (25º) than for an automatic reclose (15º). 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). Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-45 SEL-351P Manual Técnico...

  • Page 214: Frequency Elements

    EZ settings (see Figure 1.19 in Section 1: Factory-Set Logic in this manual and the Underfrequency loadshedding setting in Table 8 and subsection Settings Descriptions in the Settings section in the SEL-351P Quick-Start Installation and User’s Guide). For various connections, Figure 1.31 through Figure 1.34 and associated text in subsection Reclose Supervision Logic in Section 1: Factory-Set Logic discuss possible changes necessary to the factory default undervoltage block setting 27B81P (see Figure SECTION 3: .27 and...
  • Page 215 Figure SECTION 3: .28: Levels 1 through 6 Frequency Elements Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-47 SEL-351P Manual Técnico...

  • Page 216: Accuracy

    Note that pickup settings 81D1P through 81D6P are compared to setting NFREQ. NFREQ is the nominal frequency setting (a global setting), set to 50 or 60 Hz. 3-48 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...

  • Page 217: Overfrequency Element

    81D1 = logical 1 (instantaneous element) 81D1T = logical 1 (time delayed element) Relay Word bit 81D1T asserts to logical 1 only after time delay 81D1D. Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-49 SEL-351P Manual Técnico...

  • Page 218: Underfrequency Element Operation

    The instantaneous frequency elements (81D1 through 81D6) are used in testing only. The time-delayed frequency elements (81D1T through 81D6T) are used for underfrequency load shedding, frequency restoration, and other schemes. 3-50 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 990430 SEL-351P Manual Técnico...
  • Page 219 Convert Maximum Loads to Equivalent Secondary Impedances .........4-4 Convert Power Factors to Equivalent Load Angles..............4-5 Apply Load-Encroachment Logic to a Phase Time-Overcurrent........4-5 Use SEL-321 Relay Application Guide for the SEL-351P Recloser Control ......4-7 Directional Control for Neutral Ground and Residual Ground Overcurrent Elements....4-7 Internal Enables ........................4-8 Best Choice Ground Directional™...
  • Page 220 Phase Overcurrent Elements .................4-23 Figure 4.18: Positive-Sequence Voltage-Polarized Directional Element for Phase Overcurrent Elements ........................4-24 Figure 4.19: Routing of Directional Elements to Negative-Sequence and Phase Overcurrent Elements ........................4-25 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...
  • Page 221 Figure 4.20: Direction Forward/Reverse Logic for Negative-Sequence Overcurrent Elements .....4-25 Figure 4.21: Direction Forward/Reverse Logic for Phase Overcurrent Elements........4-26 Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic SEL-351P Manual Técnico...

  • Page 223: Section 4: Loss-Of-Potential, Load Encroachment, And Directional Element Logic

    3PVOLT = Y). Even if the LOP logic is not used (i. e., no directional overcurrent elements are used), setting 3PVOLT = Y should still be made (SET G command) if true three-phase voltage is connected to the SEL-351P. Loss-of-potential is declared (Relay Word bit LOP = logical 1) when a 10% drop in V...

  • Page 224: Setting Elop = Y Or Y1

    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). Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...

  • Page 225: Load-Encroachment Logic

    Forward load (load flowing out) lies within the hatched region labeled ZLOUT. Relay Word bit ZLOUT asserts to logical 1 when the load lies within this hatched region. Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic SEL-351P Manual Técnico...

  • Page 226: Settings Ranges

    2010 A primary • (1/CT ratio) = 2010 A primary • (1 A seconday/400 A primary) = 5.03 A secondary 132.8 kV • (1000 V/kV) = 132800 V primary Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...

  • Page 227: Convert Power Factors To Equivalent Load Angles

    Refer to Figure SECTION 4: .3. In a load condition, the apparent positive-sequence impedance is within the ZLOUT area, resulting in: ZLOAD = ZLOUT + ZLIN = logical 1 + ZLIN = logical 1 Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic SEL-351P Manual Técnico...
  • Page 228 - if 50P6 picks up, there is assuredly a fault. For faults below the pickup level of 50P6, but above the pickup of phase time-overcurrent element 51PT, the Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...

  • Page 229: Use Sel-321 Relay Application Guide For The Sel-351P Recloser Control

    Encroachment Function Setting Guidelines) for applying the load-encroachment logic in the SEL-351P. Note that Application Guide AG93-10 discusses applying the load-encroachment feature to phase distance elements in the SEL-321 Relay. Although the SEL-351P does not have phase distance elements, the principles and settings example in this guide are still applicable.

  • Page 230: Internal Enables

    The internal enables 32QGE and 32VE have the following correspondence to the directional elements: 32QGE Negative-sequence voltage-polarized directional element 32VE Zero-sequence voltage-polarized, residual-current directional element and zero-sequence voltage-polarized, neutral-current directional element Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...

  • Page 231: Best Choice Ground Directional™ Logic

    (Relay Word bit 32GF) and reverse (Relay Word bit 32GR) logic points and then on to the direction forward/reverse logic in Figure SECTION 4: .14. Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic SEL-351P Manual Técnico...

  • Page 232: Loss-Of-Potential

    1. The Level 1 overcurrent elements referenced in Figure SECTION 4: .14 and Figure SECTION 4: .15 are then not controlled by the directional control logic. 4-10 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...
  • Page 233 Provided by Torque Control Settings at the end of this section describes how to avoid this limitation for special cases. Figure SECTION 4: .5: Internal Enables (32QE and 32QGE) Logic for Negative- Sequence Voltage-Polarized Directional Elements Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-11 SEL-351P Manual Técnico...
  • Page 234 OGIC Setting enable OGIC E32IV Relay Word Bits 32QGE DWG: M351R152 32VE Figure SECTION 4: .7: Internal Enable (32NE) for Zero-Sequence Voltage- Polarized, Neutral-Current Directional Element 4-12 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...
  • Page 235 Figure SECTION 4: .8: Best Choice Ground Directional Logic Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-13 SEL-351P Manual Técnico...
  • Page 236 Figure SECTION 4: .9: Negative-Sequence Voltage-Polarized Directional Element for Neutral Ground and Residual Ground Overcurrent Elements 4-14 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...
  • Page 237 Figure SECTION 4: .10: Zero-Sequence Voltage-Polarized, Residual-Current Directional Element for Neutral Ground and Residual Ground Overcurrent Elements Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-15 SEL-351P Manual Técnico...
  • Page 238 Note: 1 ∠ Z0L = One OHM At The Zero-Sequence Line Angle Figure SECTION 4: .11: Zero-Sequence Voltage-Polarized, Neutral-Current Directional Elements for Neutral Ground Overcurrent Elements 4-16 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...
  • Page 239 Figure SECTION 4: .12: Routing of Directional Elements to Residual Ground Overcurrent Elements Figure SECTION 4: .13: Routing of Directional Elements to Neutral Ground Overcurrent Elements Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-17 SEL-351P Manual Técnico...
  • Page 240 Figure SECTION 4: .14: Direction Forward/Reverse Logic for Residual Ground Overcurrent Elements 4-18 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...
  • Page 241 Figure SECTION 4: .15: Direction Forward/Reverse Logic for Neutral Ground Overcurrent Elements Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-19 SEL-351P Manual Técnico...

  • Page 242: Internal Enables

    (see Figure SECTION 4: .4). The settings involved with internal enable 32QE in Figure SECTION 4: .5 (e.g., settings a2, k2) are explained in a following subsection Directional Control Settings. 4-20 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...

  • Page 243: Directional Elements

    ELOP = Y. Refer to Figure SECTION 4: .1 and accompanying text for more information on loss-of- potential. Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-21 SEL-351P Manual Técnico...

  • Page 244: Direction Forward/Reverse Logic

    Subsection Directional Control Provided by Torque Control Settings at the end of this section describes how to avoid this limitation for special cases. 4-22 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...
  • Page 245 Figure SECTION 4: .17: Negative-Sequence Voltage-Polarized Directional Element for Negative-Sequence and Phase Overcurrent Elements Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-23 SEL-351P Manual Técnico...
  • Page 246 Figure SECTION 4: .18: Positive-Sequence Voltage-Polarized Directional Element for Phase Overcurrent Elements 4-24 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...
  • Page 247 Figure SECTION 4: .19: Routing of Directional Elements to Negative-Sequence and Phase Overcurrent Elements Figure SECTION 4: .20: Direction Forward/Reverse Logic for Negative-Sequence Overcurrent Elements Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-25 SEL-351P Manual Técnico...
  • Page 248 Figure SECTION 4: .21: Direction Forward/Reverse Logic for Phase Overcurrent Elements 4-26 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...

  • Page 249: Directional Control Settings

    They have to be set by the user, whether setting E32 = AUTO or Y. These settings are: DIR1, DIR2, DIR3, DIR4, ORDER, 50P32P, and E32IV All these settings are explained in detail in the remainder of this subsection. Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-27 SEL-351P Manual Técnico...

  • Page 250: Settings

    Level 3 overcurrent elements set direction reverse (DIR3 = R) In some applications, level direction settings DIR1 through DIR4 are not flexible enough in assigning the desired direction for certain overcurrent elements. Subsection Directional Control 4-28 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...

  • Page 251: Order - Ground Directional Element Priority Setting

    .7. In this case, directional control will be provided for neutral ground overcurrent elements only. Setting ORDER can be set with any element combination (e.g., ORDER = VQ, ORDER = Q). Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-29 SEL-351P Manual Técnico...

  • Page 252: 50P32P - Phase Directional Element Three-Phase Current Pickup

    If enable setting E32 = Y, settings Z2F and Z2R (negative-sequence impedance values) are calculated by the user and entered by the user, but setting Z2R must be at least 0.5 Ω secondary greater in value than setting Z2F. 4-30 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...

  • Page 253: 50Qfp - Forward Directional Negative-Sequence Current Pickup

    ) 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 ( I Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-31 SEL-351P Manual Técnico...

  • Page 254: K2 - Zero-Sequence Current Restraint Factor, I

    > ⋅ . directional elements to be enabled ( I ). Again, this presumes at least one of the internal enables 32VE or 32IE is asserted. 4-32 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...

  • Page 255: 50Gfp - Forward Directional Residual Ground Current Pickup

    It keeps the element from operating for zero-sequence current (system unbalance), which circulates due to line asymmetries, CT saturation during three-phase faults, etc. a0 Set Automatically Date Code 990430 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-33 SEL-351P Manual Técnico...

  • Page 256: Z0F - Forward Directional Z0 Threshold

    For situations where zero-sequence source isolation can occur (e.g., by the opening of a circuit breaker) and result in possible mutual coupling problems for the zero-sequence voltage-polarized 4-34 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 990430 SEL-351P Manual Técnico...

  • Page 257: Directional Control Provided By Torque Control Settings

    Control Equation setting E32IV should be deasserted to logical 0. OGIC In this example, this is accomplished by connecting a circuit breaker auxiliary contact from the identified circuit breaker to the SEL-351P: E32IV = IN106 (52a connected to optoisolated input IN106) Almost any desired control can be set in SEL Control Equation setting E32IV.
  • Page 259 Trip Settings Differences Between the SEL-321 and SEL-351P Recloser Control.........................5-12 Permissive Overreaching Transfer Trip (POTT) Logic .............5-12 Use Existing SEL-321 Relay POTT Application Guide for the SEL-351P Recloser Control ........................5-13 External Inputs ........................5-13 PT1 – Received Permissive Trip Signal(s) ..............5-13 Timer Settings........................5-14...
  • Page 260 Figure 5.6: POTT Logic...........................5-16 Figure 5.7: Permissive Input Logic Routing to Trip Logic ..............5-17 Figure 5.8: SEL-351P Recloser Control Connections to Communications Equipment for a Two- Terminal Line POTT Scheme ..................5-18 Figure 5.9: SEL-351P Recloser Control Connections to Communications Equipment for a Three- Terminal Line POTT Scheme ..................5-18...
  • Page 261 Figure 5.11: Unblocking Block Logic Routing to Trip Logic ..............5-23 Figure 5.12: SEL-351P Recloser Control Connections to Communications Equipment for a Two- Terminal Line DCUB Scheme (setting ECOMM = DCUB1) ........5-24 Figure 5.13: SEL-351P Recloser Control Connections to Communications Equipment for a Three-Terminal Line DCUB Scheme (setting ECOMM = DCUB2)......5-24...

  • Page 263: Section 5: Trip And Target Logic

    Unlatch Trip Conditions. TDURD Minimum Trip Duration Time. This timer establishes the minimum time duration for which the TRIP Relay Word bit asserts. This is rising edge initiated timer. The settable Date Code 990215 Trip and Target Logic SEL-351P Manual Técnico...
  • Page 264 Figure 7.29 . The logic in Figure 7.29 controls dedicated trip and close output contacts and prevents the trip and close output contacts from being asserted at the same time. Trip and Target Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 265: Set Trip

    1, regardless of other trip logic conditions. The Minimum Trip Duration Timer can be set no less than 4 cycles. Figure SECTION 5: .2: Minimum Trip Duration Timer Operation (see bottom of Figure SECTION 5: .1) Date Code 990215 Trip and Target Logic SEL-351P Manual Técnico...

  • Page 266: Unlatch Trip

    Figure 7.29 takes care of all timing issues concerning the dedicated trip output contact. The TRIP Relay Word bit output of the trip logic in Figure SECTION 5: .1 (that follows the TDURD timer) propagates to the final trip/close logic in Figure 7.29. Trip and Target Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 267: Program An Output For Tripping

    TRSOTF (e.g., TRSOTF = 50P2) to trip after the circuit breaker closes. Figure SECTION 5: .3 and the following discussion describe the three-pole open (3PO) logic and the SOTF logic. Date Code 990215 Trip and Target Logic SEL-351P Manual Técnico...

  • Page 268: Three-Pole Open Logic

    Three-Pole Open Logic Three-pole open (3PO) logic is the top half of Figure SECTION 5: .3. It is not affected by enable setting ESOTF (see Settings Sheet 1 of 23 in Section 9: Setting the SEL-351P Recloser Control). The open circuit breaker condition is determined from the combination of: •...

  • Page 269: Determining Three-Pole Open Condition Without Circuit Breaker Auxiliary Contact

    Circuit breaker closure is detected by monitoring the dc close bus. This is accomplished by wiring an optoisolated input on the SEL-351P (e.g., IN104) to the dc close bus. When a manual close or automatic reclosure occurs, optoisolated input IN7 is energized. SEL...

  • Page 270: Switch-Onto-Fault Logic Output (Sotfe)

    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. Trip and Target Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 271: Enable Setting Ecomm

    OMMUNICATIONS SSISTED OGIC ENERAL VERVIEW The SEL-351P includes communications-assisted tripping schemes that provide unit-protection for transmission lines with the help of communications. No external coordination devices are required. Figure SECTION 5: .4: Communications-Assisted Tripping Scheme Refer to Figure SECTION 5: .4 and the top half of Figure SECTION 5: .1.

  • Page 272: Trip Setting Trcomm

    67P2S Level 2 directional phase instantaneous overcurrent element (with delay 67P2SD) 67N2S Level 2 directional neutral ground instantaneous overcurrent element (with delay 67N2SD) 5-10 Trip and Target Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 273: Trip Settings Trsotf And Tr

    Use Existing SEL-321 Relay Application Guides for the SEL-351P Recloser Control The communications-assisted tripping schemes settings in the SEL-351P are very similar to those in the SEL-321 Relay. Existing SEL-321 Relay application guides can also be used in setting up these schemes in the SEL-351P.

  • Page 274: Optoisolated Input Settings Differences Between The Sel-321 And Sel-351P Recloser Control

    Control The SEL-351P does not have optoisolated input settings like the SEL-321 Relay. Rather, the optoisolated inputs of the SEL-351P are available as Relay Word bits and are used in SEL OGIC Control Equations. The following optoisolated input setting example is for a Permissive Overreaching Transfer Trip (POTT) scheme.

  • Page 275: Use Existing Sel-321 Relay Pott Application Guide For The Sel-351P Recloser Control

    Provides a secure means of tripping for weak- and/or zero-infeed line terminals. Use Existing SEL-321 Relay POTT Application Guide for the SEL-351P Recloser Control Use the existing SEL-321 Relay POTT application guide (AG95-29) to help set up the SEL-351P in a POTT scheme (see preceding subsection Communications-Assisted Trip Logic – General Overview for more setting comparison information on the SEL-321/SEL-351P).

  • Page 276: Timer Settings

    Figure SECTION 5: .1. Timer Settings See Section 9: Setting the SEL-351P Recloser Control for setting ranges. Z3RBD – Zone (Level) 3 Reverse Block Delay Current-reversal guard timer – typically set at 5 cycles.

  • Page 277: Ekey - Echo Key Permissive Trip

    In a three-terminal line scheme, output contact OUT107 is set the same as OUT105 (see Figure SECTION 5: .9): OUT107 = KEY EKEY – Echo Key Permissive Trip Permissive trip signal keyed by Echo logic (used in testing). Date Code 990215 Trip and Target Logic 5-15 SEL-351P Manual Técnico...
  • Page 278 Figure SECTION 5: .6: POTT Logic 5-16 Trip and Target Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 279: Variations For Permissive Underreaching Transfer Trip (Putt) Scheme

    Figure SECTION 5: .9 shows output contacts OUT105 and OUT107 connected to separate communications equipment, for the two remote terminals. Both output contacts are programmed the same (OUT105 = KEY and OUT107 = KEY). Date Code 990215 Trip and Target Logic 5-17 SEL-351P Manual Técnico...

  • Page 280: Directional Comparison Unblocking (Dcub) Logic

    (TX) on the communication equipment in Figure SECTION 5: .9. Then output contact OUT107 can be used for another function. Figure SECTION 5: .8: SEL-351P Recloser Control Connections to Communications Equipment for a Two-Terminal Line POTT Scheme Figure SECTION 5: .9:...

  • Page 281: Use Existing Sel-321 Relay Dcub Application Guide For The Sel-351P Recloser Control

    In two-terminal line DCUB applications (setting ECOMM = DCUB1), a permissive trip signal is received from one remote terminal. One optoisolated input on the SEL-351P (e.g., input IN104) is driven by a communications equipment receiver output (see Figure SECTION 5: .12). Make...

  • Page 282: Timer Settings

    (two-terminal line application) In three-terminal line DCUB applications (setting ECOMM = DCUB2), loss-of-guard signals are received from two remote terminals. Two optoisolated inputs on the SEL-351P (e.g., input IN105 and IN107) are driven by communications equipment receiver outputs (see Figure SECTION 5: .13).
  • Page 283 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 SECTION 5: .1. When UBB asserts to logical 1, tripping is blocked. Date Code 990215 Trip and Target Logic 5-21 SEL-351P Manual Técnico...
  • Page 284 Figure SECTION 5: .10: DCUB Logic 5-22 Trip and Target Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 285: Ptrx1, Ptrx2 - Permissive Trip Receive Outputs

    Depending on the installation, perhaps one output contact (e.g., OUT105 = KEY) could be connected in parallel to both transmitter inputs (TX) on the communications equipment in Figure SECTION 5: .13. Then output contact OUT107 can be used for another function. Date Code 990215 Trip and Target Logic 5-23 SEL-351P Manual Técnico...

  • Page 286: Use Existing Sel-321 Relay Dcb Application Guide For The Sel-351P Recloser Control

    Extends the received block signal by a settable time. Use Existing SEL-321 Relay DCB Application Guide for the SEL-351P Recloser Control Use the existing SEL-321 Relay DCB application guide (AG93-06) to help set up the SEL-351P in a DCB scheme (see preceding subsection Communications-Assisted Trip Logic – General Overview for more setting comparison information on the SEL-321/SEL-351P).

  • Page 287: External Inputs

    (two-terminal line application) In three-terminal line DCB applications, block trip signals are received from two remote terminals. Two optoisolated inputs on the SEL-351P (e.g., input IN104 and IN106) are driven by communications equipment receiver outputs (see Figure SECTION 5: .16). Make SEL...

  • Page 288: Logic Outputs

    (see Figure SECTION 5: .15). In a three-terminal line scheme, output contact OUT104 is set the same as OUT106 (see Figure SECTION 5: .16): OUT104 = STOP 5-26 Trip and Target Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 289: Btx - Block Trip Extension

    Depending on the installation, perhaps one output contact (e.g., OUT105 = DSTRT + NSTRT) can be connected in parallel to both START inputs on the communications equipment in Figure SECTION 5: .16. Then output contact OUT107 can be used for another function. Date Code 990215 Trip and Target Logic 5-27 SEL-351P Manual Técnico...
  • Page 290 Figure SECTION 5: .16 also shows communication equipment RX (receive) output contacts from each remote terminal connected to separate inputs IN104 and IN106 on the SEL-351P. The inputs operate as block trip receive inputs for the two remote terminals and are used in the...

  • Page 291: Additional Front-Panel Status And Target Led Information

    A, B, and C phase targeting is more secure if both the following are true: • True three-phase voltage is connected to the SEL-351P • Setting 3PVOLT = Y is made (SET G command) Target Reset/Lamp Test Front-Panel Pushbutton When the Target Reset/Lamp Test front-panel pushbutton is pressed: •...
  • Page 292 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. 5-30 Trip and Target Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 293 Unlatch Reclose Supervision Logic (bottom of Figure 6.2) .........6-8 Settings Example 1 .......................6-9 SEL-351P(1) Recloser Control ..................6-9 SEL-351P(2) Recloser Control ..................6-9 Other Setting Considerations for SEL-351P(1) and SEL-351P(2) Recloser Controls .......................6-10 Settings Example 2 ......................6-10 Reclosing Relay ..........................6-11 Reclosing Relay States and General Operation ..............6-12...
  • Page 294 Figure 6.2: Reclose Supervision Logic (following open interval time-out) ..........6-5 Figure 6.3: Reclose Supervision Limit Timer Operation (refer to bottom of Figure 6.2)......6-6 Figure 6.4: SEL-351P Recloser Controls Installed at Both Ends of a Transmission Line in a High-Speed Reclose Scheme ..................6-9 Figure 6.5: Reclosing Relay States and General Operation ..............

  • Page 295: Section 6: Close And Reclose Logic

    (e.g., manual close initiation via serial port or optoisolated inputs). If automatic reclosing is not needed, but the SEL-351P Recloser Control is to close the circuit breaker for other close conditions (e.g., manual close initiation via serial port or optoisolated inputs), then this subsection is the only subsection that needs to be read in ®...

  • Page 296: Set Close

    Figure 7.29 . The logic in Figure 7.29 controls dedicated trip and close output contacts and prevents the trip and close output contacts from being asserted at the same time. Close and Reclose Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 297: Unlatch Close

    Control Equations. For example, if the following setting is made: OGIC 52A = IN101 (52a auxiliary contact wired to input IN101) 52A = !IN101 (52b auxiliary contact wired to input IN101) Date Code 990215 Close and Reclose Logic SEL-351P Manual Técnico...
  • Page 298 CLOSE Relay Word bit to logical 1. This input into the close logic in Figure SECTION 6: .1 is an output of the reclose supervision logic in the following Figure SECTION 6: .2. Close and Reclose Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 299 Figure SECTION 6: .2: Reclose Supervision Logic (following open interval time-out) Date Code 990215 Close and Reclose Logic SEL-351P Manual Técnico...
  • Page 300 Figure SECTION 6: .3: Reclose Supervision Limit Timer Operation (refer to bottom of Figure SECTION 6: .2) Close and Reclose Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 301: Settings And General Operation

    79CLSD (Reclose Supervision Limit Time) See the settings sheets at the end of Section 9: Setting the SEL-351P Recloser Control for setting ranges. Reclose Supervision Limit Time = 0 (top of Figure SECTION 6: .2) 79CLSD = 0.00 With this setting, the logic in the top of Figure SECTION 6: .2 is operative.

  • Page 302: Set Reclose Supervision Logic (Bottom Of Figure 6.2)

    Control Equation setting 79CLS indicates successful propagation of a reclosing OGIC relay open interval time-out condition on to the close logic in Figure SECTION 6: .1. See Settings Example 2 that follows in this subsection. Close and Reclose Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 303: Settings Example 1

    = monitored single-phase transmission line voltage (channel VS) is dead SEL-351P(2) Recloser Control The SEL-351P(2) checks that Bus 2 voltage is hot, the transmission line voltage is hot, and in synchronism after the reclosing relay open interval times out, before allowing circuit breaker 52/2 to be reclosed.

  • Page 304: Other Setting Considerations For Sel-351P(1) And Sel-351P(2) Recloser Controls

    The SEL-351P(2) starts open interval timing after circuit breaker 52/1 at the remote end has reenergized the line. The SEL-351P(2) has to see Bus 2 hot, transmission line hot, and in synchronism across open circuit breaker 52/2 for open interval timing to begin. Thus,...

  • Page 305: Reclosing Relay

    The reclose enable setting, E79, has setting choices N, 1, 2, 3, and 4. Setting E79 = N defeats the reclosing relay. Setting choices 1 through 4 are the number of desired automatic reclosures (see Open Interval Timers that follows in this subsection). Date Code 990215 Close and Reclose Logic 6-11 SEL-351P Manual Técnico...

  • Page 306: Reclosing Relay States And General Operation

    When in a given state, the corresponding Relay Word bit asserts to logical 1, and the LED illuminates. Automatic reclosing only takes place when the relay is in the Reclose Cycle State. 6-12 Close and Reclose Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 307: Lockout State

    79RSLD after the settings change and goes to the Reset State (if it is not already in the Reset State), and the shot counter returns to shot = 0. If the relay happens to trip during this reset timing, the SEL-351P will immediately go to the Lockout State, because shot = last shot.

  • Page 308: Defeat The Reclosing Relay

    These settings are explained later in this section. See also the settings sheets at the end of Section 9: Setting the SEL-351P Recloser Control. If the reclosing relay is defeated, the following also occur: •...

  • Page 309: Reclosing Relay Timer Settings

    The operation of these timers is affected by SEL Control Equation settings discussed later in OGIC this section. Also see the settings sheets at the end of Section 9: Setting the SEL-351P Recloser Control. Open Interval Timers The reclose enable setting, E79, determines the number of open interval time settings that can be set.

  • Page 310: Determination Of Number Of Reclosures (Last Shot)

    Observe the reclosing relay shot counter operation, especially during testing, with the front-panel shot counter screen (accessed via the OTHER pushbutton). See Functions Unique to the Front- Panel Interface in Section 11: Additional Front-Panel Interface Details. 6-16 Close and Reclose Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 311: Reset Timer

    (e.g., it is in the Reset State or in the Lockout State), OPTMN deasserts to logical 0. The SEL-351P can only time on an open interval when it is in the Reclose Cycle State, but just because the relay is in the Reclose Cycle State does not necessarily mean the relay is timing on an open interval.

  • Page 312: Reclosing Relay Shot Counter

    Refer to Figure SECTION 6: .6. The shot counter increments for each reclose operation. For example, when the SEL-351P is timing on open interval 1, 79OI1, it is at shot = 0. When the open interval times out, the shot counter increments to shot = 1 and so forth for the set open intervals that follow.

  • Page 313: Reclose Initiate And Reclose Initiate Supervision Settings (79Ri And 79Ris, Respectively)

    SEL-351P to successfully initiate reclosing and start timing on the first open interval. The SEL-351P is not yet in the reclose cycle state (79CY = logical 0) at the instant of the first trip operation.

  • Page 314: Additional Settings Example

    – the fast curve/instantaneous trip operation (reclose initiation) occurs before the SEL-351P sees the recloser close. If a flashover occurs in a recloser tank during an open interval (recloser open and the SEL-351P calls for a trip), the SEL-351P goes immediately to lockout.

  • Page 315: Drive-To-Lockout And Drive-To-Last Shot Settings (79Dtl And 79Dls, Respectively)

    (e.g., 79RI = !52A - see Additional Settings Example in the preceding setting 79RI [reclose initiation] discussion. Then the drive-to-lockout condition overlaps reclose initiation and the SEL-351P stays in lockout after the breaker trips open.

  • Page 316: Other Settings Considerations

    Three open intervals are also set in the factory settings, resulting in last shot = 3. Any time the SEL-351P is in the lockout state (Relay Word bit 79LO = logical 1), the SEL-351P is driven to last shot (if the shot counter is not already at a shot value greater than or equal to shot = 3):...

  • Page 317: Factory Settings Example

    = logical 0, regardless of Relay Word bit 50P2. Additional Settings Example 2 If the SEL-351P is used on a feeder with a line-side independent power producer (cogenerator), the utility should not reclose into a line still energized by an islanded generator. To monitor line voltage and block reclosing, connect a line-side single-phase potential transformer to channel VS on the SEL-351P as shown in Figure SECTION 6: .7.

  • Page 318: Additional Settings Example 3

    Depending on how setting 79BRS is set, none, one, or both of these reset times can be controlled. If the reset timer is timing and then 79BRS asserts to: 79BRS = logical 1 6-24 Close and Reclose Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 319: Sequence Coordination Setting (79Seq)

    Refer to Figure SECTION 6: .8. In order for the sequence coordination logic in SEL-351P (1) to increment the shot counter by one count to keep in step with the operation of downstream SEL-351P (2), all the following have to occur in SEL-351P (1): •...

  • Page 320: Reclose Supervision Setting (79Cls)

    [51P1T; (SEL-351P(1)] Fast curve-phase [SEL-351P(2)] 51P1 DWG: MP351P050 Figure SECTION 6: .8: SEL-351P Recloser Controls in Series, Requiring Sequence Coordination Reclose Supervision Setting (79CLS) See Reclose Supervision Logic earlier in this section. 6-26 Close and Reclose Logic Date Code 990215...
  • Page 321 Control Equation Settings SS1 through SS6 ......... 7-20 OGIC Operation of Serial Port GROUP Command and Front-Panel GROUP Pushbutton..7-20 SEL-351P Disabled Momentarily During Active Setting Group Change ......7-21 Active Setting Group Switching Example 1 ...............7-21 Start Out in Setting Group 1 ..................7-23 Switch to Setting Group 4...................7-23...
  • Page 322 Trip and Close Circuits, Breaker Status, and SF6 Gas Pressure ..........7-41 TABLES Table 7.1: Correspondence Between Local Control Switch Positions and Label Settings ......7-6 Table 7.2: Correspondence Between Local Control Switch Types and Required Label Settings ...7-7 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 323 Figure 7.27: Traditional Panel Light Installations...................7-35 Figure 7.28: Rotating Default Display Replaces Traditional Panel Light Installations ......7-36 Figure 7.29: Trip and Close Circuit, Breaker Status, and SF6 Gas Pressure Connections ..... 7-43 Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic SEL-351P Manual Técnico...

  • Page 325: Section 7: Inputs, Outputs, Timers, And Other

    Relay Word bits and SEL Control Equation setting examples are used throughout this OGIC section. See Section 9: Setting the SEL-351P Recloser Control for more information on Relay Word bits and SEL Control Equation settings. See Section 10: Serial Port...

  • Page 326: Input Debounce Timers

    Time settings IN101D through IN106D are settable from 0.00 to 1.00 cycles. The SEL-351P takes the entered time setting and internally runs the timer at the nearest 1/16-cycle. For example, if setting IN5D = 0.80, internally the timer runs at the nearest 1/16-cycle: 13/16-cycles...

  • Page 327: Input Functions

    If a 52b circuit breaker auxiliary contact is connected to input IN101, the setting is changed to: 52A = !IN101 [!IN101 = NOT(IN101)] See Close Logic in Section 6: Close and Reclose Logic for more information on SEL OGIC Control Equation setting 52A. Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic SEL-351P Manual Técnico...
  • Page 328 79DTL = !IN102 + ... = NOT(IN102) + ... = NOT(logical 1) +... = logical 0 + ... See Section 6: Close and Reclose Logic for more information on SEL Control Equation OGIC setting 79DTL. Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 329 Operate the eight (8) local control switches using the front-panel keyboard/display (see Section 11: Additional Front-Panel Interface Details). This extra local control is not the control available via the operator control pushbuttons on the bottom half of the SEL-351P front panel.

  • Page 330: Local Control Switch Types

    Note the first setting in Table SECTION 7: .1 (NLBn) is the overall switch name setting. Make each label setting through the serial port using the command SET T. View these settings using the serial port command SHO T (see Section 9: Setting the SEL-351P Recloser Control and Section 10: Serial Port Communications and Commands).

  • Page 331: On/Off/Momentary Switch

    Table SECTION 7: .2: Correspondence Between Local Control Switch Types and Required Label Settings Label Local Switch Type Label NLBn Label CLBn Label SLBn PLBn ON/OFF OFF/MOMENTARY Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic SEL-351P Manual Técnico...

  • Page 332: Settings Examples

    ON/OFF/MOMENTARY Disable local control switches by “nulling out” all the label settings for that switch (see Section 9: Setting the SEL-351P Recloser Control). The local bit associated with this disabled local control switch is then fixed at logical 0. Settings Examples...

  • Page 333: Additional Local Control Switch Application Ideas

    OFF position (corresponding local bit is deasserted to logical 0) when power is lost, it comes back in the OFF position (corresponding local bit is still deasserted to logical 0) when power is Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic SEL-351P Manual Técnico...

  • Page 334: Settings Change Or Active Setting Group Change

    Remote control switches are operated via the serial communications port only (see CON Command (Control Remote Bit) in Section 10: Serial Port Communications and Commands). Figure SECTION 7: .9: Remote Control Switches Drive Remote Bits RB1 Through 7-10 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 335: Remote Bit Application Ideas

    (see Figure SECTION 7: .10). Pulse the set input to close (“set”) the latching relay output contact. Pulse the reset input to open (“reset”) the latching relay output contact. Often Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-11 SEL-351P Manual Técnico...

  • Page 336: Latch Control Switch Application Ideas

    SCADA, RTU). Figure SECTION 7: .10: Traditional Latching Relay The eight latch control switches in the SEL-351P provide latching relay type functions. Figure SECTION 7: .11: Latch Control Switches Drive Latch Bits LT1 Through LT8 The output of the latch control switch in Figure SECTION 7: .11 is a Relay Word bit LTn (n = 1 through 8), called a latch bit.

  • Page 337: Reclosing Relay Enable/Disable Setting Example

    Latch control switches can be applied to almost any control scheme. The following is an example of using a latch control switch to enable/disable the reclosing relay in the SEL-351P. Reclosing Relay Enable/Disable Setting Example Use a latch control switch to enable/disable the reclosing relay in the SEL-351P. In this example, a SCADA contact is connected to optoisolated input IN104.

  • Page 338: Feedback Control

    With latch bit LT1 now at logical 1 for the next processing interval, input IN104 is routed to setting RST1 (as discussed previously): RST1 = /IN104 = rising edge of input IN104 7-14 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 339: Use A Remote Bit Instead To Enable/Disable The Reclosing Relay

    Use a remote bit to enable/disable the reclosing relay, instead of an optoisolated input. For example, substitute remote bit RB1 for optoisolated input IN104 in the settings accompanying Figure SECTION 7: .13: Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-15 SEL-351P Manual Técnico...

  • Page 340: Latch Control Switch States Retained

    For example, when setting Group 4 becomes the active setting group, latch bit LT2 should be reset. Make the following SEL Control Equation settings in setting Group 4: OGIC SV7 = SG4 RST2 = !SV7T + ... [= NOT(SV7T) + ...] 7-16 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 341: Note: Make Latch Control Switch Settings With Care

    LT1 to change state continuously. Note that the rising edge operators in the SET1 and RST1 settings keep latch bit LT1 from cyclically operating for any single assertion of the SCADA contact. Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-17 SEL-351P Manual Técnico...
  • Page 342 Latch Control Switch (with Time Delay Feedback) Controlled by a Single Input to Enable/Disable Reclosing Figure SECTION 7: .17: Latch Control Switch (with Time Delay Feedback) Operation Time Line 7-18 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 343: Multiple Setting Groups

    Control Equation settings SS1 through SS6 have priority over the serial port GROUP OGIC command and the front-panel GROUP pushbutton in selecting the active setting group. Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-19 SEL-351P Manual Técnico...

  • Page 344: Operation Of Serial Port Group Command And Front-Panel Group Pushbutton

    See Section 10: Serial Port Communications and Commands for more information on the serial port GROUP command. See Section 11: Additional Front-Panel Interface Details for more information on the front-panel GROUP pushbutton. 7-20 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 345: Sel-351P Disabled Momentarily During Active Setting Group Change

    SEL-351P Disabled Momentarily During Active Setting Group Change The SEL-351P is disabled for a few seconds while the it is in the process of changing active setting groups. SEL-351P elements, timers, and logic are reset, unless indicated otherwise in specific logic description [e.g., local bit (LB1 through LB8) and latch bit (LT1 through LT8) states are retained during a active setting group change].
  • Page 346 (Figure SECTION 7: .18). This allows only one active setting group change (e.g., from setting Group 1 to 4) for each pulse of the SCADA contact (and subsequent assertion of input IN105). 7-22 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 347: Start Out In Setting Group 1

    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 SECTION 7: .1). Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-23 SEL-351P Manual Técnico...
  • Page 348 Group 4 Group 5 Group 6 The SEL-351P can be programmed to operate similarly. Use three optoisolated inputs to switch between the six setting groups in the SEL-351P. In this example, optoisolated inputs IN101, 7-24 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 349 The settings in Table SECTION 7: .7 are made in each setting Group 1 through 6. Selector Switch Starts Out in Position 3 Refer to Table SECTION 7: .7 and Figure SECTION 7: .22. Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-25 SEL-351P Manual Técnico...

  • Page 350: Selector Switch Switched To Position 5

    With settings SS1 through SS6 all at logical 0, the serial port GROUP command or the front- panel GROUP pushbutton can be used to switch the active setting group from Group 5, in this example, to another desired setting group. 7-26 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 351: Active Setting Group Retained

    If individual settings are changed for a setting group other than the active setting group, there is no interruption of the active setting group (the relay is not momentarily disabled). Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-27 SEL-351P Manual Técnico...
  • Page 352 0.00 - 16000.00 cycles in 0.25-cycle increments These timer setting ranges apply to both pickup and dropout times (SVnPU and SVnDO, n = 1 through 16). 7-28 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...
  • Page 353 Figure SECTION 7: .23: Control Equation Variables/Timers SV1/SV1T OGIC Through SV6/SV6T Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-29 SEL-351P Manual Técnico...

  • Page 354: Settings Example 1

    Control Equation setting SV7 being set OGIC equal to Relay Word bit SV7 (SEL Control Equation variable SV7): OGIC SV7 = (SV7 + IN101) * (50P1 + 50N1) 7-30 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 355: Settings Example 3

    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. Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-31 SEL-351P Manual Técnico...

  • Page 356: Output Contacts

    Figure SECTION 7: .26. An “a” type output contact is open when the output contact coil is deenergized and closed when the 7-32 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 357: Alarm Output Contact

    (energized or deenergized) and output contact types (a or b) are demonstrated. See Output Contact Jumpers in Section 2: Additional Installation Details for output contact type options. Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-33 SEL-351P Manual Técnico...

  • Page 358: Rotating Default Display

    SCADA contacts, etc. They indicate such conditions as: circuit breaker open/closed reclosing relay enabled/disabled 7-34 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 359: Traditional Indicating Panel Lights

    Traditional Indicating Panel Lights Replaced with Rotating Default Display The indicating panel lights are not needed if the rotating default display feature in the SEL-351P is used. Figure SECTION 7: .28 shows the elimination of the indicating panel lights by using the rotating default display.

  • Page 360: General Operation Of Rotating Default Display Settings

    Rotating Default Display Replaces Traditional Panel Light Installations There are eight (8) of these default displays available in the SEL-351P. Each default display has two complementary screens (e.g., BREAKER CLOSED and BREAKER OPEN) available. General Operation of Rotating Default Display Settings...

  • Page 361: Reclosing Relay Enabled

    In Figure SECTION 7: .28, optoisolated input IN101 is energized when the 52a circuit breaker auxiliary contact is closed, resulting in: DP2 = IN101 = logical 1 Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-37 SEL-351P Manual Técnico...

  • Page 362: Circuit Breaker Open

    In Figure SECTION 7: .28, optoisolated input IN101 is deenergized when the 52a circuit breaker auxiliary contact is open, resulting in: DP2 = IN101 = logical 0 7-38 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 363: Continually Display A Message

    0 (logical 0) or 1 (logical 1) and the corresponding text setting. For example, if an SEL-351P is protecting a 12 kV distribution feeder, labeled “Feeder 1204,” the feeder name can be continually displayed with the following settings...

  • Page 364: Reclosing Relay Enabled

    Text settings (remain the same for all setting groups): DP1_1 = 79 ENABLED (displayed when DP1 = logical 1) DP1_0 = 79 DISABLED (displayed when DP1 = logical 0) 7-40 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215 SEL-351P Manual Técnico...

  • Page 365: Additional Rotating Default Display Example

    REAKER TATUS RESSURE Figure SECTION 7: .29 is similar to Figure 4 in the Installation section in the SEL-351P Quick-Start Installation and User’s Guide, with additional Relay Word bit detail: RAW52B 52b breaker auxiliary status – not time-qualified; RAW52B = logical 1 when...
  • Page 366 (see subsection STA Command in Section 10: Serial Port Communications and Commands). Pressure sensing in the SEL-351P has a 5 minute time constant with a 95% response. For example, if the SF6 gas pressure is suddenly lost (recloser tank pressure goes from 1.30 atm to atmospheric pressure, 1.00 atm), after 5 minutes the SEL-351P reports the SF6 gas pressure at...
  • Page 367 (Bussman GMD-0.125 fuse SF6LO or equivalent). (low pressure) setting DWG: M351P024 SF6PRS Figure SECTION 7: .29: Trip and Close Circuit, Breaker Status, and SF6 Gas Pressure Connections Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-43 SEL-351P Manual Técnico...
  • Page 369 Additional Example ....................8-13 Battery System Monitor......................8-14 Battery System Operation ....................8-15 SEL-351P Puts Itself “To Sleep” ................8-15 Keep 12 Vdc on While SEL-351P is “Asleep”............8-16 “Wake Up” the SEL-351P...................8-16 Battery System Diagnostics ....................8-16 Automatic Battery Load Test ..................8-17 Battery Load Test via Front Panel ................8-17 Battery Load Test via Serial Port................8-18...
  • Page 370 Table 8.5: Demand Meter Settings and Settings Range .................8-25 FIGURES Figure 8.1: Plotted Breaker Maintenance Points for a 25 kV Circuit Breaker..........8-5 Figure 8.2: SEL-351P Recloser Control Breaker Maintenance Curve for a 25 kV Circuit Breaker..8-7 Figure 8.3: Operation of SEL Control Equation Breaker Monitor Initiation Setting......8-8 OGIC Figure 8.4: Breaker Monitor Accumulates 10% Wear ................8-10...

  • Page 371: Section 8: Breaker/Recloser Monitor, Battery

    The SEL-351P updates and stores the contact wear information, and the number of trip operations, in non-volatile memory. You can view this information through the front-panel display and by communicating with the SEL-351P through any serial communication port with a computer.
  • Page 372 GVR (15 kV, 6 kA) 6000 GVR (15 kV, 12 kA) 12000 GVR (27 kV, 12 kA) 12000 GVR (38 kV, 8 kA) 8000 Breaker/Recloser Monitor, Battery System Monitor, Date Code 990430 Metering, and Load Profile Functions SEL-351P Manual Técnico...
  • Page 373 = AUTO is made, as described previously. For example, if the SEL-351P is connected to a GVR (27kV, 12 kA) recloser, use the SET FZ command to enter and save the following Access Level E (EZ) global settings for the contact wear monitor: •...

  • Page 374: Breaker Monitor Setting Example

    Breaker Monitor Setting Example If your recloser is not included in Table SECTION 8: .2, or you adapt the SEL-351P to operate a breaker, you can create a contact wear monitor curve for your specific breaker or recloser. The breaker/recloser contact wear monitor is set with breaker or recloser maintenance information provided by circuit breaker and recloser manufacturers.
  • Page 375 Figure SECTION 8: .1: Plotted Breaker Maintenance Points for a 25 kV Circuit Breaker Date Code 990430 Breaker/Recloser Monitor, Battery System Monitor, Metering, and Load Profile Functions SEL-351P Manual Técnico...

  • Page 376: Breaker Maintenance Curve Details

    First, use the SET FZ (global EZ settings) command in Access Level E (EZ) or Access Level 2 to make setting Recloser Wear Monitor (AUTO, Y, N) = Y. Then, in Access Level 2, use the SET G (global settings) command to make the following SEL-351P contact wear monitor settings: COSP1 = 10000...
  • Page 377 Figure SECTION 8: .2: SEL-351P Recloser Control Breaker Maintenance Curve for a 25 kV Circuit Breaker Date Code 990430 Breaker/Recloser Monitor, Battery System Monitor, Metering, and Load Profile Functions SEL-351P Manual Técnico...

  • Page 378: Operation Of Sel Ogic ® Control Equation Breaker Monitor Initiation Setting Bkmon

    See following subsection Determination of Control Initiated Trips and Externally Initiated Trips for more information on the other part of the factory setting (. . . + WBTRT + \52A). Breaker/Recloser Monitor, Battery System Monitor, Date Code 990430 Metering, and Load Profile Functions SEL-351P Manual Técnico...

  • Page 379: Breaker Monitor Operation Example

    Compare the 100% and 50% curves and note that for a given current value, the 50% curve has only 1/2 of the close/open operations of the 100% curve. Date Code 990430 Breaker/Recloser Monitor, Battery System Monitor, Metering, and Load Profile Functions SEL-351P Manual Técnico...
  • Page 380 Monitor Accumulates 25% Wear Wear Figure SECTION 8: .6: Breaker Figure SECTION 8: .7: Breaker Monitor Accumulates 50% Monitor Accumulates Wear 100% Wear 8-10 Breaker/Recloser Monitor, Battery System Monitor, Date Code 990430 Metering, and Load Profile Functions SEL-351P Manual Técnico...

  • Page 381: 50% To 100% Breaker Wear

    Commands. The BRE A command displays the following information: • Accumulated number of recloser control initiated trips • Accumulated interrupted current from recloser control initiated trips Date Code 990430 Breaker/Recloser Monitor, Battery System Monitor, 8-11 Metering, and Load Profile Functions SEL-351P Manual Técnico...

  • Page 382: Via Front Panel

    BRE A and BRE R are also available via the front-panel OTHER pushbutton. See the OTHER pushbutton in the Pushbutton Primary Functions subsection in the Front-Panel Interface section of the SEL-351P Quick-Start Installation and User’s Guide. Determination of Control Initiated Trips and Externally Initiated Trips See BRE Command (Breaker Monitor Data) in Section 10: Serial Port Communications and Commands.

  • Page 383: Factory Default Setting Example

    Note that optoisolated input IN102 monitors the trip bus. If the trip bus is energized by output contact OUT101, an external control switch, or some other external trip, then IN102 is asserted. Date Code 990430 Breaker/Recloser Monitor, Battery System Monitor, 8-13 Metering, and Load Profile Functions SEL-351P Manual Técnico...

  • Page 384: Battery System Monitor

    SEL-351P does when the battery system is OK or when it detects a problem. See the Battery section in the SEL-351P Quick-Start Installation and User’s Guide.

  • Page 385: Battery System Operation

    Or the temperature-compensated battery voltage falls below 80% Ten minutes before the SEL-351P puts itself to sleep, the TOSLP Relay Word bit asserts and remains asserted until the SEL-351P goes to sleep. This bit can be used to trigger a row in the Date Code 990430...

  • Page 386: Keep 12 Vdc On While Sel-351P Is "Asleep

    70%, the SEL-351P puts itself to sleep immediately, regardless of any other conditions. Keep 12 Vdc on While SEL-351P is “Asleep” If both the following conditions are true when the SEL-351P puts itself to sleep, due to having reached the % Battery capacity for sleep setting (e.g., 20% capacity): •...

  • Page 387: Automatic Battery Load Test

    351P maintains a low-rate charging current, so it is still in the charge mode. After the 24-hour timer runs out and the SEL-351P is still in the charge mode, a 1-A load is automatically paralleled with the battery for 5 seconds. If battery voltage drops below 80% nominal (temperature-compensated voltage level) during this load test, the BATTERY PROBLEM LED illuminates and stays illuminated until the next battery test is successful.

  • Page 388: Battery Load Test Via Serial Port

    You can initiate a battery load test via the serial communication port by sending the BTT NOW command. The SEL-351P responds with one of the following results: 1. If the battery monitor/charger has a problem, the following message is displayed: Battery Charger Board FAILED The BATTERY PROBLEM LED already would be illuminated for this condition.

  • Page 389: Battery Status

    Battery monitor/charger failure (Relay Word bit BCBOK = logical 0) You also can press the STATUS pushbutton on the front panel of the SEL-351P to access more battery status information. Use the secondary function up/down arrow pushbuttons to move to different status screens.

  • Page 390: Metering

    Phase A, Phase 3-4 to primary Phase B, and Phase 5-6 to primary Phase C. If this is not the case, you will need to modify the SEL-351P terminal strip connections to obtain the proper phase and phase polarity.

  • Page 391: Demand Metering

    Demand Metering The SEL-351P factory default settings enable the control to provide Thermal Demand Metering. The SEL-351P offers the choice between two types of demand metering, set with the Access Level 2 enable setting: EDEM = THM (Thermal Demand Meter) EDEM = ROL (Rolling Demand Meter) The demand metering settings in Table SECTION 8: .5 are available via the Access Level 2 SET...

  • Page 392: Thermal Demand Meter Response (Edem = Thm)

    The response of the thermal demand meter in Figure SECTION 8: .9 (middle) to the step current input (top) is analogous to the series RC circuit in Figure SECTION 8: .10. 8-22 Breaker/Recloser Monitor, Battery System Monitor, Date Code 990215 Metering, and Load Profile Functions SEL-351P Manual Técnico...

  • Page 393: Rolling Demand Meter Response (Edem = Rol)

    (1.0 per unit) after a time period equal to setting DMTC = 15 minutes, referenced to when the step current input is first applied. The SEL-351P updates thermal demand values approximately every 2 seconds. The factory default Access Level 2 Demand Meter Time Constant setting is DMTC = 5 minutes.

  • Page 394: Time = 0 Minutes

    1.0 per unit 0 to 5 minutes 1.0 per unit Rolling demand meter response at “Time = 5 minutes” = 1.0/3 = 0.33 per unit 8-24 Breaker/Recloser Monitor, Battery System Monitor, Date Code 990215 Metering, and Load Profile Functions SEL-351P Manual Técnico...

  • Page 395: Time = 10 Minutes

    Note: Changing setting EDEM or DMTC resets the demand meter values to zero. This also applies to changing the active setting group, and setting EDEM or DMTC is different in Date Code 990215 Breaker/Recloser Monitor, Battery System Monitor, 8-25 Metering, and Load Profile Functions SEL-351P Manual Técnico...
  • Page 396 QDEM) to alarm for high loading or unbalance conditions. Use in other schemes such as the following example. Figure SECTION 8: .11: Demand Current Logic Outputs 8-26 Breaker/Recloser Monitor, Battery System Monitor, Date Code 990215 Metering, and Load Profile Functions SEL-351P Manual Técnico...

  • Page 397: Demand Current Logic Output Application - Raise Pickup For Unbalance Current

    Refer to Figure SECTION 8: .11, Figure SECTION 8: .12, and Figure 3.19. Figure SECTION 8: .12: Raise Pickup of Residual Ground Time-Overcurrent Element for Unbalance Current Date Code 990215 Breaker/Recloser Monitor, Battery System Monitor, 8-27 Metering, and Load Profile Functions SEL-351P Manual Técnico...

  • Page 398: Residual Ground Demand Current Below Pickup Gdemp

    NOT(logical 0) + (logical 0) * 50G5 = logical 1 Thus, the residual ground time-overcurrent element 51G1T operates on its standard pickup again: 51G1P = 1.50 A secondary 8-28 Breaker/Recloser Monitor, Battery System Monitor, Date Code 990215 Metering, and Load Profile Functions SEL-351P Manual Técnico...

  • Page 399: View Or Reset Demand Metering Information

    MET D, MET RD, and MET RP are also available via the front-panel METER pushbutton. See the METER pushbutton in the Pushbutton Primary Functions subsection in the Front-Panel Interface section of the SEL-351P Quick-Start Installation and User’s Guide. Demand Metering Updating and Storage The SEL-351P updates demand values approximately every 2 seconds.

  • Page 400: Via Front Panel

    MET M and MET RM are also available via the front-panel METER pushbutton. See the METER pushbutton in the Pushbutton Primary Functions subsection in the Front-Panel Interface section of the SEL-351P Quick-Start Installation and User’s Guide. 8-30 Breaker/Recloser Monitor, Battery System Monitor,...

  • Page 401: Maximum/Minimum Metering Updating And Storage

    • Megawatt and megavar values are subject to the above voltage and current thresholds. The SEL-351P stores maximum/minimum values to nonvolatile memory once per day (it overwrites the previous stored value if it is exceeded). Should the control completely lose control power or go into the “sleep”...

  • Page 402: Load Profile Report (Only Available In Firmware Versions 1 And Greater)

    When the buffer fills up, newer records overwrite older records. The 040 data FLASH version of the SEL-351P is able to store at least 13 days of data at an LDAR of 5 minutes, if all 15 values are used. If less than 15 values are specified, the SEL-351P will be able to store more days of data before data overwrite occurs.
  • Page 403 (top) of the report and the latest row (date 3/23/97) at the end (bottom) of the report. Chronological progression through the report is down the page and in descending row number. Date Code 990215 Breaker/Recloser Monitor, Battery System Monitor, 8-33 Metering, and Load Profile Functions SEL-351P Manual Técnico...

  • Page 404: Determining The Size Of The Load Profile Buffer

    If the requested load profile report rows do not exist, the relay responds: No Load Profile Data Determining the Size of the Load Profile Buffer The LDP D command displays maximum number of days of data the SEL-351P may acquire with the present settings, before data overwrite will occur. =>LDP D <ENTER>...
  • Page 405 Table 9.1: Serial Port SET Commands.....................9-1 Table 9.2: Set Command Editing Keystrokes...................9-2 Table 9.3: SEL-351P Recloser Control Relay Word Bits ..............9-19 Table 9.4: Relay Word Bit Definitions for SEL-351P Recloser Control ..........9-20 FIGURES Figure 9.1: U.S. Moderately Inverse Curve: U1..................9-5 Figure 9.2: U.S.
  • Page 407 Automatic recloser monitor, battery monitor, etc. * located at end of this section ** located at the end of the Settings section in the SEL-351P Quick-Start Installation and User’s Guide. View settings with the respective serial port SHOWSET commands (SHO, SHO L, SHO G, SHO R, SHO T, SHO P, SHO EZ, SHO FZ).
  • Page 408 TERSE option. When you issue the SET command, the SEL-351P presents a list of settings, one at a time. Enter a new setting, or press <ENTER> to accept the existing setting. Editing keystrokes are shown in Table SECTION 9: .2.
  • Page 409 The SEL-351P checks each entry to ensure that it is within the setting range. If it is not, an “Out of Range” message is generated, and the control prompts for the setting again. When all the settings are entered, the control displays the new settings and prompts for approval to enable them.
  • Page 410 Newer microprocessor-based control designation Use either designation in making curve settings in the SEL-351P. See Table 8 and Table 9 and following text in the Settings section of the SEL-351P Quick-Start Installation and User’s Guide for more information on available time-overcurrent curves, including user-programmable curves.
  • Page 411 Figure SECTION 9: .2: U.S. Inverse Inverse Curve: U1 Curve: U2 Figure SECTION 9: .3: U.S. Very Inverse Figure SECTION 9: .4: U.S. Extremely Curve: U3 Inverse Curve: U4 Date Code 990430 Setting the SEL-351P Recloser Control SEL-351P Manual Técnico...
  • Page 412 Figure SECTION 9: .5: U.S. Short-Time Inverse Curve: U5 Figure SECTION 9: .6: I.E.C. Class A Curve Figure SECTION 9: .7: I.E.C. Class B (Standard Inverse): C1 Curve (Very Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 413 Inverse): C2 Figure SECTION 9: .8: I.E.C. Class C Curve Figure SECTION 9: .9: I.E.C. Long-Time (Extremely Inverse): C3 Inverse Curve: C4 Date Code 990430 Setting the SEL-351P Recloser Control SEL-351P Manual Técnico...
  • Page 414 6 (5) 0.20 3 (2.5) 0.10 0.05 DWG. M300G153 .5 .6 .7 .8.9 5 6 7 8 9 Multiples of Pickup Figure SECTION 9: .10: I.E.C. Short-Time Inverse Curve: C5 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 415 Figure 9.11: Recloser Control Response Curves A, C, N, and W Date Code 990430 Setting the SEL-351P Recloser Control SEL-351P Manual Técnico...
  • Page 416 Figure 9.12: Recloser Control Response Curves B, R, 2, and 3 9-10 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 417 Figure 9.13: Recloser Control Response Curves D, 8PLUS, and 16 Date Code 990430 Setting the SEL-351P Recloser Control 9-11 SEL-351P Manual Técnico...
  • Page 418 Figure 9.14: Recloser Control Response Curves F, H, J, and 1 9-12 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 419 Figure 9.15: Recloser Control Response Curves G, V, 6, and 13 Date Code 990430 Setting the SEL-351P Recloser Control 9-13 SEL-351P Manual Técnico...
  • Page 420 Figure 9.16: Recloser Control Response Curves E, P, and 18 9-14 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 421 Figure 9.17: Recloser Control Response Curves KG, Y, Z, and 5 Date Code 990430 Setting the SEL-351P Recloser Control 9-15 SEL-351P Manual Técnico...
  • Page 422 Figure 9.18: Recloser Control Response Curves KP, M, T, and 17 9-16 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 423 Figure 9.19: Recloser Control Response Curves 4, 9, 11, and 14 Date Code 990430 Setting the SEL-351P Recloser Control 9-17 SEL-351P Manual Técnico...
  • Page 424 Figure 9.20: Recloser Control Response Curves L, 7, 8, and 15 9-18 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 425 TAR Command (Target) in Section 10: Serial Port Communications and Commands]. Rows 0 and 1 are reserved for the display of the two front-panel target LED rows. Table SECTION 9: .3: SEL-351P Recloser Control Relay Word Bits Relay Word Bits...
  • Page 426 WBCL WBTR CLCAP TRCAP 1. M ™ elements only valid in firmware versions 1 or greater. IRRORED Table SECTION 9: .4: Relay Word Bit Definitions for SEL-351P Recloser Control Primary Definition Application 50A1 Level 1 A-phase instantaneous overcurrent element Tripping, (A-phase current above pickup setting 50P1P;...
  • Page 427 Level 1 CA-phase-to-phase instantaneous overcurrent element (CA-phase-to-phase current above pickup setting 50PP1P; see Figure 3.7) 50AB2 Level 2 AB-phase-to-phase instantaneous overcurrent element (AB-phase-to-phase current above pickup setting 50PP2P; see Figure 3.7) Date Code 990430 Setting the SEL-351P Recloser Control 9-21 SEL-351P Manual Técnico...
  • Page 428 Neutral ground current (channel IN) above pickup Testing, Control setting 51N1P for neutral ground time-overcurrent element 51N1T (see Figure 3.16) 51N1T Neutral ground time-overcurrent element 51N1T Tripping timed out (see Figure 3.16) 9-22 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 429 51QP for negative-sequence time-overcurrent element 51QT (see Figure 3.20) 51QT** Negative-sequence time-overcurrent element 51QT Tripping timed out (see Figure 3.20) 51QR Negative-sequence time-overcurrent element 51QT Testing reset (see Figure 3.20) Date Code 990430 Setting the SEL-351P Recloser Control 9-23 SEL-351P Manual Técnico...
  • Page 430 Level 4 neutral ground instantaneous overcurrent element (derived from 50N4; see Figure 3.8) 67P1T Level 1 phase definite-time overcurrent element Tripping 67P1T timed out (derived from 67P1; see Figure 3.3) 9-24 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 431 Level 2 negative-sequence instantaneous overcurrent element (negative-sequence current above pickup setting 50Q2P; see Figure 3.12) 50Q3** Level 3 negative-sequence instantaneous overcurrent element (negative-sequence current above pickup setting 50Q3P; see Figure 3.12) Date Code 990430 Setting the SEL-351P Recloser Control 9-25 SEL-351P Manual Técnico...
  • Page 432 Level 1 negative-sequence definite-time overcurrent element 67Q1T timed out (derived from 67Q1; see Figure 3.12) 67Q2T** Level 2 negative-sequence definite-time overcurrent element 67Q2T timed out (derived from 67Q2; see Figure 3.12) 9-26 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 433 50GF Forward direction residual ground overcurrent threshold exceeded (see Figures 4.4, 4.6, and 4.10) 50GR Reverse direction residual ground overcurrent threshold exceeded (see Figures 4.4, 4.6, and 4.10) Date Code 990430 Setting the SEL-351P Recloser Control 9-27 SEL-351P Manual Técnico...
  • Page 434 R32N Reverse zero-sequence voltage-polarized, neutral current directional element (see Figures 4.4, 4.11, and 4.13) 32PF Forward directional control routed to phase overcurrent elements (see Figures 4.19 and 4.21) 9-28 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 435 59C1 C-phase instantaneous overvoltage element (C-phase voltage above pickup setting 59P1P; see Figure 3.21) 59A2 A-phase instantaneous overvoltage element (A-phase voltage above pickup setting 59P2P; see Figure 3.21) Date Code 990430 Setting the SEL-351P Recloser Control 9-29 SEL-351P Manual Técnico...
  • Page 436 Channel VS instantaneous undervoltage element (channel VS voltage below pickup setting 27SP; see Figure 3.23) 59S1 Channel VS instantaneous overvoltage element (channel VS voltage above pickup setting 59S1P; see Figure 3.23) 9-30 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 437 (any phase voltage below pickup setting 27B81P; see Figure 3.27) Phase instantaneous overcurrent element for load detection (maximum phase current above pickup setting 50LP; see Figure 5.3) Date Code 990430 Setting the SEL-351P Recloser Control 9-31 SEL-351P Manual Técnico...
  • Page 438 Optoisolated input IN104 asserted (see Figure 7.1) inputs IN103 Optoisolated input IN103 asserted (see Figure 7.1) IN102 Optoisolated input IN102 asserted (see Figure 7.1) IN101 Optoisolated input IN101 asserted (see Figure 7.1) 9-32 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 439 Control Equation variable timer input SV2 OGIC asserted (see Figure 7.23) Control Equation variable timer input SV3 OGIC asserted (see Figure 7.23) Control Equation variable timer input SV4 OGIC asserted (see Figure 7.23) Date Code 990430 Setting the SEL-351P Recloser Control 9-33 SEL-351P Manual Técnico...
  • Page 440 SV10T asserted (see Figure 7.24) SV11T Control Equation variable timer output OGIC SV11T asserted (see Figure 7.24) SV12T Control Equation variable timer output OGIC SV12T asserted (see Figure 7.24) 9-34 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 441 Open interval timer is timing (see Reclosing Relay in Testing Section 6: Close and Reclose Logic) RSTMN Reset timer is timing (see Reclosing Relay in Section 6: Close and Reclose Logic) Date Code 990430 Setting the SEL-351P Recloser Control 9-35 SEL-351P Manual Técnico...
  • Page 442 Load enchroachment “load out” element (see Special phase ZLIN Figure 4.2) overcurrent element control Load enchroachment “load in” element (see Figure 4.2) ZLOAD ZLOUT + ZLIN (see Figure 4.2) 9-36 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 443 Echo key (see Figure 5.6) Testing ECTT Echo conversion to trip condition (see Figure 5.6) Weak infeed condition (see Figure 5.6) Permissive trip signal to POTT logic (see Figure 5.5) Date Code 990430 Setting the SEL-351P Recloser Control 9-37 SEL-351P Manual Técnico...
  • Page 444 (derived from 67N2; see Figures 3.8 and 5.14) 67G2S Level 2 directional residual ground definite-time (short delay) overcurrent element 67G2S timed out (derived from 67G2; see Figures 3.10 and 5.14) 9-38 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 445 LED9 Recloser Open LED (see Figure 1.36) LED1 Ground Enabled LED (see Figure 1.35) LED2 Reclose Enabled LED (see Figure 1.35) LED3 Remote Enabled LED (see Figure 1.35) Date Code 990430 Setting the SEL-351P Recloser Control 9-39 SEL-351P Manual Técnico...
  • Page 446 Figure 1.4) SEQC Sequence coordination enabled (see Figure 1.27) 3PHV Three phase voltage hooked up to control (see Figure 4.1) Ground trip precedence enabled (see Figure 1.24) 9-40 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 447 Channel B, transmit bit 8 TMB7B Channel B, transmit bit 7 TMB6B Channel B, transmit bit 6 TMB5B Channel B, transmit bit 5 TMB4B Channel B, transmit bit 4 Date Code 990430 Setting the SEL-351P Recloser Control 9-41 SEL-351P Manual Técnico...
  • Page 448 Trip capacitor charged higher than 80 Vdc (see Tripping, Figure 7.29) Closing, Control ** IMPORTANT: See Appendix F: Setting Negative-Sequence Overcurrent Elements for special instructions on setting negative-sequence overcurrent elements. 9-42 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 449 Typical Terminal Identifiers include an abbreviation of the substation name and line terminal. The SEL-351P tags each report (event report, meter report, etc.) with the Relay Identifier and Terminal Identifier. This allows you to distinguish the report as one generated for a specific breaker and substation.
  • Page 450 The settings sheets that follow include the definition and input range for most of the settings in the SEL-351P. The settings sheets for the EZ settings are located at the end of the Settings section in the SEL-351P Quick-Start Installation and User’s Guide. See Table 9.1 for settings sheets references.
  • Page 451 Figure 9.12: Recloser Control Response Curves B, R, 2, and 3 Date Code 990430 Setting the SEL-351P Recloser Control SEL-351P Manual Técnico...
  • Page 452 Figure 9.13: Recloser Control Response Curves D, 8PLUS, and 16 9-10 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 453 Figure 9.14: Recloser Control Response Curves F, H, J, and 1 Date Code 990430 Setting the SEL-351P Recloser Control 9-11 SEL-351P Manual Técnico...
  • Page 454 Figure 9.15: Recloser Control Response Curves G, V, 6, and 13 9-12 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 455 Figure 9.16: Recloser Control Response Curves E, P, and 18 Date Code 990430 Setting the SEL-351P Recloser Control 9-13 SEL-351P Manual Técnico...
  • Page 456 Figure 9.17: Recloser Control Response Curves KG, Y, Z, and 5 9-14 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 457 Figure 9.18: Recloser Control Response Curves KP, M, T, and 17 Date Code 990430 Setting the SEL-351P Recloser Control 9-15 SEL-351P Manual Técnico...
  • Page 458 Figure 9.19: Recloser Control Response Curves 4, 9, 11, and 14 9-16 Setting the SEL-351P Recloser Control Date Code 990430 SEL-351P Manual Técnico...
  • Page 459 ETTINGS HEET Page 1 of 23 SEL-351P R OR THE ECLOSER ONTROL Date ROUP ETTINGS ERIAL OMMAND RONT ANEL Identifier Labels (see Settings Explanations in Section 9) Relay Identifier (30 characters) RID = Terminal Identifier (30 characters) TID = Current and Potential Transformer Ratios (see Settings Explanations in Section 9) Phase (IA, IB, IC) Current Transformer Ratio (1.0-6000.0)
  • Page 460 ETTINGS HEET Page 2 of 23 SEL-351P R OR THE ECLOSER ONTROL Date ROUP ETTINGS ERIAL OMMAND RONT ANEL Synchronism check (Y, N) (see Figures 3.24 and 3.25) E25 = Fault location (Y, N) (see Table 12.1 and Fault Location in Section 12) EFLOC = Loss-of-potential (Y, N) (see Figure 4.1)
  • Page 461 ETTINGS HEET Page 3 of 23 SEL-351P R OR THE ECLOSER ONTROL Date ROUP ETTINGS ERIAL OMMAND RONT ANEL Neutral Ground Inst./Def.-Time Overcurrent Elements – Channel IN (see Figures 3.8 and 3.9) (Number of neutral ground element pickup settings dependent on preceding enable setting E50N = 1-6) Pickup (OFF, 0.005-1.500A)
  • Page 462 ETTINGS HEET Page 4 of 23 SEL-351P R OR THE ECLOSER ONTROL Date ROUP ETTINGS ERIAL OMMAND RONT ANEL Negative-Sequence Inst./Def.-Time Overcurrent Elements (see Figures 3.12 and 3.13)* (Number of negative-sequence element time delay settings dependent on preceding enable setting E50Q = 1-6) Pickup (OFF, 0.05-20.00 A)
  • Page 463 ETTINGS HEET Page 5 of 23 SEL-351P R OR THE ECLOSER ONTROL Date ROUP ETTINGS ERIAL OMMAND RONT ANEL Electromechanical Reset (Y,N; applicable only to curves U1-U5, C1-C5) 51P2RS = Constant time adder (0.00-60.00 cyc.) 51P2CT = Minimum response (0.00-60.00 cyc.) 51P2MR = Neutral Ground Time-Overcurrent Elements - Channel IN (see Figure 3.16 and 3.17)
  • Page 464 ETTINGS HEET Page 6 of 23 SEL-351P R OR THE ECLOSER ONTROL Date ROUP ETTINGS ERIAL OMMAND RONT ANEL Time-Dial (0.50-15.00 for curves U1-U5, 0.05-1.00 for curves C1-C5, 0.10-2.00 for recloser and user curves) 51G2TD = Electromechanical Reset (Y,N; applicable only to curves U1-U5, C1-C5) 51G2RS = Constant time adder (0.00-60.00 cyc.)
  • Page 465 ETTINGS HEET Page 7 of 23 SEL-351P R OR THE ECLOSER ONTROL Date ROUP ETTINGS ERIAL OMMAND RONT ANEL Phase directional element 3-phase current pickup (0.10-2.00 A) 50P32P = (Make settings Z2F, Z2R, 50QFP, 50QRP, a2 and k2 if preceding enable setting E32 = Y.
  • Page 466 ETTINGS HEET Page 8 of 23 SEL-351P R OR THE ECLOSER ONTROL Date ROUP ETTINGS ERIAL OMMAND RONT ANEL Synchronism Check Elements (see Figures 3.24 and 3.25) (Make the following settings if preceding enable setting E25 = Y) Voltage window - low threshold (0.0-150.0 V secondary) 25VLO = Voltage window - high threshold (0.0-150.0 V secondary)
  • Page 467 ETTINGS HEET Page 9 of 23 SEL-351P R OR THE ECLOSER ONTROL Date ROUP ETTINGS ERIAL OMMAND RONT ANEL Reclose supervision time limit (0.00-16000.00 cycles in 0.25-cycle steps) (see Figure 6.2) 79CLSD = Switch-Onto-Fault (see Figure 5.3) (Make the following settings if preceding enable setting ESOTF = Y) Close enable time delay (OFF, 0.00-16000.00 cycles in 0.25-cycle steps)
  • Page 468 ETTINGS HEET Page 10 of 23 SEL-351P R OR THE ECLOSER ONTROL Date ROUP ETTINGS ERIAL OMMAND RONT ANEL Level 2 neutral ground short delay (0.00-60.00 cycles in 0.25-cycle steps) 67N2SD = Level 2 residual ground short delay (0.00-60.00 cycles in 0.25-cycle...
  • Page 469 ETTINGS HEET Page 11 of 23 SEL-351P R OR THE ECLOSER ONTROL Date ROUP ETTINGS ERIAL OMMAND RONT ANEL SV6 Pickup Time (0-999999.00 cycles in 0.25-cycle steps) SV6PU = SV6 Dropout Time (0-999999.00 cycles in 0.25-cycle steps) SV6DO = SV7 Pickup Time (0-16000.00 cycles in 0.25-cycle steps) SV7PU = SV7 Dropout Time (0-16000.00 cycles in 0.25-cycle steps)
  • Page 470 ETTINGS HEET Page 12 of 23 SEL-351P R OR THE ECLOSER ONTROL Date ROUP ETTINGS ERIAL OMMAND RONT ANEL Restore min. trip - SEF (Y,N) RPSEF = Sequence coordination (Y,N) ESEQ = Ground trip precedence (Y,N) PRECED = Date Code 990215...
  • Page 471 ETTINGS HEET Page 13 of 23 SEL-351P R OR THE ECLOSER ONTROL Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Control Equation settings consist of Relay Word bits (see Table 9.3) and SEL OGIC OGIC Control Equation operators * (AND), + (OR), ! (NOT), / (rising edge), \ (falling edge), and ( ) (parentheses).
  • Page 472 ETTINGS HEET Page 14 of 23 SEL-351P R OR THE ECLOSER ONTROL Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Latch Bits Set/Reset Equations (See Figure 7.11) Set Latch Bit LT1 SET1 = Reset Latch Bit LT1 RST1 =...
  • Page 473 ETTINGS HEET Page 15 of 23 SEL-351P R OR THE ECLOSER ONTROL Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Torque Control Equations for Time-Overcurrent Elements [NOTE: torque control equation settings cannot be set directly to logical 0] Phase (see Figure 3.14) 51P1TC = Neutral Ground (see Figure 3.16)
  • Page 474 ETTINGS HEET Page 16 of 23 SEL-351P R OR THE ECLOSER ONTROL Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Operator Control LED Equations (see Figures 1.31, 1.32, and 1.45 through 1.48) LED1 (Terra Habilitado) LED1 = LED2 (Religamento Habilitado)
  • Page 475 ETTINGS HEET Page 17 of 23 SEL-351P R OR THE ECLOSER ONTROL Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Setting Group Selection Equations (See Table 7.4) Select Setting Group 1 SS1 = Select Setting Group 2 SS2 =...
  • Page 476 ETTINGS HEET Page 18 of 23 SEL-351P R OR THE ECLOSER ONTROL Date SET G LOBAL ETTINGS ERIAL OMMAND RONT ANEL Settings Group Change Delay (see Multiple Setting Groups in Section 7) Group change delay (0.00-16000.00 cycles in 0.25-cycle steps)
  • Page 477 ETTINGS HEET Page 19 of 23 SEL-351P R OR THE ECLOSER ONTROL Date SET G LOBAL ETTINGS ERIAL OMMAND RONT ANEL Trip Latch LEDs Settings (see Figures 1.51 through 1.54) Trip latch LED11 (Y,N) LED11L = Trip latch LED12 (Y,N)
  • Page 478 ETTINGS HEET Page 20 of 23 SEL-351P R OR THE ECLOSER ONTROL Date SET R) EQUENTIAL VENTS ECORDER AND ROFILE ETTINGS ERIAL OMMAND Sequential Events Recorder settings are comprised of three trigger lists. Each trigger list can include up to 24 Relay Word bits delimited by spaces or commas. Enter NA to remove a list of these Relay Word bit settings.
  • Page 479 ETTINGS HEET Page 21 of 23 SEL-351P R OR THE ECLOSER ONTROL Date SET T) ABEL ETTINGS ERIAL OMMAND Enter the following characters: 0-9, A-Z, -, /, ., space for each text label setting, subject to the specified character limit. Enter NA to null a label.
  • Page 480 ETTINGS HEET Page 22 of 23 SEL-351P R OR THE ECLOSER ONTROL Date SET T) ABEL ETTINGS ERIAL OMMAND Local Bit LB8 Name (14 characters) NLB8 = Clear Local Bit LB8 Label (7 characters) CLB8 = Set Local Bit LB8 Label (7 characters)
  • Page 481 485) or a port configured for SEL Distributed Port Switch Protocol. Set FASTOP = Y to enable binary Fast Operate messages at the serial port. Set FASTOP = N to block binary Fast Operate messages. Refer to Appendix D for the description of the SEL-351P Relay Fast Operate commands.
  • Page 483 Wake-Up Port Default Settings ..................10-1 Port Connector and Communications Cables ................10-2 IRIG-B Time Code......................10-2 SEL-351P Recloser Control to Computer................10-3 SEL-351P Recloser Control to Modem ................10-4 SEL-351P Recloser Control to SEL-PRTU ................10-5 SEL-351P Recloser Control to SEL-2020 ................10-5 Communications Protocol......................10-6 Hardware Protocol ......................10-6 Software Protocols ......................10-6...
  • Page 484 Table 10.3: Serial Communications Port Pin/Terminal Function Definitions ........10-6 Table 10.4: Serial Port Automatic Messages..................10-9 Table 10.5: Serial Port Command Summary ..................10-12 Table 10.6: SEL-351P Recloser Control Relay Word and Its Correspondence to TAR Command ..10-37 Table 10.7: SEL-351P Recloser Control Remote Bit Control Subcommands ........10-46 FIGURES Figure 10.1: DB-9 Connector Pinout for EIA-232 Serial Ports...............

  • Page 485: Section 10: Serial Port Communications And Commands

    Serial Port 3 (EIA-232) are located on the side panel of the recloser controller. Serial Port F (EIA-232) is located on the front panel. Connect any of the SEL-351P serial ports to a computer serial port for local communication or to a modem for remote communication. Other devices useful for communications include the SEL- PRTU Port Switch and the SEL-2020 Communications Processor.

  • Page 486: Irig-B Time Code

    Table SECTION 10: .1 shows that you can input demodulated IRIG-B time synchronization code into SEL-351P Serial Port 2 to synchronize the recloser control’s built-in clock to a synchronized master clock. This is handled adeptly by connecting Serial Port 2 of the SEL-351P to an SEL-2020 Communications Processor with Cable C273A (see cable diagrams that follow in this section).

  • Page 487: Sel-351P Recloser Control To Computer

    The following cable diagrams show several types of EIA-232 serial communications cables that you can use to connect the SEL-351P to other devices. The male/female references in the cable diagrams refer to the cable connectors, not the device they are connected to (which would be the opposite gender).

  • Page 488: Sel-351P Recloser Control To Modem

    2 TXD GND 9 1 GND CTS 8 4 RTS 5 CTS 6 DSR 8 DCD 20 DTR SEL-351P Recloser Control to Modem Cable C222 (externally powered modem) SEL-351P **DCE Device 9-Pin Male 25-Pin Male “D” Subconnector “D” Subconnector GND 5...

  • Page 489: Sel-351P Recloser Control To Sel-Prtu

    SEL-351P Recloser Control to SEL-PRTU Cable C231 SEL-PRTU SEL-351P 9-Pin Male 9-Pin Male Round Conxall “D” Subconnector GND 1 5 GND TXD 2 2 RXD RXD 4 3 TXD CTS 5 7 RTS +12 7 8 CTS GND 9 9 GND...

  • Page 490: Communications Protocol

    If RTSCTS = N, the SEL-351P permanently asserts the RTS line. If RTSCTS = Y, the SEL-351P deasserts RTS when it is unable to receive characters. If RTSCTS = Y, the SEL-351P does not send characters until the CTS input is asserted. Software Protocols The SEL-351P provides standard SEL protocols: SEL ASCII, SEL Distributed Port Switch Protocol (LMD), SEL Fast Meter, and SEL Compressed ASCII.

  • Page 491: Sel Ascii Protocol

    XOFF is received and may resume when the serial port sends XON. 4. You can use the XON/XOFF protocol to control the SEL-351P during data transmission. When the serial port receives XOFF during transmission, it pauses until it receives an XON character.

  • Page 492: Sel Distributed Port Switch Protocol (Lmd)

    The protocol is described in Appendix D: Configuration, Fast Meter, and Fast Operate Commands. There are no settings required to implement or control this protocol. It is available on any SEL-351P port that is set for SEL or LMD protocol. SEL Compressed ASCII Protocol SEL Compressed ASCII protocol provides compressed versions of some of the recloser control ASCII commands.

  • Page 493: Access Level 0

    CCESS EVELS You can issue commands to the SEL-351P via the serial communication ports to view metering values, change control settings, etc. The available serial port commands are listed in Table SECTION 10: .5. A summary of commands is also included at the end of this section of the instruction manual.
  • Page 494 EZA command. Enter the ACC or the EZA command at the Access Level 0 prompt: =ACC <ENTER> =EZA<ENTER> If passwords are enabled, the SEL-351P prompts you for the Level 1 or Level E passwords, respectively. Access Level 1 When the recloser control is in Access Level 1, the control sends the following prompt: =>...
  • Page 495 Access Level E (EZ) When the SEL-351P is in Access Level E, the control sends the prompt: =+> Commands BTT through SET FZ in Table SECTION 10: .5 are available from Access Level E. Access Level E is intended to allow operators, testing, and protection personnel to make EZ level setting changes and check and test the battery system.

  • Page 496: Access Level E (Ez)

    Synchronize to IRIG-B => Load profile report => Metering data METER => Quit access level => Sequential Events Report => Show/view settings => Recloser control self-test status STATUS 10-12 Serial Port Communications and Commands Date Code 990430 SEL-351P Manual Técnico...
  • Page 497 The recloser control responds with “Invalid Access Level” if a command is entered from an access level lower than the specified access level for the command. If the command you entered does not match any of the commands in the SEL-351P command set shown in Table 10.5, the control responds:...

  • Page 498: Access Level 0 Commands

    RECLOSER R1: This is the Recloser ID, RID, setting (the control is shipped with the default setting RID = RECLOSER R1; see Identifier Labels in Section 9: Setting the SEL-351P Recloser Control). FEEDER 2101: This is the Terminal ID, TID, setting (the control is shipped with the default setting TID = FEEDER 2101;...

  • Page 499: Access Level Attempt (Password Required)

    Access Level Attempt (password not required) Assume the following conditions: Password jumper = ON (in place), Access Level = 0. At the Access Level 0 prompt, enter the ACC command: =ACC <ENTER> Date Code 990215 Serial Port Communications and Commands 10-15 SEL-351P Manual Técnico...

  • Page 500: Bre A Command (Breaker Monitor Data)

    Because the Password jumper is in place, the control does not ask for a password; it goes directly to Access Level 1. The SEL-351P responds: RECLOSER R1 Date: 03/05/97 Time: 08:31:10.361 FEEDER 2101 Level 1 => The “=>” prompt indicates the control is now in Access Level 1.

  • Page 501: Comm Command (Communication Data)

    02/20/98 18:36:09.279 02/20/98 18:37:36.114 2.835 Relay Disabled 02/14/98 13:18:09.236 02/14/98 13:18:09.736 0.499 Parity error 02/08/98 11:43:35.547 02/08/98 11:43:35.637 0.089 Underrun 02/05/98 17:18:12.993 02/05/98 17:18:13.115 0.121 Relay Disabled => Date Code 990215 Serial Port Communications and Commands 10-17 SEL-351P Manual Técnico...

  • Page 502: Dat Command (View/Change Date)

    Access Level B Commands that follows in this section and Multiple Setting Groups in Section 7: Inputs, Outputs, Timers, and Other Control Logic for further details on settings groups. 10-18 Serial Port Communications and Commands Date Code 990215 SEL-351P Manual Técnico...

  • Page 503: His Command (Event Summaries/History)

    Word bit) or other programmable event report trigger condition (Access Level 2 SET L ® Control Equation setting ER). The fault locator should not be enabled unless three OGIC phase voltage is connected to the control. Date Code 990215 Serial Port Communications and Commands 10-19 SEL-351P Manual Técnico...

  • Page 504: Iri Command (Synchronize To Irig-B Time Code)

    Standard Event Reports and SER. IRI Command (Synchronize to IRIG-B Time Code) IRI forces the SEL-351P to read the demodulated IRIG-B time code at the serial port input to force the control to synchronize to IRIG-B. Enter the following command: =>IRI <ENTER>...

  • Page 505: Ldp Command (Load Profile Report)

    If an IRIG-B signal is present, the SEL-351P synchronizes its internal clock with IRIG-B. It is not necessary to issue the IRI command to synchronize the SEL-351P internal clock with IRIG- B. You can use the IRI command to determine if the SEL-351P is properly reading the IRIG-B signal.

  • Page 506: Met K - Instantaneous Metering

    (1 - 32767) to repeat the meter display. If k is not specified, the meter report is displayed once. The output from an SEL-351P with three-phase wye-connected voltage inputs is shown:...

  • Page 507: Met D - Demand Metering

    A,B,C MVAR Three-phase megavars Reset Time Demand, Peak Last time the demands and peak demands were reset To view demand metering values, enter the command: =>MET D <ENTER> Date Code 990215 Serial Port Communications and Commands 10-23 SEL-351P Manual Técnico...

  • Page 508: Met E - Energy Metering

    The output from an SEL-351P with three-phase wye-connected voltage inputs is shown: =>MET D <ENTER> RECLOSER R1 Date: 02/01/97 Time: 15:08:05.615 FEEDER 2101 DEMAND 188.6 186.6 191.8 PEAK 188.6 186.6 191.8 MW3P MVARA MVARB MVARC MVAR3P DEMAND IN PEAK IN...

  • Page 509: Met M - Maximum/Minimum Metering

    Reset Time Last time the maximum/minimum meter was reset To view maximum/minimum metering values, enter the command: =>MET M <ENTER> The output from an SEL-351P with three-phase wye-connected voltage inputs is shown: =>MET M <ENTER> RECLOSER R1 Date: 02/01/97 Time: 15:16:00.239...

  • Page 510: Ser Command (Sequential Events Recorder Report)

    Show sequential events recorder (SER) settings. SHO R SHO T Show text label settings for the front panel display points. Also, see Table 9.1 in Section 9: Setting the SEL-351P Recloser Control for settings sheet references. 10-26 Serial Port Communications and Commands Date Code 990215 SEL-351P Manual Técnico...
  • Page 511 A to the SHO command (e.g., SHO 1 A). Below are sample SHOWSET commands for the SEL-351P showing all the factory default settings. Settings groups 1 through 6 have the same settings for SHO n, SHO EZ n, and SHO L...
  • Page 512 SV9PU = 900.00 SV9DO = 0.00 SV10PU= 0.00 SV10DO= 0.00 SV11PU= 900.00 SV11DO= 0.00 SV12PU= 0.00 SV12DO= 0.00 SV13PU= 0.00 SV13DO= 0.00 SV14PU= 0.00 SV14DO= 0.00 Continued on Next Page 10-28 Serial Port Communications and Commands Date Code 990215 SEL-351P Manual Técnico...
  • Page 513 High current lockout - phase (Y/N) High current lockout - ground (Y/N) Cold load pickup scheme (Y/N) Sequence coordination (Y/N) Underfrequency loadshedding (Y/N) Demand meter time constant (5,10,15,30,60 min) =>> Date Code 990215 Serial Port Communications and Commands 10-29 SEL-351P Manual Técnico...
  • Page 514 =(PB8 * LT4 + CC) * LT7 * TRCAP * CLCAP ULCL =TRIP + WBTRT + !(LT7 + WBCL) + !(LT4 + WBCL + CC + 79CY) 79RI =TRIP Continued on Next Page 10-30 Serial Port Communications and Commands Date Code 990430 SEL-351P Manual Técnico...
  • Page 515 51N2TC=(!SV10 + SV10 * 50G5 + SV10 * 50N5) * LT1 51G2TC=(!SV10 + SV10 * 50G5) * LT1 51QTC =1 =52A * (SV8 + SV10 + SV12) * (RPP + RPG + RPS) Continued on Next Page Date Code 990215 Serial Port Communications and Commands 10-31 SEL-351P Manual Técnico...
  • Page 516 LED24 =50G6 + 50N6 + 51N1 + 51N2 LED25 =67N3T Press RETURN to continue =PB4 * LT4 * !SG1 =PB4 * LT4 * SG1 Continued on Next Page 10-32 Serial Port Communications and Commands Date Code 990215 SEL-351P Manual Técnico...
  • Page 517 SER2 =CLOSE 52A CF 79CY 79LO 79RS SH0 SH1 SH2 SH3 SH4 PB8 59A1 SER3 =TOSLP BCBOK DTFAIL Load Profile settings: (Only available in firmware versions 1 and greater) LDLIST=0 LDAR = 5 =>> Date Code 990430 Serial Port Communications and Commands 10-33 SEL-351P Manual Técnico...

  • Page 518: Sta Command (Recloser Control Self-Test Status)

    (1 - 32767) to repeat the status display. If n is not specified, the status report is displayed once. A typical SEL-351P status report output appears as shown below: =>STA <ENTER>...

  • Page 519: Sta Command Row And Column Definitions

    Charge or discharge current in milliamps dc. If current is discharging, value is preceded by a minus sign “-”; if current is charging, value is displayed with no preceding character. Date Code 990215 Serial Port Communications and Commands 10-35 SEL-351P Manual Técnico...

  • Page 520: Tar Command (Display Relay Word Bit Status)

    SEL relays. But the execution of the equivalent TAR command via the front-panel display does remap the bottom row of the front-panel target LEDs (see OTHER pushbutton in the Pushbutton Primary Functions subsection in the Front-Panel Interface section of the SEL-351P Quick- Start Installation and User’s Guide).
  • Page 521 Table SECTION 10: .6: SEL-351P Recloser Control Relay Word and Its Correspondence to TAR Command TAR 0 LED10 LED11 LED12 LED13 LED14 LED15 LED16 LED 17 (Front-Panel (EN) (BATTERY (HOT LINE (TRIP) (FAST (HIGH (81) LEDs) SUPPLY) PROBLEM) TAG) CURVE)

  • Page 522: Tim Command (View/Change Time)

    TIM displays the recloser control clock. To set the clock, type TIM and the desired setting, then press <ENTER>. Separate the hours, minutes, and seconds with colons, semicolons, spaces, commas, or slashes. For example, to set the clock to 23:30:00, enter: 10-38 Serial Port Communications and Commands Date Code 990215 SEL-351P Manual Técnico...

  • Page 523: Tri Command (Trigger Event Report)

    BCBOK Relay Word element. If this element is not asserted, the battery charger board has failed and the control responds: =>>BTT <ENTER> Battery Charger Board FAILED =>> Date Code 990215 Serial Port Communications and Commands 10-39 SEL-351P Manual Técnico...

  • Page 524: Set Ez And Set Fz Commands (Change Ez Settings)

    (n specifies the settings group – 1, 2, 3, 4, 5, or 6). These settings are the traditional recloser control setting (e.g., min. trip, fast curve, delay curve, operations to lockout settings) and other special recloser control scheme logic (e.g., cold load pickup, sequence coordination logic). 10-40 Serial Port Communications and Commands Date Code 990215 SEL-351P Manual Técnico...

  • Page 525: Access Level B Commands

    C-phase Trips= 8 ? 10 EF/G Trips= 7 ? 12 SEF Trips= Are you sure (Y/N) ? Y <ENTER> RECLOSER R1 Date: 02/02/99 Time: 08:44:33.920 FEEDER 2101 Continued on next page Date Code 990430 Serial Port Communications and Commands 10-41 SEL-351P Manual Técnico...
  • Page 526 0.0 IC= 0.0 kA Percent wear: A= 0 B= 0 C= Continued on Next Page Continued from Previous Page A-phase Trips= B-phase Trips= C-phase Trips= EF/G Trips= SEF Trips= 10-42 Serial Port Communications and Commands Date Code 990430 SEL-351P Manual Técnico...

  • Page 527: Clo Command (Close Breaker)

    Active Group = 2 ==> The SEL-351P switches to Group 2 and pulses the ALARM contact. The control automatically outputs the Group Switch Report on all ports with the serial port setting AUTO = Y. An example Group Switch Report is shown below: ==>...

  • Page 528: Ope Command (Open Breaker)

    Typing N <ENTER> after either of the above prompts will abort the command. The OPE command is supervised by the main board Breaker jumper (see Table 2.4 and Table 2.5). If the Breaker jumper is not in place (Breaker jumper = OFF), the SEL-351P does not execute the OPE command and responds:...

  • Page 529: Pul Command (Pulse Output Contact)

    At the colon, type the Control subcommand you wish to perform (see Table SECTION 10: .7). The following example shows the steps necessary to pulse Remote Bit 5 (RB5): =>>CON 5 <ENTER> CONTROL RB5: PRB 5 <ENTER> =>> Date Code 990430 Serial Port Communications and Commands 10-45 SEL-351P Manual Técnico...

  • Page 530: Cop M N Command (Copy Setting Group)

    You must enter the same remote bit number in both steps in the command. If the bit numbers do not match, the recloser control responds “Invalid Command.” Table SECTION 10: .7: SEL-351P Recloser Control Remote Bit Control Subcommands Subcommand Description SRB n Set Remote Bit n (“ON”...

  • Page 531: Set Command (Change Settings)

    Change EZ global settings. See additional information in subsection Access Level E (EZ) Commands. Change global settings. SET G SET L n Change SEL Control Equation settings for settings OGIC Date Code 990430 Serial Port Communications and Commands 10-47 SEL-351P Manual Técnico...

  • Page 532: Sta C Command (Status Clear Command)

    The SET EZ n and SET FZ commands are available from Access Level E (EZ), too. See Table 9.1 for settings sheet references. See subsection Settings Changes via the Serial Port in Section 9: Setting the SEL-351P Recloser Control for more setting command information. STA C Command (Status Clear Command) The recloser control latches all mainboard self-test warnings and failures in order to capture transient out-of-tolerance conditions.
  • Page 533 A typical VER command response is shown below: =>>VER <ENTER> FID=SEL-351P-R100-V0-D990213 0351P-0 Wye Integral Battery Charger 1 A Nominal phase current, 0.05 A Nominal neutral current Standard Standard 263D SELboot checksum OK Date Code 990430 Serial Port Communications and Commands 10-49 SEL-351P Manual Técnico...

  • Page 535: Sel-351P Recloser Control Command Summary

    SEL-351P RECLOSER CONTROL COMMAND SUMMARY Access From Access level 0, you can go to Access Level 1 or to Access Level E (EZ). Level 0 The Access Level 0 screen prompt is: = Command Enter Access Level 1. If the main board password jumper is not in place, the control prompts you for the Access Level 1 password to enter Access Level 1.
  • Page 536 SET FZ Change EZ global settings. EZ global settings override and change a number of the global settings made with the SET G command (Access Level 2). Page 2 of 3 SEL-351P Command Summary Date Code 990430 SEL-351P Manual Técnico...
  • Page 537 Cntrl - S Send XOFF command to pause communication port output. Cntrl - X Send CANCEL command to abort current command and return to current access level prompt. Date Code 990430 SEL-351P Command Summary Page 3 of 3 SEL-351P Manual Técnico...
  • Page 538 SECTION 11: ADDITIONAL FRONT-PANEL INTERFACE DETAILS...11-1 Introduction..........................11-1 Functions Unique to the Front-Panel Interface................11-1 Reclosing Relay Shot Counter Screen ................11-1 SEL-351P Recloser Control Shot Counter Screen Operation (with factory settings) .......................11-2 Extra Local Control ......................11-3 View Extra Local Control (with factory settings)............11-4 Operate Extra Local Control (example settings) ............11-5...
  • Page 540 Reclosing relay shot counter screen (accessed via the OTHER pushbutton) • Extra local control (accessed via the CNTRL pushbutton; this is not the control available via the operator control pushbuttons on the bottom half of the SEL-351P front panel) Reclosing Relay Shot Counter Screen Use this screen to see the progression of the shot counter during reclosing relay testing.
  • Page 541 These text label settings are set with the SET T command or viewed with the SHOWSET T command via the serial port [see Section 9: Setting the SEL-351P Recloser Control and SHO Command (Show/View Settings) in Section 10: Serial Port Communications and Commands].
  • Page 542 SET RECLOSURES=3 RECLOSE COUNT =3 If the recloser is closed, the reset timer times out (79RSLD = 600), the SEL-351P goes to the reset state (front-panel LOCKOUT LED extinguishes and RESET LED illuminates), and the shot counter returns to 0. The shot counter screen appears as:...
  • Page 543 These text label settings are set with the SET T command or viewed with the SHO T command via the serial port [see Section 9: Setting the SEL-351P Recloser Control and SHO Command (Show/View Settings) in Section 10: Serial Port Communications and Commands]. See Local Control Switches in Section 7: Inputs, Outputs, Timers, and Other Control Logic for more information on local control.
  • Page 544 TRIP switch (being an OFF/MOMENTARY type switch) is in the: TRIP position for one processing interval (1/4 cycle; long enough to assert the correspond- ing local bit LB3 to logical 1). and then returns to the: Date Code 990215 Additional Front-Panel Interface Details 11-5 SEL-351P Manual Técnico...
  • Page 545 See Drive-to-Lockout and Drive-to-Last Shot Settings (79DTL and 79DLS, respectively) in Section 6: Close and Reclose Logic for more information on setting 79DTL. 11-6 Additional Front-Panel Interface Details Date Code 990215 SEL-351P Manual Técnico...
  • Page 546 The display is on a 2-second rotation for each screen. The display point example settings are: DP2 = LB1 (local bit LB1) DP4 = IN101 (optoisolated input IN101) Date Code 990215 Additional Front-Panel Interface Details 11-7 SEL-351P Manual Técnico...
  • Page 547 WHIPP & BOURNE SWITCHGEAR DP4_1 = BREAKER CLOSED PANACEA CONTROLE DO RELIGADOR DP4 = IN101 = logical 1 DP4_0 = BREAKER OPEN 79 ENABLED BREAKER CLOSED PORTA SERIAL F DWG: MP351P010 11-8 Additional Front-Panel Interface Details Date Code 990215 SEL-351P Manual Técnico...
  • Page 548 Display point label settings are set with the SET T command or viewed with the SHO T command via the serial port [see Section 9: Setting the SEL-351P Recloser Control and SHO Command (Show/View Settings) in Section 10: Serial Port Communications and Commands].
  • Page 550 Figure 12.3: Derivation of Event Report Current Values and RMS Current Values From Sampled Current Waveform..................12-31 Figure 12.4: Derivation of Phasor RMS Current Values From Event Report Current Values ....12-32 Figure 12.5: Example Sequential Events Recorder (SER) Event Report ..........12-33 Date Code 990215 Standard Event Reports and SER SEL-351P Manual Técnico...
  • Page 552 Set the event report length with the Access Level 2 global (SET G) LER setting and the prefault length with the PRE setting. See the SET G command in Table 9.1 and corresponding Settings Sheet 18 of 23 in Section 9: Setting the SEL-351P Recloser Control for instructions on setting the LER and PRE settings.
  • Page 553 ER is set to trigger standard event reports for conditions other than trip conditions. When the ER function goes from logical 0 to logical 1, it generates an event report if the SEL-351P is not already generating a report that encompasses the new transition. The factory default ER...
  • Page 554 See Section 10: Serial Port Communications and Commands and the Pushbutton Primary Functions subsection (CNTRL pushbutton) in the Front-Panel Interface section of the SEL-351P Quick-Start Installation and User’s Guide for more information on the TRI and PUL commands. Standard Event Report Summary Each time the control generates a standard event report, it also generates a corresponding event summary (see Figure SECTION 12: .1).
  • Page 555 The event type designations AG through CAG in Table SECTION 12: .1 only are entered in the “Event:” field if the fault locator operates successfully. If the fault locator does not operate successfully, just TRIP or ER is displayed. 12-4 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 556 (Y,N)” must be set to Y (yes), which forces Access Level 2 global setting, 3PVOLT, (three-phase voltages connected) to Y (yes). See the SET command in Table 9.1 and corresponding Settings Sheet 1 of 23 in Section 9: Setting the SEL-351P Recloser Control for information on the line parameter settings.
  • Page 557 Display the unfiltered analog section of the second event report at 1/4-cycle resolution. If an event report is requested that does not exist, the control responds: “Invalid Event” 12-6 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 558 Compressed ASCII Event Reports The SEL-351P provides compressed ASCII event reports to facilitate event report storage and display. The SEL-2020 Communications Processor and the SEL-5601 Analytic Assistant software take advantage of the compressed ASCII format. Use the EVE C command or CEVENT command to display compressed ASCII event reports.
  • Page 559 Table SECTION 12: .3 summarizes the event report output, input, protection, and control columns. See Tables 9.3 and 9.4 in Section 9: Setting the SEL-351P Recloser Control for more information on Relay Word bits shown in Table SECTION 12: .3.
  • Page 560 Optoisolated input IN103 asserted. Optoisolated input IN104 asserted. Both IN103 and IN104 asserted. In 56 IN105, IN106 Optoisolated input IN105 asserted. Optoisolated input IN106 asserted. Both IN105 and IN106 asserted. Date Code 990215 Standard Event Reports and SER 12-9 SEL-351P Manual Técnico...
  • Page 561 50C picked Both 50A and 50B picked up. Both 50B and 50C picked up. Both 50C and 50A picked up. 50A, 50B, and 50C picked up. 12-10 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 562 Reverse zero-sequence voltage- polarized R32V picked up. F32I Forward channel IN current- polarized directional element F32I picked up. R32I Reverse channel IN current- polarized directional element R32I picked up. Date Code 990215 Standard Event Reports and SER 12-11 SEL-351P Manual Técnico...
  • Page 563 27C1 or 27C2 picked up. 27A_ and 27B_ elements picked 27B_ and 27C_ elements picked 27C_ and 27A_ elements picked 27A_, 27B_, and 27C_ elements picked up. 12-12 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 564 59C1 or 59C2 picked up. 59A_ and 59B_ elements picked 59B_ and 59C_ elements picked 59C_ and 59A_ elements picked 59A_, 59B_, and 59C_ elements picked up. Date Code 990215 Standard Event Reports and SER 12-13 SEL-351P Manual Técnico...
  • Page 565 Both 59N1 and 59N2 picked up. 59 S 59S1, 59S2 First channel VS instantaneous overvoltage element 59S1 picked Second channel VS instantaneous overvoltage element 59S2 picked Both 59S1 and 59S2 picked up. 12-14 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 566 Frequency element 81D4 picked Both 81D3 and 81D4 picked up. 81 56 81D5, 81D6 Frequency element 81D5 picked Frequency element 81D6 picked Both 81D5 and 81D6 picked up. Date Code 990215 Standard Event Reports and SER 12-15 SEL-351P Manual Técnico...
  • Page 567 Local bit LB5 asserted. Local bit LB6 asserted. Both LB5 and LB6 asserted. Lcl 78 LB7, LB8 Local bit LB7 asserted. Local bit LB8 asserted. Both LB7 and LB8 asserted. 12-16 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 568 Latch bit LT5 asserted. Latch bit LT6 asserted. Both LT5 and LT6 asserted. Ltch 78 LT7, LT8 Latch bit LT7 asserted. Latch bit LT8 asserted. Both LT7 and LT8 asserted. Date Code 990215 Standard Event Reports and SER 12-17 SEL-351P Manual Técnico...
  • Page 569 Z3RB Zone 3 Reverse Block element asserted. KEY permissive trip element asserted. EKEY EKEY Echo KEY permissive trip element asserted. ECTT ECTT Echo Conversion To Trip element asserted. 12-18 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 570 Transmit Mirrored Bit 3 channel A deasserted and Transmit Mirrored Bit 4 channel A asserted. Transmit Mirrored Bit 3 channel A asserted and Transmit Mirrored Bit 4 channel A asserted. Date Code 990215 Standard Event Reports and SER 12-19 SEL-351P Manual Técnico...
  • Page 571 Receive Mirrored Bit 3 channel A deasserted and Receive Mirrored Bit 4 channel A asserted. Receive Mirrored Bit 3 channel A asserted and Receive Mirrored Bit 4 channel A asserted. 12-20 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 572 Receive channel B BAD for certain time element asserted. CBAD CBADA, CBADB Channel A communications availability BAD element asserted and Channel B communications availability BAD element deasserted. Date Code 990215 Standard Event Reports and SER 12-21 SEL-351P Manual Técnico...
  • Page 573 Time-overcurrent element trips (51P1T, 51P2T, 51G1T, 51G2T, 51N1T, and 51N2T) • Definite-time overcurrent element trips (67P2T, 67G2T, 67N2T, 67N3T) • Definite-time frequency element (81D1T) • Manual TRIP from front-panel pushbutton (PB9) 12-22 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 574 R command in Table 9.1 and corresponding Settings Sheet 20 of 23 at the end of Section 9: Setting the SEL-351P Recloser Control. Use either spaces or commas to delimit the elements. For example, if you enter setting SER1 as:...
  • Page 575 Month/Day/Year. If setting DATE_F = YMD, then the dates are entered Year/Month/Day. If the requested SER event report rows do not exist, the control responds: No SER Data 12-24 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 576 Clear the SER report from nonvolatile memory with the Access Level 2 command, SER C, as shown in the following example: =>SER C <ENTER> Clear the SER Are you sure (Y/N) ? Y <ENTER> Clearing Complete Date Code 990215 Standard Event Reports and SER 12-25 SEL-351P Manual Técnico...
  • Page 577 -0.8 -2.3 0.0 60.01 ..T..*.b. IA) current -826 157 -725 -1.2 -0.0 60.01 ..T..*.b. -548 -151 28 -671 -7.8 0.0 60.07 ..T..*.b. 12-26 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 578 ......*... R.0 ...b..7 ..........*... R.0 ...b..7 ..........*... R.0 ...b..7 ....Date Code 990215 Standard Event Reports and SER 12-27 SEL-351P Manual Técnico...
  • Page 579 ......*... C.0 ...b..7 ..........*... C.0 ...b..7 ..........*... C.0 ...b..7 ....12-28 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 580 *.......... *.......... [13] *.......... Date Code 990215 Standard Event Reports and SER 12-29 SEL-351P Manual Técnico...
  • Page 581 RMS values. Figure SECTION 12: .4 shows how the event report current column data can be converted to phasor RMS values. Voltages are processed similarly. 12-30 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 582 In Figure SECTION 12: .3, note that any two rows of current data from the event report in Figure SECTION 12: .2, 1/4 cycle apart, can be used to calculate RMS current values. Date Code 990215 Standard Event Reports and SER 12-31 SEL-351P Manual Técnico...
  • Page 583 SECTION 12: .2, 1/4 cycle apart, can be used to calculate phasor RMS current values. In Figure SECTION 12: .4, at the present sample, the phasor RMS current value is: IA = 991 A ∠-33.7° 12-32 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 584 SECTION 12: .2 also correspond to the # column numbers in Figure SECTION 12: .5. The SER event report in Figure SECTION 12: .5 contains records of events that occurred before and after the standard event report in Figure SECTION 12: .2. Date Code 990215 Standard Event Reports and SER 12-33 SEL-351P Manual Técnico...
  • Page 585 12:23:57.598 - 12:23:52.602 = 4.996 seconds (= 300 cycles) 4, 3 Reclose control increments reclose shot counter from 0 to 1 (SH1 asserted, SH0 deasserted). 2, 1 Close deasserts as recloser closes. 12-34 Standard Event Reports and SER Date Code 990215 SEL-351P Manual Técnico...
  • Page 586 Inspection Procedure......................13-8 Troubleshooting Procedure....................13-8 All Front-Panel LEDs Dark ..................13-8 Cannot See Characters on LCD Screen ..............13-8 SEL-351P Does Not Respond to Commands From Device Connected to Serial Port ........................13-8 SEL-351P Does Not Respond to Faults ..............13-9 Calibration ..........................13-9 Factory Assistance ........................13-9 TABLES Table 13.1: SEL-351P Recloser Control Self-Tests ................13-5...

  • Page 588: Section 13: Testing And Troubleshooting

    What to test: All connected or monitored inputs and outputs, polarity and phase rotation of ac connections, simple check of protection elements. SEL performs a complete functional check and calibration of each SEL-351P before it is shipped. This helps ensure that you receive a unit that operates correctly and accurately. Commissioning...

  • Page 589: Maintenance Testing

    SCADA control inputs, and monitoring outputs. Use an ac connection check to verify that the SEL-351P current and voltage inputs are of the proper magnitude and phase rotation. Brief fault tests ensure that the SEL-351P settings are correct. It is not necessary to test every element, timer, and function in these tests.

  • Page 590: Testing Methods And Tools

    See Section 10: Serial Port Communications and Commands. Test Methods Test the pickup and dropout of the SEL-351P elements using one of three methods: target command indication, output contact closure, or sequential events recorder (SER). Date Code 990215...

  • Page 591: Testing Via Front-Panel Indicators

    LCD. The bottom row of the LCD displays all elements asserted in Relay Word Row 6. The SEL-351P maps the state of the elements in Relay Word Row 6 on the bottom row of LEDs. The 51P1T element state is reflected on the LED labeled RS. See Table 9.3 for the correspondence between the Relay Word elements and the TAR command.

  • Page 592: Sel-351P Self-Tests

    SER report. Use this method to verify timing associated with time-overcurrent elements, reclosing relay operation, etc. Do not forget to reenter the correct SEL-351P settings when you are ready to place the SEL-351P in service.
  • Page 593 SEL-351P settings every 10 seconds. EEPROM Failure checksum Latched Performs a checksum test on the nonvolatile copy of the SEL-351P settings every 10 seconds. 13-6 Testing and Troubleshooting Date Code 990215 SEL-351P Manual Técnico...
  • Page 594 Limits Disabled Output Description The following self-tests are performed by dedicated circuitry in the microprocessor and the SEL-351P main board. Failures in these tests shut down the microprocessor and are not shown in the STATUS report. Micro- Failure Latched The SEL-351P monitors...

  • Page 595: Sel-351P Troubleshooting

    SEL-351P T ROUBLESHOOTING Inspection Procedure Complete the following procedure before disturbing the SEL-351P. After you finish the inspec- tion, proceed to the Troubleshooting Procedure. 1. Measure and record the AC power supply voltage at the power input terminals’ positions 17 and 20 on the terminal block.

  • Page 596: Sel-351P Does Not Respond To Faults

    3. CT or PT input wiring error. 4. Analog input cable between transformer secondary and main board loose or defective. 5. Failed SEL-351P self-test. ALIBRATION The SEL-351P is factory-calibrated. If you suspect that the control is out of calibration, please contact the factory. ACTORY SSISTANCE The employee-owners of Schweitzer Engineering Laboratories, Inc.
  • Page 598 BNA Message ........................D-11 APPENDIX E: COMPRESSED ASCII COMMANDS ......E-1 Introduction..........................E-1 CASCII Command – General Format..................E-1 CASCII Command – SEL-351P ....................E-2 CSTATUS Command – SEL-351P....................E-4 CHISTORY Command – SEL-351P ................... E-4 CEVENT Command – SEL-351P....................E-5...
  • Page 599 Control Equations Directly to 1 or 0 – Example........G-10 OGIC Control Equation Limitations ................G-10 OGIC Processing Order and Processing Interval ................. G-11 APPENDIX H: DISTRIBUTED NETWORK PROTOCOL (DNP) V3.00....H-1 Table of Contents Date Code 991201 SEL-351P Manual Técnico...
  • Page 600 OGIC Table G.2: Processing Order of Relay Elements and Logic (top to bottom)......... G-11 Table H.1: Data Access Methods ......................H-2 Table H.2: SEL-351P DNP Object Table....................H-5 Table H.3: SEL-351P DNP Data Map..................... H-9 FIGURES Figure F.1: Minimum Response Time Added to a Negative-Sequence Time-Overcurrent Element 51QT ..........................F-2...
  • Page 602 SEL-351P-R100-V0 Original Firmware Release. To find the firmware revision number in your SEL-351P, view the status report using the serial port STATUS command or the front-panel STATUS pushbutton. The status report displays the FID label with the Part/Revision number in bold:...
  • Page 604 SEL occasionally may offer firmware upgrades to improve the performance of your relay. The SEL-351P Recloser Control stores firmware in FLASH memory; therefore, changing physical components is not necessary. Relay firmware is upgraded by downloading a file from a personal computer to the relay via a serial port, as outlined in the following sections.
  • Page 605 The file transfer takes approximately 10 minutes at 38400 baud. After the transfer completes, the relay will reboot and return to Access Level 0. The following screen capture shows the entire process. Firmware Upgrade Instructions Date Code 990215 SEL-351P Manual Técnico...
  • Page 606 14. Apply current and voltage signals to the relay. Issue the METER command; verify the current and voltage signals are correct. Issue the TRIGGER and EVENT commands. Verify the current and voltage signals are correct in the EVENT report. Date Code 990215 Firmware Upgrade Instructions SEL-351P Manual Técnico...
  • Page 607 The relay is now ready for your commissioning procedure. Firmware Upgrade Instructions Date Code 990215 SEL-351P Manual Técnico...
  • Page 608 6. Enter the sequence CTRL-X QUIT <CR> before entering the prefix character if all relays in the multidrop network do not have the same prefix setting. Note: You can use the front-panel SET pushbutton to change the port settings to return to SEL protocol. Date Code 990215 SEL Distributed Port Switch Protocol SEL-351P Manual Técnico...
  • Page 610 ASCII commands can also be accessed by a device that does not interleave the data streams. SEL Application Guide AG95-10, Configuration and Fast Meter Messages, is a comprehensive description of the SEL binary messages. Below is a description of the messages provided in the SEL-351P Recloser Control. ESSAGE ISTS Binary Message List...
  • Page 611 ESSAGE EFINITIONS A5C0 Relay Definition Block In response to the A5C0 request, the SEL-351P sends the following block: Data Description A5C0 Command Length Support two protocols, SEL, M ™, DNP, and LMD IRRORED Support three Fast Meter messages Support three status flag commands...
  • Page 612 Standard Power Calculations FFFF No Deskew angle FFFF No Rs compensation (-1) FFFF No Xs compensation (-1) IA channel index IB channel index IC channel index VA channel index Date Code 990430 Configuration, Fast Meter, and Fast Operate Commands SEL-351P Manual Técnico...
  • Page 613 VB channel index VC channel index Reserved checksum 1-byte checksum of all preceding bytes A5D1 Fast Meter Data Block In response to the A5D1 request, the SEL-351P sends the following block: Data Description A5D1 Command Length 1-byte 1 Status Byte...
  • Page 614 Scale factor offset in Fast Meter message 50412D000000 Analog channel name (PA-) Analog channel type Scale factor type 0000 Scale factor offset in Fast Meter message 50422D000000 Analog channel name (PB-) Date Code 990430 Configuration, Fast Meter, and Fast Operate Commands SEL-351P Manual Técnico...
  • Page 615 MVA I, MVB I, MVC I, MV3PI, MWA O, MWB O, MWC O, MW3PO, MVA O, MVB O, MVC O, MV3PO in 8-byte IEEE FPS 8-bytes Time stamp 1-byte Reserved 1-byte 1-byte checksum of all preceding bytes Configuration, Fast Meter, and Fast Operate Commands Date Code 990430 SEL-351P Manual Técnico...
  • Page 616 In response to the A5B9 request, the relay clears the Fast Meter (message A5D1) Status Byte. The SEL-351P Status Byte contains one active bit, STSET (bit 4). The bit is set on power up and on settings changes. If the STSET bit is set, the external device should request the A5C1, A5C2, and A5C3 messages.
  • Page 617 SV4PU = 0 SV4 pickup time = 0 SV4DO = 30 SV4 dropout time is 30 cycles To pulse the contact, send the A5E006430DDB command to the relay. Configuration, Fast Meter, and Fast Operate Commands Date Code 990430 SEL-351P Manual Técnico...
  • Page 618 A5D1 message. The first name is associated with the MSB, the last name with the LSB. These names are listed in the Relay Word Bits table in Section 9: Setting the SEL-351P Recloser Control. The DNA command is available from Access Level 1 and higher.
  • Page 619 "SV13","SV14","SV15","SV16","SV13T","SV14T","SV15T","SV16T","yyyy" "79RS","79CY","79LO","SH0","SH1","SH2","SH3","SH4","yyyy" "CLOSE","CF","RCSF","OPTMN","RSTMN","FSA","FSB","FSC","yyyy" "BCW","50P32","NOBATT","59VA","TRGTR","52A","COMMT","CHRGG","yyyy" "SG1","SG2","SG3","SG4","SG5","SG6","ZLOUT","ZLIN","yyyy" "ZLOAD","BCWA","BCWB","BCWC","BCBOK","TOSLP","DISTST","DTFAIL","yyyy" "ALARM","OUT107","OUT106","OUT105","OUT104","OUT103","OUT102","OUT101", "yyyy" "3PO","SOTFE","Z3RB","KEY","EKEY","ECTT","WFC","PT","yyyy" "PTRX2","PTRX","PTRX1","UBB1","UBB2","UBB","Z3XT","DSTRT","yyyy" "NSTRT","STOP","BTX","TRIP","OC","CC","CLG","NOMSG","yyyy" "67P2S","67N2S","67G2S","67Q2S","PDEM","NDEM","GDEM","QDEM","yyyy" "PB1","PB2","PB3","PB4","PB5","PB6","PB7","PB8","yyyy" "PB9","*","*","*","WBTRT","SF6LO","DISCHG","LED9","yyyy" "LED1","LED2","LED3","LED4","LED5","LED6","LED7","LED8","yyyy" "OCP","OCG","OLP","OLG","OLS","HTP","HTG","HLP","yyyy" "HLG","CLP","RPP","RPG","RPS","SEQC","3PHV","GTP","yyyy" "RMB8A","RMB7A","RMB6A","RMB5A","RMB4A","RMB3A","RMB2A","RMB1A","yyyy" "TMB8A","TMB7A","TMB6A","TMB5A","TMB4A","TMB3A","TMB2A","TMB1A","yyyy" "RMB8B","RMB7B","RMB6B","RMB5B","RMB4B","RMB3B","RMB2B","RMB1B","yyyy" "TMB8B","TMB7B","TMB6B","TMB5B","TMB4B","TMB3B","TMB2B","TMB1B","yyyy" "LBOKB","CBADB","RBADB","ROKB","LBOKA","CBADA","RBADA","ROKA","yyyy" "*","*","*","*","*","*","*","*","yyyy" "*","*","*","*","*","*","*","*","yyyy" "*","*","*","*","*","*","*","*","yyyy" "*","*","*","*","*","*","*","*","yyyy" D-10 Configuration, Fast Meter, and Fast Operate Commands Date Code 990430 SEL-351P Manual Técnico...
  • Page 620 "yyyy" is the 4-byte ASCII representation of the checksum. "*" indicates an unused bit location. The BNA command is available from Access Level 1 and higher. Date Code 990430 Configuration, Fast Meter, and Fast Operate Commands D-11 SEL-351P Manual Técnico...
  • Page 622 APPENDIX E: COMPRESSED ASCII COMMANDS NTRODUCTION The SEL-351P Recloser Control provides compressed ASCII versions of some of the relay’s ASCII commands. The compressed ASCII commands allow an external device to obtain data from the relay, in a format which directly imports into spreadsheet or database programs, and which can be validated with a checksum.
  • Page 623 If a compressed ASCII request is made for data that are not available, (e.g. the history buffer is empty or invalid event request), the relay responds with the following message: <STX>"No Data Available","0668"<CR><ETX> CASCII C – SEL-351P OMMAND Display the SEL-351P compressed ASCII configuration message by sending: CAS <CR> The SEL-351P sends: <STX> "CAS",5,"YYYY"<CR> "CST",1,"YYYY"<CR>...
  • Page 624 YYYY is the 4-byte hex ASCII representation of the checksum. See the CEVENT command for definition of the “Names of elements in the relay word Rows 2 - 59 separated by spaces” field. Date Code 990215 Compressed ASCII Commands SEL-351P Manual Técnico...
  • Page 625 CSTATUS C – SEL-351P OMMAND Display status data in compressed ASCII format by sending: CST <CR> The SEL-351P sends: <STX>"FID","BCBFID","yyyy"<CR> "Relay FID string","Relay Battery Charger Board FID string","yyyy"<CR> "MONTH","DAY","YEAR","HOUR","MIN","SEC","MSEC","yyyy"<CR> "xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","yyyy"<CR> "IA","IB","IC","IN","VA","VB","VC","VS","MOF","+5V_PS","+5V_REG", "-5V_REG","+12V_PS","-12V_PS","+15V_PS","yyyy"<CR> "xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx", "xxxx","xxxx","xxxx","xxxx","xxxx","yyyy"<CR> "-15V_PS","TEMP","RAM","ROM","A/D","CR_RAM","EEPROM","IO_BRD","SF6", "MODE","%CAP","HRS_LFT","5V_PSBC","12V_AUX","VBAT","IBAT","yyyy"<CR> "xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","xxxx", "xxxx","xxxx","xxxx","xxxx","xxxx","xxxx","yyyy"<CR><ETX> where: xxxx is the data values corresponding to the first line labels and yyyy is the 4-byte hex ASCII representation of the checksum.
  • Page 626 LOCATION is the fault location. SHOT is the recloser shot counter. TARGETS are the front-panel tripping targets. IA, IB, IC, IN, IG, 3I2 is the fault current. TRIG refers to the trigger record. Date Code 990215 Compressed ASCII Commands SEL-351P Manual Técnico...
  • Page 627 Relay Word are “10”. In binary, this evaluates to 00010000. Mapping the labels to the bits yields: 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). Compressed ASCII Commands Date Code 990215 SEL-351P Manual Técnico...
  • Page 628 51QTD, that results in curve times below 3 cycles (see curves in Figures 9.1 through 9.20 in Section 9: Setting the SEL-351P Recloser Control). This is because negative-sequence current can transiently appear when a circuit breaker is closed and balanced load current suddenly appears.
  • Page 629 The following coordination guidelines and example assume that the negative-sequence overcurrent elements operate on 3I magnitude negative-sequence current and that the power system is radial. The negative-sequence overcurrent elements in the SEL-351P Recloser Control operate on 3I magnitude negative-sequence current.
  • Page 630 3I magnitude negative-sequence current. The SEL-351P can be inserted as the feeder relay in this example. Note that the overcurrent element labels in the example are not the same as the labels of the corresponding SEL-351P overcurrent elements.
  • Page 631 Traditional Phase Coordination Figure APPENDIX F: .3: Traditional Phase Coordination 51F: pickup = 600 A (above max. feeder load, I 51R: pickup = 200 A (above max. line recloser load, I Setting Negative-Sequence Overcurrent Elements Date Code 990215 SEL-351P Manual Técnico...
  • Page 632 (51QF in Figure APPENDIX F: .5) by applying the equation given in Guideline 4. The time dial (lever) and curve type of the Date Code 990215 Setting Negative-Sequence Overcurrent Elements SEL-351P Manual Técnico...
  • Page 633 It is coordinated with the distribution feeder phase or negative-sequence overcurrent elements and provides more-sensitive and faster phase-to-phase fault backup. Setting Negative-Sequence Overcurrent Elements Date Code 990215 SEL-351P Manual Técnico...
  • Page 634 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. Date Code 990215 Setting Negative-Sequence Overcurrent Elements SEL-351P Manual Técnico...
  • Page 636 Control Equation setting details are available in Section 9: Setting the OGIC SEL-351P Recloser Control (see also Settings Sheets 13 through 17 in the back of Section 9 ). See the SHO command (Show/View Settings) in Section 10: Serial Port Communications and Commands for a list of the factory settings shipped with the SEL - 351P Recloser Control in a standard relay shipment.
  • Page 637 51P1T trip logic (see SEL Control Equation trip setting TR example later in this OGIC section) 51P1R used in testing (e.g., assign to an output contact for reset indication) ® Setting SEL Control Equations Date Code 990430 OGIC SEL-351P Manual Técnico...
  • Page 638 OGIC Table APPENDIX G: .1. Table APPENDIX G: .1: SEL Control Equation Operators (listed in processing OGIC order) Operator Logic Function rising edge detect falling edge detect parentheses ® Date Code 990430 Setting SEL Control Equations OGIC SEL-351P Manual Técnico...
  • Page 639 IN1 is deenergized [IN1 = 0 (logical 0)]: 52A = !IN101 = NOT(IN101) = NOT(0) = 1 Thus, the SEL Control Equation circuit breaker status setting 52A sees a closed circuit OGIC breaker. ® Setting SEL Control Equations Date Code 990430 OGIC SEL-351P Manual Técnico...
  • Page 640 The rising edge operator / is applied to individual Relay Word bits only – not to groups of elements within parentheses. For example, the SEL Control Equation event report OGIC generation setting uses rising edge operators: ER = /51P1 + /51G1 + /OUT103 ® Date Code 990430 Setting SEL Control Equations OGIC SEL-351P Manual Técnico...
  • Page 641 0 to logical 1 transition as a “rising edge” and the resultant asserts to logical 1 for one processing interval. The assertions of 51G1 and 51P1 are close enough that they will be ® Setting SEL Control Equations Date Code 990430 OGIC SEL-351P Manual Técnico...
  • Page 642 Note that Figure 5.1 in Section 5: Trip and Target Logic appears quite complex. But since tripping does not involve communications-assisted or switch-onto-fault trip logic in this example, respective SEL Control Equation trip settings TRCOMM and TRSOTF are not used. The OGIC ® Date Code 990430 Setting SEL Control Equations OGIC SEL-351P Manual Técnico...
  • Page 643 If maximum phase current is above the phase instantaneous overcurrent element pickup setting 50P1P for the reoccurring fault, Relay Word bit 50P1 is in the following state: 50P1 = 1 (logical 1) ® Setting SEL Control Equations Date Code 990430 OGIC SEL-351P Manual Técnico...
  • Page 644 Control Equation setting is set equal to 0, it is OGIC always “deasserted/off/disabled.” Note: SEL Control Equation torque control settings (e.g., 67P1TC, 51P1TC) cannot be set OGIC to logical 0. ® Date Code 990430 Setting SEL Control Equations OGIC SEL-351P Manual Técnico...
  • Page 645 0 (logical 0) also have to be included in this combined limit of 330 Relay Word bits – each such setting counted as one Relay Word bit. G-10 Setting ® Date Code 990430 Control Equation OGIC SEL-351P Manual Técnico...
  • Page 646 After SEL Control Equations settings changes have been made and the settings are saved, OGIC the SEL-351P responds with the following message: xxx Elements remain available indicating that “xxx” Relay Word bits can still be used for the particular setting group.
  • Page 647 Schemes UBB2, UBB, Z3RB, KEY, EKEY, (PT1, LOG1, PT2, LOG2, BT) ECTT, WFC, Z3XT, DSTRT, NSTRT, STOP, BTX Trip Logic (TR, TRSOTF, TRCOMM, TRIP Section 5 DTT, ULTR) G-12 Setting ® Date Code 990430 Control Equation OGIC SEL-351P Manual Técnico...
  • Page 648 TMB1B. . .TMB8B Setting Group (SS1 - SS6) SG1 - SG6 Section 7 Event Report Trigger (ER) Section 12 Recloser Breaker Status RAW52B, RAW52A, WB52A Section 7 ® Date Code 990430 Setting SEL Control Equations G-13 OGIC SEL-351P Manual Técnico...

  • Page 650: Overview

    APPENDIX H: DISTRIBUTED NETWORK PROTOCOL (DNP) V3.00 VERVIEW The SEL-351P Recloser Control supports Distributed Network Protocol (DNP) V3.00 L2 Slave protocol. This includes access to metering data, protection elements (Relay Word), contact I/O, targets, sequential events recorder, breaker monitor, relay summary event reports, settings groups, and time synchronization.

  • Page 651: Data-Link Operation

    Table APPENDIX H: .1: Data Access Methods Data Retrieval Method Description Relevant SEL-351P Settings Polled Static The master polls for static (Class Set ECLASS = 0, 0) data only.

  • Page 652: Device Profile

    This document must be accompanied by a table having the following headings: Object Group Request Function Codes Response Function Codes Object Variation Request Qualifiers Response Qualifiers Object Name (optional) Vendor Name: Schweitzer Engineering Laboratories, Inc. Device Name: SEL-351P Highest DNP Level Supported: Device Function: For Requests Level 2 Master Slave...
  • Page 653 FILL OUT THE FOLLOWING ITEM FOR MASTER DEVICES ONLY: Expects Binary Input Change Events: Either time-tagged or non-time-tagged for a single event Both time-tagged and non-time-tagged for a single event Configurable (attach explanation) Distributed Network Protocol (DNP) V3.00 Date Code 991201 SEL-351P Manual Técnico...

  • Page 654: Object Table

    Point-by-point list attached Other Value Point-by-point list attached Sends Multi-Fragment Responses: In all cases within the device profile that an item is configurable, it is controlled by SEL-351P settings. BJECT ABLE The supported object, function and qualifier code combinations are given by the following object table.
  • Page 655 Counter Change Event - All Variations 6,7,8 32-Bit Counter Change Event without Time 6,7,8 17,28 16-Bit Counter Change Event without Time 6,7,8 129,130 17,28 32-Bit Delta Counter Change Event without Time Distributed Network Protocol (DNP) V3.00 Date Code 991201 SEL-351P Manual Técnico...
  • Page 656 Frozen Analog Event - All Variations 32-Bit Frozen Analog Event without Time 16-Bit Frozen Analog Event without Time 32-Bit Frozen Analog Event with Time 16-Bit Frozen Analog Event with Time Date Code 991201 Distributed Network Protocol (DNP) V3.00 SEL-351P Manual Técnico...
  • Page 657 Private Registration Object Descriptor Application Identifier Short Floating Point Long Floating Point Extended Floating Point Small Packed Binary-Coded Decimal Medium Packed Binary-Coded Decimal Large Packed Binary-Coded Decimal No object 13,14,23 Distributed Network Protocol (DNP) V3.00 Date Code 991201 SEL-351P Manual Técnico...

  • Page 658: Data Map

    The following is the default object map supported by the SEL-351P (FID = SEL-351P-Rxxx-V0- Dxxxxxx). Table APPENDIX H: .3: SEL-351P DNP Data Map DNP Object Type Index Description 01,02 000 - 499 Relay Word, where 50B3 is 0 and 67P2S is 319.
  • Page 659 A-, B-, C-, and 3-phase peak demand MW out. 30,32 98 - 101 A-, B-, C-, and 3-phase peak demand MVAR out. 30,32 102 - 104 Breaker contact wear percentage (A, B, C). H-10 Distributed Network Protocol (DNP) V3.00 Date Code 991201 SEL-351P Manual Técnico...
  • Page 660 In order to determine an element’s point index, consult the Relay Word Bits table in Section 9: Setting the SEL-351P Recloser Control. Locate the element in question in the table and note the Relay Word row number. From that row number, subtract the row number of the first Relay Word row (usually 2) and multiply that result by 8.

  • Page 661: Relay Summary Event Data

    The event summary analogs will retain this information until the next event is loaded. H-12 Distributed Network Protocol (DNP) V3.00 Date Code 991201 SEL-351P Manual Técnico...

  • Page 662: Point Remapping

    Enter the new DNP Analog map 112 28 17 \<CR> 35 1 56 57 58 59 60 61 62 63 64 65 66 67 100 101 102 \<CR> 103<CR> ==>DNP B Date Code 991201 Distributed Network Protocol (DNP) V3.00 H-13 SEL-351P Manual Técnico...
  • Page 663 <CR> Enter the new DNP Binary map ==> H-14 Distributed Network Protocol (DNP) V3.00 Date Code 991201 SEL-351P Manual Técnico...
  • Page 664 Number of events to transmit on (1 - 200) NUMEVE Age of oldest event to force transmit on, seconds (0.0 - 60.0) AGEEVE Time-out for confirmation of unsolicited message, seconds (1 - 50) UTIMEO Date Code 991201 Distributed Network Protocol (DNP) V3.00 H-15 SEL-351P Manual Técnico...

  • Page 666: Appendix I: Mirrored Bits

    The information exchanged can facilitate remote control, remote sensing, or communications-assisted protection schemes such as POTT, DCB, etc. The SEL-351P Recloser Control supports two channels, differentiated by the channel specifiers A and B. Bits transmitted are IRRORED called TMB1x through TMB8x, where x is the channel specifier (e.g., A or B), and are controlled...

  • Page 667: Synchronization

    1/4 cycle processing interval. So, a counter set to two will again delay a bit by about 1/2 cycle. However, in that same example, a security counter set to two on the SEL-351P will delay a bit by 1/4 cycle, because the SEL-351P is receiving new M IRRORED messages each 1/8 cycle from the SEL-321.

  • Page 668: Loop-Back Testing

    The relay resets RTS (to a negative voltage at the EIA-232 connector) for M IRRORED communications using this specification. The relay sets RTS (to a positive voltage at the EIA-232 connector) for M communications using the R6 or original R version of IRRORED IRRORED Date Code 990430 IRRORED SEL-351P Manual Técnico...

  • Page 669: Settings

    CBADA is asserted. The times used in the calculation are those that are available in the COMM records. See the COMM command in the SEL-321, SEL-351, or SEL-351P manuals for a description of the COMM records. Mirrored Bits transmit identifier(1 - 4)
  • Page 670 Mirrored Bits RMB_ Debounce DO time (1-8 msgs) RMB8DO= 1 Supervise the transfer of received data (or default data) to RMB1A RMB8A with the pickup and dropout security counters. Set the pickup and dropout counters IRRORED individually for each bit. Date Code 990430 IRRORED SEL-351P Manual Técnico...
  • Page 672 SEL-351P RECLOSER CONTROL COMMAND SUMMARY Access From Access level 0, you can go to Access Level 1 or to Access Level E (EZ). Level 0 The Access Level 0 screen prompt is: = Command Enter Access Level 1. If the main board password jumper is not in place, the control prompts you for the Access Level 1 password to enter Access Level 1.
  • Page 673 SET FZ Change EZ global settings. EZ global settings override and change a number of the global settings made with the SET G command (Access Level 2). Page 2 of 3 SEL-351P Command Summary Date Code 990430 SEL-351P Manual Técnico...
  • Page 674 Cntrl - S Send XOFF command to pause communication port output. Cntrl - X Send CANCEL command to abort current command and return to current access level prompt. Date Code 990430 SEL-351P Command Summary Page 3 of 3 SEL-351P Manual Técnico...

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