Schweitzer Engineering Laboratories SEL-351R User manual

SEL-351R
RECLOSER CONTROL
INSTRUCTION MANUAL
IMPORTANT: Use this manual in conjunction with the SEL-351R
Quick-Start Installation and User’s Guide.
SCHWEITZER ENGINEERING LABORATORIES
2350 NE HOPKINS COURT
PULLMAN, WA USA 99163-5603
TEL: [phone] FAX: [phone]

!
CAUTION: The relay contains devices sensitive to
electrostatic discharge (ESD). When working on
the relay with front or top cover removed, work
surfaces and personnel must be properly grounded
or equipment damage may result.
!
ATTENTION: Le relais contient des pièces
sensibles aux décharges électrostatiques (DES).
Quand on travaille sur le relais avec le panneau
avant ou du dessus enlevé, les surfaces de travail et
le personnel doivent être mis à la terre
convenablement pour éviter les dommages à
l'équipement.
!
CAUTION: There is danger of explosion if the
battery is incorrectly replaced. Replace only with
Ray-O-Vac®no. BR2335 or equivalent
recommended by manufacturer. Dispose of used
batteries according to the manufacturer’s
instructions.
!
ATTENTION: Il y a un danger d’explosion si la
pile électrique n’est pas correctement remplacée.
Utiliser exclusivement Ray-O-Vac®No. BR2335 ou
un équivalent recommandé par le fabricant. Se
débarrasser des piles usagées suivant les
instructions du fabricant.
!
WARNING: This device is shipped with default
passwords. Default passwords should be changed to
private passwords at installation. Failure to change
each default password to a private password may
allow unauthorized access. SEL shall not be
responsible for any damage resulting from
unauthorized access.
!
AVERTISSEMENT: Cet équipement est expédié
avec des mots de passe par défaut. A l'installation,
les mots de passe par défaut devront être changés
pour des mots de passe confidentiels. Dans le cas
contraire, un accès non-autorisé à l'équipement
pourrait être possible. SEL décline toute
responsabilité pour tout dommage résultant de cet
accès non-autorisé.
The software (firmware), schematic drawings, relay commands, and relay messages are copyright protected by the United States Copyright Law and
International Treaty provisions. ll rights are reserved.
You may not copy, alter, disassemble, or reverse-engineer the software. You may not provide the software to any third party.
ll brand or product names appearing in this document are the trademark or registered trademark of their respective holders.
Schweitzer Engineering Laboratories, SELOGIC, Connectorized, Job Done, SEL-PROFILE, CSELER TOR, and are registered trademarks of Schweitzer
Engineering Laboratories.
The English language manual is the only approved SEL manual.
Copyright © SEL 1997, 1998, 1999, 2000, 2001, 2002 ( ll rights reserved) Printed in US .
This product is covered by U.S. Patent Numbers: 5,790,418; 5,208,545; 5,317,472; 5,602,707; 5,367,426; 5,515,227; 5,883,578; 5,349,490; 5,365,396;
5,041,737; 5,479,315; 5,793,750; 5,694,281; and U.S. Patent(s) Pending, and Foreign Patent(s) Issued and Pending.
This product is covered by the standard SEL 10-year warranty. For warranty details, visit www.selinc.com or contact your customer service
representative. Note: The 24 Vdc battery inside the SEL-351R Recloser Control enclosure is excluded from the product warranty. PM351R-01

Date Code 20020215 Manual Change Information i
SEL-351R Instruction Manual
MANUAL CHANGE INFORMATION
The date code at the bottom of each page of this manual reflects the creation or revision date.
Date codes are changed only on pages that have been revised and any following pages affected
by the revisions (i.e., pagination). If significant revisions are made to a section, the date code on
all pages of the section will be changed to reflect the revision date.
Each time revisions are made, both the main table of contents and the affected individual section
table of contents are regenerated and the date code is changed to reflect the revision date.
Changes in this manual to date are summarized below (most recent revisions listed at top).
Revision
Date Summary of Revisions
The Manual Change Information section has been created to begin a record of revisions to
this manual. All changes will be recorded in this Summary of Revisions table.
20020215 This revision includes the following changes:
- Reissued entire manual with post script fonts.
Section 1:
- Added the setting “Phantom voltages from
(VA,VB,VC,VAB,VBC,VCA,OFF)” to Table 1.1.
Section 7:
- Increased the number of local, latch, and remote bits and display points to 16
for SEL-351R-2.
- Added description of new SELOGIC counter feature.
Section 8:
- Added description of how the relay generates phantom voltages.
Section 9:
- Included Relay Word bits for additional local, remote, and latch bits in
Table 9.3 and Table 9.4.
- Added eight set and reset equations for latch bits; increment, decrement, and
reset equations for SELOGIC counters; and eight additional display point
equations to the SELOGIC control equation settings sheets.
Section 10:
- Included the COU command in Table 10.5, and also added a description and
screen capture of the command. The description of the metering command
also briefly describes how phantom voltages are generated.
- Additional screen captures for SHO G and SHO FZ commands on an
SEL-351R-2 show the new phantom voltage setting.
- The descriptions of SHO L and SHO T now mention the availability of eight
additional latch, local, and remote bits and display points.
- Eight additional local, remote, and latch bits were added to Table 10.6 for the
SEL-351R-2.

ii Manual Change Information Date Code 20020215
SEL-351R Instruction Manual
Revision
Date Summary of Revisions
Appendix A:
- Updated firmware version information.
Appendix B:
- Incorporated new Firmware Upgrade Instructions: Date Code 20020118
Appendix D:
- Changed Fast commands to reflect additional Relay Word bits and remote bits
available on the SEL-351R-2.
Appendix G:
- Created a description of an SELOGIC analog compare statement, which is now
available in the SEL-351R-2, and added the processing slot for the counters to
Table G.3.
Appendix H:
- Updated the DNP map in Table H.3 to show the new capabilities of the
SEL-351R-2.
20010518 This revision includes the following changes:
- Reissued entire manual.
- Replaced Standard Product Warranty page with warranty statement on cover
page.
Section 1:
- Discussed defeating three-second delay on LOCK operator control
(Figure 1.38).
- Discussed changes to front-panel AC SUPPLY LED settings in Reclose
Supervision Logic subsection and made LED11 logic settings change in
Figure 1.51.
Section 2:
- Added caution note to the Clock Battery subsection.
Section 3:
- Doubled the voltage ranges (e.g., 150 to 300 V secondary) of the voltage
element settings in Table 3.8, Table 3.9, and Table 3.10.
Section 4:
- Changed the impedance settings ranges for load-encroachment and directional
elements to match the 1 a nominal secondary settings ranges in other SEL-351
family relays.
Section 5:
- Added SELOGIC Control Equation Setting FAULT subsection at end of
section.

Date Code 20020215 Manual Change Information iii
SEL-351R Instruction Manual
Revision
Date Summary of Revisions
Section 7:
- Added ac setting description to Input Debounce Timers subsection.
- Updated subsection Note: Make Latch Control Switch Settings With Care.
- Updated subsection Note: Make Active Setting Group Switching Settings
With Care.
- Added subsection Displaying Values (other than user-entered text) on the
Rotating Default Display near the end of the section.
Section 9:
- Relay Words bits DDATA and DCONN added to Table 9.3 and Table 9.4
(row 56)—used in automatic dial-out via DNP.
- Changed the impedance settings ranges for line settings, load-encroachment
elements, and directional elements to match the 1 A nominal secondary
settings ranges in other SEL-351 family relays (Settings Sheet pages 1, 6, and
7 respectively).
- Doubled the voltage settings ranges (e.g., 150 to 300 V secondary) on Setting
Sheets page 7 and page 8.
- Added ac setting choice to optoisolated input timers on Setting Sheets page 18.
- Added Y1 and N1 settings options and explanation for setting RSTLED on
Setting Sheets page 19 (for defeating the three-second delay on the LOCK
operator control).
- Added PROTO = DNPE, and AUTO = DTA settings choices to the Port
Settings Sheet page 23.
Section 10:
- Added DTA2 compatibility information.
- Added MIRRORED BITS Communications subsection.
- Added notes about powering down the relay after setting the date and time.
- Added MET X command description.
- Updated SELOGIC setting LED11 = !DISCHG in listing of factory default
settings in the SHO Command (Show/View Settings) subsection.
- Updated password information.
- Added warning note to the PAS Command (View/Change Passwords)
subsection.
- Updated Command Summary to include MET X command.
Section 12:
- Corrected explanation for column “32 NG”in Table 12.3 (“F32I”and “R32I”
should be “F32N”and “R32N”, respectively; corresponding symbols should be
“N”and “n”.
Appendix A:
- Updated firmware version information.

i Manual Change Information Date Code 20020215
SEL-351R Instruction Manual
Revision
Date Summary of Revisions
Appendix H:
- Added Extended Mode DNP details and settings.
- Added UNSOL = DIAL as a settings choice for DNP (for automatic dial-out).
- Added DNP automatic dial-out information.
20000602 This revision includes the following changes:
Section 3:
- Corrected Figure 3.20.
Section 8:
- Added qualifying statement about changing the LDAR setting.
Section 9:
- Added qualifying statement concerning the SET scommand in Settings
Changes via the Serial Port.
Appendix A:
- Released new firmware version.
Appendix H:
- DNP labels (DECPLA, DECPLV, DECPLM) now correctly identified.
20000407 This revision includes the following changes:
Reissued entire manual.
Section 3:
- Clarified the operation of the synchronism check elements for breaker close
time setting TCLOSD = 0.00 in the Synchronism Check Elements subsection
(see Figure 3.25).
Section 5:
- Added explanation to the target LEDs information near the end of the section
that the target LEDs no longer reset if a TRIP condition is present.
Section 9, Settings Sheet 20 of 23:
- Corrected demand ammeter element names for load profile.
Section 10:
- Corrected number of event reports stored in relay in HIS Command subsection.
- Added NOMSG state and explanation to battery monitor/charger mode
displayed with STATUS command.
- Added note to the TAR R command explanation that the target LEDs no longer
reset if a TRIP condition is present.
- Corrected Relay Word bit entries 32NE (row TAR 15) and F32N and R32N
(row TAR 17) in Table 10.6.

Date Code 20020215 Manual Change Information
SEL-351R Instruction Manual
Revision
Date Summary of Revisions
Appendix D:
- Corrected length and digital bank parameters for A5D1 Fast Meter data block.
- Corrected 32NE, F32N, and R32N entries for DNA message. Added 50NF,
50NR, 32NF, and 32NR entries for DNA message.
Appendix G:
- Updated SELOGIC®Control Equation limitations.
991123 Appendix H:
- Corrected documentation errors in DNP 3.0 Device Profile, page H-5.
990628 This revision includes the following changes:
- Updated MIRRORED BITS™format throughout to reflect new trademark.
Section 1:
- Added phase pickup setting 50P4P to Table 1.1. Setting 50P4P is set (in A
secondary) when Min. trip-phase is set (in A primary) in the EZ setting routing
(SET EZ command). Phase pickup setting 50P4P controls single-phase
elements 50A4, 50B4, and 50C4, listed in Table 1.2. These single-phase
elements indicate faulted phases for the trip operations counters (see
discussion on trip operation counters in the Breaker/Recloser Contact Wear
Monitor subsection in Section 8: Breaker/Recloser Monitor, Battery System
Monitor, and Load Profile Functions).
Section 3:
- Added explanation to the Synchronism Check Elements subsection for the
new angle setting option for the SYNCP (synchronizing phase) setting.
Synchronism check can now be accomplished for synchronism check voltage
input VS connected phase-phase or beyond a delta-wye transformer. Setting
SYNCP accounts for the constant angle difference between reference voltage
input VA and synchronism check voltage input VS.
Section 7:
- Clarified the operation of the latch control switches when the SEL-351R
Recloser Control loses power (see the Latch Control Switches subsection).
Section 8:
- Added discussion on the per-phase and ground trip operation counter
information now available via the BRE A command in the Breaker/Recloser
Contact Wear Monitor subsection.
Section 9:
- Expanded the setting range for the SYNCP (synchronizing phase) setting to
accommodate compensation angle settings for synchronism check (Settings
Sheet 8 of 23).
- Added the MB8A and MB8B serial port protocol settings options for
MIRRORED BITS protocol operating on communication channels requiring an 8
data bit format (Settings Sheet 23 of 23).

i Manual Change Information Date Code 20020215
SEL-351R Instruction Manual
Revision
Date Summary of Revisions
Section 10:
- Added the BRE A and BRE W A serial port commands. These new
commands have the additional feature of displaying and preloading,
respectively, per-phase and ground trip operation counters.
Appendix B:
- Updated Firmware Upgrade Instructions.
Appendix I:
- Explained the MB8A and MB8B serial port protocol settings options for
MIRRORED BITS protocol operating on communication channels requiring an 8
data bit format.
990323 This revision includes the following changes:
Section 1:
- Changed logic in Figure 1.11 and Figure 1.12 to allow high current trips to
operate if auto-reclosing is nonexistent.
- Changed logic in bottom of Figure 1.23 to allow time-overcurrent pickups
51N1 and 51N2 to indicate ground current above Min. trip-ground level for the
drive-to-lockout logic (51N1 and 51N2 don’t have the built-in 2 cycle delay
that 50N6 has - thus, 51N1 and 51N2 are useful indication for instantaneous
trips).
- Changed logic in Figure 1.54 to allow time-overcurrent pickups 51N1 and
51N2 to indicate ground current above Min. trip-ground level for the fault-type
trip target LED “G.”
Section 3:
- Changed routing of Directional Control to Figure 3.8 (67N elements) and
Figures 3.16 and 3.17 (51NT elements)
Section 4:
- Added zero-sequence voltage polarized, neutral current directional elements to
Best Choice Ground Directional™ Logic.
- Inserted the following drawings:
Figure 4.7: Internal Enable (32NE) for Zero-Sequence Voltage-Polarized,
Neutral-Current Directional Element
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 20020215 Manual Change Information ii
SEL-351R Instruction Manual
Revision
Date Summary of Revisions
Section 8:
- Changed setting range for kA Interrupted set points KASP1, KASP2, and
KASP3 listed in Table 8.1 (new lower limit is 0.10 kA and new setting
increment is 0.01 kA).
Section 9:
- Settings Sheet 1 of 23: changed setting increment to 0.01 for CTR, CTRN,
PTR and PTRS settings.
- Settings Sheet 18 of 23: changed setting range for kA Interrupted set points
KASP1, KASP2, and KASP3 (new lower limit is 0.10 kA and new setting
increment is 0.01 kA).
Section 10:
- Changed factory default logic settings listed on page 10-32 for settings SV14
and LED24 (see preceding Section 1 references for corresponding Figure 1.23
and Figure 1.54).
Section 11:
- Corrected rotating display figures on the right-hand side of pages 11-7 through
11-9 (showing IA, IB, IC, and IN metering quantities as part of the “2 seconds
per screen”rotation).
Section 12:
- Corrected references to the number of available event reports, depending on
the length of event report format chosen: 15 or 30 cycles (twenty-eight 15-
cycle event reports or fourteen 30-cycle event reports).
Appendix F:
- Changed Figure F.1 to reflect the built-in minimum response time feature of
the 51QT negative-sequence time-overcurrent element.
Appendix H:
- Changed the setting range of setting UTIMEO to 1-50 seconds.
- Corrected the designation for the ECLASS setting in Table H.1.
981216 This revision includes the following changes:
- Updated references to figures in the SEL-351R Quick-Start Installation and
User’s Guide throughout manual (no date code change).
Section 1:
- Added Table 1.2 to clarify the function of the overcurrent elements when the
factory default EZ settings are active for a particular settings group.
- Clarified the function of EZ setting Close power wait time (corresponding
setting 79CLSD) in Reclose Supervision Logic.
- Added clarifying reference below Figure 1.51 in Front-Panel Status and Trip
Target LEDs.

iii Manual Change Information Date Code 20020215
SEL-351R Instruction Manual
Revision
Date Summary of Revisions
Section 3:
- Added clarifying reference to introduction and in Frequency Elements
subsection.
Section 4:
- Removed a Setting Description in Settings Ranges (under setting ZLR).
- Revised the example at the end of Apply Load-Encroachment to a Phase
Time-Overcurrent.
Section 7:
- Added clarifying reference in the Recloser Trip and Close Circuits.
- Expanded Figure 7.29 to show the 22000ìF capacitor in parallel with the
24 Vdc supply to the recloser trip and close circuitry.
Section 8:
- Changed battery amp-hour rating from 6.5 to 8.0 Ah (factory-shipped batteries
have changed as detailed in the Battery Replacement subsection in the Battery
section of the SEL-351R Quick-Start Installation and User’s Guide).
Note: The Battery Amp-hours setting was not changed in the factory-default
global settings listed in SHO Command (Show/View Settings) in Section 10:
Serial Port Communications and Commands –it remains at 6.5 Ah. This is a
conservative setting for the new 8.0 Ah batteries. The user can change the
Battery Amp-hours setting to 8.0 Ah, if desired.
981203 This revision includes the following changes:
- Corrected Figure 1.22 in Section 1: Factory-Set Logic.
- SELOGIC Control Equations torque control settings can no longer be set
directly to logical 0, as explained in the overcurrent element sections of
Section 3: Overcurrent, Voltage, Synchronism Check, Frequency, and
Power Elements and the SELOGIC Control Equations settings sheets in the
back of Section 9: Setting the SEL-351R Recloser Control.
- SELOGIC Control Equations drive-to-lockout setting 79DTL has a 60-cycle
dropout time, as explained in Section 6: Close and Reclose Logic.
- Corrected typographical error in Factory Settings Example in Section 6:
Close and Reclose Logic (no date code change).
- Corrected typographical error in Determining the Size of the Load Profile
Buffer in Section 8: Breaker/Recloser Monitor, Battery System Monitor,
metering, and Load Profile Functions (no date code change).
- More SELOGIC Control Equations settings limitations information added to
Appendix G: Setting SELOGIC Control Equations.

Date Code 20020215 Manual Change Information ix
SEL-351R Instruction Manual
Revision
Date Summary of Revisions
981103 This revision includes the following changes:
Section 1:
- Changed logic in Figure 1.6 and Figure 1.7 to allow fast curves to operate if
auto-reclosing is nonexistent (reissued entire section).
Section 3:
- Corrected phase time-overcurrent element pickup setting 51P1P in Table 3.3.
Section 4
- Updated Figure 4.2.
Section 6
- Updated Figure 6.1.
- Section 12:
- Corrected typographical error on page 12-4 (reissued entire section).
981021 This revision includes the following changes:
- New factory default SELOGIC®Control Equation setting 79RIS = 52A + 79CY
(reclose initiate supervision) explained in Section 6: Close and Reclose
Logic.
- SELOGIC Control Equation setting FAULT now momentarily suspends
demand metering updating and peak recording as explained in Section 8:
Breaker Monitor, Metering, and Load Profile Functions.
- Changed entry “Obj. 50, Var. 1, Time and Date”in Table H.2 in Appendix H:
Distributed Network Protocol (DNP) V3.00.
980710 New Manual Release.

Date Code 20020215 Table of Contents i
SEL-351R Instruction Manual
SEL-351R INSTRUCTION MANUAL
TABLE OF CONTENTS
SECTION 1: FACTORY-SET LOGIC
SECTION 2: ADDITIONAL INSTALLATION DETAILS
SECTION 3: OVERCURRENT, VOLTAGE, SYNCHRONISM CHECK, AND
FREQUENCY ELEMENTS
SECTION 4: LOSS-OF-POTENTIAL, LOAD ENCROACHMENT, AND
DIRECTIONAL ELEMENT LOGIC
SECTION 5: TRIP AND TARGET LOGIC
SECTION : CLOSE AND RECLOSE LOGIC
SECTION 7: INPUTS, OUTPUTS, TIMERS, AND OTHER CONTROL LOGIC
SECTION 8: BREAKER/RECLOSER MONITOR, BATTERY SYSTEM
MONITOR, METERING, AND LOAD PROFILE FUNCTIONS
SECTION 9: SETTING THE SEL-351R RECLOSER CONTROL
SECTION 10: SERIAL PORT COMMUNICATIONS AND COMMANDS
SECTION 11: ADDITIONAL FRONT-PANEL INTERFACE DETAILS
SECTION 12: STANDARD EVENT REPORTS AND SER
SECTION 13: TESTING AND TROUBLESHOOTING
SECTION 14: APPENDICES
Appendix A: Firmware Versions
Appendix B: Firmware Upgrade Instructions
Appendix C: SEL Distributed Port Switch Protocol
Appendix D: Configuration, Fast Meter, and Fast Operate Commands
Appendix E: Compressed ASCII Commands
Appendix F: Setting Negative-Sequence Overcurrent Elements
Appendix G: Setting SELOGIC® Control Equations
Appendix H: Distributed Network Protocol (DNP) V3.00
Appendix I: MIRRORED BITS™
SECTION 15: SEL-351R RECLOSER CONTROL COMMAND SUMMARY

Date Code 20020215 Factory-Set Logic i
SEL-351R Instruction Manual
TABLE OF CONTENTS
SECTION 1: FACTORY-SET LOGIC.....................................................1-1
Introduction.................................................................................................................................. 1-1
Factory Default Settings....................................................................................................... 1-1
Installation Variations and Logic Changes .......................................................................... 1-1
EZ Settings vs. “Regular” Settings ...................................................................................... 1-1
Overcurrent Element Functions Overview........................................................................... 1-4
Residual Ground vs. Neutral Ground................................................................................... 1-5
Cold Load Pickup Scheme........................................................................................................... 1-6
Enable Cold Load Pickup Scheme....................................................................................... 1-6
Start Loss of Load Diversity Timer ..................................................................................... 1-7
Actively Engage Cold Load Pickup Scheme (Phase Elements Example) ........................... 1-8
Use Overcurrent Element Torque Control Logic to Enable/Disable or Desensitize
Elements (Phase Elements Example)......................................................................... 1-10
Desensitize Delay Curve—Maintain Coordination (Phase Elements Example) ............... 1-10
Disengage Cold Load Pickup Scheme (Phase Elements Example)................................... 1-11
Other Cold Load Pickup Scheme Details Involving Ground and SEF Elements .............. 1-11
Fast Curve Operation Logic....................................................................................................... 1-11
Fast Curve Operation When Reclosing Is Defeated .......................................................... 1-12
Operations to Lockout, Activate High Current Trip, and Activate High Current Lockout
Logic................................................................................................................................... 1-14
High Current Trip Operation When Reclosing Is Defeated............................................... 1-15
Overcurrent Element Enable/Disable Logic .............................................................................. 1-20
Trip Logic .................................................................................................................................. 1-22
Close Logic ................................................................................................................................ 1-23
Close Conditions—Other Than Auto-Reclosing ............................................................... 1-23
Unlatch Close Conditions .................................................................................................. 1-24
Drive-to-Lockout Logic ............................................................................................................. 1-26
Operations to Lockout........................................................................................................ 1-26
High Current Lockout ........................................................................................................ 1-27
Other Drive-to-Lockout Conditions................................................................................... 1-27
Block Reset Timing ................................................................................................................... 1-30
Sequence Coordination .............................................................................................................. 1-31
Reclose Supervision Logic......................................................................................................... 1-33
Healthy Battery .................................................................................................................. 1-34
Present Close Power........................................................................................................... 1-34
Front-Panel AC SUPPLY LED.......................................................................................... 1-35
Installation With Only 120 Vac Power (Traditional Installation) ..................................... 1-37
120 Vac Close Power ................................................................................................. 1-37
Primary Voltage Close Power .................................................................................... 1-37
Installation With Separate 120 Vac Power and Three-Phase Voltage............................... 1-38
120 Vac Close Power ................................................................................................. 1-38
Primary Voltage Close Power .................................................................................... 1-38
Undervoltage Block for Frequency Elements ............................................................ 1-38

ii Factory-Set Logic Date Code 20020215
SEL-351R Instruction Manual
Installation With Separate 120 Vac Power, Three-Phase, and Synchronism Check
Voltage ....................................................................................................................... 1-38
120 Vac Close Power ................................................................................................. 1-39
Primary Voltage Close Power .................................................................................... 1-39
Undervoltage Block for Frequency Elements ............................................................ 1-39
Installation With Only Three-Phase Voltage (120 Vac Power Provided by Three-
Phase Voltage)............................................................................................................ 1-39
120 Vac Close Power ................................................................................................. 1-40
Primary Voltage Close Power .................................................................................... 1-40
Operator Control Logic.............................................................................................................. 1-40
Detailed Operator Control Pushbutton Output................................................................... 1-41
GROUND ENABLED Operator Control Pushbutton Output.................................... 1-42
Other Operator Control Pushbutton Outputs Operate Similarly to
GROUND ENABLED................................................................................ 1-42
LOCK Operator Control Pushbutton Output.............................................................. 1-42
TRIP and CLOSE Operator Control Pushbutton Outputs.......................................... 1-43
Corresponding Operator Control LEDs and Logic Applications....................................... 1-46
GROUND ENABLED Operator Control ................................................................... 1-46
Other Operator Controls ..................................................................................... 1-47
RECLOSE ENABLED Operator Control .................................................................. 1-48
REMOTE ENABLED Operator Control.................................................................... 1-48
Example Application for the REMOTE ENABLED Operator Control............. 1-49
AUX 1 and AUX 2 Operator Controls ....................................................................... 1-49
Example Application for the AUX 1 Operator Control (Hot Line Tag) ............ 1-50
ALTERNATE SETTINGS Operator Control ............................................................ 1-52
LOCK Operator Control............................................................................................. 1-53
Front-Panel Status and Trip Target LEDs ................................................................................. 1-53
TABLES
Table 1.1: Correspondence Between EZ Settings and “Regular”Settings.............................................. 1-2
Table 1.2: Overcurrent Element Functions With EZ Settings Operative ................................................ 1-4
Table 1.3: Conditions for Assertion of Relay Word Bits SH0 Through SH4........................................ 1-12
FIGURES
Figure 1.1: Loss of Load Diversity (top) and Restore Min. Trips (bottom) Logic for Cold Load
Pickup Scheme .............................................................................................................. 1-7
Figure 1.2: Cold Load Pickup Scheme Seal-In Logic for Phase Overcurrent Elements ....................... 1-8
Figure 1.3: Cold Load Pickup Scheme Seal-In Logic for Ground Overcurrent Elements..................... 1-9
Figure 1.4: Cold Load Pickup Scheme Seal-in Logic for SEF Overcurrent Elements .......................... 1-9
Figure 1.5: Disable Lower Portion of Delay Curve - Phase for Cold Load Pickup............................. 1-10
Figure 1.6: Operations - Phase Fast Curve Logic ................................................................................ 1-13
Figure 1.7: Operations - Ground Fast Curve Logic.............................................................................. 1-14
Figure 1.8: Operations to Lockout - Phase Logic ................................................................................ 1-15
Figure 1.9: Operations to Lockout - Ground Logic.............................................................................. 1-16
Figure 1.10: Operations to Lockout - SEF Logic................................................................................... 1-16

Date Code 20020215 Factory-Set Logic iii
SEL-351R Instruction Manual
Figure 1.11: Activate High Current Trip - Phase Logic......................................................................... 1-17
Figure 1.12: Activate High Current Trip - Ground Logic...................................................................... 1-18
Figure 1.13: Activate High Current Lockout - Phase Logic .................................................................. 1-19
Figure 1.14: Activate High Current Lockout - Ground Logic ............................................................... 1-19
Figure 1.15: Fast Curve - Phase (top) and Fast Curve - Ground (bottom) Enable/Disable Logic......... 1-20
Figure 1.16: Delay Curve - Phase (top) and Delay Curve - Ground (bottom) Enable/Disable
Logic............................................................................................................................ 1-21
Figure 1.17: High Current Trip (top) and High Current Lockout (bottom) Enable/Disable Logic ....... 1-21
Figure 1.18: SEF Element Enable/Disable Logic .................................................................................. 1-22
Figure 1.19: Trip Conditions .................................................................................................................. 1-23
Figure 1.20: Close Conditions—Other Than Auto-Reclosing ............................................................... 1-24
Figure 1.21: Unlatch Close Conditions .................................................................................................. 1-25
Figure 1.22: Recloser Status Determination .......................................................................................... 1-25
Figure 1.23: Drive-to-Lockout Logic—Part 1 of 3 ................................................................................ 1-28
Figure 1.24: Drive-to-Lockout Logic—Part 2 of 3 ................................................................................ 1-29
Figure 1.25: Drive-to-Lockout Logic—Part 3 of 3 ................................................................................ 1-30
Figure 1.26: Block Reset Timing Logic................................................................................................. 1-30
Figure 1.27: Sequence Coordination Logic............................................................................................ 1-31
Figure 1.28: Phase Coordination of SEL-351Rs in Series ..................................................................... 1-32
Figure 1.29: Operation of SEL-351R(1) Sequence Coordination Logic for Phase Fault Beyond
Downstream SEL-351R(2).......................................................................................... 1-33
Figure 1.30: Reclose Supervision Logic ................................................................................................ 1-34
Figure 1.31: Installation With Only 120 Vac Power (traditional installation)....................................... 1-35
Figure 1.32: Installation With Separate 120 Vac Power and Three-Phase Voltage .............................. 1-36
Figure 1.33: Installation With Separate 120 Vac Power, Three-Phase, and Synchronism Check
Voltage ........................................................................................................................ 1-36
Figure 1.34: Installation With Only Three-Phase Voltage (120 Vac power provided by three-
phase voltage).............................................................................................................. 1-37
Figure 1.35: Operator Controls—GROUND ENABLED Through LOCK ........................................... 1-41
Figure 1.36: Operator Controls—AUX 1 Through TRIP ...................................................................... 1-41
Figure 1.37: GROUND ENABLED Operator Control Pushbutton Output ........................................... 1-42
Figure 1.38: LOCK Operator Control Pushbutton Output ..................................................................... 1-43
Figure 1.39: CLOSE Operator Control Pushbutton Output ................................................................... 1-45
Figure 1.40: TRIP Operator Control Pushbutton Output ....................................................................... 1-46
Figure 1.41: GROUND ENABLED Operator Control LED and Logic Application............................. 1-47
Figure 1.42: RECLOSE ENABLED Operator Control LED and Logic Application............................ 1-48
Figure 1.43: REMOTE ENABLED Operator Control Logic Application............................................. 1-48
Figure 1.44: Example REMOTE ENABLED Operator Control Application (supervising remote
control of ground overcurrent elements)..................................................................... 1-49
Figure 1.45: AUX 1 Operator Control Logic Application ..................................................................... 1-49
Figure 1.46: AUX 2 Operator Control Logic Application ..................................................................... 1-50
Figure 1.47: Hot Line Tag Logic............................................................................................................ 1-51
Figure 1.48: Example AUX 1 Operator Control Application (local control of hot line tag)................. 1-51
Figure 1.49: ALTERNATE SETTINGS Operator Control LED and Logic Application...................... 1-52
Figure 1.50: LOCK Operator Control LED and Logic Application ...................................................... 1-53
Figure 1.51: Front-Panel Status LEDs ................................................................................................... 1-54
Figure 1.52: Front-Panel Trip Target LEDs........................................................................................... 1-55
Figure 1.53: Front-Panel Reclosing Relay Status LEDs ........................................................................ 1-55
Figure 1.54: Front-Panel Fault-Type Trip Target LEDs ........................................................................ 1-55

Date Code 20020215 Factory-Set Logic 1-1
SEL-351R Instruction Manual
SECTION 1: FACTORY-SET LOGIC
INTRODUCTION
This section describes the factory-set logic (SELOGIC®control equations, set with the SET L n
command) that makes the SEL-351R Recloser Control operate as a recloser control. Section 3:
Overcurrent, Voltage, Synchronism Check, and Frequency Elements through Section 9:
Setting the SEL-351R Recloser Control provide more settings information and settings variation
details. Important: Use this manual in conjunction with the SEL-351R Quick-Start Installation
and User’s Guide.
Factory Default Sett ngs
Factory default settings are listed under subsection SHO Command (Show/View Settings) in
Section 10: Serial Port Communications and Commands.
Installat on Var at ons and Log c Changes
For traditional recloser control installations (see Figure 1.31), none of the factory-set logic has to
be changed. However, for other recloser control installation variations (see Figure 1.32 through
Figure 1.34), some changes might be made to the factory-set logic, as detailed in the text
accompanying these figures. Also, if the SEL-351R were applied in “nonstandard”applications
(e.g., at a cogeneration interconnection point), changes would probably be made to the factory-
set logic. Section 9: Setting the SEL-351R Recloser Control provides details on making
settings changes.
EZ Sett ngs vs. “Regular” Sett ngs
The Settings section in the SEL-351R Quick-Start Installation and User’s Guide describes:
• EZ recloser control settings (set with SET EZ n command)
• EZ global settings (set with SET FZ command)
Section 9: Setting the SEL-351R Recloser Control describes:
• “regular”settings (set with SET n command)
• “regular”global settings (set with SET G command)
The EZ recloser control settings are a subset of the “regular”settings, but if the EZ recloser
control settings are enabled for a specific settings group n (n = 1–6), then the corresponding EZ
recloser control settings override and change certain “regular”settings for that settings group.
The EZ global settings override certain “regular”global settings if EZ recloser control settings
are enabled for at least settings group 1. Global setting EZGRPS determines if EZ recloser
control settings are enabled for a particular setting group.
The correlation between EZ recloser control settings and “regular”settings is given in Table 1.1.
The correlation between EZ global settings and “regular”global settings is also given at the end
of Table 1.1.

1-2 Factory-Set Logic Date Code 20020215
SEL-351R Instruction Manual
Table 1.1: Correspondence Between EZ Settings and “Regular” Settings
EZ Recloser Control Settings
(SHO EZ n Command; SET EZ n Command)
Corresponding “Regular” Settings
(SHO n Command; SET n Command)
Control Identifier (30 characters)
Circuit Identifier (30 characters)
RID
TID
CT Ratio
PT Ratio
CTR, CTRN
PTR, PTRS
Min. trip - phase
Min. trip - ground
Min. trip - SEF
51P1P, 51P2P, 50P4P, 50P6P
51G1P, 51G2P, 50G6P, 51N1P, 51N2P, 50N6P
50N3P, 50N4P
Fast curve - phase
Time dial - phase fast curve
EM reset - phase fast curve
51P1C
51P1TD
51P1RS
Fast curve - ground
Time dial - ground fast curve
EM reset - ground fast curve
51G1C, 51N1C
51G1TD, 51N1TD
51G1RS, 51N1RS
Delay curve - phase
Time dial - phase delay curve
EM reset - phase delay curve
51P2C
51P2TD
51P2RS
Delay curve - ground
Time dial - ground delay curve
EM reset - ground delay curve
51G2C, 51N2C
51G2TD, 51N2TD
51G2RS, 51N2RS
Time delay - SEF 67N3D
Operations - phase fast curve
Operations - ground fast curve
Operations to lockout - phase
Operations to lockout - ground
Operations to lockout - SEF
OPPH
OPGR
OPLKPH
OPLKGR
OPLKSF
Reclose interval 1
Reclose interval 2
Reclose interval 3
Reclose interval 4
790I1
790I2
790I3
790I4
Reset time for auto reclose
Reset time from lockout
Close power wait time
79RSD
79RSLD
79CLSD
Complex fast curve - phase (Y/N)
Const. time adder - phase fast curve
Vert. multiplier - phase fast curve
Min. response - phase fast curve
51P1CT
51P1TD
51P1MR