Schweitzer Engineering Laboratories SEL-311C User manual

20060320
SEL-311C Relay
Protection and
Automation System
Instruction Manual
*PM311C-01-NB*

SEL-311C Relay Instruction Manual Date Code 20060320
The relay contains devices sensitive to Electrostatic Discharge
(ESD). When working on the relay with the front panel removed,
work surfaces and personnel must be properly grounded or
equipment damage may result.
!
CAUTION
Do not use high-current interrupting output contacts to switch
ac control signals.
!
CAUTION
Carefully note the relay terminal polarity designations before
wiring high-current interrupting output contacts.
!
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.
!
CAUTION
Do not set SV4 (DLC) and SV5 (LLC) equal to a logical 1 at the
same time. This is an illegal condition in the SEL-221C, and will
cause misoperation of voltage supervised reclosing
!
CAUTION
Removal of this front panel exposes circuitry which may cause
electrical shock that can result in injury or death.
!
DANGER
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.
!
WARNING
Use only serial communications cables manufactured by SEL or
built to SEL specifications with the SEL-311C. Damage to the
relay or your communications equipment may result from the
use of incorrect communications connections.
!
WARNING
Le relais contient des pièces sensibles aux décharges
électrostatiques. Quand on travaille sur le relais avec les
panneaux avant ou du dessus enlevés, toutes les surfaces et le
personnel doivent être mis à la terre convenablement pour
éviter les dommages à l’équipement.
!
ATTENTION
Ne pas utiliser les contacts de sortie à haut pouvoir de coupure
pour commuter des signaux de commande de type CA.
!
ATTENTION
Prenez soigneusement note de l’identification de la polarité
sur le bornier du relais avant de raccorder les contacts de
sortie à haut pouvoir de coupure.
!
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.
!
ATTENTION
Ne pas mettre les variables SV4 (DLC) et SV5 (LLC) au UN
logique en même temps. Cette condition est interdite avec le
SEL-221C et causera une fausse opération du réenclenchement
supervisé par tension.
!
ATTENTION
Le retrait du panneau avant expose à la circuiterie qui pourrait
être la source de chocs électriques pouvant entraîner des
blessures ou la mort.
!
DANGER
Cet appareil 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 accés non-autorisé á l’équipement peut être
possible. SEL décline toute responsabilité pour tout dommage
résultant de cet accés non-autorisé.
!
AVERTISSEMENT
Utiliser uniquement les cables pour la communication série
fournis par SEL ou fabriqués conformément aux spécifications
de SEL avec le SEL-311C. Des dommages au relais ou à
l'équipement de communication pourraient résulter de l'usage
incorrect des raccordements de communication.
!
AVERTISSEMENT
© 1999–2003, 2005-2006 by Schweitzer Engineering Laboratories, Inc. All rights reserved.
All brand or product names appearing in this document are the trademark or registered trademark of their respective holders. No SEL
trademarks may be used without written permission. SEL products appearing in this document may be covered by US and Foreign patents.
Schweitzer Engineering Laboratories, Inc. reserves all rights and benefits afforded under federal and international copyright and patent laws in
its products, including without limitation software, firmware, and documentation.
The information in this manual is provided for informational use only and is subject to change without notice. Schweitzer Engineering
Laboratories, Inc. has approved only the English language manual.
This product is covered by the standard SEL 10-year warranty. For warranty details, visit www.selinc.com or contact your customer service
representative. PM311C-01

Date Code 20060320 Instruction Manual SEL-311C Relay
Table of Contents
List of Tables ....................................................................................................................................................... xi
List of Figures.................................................................................................................................................... xv
Preface................................................................................................................................................................. xxi
Manual Overview ............................................................................................................................................ xxi
Page Numbering .................................................................................................................................... xxiv
Conventions .................................................................................................................................................... xxv
Typographic Conventions ....................................................................................................................... xxv
Examples ................................................................................................................................................ xxv
Safety Information ................................................................................................................................. xxvi
Section 1: Introduction & Specifications
Overview ......................................................................................................................................................... 1.1
SEL-311C Models ........................................................................................................................................... 1.2
Applications..................................................................................................................................................... 1.3
AC/DC Connections ........................................................................................................................................ 1.4
Dual Terminal Labels .............................................................................................................................. 1.4
Output Contacts ....................................................................................................................................... 1.6
Communications Connections......................................................................................................................... 1.8
Specifications ................................................................................................................................................ 1.10
Section 2: Installation
Relay Mounting............................................................................................................................................... 2.1
Front- and Rear-Panel Diagrams ..................................................................................................................... 2.2
Making Rear-Panel Connections ................................................................................................................... 2.12
Wire-Alike Screw Terminal Connections .............................................................................................. 2.12
Power Supply ........................................................................................................................................ 2.12
Output Contacts ..................................................................................................................................... 2.12
Optoisolated Inputs ............................................................................................................................... 2.14
Current Transformer Inputs ................................................................................................................... 2.14
Potential Transformer Inputs ................................................................................................................. 2.14
Wye-Connected Voltages ...................................................................................................................... 2.14
Serial Ports ............................................................................................................................................ 2.14
IRIG-B Time-Code Input ...................................................................................................................... 2.15
SEL-311C AC/DC Connection Diagrams for Various Applications............................................................. 2.16
Circuit Board Connections ............................................................................................................................ 2.19
Accessing the Relay Circuit Boards ...................................................................................................... 2.19
Output Contact Jumpers ........................................................................................................................ 2.23
“Extra Alarm” Output Contact Control Jumper ....................................................................................2.23
Password and Breaker Jumpers ............................................................................................................. 2.24
EIA-232 Serial Port Voltage Jumpers ................................................................................................... 2.25
Clock Battery ......................................................................................................................................... 2.25
Section 3: Distance, Out-of-Step, Overcurrent, Voltage, Synchronism Check, and
Frequency Elements
Distance Elements ........................................................................................................................................... 3.1
Mho Phase Distance Elements ................................................................................................................ 3.1
Ground Distance Elements .................................................................................................................... 3.10
Distance Element Operating Time Curves at Nominal Frequency ............................................................... 3.16
Additional Distance Element Supervision ............................................................................................ 3.19
Zone 1 Extension ................................................................................................................................... 3.19
Zone Time Delay Elements ................................................................................................................... 3.20

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Table of Contents
Out-of-Step Characteristics............................................................................................................................3.22
Use SEL-321 Relay Application Guides for the SEL-311C .................................................................3.22
Instantaneous/Definite-Time Overcurrent Elements......................................................................................3.26
Phase Instantaneous/Definite-Time Overcurrent Elements ...................................................................3.26
Residual Ground Instantaneous/Definite-Time Overcurrent Elements .................................................3.28
Negative-Sequence Instantaneous/Definite-Time Overcurrent Elements .............................................3.30
Time-Overcurrent Elements...........................................................................................................................3.33
Phase Time-Overcurrent Elements ........................................................................................................3.33
Residual Ground Time-Overcurrent Element ........................................................................................3.36
Negative-Sequence Time-Overcurrent Element ....................................................................................3.38
Voltage Elements ...........................................................................................................................................3.40
Voltage Values .......................................................................................................................................3.40
Voltage Element Settings .......................................................................................................................3.40
Voltage Element Operation ....................................................................................................................3.42
Synchronism Check Elements .......................................................................................................................3.44
Fixed Angle Synchronism Check ..........................................................................................................3.44
Dynamic Synchronism Check ...............................................................................................................3.44
Synchronism Check Elements Settings .................................................................................................3.45
Synchronism Check Elements Voltage Inputs .......................................................................................3.48
Synchronism Check Elements Operation ..............................................................................................3.48
Synchronism Check Applications for Automatic Reclosing and Manual Closing ................................3.54
Frequency Elements.......................................................................................................................................3.55
Frequency Element Settings ..................................................................................................................3.55
Frequency Element Operation ...............................................................................................................3.58
Frequency Element Uses .......................................................................................................................3.59
Section 4: Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and
Directional Element Logic
Loss-of-Potential Logic ...................................................................................................................................4.1
Setting ELOP = Y or Y1 ..........................................................................................................................4.2
Setting ELOP = Y ....................................................................................................................................4.2
Setting ELOP = N ....................................................................................................................................4.3
CCVT Transient Detection Logic....................................................................................................................4.4
Load-Encroachment Logic ..............................................................................................................................4.5
Settings Ranges ........................................................................................................................................4.6
Load-Encroachment Setting Example .....................................................................................................4.6
Use SEL-321 Relay Application Guide for the SEL-311C .....................................................................4.8
Directional Control for Ground Distance and Residual Ground Overcurrent Elements .................................4.9
Directional Element Enables .................................................................................................................4.10
Best Choice Ground Directional Logic .................................................................................................4.10
Directional Elements .............................................................................................................................4.10
Directional Element Routing .................................................................................................................4.10
Directional Control for Phase Distance and Negative-Sequence Elements...................................................4.17
Internal Enables .....................................................................................................................................4.17
Directional Elements .............................................................................................................................4.17
Directional Element Routing .................................................................................................................4.18
Directional Control Settings ..........................................................................................................................4.21
Settings Made Automatically ................................................................................................................4.21
Settings ..................................................................................................................................................4.21
Overcurrent Directional Control Provided by Torque Control Settings ........................................................4.28
Section 5: Trip and Target Logic
Trip Logic ........................................................................................................................................................5.1
Set Trip ....................................................................................................................................................5.3
Unlatch Trip .............................................................................................................................................5.4
Factory Settings Example (Using Setting TR) ........................................................................................5.4
Additional Settings Examples .................................................................................................................5.5
Program an Output Contact for Tripping .................................................................................................5.6

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Date Code 20060320 Instruction Manual SEL-311C Relay
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Switch-Onto-Fault Trip Logic ......................................................................................................................... 5.7
Three-Pole Open Logic ........................................................................................................................... 5.8
Circuit Breaker Operated Switch-Onto-Fault Logic ...............................................................................5.8
Close Bus Operated Switch-Onto-Fault Logic ........................................................................................ 5.9
Switch-Onto-Fault Logic Output (SOTFE) ............................................................................................. 5.9
Switch-Onto-Fault Trip Logic Trip Setting (TRSOTF) .......................................................................... 5.9
Communications-Assisted Trip Logic-General Overview ............................................................................ 5.10
Enable Setting ECOMM ....................................................................................................................... 5.10
Trip Setting TRCOMM ......................................................................................................................... 5.11
Trip Settings TRSOTF and TR .............................................................................................................. 5.11
Trip Setting DTT ................................................................................................................................... 5.11
Use Existing SEL-321 Relay Application Guides for the SEL-311C Relay ........................................ 5.12
Permissive Overreaching Transfer Trip Logic .............................................................................................. 5.13
Use Existing SEL-321 Relay POTT Application Guide for the SEL-311C ......................................... 5.13
External Inputs ...................................................................................................................................... 5.13
Timer Settings ....................................................................................................................................... 5.14
Logic Outputs ........................................................................................................................................ 5.14
Weak-Infeed Logic and Settings.................................................................................................................... 5.15
SEL-311C Weak-Infeed Logic .............................................................................................................. 5.15
Variations for Permissive Underreaching Transfer Trip (PUTT) Scheme ............................................ 5.17
Installation Variations ............................................................................................................................ 5.17
Directional Comparison Unblocking Logic .................................................................................................. 5.19
Use Existing SEL-321 DCUB Application Guide for the SEL-311C .................................................. 5.19
External Inputs ...................................................................................................................................... 5.19
Timer Settings ....................................................................................................................................... 5.20
Logic Outputs ........................................................................................................................................ 5.20
Installation Variations ............................................................................................................................ 5.23
Directional Comparison Blocking Logic....................................................................................................... 5.25
Use Existing SEL-321 DCB Application Guide for the SEL-311C ..................................................... 5.25
External Inputs ...................................................................................................................................... 5.25
Timer Settings ....................................................................................................................................... 5.25
Logic Outputs ........................................................................................................................................ 5.26
Installation Variations ............................................................................................................................ 5.28
Front-Panel Target LEDs............................................................................................................................... 5.31
Additional Target LED Information ...................................................................................................... 5.31
{TARGET RESET/LAMP TEST} Front-Panel Pushbutton ................................................................. 5.33
Section 6: Close and Reclose Logic
Overview ......................................................................................................................................................... 6.1
Close Logic ............................................................................................................................................. 6.1
Reclose Supervision Logic ...................................................................................................................... 6.1
Reclose Logic .......................................................................................................................................... 6.1
Close Logic...................................................................................................................................................... 6.2
Set Close .................................................................................................................................................. 6.2
Unlatch Close .......................................................................................................................................... 6.3
Factory Settings Example ........................................................................................................................ 6.3
Defeat the Close Logic ............................................................................................................................ 6.4
Circuit Breaker Status ............................................................................................................................. 6.4
Program an Output Contact for Closing .................................................................................................. 6.4
Reclose Supervision Logic .............................................................................................................................. 6.5
Settings and General Operation ............................................................................................................... 6.6
Settings Example ..................................................................................................................................... 6.8
Additional Settings Example 1 ................................................................................................................ 6.8
Additional Settings Example 2 .............................................................................................................. 6.10
Reclosing Relay............................................................................................................................................. 6.11
Reclosing Relay States and General Operation .....................................................................................6.11
Reclosing Relay States After a Settings or Setting Group Change ....................................................... 6.13
Defeat the Reclosing Relay ................................................................................................................... 6.13

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SEL-311C Relay Instruction Manual Date Code 20060320
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Reclosing Relay Timer Settings ............................................................................................................6.14
Reclosing Relay Shot Counter ...............................................................................................................6.16
Reclosing Relay SELOGIC Control Equation Settings Overview ..........................................................6.17
Reclose Initiate and Reclose Initiate Supervision Settings (79RI and 79RIS, Respectively) ...............6.17
Drive-to-Lockout and Drive-to-Last Shot Settings (79DTL and 79DLS, Respectively) ......................6.19
Skip Shot and Stall Open Interval Timing Settings (79SKP and 79STL, Respectively) .......................6.21
Block Reset Timing Setting (79BRS) ....................................................................................................6.23
Sequence Coordination Setting (79SEQ) ..............................................................................................6.24
Section 7: Inputs, Outputs, Timers, and Other Control Logic
Overview..........................................................................................................................................................7.1
Optoisolated Inputs ..........................................................................................................................................7.3
Input Debounce Timers ...........................................................................................................................7.4
Input Functions ........................................................................................................................................7.4
Settings Example 1 ..................................................................................................................................7.5
Local Control Switches....................................................................................................................................7.7
Local Control Switch Types ....................................................................................................................7.7
Settings Examples ....................................................................................................................................7.9
Additional Local Control Switch Application Ideas .............................................................................7.10
Local Control Switch States Retained ...................................................................................................7.10
Remote Control Switches ..............................................................................................................................7.11
Remote Bit Application Ideas ................................................................................................................7.11
Remote Bit States Not Retained When Power Is Lost ..........................................................................7.11
Remote Bit States Retained When Settings Changed or Active Setting Group Changed .....................7.11
Latch Control Switches..................................................................................................................................7.13
Latch Control Switch Application Ideas ................................................................................................7.14
Reclosing Relay Enable/Disable Setting Example ................................................................................7.14
Latch Control Switch States Retained ...................................................................................................7.16
Reset Latch Bits for Active Setting Group Change ...............................................................................7.17
Make Latch Control Switch Settings With Care ...................................................................................7.17
Multiple Setting Groups.................................................................................................................................7.19
Active Setting Group Indication ............................................................................................................7.19
Selecting the Active Setting Group .......................................................................................................7.19
Operation of SELOGIC Control Equation Settings SS1–SS6 .................................................................7.19
Operation of Settings SS1–SS6 .............................................................................................................7.20
Operation of Serial Port GROUP Command and Front-Panel {GROUP} Pushbutton .........................7.20
Relay Disabled Momentarily During Active Setting Group Change ....................................................7.20
Active Setting Group Switching Example 1 ..........................................................................................7.20
Active Setting Group Switching Example 2 ..........................................................................................7.23
Active Setting Group Retained ..............................................................................................................7.26
Make Active Setting Group Switching Settings With Care ...................................................................7.27
SELOGIC Control Equation Variables/Timers................................................................................................7.28
Settings Example ...................................................................................................................................7.29
Additional Settings Example 1 ..............................................................................................................7.29
Additional Settings Example 2 ..............................................................................................................7.30
Timers Reset When Power Is Lost, Settings Are Changed, or Active Setting Group Is Changed ........7.30
Output Contacts .............................................................................................................................................7.32
Factory Settings Example ......................................................................................................................7.32
Operation of Output Contacts for Different Output Contact Types .......................................................7.32
Rotating Default Display (Only on Models With LCD)................................................................................7.36
Traditional Indicating Panel Lights .......................................................................................................7.36
Traditional Indicating Panel Lights Replaced With Rotating Default Display .....................................7.36
General Operation of Rotating Default Display Settings ......................................................................7.37
Settings Examples ..................................................................................................................................7.37
Additional Settings Examples ...............................................................................................................7.39
Active Setting Group Switching Considerations ...................................................................................7.40
Additional Rotating Default Display Example ......................................................................................7.41
Displaying Time-Overcurrent Elements on the Rotating Default Display ............................................7.41

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Date Code 20060320 Instruction Manual SEL-311C Relay
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Displaying Time-Overcurrent Elements Example ................................................................................ 7.42
Displaying Metering Quantities on the Rotating Default Display ........................................................ 7.43
Displaying Metering Values Example ................................................................................................... 7.46
Displaying Breaker Monitor Output Information on the Rotating Default Display ............................. 7.46
Displaying Breaker Monitor Outputs Example .....................................................................................7.47
Section 8: Breaker Monitor and Metering Functions
Overview ......................................................................................................................................................... 8.1
Breaker Monitor .............................................................................................................................................. 8.2
Breaker Monitor Setting Example ........................................................................................................... 8.4
Breaker Monitor Operation Example ...................................................................................................... 8.6
Breaker Monitor Output ........................................................................................................................ 8.11
View or Reset Breaker Monitor Information ........................................................................................ 8.12
Determination of Relay-Initiated Trips and Externally Initiated Trips ................................................. 8.13
Station DC Battery Monitor .......................................................................................................................... 8.15
DC Under- and Overvoltage Elements .................................................................................................. 8.15
Create Desired Logic for DC Under- and Overvoltage Alarming ........................................................ 8.15
Additional Application .......................................................................................................................... 8.17
View Station DC Battery Voltage .......................................................................................................... 8.17
Analyze Station DC Battery Voltage ..................................................................................................... 8.17
Operation of Station DC Battery Monitor When AC Voltage Is Powering the Relay .......................... 8.19
Demand Metering.......................................................................................................................................... 8.20
Comparison of Thermal and Rolling Demand Meters .......................................................................... 8.20
Demand Meter Settings ......................................................................................................................... 8.24
Demand Current Logic Output Application–Raise Pickup for Unbalance Current .............................. 8.25
View or Reset Demand Metering Information ......................................................................................8.26
Demand Metering Updating and Storage .............................................................................................. 8.27
Energy Metering............................................................................................................................................ 8.28
View or Reset Energy Metering Information ........................................................................................ 8.28
Energy Metering Updating and Storage ................................................................................................ 8.28
Maximum/Minimum Metering...................................................................................................................... 8.29
View or Reset Maximum/Minimum Metering Information .................................................................. 8.29
Maximum/Minimum Metering Updating and Storage .......................................................................... 8.29
Synchrophasor Metering ............................................................................................................................... 8.31
Section 9: Setting the Relay
Overview ......................................................................................................................................................... 9.1
Settings Changes Via the Front Panel ............................................................................................................. 9.2
Settings Changes Via the Serial Port............................................................................................................... 9.3
Time-Overcurrent Curves................................................................................................................................ 9.5
Relay Word Bits (Used in SELOGIC Control Equations) .............................................................................. 9.16
Settings Explanations .................................................................................................................................... 9.33
Identifier Labels .................................................................................................................................... 9.33
Current Transformer Ratios ................................................................................................................... 9.33
Line Settings .......................................................................................................................................... 9.33
Enable Settings ...................................................................................................................................... 9.34
Other System Parameters ...................................................................................................................... 9.34
Settings Sheets............................................................................................................................................... 9.35
Settings Sheets for the SEL-311C Relay
Section 10: Serial Port Communications and Commands
Overview ....................................................................................................................................................... 10.1
Port Connector and Communications Cables................................................................................................ 10.2
IRIG-B ................................................................................................................................................... 10.2
Relay Word Bit TIRIG .......................................................................................................................... 10.3
Relay Word Bit TSOK .......................................................................................................................... 10.3
SEL-311C to Computer ......................................................................................................................... 10.3
SEL-311C to Modem or Other DCE ..................................................................................................... 10.3

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SEL-311C to SEL Communications Processor or SEL-2100 ...............................................................10.4
SEL-311C to SEL-DTA2 .......................................................................................................................10.4
SEL-311C to SEL-PRTU .......................................................................................................................10.4
Communications Protocols ............................................................................................................................10.6
Hardware Protocol .................................................................................................................................10.6
Software Protocols .................................................................................................................................10.6
Serial Port Automatic Messages....................................................................................................................10.9
SEL-DTA Protocol ................................................................................................................................10.9
Serial Port Access Levels.............................................................................................................................10.10
Access Level 0 .....................................................................................................................................10.10
Access Level 1 .....................................................................................................................................10.10
Access Level B ....................................................................................................................................10.11
Access Level 2 .....................................................................................................................................10.11
Command Summary ....................................................................................................................................10.12
Command Explanations ...............................................................................................................................10.14
Access Level 0 Commands ..................................................................................................................10.14
Access Level 1 Commands ..................................................................................................................10.15
Access Level B Commands .................................................................................................................10.34
Access Level 2 Commands ..................................................................................................................10.37
SEL-311C Relay Command Summary
Section 11: Front-Panel Interface (Only on Models With LCD)
Overview........................................................................................................................................................11.1
Front-Panel Pushbutton Operation.................................................................................................................11.2
Overview ................................................................................................................................................11.2
Primary Functions ..................................................................................................................................11.2
Secondary Functions ..............................................................................................................................11.4
Functions Unique to the Front-Panel Interface..............................................................................................11.6
Reclosing Relay Shot Counter Screen ...................................................................................................11.6
Local Control .........................................................................................................................................11.8
Rotating Default Display .............................................................................................................................11.12
Scroll Lock Control of Front Panel LCD ............................................................................................11.15
Stop Scrolling (Lock) ..........................................................................................................................11.15
Restart Scrolling (Unlock) ...................................................................................................................11.15
Single Step ...........................................................................................................................................11.15
Exit .......................................................................................................................................................11.15
Cancel ..................................................................................................................................................11.16
Additional Rotating Default Display Example ....................................................................................11.16
Section 12: Standard Event Reports and SER
Overview........................................................................................................................................................12.1
Standard 15/30/60/180-Cycle Event Reports.................................................................................................12.2
Event Report Length (Settings LER and PRE) ......................................................................................12.2
Standard Event Report Triggering .........................................................................................................12.2
Event Summary .....................................................................................................................................12.3
Retrieving Full-Length Standard Event Reports ...................................................................................12.6
Synchrophasor-Level Accuracy in Event Reports .................................................................................12.7
Compressed ASCII Event Reports ........................................................................................................12.8
Filtered and Unfiltered Event Reports ...................................................................................................12.8
Clearing Standard Event Report Buffer .................................................................................................12.9
Standard Event Report Column Definitions ..........................................................................................12.9
Example Standard 15-Cycle Event Report ..................................................................................................12.19
Sequential Events Recorder (SER) Report ..................................................................................................12.28
SER Triggering ....................................................................................................................................12.28
Making SER Trigger Settings ..............................................................................................................12.28
Make SER Settings With Care .............................................................................................................12.28
Retrieving SER Reports .......................................................................................................................12.28

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Clearing SER Report ........................................................................................................................... 12.30
Example Sequential Events Recorder (SER) Report................................................................................... 12.31
Section 13: Testing and Troubleshooting
Overview ....................................................................................................................................................... 13.1
Testing Philosophy ........................................................................................................................................ 13.2
Acceptance Testing ............................................................................................................................... 13.2
Commissioning Testing ......................................................................................................................... 13.2
Maintenance Testing ............................................................................................................................. 13.3
Testing Methods and Tools............................................................................................................................ 13.5
Test Features Provided by the Relay ..................................................................................................... 13.5
Low-Level Test Interface ....................................................................................................................... 13.6
Test Methods ......................................................................................................................................... 13.6
Relay Testing ................................................................................................................................................. 13.9
Equipment Required .............................................................................................................................. 13.9
Checkout Procedure .............................................................................................................................. 13.9
Output Contact Explanation ................................................................................................................ 13.14
Target LED Explanation ...................................................................................................................... 13.14
Front-Panel LCD Explanation ............................................................................................................. 13.14
Test Setup .................................................................................................................................................... 13.15
Test Source Connections ..................................................................................................................... 13.15
Serial Communications Equipment Connections ................................................................................ 13.19
Test Procedures............................................................................................................................................ 13.20
Overcurrent Elements .......................................................................................................................... 13.20
Negative-Sequence Directional Element ............................................................................................. 13.22
Phase Mho Distance Elements ............................................................................................................ 13.33
Ground Mho Distance Elements ......................................................................................................... 13.39
Troubleshooting Test Results ...................................................................................................................... 13.56
Relay Self-Tests........................................................................................................................................... 13.58
Relay Troubleshooting ................................................................................................................................ 13.60
Inspection Procedure ........................................................................................................................... 13.60
Relay Calibration......................................................................................................................................... 13.61
Factory Assistance....................................................................................................................................... 13.62
Section 14: Application Settings for SEL-221 Series Relays
Overview ....................................................................................................................................................... 14.1
SEL-221G to SEL-311C Settings Conversion Guide.................................................................................... 14.2
Key Differences Between the SEL-221G and the SEL-311C ............................................................... 14.3
Application Settings .............................................................................................................................. 14.3
Convert SEL-221G Primary Quantities to SEL-311C Secondary Quantities ....................................... 14.4
Convert SEL-221G Relay Settings to SEL-311C Settings .................................................................... 14.4
Convert SEL-221G Output Mask Logic Settings to SELOGIC Control Equations ............................... 14.6
SEL-221G-5 to SEL-311C Settings Conversion Guide .............................................................................. 14.10
Key Differences Between the SEL-221G-5 and the SEL-311C ......................................................... 14.11
Application Settings ............................................................................................................................ 14.11
Convert SEL-221G-5 Primary Quantities to SEL-311C Secondary Quantities .................................. 14.12
Convert SEL-221G-5 Settings to SEL-311C Settings ......................................................................... 14.12
Convert SEL-221G-5 Output Mask Logic Settings to SELOGIC Control Equations .......................... 14.14
SEL-221H to SEL-311C Settings Conversion Guide..................................................................................14.18
Application Settings ............................................................................................................................ 14.19
Convert SEL-221H Primary Quantities to SEL-311C Secondary Quantities ..................................... 14.19
Convert SEL-221H Settings to SEL-311C Settings ............................................................................ 14.19
Convert SEL-221H Output Mask Logic Settings to SELOGIC Control Equations ............................. 14.21
SEL-221F to SEL-311C Settings Conversion Guide ..................................................................................14.25
Application Settings ............................................................................................................................ 14.26
Convert SEL-221F Primary Quantities to SEL-311C Secondary Quantities ...................................... 14.26
Convert SEL-221F Settings to SEL-311C Settings ............................................................................. 14.26
Convert SEL-221F Output Mask Logic Settings to SELOGIC Control Equations .............................. 14.28

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SEL-221F-3 to SEL-311C Settings Conversion Guide ...............................................................................14.32
Application Settings ............................................................................................................................14.33
Convert SEL-221F-3 Primary Quantities to SEL-311C Secondary Quantities ...................................14.33
Convert SEL-221F-3 Settings to SEL-311C Settings ..........................................................................14.33
Convert SEL-221F-3 Output Mask Logic Settings to SELOGIC Control Equations ...........................14.35
SEL-221C to SEL-311C Settings Conversion Guide ..................................................................................14.39
Application Settings ............................................................................................................................14.40
Convert SEL-221C Primary Quantities to SEL-311C Secondary Quantities ......................................14.40
Convert SEL-221C Settings to SEL-311C Settings ............................................................................14.40
Convert SEL-221C Output Mask Logic Settings to SELOGIC Control Equations ..............................14.43
SEL-221-16 to SEL-311C Settings Conversion Guide................................................................................14.47
Application Settings ............................................................................................................................14.48
Convert SEL-221-16 Primary Quantities to SEL-311C Secondary Quantities ...................................14.48
Convert SEL-221-16 Settings to SEL-311C Settings ..........................................................................14.48
Convert SEL-221-16 Output Mask Logic Settings to SELOGIC Control Equations ...........................14.50
SEL-2PG10 to SEL-311C Settings Conversion Guide................................................................................14.53
Application Settings ............................................................................................................................14.54
Convert SEL-2PG10 Primary Quantities to SEL-311C Secondary Quantities ...................................14.54
Convert SEL-2PG10 Settings to SEL-311C Settings ..........................................................................14.54
Convert SEL-2PG10 Output Mask Logic Settings to SELOGIC Control Equations ............................14.56
SEL-311C Settings Sheet Application Setting 221G
SEL-311C Settings Sheet Application Setting 221G-5
SEL-311C Settings Sheet Application Setting 221H
SEL-311C Settings Sheet Application Setting 221F
SEL-311C Settings Sheet Application Setting 221F-3
SEL-311C Settings Sheet Application Setting 221C
SEL-311C Settings Sheet Application Setting 221-16
SEL-311C Settings Sheet Application Setting 2PG10
Appendix A: Firmware and Instruction Manual Versions
Firmware .........................................................................................................................................................A.1
Determining the Firmware Version in Your Relay .................................................................................A.1
Instruction Manual..........................................................................................................................................A.5
Appendix B: Firmware Upgrade Instructions
Overview ................................................................................................................................................. B.1
Upgrade Procedure ................................................................................................................................. B.2
Failure to Connect ................................................................................................................................... B.5
Factory Assistance ................................................................................................................................ B.17
Appendix C: SEL Distributed Port Switch Protocol (LMD)
Overview......................................................................................................................................................... C.1
Settings............................................................................................................................................................ C.2
Operation ........................................................................................................................................................ C.3
Appendix D: Configuration, Fast Meter, and Fast Operate Commands
Overview.........................................................................................................................................................D.1
Message Lists..................................................................................................................................................D.2
Binary Message List ...............................................................................................................................D.2
ASCII Configuration Message List ........................................................................................................D.2
Message Definitions........................................................................................................................................D.3
A5C0 Relay Definition Block ................................................................................................................D.3
A5C1 Fast Meter Configuration Block ...................................................................................................D.3

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Date Code 20060320 Instruction Manual SEL-311C Relay
Table of Contents
A5D1 Fast Meter Data Block ................................................................................................................. D.5
A5C2/A5C3 Demand/Peak Demand Fast Meter Configuration Messages ............................................ D.5
A5D2/A5D3 Demand/Peak Demand Fast Meter Message .................................................................... D.8
A5B9 Fast Meter Status Acknowledge Message ................................................................................... D.8
A5CE Fast Operate Configuration Block ............................................................................................... D.9
A5E0 Fast Operate Remote Bit Control ............................................................................................... D.10
A5E3 Fast Operate Breaker Control .................................................................................................... D.11
A5CD Fast Operate Reset Definition Block ........................................................................................ D.11
A5ED Fast Operate Reset Command ................................................................................................... D.12
ID Message ........................................................................................................................................... D.12
DNA Message ...................................................................................................................................... D.12
BNA Message ....................................................................................................................................... D.13
SNS Message ........................................................................................................................................ D.14
Appendix E: Compressed ASCII Commands
Overview .........................................................................................................................................................E.1
CASCII Command—General Format .............................................................................................................E.2
CASCII Command—SEL-311C .....................................................................................................................E.4
CSTATUS Command—SEL-311C .................................................................................................................E.6
CHISTORY Command—SEL-311C...............................................................................................................E.7
CEVENT Command—SEL-311C...................................................................................................................E.8
CSU Command—SEL-311C.........................................................................................................................E.11
Appendix F: Setting Negative-Sequence Overcurrent Elements
Setting Negative-Sequence Definite-Time Overcurrent Elements .................................................................. F.1
Setting Negative-Sequence Time-Overcurrent Elements ................................................................................ F.2
Other Negative-Sequence Overcurrent Element References........................................................................... F.3
Appendix G: SEL Synchrophasors
Overview ........................................................................................................................................................ G.1
Introduction .................................................................................................................................................... G.2
Synchrophasor Measurement ......................................................................................................................... G.3
External Equipment Compensation................................................................................................................ G.4
Protocol Operation.......................................................................................................................................... G.5
Transmit Mode Control .......................................................................................................................... G.5
Settings ........................................................................................................................................................... G.8
Descriptions of Synchrophasor Settings ................................................................................................ G.9
Synchrophasor Relay Word Bits................................................................................................................... G.11
View Synchrophasors by Using the MET PM Command............................................................................ G.12
Communications Bandwidth ........................................................................................................................ G.14
Appendix H: Setting SELOGIC Control Equations
Overview ........................................................................................................................................................ H.1
Relay Word Bits.............................................................................................................................................. H.2
Relay Word Bit Operation Example–Phase Time-Overcurrent Element 51PT ..................................... H.2
Other Relay Word Bits ........................................................................................................................... H.3
SELOGIC Control Equations........................................................................................................................... H.4
SELOGIC Control Equation Operators ....................................................................................................H.4
All SELOGIC Control Equations Must Be Set ........................................................................................ H.8
SELOGIC Control Equation Limitations ................................................................................................. H.9
Processing Order and Processing Interval.................................................................................................... H.10
Appendix I: DNP Communications
Overview ..........................................................................................................................................................I.1
Configuration....................................................................................................................................................I.2
Data-Link Operation.........................................................................................................................................I.4
Data Access Method.........................................................................................................................................I.5
DNP3 Documentation ......................................................................................................................................I.6
Device Profile ...........................................................................................................................................I.6
Object Table .............................................................................................................................................I.7

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SEL-311C Relay Instruction Manual Date Code 20060320
Table of Contents
Data Map ............................................................................................................................................... I.10
Relay Summary Event Data ................................................................................................................... I.14
Point Remapping............................................................................................................................................ I.15
Settings Sheet—DNP Port—Set P
Appendix J: MIRRORED BITS Communications
Overview.......................................................................................................................................................... J.1
Operation ......................................................................................................................................................... J.2
Message Transmission ............................................................................................................................. J.2
Message Decoding and Integrity Checks ................................................................................................ J.2
Synchronization ....................................................................................................................................... J.3
Loopback Testing ..................................................................................................................................... J.3
Channel Monitoring ................................................................................................................................. J.3
MIRRORED BITS Protocol for the Pulsar 9600 Baud Modem .......................................................................... J.5
Settings............................................................................................................................................................. J.6
Appendix K: Unsolicited Fast SER Protocol
Introduction.....................................................................................................................................................K.1
Make Sequential Events Recorder (SER) Settings With Care........................................................................K.2
Recommended Message Usage ......................................................................................................................K.3
Functions and Function Codes........................................................................................................................K.4
01-Function Code: Enable Unsolicited Data Transfer, Sent From Master to Relay ..............................K.4
02-Function Code: Disable Unsolicited Data Transfer, Sent From Master to Relay .............................K.5
18-Function: Unsolicited Fast SER Response, Sent From Relay to Master ...........................................K.5
Acknowledge Message Sent From Master to Relay, and From Relay to Master ...................................K.7
Appendix L: ACSELERATOR QuickSet SEL-5030 Software
Overview......................................................................................................................................................... L.1
ACSELERATOR QuickSet System Requirements ............................................................................................ L.2
Installation ...................................................................................................................................................... L.3
Starting the ACSELERATOR QuickSet Software ............................................................................................. L.4

Date Code 20060320 Instruction Manual SEL-311C Relay
List of Tables
Table 1.1 SEL-311C Models.................................................................................................................. 1.2
Table 2.1 Communications Cables to Connect the SEL-311C to Other Devices ................................ 2.15
Table 2.2 Output Contact Jumpers and Corresponding Output Contacts ............................................ 2.23
Table 2.3 Move Jumper JMP 23 to Select Extra Alarm....................................................................... 2.24
Table 2.4 Password and Breaker Jumper Operation ............................................................................ 2.24
Table 2.5 EIA-232 Serial Port Voltage Jumper Positions for Standard Relay Shipments ................... 2.25
Table 3.1 Phase Distance Calculations................................................................................................... 3.2
Table 3.2 Distance Elements Settings .................................................................................................... 3.6
Table 3.3 Ground Distance Elements Settings..................................................................................... 3.10
Table 3.4 Zone 1 Settings..................................................................................................................... 3.19
Table 3.5 Zone Timing Settings ........................................................................................................... 3.20
Table 3.6 Out-of-Step Settings............................................................................................................. 3.22
Table 3.7 OOS Relay Word Bits .......................................................................................................... 3.23
Table 3.8 Available Phase Time-Overcurrent Elements....................................................................... 3.33
Table 3.9 Phase Time-Overcurrent Element (Maximum Phase) Settings............................................ 3.33
Table 3.10 Phase Time-Overcurrent Element (Maximum Phase) Logic Outputs.................................. 3.34
Table 3.11 Residual Ground Time-Overcurrent Element Settings......................................................... 3.37
Table 3.12 Negative-Sequence Time-Overcurrent Element Settings..................................................... 3.38
Table 3.13 Voltage Values Used by Voltage Elements........................................................................... 3.40
Table 3.14 Voltage Elements Settings and Settings Ranges .................................................................. 3.40
Table 3.15 Synchronism Check Elements Settings and Settings Ranges .............................................. 3.45
Table 3.16 Frequency Elements Settings and Settings Ranges.............................................................. 3.57
Table 4.1 Load-Encroachment Logic Settings Ranges .......................................................................... 4.6
Table 4.2 Elements Controlled by Zone/Level Direction Settings (Corresponding
Overcurrent and Directional Element Figure Numbers in Parentheses)............................. 4.21
Table 4.3 First Entry in ORDER Setting if Ground Quadrilateral Distance Elements Are Used........ 4.23
Table 4.4 Torque Control Settings and Elements................................................................................. 4.28
Table 5.1 SEL-311C Front-Panel Target LED Definitions .................................................................. 5.31
Table 6.1 Relay Word Bit and Front-Panel Correspondence to Reclosing Relay States ..................... 6.12
Table 6.2 Reclosing Relay Timer Settings and Setting Ranges ........................................................... 6.14
Table 6.3 Relay Word Bits Used to Monitor Open Interval and Reset Timing.................................... 6.16
Table 6.4 Shot Counter Correspondence to Relay Word Bits and Open Interval Times ..................... 6.17
Table 6.5 Reclosing Relay SELOGIC Control Equation Settings Example.......................................... 6.17
Table 6.6 Open Interval Time Settings Example ................................................................................. 6.22
Table 7.1 Correspondence Between Local Control Switch Positions and Label Settings ..................... 7.7
Table 7.2 Correspondence Between Local Control Switch Types and Required Label Settings........... 7.8
Table 7.3 Local Bits LB3 and LB4 Used for Manual Trip and Close Functions................................... 7.9
Table 7.4 Definitions for Active Setting Group Indication Relay Word Bits SG1–SG6 ..................... 7.19
Table 7.5 Definitions for Active Setting Group Switching
SELOGIC Control Equation Settings SS1–SS6 ................................................................... 7.19
Table 7.6 SELOGIC Control Equation Settings for Switching
Active Setting Group Between Setting Groups 1 and 4...................................................... 7.21
Table 7.7 Active Setting Group Switching Input Logic....................................................................... 7.23
Table 7.8 SELOGIC Control Equation Settings for Rotating
Selector Switch Active Setting Group Switching ............................................................... 7.24
Table 7.9 Settings for Displaying Time-Overcurrent Elements........................................................... 7.42
Table 7.10 Relay Setting Variables ........................................................................................................ 7.43
Table 7.11 Mnemonic Settings for Metering on the Rotating Default Display ..................................... 7.44
Table 7.12 Settings for Displaying Metering Values Example .............................................................. 7.46
Table 7.13 Mnemonic Settings for Self-Check Status on the Rotating Default Display ....................... 7.47
Table 7.14 Settings for Displaying Breaker Monitor Outputs Example ................................................ 7.47
Table 8.1 Breaker Maintenance Information for an Example Circuit Breaker ...................................... 8.2
Table 8.2 Breaker Monitor Settings and Settings Ranges...................................................................... 8.4
Table 8.3 Breaker Monitor Output Relay Word Bits ........................................................................... 8.12

xii List of Tables
SEL-311C Relay Instruction Manual Date Code 20060320
Table 8.4 Demand Meter Settings and Settings Range ........................................................................8.24
Table 9.1 Serial Port SET Commands....................................................................................................9.1
Table 9.2 SET Command Editing Keystrokes........................................................................................9.3
Table 9.3 Equations Associated With U.S. Curves ................................................................................9.5
Table 9.4 Equations Associated With I.E.C. Curves ..............................................................................9.5
Table 9.5 SEL-311C Models 0311C00x and 0311C01x Relay Word Bits ..........................................9.16
Table 9.6 Relay Word Bit Definitions for the SEL-311C.....................................................................9.17
Table 10.1 Pinout Functions for EIA-232 Serial Ports 2, 3, and F.........................................................10.2
Table 10.2 Terminal Functions for EIA-485 Serial Port 1 .....................................................................10.2
Table 10.3 Serial Communications Port Pin/Terminal Function Definitions.........................................10.4
Table 10.4 Serial Port Automatic Messages...........................................................................................10.9
Table 10.5 Serial Port Command Summary .........................................................................................10.12
Table 10.6 Event Types.........................................................................................................................10.19
Table 10.7 SHO Command Options.....................................................................................................10.25
Table 10.8 STA Command Row and Column Definitions ...................................................................10.30
Table 10.9 TAR Command Options .....................................................................................................10.32
Table 10.10 SEL-311C Relay Word and Its Correspondence to TAR Command..................................10.32
Table 10.11 SEL-311C Control Subcommands .....................................................................................10.37
Table 12.1 Event Types...........................................................................................................................12.5
Table 12.2 Example EVE Commands ....................................................................................................12.7
Table 12.3 Standard Event Report Current, Voltage, and Frequency Columns .....................................12.9
Table 12.4 Output, Input, Protection, and Control Element Event Report Columns ...........................12.10
Table 12.5 Communication Elements Event Report Columns .............................................................12.15
Table 12.6 Example SER Serial Port Commands and Results.............................................................12.29
Table 12.7 Explanation of Row Entries for Figure 12.6.......................................................................12.31
Table 13.1 Features Useful for Relay Testing ........................................................................................13.5
Table 13.2 Fault Locator Test Values ...................................................................................................13.13
Table 13.3 Output Contact and Target LED Results ............................................................................13.13
Table 13.4 Types of Overcurrent Elements ..........................................................................................13.21
Table 13.5 Test Quantities for Zone 2 Phase Distance Element...........................................................13.35
Table 13.6 Test Quantities for Zone 2 Ground Mho Distance Element ...............................................13.42
Table 13.7 Test Quantities for Zone 2 Ground Quadrilateral Distance Element: Reactive Reach.......13.47
Table 13.8 Test Quantities for Zone 2 Ground Quadrilateral Distance Element: Resistive Reach ......13.52
Table 13.9 Test Result Problems ..........................................................................................................13.56
Table 13.10 Relay Self Tests ..................................................................................................................13.58
Table 13.11 Troubleshooting Procedure.................................................................................................13.60
Table 14.1 SEL-311C Settings Calculated From SEL-221G Settings ...................................................14.4
Table 14.2 SEL-311C SELOGIC Equation Equivalent to Each SEL-221G Mask Logic Setting............14.6
Table 14.3 SELOGIC Equivalent to SEL-221G Relay Word Bits ...........................................................14.7
Table 14.4 Default SEL-221G Mask Logic Setting for MRC................................................................14.8
Table 14.5 SEL-311C Settings Calculated From SEL-221G-5 Settings..............................................14.12
Table 14.6 SEL-311C SELOGIC Control Equation Equivalent
to Each SEL-221G-5 Mask Logic Setting.........................................................................14.14
Table 14.7 SELOGIC Equivalent to SEL-221G-5 Relay Word Bits......................................................14.15
Table 14.8 Default SEL-221G-5 Mask Logic Setting for MRC...........................................................14.16
Table 14.9 SEL-311C Settings Calculated From SEL-221H Settings .................................................14.19
Table 14.10 SEL-311C SELOGIC Control Equation Equivalent
to Each SEL-221H Mask Logic Setting ............................................................................14.21
Table 14.11 SELOGIC Equivalent to SEL-221H Relay Word Bits .........................................................14.22
Table 14.12 Default SEL-221H Mask Logic Setting for MPT...............................................................14.23
Table 14.13 SEL-311C Settings Calculated From SEL-221F Settings..................................................14.26
Table 14.14 SEL-311C SELOGIC Control Equation Equivalent
to Each SEL-221F Mask Logic Setting.............................................................................14.28
Table 14.15 SELOGIC Equivalent to SEL-221F Relay Word Bits..........................................................14.29
Table 14.16 Default SEL-221F Mask Logic Setting for MRC...............................................................14.30
Table 14.17 SEL-221F Setting PSVC for Settings P, S, and E ..............................................................14.31
Table 14.18 SEL-311C Settings Calculated From SEL-221F-3 Settings...............................................14.33

xiiiList of Tables
Date Code 20060320 Instruction Manual SEL-311C Relay
Table 14.19 SEL-311C SELOGIC Control Equation Equivalent
to Each SEL-221F-3 Mask Logic Setting ......................................................................... 14.36
Table 14.20 SELOGIC Equivalent to SEL-221F-3 Relay Word Bits ...................................................... 14.36
Table 14.21 Default SEL-221F Mask Logic Setting for MRC .............................................................. 14.37
Table 14.22 SEL-221F-3 Setting PSVC for Settings S, P, and E........................................................... 14.38
Table 14.23 SEL-221F-3 Setting BFIN1 ............................................................................................... 14.38
Table 14.24 SEL-311C Settings Calculated From SEL-221C Settings ................................................. 14.40
Table 14.25 SEL-311C SELOGIC Control Equation Equivalent
to Each SEL-221C Mask Logic Setting............................................................................ 14.43
Table 14.26 SELOGIC Equivalent to SEL-221C Relay Word Bits ......................................................... 14.43
Table 14.27 Default SEL-221C Mask Logic Setting for MTU.............................................................. 14.44
Table 14.28 SEL-311C Settings Calculated From SEL-221-16 Settings .............................................. 14.48
Table 14.29 SEL-311C SELOGIC Control Equation Equivalent
to Each SEL-221-16 Mask Logic Setting ......................................................................... 14.50
Table 14.30 SELOGIC Equivalent to SEL-221-16 Relay Word Bits ...................................................... 14.51
Table 14.31 Default SEL-221-16 Mask Logic Setting for MRC ........................................................... 14.51
Table 14.32 SEL-311C Settings Calculated From SEL-2PG10 Settings............................................... 14.54
Table 14.33 SEL-311C SELOGIC Control Equation Equivalent
to Each SEL-2PG10 Mask Logic Setting ......................................................................... 14.56
Table 14.34 SELOGIC Equivalent to SEL-2PG10 Relay Word Bits....................................................... 14.56
Table 14.35 Default SEL-2PG10 Mask Logic Setting for MT .............................................................. 14.57
Table A.1 Firmware Revision History ................................................................................................... A.1
Table A.2 Settings Change History........................................................................................................ A.4
Table A.3 Instruction Manual Revision History .................................................................................... A.5
Table B.1 Troubleshooting New Firmware Upload..............................................................................B.13
Table D.1 Binary Message List.............................................................................................................. D.2
Table D.2 ASCII Configuration Message List....................................................................................... D.2
Table D.3 A5C0 Relay Definition Block ............................................................................................... D.3
Table D.4 A5C1 Fast Meter Configuration Block ................................................................................. D.3
Table D.5 A5D1 Fast Meter Data Block................................................................................................ D.5
Table D.6 A5C2/A5C3 Demand/Peak Demand Fast Meter Configuration Messages........................... D.5
Table D.7 A5D2/A5D3 Demand/Peak Demand Fast Meter Message ................................................... D.8
Table D.8 A5CE Fast Operate Configuration Block.............................................................................. D.9
Table D.9 A5E0 Fast Operate Remote Bit Control.............................................................................. D.10
Table D.10 A5E3 Fast Operate Breaker Control ................................................................................... D.11
Table D.11 A5CD Fast Operate Reset Definition Block ....................................................................... D.11
Table D.12 A5ED Fast Operate Reset Command.................................................................................. D.12
Table E.1 Compressed ASCII Commands .............................................................................................E.1
Table E.2 Mapping Bits to Labels ........................................................................................................E.10
Table G.1 SEL Fast Message Protocol Format ...................................................................................... G.5
Table G.2 Unsolicited Fast Message Enable Packet .............................................................................. G.6
Table G.3 Unsolicited Fast Message Disable Packet ............................................................................. G.6
Table G.4 Permissible Message Periods Requested by Enable Message .............................................. G.7
Table G.5 SEL-311C Global Settings for Synchrophasors.................................................................... G.8
Table G.6 SEL-311C Serial Port Settings for Synchrophasors.............................................................. G.8
Table G.7 Time Synchronization Relay Word Bits.............................................................................. G.11
Table G.8 SEL Fast Message Voltage and Current Selections Based on PHDATAV and PHDATAI.. G.14
Table H.1 SELOGIC Control Equation Operators (Listed in Processing Order) .................................... H.4
Table I.1 Data Needed to Configure a Port for DNP..............................................................................I.2
Table I.2 Data Access Methods..............................................................................................................I.5
Table I.3 SEL-311C DNP3 Device Profile.............................................................................................I.6
Table I.4 SEL-311C Relay DNP Object Table .......................................................................................I.7
Table I.5 SEL-311C-Wye DNP Data Map ...........................................................................................I.10
Table J.1 Error Types Reported by the Communications Report ...........................................................J.3
Table K.1 Message Format for Function Code 01 ................................................................................. K.4
Table K.2 Message Format for Function Code 02 ................................................................................. K.5
Table K.3 Message Format for Function Code 18 ................................................................................. K.5
Table K.4 Format of Message if SER Records Have Been Lost............................................................ K.6

xiv List of Tables
SEL-311C Relay Instruction Manual Date Code 20060320
Table K.5 Acknowledge Message ..........................................................................................................K.7
Table K.6 Response Codes.....................................................................................................................K.7
Table L.1 ACSELERATOR QuickSet System Requirements................................................................... L.2

Date Code 20060320 Instruction Manual SEL-311C Relay
List of Figures
Figure 1.1 SEL-311C Transmission Line Protection With Pilot Protection,
MIRRORED BITS®Communications, Reclosing, and Synchronism Check ........................ 1.3
Figure 1.2 SEL-311C Inputs, Outputs, and Communications Ports
(Models 0311C00x and 0311C01x) ................................................................................... 1.5
Figure 1.3 SEL-311C Extra I/O Board (Model 0311C01x) .................................................................... 1.7
Figure 1.4 SEL-311C Communications Connections Examples............................................................. 1.8
Figure 2.1 SEL-311C Dimensions and Panel-Mount Cutout .................................................................. 2.1
Figure 2.2 SEL-311C Front- and Rear-Panel Drawings—
Models 0311C00H2 (Rack) and 0311C0032 (Panel)......................................................... 2.2
Figure 2.3 SEL-311C Front- and Rear-Panel Drawings—
Models 0311C00V1 (Rack) and 0311C0041 (Panel)......................................................... 2.3
Figure 2.4 SEL-311C Front-Panel Drawings—Models 0311C01H2 (Rack) and 0311C0132 (Panel) ... 2.4
Figure 2.5 SEL-311C Front-Panel Drawings—Models 0311C01H1 (Rack) and 0311C0131 (Panel) ... 2.5
Figure 2.6 SEL-311C Front-Panel Drawings—Models 0311C01V1 and 0311C01V2........................... 2.6
Figure 2.7 SEL-311C Front-Panel Drawings—Models 0311C0141 and 0311C0142 ............................ 2.7
Figure 2.8 SEL-311C 3U Rear-Panel Terminal Block Drawings
(With and Without Additional I/O Board).......................................................................... 2.8
Figure 2.9 SEL-311C 3U Rear-Panel Terminal Block Drawing
(Fast Hybrid High-Current Interrupting Output Contacts)................................................. 2.9
Figure 2.10 SEL-311C 2U Rear-Panel Connectorized®Drawing........................................................... 2.10
Figure 2.11 SEL-311C 3U Rear-Panel Connectorized Drawings
(With and Without Additional I/O Board)........................................................................ 2.11
Figure 2.12 Possible Connections for Fast High-Current Interrupting Output Contacts
(Circuit Load Not Shown, Third Terminal Connection Is Optional)................................ 2.14
Figure 2.13 SEL-311C Provides Distance and Overcurrent Protection,
Reclosing, and Synchronism Check for a Transmission Line.......................................... 2.16
Figure 2.14 SEL-311C Provides Distance and Overcurrent Protection and Reclosing
for a Transmission Line (Current-Polarization Source Connected to Channel IP) .......... 2.17
Figure 2.15 SEL-311C Line Protection Through a Delta-Wye Transformer
Using Compensator Distance Elements ........................................................................... 2.18
Figure 2.16 Jumper, Connector, and Major Component Locations on the SEL-311C Main Board........ 2.20
Figure 2.17 Jumper, Connector, and Major Component Locations on the SEL-311C Extra I/O Board. 2.21
Figure 2.18 Interface Board 5 Component Layout.................................................................................. 2.22
Figure 3.1 Positive-Sequence Polarized Mho Element With Reach Equal to Line Impedance .............. 3.3
Figure 3.2 Compensator-Distance Phase-to-Phase Element Operation................................................... 3.4
Figure 3.3 Compensator-Distance Three-Phase Element Operation ....................................................... 3.5
Figure 3.4 Zone 1 AB Phase Distance Logic .......................................................................................... 3.7
Figure 3.5 Zone 2 AB Phase Distance Logic .......................................................................................... 3.8
Figure 3.6 Zones 3 and 4 AB Phase Distance Logic ............................................................................... 3.9
Figure 3.7 Zone 1 Mho Ground Distance Logic.................................................................................... 3.11
Figure 3.8 Zone 2 Mho Ground Distance Logic.................................................................................... 3.12
Figure 3.9 Zones 3 and 4 Mho Ground Distance Logic ........................................................................ 3.12
Figure 3.10 Zone 1 Quadrilateral Ground Distance Logic ...................................................................... 3.13
Figure 3.11 Zone 2 Quadrilateral Ground Distance Logic ...................................................................... 3.14
Figure 3.12 Zones 3 and 4 Quadrilateral Ground Distance Logic........................................................... 3.15
Figure 3.13 Ground and Phase Distance Speed Curves—Standard Output ............................................ 3.17
Figure 3.14 Ground and Phase Distance Speed Curves—Fast Hybrid Output ....................................... 3.18
Figure 3.15 Zone 1 Extension Logic ....................................................................................................... 3.19
Figure 3.16 Zone Timing Elements ......................................................................................................... 3.21
Figure 3.17 Out-of-Step Zone Detection Logic....................................................................................... 3.24
Figure 3.18 Out-of-Step Logic ................................................................................................................ 3.25
Figure 3.19 Levels 1 Through 3 Phase Instantaneous/Definite-Time Overcurrent Elements ................. 3.27
Figure 3.20 SEL-311C Nondirectional Instantaneous Overcurrent Element Pickup Time Curve.......... 3.28
Figure 3.21 SEL-311C Nondirectional Instantaneous Overcurrent Element Reset Time Curve ............ 3.28

xvi List of Figures
SEL-311C Relay Instruction Manual Date Code 20060320
Figure 3.22 Levels 1 Through 4 Residual Ground Instantaneous/
Definite-Time Overcurrent Elements With Directional and Torque Control....................3.29
Figure 3.23 Levels 1 Through 4 Negative-Sequence Instantaneous/
Definite-Time Overcurrent Elements With Directional and Torque Control....................3.32
Figure 3.24 Phase Time-Overcurrent Element 51PT ...............................................................................3.34
Figure 3.25 Residual Ground Time-Overcurrent Element 51GT ............................................................3.37
Figure 3.26 Negative-Sequence Time-Overcurrent Element 51QT.........................................................3.38
Figure 3.27 Single-Phase and Three-Phase Voltage Elements.................................................................3.41
Figure 3.28 Phase-to-Phase and Sequence Voltage Elements..................................................................3.42
Figure 3.29 Channel VSVoltage Elements ..............................................................................................3.42
Figure 3.30 Synchronism Check Voltage Window and Slip Frequency Elements ..................................3.46
Figure 3.31 Synchronism Check Elements ..............................................................................................3.47
Figure 3.32 Angle Difference Between VPand VSCompensated
by Breaker Close Time (fP< fSand VPShown as Reference in This Example) ..............3.51
Figure 3.33 Undervoltage Block for Frequency Elements.......................................................................3.55
Figure 3.34 Levels 1 Through 6 Frequency Elements .............................................................................3.56
Figure 4.1 Loss-of-Potential Logic ..........................................................................................................4.1
Figure 4.2 CCVT Transient Blocking Logic............................................................................................4.4
Figure 4.3 Load-Encroachment Logic With Example Settings ...............................................................4.5
Figure 4.4 Migration of Apparent Positive-Sequence Impedance for a Fault Condition.........................4.8
Figure 4.5 General Logic Flow of Directional Control
for Ground Distance and Residual Ground Overcurrent Elements.....................................4.9
Figure 4.6 Internal Enables (32QE and 32QGE) Logic
for Negative-Sequence Voltage-Polarized Directional Elements......................................4.11
Figure 4.7 Internal Enables (32VE and 32IE) Logic for Zero-Sequence
Voltage-Polarized and Channel IP Current-Polarized Directional Elements....................4.12
Figure 4.8 Best Choice Ground Directional Logic ................................................................................4.13
Figure 4.9 Negative-Sequence Voltage-Polarized Directional Element
for Ground Distance and Residual Ground Overcurrent Elements...................................4.14
Figure 4.10 Zero-Sequence Voltage-Polarized Directional Element
for Ground Distance and Residual Ground Overcurrent Elements...................................4.15
Figure 4.11 Channel IP Current-Polarized Directional Element
for Ground Distance and Residual Ground Overcurrent Elements...................................4.16
Figure 4.12 Ground Distance and Residual Ground Directional Logic...................................................4.16
Figure 4.13 General Logic Flow of Directional Control for
Negative-Sequence Phase Overcurrent and Phase Distance Elements .............................4.17
Figure 4.14 Negative-Sequence Voltage-Polarized
Directional Element for Phase Distance and Negative-Sequence Elements.....................4.19
Figure 4.15 Positive-Sequence Voltage Polarized Directional Element for Phase Distance Elements ...4.20
Figure 5.1 Trip Logic ...............................................................................................................................5.2
Figure 5.2 Minimum Trip Duration Timer Operation (See Bottom of Figure 5.1) .................................5.3
Figure 5.3 Three-Pole Open Logic (Top) and Switch-Onto-Fault Logic (Bottom).................................5.7
Figure 5.4 Communications-Assisted Tripping Scheme........................................................................5.10
Figure 5.5 Permissive Input Logic Routing to POTT Logic..................................................................5.14
Figure 5.6 POTT Logic ..........................................................................................................................5.16
Figure 5.7 Permissive Input Logic Routing to Trip Logic.....................................................................5.17
Figure 5.8 SEL-311C Connections to Communications Equipment
for a Two-Terminal Line POTT Scheme...........................................................................5.18
Figure 5.9 SEL-311C Connections to Communications Equipment
for a Three-Terminal Line POTT Scheme ........................................................................5.18
Figure 5.10 DCUB Logic.........................................................................................................................5.22
Figure 5.11 Unblocking Block Logic Routing to Trip Logic ..................................................................5.23
Figure 5.12 SEL-311C Connections to Communications Equipment
for a Two-Terminal Line DCUB Scheme (Setting ECOMM = DCUB1).........................5.23
Figure 5.13 SEL-311C Connections to Communications Equipment
for a Three-Terminal Line DCUB Scheme (Setting ECOMM = DCUB2).......................5.24
Figure 5.14 DCB Logic............................................................................................................................5.28

xviiList of Figures
Date Code 20060320 Instruction Manual SEL-311C Relay
Figure 5.15 SEL-311C Connections to Communications Equipment
for a Two-Terminal Line DCB Scheme............................................................................ 5.29
Figure 5.16 SEL-311C Connections to Communications Equipment
for a Three-Terminal Line DCB Scheme.......................................................................... 5.30
Figure 5.17 Seal-in of Breaker Failure Occurrence for Message Display............................................... 5.34
Figure 6.1 Close Logic ............................................................................................................................ 6.2
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-311C Relays 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.................................................................... 6.11
Figure 6.6 Reclosing Sequence From Reset to Lockout With Example Settings.................................. 6.15
Figure 6.7 Reclose Blocking for Islanded Generator ............................................................................ 6.23
Figure 7.1 Example Operation of Optoisolated Inputs
IN101 Through IN106 (Models 0311C00x and 0311C01x) .............................................. 7.3
Figure 7.2 Example Operation of Optoisolated Inputs
IN1201 Through IN208—Extra I/O Board (Model 0311C01x) ........................................ 7.4
Figure 7.3 Circuit Breaker Auxiliary Contact and
Reclose Enable Switch Connected to Optoisolated Inputs IN101 and IN102 ................... 7.5
Figure 7.4 Local Control Switches Drive Local Bits LB1 Through LB16.............................................. 7.7
Figure 7.5 Local Control Switch Configured as an ON/OFF Switch...................................................... 7.8
Figure 7.6 Local Control Switch Configured as an OFF/MOMENTARY Switch .................................. 7.8
Figure 7.7 Local Control Switch Configured as an ON/OFF/MOMENTARY Switch ........................... 7.8
Figure 7.8 Configured Manual Trip Switch Drives Local Bit LB3 ......................................................... 7.9
Figure 7.9 Configured Manual Close Switch Drives Local Bit LB4....................................................... 7.9
Figure 7.10 Remote Control Switches Drive Remote Bits RB1 Through RB16 .................................... 7.11
Figure 7.11 Traditional Latching Relay................................................................................................... 7.13
Figure 7.12 Latch Control Switches Drive Latch Bits LT1 Through LT16............................................. 7.13
Figure 7.13 SCADA Contact Pulses Input IN104 to Enable/Disable Reclosing Relay .......................... 7.14
Figure 7.14 Latch Control Switch Controlled by a Single Input to Enable/Disable Reclosing .............. 7.14
Figure 7.15 Latch Control Switch Operation Time Line......................................................................... 7.16
Figure 7.16 Time Line for Reset of Latch Bit LT2 After Active Setting Group Change ........................ 7.17
Figure 7.17 Latch Control Switch (With Time Delay Feedback)
Controlled by a Single Input to Enable/Disable Reclosing .............................................. 7.18
Figure 7.18 Latch Control Switch (With Time Delay Feedback) Operation Time Line ......................... 7.18
Figure 7.19 SCADA Contact Pulses Input IN105
to Switch Active Setting Group Between Setting Groups 1 and 4 ................................... 7.21
Figure 7.20 SELOGIC Control Equation Variable Timer SV8T Used in Setting Group Switching......... 7.21
Figure 7.21 Active Setting Group Switching (With Single Input) Time Line......................................... 7.23
Figure 7.22 Rotating Selector Switch Connected to Inputs IN101, IN102,
and IN103 for Active Setting Group Switching ............................................................... 7.24
Figure 7.23 Active Setting Group Switching (With Rotating Selector Switch) Time Line .................... 7.26
Figure 7.24 SELOGIC Control Equation Variables/Timers SV1/SV1T–SV6/SV6T................................ 7.28
Figure 7.25 SELOGIC Control Equation Variables/Timers SV7/SV7T–SV16/SV16T............................ 7.29
Figure 7.26 Dedicated Breaker Failure Scheme Created
With SELOGIC Control Equation Variables/Timers.......................................................... 7.30
Figure 7.27 Logic Flow for Example Output Contact Operation (Models 0311C00x and 0311C01x) .. 7.34
Figure 7.28 Logic Flow for Example Output Contact Operation—
Extra I/O Board (Model 0311C01x)................................................................................. 7.35
Figure 7.29 Traditional Panel Light Installations .................................................................................... 7.36
Figure 7.30 Rotating Default Display Replaces Traditional Panel Light Installations............................ 7.37
Figure 8.1 Plotted Breaker Maintenance Points for an Example Circuit Breaker................................... 8.3
Figure 8.2 SEL-311C Breaker Maintenance Curve for an Example Circuit Breaker ............................. 8.5
Figure 8.3 Operation of SELOGIC Control Equation Breaker Monitor Initiation Setting ....................... 8.6
Figure 8.4 Breaker Monitor Accumulates 10 Percent Wear.................................................................... 8.8
Figure 8.5 Breaker Monitor Accumulates 25 Percent Wear.................................................................... 8.9
Figure 8.6 Breaker Monitor Accumulates 50 Percent Wear.................................................................. 8.10
Figure 8.7 Breaker Monitor Accumulates 100 Percent Wear ................................................................ 8.11

xviii List of Figures
SEL-311C Relay Instruction Manual Date Code 20060320
Figure 8.8 Input IN106 Connected to Trip Bus for Breaker Monitor Initiation ....................................8.13
Figure 8.9 DC Under- and Overvoltage Elements .................................................................................8.15
Figure 8.10 Create DC Voltage Elements With SELOGIC Control Equations .........................................8.16
Figure 8.11 Response of Thermal and Rolling Demand Meters to a Step Input
(Setting DMTC = 15 Minutes)..........................................................................................8.21
Figure 8.12 Current ISApplied to Parallel RC Circuit ............................................................................8.22
Figure 8.13 Demand Current Logic Outputs ...........................................................................................8.24
Figure 8.14 Raise Pickup of Residual Ground Time-Overcurrent Element for Unbalance Current .......8.25
Figure 9.1 U. S. Moderately Inverse Curve: U1 ......................................................................................9.6
Figure 9.2 U. S. Inverse Curve: U2 ..........................................................................................................9.7
Figure 9.3 U. S. Very Inverse Curve: U3 .................................................................................................9.8
Figure 9.4 U. S. Extremely Inverse Curve: U4 ........................................................................................9.9
Figure 9.5 U. S. Short-Time Inverse Curve: U5.....................................................................................9.10
Figure 9.6 I. E. C. Class A Curve (Standard Inverse): C1 .....................................................................9.11
Figure 9.7 I. E. C. Class B Curve (Very Inverse): C2 ............................................................................9.12
Figure 9.8 I. E. C. Class C Curve (Extremely Inverse): C3 ...................................................................9.13
Figure 9.9 I. E. C. Long-Time Inverse Curve: C4..................................................................................9.14
Figure 9.10 I. E. C. Short-Time Inverse Curve: C5 .................................................................................9.15
Figure 10.1 DB-9 Connector Pinout for EIA-232 Serial Ports ................................................................10.2
Figure 11.1 SEL-311C Front-Panel Pushbuttons—Overview .................................................................11.2
Figure 11.2 SEL-311C Front-Panel Pushbuttons—Primary Functions ...................................................11.3
Figure 11.3 SEL-311C Front-Panel Pushbuttons—Primary Functions (Continued)...............................11.4
Figure 11.4 SEL-311C Front-Panel Pushbuttons—Secondary Functions ...............................................11.5
Figure 11.5 Local Control Switch Configured as an ON/OFF Switch ....................................................11.8
Figure 11.6 Local Control Switch Configured as an OFF/MOMENTARY Switch ................................11.8
Figure 11.7 Local Control Switch Configured as an ON/OFF/MOMENTARY Switch..........................11.9
Figure 11.8 Correspondence Between Changing Display Point States
and Enabled Display Point Labels ..................................................................................11.14
Figure 12.1 Example Event Summary .....................................................................................................12.4
Figure 12.2 Example Synchrophasor-Level Precise Event Report 1/16-Cycle Resolution .....................12.8
Figure 12.3 Example Standard 15-Cycle Event Report 1/4-Cycle Resolution......................................12.24
Figure 12.4 Derivation of Event Report Current Values
and RMS Current Values From Sampled Current Waveform .........................................12.25
Figure 12.5 Derivation of Phasor RMS Current Values From Event Report Current Values ................12.26
Figure 12.6 Example Sequential Events Recorder (SER) Event Report................................................12.31
Figure 13.1 Low-Level Test Interface ......................................................................................................13.6
Figure 13.2 Three Voltage Source and Three Current Source Test Connections...................................13.15
Figure 13.3 Phase-to-Phase, Phase-to-Ground, and
Two-Phase-to-Ground Fault Test Connections Using Two Current Sources..................13.16
Figure 13.4 Three-Phase Fault and METER Test Connections Using Two Current Sources................13.17
Figure 13.5 Phase-to-Ground Fault Test Connections Using a Single Current Source .........................13.18
Figure 13.6 Phase-to-Phase Fault Test Connections Using a Single Current Source ............................13.19
Figure 13.7 Communications Connections Between the SEL-311C and a Terminal ............................13.19
Figure 13.8 Phase Distance Element Test Voltage Signals ....................................................................13.37
Figure 14.1 SEL-221G and SEL-311C Out-of-Step Characteristics .......................................................14.3
Figure 14.2 SEL-221G-5 and SEL-311C Out-of-Step Characteristics..................................................14.11
Figure 14.3 Voltage Supervised Reclosing Logic..................................................................................14.46
Figure B.1 Establishing a Connection ..................................................................................................... B.3
Figure B.2 Determining the Computer Serial Port .................................................................................. B.3
Figure B.3 Determining Communications Parameters for the Computer ............................................... B.4
Figure B.4 Setting Terminal Emulation................................................................................................... B.4
Figure B.5 Terminal Emulation Startup Prompt......................................................................................B.5
Figure B.6 Correcting the Port Setting .................................................................................................... B.5
Figure B.7 Correcting the Communications Parameters ......................................................................... B.6
Figure B.8 Preparing HyperTerminal for ID Command Display ............................................................ B.7
Figure B.9 List of Commands Available in SELBOOT ............................................................................ B.8
Figure B.10 Matching Computer to Relay Parameters.............................................................................. B.9
Figure B.11 Example Receive File Dialog Box.......................................................................................B.10