Schweitzer Engineering Laboratories SEL-311L User manual

SEL-311L
LINE CURRENT DIFFERENTIAL
PROTECTION AND AUTOMATION SYSTEM
INSTRUCTION MANUAL
SCHWEITZER ENGINEERING LABORATORIES
2350 NE HOPKINS COURT
PULLMAN, WA USA 99163-5603
TEL: [phone] FAX: [phone]

!
CAUTION: The relay contains devices sensitive to
electrostatic discharge (ESD). When working on
the relay with front or top cover removed, work
surfaces and personnel must be properly grounded
or equipment damage may result.
!
ATTENTION: Le relais contient des pièces
sensibles aux décharges électrostatiques (DES).
Quand on travaille sur le relais avec le panneau
avant ou du dessus enlevé, les surfaces de travail et
le personnel doivent être mis à la terre
convenablement pour éviter les dommages à
l'équipement.
!
CAUTION: There is danger of explosion if the
battery is incorrectly replaced. Replace only with
Ray-O-Vac®no. BR2335 or equivalent
recommended by manufacturer. Dispose of used
batteries according to the manufacturer’s
instructions.
!
ATTENTION: Il y a un danger d’explosion si la
pile électrique n’est pas correctement remplacée.
Utiliser exclusivement Ray-O-Vac®No. BR2335 ou
un équivalent recommandé par le fabricant. Se
débarrasser des piles usagées suivant les
instructions du fabricant.
!
WARNING: This device is shipped with default
passwords. Default passwords should be changed
to private passwords at installation. Failure to
change each default password to a private password
may allow unauthorized access. SEL shall not be
responsible for any damage resulting from
unauthorized access.
!
AVERTISSEMENT: Cet équipement est expédié
avec des mots de passe par défaut. A l'installation,
les mots de passe par défaut devront être changés
pour des mots de passe confidentiels. Dans le cas
contraire, un accès non-autorisé à l'équipement
pourrait être possible. SEL décline toute
responsabilité pour tout dommage résultant de cet
accès non-autorisé.
!
DANGER: Removal of this front panel exposes
circuitry which may cause electrical shock that can
result in injury or death.
!
DANGER:Le retrait du panneau avant expose à la
circuiterie qui pourrait être la source de chocs
électriques pouvant entraîner des blessures ou la
mort.
The software (firmware), schematic drawings, relay commands, and relay messages are copyright protected by the United States Copyright Law and International Treaty
provisions. ll rights are reserved.
You may not copy, alter, disassemble, or reverse-engineer the software. You may not provide the software to any third party.
ll brand or product names appearing in this document are the trademark or registered trademark of their respective holders.
Schweitzer Engineering Laboratories, SELOGIC, Connectorized, Job Done, SEL-PROFILE, and are registered trademarks of Schweitzer Engineering Laboratories.
The English language manual is the only approved SEL manual.
Copyright © SEL 2001 ( ll rights reserved) Printed in US .
This product is covered by U.S. Patent Numbers: 5,041,737; 5,208,545; 5,317,472; 5,325,061; 5,349,490; 5,365,396; 5,367,426; 5,479,315; 5,515,227; 5,652,688;
5,694,281; 5,703,745; 5,731,943; 5,790,418; 5,793,750; 5,883,578; 6,028,754: U.S. Patent(s) Pending, and Foreign Patent(s) Granted and Pending.
This product is covered by the standard SEL 10-year warranty. For warranty details, visit www.selinc.com or contact your customer service representative.

Date Code 20011112 Manual Change Information i
SEL-311L Instruction Manual
MANUAL CHANGE INFORMATION
The date code at the bottom of each page of this manual reflects the creation or revision date.
Date codes are changed only on pages that have been revised and any following pages affected
by the revisions (i.e., pagination). If significant revisions are made to a section, the date code on
all pages of the section will be changed to reflect the revision date.
Each time revisions are made, both the main table of contents and the affected individual section
table of contents are regenerated and the date code is changed to reflect the revision date.
Changes in this manual to date are summarized below (most recent revisions listed at top).
Revision
Date Summary of Revisions
The Manual Change Information section has been created to begin a record of revisions to
this manual. All changes will be recorded in this Summary of Revisions table.
20011112 Section 1:
− Updated Optoisolated Input Ratings information in Relay Specifications.
− Corrected references to figures in Section 3 in Relay Element Settings
Ranges and Accuracies.
Section 2:
− Updated table SEL-311L Relay Line Current Differential Electrical
Interface Cable Application.
Section 3:
− Added OPO Open Pole Option (52,27).
− Corrected ETAP setting indicated in Differential Element Settings and
Specifications.
− Updated the following figures: Phase Differential Element 87LA Processing
for Channel X. B and C Phases and Channel Y Are Similarly Processed;
Negative-Sequence Differential Element 87L2 Processing for Channel X.
Channel Y Processing Similar; and Ground Differential Element 87L2
Processing for Channel X. Channel Y Processing Similar.
Section 6:
− Corrected the ETAP setting indicated in Reclosing Relay Shot Counter.
Section 9:
− Updated ORDER default setting text in the Settings Sheets.
Section 10:
− Corrected names of the transmit bits in Front-Panel LED 87LCH FAIL.
− Updated table EIA- 422 Clock Polarity Settings for Popular
Communications Equipment.

ii Manual Change Information Date Code 20011112
SEL-311L Instruction Manual
Revision
Date Summary of Revisions
Section 14:
− Removed SELOGIC®Control Equations Variable Timers section in the APP
= 87L Settings Sheets.
Appendix A:
− Internal changes to correct local control bits operation.
− Internal changes to correct SELOGIC TR setting for 87L21 application.
− Internal changes to correct counter overflow in INT87 board.
Appendix B:
Added note about the self-extracting Zip file to step 7.
20011017 Added new Appendix K: SEL-5030 ACSELERATOR™.
20010820 Appendix A:
− Internal changes to improve EIA-422 clock detection.
20010717 Appendix A:
− Internal changes to correct unused CT scaling issue.
20010625 New Manual Release.

Date Code 20011112 Table of Contents i
SEL-311L Instruction Manual
SEL-311L INSTRUCTION MANUAL
TABLE OF CONTENTS
SECTION 1: INTRODUCTION AND SPECIFICATIONS
SECTION 2: INSTALLATION
SECTION 3: LINE CURRENT DIFFERENTIAL, DISTANCE, OUT-OF-STEP,
OVERCURRENT, VOLTAGE, AND SYNCHRONISM CHECK
ELEMENTS
SECTION 4: LOSS-OF-POTENTIAL, CCVT TRANSIENT DETECTION,
LOAD-ENCROACHMENT, AND DIRECTIONAL ELEMENT
LOGIC
SECTION 5: TRIP AND TARGET LOGIC
SECTION 6: CLOSE AND RECLOSE LOGIC
SECTION : INPUTS, OUTPUTS, TIMERS, AND OTHER CONTROL LOGIC
SECTION 8: BREAKER MONITOR AND METERING FUNCTIONS
SECTION 9: SETTING THE RELAY
SECTION 10: CURRENT DIFFERENTIAL COMMUNICATIONS AND SERIAL
PORT COMMUNICATIONS AND COMMANDS
SECTION 11: FRONT-PANEL INTERFACE
SECTION 12: STANDARD EVENT REPORTS AND SER
SECTION 13: TESTING, TROUBLESHOOTING, AND COMMISSIONING
SECTION 14: APPLICATION SETTINGS FOR SEL-311L RELAYS
SECTION 15: APPENDICES
Appendix A: Firmware Versions
Appendix B: Firmware Upgrade Instructions
Appendix C: SEL Distributed Port Switch Protocol
Appendix D: Configuration, Fast Meter, and Fast Operate Commands
Appendix E: Compressed ASCII Commands
Appendix F: Setting Negative-Sequence Overcurrent Elements
Appendix G: Setting SELOGIC® Control Equations
Appendix H: Distributed Network Protocol (DNP) 3.00 Level 2
Appendix I: MIRRORED BITS™ Communications
Appendix J: Example Calculations for 8 L Settings
Appendix K: SEL-5030 ACSELERATOR™
SEL-311L RELAY COMMAND SUMMARY

Date Code 20011112 Introduction and Specifications i
SEL-311L Instruction Manual
TABLE OF CONTENTS
SECTION 1: INTRODUCTION AND SPECIFICATIONS......................1-1
SEL-311L Relay Models ..............................................................................................................1-1
Instruction Manual Sections Overview ........................................................................................1-2
Applications..................................................................................................................................1-5
AC/DC Connections .....................................................................................................................1-7
Communications Connections for Control, Configuration, and Interrogation.............................1-9
Relay Specifications ...................................................................................................................1-10
General Specifications ........................................................................................................1-10
Processing Specifications ...................................................................................................1-13
Relay Element Settings Ranges and Accuracies ................................................................1-14
FIGURES
Figure 1.1: Typical Two-Terminal Application With Hot Standby Channel and Tapped Load ............1-5
Figure 1.2: Typical Two-Terminal Application With Voltage Inputs....................................................1-6
Figure 1.3: Typical Three-Terminal Application With Optional Third Communications
Channel ..........................................................................................................................1-6
Figure 1.4: SEL-311L Relay Inputs and Outputs ...................................................................................1-7
Figure 1.5: SEL-311L Relay Communications Interfaces......................................................................1-8
Figure 1.6: SEL-311L Relay Communications Connections Examples.................................................1-9

Date Code 20011112 Introduction and Specifications 1-1
SEL-311L Instruction Manual
SECTION 1: INTRODUCTION AND SPECIFICATIONS
This instruction manual covers the SEL-311L, a digital line current differential relay with
integrated communications interfaces. In addition to line current differential protection, the
SEL-311L Relay contains all the protection, control, and communication features available in the
SEL-311C Relay including distance, directional, and nondirectional overcurrent protection;
under- and overvoltage and frequency protection; and multishot reclosing.
The SEL-311L Relay implements line current differential protection using communications
interfaces, a processor, and contact outputs separate from those used for backup protection and
control. A failure in the line current differential hardware does not impact backup protection.
This section includes the following overviews of the SEL-311L Relay:
SEL-311L Relay Models
Instruction Manual Sections
Applications
AC/DC Connections
Communications Ports
Communications Connections
Relay Specifications
SEL-311L RELAY MODELS
The SEL-311L Relay has the following standard features:
• Screw-terminal blocks
• Wye-connected voltage inputs
• 8 standard output contacts and 6 fast, high-current interrupting output contacts
• 6 optoisolated contact inputs
• 1 EIA-485 port
• 3 EIA-232 ports
• IRIG-B time synchronization
Select between the following ordering options:
• Horizontal rack mount, or horizontal or vertical panel mount
• 1 A or 5 A current transformers
• 125/250 V or 24/48 V power supply
• Five control input voltage selections
In addition, DNP 3.00 Level 2 Slave is available.

1-2 Introduction and Specifications Date Code 20011112
SEL-311L Instruction Manual
Purchase the SEL-311L Relay with one or a combination of two of the following line current
differential channel interfaces:
• Isolated EIA-422
• Isolated G.703 codirectional
• 850 nm Multimode Fiber (IEEE Propose Standard PC37.94)
• 1300 nm Direct Fiber
See the SEL-311L Relay Model Option table (MOT) for available combinations.
When the relay is purchased with two channel interfaces, the second channel can be used as a hot
standby channel or to protect a three-terminal line.
INSTRUCTION MANUAL SECTIONS OVERVIEW
The following is an overview of the other sections in this instruction manual:
Section 2: Installation describes mounting and wiring the SEL-311L Relay, application and
communications connections, and the operation of circuit board jumpers. Figure 2.2 through
Figure 2.5 show the SEL-311L Relay front and rear panels.
Section 3: Line Current Differential, Distance, Out-of-Step, Overcurrent, Voltage,
Synchronism Check, and Frequency Elements describes the operation of:
• Line current differential elements (phase, negative-sequence, and zero-sequence)
• Phase and ground distance elements (phase mho, compensator distance, ground
mho, quadrilateral ground, and Zone 1 extension)
• Out-of-step elements
• Instantaneous/definite-time overcurrent elements (phase, residual ground, and
negative-sequence)
• Time-overcurrent elements (phase, residual ground, and negative-sequence)
• Voltage elements (single-phase, phase-to-phase, etc.)
• Synchronism check elements
• Frequency elements
Section 4: Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and
Directional Element Logic describes the operation of:
• Loss-of-potential logic and its effect on distance and directional elements
• CCVT transient detection logic and its effect on Zone 1 distance elements
• Load-encroachment logic and its application to phase distance and overcurrent
elements
• Voltage-polarized and current-polarized directional elements
• Best Choice Ground Directional™ logic and automatic settings

Date Code 20011112 Introduction and Specifications 1-3
SEL-311L Instruction Manual
Section 5: Trip and Target Logic describes the operation of:
• Line current differential high-speed trip logic
• Backup protection trip logic
• Switch-Onto-Fault trip logic
• Communications-assisted trip logic
• Front-panel target LEDs
Section 6: Close and Reclose Logic describes the close logic operation for:
• Automatic reclosing
• Other close conditions (e.g., manual close initiation via serial port or optoisolated
inputs)
Section 7: Inputs, Outputs, Timers, and Other Control Logic describes the operation of:
• Optoisolated inputs IN101 through IN106
• Output contacts OUT101 through OUT107, ALARM, and OUT201 through
OUT206
• Local control switches (local bit outputs LB1 through LB16)
• Remote control switches (remote bit outputs RB1 through RB16)
• Latch control switches (latch bit outputs LT1 through LT16)
• Multiple setting groups (six available)
• Programmable timers (timer outputs SV1T through SV16T)
• Rotating default displays and display points
Section 8: Breaker Monitor and Metering Functions describes the operation of:
• Breaker monitor
• Station dc monitor
• Line current differential and local (backup) metering
• Demand and maximum/minimum metering
• Energy metering
Section 9: Setting the Relay explains how to enter settings and also contains the following
setting reference information:
• Time-overcurrent curves (5 US and 5 IEC curves)
• Relay Word bit table and definitions (Relay Word bits are used in SELOGIC control
equation settings)
• Settings Sheets for general relay, SELOGIC control equation, global, SER, text
label, and serial port settings

1-4 Introduction and Specifications Date Code 20011112
SEL-311L Instruction Manual
The Settings Sheets can be photocopied and filled out to set the SEL-311L Relay.
Note that these sheets correspond to the serial port SET commands listed in
Table 9.1.
See Section 14 for a description of Application Settings APP = 87L, 87L21, and
87L21P.
• Two terminal with tapped load settings example
Section 10: Line Current Differential Communications and Serial Port Communications and
Commands describes:
• 87L communications interfaces, channel monitors, and associated settings
• Serial port connector pinout/terminal functions
• Communications cables
• Communications protocol
• Serial port commands
See SHO Command (Show/View Settings) in Section 10 for a list of the
SEL-311L Relay factory default relay settings.
Section 11: Front-Panel Interface describes the operation of:
• Pushbuttons and correspondence to serial port commands
• Local control switches (local bit outputs LB1 through LB16)
• Rotating default displays and display points
Section 12: Standard Event Reports and SER describes:
• Standard 15-, 30-, and 60-cycle event reports for line current differential and
backup protection
• Event summaries
• Sequential events recorder (SER) report
Section 13: Testing, Troubleshooting, and Commissioning describes:
• General testing philosophy, methods, and tools
• Alpha plane 87L element test procedures
• Relay self-tests and troubleshooting
• 87L channel troubleshooting
• Commissioning
Section 14: Applications Settings for SEL-311L Relays
• Settings Sheets for the 87L, 87L21, and 87L21P applications

Date Code 20011112 Introduction and Specifications 1-5
SEL-311L Instruction Manual
Section 15: Appendices contains the following appendices:
• Appendix A: Firmware Versions
• Appendix B: Firmware Upgrade Instructions
• Appendix C: SEL Distributed Port Switch Protocol
• Appendix D: Configuration, Fast Meter, and Fast Operate Commands
• Appendix E: Compressed ASCII Commands
• Appendix F: Setting Negative-Sequence Overcurrent Elements
• Appendix G: Setting SELOGIC®Control Equations
• Appendix H: Distributed Network Protocol (DNP) 3.00 Level 2
• Appendix I: MIRRORED BITS™ Communications
• Appendix J: Example Calculations for 87L Settings
The SEL-311L Relay Command Summary briefly describes the serial port commands that are
described in detail in Section 10: Current Differential Communications and Serial Port
Communications and Commands.
APPLICATIONS
DWG: M311L003a
Dedicated Fiber
850 nm multimode (C37.9 ) or
1300 nm
Hot Standby Channel
87L87L
Digital
Multiplexer
SEL-311L CH X
CH Y SEL-311L
CH X
CH Y
Digital
Multiplexer
EIA- 22, G.703,
or C37.9 Fiber
EIA- 22, G.703,
or C37.9 Fiber
Figure 1.1: Typical Two-Terminal Application With Hot Standby Channel and Tapped
Load

1-6 Introduction and Specifications Date Code 20011112
SEL-311L Instruction Manual
DWG: M311L005a
Teleprotection
Equipment
Backup Teleprotection Channel
87L
SEL-311L CH X
87L
SEL-311L
CH X
Teleprotection
Equipment
Dedicated Fiber
850 nm multimode (PC37.9 ) or
1300 nm
Figure 1.2: Typical Two-Terminal Application With Voltage Inputs
DWG: M311L006a
87L87L
87L
(Optional)
SEL-311L
CH X
CH Y
SEL-311L CH X
CH Y
SEL-311L
CH X
CH Y
Figure 1.3: Typical Three-Terminal Application With Optional Third Communications
Channel

Date Code 20011112 Introduction and Specifications 1-7
SEL-311L Instruction Manual
AC/DC CONNECTIONS
Figure 1.4 and Figure 1.5 show general connection points. See General Specifications later in
this section and Section 2: Installation for more information on hardware and connections.
Figure 1.4: SEL-311L Relay Inputs and Outputs

1- Introduction and Specifications Date Code 20011112
SEL-311L Instruction Manual
Figure 1.5: SEL-311L Relay Communications Interfaces

Date Code 20011112 Introduction and Specifications 1-9
SEL-311L Instruction Manual
COMMUNICATIONS CONNECTIONS FOR CONTROL, CONFIGURATION, AND
INTERROGATION
See Port Connector and Communications Cables in Section 10: Current Differential
Communications and Serial Port Communications and Commands for more communications
connection information.
Figure 1.6: SEL-311L Relay Communications Connections Examples

1-10 Introduction and Specifications Date Code 20011112
SEL-311L Instruction Manual
RELAY SPECIFICATIONS
Important: Do not use the following specification information to order an SEL-311L Relay.
Refer to the actual ordering information sheets.
Gener l Specific tions
Terminal Connections: Rear Screw-Terminal Tightening Torque:
Minimum: 8-in-lb (0.8 Nm)
Maximum: 12-in-lb (1.4 Nm)
Terminals or stranded copper wire. Ring terminals are recommended.
Minimum temperature rating of 105°C.
AC Current Inputs: 5 A nominal
15 A continuous, linear to 100 A symmetrical.
500 A for 1 second.
1250 A for 1 cycle.
Burden: 0.27 VA @ 5 A
2.51 VA @ 15 A
1 A nominal
3 A continuous, linear to 20 A symmetrical.
100 A for 1 second.
250 A for 1 cycle.
Burden: 0.13 VA @ 1 A
1.31 VA @ 3 A
AC Voltage Inputs: 67 VL-N three-phase four-wire connection.
150 VL-N continuous (connect any voltage up to 150 Vac).
365 Vac for 10 seconds.
Burden: 0.13 VA @ 67 V
0.45 VA @ 120 V
Power Supply: 125/250 Vdc or Vac
Range: 85–350 Vdc or 85–264 Vac
Burden: < 15 W
24/48 Vdc
Range: 20–60 Vdc
Burden: < 15 W
Output Contacts:
(OUT101-107, ALARM)
Standard
30 A make
6 A continuous carry at 70°C; 4 A continuous carry at 85°C
50 A for one second
MOV protected: 270 Vac, 360 Vdc, 40 J;
Pickup time: < 5 ms.
Breaking Capacity (10,000 operations):
48 V 0.5 A L/R = 40 ms
125 V 0.3 A L/R = 40 ms
250 V 0.2 A L/R = 40 ms
Cyclic Capacity (2.5 cycles/second):
48 V 0.5 A L/R = 40 ms
125 V 0.3 A L/R = 40 ms
250 V 0.2 A L/R = 40 ms

Date Code 20011112 Introduction and Specifications 1-11
SEL-311L Instruction Manual
(OUT 201-206) High-current interrupting
30 A make
6 A continuous carry at 70°C; 4 A continuous carry at 85°C
50 A for one second
MOV protected: 330 Vdc, 40 J;
Pickup time: < 10 µs;
Dropout time: < 8 ms, typical
Breaking Capacity (10,000 operations):
48 V 10 A L/R = 40 ms
125 V 10 A L/R = 40 ms
250 V 10 A L/R = 20 ms
Cyclic Capacity (4 interruptions/second, followed by 2 minutes idle
for thermal dissipation):
48 V 10 A L/R = 40 ms
125 V 10 A L/R = 40 ms
250 V 10 A L/R = 20 ms
Note: Make per IEEE C37.90–1989; Breaking and Cyclic Capacity
per IEC 60255-23–1994.
Optoisolated Input Ratings: 250 Vdc: Pickup 200–300 Vdc; dropout 150 Vdc
220 Vdc: Pickup 176–264 Vdc; dropout 132 Vdc
125 Vdc: Pickup 105–150 Vdc; dropout 75 Vdc
110 Vdc: Pickup 88–132 Vdc; dropout 66 Vdc
48 Vdc: Pickup 38.4–60 Vdc; dropout 28.8 Vdc
24 Vdc: Pickup 15–30 Vdc
Note: 24, 48, 125, 220, and 250 Vdc optoisolated inputs draw
approximately 5 mA of current; 110 Vdc inputs draw
approximately 8 mA of current. All current ratings are at
nominal input voltages.
Frequency and Rotation: System Frequency: 50 or 60 Hz
Phase Rotation: ABC or ACB (settable)
Frequency
Tracking Range: 40.1–65 Hz
Serial Communications Ports: EIA-232: 1 Front and 2 Rear
EIA-485: 1 Rear, 2100 Vdc isolation
Baud Rate: 300–38400

1-12 Introduction and Specifications Date Code 20011112
SEL-311L Instruction Manual
Differential
Communications Ports: Fiber Optics—ST connector
1300 nm multimode or single mode:
Tx Power: -18 dBm
Rx Min. Sensitivity: -58 dBm
Rx Max. Sensitivity: 0 dBm
System Gain: 40 dB
850 nm multimode, PC37.94
50 µm 62.5 µm
Tx Power: -23 dBm -19 dBm
Rx Min. Sensitivity: -32 dBm -32 dBm
Rx Max. Sensitivity: -11 dBm -11 dBm
System Gain: 9 dB 13 dB
Electrical
EIA-422: 56 or 64 Kbps synchronous;
Isolated to 1500 Vac
CCITT G.703: 64 Kbps synchronous, codirectional
Time-Code Input: Relay accepts demodulated IRIG-B time-code input at Port 1 or 2.
Relay time is synchronized to within ±5 ms of time-source input.
Current differential protection does not require external time source.
Operating Temperature Range: -40°to +85°C (-40°to +185°F)
Note: LCD contrast impaired for temperatures below -20°C.
Relay Weight: 3U Rack unit: 16 lbs (7.24 kg)
Type Tests:
Electromagnetic Compatibility Immunity
Electrostatic Discharge: IEC 60255-22-2–1996, Severity Level 4
(8000 V contact, 15,000 V air)
Fast Transient
Disturbance: IEC 60255-22-4–1992;
IEC 61000-4-4–1995,
4 kV @ 2.5 kHz
(4000 V on power supply,
2000 V on inputs and outputs)
Radiated Radio
Frequency: IEC 60255-22-3–1989, 10 V/m;
IEEE C37.90.2–1995, 35 V/m
Surge Withstand: IEEE C37.90.1–1989, 3000 V oscillatory,
5000 V transient
1 MHz Burst
Disturbance: IEC 60255-22-1–1988, Severity Level 3
(2500 V common and 1000 V differential
mode)