Sel SEL-421-4 User manual

20150504
SEL-421-4, -5 Relay
Protection and
Automation System
Instruction Manual
User’s Guide
*PM421-04-NB*

SEL-421-4, -5 Relay User’s Guide Date Code 20150504
© 2010–2015 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 U.S. 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 document is provided for informational use only and is subject to change without notice. Schweitzer Engineering
Laboratories, Inc. has approved only the English language document.
This product is covered by the standard SEL 10-year warranty. For warranty details, visit www.selinc.com or contact your customer service
representative. PM421-04

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Date Code 20150504 SEL-421-4, -5 Relay
Table of Contents
Table of Contents
List of Tables ......................................................................................................................................................vii
List of Figures...................................................................................................................................................xxi
Preface.............................................................................................................................................................xxxiii
User’s Guide
Section 1: Introduction and Specifications
Features........................................................................................................................................................U.1.2
Models and Options.....................................................................................................................................U.1.5
SEL-421 Versions and Supported Features.................................................................................................U.1.7
Applications.................................................................................................................................................U.1.8
Specifications ............................................................................................................................................ U.1.13
Section 2: Installation
Shared Configuration Attributes.................................................................................................................. U.2.1
Plug-In Boards...........................................................................................................................................U.2.11
Jumpers......................................................................................................................................................U.2.17
Relay Placement........................................................................................................................................U.2.26
Connection.................................................................................................................................................U.2.27
AC/DC Connection Diagrams................................................................................................................... U.2.45
Section 3: PC Software
Overview .....................................................................................................................................................U.3.1
ACSELERATOR QuickSet Setup................................................................................................................... U.3.3
ACSELERATOR QuickSet Terminal .............................................................................................................U.3.5
ACSELERATOR QuickSet HMI....................................................................................................................U.3.6
ACSELERATOR QuickSet Settings...............................................................................................................U.3.8
ACSELERATOR QuickSet Event Analysis..................................................................................................U.3.16
ACSELERATOR QuickSet Settings Database Management .......................................................................U.3.20
ACSELERATOR QuickSet Help.................................................................................................................. U.3.22
Section 4: Basic Relay Operations
Inspecting a New Relay...............................................................................................................................U.4.1
Connecting and Applying Power.................................................................................................................U.4.3
Establishing Communication....................................................................................................................... U.4.4
Changing the Default Passwords.................................................................................................................U.4.6
Checking Relay Status...............................................................................................................................U.4.10
Making Simple Settings Changes..............................................................................................................U.4.14
Examining Metering Quantities ................................................................................................................U.4.35
Reading Oscillograms, Event Reports, and SER.......................................................................................U.4.44
Operating the Relay Inputs and Outputs ...................................................................................................U.4.58
Configuring High-Accuracy Timekeeping................................................................................................ U.4.73
Readying the Relay for Field Application.................................................................................................U.4.80
Section 5: Front-Panel Operations
Front-Panel Layout......................................................................................................................................U.5.1
Front-Panel Menus and Screens................................................................................................................ U.5.13
Front-Panel Automatic Messages..............................................................................................................U.5.34
Operation and Target LEDs.......................................................................................................................U.5.35
Front-Panel Operator Control Pushbuttons ...............................................................................................U.5.40

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Table of Contents
Section 6: Testing and Troubleshooting
Testing Philosophy ......................................................................................................................................U.6.1
Testing Features and Tools..........................................................................................................................U.6.4
Relay Test Connections...............................................................................................................................U.6.8
Test Methods ............................................................................................................................................. U.6.13
Checking Relay Operation ........................................................................................................................U.6.25
Relay Self-Tests......................................................................................................................................... U.6.40
Relay Troubleshooting ..............................................................................................................................U.6.42
Factory Assistance..................................................................................................................................... U.6.46
Appendix A: Firmware and Manual Versions
Firmware..................................................................................................................................................... U.A.1
SELBOOT .................................................................................................................................................... U.A.5
ICD File...................................................................................................................................................... U.A.6
Instruction Manual...................................................................................................................................... U.A.7
Appendix B: Firmware Upgrade Instructions
Overview .....................................................................................................................................................U.B.1
Upgrade Procedure......................................................................................................................................U.B.2
Troubleshooting.........................................................................................................................................U.B.10
Factory Assistance.....................................................................................................................................U.B.11
Applications Handbook
Section 1: Protection Application Examples
Overview .....................................................................................................................................................A.1.1
230 kV Overhead Distribution Line Example.............................................................................................A.1.2
500 kV Parallel Transmission Lines With Mutual Coupling Example.....................................................A.1.18
345 kV Tapped Overhead Transmission Line Example............................................................................A.1.50
EHV Parallel 230 kV Underground Cables Example ...............................................................................A.1.82
Out-of-Step Logic Application Examples............................................................................................... A.1.112
Auto-Reclose Example............................................................................................................................ A.1.129
Auto-Reclose and Synchronism Check Example....................................................................................A.1.132
Circuit Breaker Failure Application Examples ....................................................................................... A.1.142
Section 2: Monitoring and Metering
Circuit Breaker Monitor..............................................................................................................................A.2.1
Station DC Battery System Monitor..........................................................................................................A.2.20
Metering ....................................................................................................................................................A.2.26
Section 3: Analyzing Data
Data Processing........................................................................................................................................... A.3.2
Triggering Data Captures and Event Reports.............................................................................................. A.3.4
Duration of Data Captures and Event Reports............................................................................................ A.3.5
Oscillography ..............................................................................................................................................A.3.7
Event Reports, Event Summaries, and Event Histories.............................................................................A.3.11
SER (Sequential Events Recorder)............................................................................................................A.3.36
Signal Profiling..........................................................................................................................................A.3.39
Section 4: Time-Synchronized Measurements
Relay Configuration for High-Accuracy Timekeeping...............................................................................A.4.1
Fault Analysis..............................................................................................................................................A.4.6
Power Flow Analysis...................................................................................................................................A.4.7
State Estimation Verification.......................................................................................................................A.4.9
Section 5: Bay Control
Overview .....................................................................................................................................................A.5.1
Circuit Breaker Status Logic.......................................................................................................................A.5.2

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Table of Contents
Disconnect Logic......................................................................................................................................... A.5.2
Bay Control Front-Panel Operations.........................................................................................................A.5.13
ACSELERATOR QuickSet SEL-5030 Software Bay Control Screens........................................................A.5.23
Predefined Bay Control One-Line Diagrams............................................................................................A.5.32
Section 6: Substation Automatic Restoration
230 kV Tapped Transmission Line Application Example...........................................................................A.6.1
Section 7: SEL Communications Processor Applications
SEL Communications Processors................................................................................................................ A.7.1
SEL Communications Processor and Relay Architecture........................................................................... A.7.3
SEL Communications Processor Example..................................................................................................A.7.5
Section 8: Direct Network Communication
Direct Network Communication .................................................................................................................A.8.1
Serial Networking........................................................................................................................................A.8.2
Ethernet Card...............................................................................................................................................A.8.4
Direct Networking Example........................................................................................................................A.8.8
Reference Manual
Section 1: Protection Functions
Current and Voltage Source Selection..........................................................................................................R.1.2
Polarizing Quantity for Distance Element Calculations.............................................................................R.1.14
Frequency Estimation.................................................................................................................................R.1.15
Undervoltage Supervision Logic................................................................................................................R.1.17
Over- and Underfrequency Elements.........................................................................................................R.1.19
Time-Error Calculation...............................................................................................................................R.1.21
Fault Location.............................................................................................................................................R.1.23
Open Phase Detection Logic......................................................................................................................R.1.24
Pole Open Logic.........................................................................................................................................R.1.25
Loss-of-Potential Logic..............................................................................................................................R.1.28
Fault Type Identification Selection Logic..................................................................................................R.1.32
Ground Directional Element.......................................................................................................................R.1.32
Phase and Negative-Sequence Directional Elements.................................................................................R.1.43
Directionality..............................................................................................................................................R.1.44
CVT Transient Detection............................................................................................................................R.1.45
Series-Compensation Line Logic...............................................................................................................R.1.46
Load-Encroachment Logic.........................................................................................................................R.1.46
Out-of-Step Logic (Conventional)..............................................................................................................R.1.48
Out-of-Step Logic (Zero Settings)..............................................................................................................R.1.54
Mho Ground Distance Elements ................................................................................................................R.1.69
Quadrilateral Ground Distance Elements...................................................................................................R.1.73
Mho Phase Distance Elements ...................................................................................................................R.1.77
Quadrilateral Phase Distance Elements......................................................................................................R.1.82
Zone Time Delay........................................................................................................................................R.1.88
Instantaneous Line Overcurrent Elements..................................................................................................R.1.91
Inverse-Time Overcurrent Elements...........................................................................................................R.1.96
Over- and Undervoltage Elements............................................................................................................R.1.110
Switch-Onto-Fault Logic..........................................................................................................................R.1.114
Communications-Assisted Tripping Logic...............................................................................................R.1.117
Directional Comparison Blocking Scheme..............................................................................................R.1.118
Permissive Overreaching Transfer Tripping Scheme...............................................................................R.1.121
Directional Comparison Unblocking Scheme Logic................................................................................R.1.130
Trip Logic.................................................................................................................................................R.1.134
Circuit Breaker Failure Protection............................................................................................................R.1.144

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Table of Contents
Section 2: Autoreclosing and Synchronism Check
Autoreclosing ...............................................................................................................................................R.2.2
One-Circuit-Breaker Autoreclosing .............................................................................................................R.2.4
Two-Circuit-Breaker Autoreclosing...........................................................................................................R.2.10
Auto-Reclose Logic Diagrams...................................................................................................................R.2.27
Manual Closing ..........................................................................................................................................R.2.40
Voltage Checks for Autoreclosing and Manual Closing............................................................................R.2.43
Settings and Relay Word Bits for Autoreclosing and Manual Closing......................................................R.2.45
Synchronism Check....................................................................................................................................R.2.49
Section 3: SELOGIC Control Equation Programming
SELOGIC Control Equation History .............................................................................................................R.3.1
Separation of Protection and Automation Areas..........................................................................................R.3.2
SELOGIC Control Equation Programming ...................................................................................................R.3.3
SELOGIC Control Equation Setting Structure ..............................................................................................R.3.6
Multiple Setting Groups...............................................................................................................................R.3.8
SELOGIC Control Equation Capacity.........................................................................................................R.3.11
SELOGIC Control Equation Elements.........................................................................................................R.3.12
SELOGIC Control Equation Operators........................................................................................................R.3.25
Effective Programming...............................................................................................................................R.3.34
SEL-311 and SEL-351 Series Users...........................................................................................................R.3.36
Section 4: Communications Interfaces
Communications Interfaces..........................................................................................................................R.4.1
Serial Communication..................................................................................................................................R.4.2
Ethernet Card................................................................................................................................................R.4.4
Port Settings Mappings...............................................................................................................................R.4.11
Virtual File Interface...................................................................................................................................R.4.13
Communications Database.........................................................................................................................R.4.17
Section 5: SEL Communications Protocols
Serial Port Hardware Protocol......................................................................................................................R.5.1
Software Protocol Selections........................................................................................................................R.5.2
Protocol Active When Setting PROTO := SEL............................................................................................R.5.3
SEL MIRRORED BITS Communications......................................................................................................R.5.11
SEL Distributed Port Switch Protocol (LMD)...........................................................................................R.5.17
SEL-2600 RTD Module Operation ............................................................................................................R.5.19
Simple Network Time Protocol (SNTP) ....................................................................................................R.5.20
Using the Embedded HTTP Server............................................................................................................R.5.22
Cybersecurity Features...............................................................................................................................R.5.25
Section 6: DNP3 Communications
Introduction to DNP3...................................................................................................................................R.6.1
DNP3 in the SEL-421...................................................................................................................................R.6.7
DNP3 Documentation ................................................................................................................................R.6.15
SEL-421-0, -1, -2, -3 to SEL-421-4, -5 Mapping.......................................................................................R.6.42
DNP Serial Application Example...............................................................................................................R.6.52
DNP3 LAN/WAN Application Example....................................................................................................R.6.56
Section 7: Synchrophasors
Overview ......................................................................................................................................................R.7.1
Introduction..................................................................................................................................................R.7.1
Configuring PMU for C37.118 Synchrophasors..........................................................................................R.7.2
Synchrophasor Measurement .....................................................................................................................R.7.13
PMU Control Capabilities..........................................................................................................................R.7.19
PMU Recording Capabilities......................................................................................................................R.7.23
Synchrophasor Legacy Settings..................................................................................................................R.7.25

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Table of Contents
Section 8: IEC 61850 Communications
Features.........................................................................................................................................................R.8.1
Introduction to IEC 61850............................................................................................................................R.8.2
IEC 61850 Operation....................................................................................................................................R.8.3
IEC 61850 Configuration...........................................................................................................................R.8.12
Logical Nodes.............................................................................................................................................R.8.16
Changes from SEL-421-0, -1, -2, -3 to SEL-421-4, -5...............................................................................R.8.35
Protocol Implementation Conformance Statement: SEL-400 Series Devices...........................................R.8.36
ACSI Conformance Statements..................................................................................................................R.8.43
Cybersecurity Features...............................................................................................................................R.8.47
Section 9: ASCII Command Reference
Description of Commands............................................................................................................................R.9.1
Section 10: Settings
Alias Settings..............................................................................................................................................R.10.3
Global Settings...........................................................................................................................................R.10.4
Breaker Monitor Settings .........................................................................................................................R.10.10
Group Settings..........................................................................................................................................R.10.13
Protection Free-Form SELOGIC Control Equations .................................................................................R.10.34
Automation Free-Form SELOGIC Control Equations...............................................................................R.10.35
Notes Settings...........................................................................................................................................R.10.35
Output Settings.........................................................................................................................................R.10.35
Front-Panel Settings.................................................................................................................................R.10.37
Report Settings.........................................................................................................................................R.10.44
Port Settings..............................................................................................................................................R.10.46
DNP3 Settings—Custom Maps................................................................................................................R.10.51
Bay Settings..............................................................................................................................................R.10.52
Appendix A: Relay Word Bits
Alphabetic....................................................................................................................................................R.A.1
Row List ....................................................................................................................................................R.A.34
Appendix B: Analog Quantities
Analog Quantity Changes............................................................................................................................R.B.1
Quantities Listed Alphabetically.................................................................................................................R.B.2
Quantities Listed by Function ...................................................................................................................R.B.13

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Date Code 20150504 SEL-421-4, -5 Relay
List of Tables
User’s Guide
Table 1.1 Application Highlights.....................................................................................................U.1.11
Table 2.1 Recommended Control Input Pickup Settings...................................................................U.2.5
Table 2.2 Required Settings for Use with AC Control Signals..........................................................U.2.6
Table 2.3 I/O Interface Boards Control Inputs.................................................................................U.2.13
Table 2.4 I/O Interface Boards Control Outputs.............................................................................. U.2.13
Table 2.5 Main Board Jumpers........................................................................................................U.2.18
Table 2.6 Main Board Jumpers—JMP2, JMP3, and JMP4.............................................................. U.2.20
Table 2.7 I/O Board Jumpers ...........................................................................................................U.2.24
Table 2.8 Jumper Positions for Breaker OPEN/CLOSE Indication.................................................U.2.25
Table 2.9 Jumper Positions for Arc Suppression.............................................................................U.2.25
Table 2.10 Front-Panel LED Option..................................................................................................U.2.25
Table 2.11 Fuse Requirements for the Power Supply........................................................................U.2.35
Table 3.1 SEL Software Solutions.....................................................................................................U.3.1
Table 3.2 ACSELERATOR QuickSet Applications..............................................................................U.3.2
Table 3.3 ACSELERATOR QuickSet Submenu Options...................................................................... U.3.2
Table 3.4 ACSELERATOR QuickSet HMI Tree View Functions.........................................................U.3.7
Table 3.5 Help..................................................................................................................................U.3.22
Table 4.1 Power Supply Voltage Inputs............................................................................................. U.4.3
Table 4.2 General Serial Port Settings...............................................................................................U.4.5
Table 4.3 SEL-421 Access Levels...................................................................................................... U.4.7
Table 4.4 Access-Level Commands and Passwords .......................................................................... U.4.7
Table 4.5 Settings Classes and Instances .......................................................................................U.4.15
Table 4.6 Actions at Settings Prompts.............................................................................................U.4.17
Table 4.7 Actions at Text-Edit Mode Prompts................................................................................. U.4.20
Table 4.8 Control Inputs in the SEL-421.........................................................................................U.4.67
Table 4.9 SEL-421 Timekeeping Modes..........................................................................................U.4.74
Table 4.10 Date/Time Last Update Sources.......................................................................................U.4.77
Table 4.11 Communications Port Commands That Clear Relay Buffers ..........................................U.4.82
Table 5.1 Front-Panel Inactivity Time-Out Setting............................................................................ U.5.3
Table 5.2 Metering Screens Enable Settings......................................................................................U.5.4
Table 5.3 SER Point Settings.............................................................................................................U.5.8
Table 5.4 Display Point Settings—Boolean.....................................................................................U.5.10
Table 5.5 Display Point Settings—Analog......................................................................................U.5.11
Table 5.6 Display Point Settings—Boolean and Analog Examples ................................................U.5.11
Table 5.7 Front-Panel Pushbutton Functions While Viewing SER Events......................................U.5.20
Table 5.8 Local Bit Control Settings................................................................................................U.5.26
Table 5.9 Local Bit SELOGIC Control Equations............................................................................. U.5.26
Table 5.10 Settings Available From the Front Panel..........................................................................U.5.28
Table 5.11 Front-Panel Target LEDs..................................................................................................U.5.36
Table 5.12 TIME Target LED Trigger Elements—Factory Defaults.................................................U.5.38
Table 5.13 Operator Control Pushbuttons and LEDs—Factory Defaults..........................................U.5.40
Table 6.1 Acceptance Testing ............................................................................................................U.6.2
Table 6.2 Commissioning Testing......................................................................................................U.6.2
Table 6.3 Maintenance Testing ..........................................................................................................U.6.3
Table 6.4 UUT Database Entries for SEL-5401 Relay Test System Software—5 A Relay.............. U.6.7
Table 6.5 UUT Database Entries for SEL-5401 Relay Test System Software—1 A Relay.............. U.6.8
Table 6.6 Phase Instantaneous Overcurrent Pickup......................................................................... U.6.14
Table 6.7 Selectable Operating Quantity Time-Overcurrent Element (51S1) Default Settings ......U.6.21
Table 6.8 Negative-Sequence Directional Element Settings AUTO Calculations...........................U.6.34
Table 6.9 Troubleshooting Procedures.............................................................................................U.6.43
Table A.1 Firmware Revision History...............................................................................................U.A.1

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SEL-421-4, -5 Relay Date Code 20150504
List of Tables
Table A.2 SELBOOT Revision History............................................................................................... U.A.5
Table A.3 SEL-421-5 ICD File Revision History.............................................................................. U.A.6
Table A.4 Instruction Manual Revision History................................................................................ U.A.7
Table B.1 Firmware Upgrade Files.....................................................................................................U.B.2
Applications Handbook
Table 1.1 System Data—230 kV Overhead Transmission Line ........................................................A.1.2
Table 1.2 Secondary Impedances.......................................................................................................A.1.3
Table 1.3 LOP Enable Options...........................................................................................................A.1.6
Table 1.4 Options for Enabling Pole-Open Logic............................................................................A.1.12
Table 1.5 Setting TULO Unlatch Trip Options................................................................................A.1.13
Table 1.6 Settings for 230 kV Overhead TX Example ....................................................................A.1.14
Table 1.7 System Data—500 kV Parallel Overhead Transmission Lines........................................A.1.18
Table 1.8 Secondary Impedances.....................................................................................................A.1.19
Table 1.9 LOP Enable Options.........................................................................................................A.1.24
Table 1.10 Tilt Resulting From Nonhomogeneity .............................................................................A.1.29
Table 1.11 Options for Enabling Pole-Open Logic............................................................................A.1.35
Table 1.12 Trip Unlatch Options........................................................................................................A.1.39
Table 1.13 Settings for 500 kV Parallel TX Example........................................................................A.1.44
Table 1.14 System Data—345 kV Tapped Overhead Transmission Line.......................................... A.1.51
Table 1.15 Secondary Impedances.....................................................................................................A.1.52
Table 1.16 LOP Enable Options......................................................................................................... A.1.57
Table 1.17 Local Zone 2 Fault Impedance Measurements ................................................................ A.1.58
Table 1.18 Apparent Impedance Measurement for Remote Faults....................................................A.1.59
Table 1.19 Options for Enabling Pole-Open Logic............................................................................A.1.73
Table 1.20 Setting TULO Unlatch Trip Options................................................................................A.1.77
Table 1.21 Settings for 345 kV Tapped TX Example........................................................................A.1.78
Table 1.22 System Data—230 kV Parallel Underground Cables...................................................... A.1.83
Table 1.23 Secondary Impedances.....................................................................................................A.1.84
Table 1.24 LOP Enable Options......................................................................................................... A.1.88
Table 1.25 Tilt Resulting From Nonhomogeneity .............................................................................A.1.93
Table 1.26 XAG Measurement for Remote AG Fault (k01 = 0.374 ∠—39.2°, sheath and
ground return path)..........................................................................................................A.1.95
Table 1.27 XAG Measurement for Remote AG Fault (k01 = 0.385 ∠—46.7°, sheath returnpath)...A.1.95
Table 1.28 XAG Measurement for Remote AG Fault (k0 = 6.105 ∠44.5°, ground return path).......A.1.96
Table 1.29 Options for Enabling Pole-Open Logic.......................................................................... A.1.103
Table 1.30 Setting TULO Unlatch Trip Options.............................................................................. A.1.106
Table 1.31 Settings for 230 kV Parallel Cables Example................................................................ A.1.107
Table 1.32 Positive-Sequence Impedances (Secondary).................................................................. A.1.113
Table 1.33 Automatically Calculated/Hidden Settings.................................................................... A.1.121
Table 1.34 Relay Configuration (Group) ......................................................................................... A.1.122
Table 1.35 Out-of-Step Tripping/Blocking...................................................................................... A.1.122
Table 1.36 Automatically Calculated/Hidden Settings.................................................................... A.1.127
Table 1.37 Relay Configuration (Group) ......................................................................................... A.1.128
Table 1.38 Out-of-Step Tripping/Blocking...................................................................................... A.1.128
Table 1.39 Settings for Auto-Reclose Example...............................................................................A.1.132
Table 1.40 Settings for Auto-Reclose and Synchronism Check Example.......................................A.1.140
Table 1.41 Secondary Quantities...................................................................................................... A.1.147
Table 1.42 Settings for Circuit Breaker Failure Example 1.............................................................A.1.151
Table 1.43 Secondary Quantities...................................................................................................... A.1.152
Table 1.44 Settings for Circuit Breaker Failure Example 2.............................................................A.1.158
Table 2.1 Circuit Breaker Monitor Configuration..............................................................................A.2.2
Table 2.2 Circuit Breaker Maintenance Information—Example.......................................................A.2.4
Table 2.3 Contact Wear Monitor Settings—Circuit Breaker 1.......................................................... A.2.4
Table 2.4 Circuit Breaker Monitor Initiate SELOGIC Control Equations........................................... A.2.7
Table 2.5 Circuit Breaker Monitor Close SELOGIC Control Equations.............................................A.2.9
Table 2.6 BRE Command ................................................................................................................ A.2.17

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List of Tables
Table 2.7 DC Monitor Settings and Relay Word Bit Alarms...........................................................A.2.21
Table 2.8 Example DC Battery Voltage Conditions.........................................................................A.2.22
Table 2.9 Example DC Battery Monitor Settings—125 Vdc for Vdc1 and 48 Vdc for Vdc2.........A.2.23
Table 2.10 Example DC Battery Monitor Settings—AC Ripple Voltages.........................................A.2.23
Table 2.11 Example DC Battery Monitor Settings—Ground Detection Factor (EGADVS := Y) ....A.2.24
Table 2.12 MET Command................................................................................................................ A.2.27
Table 2.13 Instantaneous Metering Quantities—Voltages, Currents, Frequency .............................. A.2.28
Table 2.14 Instantaneous Metering Quantities—Powers................................................................... A.2.29
Table 2.15 Relay Word Bits—Power Factor......................................................................................A.2.30
Table 2.16 Instantaneous Metering Accuracy—Voltages, Currents, and Frequency......................... A.2.30
Table 2.17 Instantaneous Metering Accuracy—Power......................................................................A.2.30
Table 2.18 Maximum/Minimum Metering Quantities—Voltages, Currents, Frequency, and
Powers.............................................................................................................................A.2.32
Table 2.19 Demand and Peak Demand Metering Quantities—(LINE).............................................A.2.34
Table 2.20 Rolling Demand Calculations ..........................................................................................A.2.35
Table 2.21 Demand Metering Settings...............................................................................................A.2.37
Table 2.22 Energy Metering Quantities—(LINE)..............................................................................A.2.39
Table 3.1 Report Settings...................................................................................................................A.3.6
Table 3.2 Event Report Nonvolatile Storage Capability.................................................................... A.3.7
Table 3.3 EVE Command ................................................................................................................A.3.13
Table 3.4 EVE Command Examples................................................................................................A.3.13
Table 3.5 Event Report Metered Analog Quantities........................................................................A.3.15
Table 3.6 Event Types......................................................................................................................A.3.31
Table 3.7 SUM Command................................................................................................................A.3.32
Table 3.8 HIS Command..................................................................................................................A.3.34
Table 3.9 SER Commands...............................................................................................................A.3.37
Table 4.1 SEL-421 Voltage and Current Measurement......................................................................A.4.7
Table 5.1 Circuit Breaker and Disconnect Switch Definitions ........................................................A.5.14
Table 5.2 Circuit Breaker State Representations.............................................................................. A.5.15
Table 5.3 Disconnect Switch State Representations........................................................................ A.5.15
Table 6.1 Global Settings...................................................................................................................A.6.6
Table 6.2 Breaker Monitor Settings...................................................................................................A.6.6
Table 6.3 Group Settings....................................................................................................................A.6.6
Table 6.4 Protection Free-Form SELOGIC Control Equations...........................................................A.6.8
Table 6.5 Control Inputs...................................................................................................................A.6.11
Table 6.6 Control Outputs (SELOGIC Control Equations)...............................................................A.6.11
Table 7.1 SEL Communications Processors Protocol Interfaces.......................................................A.7.3
Table 7.2 SEL Communications Processors Port 1 Settings..............................................................A.7.5
Table 7.3 SEL Communications Processor Data Collection Automessages...................................... A.7.6
Table 7.4 Fast Message Read Message Settings................................................................................A.7.6
Table 7.5 SEL Communications Processor Port 1 Automatic Messaging Settings...........................A.7.7
Table 7.6 SEL Communications Processor Port 1 Region Map ........................................................A.7.7
Table 7.7 SEL Communications Processor METER Region Map ....................................................A.7.8
Table 7.8 SEL Communications Processor TARGET Region...........................................................A.7.9
Table 7.9 Communications Processor and Relay Control Bit Correlation.......................................A.7.12
Table 8.1 DNP3 Serial Feature Summary..........................................................................................A.8.2
Table 8.2 Ethernet Connection Options.............................................................................................A.8.4
Table 8.3 Ethernet DNP3 Feature Summary......................................................................................A.8.7
Table 8.4 SEL-421 PORT 5 Direct Networking Settings .................................................................. A.8.9
Reference Manual
Table 1.1 Available Current Source Selection Settings Combinations...............................................R.1.4
Table 1.2 Available Current Source Selection Settings Combinations When ESS := Y,
NUMBK := 1 .....................................................................................................................R.1.4
Table 1.3 Available Current Source Selection Settings Combinations When ESS := Y,
NUMBK := 2 .....................................................................................................................R.1.5
Table 1.4 Available Voltage Source Selection Setting Combinations.................................................R.1.7

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SEL-421-4, -5 Relay Date Code 20150504
List of Tables
Table 1.5 ESS := N, Current and Voltage Source Selection................................................................R.1.8
Table 1.6 ESS := 1, Current and Voltage Source Selection ................................................................R.1.9
Table 1.7 ESS := 2, Current and Voltage Source Selection ................................................................R.1.9
Table 1.8 ESS := 3, Current and Voltage Source Selection ..............................................................R.1.10
Table 1.9 ESS := 4, Current and Voltage Source Selection ..............................................................R.1.11
Table 1.10 ESS := Y, Tapped Line......................................................................................................R.1.13
Table 1.11 ESS := Y, Current Polarizing Source ................................................................................R.1.13
Table 1.12 VMEMC Relay Setting.....................................................................................................R.1.15
Table 1.13 Frequency Measurement and Frequency Tracking Ranges...............................................R.1.16
Table 1.14 Frequency Estimation........................................................................................................R.1.17
Table 1.15 Voltage and Breaker Pole Correlation...............................................................................R.1.17
Table 1.16 Frequency Estimation Outputs..........................................................................................R.1.17
Table 1.17 Time-Error Calculation Inputs and Outputs......................................................................R.1.21
Table 1.18 Fault Location Triggering Elements..................................................................................R.1.23
Table 1.19 Fault Type..........................................................................................................................R.1.23
Table 1.20 Fault Location Settings......................................................................................................R.1.24
Table 1.21 Fault Location Relay Word Bit .........................................................................................R.1.24
Table 1.22 Open Phase Detection Relay Word Bits............................................................................R.1.24
Table 1.23 Pole Open Logic Settings..................................................................................................R.1.25
Table 1.24 EPO Setting Selections......................................................................................................R.1.25
Table 1.25 Pole Open Logic Relay Word Bits....................................................................................R.1.25
Table 1.26 LOP Logic Setting.............................................................................................................R.1.29
Table 1.27 LOP Logic Relay Word Bits .............................................................................................R.1.29
Table 1.28 Fault Type Identification Logic Settings...........................................................................R.1.32
Table 1.29 FIDS Relay Word Bits.......................................................................................................R.1.32
Table 1.30 Directional Elements Supervising Ground Elements........................................................R.1.32
Table 1.31 Ground Directional Element Settings ...............................................................................R.1.33
Table 1.32 Ground Directional Element Settings AUTO Calculations...............................................R.1.34
Table 1.33 Ground Directional Element Enables................................................................................R.1.36
Table 1.34 Ground Directional Element Relay Word Bits..................................................................R.1.37
Table 1.35 Reference Table for Figure 1.24, Figure 1.25, and Figure 1.26........................................R.1.40
Table 1.36 Vector Definitions for Equation 1.1 through Equation 1.11..............................................R.1.41
Table 1.37 Phase and Negative-Sequence Directional Elements Relay Word Bits ............................R.1.43
Table 1.38 Zone Directional Settings..................................................................................................R.1.45
Table 1.39 CVT Transient Detection Logic Setting............................................................................R.1.45
Table 1.40 CVT Transient Detection Logic Relay Word Bit..............................................................R.1.45
Table 1.41 Series-Compensation Line Logic Relay Settings..............................................................R.1.46
Table 1.42 Load-Encroachment Logic Relay Settings........................................................................R.1.47
Table 1.43 Load-Encroachment Logic Relay Word Bits....................................................................R.1.48
Table 1.44 OOS Logic Relay Settings................................................................................................R.1.50
Table 1.45 OOS Logic Relay Word Bits.............................................................................................R.1.51
Table 1.46 Input/Output Combinations of the Pole-Open OOS Blocking Logic ...............................R.1.64
Table 1.47 Mho Ground Distance Element Settings...........................................................................R.1.70
Table 1.48 Mho Ground Distance Elements Relay Word Bits............................................................R.1.70
Table 1.49 Differences Between the Adaptive Right Resistance Blinder and the Existing
Resistance Blinder............................................................................................................R.1.74
Table 1.50 Quadrilateral Ground Distance Element Settings.............................................................R.1.74
Table 1.51 Quadrilateral Ground Distance Elements Relay Word Bits..............................................R.1.75
Table 1.52 Mho Phase Distance Element Settings..............................................................................R.1.78
Table 1.53 Mho Phase Distance Elements Relay Word Bits...............................................................R.1.78
Table 1.54 High-Speed and Conventional Element Directional Setting Summary ............................R.1.82
Table 1.55 Quadrilateral Phase Distance Element Settings................................................................R.1.86
Table 1.56 Quadrilateral Phase Distance Elements Relay Word Bits.................................................R.1.86
Table 1.57 Zone Delay Settings..........................................................................................................R.1.89
Table 1.58 Zone Time Delay Relay Word Bits...................................................................................R.1.89
Table 1.59 Phase Overcurrent Element Settings.................................................................................R.1.91
Table 1.60 Negative-Sequence Overcurrent Element Settings............................................................R.1.92
Table 1.61 Residual Ground Overcurrent Element Settings...............................................................R.1.92

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Date Code 20150504 SEL-421-4, -5 Relay
List of Tables
Table 1.62 Phase Instantaneous/Definite-Time Line Overcurrent Relay Word Bits...........................R.1.93
Table 1.63 Negative-Sequence Instantaneous/Definite-Time Line Overcurrent Relay Word Bits.....R.1.93
Table 1.64 Residual Ground Instantaneous/Definite-Time Line Overcurrent Relay Word Bits.........R.1.93
Table 1.65 Selectable Current Quantities............................................................................................R.1.97
Table 1.66 Selectable Inverse-Time Overcurrent Settings..................................................................R.1.97
Table 1.67 Selectable Inverse-Time Overcurrent Relay Word Bits ....................................................R.1.98
Table 1.68 Equations Associated With U.S. Curves...........................................................................R.1.99
Table 1.69 Equations Associated With IEC Curves............................................................................R.1.99
Table 1.70 Available Input Quantities...............................................................................................R.1.111
Table 1.71 SOTF Settings .................................................................................................................R.1.115
Table 1.72 SOTF Relay Word Bits....................................................................................................R.1.115
Table 1.73 ECOMM Setting .............................................................................................................R.1.117
Table 1.74 DCB Settings...................................................................................................................R.1.120
Table 1.75 DCB Relay Word Bits.....................................................................................................R.1.120
Table 1.76 POTT Settings.................................................................................................................R.1.124
Table 1.77 POTT Relay Word Bits ...................................................................................................R.1.125
Table 1.78 DCUB Settings................................................................................................................R.1.131
Table 1.79 DCUB Relay Word Bits..................................................................................................R.1.132
Table 1.80 Additional Settings for Single Pole Tripping (SPT) .......................................................R.1.134
Table 1.81 Setting TULO Unlatch Trip Options...............................................................................R.1.136
Table 1.82 Trip Logic Settings..........................................................................................................R.1.137
Table 1.83 Trip Logic Relay Word Bits............................................................................................R.1.142
Table 1.84 Circuit Breaker Failure Protection Logic Settings..........................................................R.1.150
Table 1.85 Circuit Breaker Failure Relay Word Bits........................................................................R.1.151
Table 2.1 Auto-Reclose Logical States for Circuit Breaker 1.............................................................R.2.4
Table 2.2 One-Circuit-Breaker Three-Pole Reclosing Initial Settings................................................R.2.8
Table 2.3 One-Circuit-Breaker Single-Pole Reclose Initial Settings..................................................R.2.8
Table 2.4 One Circuit Breaker Modes of Operation...........................................................................R.2.8
Table 2.5 Dynamic Leader/Follower Settings...................................................................................R.2.16
Table 2.6 Leader/Follower Selection ................................................................................................R.2.18
Table 2.7 Example One: Reset and 79CY3 States............................................................................R.2.18
Table 2.8 Example One: Lockout State.............................................................................................R.2.18
Table 2.9 Example One: Reset State After Reclaim Time................................................................R.2.19
Table 2.10 Leader/Follower Selection ................................................................................................R.2.19
Table 2.11 Example Two: Initial Reset State......................................................................................R.2.20
Table 2.12 Example Two: Final Reset State .......................................................................................R.2.20
Table 2.13 Leader/Follower Selection ................................................................................................R.2.21
Table 2.14 Example Three: Reset State ..............................................................................................R.2.21
Table 2.15 Example Three: Three-Pole Cycle State...........................................................................R.2.21
Table 2.16 Example Three: Lockout State, BK1 ................................................................................R.2.22
Table 2.17 Leader/Follower Selection ................................................................................................R.2.22
Table 2.18 Two Circuit Breakers: Circuit Breaker BK1 Out of Service.............................................R.2.23
Table 2.19 Two-Circuit-Breaker Three-Pole Reclose Initial Settings.................................................R.2.23
Table 2.20 Two-Circuit-Breaker Single-Pole Reclose Initial Settings................................................R.2.24
Table 2.21 Circuit Breaker BK1 Modes of Operation........................................................................R.2.24
Table 2.22 Circuit Breaker BK2 Modes of Operation........................................................................R.2.25
Table 2.23 Trip Logic Enable Options................................................................................................R.2.26
Table 2.24 Auto-Reclose Logic Settings.............................................................................................R.2.45
Table 2.25 Auto-Reclose Logic Relay Word Bits...............................................................................R.2.47
Table 2.26 Synchronism-Check Relay Word Bits...............................................................................R.2.52
Table 3.1 Advanced SEL-421 SELOGIC Control Equation Features..................................................R.3.1
Table 3.2 SEL-421 SELOGIC Control Equation Programming Summary..........................................R.3.2
Table 3.3 Definitions for Active Setting Group Indication Relay Word Bits SG1 Through SG6 ......R.3.9
Table 3.4 Definitions for Active Setting Group Switching SELOGIC Control Equation
Settings SS1 Through SS6.................................................................................................R.3.9
Table 3.5 Summary of SELOGIC Control Equation Elements ..........................................................R.3.12
Table 3.6 First Execution Bit Operation on Power-Up.....................................................................R.3.13
Table 3.7 First Execution Bit Operation on Automation Settings Change.......................................R.3.13

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List of Tables
Table 3.8 First Execution Bit Operation on Protection Settings Change, Group Switch,
and Source Selection........................................................................................................R.3.13
Table 3.9 SELOGIC Control Equation Variable Quantities ...............................................................R.3.13
Table 3.10 SELOGIC Control Equation Math Variable Quantities......................................................R.3.14
Table 3.11 Latch Bit Quantities ..........................................................................................................R.3.15
Table 3.12 Latch Bit Parameters.........................................................................................................R.3.15
Table 3.13 Conditioning Timer Quantities..........................................................................................R.3.17
Table 3.14 Conditioning Timer Parameters ........................................................................................R.3.17
Table 3.15 Sequencing Timer Quantities............................................................................................R.3.21
Table 3.16 Sequencing Timer Parameters...........................................................................................R.3.21
Table 3.17 Counter Quantities.............................................................................................................R.3.23
Table 3.18 Counter Parameters...........................................................................................................R.3.23
Table 3.19 Operator Precedence from Highest to Lowest ..................................................................R.3.26
Table 3.20 Boolean Operator Summary..............................................................................................R.3.26
Table 3.21 Parentheses Operation in Boolean Equation.....................................................................R.3.27
Table 3.22 NOT Operator Truth Table................................................................................................R.3.27
Table 3.23 AND Operator Truth Table ...............................................................................................R.3.27
Table 3.24 OR Operator Truth Table...................................................................................................R.3.28
Table 3.25 Comparison Operations.....................................................................................................R.3.30
Table 3.26 Math Operator Summary...................................................................................................R.3.30
Table 3.27 Math Error Examples........................................................................................................R.3.31
Table 3.28 SEL-311 Series Relays and SEL-421 SELOGIC Control Equation Programming
Features............................................................................................................................R.3.36
Table 3.29 SEL-311 Series Relays and SEL-421 SELOGIC Control Equation Boolean Operators....R.3.37
Table 4.1 SEL-421 Communications Protocols..................................................................................R.4.1
Table 4.2 EIA-232 Pin Assignments...................................................................................................R.4.3
Table 4.3 Ethernet Card Network Configuration Settings..................................................................R.4.5
Table 4.4 DEFRTR Address Setting Examples...................................................................................R.4.6
Table 4.5 PRP Settings........................................................................................................................R.4.8
Table 4.6 FTP Settings........................................................................................................................R.4.9
Table 4.7 Telnet Settings...................................................................................................................R.4.10
Table 4.8 Serial Port Settings Differences ........................................................................................R.4.11
Table 4.9 Ethernet Port Settings Differences....................................................................................R.4.11
Table 4.10 Virtual File Structure.........................................................................................................R.4.13
Table 4.11 Settings Directory Files.....................................................................................................R.4.15
Table 4.12 REPORTS Directory Files ................................................................................................R.4.15
Table 4.13 EVENTS Directory Files (for Event 10001).....................................................................R.4.16
Table 4.14 SYNCHROPHASORS Directory File Sample .................................................................R.4.16
Table 4.15 SEL-421 Database Regions...............................................................................................R.4.17
Table 4.16 SEL-421 Database Structure—LOCAL Region...............................................................R.4.17
Table 4.17 SEL-421 Database Structure—METER Region...............................................................R.4.18
Table 4.18 SEL-421 Database Structure—DEMAND Region...........................................................R.4.19
Table 4.19 SEL-421 Database Structure—TARGET Region.............................................................R.4.20
Table 4.20 SEL-421 Database Structure—HISTORY Region............................................................R.4.21
Table 4.21 SEL-421 Database Structure—BREAKER Region..........................................................R.4.21
Table 4.22 SEL-421 Database Structure—STATUS Region ..............................................................R.4.22
Table 4.23 SEL-421 Database Structure—ANALOGS Region..........................................................R.4.23
Table 5.1 Hardware Handshaking.......................................................................................................R.5.1
Table 5.2 Supported Serial Command Sets.........................................................................................R.5.2
Table 5.3 Selected ASCII Control Characters.....................................................................................R.5.4
Table 5.4 Compressed ASCII Commands ..........................................................................................R.5.5
Table 5.5 Fast Commands and Response Descriptions.......................................................................R.5.9
Table 5.6 Fast Operate Command Types ............................................................................................R.5.9
Table 5.7 Fast Message Command Function Codes Used With Fast Messages (A546 Message)
and Relay Response Descriptions....................................................................................R.5.10
Table 5.8 Commands in Recommended Sequence for Automatic Configuration............................R.5.10
Table 5.9 MIRRORED BITS Communications Features......................................................................R.5.11
Table 5.10 General Port Settings Used With MIRRORED BITS Communications...............................R.5.15

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Table 5.11 MIRRORED BITS Communications Protocol Settings........................................................R.5.16
Table 5.12 MIRRORED BITS Communications Message Transmission Period....................................R.5.17
Table 5.13 MIRRORED BITS Communications ID Settings for Three-Terminal Application..............R.5.17
Table 5.14 SEL-2885 Initialization String [MODE PREFIX ADDR:SPEED]..................................R.5.18
Table 5.15 RTD Status Bits.................................................................................................................R.5.19
Table 5.16 MET T Command Status Messages..................................................................................R.5.20
Table 5.17 Settings Associated With SNTP........................................................................................R.5.21
Table 5.18 Web Pages and Descriptions.............................................................................................R.5.24
Table 5.19 IP Port Numbers................................................................................................................R.5.25
Table 6.1 DNP3 Implementation Levels.............................................................................................R.6.2
Table 6.2 Selected DNP3 Function Codes..........................................................................................R.6.3
Table 6.3 DNP3 Access Methods........................................................................................................R.6.4
Table 6.4 TCP/UDP Selection Guidelines..........................................................................................R.6.7
Table 6.5 SEL-421 DNP3 Feature Summary......................................................................................R.6.7
Table 6.6 DNP3 Access Methods........................................................................................................R.6.8
Table 6.7 SEL-421 Event Buffer Capacity........................................................................................R.6.10
Table 6.8 SEL-421 Serial Port DNP3 Protocol Settings...................................................................R.6.11
Table 6.9 SEL-421 Ethernet Port DNP3 Protocol Settings...............................................................R.6.12
Table 6.10 SEL-421 DNP Object List.................................................................................................R.6.15
Table 6.11 SEL-421 DNP3 Reference Data Map ...............................................................................R.6.21
Table 6.12 SEL-421 Object 12 Control Operations............................................................................R.6.27
Table 6.13 Object 30, 32, FTYPE Upper Byte-Event Cause..............................................................R.6.30
Table 6.14 Object 30, 32, FTYPE Lower Byte-Affected Phase(s).....................................................R.6.30
Table 6.15 SEL-421 DNP3 Default Data Map....................................................................................R.6.32
Table 6.16 SEL-421 DNP3 Map Settings...........................................................................................R.6.38
Table 6.17 Sample Custom DNP3 Analog Input Map........................................................................R.6.41
Table 6.18 Binary Inputs Point Mapping for MAPSEL = B...............................................................R.6.42
Table 6.19 Binary Inputs Point Mapping for MAPSEL = E...............................................................R.6.43
Table 6.20 Binary Outputs Point Mapping .........................................................................................R.6.43
Table 6.21 Counters Point Mapping....................................................................................................R.6.45
Table 6.22 Analog Inputs Point Mapping...........................................................................................R.6.45
Table 6.23 Analog Outputs Point Mapping.........................................................................................R.6.49
Table 6.24 Binary Outputs Mapping for DNP3 LAN/WAN...............................................................R.6.49
Table 6.25 DNP3 Application Example Data Map.............................................................................R.6.52
Table 6.26 SEL-421 Port 3 Example Settings.....................................................................................R.6.55
Table 6.27 DNP3 LAN/WAN Application Example Protocol Settings..............................................R.6.56
Table 7.1 Global Settings for Configuring the PMU (1 of 2) .............................................................R.7.2
Table 7.2 Global Settings for Configuring the PMU (2 of 2) .............................................................R.7.4
Table 7.3 Voltage Synchrophasor Names............................................................................................R.7.4
Table 7.4 Current Synchrophasor Names............................................................................................R.7.5
Table 7.5 Global Settings for Configuring the PMU ..........................................................................R.7.6
Table 7.6 PM Trigger Reason Bits—IEEE C37.118 Assignments.....................................................R.7.8
Table 7.7 Serial Port 1, 2, 3, F Settings for Synchrophasors...............................................................R.7.9
Table 7.8 Ethernet Port 5 Settings for Synchrophasors.....................................................................R.7.10
Table 7.9 Size of a C37.118 Synchrophasor Message......................................................................R.7.12
Table 7.10 Serial Port Bandwidth for C37.118 Synchrophasors (in Bytes)........................................R.7.12
Table 7.11 Synchrophasor Analog Quantities Measurements............................................................R.7.16
Table 7.12 Synchrophasor Analog Quantities Frequency...................................................................R.7.17
Table 7.13 Global Settings for RTC....................................................................................................R.7.20
Table 7.14 Serial Port Settings for RTC..............................................................................................R.7.20
Table 7.15 Synchrophasor Aligned Analog Quantities.......................................................................R.7.21
Table 7.16 Synchrophasor Client Status Bits......................................................................................R.7.21
Table 7.17 Remote Synchrophasor Data Bits .....................................................................................R.7.22
Table 7.18 PMU Recording Settings...................................................................................................R.7.24
Table 7.19 User-Defined Analog Values Selected by NUMANA Setting........................................................R.7.26
Table 7.20 User-Defined Digital Status Words Selected by the NUMDSW Setting..........................R.7.27
Table 8.1 IEC 61850 Document Set....................................................................................................R.8.2
Table 8.2 Example IEC 61850 Descriptor Components.....................................................................R.8.4

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SEL-421-4, -5 Relay Date Code 20150504
List of Tables
Table 8.3 SEL-421 Logical Devices ...................................................................................................R.8.4
Table 8.4 Buffered Report Control Block Client Access....................................................................R.8.8
Table 8.5 Unbuffered Report Control Block Client Access................................................................R.8.8
Table 8.6 IEC 61850 Settings............................................................................................................R.8.12
Table 8.7 Logical Device: PRO (Protection).....................................................................................R.8.16
Table 8.8 Logical Device: MET (Metering)......................................................................................R.8.22
Table 8.9 Logical Device: CON (Remote Control)...........................................................................R.8.24
Table 8.10 Logical Device: ANN (Annunciation)..............................................................................R.8.26
Table 8.11 SEL Nameplate Data.........................................................................................................R.8.34
Table 8.12 IEC 61850 Functional Changes.........................................................................................R.8.35
Table 8.13 Default Dataset Changes...................................................................................................R.8.35
Table 8.14 Logical Node Mapping Changes.......................................................................................R.8.35
Table 8.15 PICS for A-Profile Support...............................................................................................R.8.37
Table 8.16 PICS for T-Profile Support................................................................................................R.8.37
Table 8.17 MMS Service Supported Conformance............................................................................R.8.37
Table 8.18 MMS Parameter CBB .......................................................................................................R.8.39
Table 8.19 AlternateAccessSelection Conformance Statement..........................................................R.8.40
Table 8.20 VariableAccessSpecification Conformance Statement .....................................................R.8.40
Table 8.21 VariableSpecification Conformance Statement.................................................................R.8.40
Table 8.22 Read Conformance Statement...........................................................................................R.8.41
Table 8.23 GetVariableAccessAttributes Conformance Statement.....................................................R.8.41
Table 8.24 DefineNamedVariableList Conformance Statement.........................................................R.8.41
Table 8.25 GetNamedVariableListAttributes Conformance Statement..............................................R.8.41
Table 8.26 DeleteNamedVariableList Conformance Statement..........................................................R.8.42
Table 8.27 GOOSE Conformance.......................................................................................................R.8.42
Table 8.28 ACSI Basic Conformance Statement................................................................................R.8.43
Table 8.29 ACSI Models Conformance Statement.............................................................................R.8.43
Table 8.30 ACSI Service Conformance Statement.............................................................................R.8.44
Table 8.31 IP Port Numbers................................................................................................................R.8.47
Table 9.1 2AC Command....................................................................................................................R.9.1
Table 9.2 89CLOSE n Command........................................................................................................R.9.2
Table 9.3 89OPEN n Command..........................................................................................................R.9.3
Table 9.4 AAC Command...................................................................................................................R.9.3
Table 9.5 ACC Command...................................................................................................................R.9.3
Table 9.6 BAC Command...................................................................................................................R.9.3
Table 9.7 BNA Command...................................................................................................................R.9.3
Table 9.8 BRE n Command ................................................................................................................R.9.4
Table 9.9 BRE n C and BRE n R Commands.....................................................................................R.9.4
Table 9.10 BRE C A and BRE R A Commands...................................................................................R.9.4
Table 9.11 BRE n H Command.............................................................................................................R.9.4
Table 9.12 BRE n P Command.............................................................................................................R.9.5
Table 9.13 CAL Command...................................................................................................................R.9.5
Table 9.14 CAS Command ...................................................................................................................R.9.5
Table 9.15 CBR Command...................................................................................................................R.9.6
Table 9.16 CBR TERSE Command......................................................................................................R.9.6
Table 9.17 CEV Command...................................................................................................................R.9.6
Table 9.18 CEV ACK Command..........................................................................................................R.9.7
Table 9.19 CEV C Command................................................................................................................R.9.7
Table 9.20 CEV L Command................................................................................................................R.9.7
Table 9.21 CEV Lyyy Command..........................................................................................................R.9.7
Table 9.22 CEV N Command...............................................................................................................R.9.8
Table 9.23 CEV NSET Command........................................................................................................R.9.8
Table 9.24 CEV NSUM Command.......................................................................................................R.9.8
Table 9.25 CEV Sx Command..............................................................................................................R.9.9
Table 9.26 CEV TERSE Command......................................................................................................R.9.9
Table 9.27 CEV Command Option Groups..........................................................................................R.9.9
Table 9.28 CHI Command..................................................................................................................R.9.10
Table 9.29 CHI TERSE Command.....................................................................................................R.9.10

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List of Tables
Table 9.30 CLOSE n Command..........................................................................................................R.9.11
Table 9.31 COM c Command.............................................................................................................R.9.11
Table 9.32 COM c C and COM c R Command..................................................................................R.9.12
Table 9.33 COM c L Command..........................................................................................................R.9.12
Table 9.34 COM RTC c Command.....................................................................................................R.9.13
Table 9.35 COM RTC c C and COM RTC c R Command.................................................................R.9.13
Table 9.36 CON nn Command............................................................................................................R.9.14
Table 9.37 COPY Command...............................................................................................................R.9.14
Table 9.38 CPR Command..................................................................................................................R.9.15
Table 9.39 CSE Command..................................................................................................................R.9.15
Table 9.40 CSE TERSE Command.....................................................................................................R.9.16
Table 9.41 CST Command..................................................................................................................R.9.17
Table 9.42 CSU Command .................................................................................................................R.9.17
Table 9.43 CEV ACK Command........................................................................................................R.9.17
Table 9.44 CSU MB Command..........................................................................................................R.9.18
Table 9.45 CSU N Command..............................................................................................................R.9.18
Table 9.46 CSU TERSE Command....................................................................................................R.9.18
Table 9.47 DATE Command...............................................................................................................R.9.19
Table 9.48 DNA Command.................................................................................................................R.9.19
Table 9.49 DNP Command.................................................................................................................R.9.19
Table 9.50 ETH Command .................................................................................................................R.9.19
Table 9.51 ETH C and ETH R Command...........................................................................................R.9.20
Table 9.52 EVE Command .................................................................................................................R.9.20
Table 9.53 EVE A Command..............................................................................................................R.9.21
Table 9.54 EVE ACK Command........................................................................................................R.9.21
Table 9.55 EVE C Command..............................................................................................................R.9.21
Table 9.56 EVE D Command..............................................................................................................R.9.21
Table 9.57 EVE L Command..............................................................................................................R.9.22
Table 9.58 EVE Lyyy Command........................................................................................................R.9.22
Table 9.59 EVE N Command..............................................................................................................R.9.22
Table 9.60 EVE NSET Command ......................................................................................................R.9.22
Table 9.61 EVE NSUM Command.....................................................................................................R.9.23
Table 9.62 EVE Sx Command............................................................................................................R.9.23
Table 9.63 EVE Command Option Groups.........................................................................................R.9.23
Table 9.64 EVE Command Examples.................................................................................................R.9.24
Table 9.65 EXIT Command................................................................................................................R.9.24
Table 9.66 FILE Command.................................................................................................................R.9.24
Table 9.67 GOOSE Command............................................................................................................R.9.25
Table 9.68 Accessible GOOSE IED Information...............................................................................R.9.25
Table 9.69 GROUP Command............................................................................................................R.9.26
Table 9.70 HELP Command...............................................................................................................R.9.27
Table 9.71 HIS Command...................................................................................................................R.9.27
Table 9.72 HIS C and HIS R Commands............................................................................................R.9.27
Table 9.73 HIS CA and HIS RA Commands......................................................................................R.9.28
Table 9.74 ID Command.....................................................................................................................R.9.28
Table 9.75 IRIG Command.................................................................................................................R.9.29
Table 9.76 LOOP Command...............................................................................................................R.9.30
Table 9.77 LOOP DATA Command....................................................................................................R.9.30
Table 9.78 LOOP R Command...........................................................................................................R.9.31
Table 9.79 MAC Command................................................................................................................R.9.31
Table 9.80 MAP 1 Command..............................................................................................................R.9.31
Table 9.81 MAP 1 Region Command.................................................................................................R.9.32
Table 9.82 MET Command.................................................................................................................R.9.32
Table 9.83 MET AMV Command ......................................................................................................R.9.33
Table 9.84 MET ANA Command.......................................................................................................R.9.33
Table 9.85 MET BAT Command ........................................................................................................R.9.33
Table 9.86 MET D Command.............................................................................................................R.9.34
Table 9.87 MET E Command.............................................................................................................R.9.34

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List of Tables
Table 9.88 MET M Command............................................................................................................R.9.34
Table 9.89 MET PM Command..........................................................................................................R.9.35
Table 9.90 MET PMV Command.......................................................................................................R.9.36
Table 9.91 MET RMS Command.......................................................................................................R.9.36
Table 9.92 MET RTC Command........................................................................................................R.9.36
Table 9.93 MET SYN Command........................................................................................................R.9.37
Table 9.94 MET T Command.............................................................................................................R.9.37
Table 9.95 OAC Command.................................................................................................................R.9.37
Table 9.96 OPEN n Command............................................................................................................R.9.38
Table 9.97 PAC Command..................................................................................................................R.9.38
Table 9.98 PAS level new_password Command.................................................................................R.9.39
Table 9.99 PING Command................................................................................................................R.9.39
Table 9.100 PORT p Command............................................................................................................R.9.40
Table 9.101 PORT KILL n Command..................................................................................................R.9.41
Table 9.102 PRO Command..................................................................................................................R.9.41
Table 9.103 PUL OUTnnn Command ..................................................................................................R.9.42
Table 9.104 QUIT Command................................................................................................................R.9.42
Table 9.105 RTC Command..................................................................................................................R.9.42
Table 9.106 SER Command..................................................................................................................R.9.43
Table 9.107 SER C and SER R Commands..........................................................................................R.9.43
Table 9.108 SER CA and SER RA Commands....................................................................................R.9.44
Table 9.109 SER CV or SER RV Commands.......................................................................................R.9.44
Table 9.110 SER D Command..............................................................................................................R.9.44
Table 9.111 SET Command Overview .................................................................................................R.9.45
Table 9.112 SET A Command..............................................................................................................R.9.45
Table 9.113 SET B Command ..............................................................................................................R.9.46
Table 9.114 SET D Command..............................................................................................................R.9.46
Table 9.115 SET F Command...............................................................................................................R.9.46
Table 9.116 SET G Command..............................................................................................................R.9.47
Table 9.117 SET L Command...............................................................................................................R.9.47
Table 9.118 SET M Command..............................................................................................................R.9.47
Table 9.119 SET N Command..............................................................................................................R.9.47
Table 9.120 SET O Command..............................................................................................................R.9.48
Table 9.121 SET P Command...............................................................................................................R.9.48
Table 9.122 SET R Command ..............................................................................................................R.9.48
Table 9.123 SET T Command...............................................................................................................R.9.49
Table 9.124 SET TERSE Command Examples....................................................................................R.9.49
Table 9.125 SHO Command Overview.................................................................................................R.9.50
Table 9.126 SHO A Command.............................................................................................................R.9.50
Table 9.127 SHO B Command..............................................................................................................R.9.50
Table 9.128 SHO D Command.............................................................................................................R.9.51
Table 9.129 SHO F Command..............................................................................................................R.9.51
Table 9.130 SHO G Command.............................................................................................................R.9.51
Table 9.131 SHO L Command..............................................................................................................R.9.51
Table 9.132 SHO M Command.............................................................................................................R.9.52
Table 9.133 SHO N Command.............................................................................................................R.9.52
Table 9.134 SHO O Command.............................................................................................................R.9.52
Table 9.135 SHO P Command..............................................................................................................R.9.52
Table 9.136 SHO R Command..............................................................................................................R.9.53
Table 9.137 SHO T Command..............................................................................................................R.9.53
Table 9.138 SNS Command..................................................................................................................R.9.53
Table 9.139 STA Command..................................................................................................................R.9.53
Table 9.140 STA A Command..............................................................................................................R.9.54
Table 9.141 STA C and STA R Command............................................................................................R.9.54
Table 9.142 STA S Command...............................................................................................................R.9.54
Table 9.143 STA SC and STA SR Command.......................................................................................R.9.54
Table 9.144 SUM Command.................................................................................................................R.9.55
Table 9.145 SUM ACK Command.......................................................................................................R.9.55

xvii
Date Code 20150504 SEL-421-4, -5 Relay
List of Tables
Table 9.146 SUM N Command.............................................................................................................R.9.55
Table 9.147 TAR Command..................................................................................................................R.9.56
Table 9.148 TAR ALL Command.........................................................................................................R.9.56
Table 9.149 TAR R Command..............................................................................................................R.9.56
Table 9.150 TAR X Command..............................................................................................................R.9.57
Table 9.151 TEC Command..................................................................................................................R.9.57
Table 9.152 TEST DB Command.........................................................................................................R.9.58
Table 9.153 TEST DB OFF Command.................................................................................................R.9.58
Table 9.154 TEST DB2 Command.......................................................................................................R.9.59
Table 9.155 TEST DB2 OFF Command...............................................................................................R.9.59
Table 9.156 TEST FM Command.........................................................................................................R.9.60
Table 9.157 TEST FM DEM Command...............................................................................................R.9.61
Table 9.158 TEST FM OFF Command.................................................................................................R.9.61
Table 9.159 TEST FM PEAK Command .............................................................................................R.9.61
Table 9.160 TIME Command ...............................................................................................................R.9.62
Table 9.161 TIME Q Command............................................................................................................R.9.62
Table 9.162 TRI Command...................................................................................................................R.9.62
Table 9.163 VER Command.................................................................................................................R.9.63
Table 9.164 VIEW 1 Commands—Region...........................................................................................R.9.64
Table 9.165 VIEW 1 Commands—Register Item.................................................................................R.9.64
Table 9.166 VIEW 1 Commands—Bit.................................................................................................R.9.65
Table 10.1 Default Alias Settings........................................................................................................R.10.4
Table 10.2 Global Settings Changes...................................................................................................R.10.4
Table 10.3 Global Settings Categories................................................................................................R.10.4
Table 10.4 General Global Settings ....................................................................................................R.10.5
Table 10.5 Global Enables..................................................................................................................R.10.5
Table 10.6 Station DC1 Monitor (and Station DC2 Monitor) ............................................................R.10.5
Table 10.7 Control Inputs....................................................................................................................R.10.6
Table 10.8 Main Board Control Inputs ...............................................................................................R.10.6
Table 10.9 Interface Board #1 Control Inputs.....................................................................................R.10.7
Table 10.10 Interface Board #2 Control Inputs.....................................................................................R.10.7
Table 10.11 Settings Group Selection...................................................................................................R.10.8
Table 10.12 Data Reset Control............................................................................................................R.10.8
Table 10.13 Frequency Estimation........................................................................................................R.10.8
Table 10.14 Time-Error Calculation .....................................................................................................R.10.9
Table 10.15 Current and Voltage Source Selection...............................................................................R.10.9
Table 10.16 Synchronized Phasor Measurement..................................................................................R.10.9
Table 10.17 Time and Date Management ...........................................................................................R.10.10
Table 10.18 Breaker Monitor Settings Categories..............................................................................R.10.10
Table 10.19 Breaker Configuration.....................................................................................................R.10.11
Table 10.20 Breaker 1 Inputs..............................................................................................................R.10.11
Table 10.21 Breaker 2 Inputs..............................................................................................................R.10.11
Table 10.22 Breaker 1 Monitor (and Breaker 2 Monitor)...................................................................R.10.12
Table 10.23 Breaker 1 Contact Wear (and Breaker 2 Contact Wear)..................................................R.10.12
Table 10.24 Breaker 1 Electrical Operating Time (and Breaker 2 Electrical Operating Time)..........R.10.12
Table 10.25 Breaker 1 Mechanical Operating Time (and Breaker 2 Mechanical Operating Time)....R.10.12
Table 10.26 Breaker 1 Pole Scatter and Pole Discrepancy (and Breaker 2 Pole Scatter and Pole
Discrepancy) ..................................................................................................................R.10.13
Table 10.27 Breaker 1 Inactivity Time Elapsed (and Breaker 2 Inactivity Time Elapsed).................R.10.13
Table 10.28 Breaker 1 Motor Running Time (and Breaker 2 Motor Running Time).........................R.10.13
Table 10.29 Breaker 1 Current Interrupted (and Breaker 2 Current Interrupted)...............................R.10.13
Table 10.30 Group Settings Changes..................................................................................................R.10.13
Table 10.31 Group Settings Categories...............................................................................................R.10.14
Table 10.32 Line Configuration..........................................................................................................R.10.15
Table 10.33 Relay Configuration........................................................................................................R.10.15
Table 10.34 Mho Phase Distance Element Reach...............................................................................R.10.16
Table 10.35 Quadrilateral Phase Distance Element Reach.................................................................R.10.17
Table 10.36 Series Compensation.......................................................................................................R.10.17

xviii
SEL-421-4, -5 Relay Date Code 20150504
List of Tables
Table 10.37 Phase Distance Element Time Delay ..............................................................................R.10.17
Table 10.38 Mho Ground Distance Element Reach............................................................................R.10.18
Table 10.39 Quad Ground Distance Element Reach...........................................................................R.10.18
Table 10.40 Zero-Sequence Compensation Factor .............................................................................R.10.19
Table 10.41 Ground Distance Element Time Delay ...........................................................................R.10.19
Table 10.42 Distance Element Common Time Delay.........................................................................R.10.20
Table 10.43 Switch-Onto-Fault Scheme.............................................................................................R.10.20
Table 10.44 Out-of-Step Tripping/Blocking.......................................................................................R.10.20
Table 10.45 Load Encroachment.........................................................................................................R.10.21
Table 10.46 Phase Instantaneous Overcurrent Pickup........................................................................R.10.22
Table 10.47 Phase Definite-Time Overcurrent Time Delay................................................................R.10.22
Table 10.48 Phase Instantaneous Definite-Time Overcurrent Torque Control...................................R.10.22
Table 10.49 Residual Ground Instantaneous Overcurrent Pickup ......................................................R.10.23
Table 10.50 Residual Ground Definite-Time Overcurrent Time Delay..............................................R.10.23
Table 10.51 Residual Ground Instantaneous Definite-Time Overcurrent Torque Control.................R.10.23
Table 10.52 Negative-Sequence Instantaneous Overcurrent Pickup...................................................R.10.24
Table 10.53 Negative-Sequence Definite-Time Overcurrent Time Delay..........................................R.10.24
Table 10.54 Negative-Sequence Instantaneous Definite-Time Overcurrent Torque Control..............R.10.24
Table 10.55 Selectable Operating Quantity Inverse Time Overcurrent Element 1.............................R.10.25
Table 10.56 Selectable Operating Quantity Inverse Time Overcurrent Element 2.............................R.10.25
Table 10.57 Selectable Operating Quantity Inverse Time Overcurrent Element 3.............................R.10.26
Table 10.58 Zone/Level Direction ......................................................................................................R.10.26
Table 10.59 Directional Control Element...........................................................................................R.10.26
Table 10.60 Pole Open Detection........................................................................................................R.10.27
Table 10.61 POTT Trip Scheme..........................................................................................................R.10.27
Table 10.62 DCUB Trip Scheme ........................................................................................................R.10.28
Table 10.63 DCB Trip Scheme...........................................................................................................R.10.28
Table 10.64 Breaker1Failure Logic(andBreaker2Failure Logic)........................................................R.10.28
Table 10.65 Synchronism-Check Element Reference.........................................................................R.10.30
Table 10.66 Breaker 1 Synchronism Check........................................................................................R.10.30
Table 10.67 Breaker 2 Synchronism Check........................................................................................R.10.30
Table 10.68 Recloser and Manual Closing .........................................................................................R.10.31
Table 10.69 Single-Pole Reclose Settings...........................................................................................R.10.32
Table 10.70 Three-Pole Reclose Settings............................................................................................R.10.32
Table 10.71 Voltage Elements.............................................................................................................R.10.33
Table 10.72 Demand Metering............................................................................................................R.10.33
Table 10.73 Trip Logic........................................................................................................................R.10.33
Table 10.74 Protection Free-Form SELOGIC Control Equations........................................................R.10.35
Table 10.75 Output Settings Categories..............................................................................................R.10.35
Table 10.76 Main Board......................................................................................................................R.10.36
Table 10.77 Interface Board #1...........................................................................................................R.10.36
Table 10.78 Interface Board #2...........................................................................................................R.10.36
Table 10.79 Remote Analog Outputs..................................................................................................R.10.36
Table 10.80 MIRRORED BITS Transmit Equations ..............................................................................R.10.37
Table 10.81 Front-Panel Settings Categories......................................................................................R.10.37
Table 10.82 Front-Panel Settings........................................................................................................R.10.37
Table 10.83 Selectable Screens for the Front Panel............................................................................R.10.42
Table 10.84 Selectable Operator Pushbuttons.....................................................................................R.10.43
Table 10.85 Front-Panel Event Display..............................................................................................R.10.43
Table 10.86 Boolean Display Points...................................................................................................R.10.43
Table 10.87 Analog Display Points.....................................................................................................R.10.44
Table 10.88 Local Control...................................................................................................................R.10.44
Table 10.89 Local Bit SELOGIC..........................................................................................................R.10.44
Table 10.90 Report Settings Categories..............................................................................................R.10.44
Table 10.91 SER Chatter Criteria........................................................................................................R.10.45
Table 10.92 SER Points.......................................................................................................................R.10.45
Table 10.93 Signal Profile...................................................................................................................R.10.45
Table 10.94 Event Reporting...............................................................................................................R.10.45