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SEL-421 Relay Protection and Automation System

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SEL-421 Relay Protection and Automation System SEL-421 Relay Protection and Automation System Instruction Manual User’s Guide 20111215 *PM421-01-NB* © 2001–2011 by Schweitzer Engineering Laboratories, Inc. All rights reserved. All brand or product names appearing in this document are the trademark or registered trademark of their respective holders. No SEL trademarks may be used without written permission. SEL products appearing in this document may be covered by US and Foreign patents. Schweitzer Engineering Laboratories, Inc. reserves all rights and benefits afforded under federal and international copyright and patent laws in its products, including without limitation software, firmware, and documentation. The information in this manual is provided for informational use only and is subject to change without notice. Schweitzer Engineering Laboratories, Inc. has approved only the English language manual. This product is covered by the standard SEL 10-year warranty. For warranty details, visit www.selinc.com or contact your customer service representative. PM421-01 SEL-421 Relay User’s Guide Date Code 20111215 Table of Contents Table of Contents................................................................................................................................................. i List of Tables ......................................................................................................................................................vii List of Figures................................................................................................................................................... xxi Preface .............................................................................................................................................................. xxxi 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.2.12 Jumpers...................................................................................................................................................... U.2.18 Relay Placement ........................................................................................................................................ U.2.30 Connection................................................................................................................................................. U.2.31 AC/DC Connection Diagrams ................................................................................................................... U.2.50 Section 3: PC Software Installing the Computer Software................................................................................................................ U.3.2 Communications Setup................................................................................................................................ U.3.4 Settings Database Management and Drivers ............................................................................................... U.3.6 Create and Manage Relay Settings.............................................................................................................. U.3.9 Expression Builder .................................................................................................................................... U.3.14 Analyze Events.......................................................................................................................................... U.3.16 HMI Meter and Control............................................................................................................................. U.3.21 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.4.13 Examining Metering Quantities ................................................................................................................ U.4.33 Reading Oscillograms, Event Reports, and SER....................................................................................... U.4.42 Operating the Relay Inputs and Outputs ................................................................................................... U.4.56 Configuring High-Accuracy Timekeeping ................................................................................................ U.4.71 Readying the Relay for Field Application................................................................................................. U.4.79 Section 5: Front-Panel Operations Front-Panel Layout...................................................................................................................................... U.5.2 Front-Panel Menus and Screens ................................................................................................................ U.5.13 Front-Panel Automatic Messages.............................................................................................................. U.5.34 Operation and Target LEDs....................................................................................................................... U.5.36 Front-Panel Operator Control Pushbuttons ............................................................................................... U.5.40 Date Code 20111215 SEL-421 Relay ii 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.6.24 Relay Self-Tests......................................................................................................................................... U.6.38 Relay Troubleshooting .............................................................................................................................. U.6.42 Factory Assistance..................................................................................................................................... U.6.45 Appendix A: Firmware and Manual Versions Firmware..................................................................................................................................................... U.A.1 Instruction Manual.................................................................................................................................... U.A.11 Applications Handbook Section 1: Protection Application Examples Overview ..................................................................................................................................................... A.1.1 230 kV Overhead Transmission 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.1.51 EHV Parallel 230 kV Underground Cables Example ..............................................................................
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