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SEL-421 Relay
Date Code 20090715
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.10
Applications Handbook
Section 1: Protection Application Examples
Section 2: Monitoring and Metering
Section 4: Time-Synchronized Measurements
Section 5: Substation Automatic Restoration
Section 6: SEL Communications Processor Applications
Summary of Contents for 421
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