Date Code 20010719 701 Motor Protection Relay
Section 9
Event Analysis
Introduction
The SEL-701 Relay provides several facilities to analyze the cause of relay
operations. Use these tools to help diagnose the cause of the relay operation and more
quickly restore the protected motor to service. Each tool, listed below, provides
increasing detail regarding the causes of a relay operation.
Front-panel target LEDs
Front-panel display trip messages
Front-panel history data menu
Serial port text and oscillographic event reports
Serial port sequential events recorder (SER) function
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