DOCA0270EN-02

Ground Current Detection

The Ground Current Detection function detects ground currents.

If enabled, this protection function performs the following:

  • Signals a Ground Current Detection Alarm when the ground current exceeds the specified Ground Current Alarm Level

  • Triggers a Ground Current Detection Trip when the ground current exceeds the specified Ground Current Trip Level, for a time longer than the specified Ground Current Trip Delay

Ground Current Trip and Alarm

I1

Phase 1 Current

I2

Phase 2 Current

I3

Phase 3 Current

I∑

Summation of the Current

I∑s1

Ground Current Alarm Level

I∑s2

Ground Current Trip Level

A

Ground Current Alarm

B

Ground Current Trip

T

Ground Current Trip Delay

   
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