1MRS 750616-MUM
Directional or Non-Directional Earth-Fault Relay
Technical Reference Manual
REJ 527
17
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The operation directions, forward or reverse, of the directional earth-fault stages can
be selected independently of each other. The directional stages can also be
separately configured to be non-directional.
When the earth-fault current exceeds the set start value of low-set stage I
0
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earth-fault unit will start to deliver a start signal after a ~ 70 ms’ start time. When
the set operate time at definite-time characteristic or the calculated operate time at
IDMT characteristic elapses, the earth-fault unit will deliver a trip signal.
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Summary of Contents for REJ 527
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