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How is the Long Time (current rating) of an NW/NT breaker with the Micrologic trip unit determined?


Issue:
Long Time setting determined

Product Line:
Circuit Breakers

Environment:
Applies to NW/NT breakers with micrologic trip units.

Cause:
Need to clarify or know what long time setting is set at?

Resolution:
The current rating (Ir ) is the long-time pickup setting multiplied by the sensor plug amperage (In ). If the current exceeds this value for longer than the long-time delay time, the circuit breaker will trip.


CTA-ID : 7986
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