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What does the ``In`` on micrologic trip units mean?

In is the sensor amp rating. The following is a list of all the various nomenclatures used:
In=sensor rating
Io=adjustment without rating plug
Ir=long time pickup
tr=long time delay
Isd=short time pickup
tsd=short time delay
Ig=ground fault pickup
tg=ground fault delay
Ii=instantanous pickup

CTA-ID : 2012074
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