What is the minimum level of current displayed by Micrologic trip units on Powerpact M, P, and R frame and Masterpact breakers
Issue:
Inaccurate reading on the LCD Display of the Ammeter trip unit
Product Line:
Circuit breaker
Resolution:
With current flow between 0 and 20% of sensor value, the ammeter may not be accurate.
Even with external power supplied, current through the circuit breaker must exceed 0.20 x In for the ammeter reading to be accurate to within 1.5%.
> Below 0.1 x In, measurements are not significant
> Between 0.1 x In and 0.2 x In, accuracy changes linearly from 4% to 1.5%
> Between 0.2 x In and 1.2 x In, accuracy = 1.5%
Inaccurate reading on the LCD Display of the Ammeter trip unit
Product Line:
Circuit breaker
Resolution:
With current flow between 0 and 20% of sensor value, the ammeter may not be accurate.
Even with external power supplied, current through the circuit breaker must exceed 0.20 x In for the ammeter reading to be accurate to within 1.5%.
> Below 0.1 x In, measurements are not significant
> Between 0.1 x In and 0.2 x In, accuracy changes linearly from 4% to 1.5%
> Between 0.2 x In and 1.2 x In, accuracy = 1.5%
Released for: Schneider Electric USA
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