corribo
Apr 5, 2009, 04:42 PM
Masterpact M16H1 ACB, with STR38S Trip Unit. In=1600A.
I'm aware that the trip unit may not function correctly while detecting currents below 20% of rated current. But my specific question is, could these conditions while causing the STR38S Trip Unit to malfunction, actually cause the unit to trip. As an example, chosen settings Io x In x Ir = approx. 1414A. With average amps per phase at approx. 80A, it is accepted that the Trip Unit may not follow the current/time curve settings. But could these conditions contribute to the unit tripping?
I'm aware that the trip unit may not function correctly while detecting currents below 20% of rated current. But my specific question is, could these conditions while causing the STR38S Trip Unit to malfunction, actually cause the unit to trip. As an example, chosen settings Io x In x Ir = approx. 1414A. With average amps per phase at approx. 80A, it is accepted that the Trip Unit may not follow the current/time curve settings. But could these conditions contribute to the unit tripping?