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Is a time delay available for the Masterpact NW/NT undervoltage trip?

FA90869

23 January 2021


Issue:
Need a delay on standard undervoltage relay (UVR) in breaker.

Product:
Circuit Breakers

Environment:
Applies to Masterpact NW/NT breakers.

Cause:
To eliminate circuit breaker nuisance tripping during a temporary voltage dips, operation of the undervoltage trip (MN/UVR) delayed.  This function is achieved by adding a external delay unit (either adjustable or non-adjustable) to the undervoltage trip (MN/UVR) circuit.

Resolution:
Yes. Time delay modules can be used with the NW/NT UVR in the following voltages:

Adjustable (adjustable with dial on the front via pocket screw driver):
 
VoltsCat #
48-60 Vac/dcS33680
100-130 Vac/dcS33681
200-240 Vac/dcS33682
380-480 Vac/dcS33683


Non-adjustable:
 
VoltsCat #
100-130 Vac/dcS33684
200-240 Vac/dcS33685