How can we help you today?

Can the MMS kits for Powerpact P and R frame breakers be used on Masterpact NW?

Issue:
Will the Arc Flash Reduction switch MMS work on a Masterpact NW and NT breaker?

Product Line:
Masterpact NW and NT

Resolution:
The Powerpact MMS kits LV429659 for 120 Vac or LV429658 for 24 Vdc will work on the Masterpact breaker. Trip units with A, P, or H functions are required and MMS is not compatible with ZSI.