Frequently asked questions
What is the replacement part for the trip unit interlock of a Masterpact NW breaker?
28 September 2021Issue:
Broke the white trip unit interlock behind the trip unit. Masterpact NW. NW breaker trips when it OPENS and red button pops out but no Ap light comes on. Does not trip when it closes.
Masterpact NW Circuit Breaker
Replace the trip unit base, part number 47947. This part is available only to Square D/Schneider Electric Field Services and they must do the installation.