How can we help you today?

Is it possible to defeat or disable ground fault on Masterpact NW with Micrologic 6.0A trip units for primary injection testing?

Issue:
Is there a way to defeat or disable ground fault on a Masterpact NW breaker for primary injection testing?

Product line:
Power circuit breakers

Resolution:
There are two ways to defeat ground fault on the NW breaker for primary injection testing. You can use the hand held test kit, S33594, or the full function test kit, S33595. Or you can use the looping method to counter the single phase current during primary injection testing. See the attached data bulletin 0600DB9901, page 35, for the looping method, or FAQ Looping Method for Testing Breakers with Ground Fault Trip Units