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Masterpact NW Ground fault is failing the secondary-injection test when breaker is racked into the cradle and FFTK is used. Breaker test fine when breaker racked out of cradle/cell. Breaker is connected to MDGF system.<br />

The full function test kit will only test residual equipment ground-fault protection. Breakers configured for Modified Defferential Ground Fault (MDGF) and Ground Source Return cannot be secondary-injection tested. The solution is to rack breaker out of cradle/cell to isolate from the MDGF system. If it is a fixed breaker, then remove MDGF wiring from terminals M1, M2 and M3 while using the FFTK (Full Function Test Kit).


CTA-ID : 2021361
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