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GFM250 with KC...G method of neutral sensing. Why does the primary current through NCT alone power the module to trip the associated circuit breaker? The concern is in trying to design a Modified Differencial Ground Fault (MDGF) scheme.

That is the design Square D choose to use. This design detects miss wired neutrals. This method does not work with MDGF systems.


CTA-ID : 15410
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