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    When is a neutral CT required?

    Issue:
    When is a neutral CT required?

    Product Line:

    Environment:

    Cause:


    Resolution:
    A neutral CT is only required when there are loads that produce neutral current.
    A neutral CT is required when an electronic-trip circuit breaker has a ground-fault option (alarm or trip) and is used on a 4 wire system. Neutral current must be factored in with phase current for accurate sensing.
    A neutral CT is also required for the GFM modules when used on a 4-wire system.


    CTA-ID : 1559

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