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    How are the trip unit settings determined for a Micrologic trip unit on Masterpact, Powerpact, and legacy circuit breakers?

    Answer
    Issue:
    Trip unit settings for a Micrologic trip unit on Masterpact, Powerpact, and legacy circuit breakers

    Product Line:
    Powerpact P frame, Powerpact R frame, and Masterpact circuit breakers

    Environment:
    Products sold in the United States.

    Cause:
    Maintenance.

    Resolution:
    Masterpact and Powerpact circuit breakers with Micrologic trip units are shipped with the long-time pickup switch set at 1.0 and all other trip unit adjustments set fully counter-clockwise at their lowest settings.
    Actual settings required for a specific application must be determined by a qualified consultant or plant engineer. A coordination study is recommended to provide coordination between all circuit breakers in the distribution system.

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