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    INTERNAL -- QO or HOM CAFI or DF breaker trips when power is restored

    INTERNAL

    Product Line:

    QO-CAFI QO-DF, HOM-CAFI, HOM-DF

    Resolution:
    There are at least three possible causes for these breakers tripping when power is restored.
    1. Inrush current from excessive current when circuits are first energized.
      Time-Saver diagnostic test would result in a 5-second trip.
    2. Chaotic current draw resulting from many electronic devices turning on at once resembling arcing fault.
      Time-Saver diagnostic test would result in a 2-second trip.
    3. Utility overvoltage or undervoltage transients, possibly including line frequency deviations and /or missing cycles.
      Time-Saver diagnostic test would result in a 5-second trip (missing cycles 2-second trip). Note that if long distances of wire are used, that could accentuate undervoltages.
      If all the breakers trip, it is likely to be a utility event since it is the only thing common to all breakers.

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