What is the use of MV+MN voltage trip for MCB?

MCB=miniature circuit breaker

Does this accessories protect appliances which are connected to MCB?

THANKS....

2 Answers

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  • 1 month ago
    Favourite answer

    MV is the trip of the Miniature circuit breaker when when an Over Voltage occurs.

    MN is the trip when an under voltage occurs.

    These may be ; for a 240V breaker, MV=280V and

    MN=170V to protect the load which may be a motor.

  • Jim
    Lv 7
    1 month ago

    over voltage is obious

    under voltage means you get over current to maintain same power

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