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    What is the difference between electrically held and mechanically held lighting contactors?

    Issue:
    What is the difference between electrically held and mechanically held lighting contactors?

    Product Line:
    NEMA Lighting Contactors

    Environment:
    Products sold and used in the United States

    Cause:
    Selecting mechanically versus electrically held lighting contactors

    Resolution:
    Electrically held devices require a maintained voltage to the control coil in order for the power contacts to stay closed. Mechanically held devices use a mechanical latch, instead , and therefore have retentive memory . Removal of voltage from the control circuit allows them to operate quietly and consume a very little amount of control power .


     

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