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Question for electricians

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  • Question for electricians

    Could someone give me a brief explanation of a what a motor's service factor is and what it means? This is just for my general knowledge, nothing more.

    And use small words- I am a plumber afterall.

  • #2
    Re: Question for electricians

    Service Factor
    The service factor - SF - is a measure of periodically overload capacity at which a motor can operate without overload or damage.

    Example - Service Factor
    A 1 HP motor with a Service Factor - SF = 1.15 can operate at

    1 HP x 1.15

    = 1.15 HP

    without overheating or otherwise damaging the motor if rated voltage and frequency are supplied to the motor.

    Insulation life and bearings life are reduced by the service factor load.
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