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    How to determine with DMM which one is the start winding & which one is run winding

    How to determine with DMM which one is the start winding & which one is run winding in a single phase AC motor ?

    Where to connect the capacitor ?

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    Re: How to determine with DMM which one is the start winding & which one is run windi

    As far as i know ..... run windings have relatively least resistance as compared to start windings ....

    http://images.elektroda.net/38_1334401059.gif



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    Re: How to determine with DMM which one is the start winding & which one is run windi

    The start winding has a high resistance compared to the run winding
    Its best to measure the ohms with a analog multimeter
    The capacitor will be connected in series with the start winding



    •   Alt14th April 2012, 14:48

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    Re: How to determine with DMM which one is the start winding & which one is run windi

    What is centrifugal switch ? why its used here ?
    Where to connect / apply phase & where to neutral ?



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    Re: How to determine with DMM which one is the start winding & which one is run windi

    a centrifugal switch is operated by rotational force.
    it will be in closed position at start of rotation and until a set speed is reached.
    beyond which , it will open.
    the centrifugal switch is connected to aux wndg circuit.
    So that , aux wndg will be connected at satart. when motor is reaching the full speed it will be cut from supply by centrifugal switch.
    you can refer the diagram , attached in the earlier message.



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    Re: How to determine with DMM which one is the start winding & which one is run windi

    if we don't use the centrifugal switch then what might happen ?
    where must be the neutral & phase connected ?



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    Re: How to determine with DMM which one is the start winding & which one is run windi

    Quote Originally Posted by munzir View Post
    if we don't use the centrifugal switch then what might happen ?
    then it will be classified as 'capacitor run' motor type.



    •   Alt14th April 2012, 23:39

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    Re: How to determine with DMM which one is the start winding & which one is run windi

    & with centrifugal switch what type of motor it would be ?



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    Re: How to determine with DMM which one is the start winding & which one is run windi

    Quote Originally Posted by munzir View Post
    & with centrifugal switch what type of motor it would be ?
    capacitor -start motor type.



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    Re: How to determine with DMM which one is the start winding & which one is run windi

    difference between capacitor start motor & capacitor run motor ?

    which one is used in fans ?



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    Re: How to determine with DMM which one is the start winding & which one is run windi

    capacitor run.



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    Re: How to determine with DMM which one is the start winding & which one is run windi

    what's the difference between these two ?

    can we interchange capacitor run motor with capacitor start motor ?



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    Re: How to determine with DMM which one is the start winding & which one is run windi

    if those two satisfies the starting torque , then yes.



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    Re: How to determine with DMM which one is the start winding & which one is run windi

    how can we compare or can check whether they're satisfying the starting torque ?



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    Re: How to determine with DMM which one is the start winding & which one is run windi

    first the HPs and rpms should satisfy. from the specification of the two motors , starting torque is to be satisfied.



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    Re: How to determine with DMM which one is the start winding & which one is run windi

    how to satisfy the starting torque ?



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