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watt-hour meter: finding revolutions per minute?

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  1. Bradfoxthelegend is offline Junior Member Pro Subscriber
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    watt-hour meter: finding revolutions per minute?

    This is the question from the test:

    If a watt-hour meter has a disk constant of 3.6 is used with 600:5 ampere current transformers and 20:1 potential transformers, the primary Kh is?

    The answers are in revolutions per minute. How do I get to revolutions per minute without knowing any of the output values?

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    Watthour Meter

    Quote Originally Posted by Bradfoxthelegend View Post
    This is the question from the test:

    If a watt-hour meter has a disk constant of 3.6 is used with 600:5 ampere current transformers and 20:1 potential transformers, the primary Kh is?

    The answers are in revolutions per minute. How do I get to revolutions per minute without knowing any of the output values?
    =3.6*(600/5)*(20/1)
    =8640

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    Thank you

    Quote Originally Posted by Skyehaven40 View Post
    =3.6*(600/5)*(20/1)
    =8640
    I have been looking for a way to answer that question for quite a bit. So simple and straight forward, Thank you

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