How do you calculate the complex power phase angle (φ) for reactive power calculations?

Discussion in 'Electrics UK' started by eveares, 15 Oct 2017.

  1. eveares

    eveares

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    I know you can find reactive power out from the alternative formula below, but using the formula "P(W) = V(V) × I(A) × cos φ", how do you obtain the complex power phase angle (φ) from knowing the Voltage, Power and Current?


    Alternative formula: Reactive Power=√ (Apparent Power²– True power²)

    Regads: Elliott.
     
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  3. JohnW2

    JohnW2

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    If you are literally asking what you have written, you can surely rearrange that equation to achieve what you ask, can't you? However, in case you I'm over-estimating you ...

    cos φ = P(W) / [ V(V) × I(A)]

    Kind Regards, John
     
  4. eveares

    eveares

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    Now I feel really stupid :notworthy::censored:, of course you can reverse the formula. I think I better go to the doctor and get by brain checked out! :rolleyes:

    Thanks for the obvious.
     
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  5. DetlefSchmitz

    DetlefSchmitz

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    Of course the final hurdle is how to do arccos on the windows calculator. (inv cos)
     
  6. JohnW2

    JohnW2

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    It might not be the final hurdle - we don't know what he plans to do with it if/when he manages to calculate it :)

    Kind Regards, John
     
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  8. mwatsonxx

    mwatsonxx

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    I just knew it would be another of your pointless responses.
     
  9. JohnW2

    JohnW2

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    ... and the point of this one of yours is?

    Kind Regards, John
     
  10. mwatsonxx

    mwatsonxx

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    To point out that the majority of your responses are do not contribute anything useful.
     
  11. JohnW2

    JohnW2

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    I see.

    Are you perhaps talking about posts like ...
    :?:

    Kind Regards, John
     
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  12. DIYnot Local

    DIYnot Local

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