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

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.
 
eveares said:
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?
Click to expand...
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
 
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.
 
Of course the final hurdle is how to do arccos on the windows calculator. (inv cos)
 
JohnW2 said:
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
Click to expand...

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