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

[eveares]

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.

 

[JohnW2]

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?

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

 

[eveares]

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

Thanks for the obvious.

 

[DetlefSchmitz]

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

 

[JohnW2]

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

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

 

[mwatsonxx]

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

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

 

[JohnW2]

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

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

Kind Regards, John

 

[mwatsonxx]

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

Kind Regards, John

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

 

[JohnW2]

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

I see.

Are you perhaps talking about posts like ...

No he keeps cattle in his living room.

Kind Regards, John