PF question- hellp

[meeko]

can anyone answer this problem for me, was asked it and i cannot get it right..

an industry has a load of 950kw with 57% PF. what is the value of reactive power flowing and what is the apparent power.

I think-->( va= root(vars^2 + w^2)

am i supposed to assume a voltage of 600v?

 

[davidbeach]

Well, if you don't get the right answer at 600v, you might try 480v or even 208v.

 

[electricpete]

meeko - I don't think you need to know voltage.

Take a look at the power triangle (pf is cos(theta)):

http://www.google.com/imgres?imgurl...GpUejYL4PQqwHc1YDIBg&ved=0CDIQ9QEwAQ&dur=5701

=====================================
(2B)+(2B)' ?

 

[electricpete]

I should clarify, relevant aspect of the figure is relationship between S, P, Q

=====================================
(2B)+(2B)' ?