# Electrical Power

Discussion in 'General Electronics Chat' started by rhaindlhiz, Apr 17, 2013.

1. ### rhaindlhiz Thread Starter New Member

Sep 3, 2009
18
0
Good Day,

I am hoping that someone is kind enough to teach me how find the True Power in Watts when Reactive Power in VAR is given in a 3 Phase power 440 Volts system. I need to know the formula. Thanks in advance!

2. ### WBahn Moderator

Mar 31, 2012
18,085
4,917
You don't know. It's like asking for a formula for how many gallons of gas you need if your car gets 25 miles to the gallon. The two are related, but you lack a piece of information to tie it all together.

In this case, you need either the power factor or the apparent power.

3. ### rhaindlhiz Thread Starter New Member

Sep 3, 2009
18
0
Sorry for the lack of data to my query. Here are the other info: 2,040 KVA, 87% pf and 440 volts 3 phase system. Thank you for your attention!

4. ### WBahn Moderator

Mar 31, 2012
18,085
4,917
So you don't need the VARs. Real power (W) is the apparent power (VA) times the power factor.