How do you calculate three phase power?

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How do you calculate three phase power?

Ok, so single phase to ground is easy. Phase to phase on a 120º phase shift system is V x square root of 3. What about three phase?

2006-07-08 04:17:49 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Engineering

2 answers

Looks like you are calculating voltage not power. If it is Delta wound then phase voltage = line voltage. If it is Wye wound then phase voltage = Sqrt 3 * line voltage.

2006-07-08 04:22:40 · answer #1 · answered by Norm 5 · 0⤊ 0⤋

kW = I*E*rt3*PF/1000
I = Amps
E=V
rt3=1.732
PF=Power Factor (generally .8 for inductive circuits)

2006-07-09 02:55:27 · answer #2 · answered by Bazza66 3 · 0⤊ 0⤋