Three-phase power at balanced load

Active power balanced three-phase receiver:



Reactive:



It is more convenient to express power through linear Il and Il.

With a symmetrical load, the phase powers are the same, therefore:

P = 3Pф = 3UфIфcosφф

Q = 3Qф = 3UфIфsinφф

S = 3Sf = 3UfIf


then



Conclusion: with a symmetrical load, the power formulas are the same regardless of the connection scheme of the receivers.