Three-phase power at unbalanced load

A three-phase circuit is a combination of three single-phase circuits; therefore, the active and reactive powers of a three-phase circuit are equal to the sum of the individual phases.

Active power:



Calculated active capacity:



Reactive power:



Three-phase full power module:
but the modules of full capacity cannot be summed up

Total power can only be determined in complex form.



When connected by a triangle, we obtain respectively

See also

• Three-phase power at balanced load