I know that the total power output of a three phase system is √3 EI cosØ
Where E and I are the line voltage and line current.

Now my question is how can one derive the apparent power equation i.e.. √3 EI from the totalpower equation √3 EI cosØ ?

  • \$\begingroup\$ I don't get it, you already wrote both formulas. \$\endgroup\$ Dec 2, 2015 at 19:47

1 Answer 1


May I introduce, the power triangle: -

enter image description here


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