19 January 2019

Power Triangle ( Active Power , Reactive Power and Apparent Power )

Active Power

  • It is defined as the product of RMS voltage, RMS current and cosine of angle between voltage vector and current vector.

        P = VI Cos F

Reactive power

  • It is defined as the product of RMS voltage, RMS current and cosine of angle between voltage vector and current vector.

        Q = VI Sin F

Apparent power

  • It is defined as the product of RMS voltage, RMS current.

        S = VI
        Therefore
        S = Ö P2 + Q2
           = Ö P2 + Q2

           = Ö ( VI Cos F )2 + ( VI Sin F )2



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