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For three phase supply through AC transmission lines what does V and I stand for in the equation P = \(\sqrt3\)VI cos θ?

For three phase supply through AC transmission lines what does V and I stand for in the equation P = \(\sqrt3\)VI cos θ? Correct Answer line value

A three phase electric supply through AC transmission lines is given by the equation P = 3VphIph cos θ. Here Vph and Iph are the phase values of voltage and current; cos θ is the power factor. In delta connection of supply Vph = VL and Iph = IL/\(\sqrt3\). In star connection of supply Iph = IL and Vph = VL/\(\sqrt3\). Substituting these values we get the equation P = \(\sqrt3\)VLILcos θ, irrespective of star or delta connection.

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