Q) State the expression of power factor of 3 phase circuit using two wattmeter reading. How will
be the wattmeter reading at unity & 0.5 power factor?
(2+2)
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In this, we have to prove that the power measured by the two wattmeter i.e. the sum of the two wattmeter readings is equal to root 3 times of the phase voltage and line voltage (√3VLIL Cosϕ) which is the actual power consumed in a 3 phase balanced load.
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