Determine two-wattmeter method of measurement, Physics

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(a) Show that the total power in a 3-phase, 3-wire system using the two-wattmeter method of measurement is given by the sum of the wattmeter readings. Draw a connection diagram.

(b) Draw a phasor diagram for the two-wattmeter method for a balanced load.

(c) Use the phasor diagram of part (b) to derive a formula from which the power factor of a 3-phase system may be determined using only the wattmeter readings.

 


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