D R1907 Pages: 3

Zr=10<0°, Zy=15<30° and Zp=10< -30°. Find the line currents and neutral
current.
b) The two wattmeters connected to a three phase three wire balanced delta (5)

connected load reads 1154 W and 557 W. Obtain the load impedance if the line
voltage is 141.4V. 1

20 a) Two wattmeters W, and W) are used for measuring power in a three phase (10)
circuit. Prove that the sum of wattmeter readings gives the total power
consumed by the load and the difference of wattmeter readings gives the total

reactive power. Also derive the power factor of the circuit.
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