Question: A three phase, 4 - wire system supplies power at 4 0 0 V L - L . If the lamps in use require 7

A three phase, 4-wire system supplies power at 400 V L-L. If the lamps in use require 70,84 and33A in each of the three lines, what should be the current in the neutral wire? If a three phase motoris now started, taking 200 A from the lines at a power factor of 0.2 lagging. What should be thetotal current in each line and the neutral wire. Find also the total power supplied to the lamps andthe motor.

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