Question: A three phase, 4 0 0 V , star connected synchronous motor takes 2 4 A at full load and unity power factor. The motor

A three phase, 400 V, star connected synchronous motor takes
24 A at full load and unity power factor. The motor has per phase armature resistance of 0.2. Determine the following at 0.9 pf lagging
i. Phase current ii. Input power
iii. Total Copper Loss iv. Mechanical power developed and v. Efficiency of the motor

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