Question: A 4 1 0 V , 8 0 Hz , 9 0 hp , three phase induction motor is drawing 1 7 1 . 2

A 410V,80Hz,90 hp, three phase induction motor is drawing 171.276A at a 0.8 pf lagging. The stator copper losses are 11764.1 W, and the rotor copper losses are 7058.46 W. The friction and windage losses are 6805.08 W, the core losses are 4536.72 W, and the stray losses are negligible. Find the following quantities: (N.B. Remember that, in electric machines, the industry convention is that one hp is exactly 746 watts.)(N.B. For this problem, consider that the core losses appear as in a transformer in an Rc in parallel with jXm).(N.B.2. Remember that in a three phase equipment, the rated voltage listed above is line-to-line 410 V.)

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