Question: A 3 - phase, 5 0 Hz , 6 pole induction motor delivers useful power of 2 5 kW while running at a speed of

A 3-phase, 50 Hz,6 pole induction motor delivers useful power of 25 kW while running
at a speed of 950 rpm. It is connected to a supply of 400 Vand takes a current of 60 A. Its
stator resistance per phase is 0.14 Ohms. Mechanical losses are 900 W. Calculate:
1. The load torque
2. The developed torque
3. The rotor copper losses
4. The core losses
5. The overall efficiency

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