Question: A 4 - pole 4 1 5 V 3 - phase, 5 0 Hz induction motor runs at 1 4 4 0 rpm at 0

A 4-pole 415 V 3-phase, 50 Hz induction motor runs at 1440 rpm at 0.88 pf lagging and delivers 10.817 kW . The stator loss is 1060 kW and the friction and windage losses are 375W.Calculate:
i. Slip
ii. Rotor copper loss
iii. Line current
iv. The motor efficiency
A 4 - pole 4 1 5 V 3 - phase, 5 0 Hz induction

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