Electrical Machines Three Phase Induction Motor

The power input to a 415 V, 50 Hz, 6 pole, 3-ϕ induction motor running at 975 rpm is 40 kW. The stator losses are 1 kW and friction and windage losses total 2 kW. What is the efficiency of motor?

1

92.5%

2

92%

3

90%

4

88%

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