Question

2. A Y-connected 100 hp 440 V, 8-pole (class B) induction motor was tested to determine its equivalent circuit parameters. Test results are given below: No load test: 440 V,

60 Hz, 40 A, 4.2 kW Blocked rotor test: 100 V, 60 Hz, 140 A, 8 kW DC test: 8 V, 48 A a) Determine the parameters of the equivalent circuit. b) The motor is connected to a 3-phase 440 V, 60 Hz supply and runs at 870 rpm.Determine the input current, input power, air gap power, rotor copper losses,converted power, and efficiency.

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