A three-phase, 208 V, 25 hp induction motor is supplied with 75 A at a 0.85 PF lagging. lts stator and rotor copper losses are 1867 and 650 W, respectively. Its core losses are 1500 W the friction and...

A three-phase, 208 V, 25 hp induction motor is supplied with 75 A at a 0.85 PF lagging. lts stator and rotor copper losses are 1867 and 650 W, respectively. Its core losses are 1500 W the friction and windage losses are 300W, and the stray losses are negligible. Determine the following (a) The air-gap power (b) The mechanical power developed (c) The shaft output power (d) The efficiency of the motor