Problem # 3 A three phase 5000 hp, 4000 V, 60 Hz, four pole induction motor is operating at 4130 V, 60 Hz, and 67 percent rated load. The breakdown...

Problem # 3

A three phase 5000 hp, 4000 V, 60 Hz, four pole induction motor is

operating at 4130 V, 60 Hz, and 67 percent rated load. The breakdown of

losses for this load are as follows: stator conductors: 12.4 kW. Rotor

conductors: 9.92 kW. Core: 12.44 kW. Stray losses: 10.2 kW. Friction and

windage loss: 18.2 kW. Sketch the power flow map, enter down all the

values and determine (a) shaft speed (b) shaft torque, (c) developed torque

(d) input power to the stator (e) overall efficiency.