Question

A 400, 3-phase, 50 Hz, 4 pole induction motor takes a line current of 10 A with 0.86 pf lagging. What is the stator input?

(a) 5.95 kW

(b) 6.95 kW

(c) 4.45 kW

(d) 8.38 kW

This question was addressed to me in an online interview.

My query is from Induction Motor Phasor Diagram topic in portion Induction Machines of Electrical Machines

Answer 1

The correct answer is (a) 5.95 kW

For explanation: P = 1.73*V*I*cosθ = 1.73*400*10*0.86 = 5.958 kW.