SSC JE Electrical Engineering 2014 Set 1 Paper

Question : 152 of 200

Marks: +1, -0

A 4-pole, 3-phase induction motor runs at 1440 rpm on a 50 Hz supply. Find the slip speed.

Solution:

Slip Speed (S) = Synchronous Speed

(N_S )

– Rotor Speed

(N_r )

(N_S )={120f}/P={120×50}/4=1500

RPM

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