SSC JE Electrical Engineering 2010 Paper

Question : 4 of 50

Marks: +1, -0

In a 3-phase induction motor starting torque will be maximum when
Where

R_2

is Rotor resistance and

X_2

is rotor reactance.

Solution:

at maximum torque

S_\max=R_2/X_2

At starting torque will be maximum

R_2=X_2

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