A 3-phase squirrel cage induction motor has a full-load efficiency of ___

A 3-phase squirrel cage induction motor has a full-load efficiency of 0.8 and a maximum efficiency of 0.9.

It is operated at a slip of 0.6 by applying a reduced voltage.

The efficiency of the motor at this operating point is

A. less than 0.4
B. greater than 0.6
C. in the range of 0.8 ± 0.1
D. none of the above.

Show Answer

Answer: C

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