1.

If use auto transformer method starting to start an induction motor to replace star-delta method, then the required tapping on the transformer will be _________(a) 57.73%(b) 86.7%(c) 57%(d) 66.66%I had been asked this question at a job interview.I'm obligated to ask this question of Principle of Operation topic in chapter Induction Machines of Electrical Machines

Answer»

The CORRECT ANSWER is (a) 57.73%

To ELABORATE: K = 1/1.73 = 57.73%.



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