A 3-phase induction motor taking a line current of 200 A, is started by direct switching. If an auto transformer of with 50% tapping is made to be used, the motor line current and supply line current will be respectively?(a) 100, 50(b) 50, 100(c) 50, 200(d) 50*1.73, 200I have been asked this question in an interview for job.My doubt stems from Applications of Polyphase Induction Motors in section Induction Machines of Electrical Machines

A 3-phase induction motor taking a line current of 200 A, is started b

1.	A 3-phase induction motor taking a line current of 200 A, is started by direct switching. If an auto transformer of with 50% tapping is made to be used, the motor line current and supply line current will be respectively?(a) 100, 50(b) 50, 100(c) 50, 200(d) 50*1.73, 200I have been asked this question in an interview for job.My doubt stems from Applications of Polyphase Induction Motors in section Induction Machines of Electrical Machines
Answer» CORRECT answer is (a) 100, 50 Explanation: The motor LINE CURRENT will reduce by a FOLD of four times and the line current by half.

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