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For the application requiring high starting torque and minimum starting current, the most suitable starting method will be?

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For the application requiring high starting torque and minimum starting current, the most suitable starting method will be?

(a) Auto transformer starting method

(b) Reactance starting method

(c) DOL method

(d) Star-Delta method

I got this question by my college professor while I was bunking the class.

This interesting question is from Starting of Polyphase Induction Motors-I in chapter Starting of Induction Motors of Electrical Machines

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Best answer
Correct answer is (a) Auto transformer starting method

The explanation is: Auto transformer provides the maximum starting torque.

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