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A single phase transformer of 2000/200 V having rated l.v. current of 100 A has to undergo short circuit test on l.v. side. Which of the below instruments range should be used?

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A single phase transformer of 2000/200 V having rated l.v. current of 100 A has to undergo short circuit test on l.v. side. Which of the below instruments range should be used?

(a) 200V,10A

(b) 20V, 10A

(c) 300V,100A

(d) 200V,50A

The question was posed to me in final exam.

This question is from Open Circuit and Short Circuit Test in chapter Transformers of Electrical Machines

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Right answer is (a) 200V,10A

The explanation: Short circuit test is conducted on h.v. side, so the measuring instruments will be on the l.v. side.

             Rated current on the h.v. will be 10A and voltage will be around 5-12% to account for winding losses.

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