railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Transformer Auto Transformer

A single-phase, 22 kVA, 2200/220 V, 50 Hz, distribution transformer is to be connected as an auto-transformer to get an output voltage of 2420 V. Its maximum kVA rating as an auto-transformer is

1

22

2

24.2

3

242

4

2420

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