railway RRB JE (CBT I + CBT II) Mock Test 2024 Estimation and Costing

What should be the insulation resistance of the LV side of the 1600 kVA, 20 kV/400 V three-phase transformer at 30ºC?

1

15 MΩ

2

189.39 MΩ

3

375 MΩ

4

29.7 MΩ

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