engineering recuitment UPCL AE (E&M) 2021 Mock Test Electrical Machines Transformer Parallel Operation of Single Phase Transformer
Which of the following is not a necessary condition for parallel operation of transformer:
1
The voltage ratings mentioned on the nameplate of transformers to be connected in parallel must be the same
2
The transformers must be connected in parallel with the correct polarity
3
The X/R ratios of the transformer to be connected in parallel should be equal
4
All of the above