engineering recuitment RVUNL JEn (RSEB) Mock Tests 2025 Electrical Machines Transformer Parallel Operation of Three Phase Transformers
Which of the following condition is not essential for the parallel operation of two 3-ϕ transformer?
1
Same voltage ratio and same voltage referring to the primary ratio and same voltage the transformer to be connected in parallel.
2
The phase displacement between primary and secondary must be the same for all transformers connected in parallel.
3
The polarity may be different.
4
The phase sequence must be the same.
5
None of the above