railway UPMRC SCTO 2024 Mock Test Electrical Machines Transformer Parallel Operation of Three Phase Transformers
Which of the following combination of 3-phase transformers can be successfully operated in parallel:
1
Δ-Y and Δ-Y
2
Y-Y and Δ-Y
3
Δ-Δ and Δ-Y
4
Y-Δ and Δ-Δ