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Answer Posted / sanjana singh
when dc is fed to the t/f then the current flow in primary winding but it is not in alternating nature so there is no mutual inductance take place. if d.c continuously fed to t/f after a limit the t/f may burn out.
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I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?
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