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Answer Posted / hemant ambekar
Delhi Metro Rail Corporation
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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?
What are the disadvantages of autotransformer?
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i have applied for junior engineer 2 c&w for Guwahati RRB please send me last five year question paper
Can anyone provide with a SLD for HT panel installation for a 33KV line and distribution end has three 1.5MV transformers. Is it suitable to use OCB or VCB and also provide me the suitable rating and its connection diagram.
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why we setting 95 deg and 105 deg in wti and oti of distibution transformer ? give the reson for that ?
