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Transformer Riddle No.74 - Vector group connectin of Power transformer
Dear Sir,

Please help me in the following issue.

We have received a enquiry with 63/63/0.25MVA, 80/23/??/0.42kV PT. In this we have to decide the ?? winding and the vector group connection is Ynyn0+d+syno. Whta is syn0 stands for and the customer is asking for +/-5% variation on 0.42 kV side.

We thought of designing one 80/23/11 kV with 63MVA and 11/0.42 kV with 0.25MVA. PLease tell me whether our approach is correct or not?

And also help us in resolving the problem.

Author : Sreelatha - From: India
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