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Ht Breaker


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Can anybody suggest me about selecting HT breaker for this case?

The project is of a big mall here in Mumbai-India. The entire power is fed from three transformers of 2.5MVA each.

Details of transformers : 2500KVA, 22kV/0.433kV, Dyn11, AN, Cast Resin Dry type.

% impedance at 75deg : 6.25%

Full load losses : 20KW


We are to decide about the HT breaker for feeding these three transformers & it fault level.


Can anybody guide me? If you need any more information, I'll try to furnish asap.





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