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why we commonly use delta star winding in power and
distribution transformers
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Answer Posted / pankaj malhotra
The best way to minimise 3rd harmonics in the transformers
there are two ways. Either transformermer has low flux
density which is not economical and not in use or to make
atleast one winding of the transformer in delta because 3rd
harmonics are absent in delta. Since the requirement of
three phase four wire system in distribution, we commonly
use delta star winding
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