What Is A Dry Type Transformer

In recent years, dry-type transformers have developed rapidly in China. In major cities such as Beijing, Shanghai, and Shenzhen, dry-type transformers have accounted for 50%, while in other large and medium-sized cities, they have also accounted for 20%. There are four types of dry transformation structures: epoxy resin casting, filler casting, wrapping, and impregnation. At present, open-air ventilated H-class dry-type transformers are widely used in Europe and America. They are a new type of H-class dry-type transformer that draws on the characteristics of the wrapped structure and adopts Nomex paper. Due to their high price, they have not yet been promoted in China. At present, the dry type distribution transformers with the largest short-circuit test capacity in China are 2500KV · A and 10/0.4KV; The dry type power transformer with the largest capacity through short-circuit test is 16000KV · A and 35/10KV.