Dry type transformers are mainly composed of iron cores made of silicon steel sheets and coils cast with epoxy resin, which have the advantages of strong short-circuit resistance, low maintenance workload, and high operating efficiency.

Dry type transformers are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery equipment and other places. The cooling methods are divided into natural air cooling (AN) and forced air cooling (AF). During natural air cooling, the transformer can operate continuously for a long time at its rated capacity. When forced air cooling is used, the output capacity of the transformer can be increased by 50%.