Dry-type transformers and oil-immersed transformers are the two most commonly used transformers. Compared with oil-immersed transformers, dry-type transformers have better fire protection performance, and are mostly used in places with higher fire protection requirements, such as hospitals, airports, stations, etc. Places, but relatively speaking, the price is higher, and there are certain requirements for the environment, such as not being too humid, not having too much dust and dirt, etc.

Because dry-type transformers have the advantages of strong short-circuit resistance, small maintenance workload, high operating efficiency, small size, and low noise, they are often used in places with high performance requirements such as fire prevention and explosion protection. Widely used in local lighting, high-rise buildings, airports, wharf CNC machinery equipment and other places.

Simply put, a dry-type transformer refers to a transformer whose core and windings are not immersed in insulating oil. The cooling method is divided into natural air cooling (AN) and forced air cooling (AF). In natural air cooling, the transformer can operate continuously for a long time under the rated capacity. When forced air cooling, the output capacity of the transformer can be increased by 50%. It is suitable for intermittent overload operation or emergency accident overload operation; due to the large increase in load loss and impedance voltage during overload, it is in a non-economic operation state, so it should not be kept in continuous overload operation for a long time.

Its structure is mainly composed of an iron core composed of silicon steel sheets and a coil cast by epoxy resin. An insulating tube is placed between the high and low voltage coils to increase electrical insulation, and the coil is supported and constrained by spacers. The fasteners for the overlapping parts are all Has anti-loose performance.