Solution
Dry transformers are widely used in local lighting, high-rise buildings, airports, terminals, CNC machinery and equipment and other places, simply said dry transformers refers to the iron core and winding is not impregnated in insulation oil transformer.
Dry-type transformers and oil-immersed transformers are the two most used transformers, compared with oil-immersed transformers, dry-type transformers have better fire performance, and are mostly used in places with higher fire protection requirements, such as hospitals, airports, stations and other places, but relatively the price is higher, and there are certain requirements for the environment, such as not too wet, not too much dust and pollution.