1.Dry transformers with high and low voltage windings are coated by a thin layer of epoxy resin.It has the advantages of flame retardant, self-extinguishing, moisture-proof, heat dissipation and so on. 2.Equipped with a low-noise air-cooled device, the fan can be automatically controlled to start and close through the thermostat, so that the transformer can be operated with a 40% increase in capacity. 3.It can go deep into load centers, such as high-rise buildings, airports, wharfs, power plants, residential communities or complete sets of substations. 4.The temperature sensing element and the sensing system embedded in the low voltage winding can start and turn off the fan or alarm or trip according to the set value for protection.