What is oil immersed distribution transformer?

Oil-immersed transformer is a structural type of transformer, that is, the coil of the transformer is immersed in oil. Oil-immersed transformers are generally installed indoors or outdoors in separate transformers due to the need for fire protection. They have the characteristics of large size, low cost, simple maintenance, good heat dissipation, strong overload capacity, and wide adaptation to the environment. 　　

When oil-immersed transformers are in operation, the heat of the windings and iron cores is first transferred to the oil, and then to the cooling medium through the oil. The oil-immersed transformer equipment uses oil as the main insulation means of the transformer and is used between the two power grids. The two regional power grids are connected, and oil-immersed transformers are widely used in power plants, steel mills, railways and other large-scale machinery manufacturing industries. Oil-immersed transformer equipment relies on oil as a cooling medium. It is suitable for the power system of petrochemical, electric power, textile, metallurgy, machinery, building materials, coal, mining, urban construction, civil aviation, ports and other industries and enterprises. The rated frequency is 50HZ, the rated capacity is 30～1600KVA, and the high voltage side rated voltage is 10KV. The low-voltage side rated voltage 0.4KV is used for power distribution.