Shell of oil-immersed transformer

Abstract

The present invention discloses a shell of an oil-immersed transformer. The shell of the oil-immersed transformer comprises an oil tank, heat dissipation pipes are arranged on the two sides of the oiltank, heat dissipation pipe protection shells are installed on the surfaces of the upper ends of the heat dissipation pipes, and the heat dissipation pipe protection shells are made of polytetrafluoroethylene. The heat dissipation pipes are main heated pipe fittings in the thermal cycle of the oil tank, especially, the upper ends of the heat dissipation pipes are the most concentrated heated parts, when dirt such as overflowing oil dirt and dust is attached, the dirt such as overflowing oil dirt and dust is greatly influenced along with the influence of the high temperature on the dirt such as overflowing oil dirt and dust, an insulating layer, a heat dissipation material and the like on the surface of heat dissipation pipes can be greatly influenced, accidents such as oil leakage can becaused most seriously, and finally, the iron core winding and the like are contacted with air to be oxidized to influence transformation efficiency or cause safety accidents. Therefore, it is particularly important to install the heat dissipation pipe protection shell at the upper ends of the heat dissipation pipes, polytetrafluoroethylene is selected as the material of the heat dissipation pipe protection shell, and the shell of the oil-immersed transformer is resistant to high temperature, smooth in surface, not prone to dust accumulation, resistant to corrosion and high in insulativity.

Description

technical field [0001] The invention relates to an oil-immersed transformer, in particular to a shell of an oil-immersed transformer. Background technique [0002] The distribution transformer is one of the important equipment in the power supply and distribution system of industrial and mining enterprises and civil buildings. It reduces the 10(6)kV or 35kV network voltage to the 230 / 400V bus voltage used by users. This type of product is suitable for AC 50 (60) Hz, three-phase maximum rated capacity of 2500kVA (single-phase maximum rated capacity of 833kVA, generally not recommended to use single-phase transformers), and can be used indoors (outdoors) when the capacity is 315kVA and below Can be installed on a pole, the ambient temperature is not higher than 40°C, not lower than -25°C, the highest daily average temperature is 30°C, the highest annual average temperature is 20°C, the relative humidity is not more than 90% (ambient temperature is 25°C), the altitude No more ...

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Problems solved by technology

[0004] The oil pipe of the oil-immersed transformer is the heat dissipation pipe (2) which is easily corroded in a long-term dirty environment, and the upper end is easily heated, resulting in the peeling off and failure of the heat dissipation coating, etc.

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