Oil-immersed type high-overload power transformer

Abstract

An oil-immersed type high-overload power transformer is provided with an open transformer box body. A sealed cover plate is arranged above the box body. A transformer core is arranged in the box body. The oil-immersed type high-overload power transformer is characterized in that organic high-temperature-resisting paint is sprayed on the inner surface and the outer surface of the box body, a sealing cushion made of fluororubber is embedded between an opening edge on the upper portion of the box body and the sealing cover plate, dimethyl silicone oil is arranged in the box body to be used as transformer oil, a cylindrical box body is fixedly arranged on the sealing cover plate of the transformer, a partitioning plate is arranged in the middle of the cylindrical box body, and the partitioning plate divides the whole cylindrical box body into an oil storage box and an expanding box in a partitioning mode. According to the structure, performance is stable, materials has high temperature resistance and corrosion resistance, continuous working time of an oil-immersed transformer under an overload situation is greatly prolonged, meanwhile, the expanding box is added, the problem that inner temperature of the transformer is too high, pressure is increased, and accordingly explosion happens can be avoided, and normal working operation of the transformer and the personnel safety of a using person are guaranteed.

Description

technical field [0001] The invention relates to the technical field of transformer equipment, in particular to an oil-immersed high overload power transformer. Background technique [0002] Generally speaking, when the transformer is operating under overload, the temperature rise of its various parts will be higher than that during the rated load operation. Since the aging degree of transformer coil insulation is related to temperature, it is known from the introduction of relevant design materials and operating experience that it is generally believed that the cable paper used for oil-immersed transformer coils is in the range of 80-140 degrees Celsius, and the temperature increases by 6 degrees Celsius, and its aging speed increases. Double, the national standard stipulates: when the transformer is running under rated load, the average temperature rise of the coil is 65 degrees Celsius. Usually, the temperature rise of the hottest point of the coil is about 13 degrees Cels...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that when the existing oil-immersed transformer is operating under high overload, the materials used inside the transformer have poor anti-aging ability, resulting in a short sustainable running time of the transformer, and even causing the transformer to explode and cause casualties, etc. problem, to provide an oil-immersed transformer with a long continuous operating time under high overload conditions

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