Oil-immersed distribution transformer

Abstract

The invention provides an oil-immersed distribution transformer, which comprises a box body, a finned radiator, a fan motor and at least four conical grooves, wherein the finned radiator is arranged on the side surface of the box body; the fan motor is arranged at the bottom part of the finned radiator; the top part of the box body is provided with a high-voltage sleeve and a low-voltage sleeve; an oil storage tank is arranged at the upper part of the box body, and is communicated with the box body through a pipe; a gas relay is arranged at the middle part of the pipe; an iron core and a coil are arranged in the box body; the coil is arranged on the iron core; a base is arranged at the lower part of the box body; at least four fixing legs are arranged at the bottom part of the base and are conical; rubber which is 1.2-1.7cm thick wraps the outer surfaces of the fixing legs; the at least four conical grooves correspond to the fixing legs; rubber which is 1.2-1.7cm thick is arranged on the inner surfaces of the conical grooves; the box body wall of the box body is in a dual-layer structure formed by combining an inner box body plate and an outer box body plate; and mixed powder is filled in the middle of the inner box body plate and the outer box body plate.

Description

technical field [0001] The invention belongs to the technical field of electric equipment, in particular to an oil-immersed distribution transformer. Background technique [0002] Oil-immersed transformer is mainly composed of iron core, winding, oil tank, oil conservator, insulating bushing, tap changer and gas relay. The iron core is the magnetic circuit part of the transformer. During operation, hysteresis loss and eddy current loss will be generated to generate heat. In order to reduce heat loss and reduce volume and weight, the iron core is made of cold-rolled grain-oriented silicon steel sheet with a high magnetic permeability of less than 0.35mm. Windings and cores are the core components of a transformer. Due to the resistance of the winding itself or the contact resistance at the joint, heat will be generated by I2Rt. Therefore, the winding cannot pass a current higher than the rated current for a long time. In addition, the body (winding and iron core) of the ...

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Problems solved by technology

Chinese patent with application number 201220447315, Chinese patent with application number 201320356540, etc., although disclosed ways to reduce transformer noise, are not suitable for oil-immersed transformers or have low noise reduction effects

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