A wall-piercing bushing with a shielding structure

Abstract

The embodiment of the invention discloses a wall bushing provided with a shielding structure. The wall bushing comprises an insulating bushing, an outer shielding layer, an inner shielding layer and a middle shielding layer are further embedded into the bushing wall of the insulating bushing, and the outer shielding layer is close to the outer wall of the insulating bushing and can effectively improve electric field distribution of the outer surface of the wall bushing; the inner shielding layer is close to the inner wall of the insulating bushing and can effectively improve electric field distribution of the inner surface of the wall bushing; the middle shielding layer is arranged between the outer shielding layer and the inner shielding layer, plays the role of an intermediate electrode and can effectively improve electric field distribution in the wall bushing. According to the embodiment of the wall bushing, due to the fact that multiple layers of shielding including the inner layer shielding, the middle layer shielding and the outer layer shielding are adopted, particularly the middle layer shielding plays the role of the intermediate electrode, and electric field distribution in the wall bushing and electric field distribution on the surface of the wall bushing can be evener, so that partial discharge and even a breakthrough fault of the wall bushing can be prevented more effectively.

Description

technical field [0001] The invention relates to the technical field of a wall-piercing bushing, in particular to a wall-piercing bushing with a shielding structure. Background technique [0002] The wall bushing belongs to the power station and electrical high-voltage insulators. Wall bushings are used when high-voltage current-carrying conductors need to pass through technical enclosures or walls, etc., whose potential is different from theirs. The wall bushing mainly plays the role of insulating and fixing the lead wire. The bushings used to lead current-carrying conductors into or out of the metal casings of electrical equipment such as transformers, circuit breakers, and capacitors are bushings for electrical appliances, and those that pass current-carrying conductors through buildings or walls are bushings for power stations. [0003] From the perspective of the typical insulation structure of the wall bushing, it is mainly divided into two categories: the wall bushin...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a wall-piercing bushing with a shielding structure to solve the problem in the prior art that the electric field distribution in the wall-piercing bushing with double-layer shielding is not uniform enough, resulting in partial discharge and further breakdown faults

Images