A high-voltage bushing and cable terminal with uniform electric field function

Abstract

The invention discloses a high-voltage bushing with a uniform electric field function, which has a tube hole extending from bottom to top. The outer edge of the longitudinal section of the high-voltage bushing includes a first curve, a second curve and a third curve formed by smooth connection in sequence. or a straight line. The high-voltage bushing is a bushing formed by the inner wall of the tube hole and the outer edge of the high-voltage bushing, which is surrounded by the tube hole as the central axis. The material is a solid insulating medium. conductive layer. The first curve and the conductive or semiconductive layer play the role of a uniform internal electric field of the solid insulating medium, the third curve or straight line can effectively reduce the voltage gradient on the surface of the solid insulating medium, and the convex structure of the second curve can minimize the first The electric field of the conductive or semi-conductive layer at the end of a curve, the high-voltage bushing of the present invention can be produced by integral injection molding, and the conductive or semi-electric layer on the outer surface can be carried out by coating or spraying, the process is simple, and impurities are not easy Into the high-voltage bushing, high quality.

Description

technical field [0001] The invention belongs to the technical field of electric power, and relates to a bushing and a cable terminal for an electric power outdoor terminal. Background technique [0002] At present, in high-voltage bushings using solid insulating media and power products with similar structures, shielding nets made of conductive or semi-conductive materials are usually used to shield and uniform the internal and surface electric fields of the products. In order to form a good electric field distribution inside and on the surface of the solid insulating medium, a shielding net is molded inside the solid insulating medium to improve the reliability of the product under high voltage conditions. [0003] However, the mesh of the shielding mesh needs to be formed by stamping. During the stamping process, burrs are likely to be generated on the edge of the mesh, and the existence of burrs will cause partial discharge and cause safety hazards. It is easy to remain ...

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Problems solved by technology

[0003] However, the mesh of the shielding net needs to be formed by stamping. During the stamping process, burrs are likely to be generated on the edge of the mesh, and the existence of burrs will cause partial discharge and cause safety hazards. It is easy to remain on the surface of the shielding net, and it is easy to mold into the solid insulating medium together with the shielding net. From this point of view, the method of using the shielding net is not only complicated in process, but also easy to penetrate debris

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