Shielding contact box of high-voltage switch cabinet

Abstract

The invention relates to a shielding contact box of a high-voltage switch cabinet, comprising a box body and a support plate, wherein the box body is formed in one step from mixed epoxy materials and in a cylinder shape, one end of the box body is provided with an opening, and the other end of the box body is closed; the outer wall of the box body and the support plate are both provided with umbrella skirts; and the inner cavity wall of the box body is provided with a nonmagnetic metal shielding layer, a static contact installing insert and a bus fixing insert which form an integral piece. The shielding contact box uses the nonmagnetic metal shielding layer to replace a net ring and especially embeds the nonmagnetic metal shielding layer into the bottom wall of the inner cavity of the box body so that the nonmagnetic metal shielding layer directly forms the integral piece with the static contact installing insert and the bus fixing insert, thereby not only uniformizing an electric field, reducing the partial insulator discharge, but also facilitating the elimination of corona by changing electric charge distribution direction and expanding phase spacing, so that the insulator can move in a better environment, thereby ensuring the safe operation of electric power.

Description

【Technical field】 [0001] The invention belongs to a shielded contact box for a high-voltage switchgear, in particular to a contact box with a shielding mesh ring on the inner wall. 【Background technique】 [0002] The contact box is set in the high-voltage switch cabinet and is a transitional component connecting the circuit breaker and the static contact. Its structure includes a box body and a support plate, the box body is cylindrical, one end is open and the other end is closed. The outer wall of the cylindrical box is provided with an umbrella skirt, and the bottom of the closed inner cavity is provided with a static contact installation insert. For the installation of the static contact, a radial outlet is opened on the box body wall, through which the branch busbar form the main circuit. The support plate and the box body are integral cylindrical insulators formed by epoxy mixture at one time, and the outer surface of the support plate is also provided with a corresp...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned problems existing in the prior art, the present invention aims to provide a shielded contact box for high-voltage switchgear with a new structure. The contact box is not easy to produce corona phenomenon during the operation of the switchgear, thereby facilitating Ensure the insulation performance of the contact box, avoid breakdown and eliminate potential safety hazards in power operation

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