Contact box for switch cabinet

Abstract

A contact box for a switch cabinet comprises a cylindrical insulator having one end opened and the other end closed, wherein the lower portion of the cylindrical insulator is a base joint interface, athrough slot connected to an inner cavity for receiving a bus-bar is radially provided on the upper ring wall, and the top of the inner cavity is provided with a static contact mounting insert, wherein a silicone rubber ring is arranged on the base joint interface, and the inner wall of the inner cavity of the cylindrical insulator below the through slot is provided with a non-magnetic metal cylinder shielding layer that is connected to the static contact mounting insert via a wire. The product eliminates the phenomenon in the prior art that it is easy to cause discharge and generate continuous corona due to the existence of an air gap between the static contact and the inner wall of the contact box, increases the radius of curvature, enables electric fields to be distributed along the shielding layer, and is conducive to make the electric fields uniform. In addition, the addition of the silicone rubber ring is also advantageous to eliminate the air gap between the contact box and itscoupling seat, thereby eliminating the gap discharge phenomenon.

Description

【Technical field】 [0001] The invention belongs to an accessory used with electric equipment, in particular to a contact box matched with an AMS-24 switch cabinet. 【Background technique】 [0002] The existing contact box used in conjunction with AMS-24 switchgear, its structure includes a cylindrical insulator formed by epoxy compound with one end open and the other end closed, and a static contact installation insert is provided on the top of the inner wall of the insulator. The inner and outer walls are provided with skirts. There is a through groove on the ring wall of the upper part of the insulator, and the through groove is used to receive the busbar, so that the busbar radially extends into the inner cavity of the insulator through the through groove, and is connected with the static contact through the installation insert. The contact box with this structure has the following problems in practical application: the electric field is not uniform, and there is an air ga...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned problems existing in the prior art, the present invention aims to provide a contact box with a new structure for the switchgear. The contact box is not easy to produce corona phenomenon during the operation of the switchgear, which is beneficial to ensure that the contacts Insulation performance of the box, avoid breakdown phenomenon and prevent the occurrence of electrical accidents

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