Surface-contact outdoor AC high-voltage disconnecting switch

Abstract

The invention discloses a surface-contact outdoor AC high-voltage disconnecting switch. The disconnecting switch comprises an insulator, moving and static contact seats fixed on the insulator, static contacts fixed on the static contact seat, a moving contact fixing on a moving contact seat and a guiding sleeve; the static contacts are fixed in the inner side of the guiding sleeve; the static contacts include a main static contact and an auxiliary static contact in sliding cooperation; the main static contact is fixed on the static contact seat; the static contact seat is connected with a binding post; and the moving contact is in axial connection with the other end of the guiding shaft, and the moving contact makes surface contact with the static contacts. The disconnecting switch has the advantages that a surface contact manner increases the contact area and reduces the resistance of a contact surface, it is ensured that currents flow smoothly, and phenomena as spark discharge are prevented; and the moving contact makes direct contact with the static contacts, and defects of too many contact points and unreliable contact when the moving contact is connected with the static contacts via other conductors are overcome.

Description

technical field [0001] The invention relates to power equipment, in particular to a high-voltage isolating switch. Background technique [0002] The typical structure of the existing outdoor high-voltage isolating switch is that the terminals are connected through movable conductors, such as Chinese patent application number 201020678544.0, which has a structure of "an outdoor AC high-voltage isolating switch, including an upper outlet board and a lower outlet board, and an upper outlet board. and the lower outlet plate are respectively fixed on two insulators, and a movable contact knife is connected to the lower outlet plate through a connecting shaft, and the movable contact knife is connected to the upper outlet plate by rotating around the connection shaft; the upper outlet plate is provided with an upper knife seat, The upper knife seat and the upper outlet plate are arranged to be bent upwards, the lower outlet plate is provided with a lower knife seat, and the lower ...

AI Technical Summary

Problems solved by technology

", this structure has the following disadvantages: 1. The contact between the moving contact and the static contact is a surface-line contact. Due to the small contact area, it is easy to generate a large resistance, especially after long-term operation, due to the influence of spark discharge, in the Oxide film and carbonized film are produced on the contact surface, resulting in an increase in local resistance, which is more likely to cause spark discharge when switching on, thus forming a vicious circle; 2. Since the moving contact adopts a double straight surface structure, springs are arranged on both sides of the double straight In order to ensure the close contact between the moving contact and the static contact, there are multiple sets of springs; after long-term operation, due to the inevitable deformation of the double straight moving contact, the pressure of each set of springs is uneven, so the moving contact cannot be guaranteed. Reliable contact between the head and the static contact

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