Three-station vacuum switch tube

A vacuum switching tube and three-station technology, applied in electric switches, high-voltage/high-current switches, high-voltage air circuit breakers, etc., can solve the problems that users do not believe in the safety and reliability of vacuum isolation fractures, and cannot accept vacuum isolation fractures. To achieve the effect of safe and reliable insulation performance, reasonable wiring method and reasonable design

Active Publication Date: 2011-08-17
西安森源开关技术研究所有限公司
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Problems solved by technology

Recently, the grounding fracture has begun to use vacuum, but because there is no breakthrough in the mechanism and structure, users do not believe in th

Method used

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Embodiment Construction

[0031] Such as figure 1 , figure 2As shown, the present invention is composed of a vacuum chamber with a sealed cavity inside and a static contact assembly, a moving contact assembly and a ground contact 5 installed in the vacuum chamber. The vacuum chamber is composed of an upper end cover 2 from top to bottom , the upper insulating shell 3, the shielding cylinder 14, the lower insulating shell 6 and the lower end cover 8 are sequentially connected to form. The static contact assembly includes a static conductive rod 1 and a static contact 4 installed on the front end of the static conductive rod 1 and the static contact 4 is electrically connected to the static conductive rod 1. The moving contact assembly includes a movable conductive rod 10 and The moving contact 11 installed on the front end of the moving conductive rod 10 and the moving contact 11 is electrically connected with the moving conductive rod 10, the rear part of the static conductive rod 1 is installed on t...

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Abstract

The invention discloses a three-station vacuum switch tube comprising a vacuum chamber, a fixed contact assembly, a moving contact assembly and a grounding contact, wherein the grounding contact comprises a grounding contact ring and a grounding terminal, wherein the grounding terminal is electrically connected with the grounding contact ring, and a moving contact is driven by an operating mechanism to take linear back-and-forth movement between a fixed contact and the grounding contact ring; and when the moving contact, the fixed contact and the grounding contact ring are all in off states, the tolerance electric field intensity between the moving contact and the fixed contact is higher than that between the moving contact or the fixed contact and the grounding contact ring. The invention realizes the switch-on, isolation and grounding three-station functions, also not only has the advantages of compact structure, reasonable design, advanced technology, current relative standard accordance, long electrical life and mechanical life, wide application range, high safety and reliability, and the like, but also realizes that electric breakdown firstly generates between a loading terminal and a grounding terminal once vacuum degree is reduced, enables the leakage currents and the short-circuit currents to flow into earth and ensures the safety of maintenance personnel who possibly mistakenly contact the loading terminal.

Description

technical field [0001] The invention relates to a medium-voltage vacuum switch tube with a working voltage of 3.6kV-40.5kV, in particular to a three-station vacuum switch tube. Background technique [0002] Referring to the provisions of the national standard GB 2900.20 "Electrical Terminology for High-Voltage Switchgear", the fracture refers to two or more conductors of the mechanical switch, which disconnect the conductive circuit under normal conditions and connect the conductive circuit with its contact during operation. distance. In the field of high-voltage switch technology, there are the following three kinds of fractures: isolation fractures, arc-extinguishing fractures and grounding fractures. Among them, the isolation fracture is a fracture for safety isolation from the live circuit: in the divided position, there are insulation properties and disconnection signs that meet safety requirements between the isolation fractures; in the closed position, it can carry n...

Claims

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Application Information

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IPC IPC(8): H01H33/66H01H33/664
Inventor 王岩王志超王德杉杨艳敏达利科
Owner 西安森源开关技术研究所有限公司
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