An integrated small high-voltage vacuum circuit breaker

Abstract

The invention relates to the technical field of electric appliance equipment and particularly relates to an integrated miniature high voltage vacuum circuit breaker, including a housing, a first fixing terminal, a second fixing terminal, a vacuum arc-extinguishing chamber, an operation mechanism and a flexible coupling, wherein the vacuum arc-extinguishing chamber, the operation mechanism and the flexible coupling are sealed in the housing; the first fixing terminal comprises a conductive core and an insulation sleeve; the conductive core is wrapped in the insulation sleeve; the second fixing terminal and the first fixing terminal are identical in structure; the vacuum arc-extinguishing chamber comprises a static contact and a moving contact; the static contact is connected with one end of the first fixing terminal; one end, not contacted with the static contact, of the first fixing terminal extends out of the housing; one end of the flexible coupling is connected with the moving contact; the other end of the flexible coupling is connected with the second fixing terminal; one end, not contacted with the flexible coupling, of the second fixing terminal, extends out of the housing; and the operation structure is arranged at one side of the vacuum arc-extinguishing chamber. The integrated miniature high voltage vacuum circuit breaker is characterized in that the size is small, the space is saved, high-level integration is achieved, installation and movement are convenient, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, in particular to an integrated small high-voltage vacuum circuit breaker. Background technique [0002] High-voltage vacuum circuit breaker is the most commonly used electrical component in high-voltage power distribution system, including vacuum interrupter, operating mechanism, bracket and other components. It is a circuit breaker that uses "vacuum" to extinguish the arc. in the vacuum interrupter. Since there is no problem of free gas in the vacuum, it is difficult for the arc to occur when the contacts of this circuit breaker are opened. Common high-voltage vacuum circuit breakers have several deficiencies: 1. The contact points of the traditional vacuum interrupter use copper sheets as the connecting terminals to connect with the electrodes of the electric box. Since the copper sheets are excellent conductors and have a large exposed surface area, they cannot Under normal cond...

AI Technical Summary

Problems solved by technology

Common high-voltage vacuum circuit breakers have several deficiencies: 1. The contact points of the traditional vacuum interrupter use copper sheets as the connecting terminals to connect with the electrodes of the electric box. Since the copper sheets are excellent conductors and have a large exposed surface area, they cannot Under normal conditions, if the distance between adjacent copper sheets is too close, arcing may occur, which may pose a safety hazard. Therefore, a safe distance must be kept between the copper sheets during installation, generally greater than 30cm, resulting in a relatively large volume of the high-voltage vacuum circuit breaker, which is not enough to save space. And the installation and movement are not convenient enough; 2. Due to the large volume occupied by the connection between the vacuum interrupter and the electric box electrode, the vacuum interrupter and the operating mechanism need to be installed separately, which is not conducive to the vacuum interrupter, the operating mechanism and other If the components are sealed and installed, the components are exposed to the air and are easily corroded, which affects the service life of the high-voltage vacuum circuit breaker

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