Middle disposed withdrawn type vacuum circuit breaker

Abstract

The invention discloses a central withdrawable vacuum breaker which comprises a mainframe box assembled on the chassis vehicle of an inserting mechanism; a spring control mechanism which is arranged on the mainframe box, is a miniaturization spring control mechanism adopting modularization and used by a vacuum breaker; a minimized one-time sealed ceramics vacuum arc extinguishing chamber is adopted and is completely insulated with a main conductive loop in a solid-sealed pole rod and is arranged at the back bracket of the mainframe box transversely; the main conductive loop in the solid-sealed pole rod is provided with an electronic current mutual inductor which is connected with a microcomputer comprehensive protection and detection device arranged in the mainframe box by an interface. The design of the parts thereof is integrated, modularized and generalized, thereby simplifying the manufacture technique; moreover, the central withdrawable vacuum breaker is compact in structure, is high in transmission efficiency, is small in integral occupied area as well as is convenient to be mounted and maintained; the chassis vehicle of the inserting mechanism is reliable in motion stroke locating, effectively maintains the inserting depth of a contact terminal, leads a tank body to be not deformed, prolongs the service life, remarkably improves the product quality and service performance, improves the appearance beauty and is beneficial to realizing the intelligentized control of the comprehensive detection and protection.

Description

technical field [0001] The invention relates to an indoor high-voltage AC vacuum circuit breaker, in particular to a small central removable vacuum circuit breaker suitable for a 12Kv-24Kv, 50Hz three-phase AC power grid. Background technique [0002] At present, with the development of the power market and the advancement of high-voltage switch technology, the structure of vacuum circuit breakers has gradually developed from a fixed type to a handcart type. When this kind of vacuum circuit breaker is overhauled, it needs to be disassembled, and the overhaul takes a long time, seriously reducing the continuity and reliability of power supply. In addition, an internal arc fault in one part will often spread to other parts or even adjacent vacuum circuit breakers, resulting in a "burning city" accident. Therefore, in order to achieve miniaturization, the heavy handcart structure was soon replaced by the mid-mounted structure. Domestically produced vacuum circuit breakers are...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a central removable vacuum circuit breaker, which solves the defects of existing vacuum circuit breakers such as complex manufacturing process, many types of parts, poor reliability, large volume, and difficulty in installation and maintenance. The design is integrated, modularized, and generalized, thereby simplifying the manufacturing process. It has the characteristics of compact structure, small space occupied by the whole machine, and easy installation and maintenance. Deep, so that the cabinet does not deform, prolong the service life, significantly improve product quality and performance, increase the appearance of beauty, and help to realize the intelligent control of comprehensive measurement protection

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