Fixed side-installed vacuum circuit breaker

Abstract

The invention relates to a fixed side-entry type vacuum circuit breaker which comprises a mainframe box provided with a wire connecting terminal, an oil hydraulic buffer, and the like, a spring operating mechanism assembled on the mainframe box and vacuum arc-extinguishing chambers connected through an output four-linkage rod, wherein the modularized vacuum circuit breaker is adopted and is assembled in a front-end box body of the mainframe box through the minimized spring operating mechanism; the minimized vacuum arc-extinguishing chambers which are sealed and arranged for one time are adopted and are completely insulated in a fixedly-sealed terminal post together with a master electric loop and are longitudinally arranged on a rear-side bracket of the mainframe box; and an electronic current transformer is arranged in the master conducting loop in the fixedly-sealed terminal post and is connected with a microcomputer integrated protection measuring device assembled in the mainframe box through an interface. The components are designed through integration, modularization and generalization ways, thereby the manufacturing technologies are simplified, the structure is compact, the driving efficiency is high, the occupying space of the complete machine is reduced, the installation and the maintenance are convenient, the quality and the using performance of the product are obviously improved, and the intelligentized control of the integrated measuring protection can be achieved.

Description

technical field [0001] The invention relates to an indoor high-voltage AC vacuum circuit breaker, in particular to a small fixed side-mounted vacuum circuit breaker suitable for 12Kv-24Kv, 50Hz three-phase AC power grid. The vacuum circuit breaker provides a new generation of high-reliability vacuum circuit breakers, and its manufacture follows the standards and specifications consistent with relevant publications such as GB, DL and IEC. Background technique [0002] At present, due to the influence of its structure, the domestically produced circuit breakers have larger dimensions, more air and composite insulation, and poor stability of the transmission mechanism. Large, can be as high as 30% of the rated opening distance, the technical index of the circuit breaker is low, especially there are problems such as imperfect mechanical interlocking. Although the circuit breakers produced abroad have high technical indicators, their manufacturing process is complex, there are m...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a fixed side-mounted vacuum circuit breaker, which solves the defects of existing vacuum circuit breakers such as complex manufacturing process, many types of components, poor reliability, difficult installation and maintenance, etc., and its component design is integrated , Modularization, and generalization, thereby simplifying the manufacturing process, having a compact structure, reducing the space occupied by the whole machine, and being easy to install and maintain, ensuring safe and reliable operation, prolonging the service life, significantly improving product quality and performance, and increasing The appearance is beautiful, which is conducive to the realization of intelligent control of comprehensive measurement protection

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