Vacuum direct-current fast circuit breaker

Abstract

The invention discloses a vacuum direct-current fast circuit breaker which comprises a spring action mechanism box, an insulation pull rod, a permanent magnet, an electromagnet, a lower outgoing lineterminal, a vacuum arc-extinguishing chamber and an upper outgoing line terminal, the end, away from a transmission device, of a dual-arm pull rod is movably connected with the insulation pull rod, abreaking spring is fixedly connected to the end, close to the transmission device, of the dual-arm pull rod, the insulation pull rod penetrates through a fixing piece and a lower pressing plate to befixedly connected with a movable conductive rod, a plurality of contact springs are symmetrically arranged on the upper side of the upper pressing plate, the upper end of the movable conductive rod penetrates into the vacuum arc-extinguishing chamber and is fixedly connected with a moving contact, transverse rods are symmetrically arranged at the two sides of the upper end of the movable conductive rod, the tail ends of the transverse rods are each fixedly provided with a sliding block, the sliding blocks are slidably installed on guiding sliding rails, the guiding sliding rails are fixedly arranged on the two sides on the inner wall of the vacuum arc-extinguishing chamber, and a fixed contact is arranged above the middle of the moving contact; according to the vacuum direct-current fast circuit breaker, by arranging the transverse rods, the sliding blocks and the guiding sliding rails, the guiding effect on movement of the movable conductive rod is achieved, and the phenomenon of clamping of the movable conductive rod is reduced.

Description

technical field [0001] The invention relates to a vacuum circuit breaker, in particular to a vacuum direct current fast circuit breaker, and relates to the technical field of vacuum circuit breakers. Background technique [0002] Vacuum circuit breaker is an important control device in the power system. In the operating grid, it is used to control the input and exit of power lines or equipment, and to protect the normal operation of the line. Most of the existing vacuum DC circuit breakers are driven by a single magnetic drive or a single spring mechanism. The moving conductive rod of the device has no guiding mechanism, so it cannot play a guiding role in the movement of the moving contact, so that the moving track of the moving contact is easily not on the axis of the vacuum interrupter, resulting in jamming of the moving conductive rod. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the defect that most of ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defect that most of the existing vacuum DC circuit breakers are driven by a single magnetic drive or a single spring mechanism, and there is no guiding mechanism, which cannot guide the movement of the moving contact, and provide a vacuum DC fast circuit breaker, thus solving the above problems

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