Self-driven vacuum double-arc-extinguishing-chamber rapid switching-on and switching-off circuit

Abstract

The invention discloses a self-driven vacuum double-arc-extinguishing-chamber rapid switching-on and switching-off circuit and belongs to the technical field of the vacuum circuit breaker. The circuit comprises a vacuum double-arc-extinguishing-chamber rapid circuit breaker comprising a high-speed eddy current switch K1 connected in series with the circuit, a driving coil X, and a high-speed eddy current switch K0 connected in parallel with the circuit. The eddy current switch K1 is a self-closing switch, a moving contact is connected with a moving contact of the high-speed eddy current switch K0 through a metal rod, and the driving coil X is used for pulling the metal rod to move through magnetic force. Short-circuit current flows through the driving coil X to drive the high-speed eddy current switch to be switched on and off, pure mechanical motion switching-on and switching-off are achieved, the stroke is simple, the switching-on and switching-off speed is high, safety and reliability are achieved, switching-on and switching-off can be completed within milliseconds, and the bus protection reactor is put into a main loop to limit the short-circuit current in combination with the manual zero-crossing technology. Electronic elements of the whole on-off circuit are protected from being damaged, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of vacuum circuit breakers, in particular to a self-driven vacuum double interrupter rapid breaking circuit. Background technique [0002] In the existing technology, most quick disconnecting devices rely on CT to monitor the state of the line, and after the controller analyzes and calculates, it gives corresponding action instructions to the circuit breaker. First of all, due to the participation of the controller and other secondary parts in the whole process, the reliability of the opening and closing action of the device is greatly reduced, and the opening and closing time of the device will be increased, potentially threatening the safety of electrical equipment. Secondly, a large number of secondary equipment will occupy a lot of space in the cabinet, resulting in the overall size of the entire device having to be increased, affecting the installation space requirements of the equipment, and also virtu...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the above-mentioned quick breaking device needs secondary equipment such as a controller to drive, the reliability is not strong, there are safety hazards, and a large number of secondary equipment occupies the space in the electrical cabinet, which increases the production cost. Provide a self-driven vacuum double interrupter quick breaking circuit, which has the advantages of pure mechanical drive, safety and reliability, does not occupy the space in the electrical cabinet, and saves costs

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