Driving mode control-based single-phase vacuum circuit breaker of double arc-extinguishing chamber

Abstract

The invention discloses a driving mode control-based single-phase vacuum circuit breaker of a double arc-extinguishing chamber. The single-phase vacuum circuit breaker comprises a mounting panel, wherein a control box is arranged below the mounting panel; a vacuum arc-extinguishing chamber embedded pole is arranged in a vertical direction; two arc-extinguishing chambers are formed in the vacuum arc-extinguishing chamber embedded pole; the vacuum arc-extinguishing chamber embedded pole is connected with a mounting disc and fixed on the mounting panel; both arc-extinguishing chambers are connected with leading-out wires; moving contacts of both arc-extinguishing chambers are connected with an electrical connecting piece; all the moving contacts below nuts of both arc-extinguishing chambers are sleeved with a disc spring, a three-way part and a nut part; the three-way part is connected with an insulation pulling rod; the insulation pulling rod is connected with a permanent magnetism operating mechanism; and the permanent magnetism operating mechanism is connected with the control box. In the driving mode control-based single-phase vacuum circuit breaker of the double arc-extinguishing chamber, the arc-extinguishing chambers and the insulation pulling rod are sealed and insulated by the vacuum arc-extinguishing chamber embedded pole, the electrical connecting piece connects the moving contacts of the arc-extinguishing chambers to form a series-connected double-break form, and the disc spring is pressed in a piston type driving mode, so the mechanical life of the circuit breaker is greatly prolonged.

Description

Technical field: [0001] The invention relates to a circuit breaker in the electrical field, in particular to a single-phase vacuum circuit breaker with double arc extinguishing chambers in a control transmission mode. Background technique [0002] How to improve the service life of the vacuum circuit breaker, make it less maintenance, maintenance-free, or even no maintenance in the long-term operation, and maintain a safe and reliable operating state is an important issue in the design of high-voltage electrical appliances. AC single-phase high-voltage vacuum circuit breakers are widely used in the field of electric power, as well as in the field of electric locomotive vacuum main circuit breaker railway and electrified railway traction power supply. Most of the high-voltage vacuum circuit breakers currently used are single vacuum interrupters, and there are also double-break horizontal vacuum circuit breakers. The former requires a large opening distance and high speed, whi...

AI Technical Summary

Problems solved by technology

The disadvantage of this circuit breaker is that the transmission part is cumbersome and complicated, there are many parts, and the phenomenon of jamming often occurs, the maintenance of the pneumatic circuit is cumbersome, and the repair process is short

[0004] In recent years, some companies are also developing vacuum circuit breakers with double arc extinguishing chambers connected in series and permanent magnet mechanism to drive the crank arm structure. The structural parts are easy to wear, and the design life is 30,000 times, which requires regular maintenance and replacement.

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