A circuit breaker with arc extinguishing chamber series structure

Abstract

The invention discloses a circuit breaker of arc extinguish chambers in series connection. The circuit breaker comprises circuit breaker casings and driving mechanisms, wherein two arc extinguish chambers are symmetrically arranged left and right in each circuit breaker casing, a fixed contact and a movable contact are arranged in each arc extinguish chamber, the fixed contacts of the two arc extinguish chambers are electrically connected mutually, and the movable contacts are led out from the arc extinguish chambers and are connected with one ends of connecting-rod mechanisms; the driving mechanisms are respectively connected with the other ends of the connecting-rod mechanisms at the same positions through an insulating tension rod, and the driving mechanism drives the insulating tension rod to move up and down so as to drive the connecting-rod mechanisms to synchronously move, and each movable contact is further driven to take gathering and separating movement along with the corresponding movable contact , wherein the led-out terminals of the two movable contacts are used as the circuit access terminals of the circuit breaker. The circuit breaker disclosed by the invention solves the problem that the multiple circuit breaker does not synchronously switch on and switch off breaks, the time for the circuit breaker to switch on and switch off the breaks is shortened, the capability of switching on and switching off the breaks of the circuit breaker is substantially improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to a high-voltage and ultra-high-voltage vacuum circuit breaker, in particular to a circuit breaker with a series structure of arc extinguishing chambers. Background technique [0002] With the continuous and rapid development of my country's economy, the demand for electricity in the whole society is also increasing, and the capacity of the power grid continues to expand, forcing the voltage level to continue to increase. At present, most high-voltage transmission lines in China directly use 126kV voltage level, and high-voltage circuit breakers get a lot of use. Due to the excellent arc extinguishing performance, SF 6 Circuit breakers firmly occupy the application market of this voltage level, but SF 6 As a typical greenhouse gas, it will be completely banned in the near future, so it is urgent to find an effective substitute, and replace SF with vacuum circuit breakers 6 Circuit breakers have become a new direction of develop...

AI Technical Summary

Problems solved by technology

[0004] In view of the above technical problems, the present invention discloses a circuit breaker with a series structure of arc extinguishing chambers, which adopts a series structure of double arc extinguishing chambers and a specially designed transmission operating mechanism, which solves the problem of asynchronous closing and opening of multiple fractures, shortens the The closing and opening time of the circuit breaker is shortened, the breaking capacity of the circuit breaker is greatly improved, and the production cost is saved

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