A circuit breaker of a gas intensive trimer mechanical linkage

Abstract

The invention relates to a gas-insulated three-pole mechanical linkage circuit breaker, which is characterized in that it comprises an arc extinguishing chamber with three poles parallel to each other. The device is connected, the driving device is set on the chassis made of metal profiles, and the chassis is installed on the foundation. The circuit breaker of the present invention adopts a self-energy type arc extinguishing structure, and the three-pole arc extinguishing chamber is equipped with a driving device to realize the three-pole mechanical linkage of the circuit breaker. The gas source equipment is canceled, the equipment layout is more compact, the area of ​​the power station is greatly reduced, the capital investment of the power station construction is reduced, the lack of phase operation of the power station equipment is prevented, and the operation of the power station is guaranteed to be more reliable. The invention has the advantages of small occupied area, low construction cost of the power station, simple structure and improved reliability of equipment operation.

Description

technical field [0001] The invention relates to a gas-insulated three-pole mechanical linkage circuit breaker, which is a key component for gas-insulated metal-enclosed switchgear in high-voltage power transmission and transformation systems. Closing, carrying and breaking current under abnormal circuit conditions (such as short-circuit conditions) within a specified time are important switching devices for protection and control, and belong to the technical field of high-voltage switches. Background technique [0002] Generally, circuit breakers for gas-insulated metal-enclosed switchgear have the following disadvantages: [0003] Although the arc extinguishing unit of the circuit breaker adopts the self-energy arc extinguishing principle, it can be equipped with a spring mechanism with a small operating work, but due to the limited operating work of the spring mechanism, it can only realize the three-pole electrical linkage of the circuit breaker. This method must ensure ...

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Problems solved by technology

[0004] The three-pole mechanical linkage of the circuit breaker is completed by a pneumatic device, and the action of this device must be equipped with a compressed air station as a power source and the air source is sent to the pneumatic device by laying a certain length of pipeline. , the laying of pipelines may easily cause compressed air leakage, resulting in the failure of the pneumatic device to reach the pressure value of the action. In addition, the placement of the compressed air station results in a large equipment footprint and high equipment cost

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