Arc extinguishing chamber assembly and porcelain column type sulfur hexafluoride circuit breaker

Abstract

An interrupter assembly and porcelain column type sulfur hexafluoride breaker, the interrupter assembly comprising: more than two interrupter monomers (1, 2); each interrupter monomer comprises a moving support arranged at the head end and a static support arranged at the rear end, moving contacts (13, 23) being assembled on the moving support in a guiding and sliding mode, and static contacts (61, 62) coaxially opposite to the moving contacts being fixedly provided on the static support; the interrupter monomers are in end-to-end serial connection on the same axis, and the moving contacts of one interrupter monomer of each two adjacent interrupter monomers is in transmission connection to insulation connecting pieces (7, 71, 72) in transmission connection to the moving contacts of the other interrupter monomer, and the static support at the rear end of the former interrupter monomer of each two adjacent interrupter monomers is electrically connected to the moving support of the other interrupter monomer connected at the rear end of the interrupter monomer. Synchronous opening and closing can be carried out when the interrupter assembly is used, thus significantly improving the voltage grade borne by the interrupter of the breaker.

Description

technical field [0001] The invention relates to an arc extinguishing chamber component and a porcelain column type sulfur hexafluoride circuit breaker. Background technique [0002] With the continuous development of UHV power transmission and transformation line projects, UHV power grid construction needs to be able to close, carry and break current under normal circuit conditions and to close, carry and break abnormal circuit conditions within a specified time ( UHV circuit breaker equipment for currents such as short-circuit conditions). In the UHV converter station project, in order to adapt to and meet the special requirements of the UHV filter protection switchgear (fracture recovery voltage 2800kV; the filter is UHV DC field equipment, the space charge accumulation effect of the DC electromagnetic field is obvious, so the circuit breaker The creepage distance is higher than that of the AC circuit breaker, the electrical clearance of the insulating pillar is not less ...

AI Technical Summary

Problems solved by technology

This circuit breaker can meet the performance requirements of the circuit breaker for the UHV power grid. However, in the application for switching filters, the height of the support of the circuit breaker cannot meet the requirements for the electrical clearance of the circuit breaker for the UHV filter, and the cable tie The structure occupies a large area, and it is difficult to adapt to the tight condition of the filter field. In addition, the circuit breaker uses two operating mechanisms, and correspondingly uses two sets of insulating pull rods and two sets of five-box transmission structures. Complicated, unreliable, and powerful

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