Interrupter assembly and porcelain knob-type sulphur hexafluoride circuit breaker

Abstract

The invention provides an interrupter assembly and a porcelain knob-type sulphur hexafluoride circuit breaker. The interrupter assembly comprises more than two interrupter monomers; each interrupter monomer comprises a moving support arranged at the head end and a static support arranged at the tail end; a moving contact is assembled in a guiding and sliding mode on the moving support; the static support is fixedly provided with a static contact coaxially opposite to the moving contact; the interrupter monomers are in end-to-end serial connection on the same axis; the moving contact of one interrupter monomer of each adjacent two interrupter monomers is in transmission connection with an insulated connection piece in transmission connection with the moving contact of the other interrupter monomer; and the static support at the tail end of the former interrupter monomer of each adjacent two interrupter monomers is in conductive connection with the moving support of the other interrupter monomer connected onto the tail end of the interrupter monomer. Synchronous opening and closing can be carried out when the interrupter assembly is used, and the voltage grade borne by the interrupter of the circuit breaker can be greatly improved.

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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