High pressure vacuum circuit breaker

Abstract

The invention discloses a high pressure vacuum circuit breaker, which comprises three vacuum circuit breaker main bodies and a corresponding operating mechanism; each vacuum circuit breaker main body comprises a vacuum explosion chamber, a moving contact, a static contact, and a insulation pull rod connected with the moving contact; the bottom of the insulation pull rod is connected with the operating mechanism; the insulation pull rod is driven by the operating mechanism to linearly move along vertical direction; the insulation pull rod comprises a insulation column, a supporting device arranged on the upper end of the insulation column and connected with the moving contact, and a pull rod arranged at the lower end of the insulation column and connected with the operating mechanism; the supporting device comprises a supporting rod fixedly connected with the moving contact and a buffer fixed on the top of the insulation column; and the lower end of the supporting rod is fixedly connected with a buffer shaft of the buffer. The invention has excellent buffer effect and can effectively prevent the vacuum explosion chamber, the moving contact and the static contact from damaging because of collision.

Description

technical field [0001] The invention belongs to the technical field of circuit breakers, and in particular relates to a high-voltage vacuum circuit breaker. Background technique [0002] With the continuous development of the national economy, the grid structure and load characteristics are becoming more and more complicated. Many sensitive electrical loads connected to the power system are extremely vulnerable to short-term disturbances from the power system, such as voltage dips and voltage surges. Power quality and operational reliability place increasingly stringent requirements. Therefore, in order to protect sensitive important industrial loads and improve the power quality of the power system, it is necessary for the protective device high-voltage circuit breaker to have very high-speed closing and opening characteristics, that is, a very short closing and opening time. [0003] A traditional high-voltage vacuum circuit breaker includes three vacuum circuit breaker m...

AI Technical Summary

Problems solved by technology

If the insulating pull rod moves too violently, there will be a violent collision between the dynamic and static contacts, which will cause damage to the dynamic and static contacts, and seriously cause the rupture of the vacuum interrupter.

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