Vacuum switch tube

Abstract

The invention provides a vacuum switch tube comprising an insulated case, an upper end cover, a lower end cover, a fixed conductive base, a first movable conducting rod and a second movable conducting rod, wherein the upper end cover is hermetically arranged at the upper end of the insulated case; the lower end cover is hermetically arranged at the lower end of the insulated case; the fixed conductive base comprises at least one joint and is fixedly arranged in the insulated case; the joints penetrate through the insulated case; the fixed conductive base is electrically and fixedly connected with a first fixed contact and a second fixed contact respectively; the first movable conducting rod penetrates through the upper end cover and first corrugated pipes connected with the inner sides of the upper end cover and is electrically and fixedly connected with a first movable contact arranged in a first vacuum chamber; and the second movable conducting rod penetrates through the lower end cover and second corrugated pipes connected with the inner sides of the lower end cover and is electrically and fixedly connected with a second movable contact arranged in a second vacuum chamber. The vacuum switch tube provided by the invention can realize three positions, thus improving the versatility.

Description

technical field [0001] The invention relates to a vacuum switch structure technology, in particular to a vacuum switch tube. Background technique [0002] The vacuum switch is an electrical device used to control and protect the power system. It realizes the closing and breaking of the circuit current by controlling the closing and separating of the two electrode contacts (hereinafter referred to as the contacts) in the vacuum switch tube, thereby To achieve the purpose of controlling the power system. The vacuum switch tube is the core component of the vacuum switch. It is a device that controls and extinguishes the arc through the contacts sealed in the vacuum container. [0003] The structure of the current common vacuum switch tube is as follows: figure 1 As shown, the tube body of the vacuum switch tube generally includes an insulating shell 31, metal end caps 32 arranged at the upper and lower ends of the insulating shell 31, a fixed conductive rod 34, a movable cond...

AI Technical Summary

Problems solved by technology

When the vacuum fracture distance increases to a certain extent, the increase in its withstand voltage capability is not obvious, which limits its use in high voltage fields

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