Three-station vacuum arc extinguish chamber for all-solid switch cabinet

Abstract

The invention discloses a three-station vacuum arc extinguish chamber for an all-solid switch cabinet, which is mainly applied to a medium-voltage power switchgear. The three-station vacuum arc extinguish chamber for the all-solid switch cabinet comprises an insulating shell, fixed and moveable cover plates, fixed and movable end conducting rods, fixed and moveable contacts, a corrugated tube and a protection cover, wherein the fixed and movable cover plates are arranged at the upper and lower ends of the insulating shell respectively; the fixed cover plate is welded on the upside of the fixed end conducting rod, while the fixed contact is welded on the downside; the moveable contact is welded by a movable isolating contact and a movable grounding contact; the middle part of the insulating shell is provided with a ground ring; the upper and lower surfaces of the ground rings are connected with the insulating shell by sealing rings; a fixed ground contact is welded on the upper surface of the ground ring; a cover-shaped fixed end isolating shield is welded on the lower surface of the fixed cover plate, a middle isolating shield is welded on the ledge lower surface at the upper part of an inner chamber of the insulating shell and the upper surface of the ground ring is provided with a ground isolating shield; one end of the moveable end conducting rod runs through the movable cover plate, the corrugated tube, the ground and middle and fixed end isolating shields and then is connected with the movable ground contact; and a movable end grading shield is welded on the upper surface of the movable cover plate. The three-station vacuum arc extinguish chamber specific for the all-solid switch cabinet has the advantages of simple structure and low cost.

Description

technical field [0001] The invention relates to a vacuum interrupter, in particular to a special three-station vacuum interrupter for an all-solid switchgear. Background technique [0002] The existing two-station vacuum interrupter can only realize closing and isolation functions, such as figure 1 The structure diagram of the existing two-station vacuum interrupter is shown, including the insulating shell 1', the static cover plate 2', the static end conductive rod 3', the static contact 4', the shielding cover 5', and the moving contact 6' , moving end conductive rod 7', bellows 8', bellows protective cover 9' and moving cover 10', static cover 2' and moving cover 10' are respectively located at the upper and lower ends of the insulating shell 1', shielding cover 5 'Set in the inner cavity of the insulating shell 1', the static contact 4', part of the static end conductive rod 3', the moving contact 6', part of the moving end conductive rod 7' and the bellows protective c...

AI Technical Summary

Problems solved by technology

Two pairs of moving and static contacts usually need two sets of operating mechanisms to cooperate with them. The corresponding operating mechanisms can use spring operating mechanisms or electric operating mechanisms. In this case, the three-station vacuum interrupter increases The complexity of materials, components and testing increases, and the size of switchgear components increases accordingly, which is very unfavorable for vacuum interrupters

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