Solid insulation full-sealed three-position disconnecting switch

Abstract

A solid insulation full-sealed three-position disconnecting switch solves the problem that due to breakdown or flashover a fake fracture of an existing disconnecting switch, a power cut segment of a major loop is electrified. The solid insulation full-sealed three-position disconnecting switch comprises an insulation arc-isolating cover, an insulation integrated line outgoing bottom plate, an insulation static contact seat and an insulation movable contact seat. The solid insulation full-sealed three-position disconnecting switch is characterized in that an upper sealing gasket and a lower sealing gasket are assembled at the butt joint positions of the insulation arc-isolating cover and the insulation integrated line outgoing bottom plate respectively, and a metal shielding earth plate is installed between the sealing gaskets in butt joint in a clamped mode, so that full sealing is realized; the insulation static contact seat is fixedly installed at the upper end in the insulation arc-isolating cover, and the insulation movable contact seat is fixedly installed on the insulation integrated line outgoing bottom plate provided with a line outgoing cone; the side wall of the insulation arc-isolating cover is provided with an upper observation window and a lower observation window; the line outgoing end of the insulation integrated line outgoing bottom plate is connected with the line outgoing cone through an average-voltage induction shielding ring. The solid insulation full-sealed three-position disconnecting switch is reasonable in structural design and high in insulating strength; an isolating fracture is visible, the disconnecting switch is not provided with a fake fracture in a true sense, and therefore safety and reliability of isolation are remarkably improved.

Description

technical field [0001] The invention relates to an insulating switch unit used in a solid insulating cabinet, in particular to a solid insulating fully sealed three-position isolating switch suitable for a solid insulating cabinet in a three-phase AC power grid and solving the problem of false fractures in the isolating switch. Background technique [0002] At present, for the solid insulation cabinets in the three-phase AC power grid produced in China, according to relevant literature reports, most products still use traditional air-insulated disconnectors and grounding switches in terms of disconnector breaks. For example, the publication number is CN102360986A "a solid-sealed full vacuum switchgear", which uses a vacuum switch chamber as an isolated grounding conductive circuit. The disadvantage of this device is that there is no visible fracture, and the current domestic vacuum online monitoring technology is not up to standard, once the vacuum switch chamber leaks, it w...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a solid-insulated fully-sealed three-position isolating switch, which solves the problem of fracture breakdown or flashover in the existing three-position isolating switch "false fracture", which will cause the power failure line section of the main circuit to be electrified and increase the fracture. The probability of breakdown and other issues, its structural design is reasonable, the insulation strength is high, the isolation fracture is visible, and the real isolation switch fracture without "false fracture" is realized, which significantly improves the safety and reliability of isolation

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