35kv outdoor ac isolation switch

Abstract

A 35kV outdoors alternating current isolation switch is used for deciliter conversion of power circuit. The isolation switch comprises a under frame, an insulator, a connecting plate, a contact knife, an insulating tension pole, a crank and a rotating shaft; the under frame is provided with a ground contact; one end of the contact knife is hinged with the connecting plate; the other end is in contactable link with an income contact provided on the connecting plate, and is in contactable link with the ground contact on the under frame; middle of the contact knife is hinged with the upper end of the insulating tension pole; the lower end of the insulating tension pole is hinged with the crank; the crank is fixed with the rotating shaft provided on the under frame; the rotating shaft is a universal driving shaft permeating three phase; a spring is connected between the crank and the ground contact on the under frame. The invention not only realizes three phase breaking or closing brake by only once action, but also breaks off ground when closes brake, and realizes the three phase ground at breaking brake; and the isolation switch has the characters of low manufacturing cost, high safe reliability, good mechanical strength and long service life.

Description

technical field [0001] The invention relates to the technical field of electric switches, in particular to a high-voltage air circuit breaker without an arc extinguishing or anti-arc device. Background technique [0002] In the power transmission and transformation equipment of the power system, the isolating switch is an important device to realize the switching line of opening and closing and to ensure the safety of power failure maintenance. Linkage, but for safety, the outlet end must be grounded after the switch is opened, so a switch knife must be equipped to achieve three-phase grounding, which increases the production cost and is not very convenient to operate. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a three-phase switch-off or switch-on linkage with only one action, and at the same time disconnect the ground when the switch is closed, and realize three-phase grounding when...

AI Technical Summary

Problems solved by technology

[0002] In the power transmission and transformation equipment of the power system, the isolating switch is an important device to realize the switching line of opening and closing and to ensure the safety of power failure maintenance. Linkage, but for safety, the outgoing line must be grounded after the switch is opened, so a switch knife must be equipped to achieve three-phase grounding, which increases the production cost and is not very convenient to operate

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