Extra-high-voltage earthing switch with series-wound main circuit and arc extinguishing chamber for opening and closing induction current

Abstract

The invention discloses an extra-high-voltage earthing switch with series-wound main circuit and arc extinguishing chamber for opening and closing an induction current. The extra-high-voltage earthing switch comprises an earthing switch body, an arc extinguishing chamber and an arc extinguishing chamber operation mechanism; the earthing switch body comprises a mounting base, an earthing base, a porcelain bottle, a main earthing knife switch, a small earthing knife switch, a main earthing knife switch operation mechanism and a small earthing knife switch operation mechanism; a main static contact is mounted at the top end of the porcelain bottle; the earthing base is mounted above the mounting base through an insulating column; the bottom end of the main earthing knife switch is mounted on the earthing base and connected with the main earthing knife switch operation mechanism, and a main movable contact is mounted at the top end; the bottom end of the small earthing knife switch is mounted on the mounting base and connected with the small earthing knife switch operation mechanism, a small movable contact is mounted at the top end, and a small static contact is mounted on the earthing base; and one end of the arc extinguishing chamber is connected with the arc extinguishing chamber operation mechanism while the other end is connected with the earthing base. The extra-high-voltage earthing switch has the advantages of simple structure, high reliability, capacity of opening and closing the high-parameter induction current and the like.

Description

technical field [0001] The invention mainly relates to the technical field of electric power equipment, in particular to an ultra-high voltage grounding switch in which a main circuit is connected in series with an arc extinguishing chamber to open and close induced current. Background technique [0002] With the development of electric power construction, the power grid continues to expand and its capacity continues to increase. In order to reduce the area occupied by the transmission corridor, the use of double-circuit parallel overhead high-voltage transmission lines on the same tower is increasing day by day, and the grounding switch for opening and closing induced currents is more and more widely used. Recently, with the massive construction of EHV and UHV power transmission and transformation projects, the number of long-distance and large-capacity transmission lines has increased, and the parameters of the induced current generated by the lines have also increased acco...

AI Technical Summary

Problems solved by technology

At present, there is no grounding switch capable of opening and closing the highest parameter induction current that meets the system requirements at home and abroad

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