Surface breakdown type two-pair-rod electrode structural triggered vacuum switch

Abstract

The invention discloses a surface breakdown type two-pair-rod electrode structural triggered vacuum switch. The triggered vacuum switch is of a three-section structure, comprising a corrugated ceramic housing at the upper section, another corrugated ceramic housing at the lower section, a metal shielding cover in the middle section, an upper electrode, a lower electrode, a triggering electrode, an upper electrode metal connecting rod, an upper electrode flange plate, a lower electrode metal connecting rod and a lower electrode flange plate; the upper electrode and the lower electrode are arranged in the metal shielding cover; the upper electrode flange plate is connected with the corrugated ceramic housing at the upper section; the lower electrode flange plate is connected with the corrugated ceramic housing at the lower section and forms a closed housing with the metal shielding layer; the upper electrode flange plate is connected to the corrugated ceramic housing at the upper section, and the lower electrode flange plate is connected to the corrugated ceramic housing at the lower section, so as to effectively increase the creepage distance between the upper electrode flange plate and the lower electrode flange plate. The triggered vacuum switch is high in working voltage, large in arcing area, high in transfer coulomb during conducting, long in service life under large current, uniform in electrode ablation degree, and high in power frequency withstand voltage after quenching of arc.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrical appliances, and more specifically relates to a surface-triggered vacuum switch triggered by two pairs of rod structures. Background technique [0002] The trigger vacuum switch uses vacuum as the main gap insulation medium and arc extinguishing medium between the cathode and anode, and uses a specially designed trigger electrode to control the switch to close. With the development of pulse power technology, it is required that the matching high-power switch can work under high voltage and high current, and can be triggered stably and multiple times under the condition of small trigger energy. The main electrode structure of the traditional trigger vacuum switch of the equipment is mostly a flat electrode or a multi-rod electrode structure. There are two main trigger electrode structures: surface trigger type and field breakdown type. [0003] At present, the traditional trigger va...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a surface-triggered type two-pair rod structure trigger vacuum switch, which aims to solve the problem of low operating voltage of the switch in the prior art, and arcing after working many times under high current. The generation of metal plasma will be deposited on the trigger edge surface, which will reduce the life of the switch

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