Vacuum switch tube direct-current steep-wave bipolar large-current impact aging device and process

Abstract

The invention discloses a vacuum switch tube direct-current steep-wave bipolar large-current impact aging device and process. The device comprises a direct-current arc-striking power supply circuit, a direct-current steep-wave large-current bipolar impact loop and a main charging circuit. The direct-current arc-striking power supply circuit is connected with the direct-current steep-wave large-current bipolar impact loop. The direct-current steep-wave large-current bipolar impact loop is connected with the main charging circuit. According to the invention, an alternating current cathode spot is adopted to perform current aging on a vacuum switch tube contact, and the cathode spot covers the whole surface of the contact in the aging process, so that neither the phenomenon of insufficient aging nor the phenomenon of excessive aging will happen. The insulating property and the reliability of productions are improved. According to the invention, the cleanliness and the insulating strength of a vacuum switch arc extinguishing chamber are improved, and the breaking success rate at the time when the production encounters a rated short-circuit breaking current for the first time is increased greatly.

Description

technical field [0001] The invention relates to the manufacture of electric vacuum devices and the production and manufacture of vacuum switching tubes, in particular to a vacuum switching tube core component used for vacuum switching tubes DC steep-wave bipolar high-current impact aging equipment and its technology. Background technique [0002] The finish of the vacuum switch is directly related to the insulation strength of the vacuum switch, and the finish is improved through voltage and current aging. In recent years, domestic manufacturers have done a lot of research work on the high-current aging test of vacuum switches. The research results show that: the existing DC current aging process has the following two problems: Insufficient aging--the contacts after aging Only less than 1 / 3 of the area is ablated by the arc; over-aging-the contacts after aging are sometimes severely ablated by the arc locally; this directly affects the insulation strength of the vacuum switc...

AI Technical Summary

Problems solved by technology

In recent years, domestic manufacturers have done a lot of research work on the high-current aging test of vacuum switches. The research results show that: the existing DC current aging process has the following two problems: Insufficient aging--the contacts after aging Only less than 1 / 3 of the area is ablated by the arc; over-aging—the contacts after aging are sometimes severely ablated by the arc; it directly affects the insulation strength of the vacuum switch and has a certain impact on the safe operation of the equipment

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