Vacuum interrupter for a vacuum circuit breaker

Abstract

The present invention provides a vacuum interrupter for a vacuum circuit breaker. The vacuum interrupter is installed in the vacuum circuit breaker and is configured to block introduction of a load current or an accident current, and is characterized in that the vacuum interrupter comprises: an upper insulating case; a lower insulating case arranged below the upper insulating case; a fixed electrode portion mounted to be fixed to the inside of the upper insulating case; an actuation electrode portion installed inside the lower insulating case so as to face the fixed electrode portion and beingin contact with or separated from the fixed electrode portion; and an intermediate shield which is disposed between the upper insulating case and the lower insulating case to accommodate the fixed electrode portion and the actuating electrode portion and prevents metal vapor generated during a current breaking process from being deposited on inner walls of the upper insulating case and the lowerinsulating case.

Description

[0001] This application is a divisional application of the Chinese patent application number 201710217129.1, the filing date is April 5, 2017, and the invention title is "Vacuum interrupter for vacuum circuit breaker". Technical field [0002] The present invention relates to a vacuum interrupter for a vacuum circuit breaker, and more specifically to a vacuum interrupter in which an intermediate shield provided in the vacuum interrupter is arranged on the same straight line as an insulating housing to reduce the insulating housing It is a vacuum interrupter for vacuum circuit breakers with full dimensions and cost-saving manufacturing. Background technique [0003] Generally speaking, circuit breakers and switches are devices used to directly control the power supply to loads by opening or closing circuits in the power system. As examples of circuit breakers and switches, circuit breakers having the ability to block fault current including load current and switches for opening or ...

AI Technical Summary

Problems solved by technology

That is, since the intermediate shield 16 and the auxiliary shield 17 are arranged inside the insulating housing 13, the inner diameter of the insulating housing 13 should be greater than the outer diameter of each shielding 16, 17, thus each shielding 16, 17 will The insulating housing 13 in which 17 is received should be manufactured in a large size

[0011] In addition, since the size of the vacuum interrupter 10 increases, the number of ceramic parts used increases, so that there occurs a problem that the manufacturing cost of the vacuum interrupter greatly increases.

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