A high-voltage vacuum circuit breaker with vacuum bubbles and anti-flash

Abstract

The invention discloses a high-voltage vacuum circuit breaker with vacuum bubbles to prevent flashover. At the lower end of the vacuum bubble fixing rod, when the outside air is relatively humid, the circular sliding rotator on the sliding rotation mechanism will work, driving the wrinkle gap cleaner and the ionized gas isolation mechanism to move closer to the vacuum bubble at the same time, and clean the wrinkle gap The device cleans the dust on the folded gap of the vacuum bubble, and absorbs the ionized gas through the ionized gas isolation mechanism to ensure less contact between the vacuum bubble and the ionized gas, improve the insulation of the vacuum bubble surface and avoid flashing on the vacuum bubble surface ; At the same time, when the gap between the contact gap plates increases, tension is generated. At this time, the tension on the contacts is converted into pressure by boosting the pressure to ensure that the contact pressure between the contacts is maintained and the contacts are prevented from burning out.

Description

technical field [0001] The invention relates to the field of circuit breaker equipment, in particular to a high-voltage vacuum circuit breaker for preventing flashover of vacuum bubbles. Background technique [0002] Circuit breakers are also called air switches. There are many kinds of circuit breakers at present. Among them, the high-voltage vacuum circuit breaker is the most important switching device in the power system. It is responsible for the dual tasks of control and protection. If the high-voltage vacuum circuit breaker cannot Breaking off in time when a fault occurs may expand the accident and cause a large-scale power outage. However, the current high-voltage vacuum circuit breaker has the following disadvantages: [0003] The vacuum bubble shell on the high-voltage vacuum circuit breaker has a folded structure, which is good for heat dissipation, but it is also because of the folded structure that when the vacuum bubble is working, dust is easy to accumulate in ...

AI Technical Summary

Problems solved by technology

[0003] The vacuum bubble shell on the high-voltage vacuum circuit breaker has a folded structure, which is good for heat dissipation, but it is also because of the folded structure that when the vacuum bubble is working, dust is easy to accumulate in the fold gap. The insulation of the surface of the bubble will decrease, which will seriously cause the surface of the vacuum bubble to flash; and due to the electrical wear of the metal surface of the contact when the arc is broken, it is inevitable, resulting in a large gap and a drop in the contact pressure between the contacts. Insufficient pressure will cause contact If the head is overheated, it will seriously cause the contact to burn out

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