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Pressure measurement of the vacuum interrupter

Pressure measurement is an important one in the vacuum interrupter parameter test. The pressure in the arc chamber is the basis for the formation of air blowing, but too high pressure will cause excessive requirements for the strength of the arc chamber housing. Therefore, the arc valve optimization design of an important goal is: to improve the breaking performance at the same time, as much as possible to reduce the pressure inside the interrupter.


The main contents of the design of the low-voltage circuit breaker interrupter include: the shape and size of the outlet; the shape and arrangement of the grille; the structure of the exhaust channel; the size and structure of the arc chamber; the choice of gas-generating material.


In the arc chamber to place gas production materials, on the one hand the use of gas to improve the pressure of the Vacuum interrupter for load break switch to promote air blowing; the other hand, the use of gas, such as hydrogen and other components conducive to cooling the arc, can significantly improve the Breaking performance, and thus select the appropriate gas production materials, the optimal design of the arc chamber is very important.

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Insulation of vacuum interrupter

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What is the effect of the arc extinguishing device?

Is to pull the arc, sub-section, Vauum interrupter contactor device is to prevent the contact when the arc spark caused by unnecessary losses caused by the set. In a high current circuit, the contact or switch off and forth will produce arc spark, may cause the following hazards: 1, burn contact contacts, etc., over time so that the circuit is bad, resulting in circuit damage. 2, may be on the human eye, skin and other arc burns caused by the human body can not be speculation of the harm.   3, in some places sensitive to arc spark, such as gas plant or filling the flammable gas where a little bit of the spark sparks may cause an explosion and so on. 4, the spark sparks may be with the circuit for some electronic products (such as integrated circuits) caused by breakdown damage. So for safety reasons, in a large current may cause contact contacts and other places have to install a metal box to shield the spark sparks, vacuum interrupter is the most common.
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The process of vacuum interrupter production

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