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Insulation of vacuum interrupter


Vacuum circuit breaker insulation is divided into fracture insulation, interphase insulation and insulation to the ground. vacuum interrupter in the vacuum circuit breaker in addition to breaking the working current and short circuit current, but also bear the task of fracture isolation. At present, the manufacturer of interrupter is good and bad, in order to ensure the vacuum circuit breaker in the safe and reliable operation of the power system, vacuum interrupter as the core of the vacuum circuit breaker device to ensure its insulation capacity, select the quality assurance manufacturers is essential The
Vauum interrupter contactor insulation is divided into internal insulation and external insulation, the internal insulation is divided into static insulation and dynamic insulation. In the type test, the insulation of the vacuum interrupter mainly assess the short-time power frequency withstand voltage and lightning impulse withstand voltage, and in actual use, due to grid conditions and the use of different environments, vacuum interrupter insulation needs Consider the factors, such as breaking the small inductor current cut off the over-voltage, open the fault load when the heavy blow through the voltage and in the high temperature, hot and humid, dirty, high altitude and other harsh conditions of insulation tolerance ability. In view of the above factors, the insulation of the vacuum interrupter mainly from the insulation design, manufacturing process and the use of three ways to consider. Insulation design and manufacturing process is done by the manufacturer of the vacuum interrupter, while the use of the need for more vacuum circuit breaker manufacturers to consider.

Vacuum interrupter in the design and manufacture of the insulation after the completion of the guarantee, does not mean that can be used under any conditions, empty interrupter in the practical application of the insulation problem is limited by the use of conditions, circuit breaker manufacturing Manufacturers must be based on the use of end-users place to make a different design to meet the insulation needs.
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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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What is the role of the glass enclosure of the vacuum interrupter?

Arc is actually the shape of the current in the air, in the final analysis, or the current, the conductivity of the metal is good, of course, can attract current, so the arc ran to the metal grid, the arc energy, of course, can burn metal grating, so the energy of the arc Not on the consumption of it, like Dayu flood control, not to be out is not possible, the key is to ease the arc burning bar that it will not burn the contact, so only for the arc chamber breaker Can be reused. Part of the main screen shield and bellows shield, generally use oxygen-free copper or stainless steel main effect: 1) to prevent the contact in the arcing process to produce a large number of metal vapor and droplet splashing, pollution of the inner wall of the insulating shell, to avoid causing the vacuum interrupter shell insulation strength decreased or flashover. Bellows shield is mainly to protect the bellows from the corrosion of metal vapor and lead to leakage, and now some of the desi...
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