Vacuum Circuit Breaker Vacuum material smelting technology

Vacuum circuit breaker having a small size, light weight, suitable for frequent operation, maintenance arc without the advantages of the application in the distribution network is more popular. A brief history of 1893, proposed a simple structure vacuum interrupter, and get a design patent. 1926 published mcb circuit breakeralso shows that the current in the vacuum carve off the possibility, but the breaking capacity is small, but also by the development of vacuum technology and air circuit breaker level of restrictions, still can not put into practical use. With the development of vacuum technology, the 1950s produced the first batch of capacitors for cutting special requirements such as vacuum switch, breaking current kA still stopped at four levels. As power transformers in technology vacuum smelting materials and structure of the vacuum switch contacts on the breakthrough in 1961, breaking current of 12.5 kA vacuum circuit breakers. 1966 trial made ​​15 kV, 26 kA 31.5 kA vacuum circuit breaker, so that the vacuum breaker into a high-voltage, large-capacity electrical system. Mid-1980s, a vacuum circuit breaker breaking capacity has reached 100 kA. From 1958 started to develop a vacuum switch, 1960, switch rectifier plant jointly developed into the first batch of 6.7 kV, breaking capacity of 600 amp vacuum switch; subsequently made ​​10 kV, breaking capacity of 1.5 kA phase vacuum switch. High Voltage Apparatus Research Institute made ​​a 10 kV, 2 kA fast single-phase vacuum switch. 70 years later, has been able to independently develop and produce all kinds of vacuum switch.