A brief history of the development of high-voltage vacuum circuit breaker in 1893, the United States, Rittenhouse proposed simple structure of the vacuum interrupter, and received a design patent. 1920 Swedish company first made Buddha plus vacuum switches. 1926 and other published research also shows the current vacuum carve off the possibility, but the breaking of small capacity, and limited technical level of vacuum and vacuum breaker Which Yulin material development, not yet put into practical use. With the development of vacuum technology, the 1950s the United States was made the first cut is suitable for the special requirements such as vacuum capacitor bank switching, breaking current level is still parked in the 4000 Ann. Due to advances and breakthroughs in the study of the structure of the vacuum switch contact material vacuum smelting technology acquired in 1961, began producing 15 kV, breaking current of 12.5 kA vacuum breaker. 1966 trial made 15 kV, 26 kA and 31.5 kA vacuum circuit breakers, vacuum circuit breaker so into the high-voltage, high-capacity power system. The mid-1980s, the vacuum circuit breaker breaking capacity reached 100 kA. China started to develop from 1958 Which vacuum breaker switch Hanzhong, Xi'an Jiaotong University in 1960 and Xi'an switch rectifier plant jointly developed into the first batch of 6.7 kV, breaking capacity of 600 security vacuum switch; subsequently made 10k V, breaking capacity of 1.5 kA three-phase vacuum switch. 1969 Love photoelectron tube plant and Xi'an High Voltage Apparatus Research Institute made a 10 kV, 2 kA single-phase vacuum switch quickly. After 70 years, China has been able to independently develop and produce a variety of vacuum switches. Welcome to inquire buy! Breaker is the ability to closing, carrying and breaking currents under normal circuit conditions and to closing, carrying and breaking currents under abnormal switchgear circuit conditions within the stipulated time. Breaker can be used to allocate power, not frequently start asynchronous motor, the implementation of protection of power lines and motors, etc., when they are severe overload or short circuit and undervoltage fault can automatically cut off the circuit, which functions as a fuse switch and by combining thermal relays, etc. owe. And after breaking the fault current is generally no need to change parts. At present, has been widely used. Divided according to their use of high-voltage circuit breaker breaker, and low-voltage circuit breakers, high and low boundaries divide rather vague, generally referred to as high-voltage electrical 3kV above. Welcome to inquire buy! Which is good Tongchuan breaker, Huayi Electric Power (certified), the circuit breaker is provided by Xian Huayi power plant. Xian Huayi power plant (www.xahy.com) is a leader in Xi'an, high voltage circuit breakers, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Huayi power in leadership with the staff warmly welcome all inquiries negotiations to create electricity Huayi a better future.