A brief history of the development of high-voltage vacuum circuit breaker 1893 Yichang high voltage vacuum circuit breaker, 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 material development, not yet put into practical use. With the development of vacuum circuit breaker 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, Wuhan high-voltage vacuum circuit breakers, vacuum circuit breaker breaking capacity reached 100 kA. China started to develop from 1958 vacuum switch, 1960, Xi'an Jiaotong University, Xi'an switch rectifier plant jointly developed into the first batch of 6.7 kV, breaking capacity of 600 security vacuum switch; subsequently made 10 kV, 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! Circuit breaker "Resist" treatment failures occur, "Resist" The situation is basically the closing operation and reclosing process. Such failures harmfulness Huzhou high voltage vacuum circuit breakers, for example, in case of an accident call for emergency backup power input, if the standby power switch on the circuit breaker to refuse, it will expand the accident. Judgment circuit breaker "Resist" the causes and treatment generally three steps. 1) Check before closing time refused whether caused by improper operation (such as control switches let go too fast, etc.), and then combined with a control switch once again. 2) If the closing is still not successful, check the electrical circuits of each part, so as to determine whether faulty electrical circuit. Check the project are: closing control power supply is normal; closing closing loop control circuit fuse and the fuse is good; closing of the contactor contacts is normal; the control switch to the "switch on" position, look at closing core action is normal. 3) If the normal electrical circuit breaker is still not closing, then to mechanical failure, should be discontinued breakers, report scheduling maintenance treatment. After more than a preliminary examination can determine electrical connection, or mechanical failure. Zaozhuang high-voltage vacuum circuit breakers, 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.