The application of vacuum interrupter in my country's power supply system began in 1978. Because of its light weight, simple structure and long service life, the vacuum interrupter was quickly applied to the operation and maintenance of the current department. Has been recognized by the majority of technical personnel. The quality of the vacuum interrupters produced in China in the early days was not stable enough, the current-carrying overvoltage was too high during the operation, and some vacuum interrupters still had air leakage. The early vacuum interrupter manufacturing technology is not mature, so it has certain dangerous properties, especially the quality of the vacuum interrupter.

After the 1980s, it began to slowly solve the problem of the vacuum interrupter, improved its material selection, and realized the advantage of arc extinguishing without maintenance. Through the technological update every year, the quality of the vacuum interrupter has reached the international standard only by learning emerging technologies from abroad. During this period of exploration, many relevant provisions on high-voltage vacuum circuit breakers have been issued, and a series of domestic and foreign regulations have been formulated. standard

By the time of the Tianjin vacuum switch application promotion conference in 1992, the manufacturing technology of vacuum interrupters in my country had entered the forefront of the same type of products in the same industry in the world, becoming a new historical turning point in the application and manufacturing technology of vacuum interrupters in my country.