The working principle and operation method of high voltage vacuum circuit breaker are briefly described

It is understood that the operating mechanism of the high-voltage vacuum circuit breaker is the earliest use of electromagnetic institutions, and then improved as a spring mechanism, the current application of the circuit breaker in the electricity market is still dominated by the spring mechanism. But in recent years, the birth and promotion of an actuator with new technology are gradually reducing the failure rate of the circuit breaker, and the reliability and durability are greatly improved.

High voltage vacuum circuit breaker adopts a new high reliable permanent magnetic actuator structure. This structure when there is only one of the main moving parts, without mechanical removal, locking device, fault source, high reliability, and long service life, generally more than 100 thousand times, which can control the switching phase, realize synchronous control, thereby reducing the impact of voltage and current of the system, improve the whole life.

In fact, as with other power equipment, the high-voltage vacuum circuit breaker first entered China from abroad. As early as the end of the 1990s, vacuum circuit breakers with permanent magnets were introduced into our country. Vacuum circuit breakers were originally developed by Britain and the United States, and then developed to other countries such as Japan, Germany and the former Soviet union. Since 1959, the theory of vacuum circuit breaker has been studied in our country, and various vacuum circuit breakers have been formally produced by the beginning of 1970s. Vacuum interrupter, actuator, insulation level of manufacturing technology innovation and improvement, the development of vacuum circuit breaker is very fast, has made a series of major achievements in large capacity and miniaturization, intelligence and reliability research. Vacuum circuit breaker with good arc resistance, suitable for frequent operation, long service life, high electrical reliability, long maintenance cycle advantages, in today's China's urban and rural power grids, power, metallurgy, chemical industry, electric railway and mining industries has been widely used. Products from the past several varieties of ZN1-ZN5 to now dozens of models, varieties, rated current reached 4000A, breaking current reached 5OKA, and even 63kA, voltage reached 35kV level. ZW32-12 permanent magnetic vacuum recloser adopts a unique design of permanent magnet mechanism and a high reliability MGK intelligent controller. Moving chain reduces energy consumption and noise.

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