3、欠电压保护、自诊断以及自锁和报警等功能。关键词：电力系统；断路器；永磁操动机构AbstractIn today's world, the power in People's Daily life and has a very important role in industrial production. In perfect power system, the circuit breaker is essential to the switchgear. Circuit breaker can not only can cut system run
4、-time no-load current and load current, and in the power system failure, can cooperate with relay protection device to cut off the load current, to the safe and stable operation of the power system plays an essential role.High pressure areas often choose high voltage vacuum cir
5、cuit breaker, the circuit breaker is different from other arcing medium. High voltage vacuum circuit breaker is light quality, simple structure, convenient operation maintenance and won't cause pollution to the environment, so once used, the rapid development of the mainstream
6、in the field of high voltage switch. Traditional high voltage vacuum circuit breaker according to its operation mechanism can be divided into electromagnetic and electric spring type, early, electromagnetic operating mechanism of the well to meet the demand of the vacuum arcing
7、 chamber, obtained the development and application, but due to the complexity of its mechanical structure high failure rate and the emerging of the permanent magnetic operating mechanism.The main use of permanent magnetic actuator magnetic force of permanent magnet that kept th
8、e breaker in the open or closed position to reduce the
