JCZR-12 high-voltage vacuum contactor - fuse combination (referred to as combination) is a combination of indoor high-voltage AC vacuum contactor and high-voltage current-limiting fuse with combined control and protection functions, commonly known as F-C loop. Mainly applicable to 10kV and below; The control and protection of high-voltage electrical appliances in power systems with low load, such as power plant and plant power systems, are especially suitable for those requiring frequent operation of motors, transformers, etc.

The essential difference between a combination and a circuit breaker is that the combination separates the protection from the control function. The control function is completed by the contactor, and the protection function (such as the opening of short-circuit current) is completed by the fuse meter. The high pressure vacuum contactor has the characteristics of long life, frequent operation, simple structure and low price. The current limiting fuse has the characteristics of large breaking capacity, short breaking time (the larger the short circuit current is, the shorter the time between the short circuit current is) and can effectively limit the short circuit current. Therefore, the control and protection of high-voltage motor, transformer and so on use of combination electric appliances, not only reasonable function, but also economic science.