Difference between vacuum contactor and vacuum circuit breaker
The vacuum circuit breaker and vacuum contactor are actually the same as the air contactor of the air circuit breaker, except that the arc extinguishing unit is placed in a vacuum environment, which enhances the adaptability to the environment. At the same time, due to the vacuum insulation and arc extinguishing It has good performance and has been widely used.
Vacuum circuit breaker: It is a kind of protection equipment, which can be automatically opened to protect the circuit when the line fails; at the same time, it can also be manually opened to cut off the load current.
Vacuum circuit breaker is a kind of protective equipment (short circuit, overload, etc.), when a fault occurs in the working line, it can automatically complete the line protection through the opening and closing action, and can also manually operate the opening and closing to complete the line protection. Cut off the load current.
like, VS1-12, 12KV VS1, 24KV VJG-24, ZW32
Vacuum contactor is a device that can withstand repeated operations (strong mechanical life), and can cut off the load current at the same time, but cannot play the role of breaking short-circuit current (remember this). The vacuum contactor has two types of contacts, normally open and normally closed, and has no short-circuit current protection function, and can perform separation and holding actions when receiving a given signal.
Whether it is a vacuum contactor or a vacuum circuit breaker, to put it bluntly, everyone knows that the air circuit breaker and the contactor have similar functions. Vacuum only refers to placing the arc extinguishing unit in a vacuum environment, while air refers to using air medium to complete arc extinguishing. The vacuum arc extinguishing is nothing more than an increase in the adaptability to the environment. At the same time, because the vacuum insulation performance and arc extinguishing performance are better than other arc extinguishing effects, the places where it is applied generally value this performance requirement.
Vacuum circuit breakers can play the roles of overload protection, short circuit protection, control protection and interlock protection, so they are stronger and different from vacuum contactors in these aspects. In the high-voltage field, SF6 vacuum circuit breakers are commonly used, which are generally used in high-voltage circuits above 110kV.
