Vacuum Contactor vs. Vacuum Circuit Breaker
Vacuum contactor is a device that can withstand multiple operations (strong mechanical life). It can cut off the load current at the same time, but can not break the short-circuit current (keep this in mind). The vacuum contactor has two contacts, normally open and normally closed, and does not have the function of short-circuit current protection. When a given signal is received, it can perform separation and hold actions.
The vacuum contactor can cut off the load current, operate frequently (start and stop the motor), and connect and disconnect large current frequently. In these aspects, it has strong capacity and high rated working voltage. It is recommended to use it together with the high-voltage vacuum circuit breaker in the high-voltage environment, which is more safe and reliable.
"Vacuum circuit breaker" is named because its arc extinguishing medium and the insulation medium of contact clearance after arc extinguishing are high vacuum. It has the advantages of small volume, light weight, suitable for frequent operation, arc extinguishing without maintenance, and is widely used in distribution networks. Vacuum circuit breaker in automation online shop is an indoor power distribution device in 3-10kV, 50Hz three-phase AC system, which can be used for the protection and control of electrical equipment in industrial and mining enterprises, power plants and substations. It is especially suitable for places requiring no oil, less maintenance and frequent operation. Circuit breakers can be configured in central cabinets, double cabinets and fixed cabinets for control and protection of high voltage electrical equipment.
Vacuum circuit breaker is a kind of protection equipment (short circuit, overload, etc.). When the working line fails, the line protection can be completed automatically through opening and closing action, or can be opened and closed through manual operation, cut off the load current. 11kV vacuum circuit breaker can play the role of overload protection, short circuit protection, control protection and interlocking protection, so it is stronger than vacuum contactor in these aspects and different from vacuum contactor.
Analogus to ordinary home circuit, VCB is like a circuit breaker at home inside a panel and VC is a relay in our any of instruments at home.