Manual Operation Vacuum Circuit Breaker

The manual operation vacuum circuit breaker is an outdoor distribution equipment with rated voltage of 24kV and three-phase AC of 50Hz.It is mainly used to open and close load current, overload current and short circuit current in power system.It is suitable for the protection and control in the power distribution system of substation and industrial and mining enterprises, as well as the places where the rural power grid is frequently operated.The circuit breaker has the characteristics of small volume, light weight, anti-condensation, free maintenance and so on. It can adapt to the harsh weather conditions and dirty environment.

The body part of the vacuum circuit breaker is composed of a conductive circuit, an insulating system, a seal and a housing.The overall structure is three-phase box type.The conductive circuit is composed of an incoming and outgoing conductive rod, an incoming and outgoing insulation support, a conductive clamp, a soft connection and a vacuum arcing chamber.The mechanism is electric energy storage, electric opening and closing, and has manual function.The whole structure is composed of closing spring, energy storage system, over current release device, opening and closing coil, manual opening and closing system, auxiliary switch, energy storage indicator and other components.

The working principle of vacuum circuit breaker is different from that of other circuit breakers. There is no conductive medium in vacuum, which makes the arc extinguish quickly. Therefore, the distance between the dynamic and static contacts of the circuit breaker is very small.