High voltage circuit breakers in performance: National Electrical Switch Factory, www.guofadq.com
In roller breaker rated voltage between 0-7.2KV, can use 1 assembled into metal manufactured goods indoor enclosed switch equipment line, also can be in an outdoor installation assembly of individual substations. The air circuit breaker to replace breaking unit interior application of oil filling, but now has been replaced by the vacuum circuit breaker (about 35000 volts ). As the high voltage circuit breaker, it is also protective current induction relay through the operation of current transformer. Medium-voltage circuit breakers are characterized by international standards, such as IEC 62271. Medium voltage circuit breaker are almost always use different sensors and current protection relay, rather than relying on the built-in thermal current or magnetic field sensor.
Medium-voltage circuit breakers, according to extinguish the arc of the medium can be divided into: vacuum circuit breaker, the rated current to 3000A, the circuit breaker current interruption of the container to create and vacuum arc extinction research. It is generally applicable for high voltage of about 35000A, corresponding roughly in the power system voltage range. Vacuum circuit breaker between often have a life expectancy of relatively large air circuit breaker. Air circuit breaker, the rated current to 10000A, features are often completely adjustable stroke includes configurable threshold and delay. Usually by electronic control, although some types of microprocessor control unit through a complete electronic process. Usually used for easy maintenance of local, mainly distributed in a large industrial plant. Six SF6 circuit breaker arc chamber filled with sulfur gas fire extinguishing.
Medium voltage circuit breaker, can be connected to the circuit by the bolt connecting bars or wires, especially in outdoor. In the switch line manufactured goods of Middle-voltage Circuit Breaker in building construction is often pulled out, so that the circuit breaker is removed, without disturbing the main circuit is connected, the electric operation or cranking mechanism, to break away from its shell breaker.
High voltage circuit breaker
Electrical transmission networks are defined in a high voltage power transmission, but the work is generally considered to be 72.5KV or higher, according to a recent definition by an International Electrotechnical Commission ( IEC ). High voltage circuit breaker were almost all electromagnetic induction, and current protection relay through the operation of substation relay protection plans may be very complex, protective earthing fault types of devices and different bus overload or ground.
High voltage circuit breaker, according to arc quenching media generally have.
Bulk oil
Minimum oil
Air blast
Vacuum
Due to excessive insulating oil leak environment and cost issues, most of the new circuit breaker arc quenching gas.
Circuit breaker comprises a casing failure mechanism or line potential, high voltage AC circuit breaker often rated high amounts to 765000 volts. 1200KV breaker market may soon produce.
High voltage circuit breaker used for transmission system can be arranged in a three-phase line single rod tripping tripping, and not all three poles, as these types of faults and improve the stability and usability of the system.
Country electric switch factory production and sales of low-voltage electrical appliances, low-voltage switch.