Jan 07, 2019
A circuit breaker is a switching device that can close, load and break the current under normal circuit conditions and close, load and break the current under abnormal circuit conditions within a specified time. Circuit breaker according to its use range is divided into high voltage circuit breaker and low voltage circuit breaker, high and low voltage boundary division is relatively fuzzy, generally referred to as high voltage electrical appliances more than 3kV.
Circuit breakers can be used to distribute power, infrequently start the asynchronous motor, to protect the power line and the motor, when they have serious overload or short circuit and undervoltage and other faults can automatically cut off the circuit, its function is equivalent to the combination of fuse switch and underheat relay. In addition, it is generally not necessary to change parts after breaking the fault current. At present, it has been widely used.
Electricity generation, transmission, use, distribution is an extremely important link. Distribution system including transformers and various high and low voltage electrical equipment, low voltage circuit breaker is a widely used electrical appliances.