Basic Working Mode Of Intelligent Circuit Breaker

The basic working mode of the intelligent circuit breaker is to automatically select the operating mechanism and the preset working conditions of the arc extinguishing chamber according to the different fault currents detected. Higher speed opening for optimum opening in electrical and mechanical performance.

This kind of intelligent operation requires the circuit breaker to have controllability in the action time of the mechanism. The pneumatic operating mechanism, hydraulic operating mechanism and spring operating mechanism commonly used in circuit breakers have large control time dispersion due to factors such as intermediate conversion medium, and their motion characteristics are difficult to achieve. achieve the ideal controllable state. The circuit breaker with electromagnetic operating mechanism uses technologies such as capacitor energy storage, permanent magnet holding, electromagnetic drive, electronic control, etc. When the mechanism is determined, there is only one moving part, there is no intermediate conversion medium, and the opening and closing characteristics are only related to the coil parameters. Microelectronics technology is used to realize microsecond-level control, and the intelligent operation of circuit breakers is realized by controlling the speed characteristics.