The intelligent circuit breaker mechanism is located on the front of the circuit breaker. The mechanism adopts a five-link free-release mechanism and is designed in the form of energy storage. This kind of intelligent equipment is mainly used to control and protect the low-voltage distribution network, but you know the smart relay. How does the device work? What is the working principle? Take a look at how the following small series analyzes for you!
The basic working mode of the intelligent circuit breaker is to automatically select the operating conditions preset by the operating mechanism and the arc extinguishing chamber according to the different fault currents monitored. If the normal running current is small, the brake is opened at a lower speed. When the system short-circuit current is large, Higher speed opening for optimum braking effect on electrical and mechanical performance.
This kind of intelligent operation requires the circuit breaker to have controllability in the mechanism action time. At present, 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 very high. Difficult to achieve an ideal controllable state. The circuit breaker adopting the electromagnetic operating mechanism utilizes the technologies of capacitor energy storage, permanent magnet holding, electromagnetic driving, electronic control, etc., when the mechanism determines that there is only one moving part, there is no intermediate conversion medium, and the closing and closing characteristics are only related to the coil parameters, and can pass Microelectronics technology to achieve microsecond control, through the speed characteristics control to achieve intelligent operation of the circuit breaker.
The working process of the intelligent operation circuit breaker is to start the intelligent identification module when the system failure is issued by the relay protection device or the operation signal is sent by the operator, to judge the working condition of the current circuit breaker, and to issue the adjustment device. Different quantitative control information automatically adjusts the parameters of the operating mechanism to obtain the motion characteristics compatible with the current system operating state, and then causes the circuit breaker to operate.
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Label: What is the working principle of smart circuit breaker?
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