Circuit breakers are a type of technical equipment that can protect power lines and motors at all times based on the magnitude of the current. The development of technology has also promoted its ultimate integration with intelligent technology, and intelligent circuit breakers have also begun to develop in the market.

Circuit breakers can be used to distribute electrical energy, infrequently start asynchronous motors, protect power lines and motors, and automatically cut off circuits in the event of severe overload, short circuit, and undervoltage faults. Their function is equivalent to a combination of fuse type switches and over/under heating relays.

At present, circuit breaker equipment has been widely used in the development and construction process of the power system. With the rise of smart grid construction, higher requirements have been put forward for the technical level of supporting equipment. The development of intelligent distribution and circuit breaker products is becoming increasingly intelligent.

Intelligent circuit breaker is a new circuit breaker secondary system established using microelectronics, computer technology, and new sensors. Its main feature is the execution unit composed of power electronic technology and digital control devices, replacing conventional mechanical auxiliary switches and auxiliary relays. The new type of sensor, combined with digital control devices, independently collects operational data, can detect equipment defects and faults, and issue alarm signals before defects become faults, in order to take measures to avoid accidents. The intelligent circuit breaker realizes electronic operation, transforms mechanical energy storage into capacitive energy storage, and transforms mechanical transmission into frequency converter driven directly by the motor, improving the reliability of the mechanical system.

Intelligent circuit breakers are used to control and protect low-voltage distribution networks. Intelligent circuit breakers are generally installed in low-voltage distribution DW45 universal circuit breaker cabinets as the main switch to provide overall protection. The technical performance of DW45 universal circuit breaker has reached the advanced level of similar products internationally.

The working process of intelligent operating circuit breakers is as follows: when a system fault occurs and the relay protection device sends an opening signal or the operator sends an operation signal, the intelligent recognition module is first activated to determine the current working conditions of the circuit breaker. Different fixed control information is sent to the regulating device to automatically adjust the parameters of the operating mechanism, in order to obtain motion characteristics that are suitable for the current system working state, and then the circuit breaker is activated. [Kailong Electrics]