In smart grid, RMU circuit breakers achieve automatic control through the integration of smart control unit, the use of electronic vehicle departure units, the application of contactless sensors, support for remote communication and automated management, and self-diagnosis and adaptive capacity. The following is a detailed description of its automatic control implementation:
Integrated intelligent control unit: The RMU circuit breaker integrates an intelligent control unit consisting of three modules: data acquisition, intelligent identification and actuator. The data acquisition module monitors the parameters such as three-phase current and line voltage in real time. Based on the collected data, the intelligent identification module automatically identifies the normal operation, overload and short circuit of circuit breaker. The actuators then performs corresponding actions, such as opening and closing, based on the judgment results of the intelligent identification module.
Electronic tripping unit: Traditional circuit breakers usually use thermomagnetic tripping unit, while the RMU circuit breaker use electronic tripping unit. Electronic tripping device has higher sensitivity and reliability, can detect the current and short circuit more accurately, and can be tripped quickly. In addition, the electronic tripping unit supports function configuration and parameter setting through DIP switches, which makes the protection characteristics of circuit breaker more flexible and diverse.
Applications of contactless sensors
The RMU circuit breaker use contactless sensors to detect the circuit breaker's status, such as contact position and coil current. This detection method not only improves detection accuracy but also avoids the wear and potential failure of traditional contact sensors. By monitoring the status of circuit breakers in real time, the intelligent control unit can detect potential faults and take corresponding preventive measures to improve the stability and reliability of the power system.
Support for Remote Communication and Automated Management
The RMU circuit breaker support the transmission of on-off commands and equipment parameters through fibre-optic interfaces, enabling remote communication with the upper control system. This makes it possible to automate power system management, such as remote monitoring, remote operation, fault location and isolation. Through remote communication, maintenance personnel can understand the operation of circuit breakers in real time, detect and deal with faults in a timely manner, thus shortening power outage time and improving power supply reliability.
the RMU circuit breaker intelligent control unit has self-diagnosis and self-adaptability, and can monitor the circuit breaker's operating status and performance parameters such as contact wear and insulation performance real time. Once an anomaly is detected, the intelligent control unit immediately sends out an alarm signal and takes appropriate precautions. In addition, the intelligent control unit is self-adaptive and can automatically adjust the protection characteristics of circuit breaker according to the variation of power grid parameters to ensure reliable operation under various working conditions.
