Design of an On-line Monitoring System of Mechanical Characteristics of High Voltage Circuit Breakers

On-line Monitorin of Mechanical Characteristics of High Voltage Circuit is a effective means to judge the reliable operation of high voltage circuit breaker. In order to improve the safety, reliability and informatization index of high voltage apparatus in power system, developing a new kind of on-line monitoring system of mechanical characteristics of circuit breaker. This paper introduces an on-line monitoring method for mechanical character of High voltage circuit breaker by using zero magnetic flux Hall Current sensor to monitor the current characteristics of the opening or closing coils and using photoelectric displacement sensor to monitor the dynamic contactor displacement characteristics. The system using DSP28335 finish the ampling control of the chip ADS8505, using C language finish the software programming. Through the CAN bus and RS485, monitoring terminal data information transfer to intelligence component (IED), Finally the paper introduces the experts software of related diagnosis strategy to equipment judgment. The test results show that the system has greatly improved in precision, stability and reliability, and has a greater value in using and generalization.