Research and Application of Non-Contact Live Detection Technology for High-Voltage Circuit Breaker Based on Eddy Current Change

With the continuous growth of power system capacity, the number of power control and protection highvoltage circuit breakers has greatly increased. The reliability of high-voltage circuit breaker as the connection link between power and electrical equipment is of great significance to ensure the safe operation of power system. The performance test of high-voltage circuit breaker is mainly related to the preventive test of equipment and regular maintenance during power failure, so as to replace the mechanical performance test of parts and operating mechanism. Experience shows that frequent operation and excessive overhaul will reduce the reliability of high-voltage circuit breaker. Therefore, it is very important to implement fault diagnosis or monitoring of high-voltage circuit breaker, timely understand the situation, grasp the characteristics and trends of operation, and improve the reliability of operation. Non-contact live detection technology is a new type of non-contact detection equipment for high-voltage circuit breakers. It can detect whether there is live current in the circuit through the electric field generated by the small metal plate connected to the surface of the circuit breaker. The principle and working principle are as follows: when the highvoltage current passes through the metal plate, it will generate an electric field that can be detected by the antenna. Compared with other types of contact detection equipment, non-contact live detection technology has many advantages and benefits, such as no need for any special training or skills.