The ZW7-40.5(M) series outdoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz outdoor high-voltage electrical
equipment with a rated voltage of 40.5kV. When equipped with a high-voltage permanent magnet actuator, it can achieve on-site and remote fast opening and closing operations . The design performance meets the requirements of the national standard GB1984-89 "AC High-Voltage Circuit Breakers" and complies with the requirements of IEC 6100-4.1:2000" Electromagnetic compatibility testing and measurement techniques - General introduction on immunity testing ".The circuit breaker has a porcelain post structure, with the upper porcelain insulator serving as the arcing chamber, housing the vacuum arcing chamber. The lower porcelain insulator serves as the support column, and the three-phase porcelain insulators are
installed on a common structural box. The moving end of the arcing chamber is connected to the output shaft of the permanent magnet mechanism through a connecting arm and insulating rod. The permanent magnet mechanism and the connecting rod of the circuit breaker are housed in