Overview

ZW7A-40.5 Series Outdoor High-Voltage AC Vacuum Circuit Breakers (hereinafter referred to as the "circuit breaker") are outdoor high-voltage electrical equipment with three-phase AC 50Hz and rated voltage of 40.5KV. They are equipped with spring or electromagnetic actuation mechanisms. They can be remotely controlled for opening and closing operations, and can also be manually energized, opened, and closed locally. The design performance meets the requirements of the GB81984-89 "AC High-Voltage Circuit Breaker" National Standard. The overall structure consists of an insulator column, with the upper insulator housing a vacuum arc chamber, and the lower insulator serving as the supporting insulator. They are suitable for frequently operated environments and offer advantages such as good sealing, resistance to aging, high voltage resistance, non-flammability, no explosion, long service life, and easy installation and maintenance. Mainly used for control and protection of outdoor 35KV transmission and transformation systems, they can also be applied for normal operation and short-circuit protection in urban, rural power grids, and industrial and mining enterprises.