Product Overview 12KV Vacuum Load Break Switch and AC high-voltage vacuum load switch-fuse combination electrical appliances are designed and developed by our company according to GB3804 and GB16926, which are suitable for AC 50Hz, network rated voltage 40.5kV and designed for a 21kV system of wind turbine and solar power generation. They can be capable of wall-mounted installation in wind turbine towers or as an independent electrical unit in a 40.5kV power system or box-type substations. The product is of a reasonable structure with a simple and reliable switch spring-operated mechanism. 12kV Vacuum Load Break Switch introduction and advantage in application A 12kV vacuum load break switch is a type of switchgear used in medium-voltage electrical systems to control and interrupt the flow of electrical current. It operates at a voltage level of 12 kilovolts (kV) and utilizes a vacuum interrupter as the arc extinguishing medium.