A switch disconnector is an electrical device used to disconnect a circuit and isolate the power supply. It is a switching device that safely interrupts current flow and provides electrical isolation. Unlike ordinary switches, switching isolators generally have higher breaking capacity and breaking ability.

Switch disconnectors are commonly used in power systems, industrial equipment and distribution installations. It can be used as a main circuit breaker to cut off power to an entire circuit for maintenance, overhaul, or safe operation in emergencies. Switch isolators are commonly used in distribution cabinets, power stations, substations and various electrical control systems. Their function is to ensure circuit isolation and safe operation.