An isolating switch is a switch device primarily used for "isolating power, switching operations, and connecting or disconnecting low current circuits" without arc-suppression capabilities. When in the open position, the switch has an insulating distance between contacts that meets regulatory requirements and clear breakage indicators; when in the closed position, it can carry the current under normal circuit conditions and under abnormal conditions (such as a short circuit) within specified time frames. Generally used as a high-voltage isolating switch, which is an isolating switch with a rated voltage above 1kV. Although its working principle and structure are relatively simple, its large usage volume and high reliability requirements have a significant impact on the design, establishment, and safe operation of substation and power plant facilities. The main characteristic of an isolating switch is its lack of arc-suppression ability, allowing it to open or close circuits only when no load current is present. The entry describes the functions, features, types, applications, anti-misoperation improvements, maintenance, and common issues of isolating switches.