A disconnector is a type of switch device mainly used for "isolating power sources, switching operations, and connecting and disconnecting small current circuits", and it has no arc-extinguishing function. When the disconnector is in the open position, there is an insulation distance between the contacts that meets the specified requirements and a clear disconnection mark. Switchgear that can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuits) within a specified time when in the closed position. It is generally used as a high-voltage disconnector, that is, a disconnector with a rated voltage above 1kV. Its working principle and structure are relatively simple, but due to its large usage and high requirements for working reliability, it has a significant impact on the design, construction and safe operation of substations and power plants. The main feature of a disconnector is that it has no arc-extinguishing capability and can only open and close circuits when there is no load current. The entry introduces the functions, features, types, applications, anti-misoperation improvements, maintenance, and common problems of disconnectors.
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