Disconnect switch is a switching device used to cut off or isolate power or load in a power system, also called isolator switches. The disconnect switch does not have a special arc extinguishing device and cannot be used to cut off load current or short-circuit current, but it can be used to cut off the power supply for safe maintenance and overhaul. The application scenarios of isolating switches mainly include:
1).Grid connection and disconnection of generator sets.
2). Maintenance and overhaul of substations: When routine maintenance or overhaul is performed at the substation, the disconnect switch can be used to cut off the power supply to ensure the safety of the staff.
3). Isolation of transmission lines: When a transmission line fails or needs to be repaired, the disconnect switch can be used to isolate the faulty section for maintenance.
4). Isolation of loads: When the load is replaced or repaired, the disconnect switch can be used to cut off the power supply to ensure safety.
5). Emergency operation: When an emergency occurs in the power grid, the disconnect switch can be used to quickly cut off the power supply to prevent the accident from expanding.
