DISCONNECT Switches

Disconnect Switch (Isolator Switch): Power System Safety Guardian

A disconnect switch is a critical safety device in power systems, designed to physically isolate circuits by creating a visible air gap. Unlike circuit breakers, it lacks arc-extinguishing capability and cannot interrupt load current or short-circuit current. However, its robust design ensures 100% reliable isolation for maintenance safety, complying with IEC 60947-3 standards.

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.