Switch is a manually operated device with safety interlocking keys, designed to ground electrical circuit on both side of AC Vacuum Circuit Breaker when the AC Vacuum Circuit Breaker is open.
Ensures the safety of the maintenance personnel during maintenance and routine checking.
Relay is the core of module, equivalent to a solenoid-controlled switch, 12V power supply terminal controls the switching of the relay.
12V power supply, contact close, strong electrical circuit on, device starts to work.
Disconnect 12V, contacts disconnected, strong electric circuit off, the device stops working.