1. Electric key lock: Control the inside controlling line power supply of the switch, when the Electric lock opens, the switch could be operated automatically and remotely,
when the electric lock closed, the switch could be operated by the handle only.

2. Operating handle: When operating the switch by the operating handle, the electric lock must be closed.

3. Mechanic padlock: When inspection, firstly turn the switch to the"0" position by the operation handle, then pull the padlock mechanism and close the padlock, then the inspection can be arranged:(Pull the mechanism padlock will cut off the inside controlling power supply of the switch. The switch couldn't be electric position and also couldn't be in manual operation. 

4. Position indication: It means the position of the switch working estate(I,0, 2)

5. Controlling voltage: AC220V