C unit operation instructionsPower transmission operation:1. Confirm that the ES is at the earthing position;2. Close the cable cabinet door and insert the handle into the ES operation hole and turn it clockwise to the opening position;3. Insert the handle into the SDC hole and turn it clockwise until the SDC is closed.Power outage:1. Insert the handle into the SDC operation hole and rotate it counterclockwise until the SDC opens;2. Confirm that the lights of VPIS is off;3.Insert the handle into the ES operation hole and turn it counterclockwise until the ES is closed;4. Lift the cable cabinet door up and open it outwards.