With the earthing switch closed, insertion of the withdrawable part towards the service position must be blocked after only two clockwise turns of the crank.
如果接地开关处于合闸状态,手车向工作位置的操作必须被机械联锁锁定。
Electrical connections between the withdrawable part and the fixed part of the panel are performed with flexible wires located in a metal tube and a64-pole low-voltage plug connector.