The static contact of earthing switch is fixed on the conductive pipe of disconnector. The dynastic contact is installed on the end of earthing knife in the base.
接地开关静触头固定在隔离开关的导电管上，动触头安装在底座上的接地闸刀钢管的端部。
2
It indicates that the rotary-arc gap switch employing a sharp knife-edge electrode as a third trigger electrode can distinctly reduce the electrode erosion and prolong the lifetime of the switch.