Assembly of the Earth Bus

Earth bars are screw-fastened between the switchgear panels using connecting bars (Figure 40).

CAUTION
hazard of incorrect assembly Comply with the specifications on treatment of contact surfaces and the tightening torques for busbar Screw Fastenings in the Annexure. Comply with the country specific standards referring to earthing systems. Failure to follow these instructions can result in injury or equipment damage.

Follow the below steps for assembly of the earth bus:

1. Clean all contact areas of the connecting bar and the appropriate earth bar in the switchgear panels and coat them with lubricant KL.

2. Slip the connecting bar (Figure 40, 1) into the adjacent panel (3) through the cutout in the panel-supporting structure (2).

3. Screw-fasten (5) connecting bar on both sides to the earth bar (4) in question.

   

   Figure 40
   Mounting the Earth Bar

   1	Connecting bar	4	Earthing bars in the panels
   2	Cutout in panel-supporting structure	5	Screw fastening of connecting bar to earthing bars
   3	Adjacent panel

4. Connect earth bus (Figure 41) to the earthing system of the switchgear building (connecting lines and screw accessories are not included in the scope of supplies).

   

   Figure 41
   Connecting Point of Switchgear Earth Bus to Building Earth