Siemens 8DA10 Series Installation And Operating Instructions Manual page 80

Installation
Earthing busbars at
the end panel
80/214
Fig. 75: Earthing busbars at the end panel
① Short-circuit bridge at the circuit-breaker housing
②
2x M12 with contact washers, conical spring washers and nuts at the joint
③ Earthing busbar connection to the next panel
Short-circuit bridge at the panel connection housing
If the panel connection housings are delivered separately, the short-circuit bridge ③ must be
mounted on site.
The earthing busbars ② of the switchgear frame are pre-assembled at the factory.
Fig. 76: Mounting the earthing busbar at the panel connection housing
①
Joint of earthing busbar at the switchgear frame
and short-circuit bridge at the panel connection
housing
② Earthing busbar at the switchgear frame
Mount the short-circuit bridge at the panel connection housings as follows:
➭ Fasten the short-circuit bridge ③ at the panel connection housings using 3 hexagon head
bolts M12 ⑤ .
➭ At the joint ① , bolt the short-circuit bridge of the panel connection housings together with
the earthing busbar of the switchgear frame ② . To do this, use a cup head bolt M12 with
contact washer, conical spring washer and nut. Tightening torque: 70 Nm.
Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • 861-9601.9
③
Short-circuit bridge at the panel connection
housing
④ Earthing at the short-circuit bridge of the panel
connection housing (work-in-progress earthing)
⑤ Hexagon head bolts M12 (3x)