Siemens 8DA10 Series Installation And Operating Instructions Manual page 83

861-9601.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • Revision 11
Mounting the short-circuit bridge on the bus sectionalizer
In the case of the bus sectionalizer, the short-circuit bridge ① must be mounted on site.
Fig. 81: Fixing points at the short-circuit bridge
The earthing busbars of the switchgear frame are pre-assembled at the factory.
Mount the short-circuit bridge at the bus sectionalizer housings as follows:
➭ Fasten the short-circuit bridge at the bus sectionalizer housings using 3 hexagon head
bolts M12.
Fig. 82: Short-circuit bridge (side view of the switchgear)
➭ At the joint ① , bolt the short-circuit bridge of the bus sectionalizer 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.
Fig. 83: Short-circuit bridge
(rear view of the switchgear)
➭ Repeat the assembly operations for the short-circuit bridges at the bus sectionalizer
housings until all bar ends of the switchgear are interconnected.
① Hexagon head bolt M12
with plain washer (3x)
② Short-circuit bridge
①
Cup head bolt M12 with contact
washer, conical spring washer and nut.
② Earthing busbar
③ Short-circuit bridge
Installation
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