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Installation
5.8 Connecting the DC bus
Designation
Conical spring washer
DIN6796-12-FST-ISO12683-ZN1
Hexagon nut
MU-6KT ISO4032-M12-8-A2F
Arc caused by air gap undershot
If you use bolts with a different length than the provided bolts, the air gap can be undershot.
Undershot air gaps can cause an arc.
This can result in death, serious injury or material damage.
Use only the provided bolts.
Connecting points and screws
● The connection points are located at the top and bottom in the cabinet. The mounting
● To mount the spacers on the link rails, use one 70 mm hexagonal bolt
● To fasten the link rails to the busbars, use one 45 mm hexagonal bolt
● To fasten the link rails to the spacers, use one 70 mm hexagonal bolt
82
WARNING
procedure and the identification of the rails are identical in the upper and lower areas. The
mounting sequence is described using the upper busbars as example.
Figure 5-5
DC-bus connection points
②
washers
and one nut
②
washers
and one nut
②
washers
and one nut
③
for each connection point.
③
for each connection point.
③
for each connection point.
Operating Instructions Rev.201910281345 EXAMPLE
Quantity
Re‐
quired
74
72
38
36
①
, two conical spring
①
, two conical spring
①
, two conical spring
SINAMICS SM150 6SL3845-7NN46-7AA2
Reserve
2
2
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