Siemens 6SL3845-7NN46-7AA2 - Page 82

Designation Quantity Re‐
quired
Reserve
Conical spring washer
DIN6796-12-FST-ISO12683-ZN1
74 72 2
Hexagon nut
MU-6KT ISO4032-M12-8-A2F
38 36 2
WARNING
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
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
● To mount the spacers on the link rails, use one 70 mm hexagonal bolt ①, two conical spring
washers ② and one nut ③ for each connection point.
● To fasten the link rails to the busbars, use one 45 mm hexagonal bolt ①, two conical spring
washers ② and one nut ③ for each connection point.
● To fasten the link rails to the spacers, use one 70 mm hexagonal bolt ①, two conical spring
washers ② and one nut ③ for each connection point.
Installation
5.8 Connecting the DC bus
SINAMICS SM150 6SL3845-7NN46-7AA2
82 Operating Instructions Rev.201910281345 EXAMPLE