Siemens SINAMICS S120 Manual page 80

Electrical installation
4.5 Connections
3. Withdraw jumper
of the second cabinet up to its end stop
4. Re-tighten the nuts on the DC busbars in both cabinet units (torque: 50 Nm).
5. Repeat steps 1 to 4 for the lower DC busbar (DC N).
Note
Mounting specifications
The screws must only be loosened rather than removed because otherwise the nuts could
fall into the device.
The torque (50 Nm) must be observed to avoid excessive heating of the terminal contacts
during operation!
For the busbar systems, all jumpers of the DC busbar must always be connected!
For each cabinet row installed, you must mount one side panel on the right (option M26) and
one on the left (option M27)!
Before mounting the side panels on an installed cabinet row, you must remove any jumpers
present in the DC busbars of the cabinet on the right!
Note
DC busbars for the transport units
In the case of transport units with standard integrated DC busbars within the cabinet group,
you only need to connect the ends of the busbars of the transport units.
80
①
of the DC busbar from the first cabinet and insert into the DC busbar
NOTICE
Material damage due to incorrect connection of the jumpers for the DC busbar
Incorrect connection of the jumpers for the DC busbar can heat up the busbars and
therefore cause material damage.
①
• Insert the jumper
②
washers rest fully on the jumper.
②
.
of the first cabinet into the cabinet to be connected until the
Cabinet Modules liquid cooled
Manual, 10/2015, A5E37067587A