Siemens SINAMICS S120 Manual page 82

Electrical installation
4.6 Connections
Establishing the connection
1. Loosen the 2 x M12 nuts on the upper DC busbar (DC P) on the right side
2. Loosen the 2 x M12 nuts on the DC busbar on the left side of the cabinet to be
3. Withdraw jumper
4. Re-tighten the nuts on the DC busbar in both cabinet units (torque: 50 Nm)
5. Repeat steps 1 to 4 for the lower DC busbar (DC N).
NOTICE
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
cabinet.
connected.
①
of the DC busbar from the first cabinet and insert into the DC busbar
of the second cabinet up to its end stop
NOTICE
Push in jumper for the DC busbar sufficiently far
①
Jumper of the first cabinet must be inserted into the cabinet to be connected until the
②
washers are completely located on the jumper.
②
.
①
at the first
Cabinet Modules
Manual, 03/2013, A5E03263538A