Connecting Dc Busbars To The Power Unit - Siemens SINAMICS S120 Equipment Manual

4.5.2.3

Connecting DC busbars to the power unit

The components required for connecting the DC busbars to the power unit are included as
standard parts. If any components are replaced, you may have to carry out the following
steps to restore the connections.
Preparatory steps
● Install and secure the cabinet units properly.
● Disconnect the cabinet units from the power supply.
● Disconnect the DC busbars from the power supply.
● Observe the "five safety rules".
● Allow unimpeded access to the DC busbars
Establishing the connection (using the example of a Motor Module)
1. Establish a connection from the "DC P" connection on the Motor Module to the upper DC
2. Establish a connection from the "DC N" connection on the Motor Module to the lower DC
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A
(if necessary, remove the protective covers).
Figure 4-8 Connecting the DC busbar, using the example of a Motor Module
busbar (1) (1 x M12 screw + nut + washer; torque: 50 Nm).
busbar (2) (1 x M12 screw + nut + washer; torque: 50 Nm).
WARNING
The use of cables for these connections is not permitted!
CAUTION
Make sure that you do not drop any nuts, washers, or screws as this could cause
damage.
Electrical installation
4.5 Connections
1
2
63