Siemens SINAMICS S120 Manual page 672

Cabinet design and EMC Booksize
12.4 Arrangement of components and equipment
To calculate the load of the DC link busbar, add the DC link currents I
Motor Modules. If the current carrying capacity of the DC link busbars is exceeded for the
planned configuration, two solutions are possible:
● Center infeed: Arrangement of the drive line-up with infeed to the left and right (example
2)
● Use of another Line Module
Note
The following examples are based on the simultaneous use and loading of the Motor
Modules with the rated current I
technical data of the Motor Modules in the Power Units Booksize Manual.
Example 1:
Connection of several Motor Modules with different current carrying capacity of the DC link
busbar to a Line Module.
①
DC link busbar current carrying capacity
②
DC link busbar load: DC link current I
③
Increased load of the DC link busbar
④
Motor current = rated output current I
Figure 12-2 Regular arrangement with infeed to the right of the DC link, DC link busbar not overloaded
672
. The values of the DC link current were taken from the
n
at the rated current I of the Motor Module
d n
of the Motor Module
n
of the connected
d
Booksize Power Units
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8