Siemens SINAMICS G120 Operating Instructions Manual page 43

Additional measures
Finely stranded, braided copper cables have to be routed in parallel with the cable shields in
the following cases:
● Old installations with already existing unscreened cables
● Cables with poor high-frequency properties
● Installations with bad grounding systems
The connections in the figure below provide a solid, high-frequency bonding between the
motor housing, the motor terminal box, the gearbox, the driven machine and the EMC
busbar.
Figure 4-7
SINAMICS G120C frequency converter
Operating Instructions, 03/2012, FW V4.5, A5E02999804B AB
Additional high-frequency bonding of the drive system
Installing
4.6 Connecting the converter
41