Siemens SIMATIC MOBY D System Manual page 77

Filtering of the supply voltage
External interference from the mains can be prevented by installing line filters. Correct
installation is extremely important, in addition to appropriate dimensioning. It is essential that
the line filter is mounted directly at the cabinet inlet. As a result, interference is filtered
promptly at the inlet, and is not conducted through the cabinet.
Figure 4-26
MOBY D
System Manual, 01/2010, J31069-D0147-A6-7618
Filtering of the supply voltage
Planning the MOBY D system
4.5 EMC Guidelines
77