Siemens SINAMICS G120D Original Instructions Manual page 53

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Figure 4-17
For general rules for EMC compliant installation see also: EMC design guidelines
(http://support.automation.siemens.com/WW/view/en/60612658/0/en)
Converter with control units CU250D-2
Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
Transformer
Second level distribution with PE equipotential bonding
Metal frame
Short connection from the PE terminal to the metal frame.
Electrical connection of motor cable shield and connector body.
Electrical connection of motor cable shield and motor terminal box via electrically conductive PG
gland.
Driven machine
Conventional grounding system.
Standard, heavy-power PE conductors without special high-frequency properties.
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Ensures low frequency equipotential bonding as well as protection against injury.
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Foundation ground
Grounding and high-frequency equipotential bonding measures in the drive system and
in the plant
Installation
4.2 Electrical Installation
53