Siemens SINAMICS G120P - Figure 4-8 Additional High-Frequency Bonding of the Drive System

Connecting
4.9 EMC guidelines
Power Module PM230 IP55
Hardware Installation Manual, 2010-07-02, A5E02923635A AB
55
The shield of the signal cable between the Control Unit and an external controller has to be
connected to the gland plate via an electrically conductive PG gland
⑤ and on the other end
to the shield bonding options of the controller cabinet directly behind the cable entry.
The connection
② provide solid bonding for high-frequency currents between the metal
housing of the inverter and the PE busbar. This connection should be made with short, finely
stranded, braided copper wires with a large cross-section (≥ 95 mm²).
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 driven machine and the EMC busbar of the
inverter.
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Figure 4-8 Additional high-frequency bonding of the drive system