Equipotential Bonding G120D-2 - Siemens SINAMICS G120D Getting Started Manual

3.5.3

Equipotential bonding G120D-2

Equipotential bonding within the drive system has to be established by connecting all
electrical and mechanical drive components (transformer, motor and driven machine) to the
grounding system. These connections are established by means of standard heavy-power
PE cables, which do not need to have any special high-frequency properties. In addition to
these connections, the inverter (as the source of the high-frequency interference) and all
other components in each drive system (motor and driven machine) must be interconnected
with respect to the high-frequency point of view. For this purpose cables with good high-
frequency properties must be used.
Grounding and high-frequency equipotential bonding measures
The following figure illustrates all grounding and high-frequency equipotential bonding
measures using an example with the SINAMICS G120D-2.
Figure 3-5
The ground connections
components. They are made with standard, heavy-power PE conductors without special
high-frequency properties and ensure low frequency equipotential bonding as well as
protection against injury.
Getting Started
Getting Started, FW V4.5, A5E03404762A AB
Grounding and high-frequency equipotential bonding measures in the drive system and
in the plant
①
represent the conventional grounding system for the drive
Installation
3.5 EMC installation guidelines
23