Siemens SIMATIC S5 1P 243, Operating Instructions & Installation Instructions

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Concentric copper or aluminum shield Steel armor
Measures to further reduce bearing currents
To specifically reduce and prevent damage caused by bearing currents, you must consider
the system as a whole, which comprises the motor, converter, and driven machine. The
following precautions help to reduce bearing currents:
● In the overall system, set up a properly meshed grounding system with low impedance for
high-frequency currents.
● Use the common-mode filter (damping cores) at the converter output. The Siemens sales
representative is responsible for selection and dimensioning.
● Limit the rise in voltage by using output filters. This dampens the harmonic content in the
output voltage.
Note
Converter documentation
The operating instructions for the converter are not part of this documentation. Refer also
to the configuration information for the converter.
4.11.2 Insulated bearings when operating the converter
Depending on the machine's size and design, an insulated bearing and an insulated
tachometer can be fitted at the non-drive end.
Comply with the plates on the machine relating to bearing insulation and possible bridges.
①
Driving machine
④
Insulated bearings
②
Motor
⑤
Insulated tachometer fitting
③
Coupling
Figure 4-1 Schematic representation of a single drive
Preparations for use
4.11 Converter operation
LOHER CHEMSTAR 1PS5
Operating Instructions 03/2014
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