Insulated Bearings For Converter Operation - Siemens SIMOTICS DP Operating Instructions Manual

Preparing for use
4.13 Converter operation
• 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. Output filters dampen the harmonic content
in the output voltage.
• Use the motor reactors.
• Preferably use an IT line supply with an insulated neutral point.
The operating instructions for the converter are not part of this documentation. Carefully
comply with the instructions in the converter configuring information.
4.13.4

Insulated bearings for converter operation

If the machine is controlled from a low-voltage converter, depending on the machine type, an
insulated bearing can be fitted at the NDE.
An insulated speed encoder can be optionally mounted.
Comply with the information provided on the machine plates relating to bearing insulation and
possible jumpers.
①
②
③
Figure 4-2
NOTICE
Bearing damage
The bearing insulation must not be bridged. Bearing currents can damage bearings.
• Do not bridge the bearing insulation for subsequent installation work, such as the
• Where necessary, contact the Service Center.
If you connect 2 motors in series in "tandem operation", install an insulated coupling between
the motors.
44
Driven machine
Motor
Coupling
Schematic representation of a single drive
installation of an automatic lubrication system or a non-insulated vibration sensor.
④
Insulated bearings
⑤
Insulated tachometer fitting
Operating Instructions, 02/2022, A5E51698698A
1FZ shaft height 280