• Use the common-mode lter (damping cores) at the converter output. The SIEMENS sales
partner is responsible for selecting and dimensioning.
• Limit the rise in voltage by using output lters. Output lters 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 conguring 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 tted 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 Driven machine ④ Insulated bearings
② Motor ⑤ Insulated tachometer tting
③ Coupling
Figure4-1 Schematic representation of a single drive
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
installation of an automatic lubrication system or a non-insulated vibration sensor.
• Where necessary, contact the Service Center.
If you connect 2 motors in series in "tandem operation", install an insulated coupling
between the motors.
Preparing for use
4.13Converter operation
1LE5, 1PC4 shaft heights 280 ... 355
Operating Instructions, 11/2022, A5E41454666A 47
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