4.7.2
Converter input voltage
The insulation system of SIMOTICS machines always complies with the requirements of stress
category C (IVIC C = high stress). If voltage peaks higher than those specified according to
IVIC C can occur, then please contact your Siemens partner:
● For a line supply voltage (converter input voltage) up to max. 480 V, and when controlled
from a SINAMICS G/SINAMICS S converter with uncontrolled/controlled infeed: Comply
with the guidelines for configuring motor and converter.
● For line voltages (converter input voltages) higher than 480 V, motors, which are ordered for
converter operation, have an appropriate insulation system.
● Operation with a converter from another manufacturer: Comply with the permissible voltage
peaks according to IEC 60034-18-41 in accordance with stress category C, dependent on
the particular line voltage (converter input voltage) and the motor insulation system.
NOTICE
Material damage caused by an excessively high supply voltage
The insulation system will be damaged if the supply voltage is too high for the insulation
system. This can completely destroy the machine.
● Comply with the peak voltages as laid down in the guidelines above.
See also
http://w3app.siemens.com/mcms/infocenter/content/en/Pages/
4.7.3
Reducing bearing currents during operation with converter (low voltage)
Taking the following actions will reduce the bearing currents:
● Ensure that the contacts are made over a large area. Solid copper cables are not suitable
for high-frequency grounding because of the skin effect.
Equipotential bonding conductors:
Use equipotential bonding conductors:
● between motor and driven machine
● between motor and converter
● between the terminal box and the RF grounding point at the motor enclosure.
Preparing for use
4.7 Converter operation
1PC134, 1PC136 crane motors SH 132 ... 315
34
Operating Instructions, 02/2019, A5E43212221A
