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Preparations for use
4.13 Converter operation
● To ensure that high-frequency currents are appropriately discharged, establish a contact
● In the overall system, set up a properly meshed grounding system with low impedance for
● No potential difference between the motor, converter, and working machine.
● Use the common-mode filter (damping cores) at the converter output. The Siemens sales
● Limit the rise in voltage by using output filters. Output filters dampen the harmonic content
● Use the motor reactors.
● Preferably use an IT line supply with an insulated neutral point.
4.13.3
Insulated bearings when operating the converter
If the machine is operated from a low-voltage converter, insulated bearings are fitted at the
NDE and an insulated encoder with insulated bearings (option).
Comply with the plates on the machine relating to bearing insulation and possible bridges.
42
Concentric copper or aluminum shield
through the largest possible surface area at both ends. Establish a 360° contact of the cable
shielding on the motor housing and on the protective grounding bar of the converter. On
the motor end for example, this can be done using EMC screw joints at the cable entry
ports. On the converter end, you can use EMC-shielded clips, for example.
high-frequency currents.
– Use equipotential bonding cables between the terminal box and the‑ high-frequency
grounding point on the motor enclosure.
– Use a separate high-frequency equipotential bonding cable between the motor
enclosure and the protective grounding bar of the converter.
– Use a separate high-frequency equipotential bonding cable between the motor
enclosure and the driven machine.
representative is responsible for selection and dimensioning.
in the output voltage.
Note
Converter documentation
The operating instructions for the converter are not part of this documentation. Refer also
to the configuration/engineering information for the converter.
Steel armor
SIMOTICS HT Series HT-direct 1FW4...1......A
Operating Instructions 11/2018
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