Siemens SIMOTICS A 1FU8, Operating Instructions Manual

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Preparing for use
4.7 Converter operation
1FU8
34
Operating Instructions, 02/2016, 5 610 70000 02 000
4.7 Converter operation
4.7.1 Parameterizing the converter
● If the design of the motor requires connection to a particular converter type, the rating
plate will contain corresponding additional information.
● Correctly parameterize the converter. Parameterizing data can be taken from the
machine rating plate (not the supplementary rating plate with the operating data when
connected to a converter).
You can find parameter data in the:
–
Operating instructions for the converter.
– SINAMICS Configuration Manuals.
● Do not exceed the specified maximum speed limit n
max
. You can either find this on the
rating plate n
max
, on the supplementary plate for converter operation as the highest
speed, or in the type-specific catalog.
● Operate the machine only for a short period at the maximum speed. Operating the
machine for an extended period at the maximum speed may cause vibrations with an
increased frequency and consequently higher noise levels.
● Check that the machine is cooled sufficiently for commissioning purposes.
4.7.2 Reducing bearing currents during operation with converter (low voltage)
Taking the following actions will reduce the bearing currents:
● Ensure that the contacts are established 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.
Selecting and connecting the cable:
As far as possible, use symmetrically arranged, shielded connection cables. The cable
shielding, made up of as many strands as possible, must have good electrical conductivity.
Braided shields made of copper or aluminum are very suitable.
● The shield is connected at both ends, at the motor and converter.