3. For the maximum motor cable length with 4 kHz switching frequency, see page
Maximum recommended motor cable length (page 289)
WARNING!
A drive of category C3 is not intended to be used on a low-voltage public network
which supplies domestic premises. Radio frequency interference is expected if
the drive is used on such a network.
￭ Category C4
The drive complies with the C4 category with these provisions:
1. It is ensured that no excessive emission is propagated to neighboring low-voltage
networks. In some cases, the natural suppression in transformers and cables is
sufficient. If in doubt, the supply transformer with static screening between the
primary and secondary windings can be used.
Equipment6Medium voltage network1
Supply transformer7Neighboring network2
Static screen8Point of measurement3
Drive9Low voltage4
--Equipment (victim)5
2. An EMC plan for preventing disturbances is drawn up for the installation. A template
is available in Technical guide No. 3 EMC compliant installation and configuration
for a power drive system (3AFE61348280 (English)).
3. The motor and control cables are selected, and routed according to the electrical
planning guidelines of the drive. The EMC recommendations are obeyed.
4. The drive is installed according to its installation instructions. The EMC
recommendations are obeyed.
306 Technical data
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