2. The motor and control cables are selected as specified in this manual.
3. The drive is installed according to the instructions given in this manual.
4. For the maximum motor cable length with 4 kHz switching frequency, see
section Maximum recommended motor cable length (page 154).
WARNING!
The drive may cause radio interference if used in residential or domestic
environment. The user is required to take measures to prevent interference,
in association to the requirements for the CE compliance listed above, if
necessary.
Note:
• Do not install a drive with the internal EMC filter connected on IT (ungrounded).
The supply network becomes connected to ground potential through the
internal EMC filter capacitors which may cause danger or damage to the drive.
For disconnecting the EMC filter see section Frames R0…R3 (page 87).
• Do not install a drive with internal EMC filter connected on corner-grounded
TN systems; otherwise the drive will be damaged. For disconnecting the internal
EMC filter see section Frames R0…R3 (page 87).
￭
Category C3
The drive complies with the standard with the following provisions:
1. The motor and control cables are selected as specified in this manual.
2. The drive is installed according to the instructions given in this manual.
3. For the maximum motor cable length with 4 kHz switching frequency, see
section Maximum recommended motor cable length (page 154).
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
If the provisions under Category C3 cannot be met, the requirements of the
standard can be met as follows:
1. It is ensured that no excessive emission is propagated to neighboring
low-voltage networks. In some cases, the inherent 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.
Technical data 169
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