Category C3; Category C4 - ABB ACS180-04S-03A7-1 Hardware Manual

142 Technical data
WARNING!
To prevent radio-frequency interference, do not use a category C2 drive on
a low-voltage public network that supplies domestic premises.
￭

Category C3

This is applicable to drives with an internal EMC C3 filter.
The drive complies with the standard with the following provisions:
1. The motor and control cables are selected as specified in this manual. The EMC
recommendations are obeyed.
2. The maximum motor cable length does not exceed the specified maximum
value. See EMC compatibility and motor cable length (page
3. The drive is installed according to the instructions given in this manual.
WARNING!
Do not install a drive with the internal EMC filter connected to a grounding
system that the EMC filter is not compatible with (for example, an IT system).
The supply network becomes connected to ground potential through the
internal EMC filter capacitors, which can cause danger or damage to the
drive.
WARNING!
To prevent radio-frequency interference, do not use a category C3 drive on
a low-voltage public network that supplies domestic premises.
￭

Category C4

This is applicable to ACS180-04N-...-1/4 and ACS180-04S-...-2 drives.
If the provisions in category 2 or 3 are not 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.
132).