Rockwell Automation 1305 AC Drive, Series A and B, Firmware 4.xx-5.xx - Manual (Page 24)

Chapter 2 – Installation/Wiring
2-8
RFI FILTERING
1305 drives can be installed with an RFI filter, which controls
radio–frequency conducted emissions into the main supply
lines and ground wiring.
If the cabling and installation recommendation precautions
described in this manual are adhered to, it is unlikely that
interference problems will occur when the drive is used with
conventional industrial electronic circuits and systems.
However, a filter is recommended if there is a likelihood of
sensitive devices or circuits being installed on the same AC
supply or if the motor cable exceeds 75 meters (250 feet).
Beyond this length, capacitance to ground will increase the
supply emissions.
Where it is essential that very low emission levels must be
achieved or if conformity with standards is required the
optional RFI filter should be used. Refer to Appendix D and
instructions included with the filter for installation and
grounding information.
RFI Filter Leakage Current
The optional RFI filter may cause ground leakage currents.
Therefore a solid ground connection must be provided.
ATTENTION: To guard against possible
equipment damage, RFI filters can only be used
with AC supplies that are nominally balanced
with respect to ground. In some installations,
three–phase supplies are occasionally connected
in a 3-wire configuration with one phase
grounded (Grounded Delta). The filter must not
be used in Grounded Delta supplies.
CE Conformity
Refer to Appendix D.