Eaton PowerXL DA1 - 2.7 Motor chokes

2 Engineering
2.5 Radio interference suppression filter
48 DA1 Variable Frequency Drives 11/16 MN04020005Z-EN www.eaton.com
2.5 Radio interference suppression filter
DA1-12…FB-…, DA1-32…FB-…, and DA1-34…FB-… variable frequency
drives feature an internal radio interference suppression filter. In combination
with a motor cable that is earthed and screened 360° on both ends, they
make it possible to comply with the sensitive EMC limits of category C1 in
the 1st environment (IEC/EN 61800-3) when there is conducted interference.
This requires installation in accordance with EMC requirements, as well as
not exceeding permissible motor cable lengths.
The standard motor cable lengths are as follows:
• 1 m for category C1 in the 1st environment
• 5 m for category C2 in the 1st and 2nd environments
• 25 m for category C3 in the 2nd environment
Longer motor cable lengths can be used if additional, external radio
interference suppression filters (DX-EMC…) are used. For more information,
please refer to the following tables.
Additional measures used to reduce EMC limits and use longer motor cable
lengths are possible in combination with motor chokes and sine filters.
DA1-35…NB-… devices do not feature an internal radio interference
suppression filter. DX-EMC34… radio interference suppression filters can be
connected upstream in order to run these devices on a three-phase mains
voltage of 500 V.
Please enquire for radio interference suppression filters for higher mains
voltages.
￫
In the case of power drive systems (PDS) with variable
frequency drives, electromagnetic compatibility (EMC)
measures must already be taken into account during the
engineering stage, as making changes during assembly and
installation and retroactively fixing things will be more
expensive.
￫
The maximum unscreened cable length between the radio
interference suppression filter and the variable frequency drive
should not exceed 300 to 500 mm (depending on the DA1
variable frequency drive’s frame size).
￫
For the rated radio interference suppression filters for DA1 variable
frequency drives, please refer to the technical data chapter in
 Section 6.8, „Radio interference suppression filter“, page 176.