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Appendix B Accessories|VFD-S Series
Revision August 2006, SE08, SW V2.61 B-3
B.2 EMI Filters
The DELTA VFD-S Series 0.25-3HP, 115V, 230V, 460V AC drive uses DELTA EMI Filter. Use the
table below to find the appropriate filter for your DELTA VFD-S drive.
Model of AC Motor Drive EMI Filter
VFD002S21A/B, VFD004S21A/B, VFD007S21A/B RF007S21AA
VFD015S21D/U, VFD022S21D/U RF022S21BA
VFD004S43A/B, VFD007S43A/B RF007S43AA
VFD002S11A/B, VFD004S11A/B 12DKT1W3S
VFD002S23A, VFD004S23A, VFD007S23A 08TDT1W4S
VFD007S11A/B 22DRT1W3S
Installation
All electrical equipment, including AC motor drives, will generate high-frequency/low-frequency noise
and will interfere with peripheral equipment by radiation or conduction when in operation. By using
an EMI filter with correct installation, much interference can be eliminated. It is recommended to use
DELTA EMI filter to have the best interference elimination performance.
We assure that it can comply with following rules when AC motor drive and EMI filter are installed
and wired according to user manual:
EN61000-6-4
EN61800-3: 1996 + A11: 2000
EN55011 (1991) Class A Group 1 (1
st
Environment, restricted distribution)
General precaution
1. EMI filter and AC motor drive should be installed on the same metal plate.
2. Please install AC motor drive on footprint EMI filter or install EMI filter as close as possible
to the AC motor drive.
3. Please wire as short as possible.
4. Metal plate should be grounded.
5. The cover of EMI filter and AC motor drive or grounding should be fixed on the metal plate
and the contact area should be as large as possible.
Choose suitable motor cable and precautions
Improper installation and choice of motor cable will affect the performance of EMI filter. Be sure to
observe the following precautions when selecting motor cable.