APX A Optional Accessories | VFD-VJ
Apx A-18
EMI Filter Installation
All electrical equipment, including hybrid 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 hybrid drive and EMI filter are installed and wired
according to user manual:
EN61000-6-4
EN61800-3: 1996
EN55011 (1991) Class A Group 1 (1
st
Environment, restricted distribution)
General precaution
1. EMI filter and hybrid drive should be installed on the same metal plate.
2. Please install hybrid drive on footprint EMI filter or install EMI filter as close as possible to the hybrid
drive.
3. Please wire as short as possible.
4. Metal plate should be grounded.
5. The cover of EMI filter and hybrid 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.
1. Use the cable with shielding (double shielding is the best).
2. The shielding on both ends of the motor cable should be grounded with the minimum length and
maximum contact area.
3. Remove any paint on metal saddle for good ground contact with the plate and shielding.
Remove any paint on metal saddle for good ground contact with
the plate and shielding.
saddle
the plate with grounding
Figure 1
Saddle on both ends
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