Chapter 3 Electrical Wiring｜VP3000
140
3-9-4-1 External Filter
Install the drive and filter on a metal plate such as a grounded control cabinet. Use shielded wires
for motor cables and keep the wiring distance as short as possible. Generally, the drive provides
the corresponding type of filter, because only the filter that has been tested and certified can pass
the EMC standard.
EMC Filter Installation
Foreword
All electrical equipment, including AC motor drives, generate high frequency / low frequency noise
and interfere with peripheral equipment by radiation or conduction when in operation. You can
eliminate most of the interference by install an EMC filter correctly. It is recommended to use
DELTA EMC filter to have the best interference elimination performance.
We assure that it can comply with following rules when AC motor drive and EMC filter are installed
and wired according to user manual:
1. EN61000-6-4
2. EN61800-3 1996
3. EN55011 (1991) Class A Group 1
General Precautions
To ensure EMC filter can maximize the effect of suppressing the interference of AC motor drive,
the installation and wiring of AC motor drive should follow the user manual. In addition, be sure to
observe the following precautions:
1. Install the EMC filter and AC motor drive on the same metal plate.
2. Install the AC motor drive on footprint EMC filter or install the EMC filter as close as possible
to the AC motor drive.
3. Wire as short as possible.
4. Ground the metal plate.
5. The cover of EMC 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 affect the performance of EMC filter. Be sure to
follow the precautions below when selecting motor cable.
1. Use the cable with shielding (double shielding is the best). The shielding on both ends of the
motor cable should be grounded with the minimum length and maximum contact area.
2. Remove any paint on metal saddle for good ground contact with the saddle and the metal
plate, as shown in Figure 3-93.
3. The connection between the motor cable isolated copper mesh and the metal plate must be
correct. The isolated copper mesh at both ends of the motor cable should be fixed to the
metal plate with a saddle. Refer to Figure 3-94 fro correct connecting method.
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