Connect all earthing systems to ensure the lowest possible conductor impedance. The lowest
possible conductor impedance is achieved by keeping the conductor as short as possible and by
grounding with the greatest possible surface area. If multiple drives are installed in a cabinet, the
cabinet backplate, which must be made of metal, should be used as a joint earth reference plate.
The drives must be fitted to the backplate at the lowest possible impedance.
To achieve low impedance, connect the drive to the backplate with the drive fastening bolts. The
backplate must be completely free from paint.
1.4.10 EMC emission
The following system results are achieved on a system consisting of a VLT Series 2800 with
screened/armoured control cable, control box with potentiometer, screened/armoured motor ca-
ble and screened/armoured brake cable as well as an LCP2 with cable.
VLT 2803-2875
Emission
Industrial environment
Residential, commercial and light indus-
try
EN 55011 class 1A
EN 55011 class 1B
Setup
Cable-borne
150 kHz- 30 MHz
Radiated
30 MHz - 1 GHz
Cable-borne
150 kHz - 30 MHz
Radiated
30 MHz - 1 GHz
3 x 480 V version with
1A RFI filter
Yes
25 m screened/
armoured
Yes
25 m screened/
armoured
No
No
3 x 480 V version with
1A RFI filter (R5: For
IT mains)
Yes
5 m screened/
armoured
Yes
5 m screened/arm-
oured
No
No
1 x 200 V version with
1A RFI filter
1.
Yes
40 m screened/
armoured
Yes
40 m screened/
armoured
Yes
15 m screened/
armoured
No
3 x 200 V version with
1A RFI filter (R4: For
use with RCD)
Yes
20 m screened/
armoured
Yes
20 m screened/
armoured
Yes
7 m screened/arm-
oured
No
3 x 480 V version with
1A+1B RFI filter
Yes
50 m screened/
armoured
Yes
50 m screened/
armoured
Yes
25 m screened/
armoured
No
1 x 200 V version with
1A+1B RFI filter
1.
Yes
100 m screened/
armoured
Yes
100 m screened/
armoured
Yes
40 m screened/
armoured
No
VLT 2880-2882
Emission
Industrial environment
Residential, commerce and light industry
EN 55011 class 1A
EN 55011 class 1B
Setup
Cable-borne
150 kHz- 30 MHz
Radiated
30 MHz - 1 GHz
Cable-borne
150 kHz - 30 MHz
Radiated
30 MHz - 1 GHz
3 x 480 V version with
1B RFI filter
Yes
50 m
Yes
50 m
Yes
50 m
No
1.
For VLT 2822-2840 3 x 200-240 V the same values apply as for the 480 V version with
1A RFI filter.
•
EN 55011: Emission
Limits and methods of measurement of radio disturbance characteristics of industrial,
scientific and medical (ISM) high-frequency equipment.
Class 1A:
Equipment used in an industrial environment.
Class 1B:
Equipment used in areas with a public supply network (residential, commerce and light industry).
VLT 2800 Quick Guide
1 Quick Guide
1
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