Emc Emission; Extra Protection - Danfoss VLT 2800 Quick Manual

Electrical Installation

4.10 EMC Emission

The following system results are achieved on a system consisting of a VLT
armoured control cable, control box with potentiometer, screened/armoured motor cable and screened/armoured brake
cable as well as an LCP2 with cable.
VLT 2803-2875
Set-up
3 x 480 V version with 1A RFI
filter
3 x 480 V version with 1A RFI
filter (R5: For IT mains) 5 m screened/armoured
1 x 200 V version with 1A RFI
filter 1)
3 x 200 V version with 1A RFI
filter (R4: For use with RCD)
3 x 480 V version with 1A+1B
RFI filter
1 x 200 V version with 1A+1B
1)
RFI filter
VLT 2880-2882
Set-up
3 x 480 V version with 1B RFI
filter
Table 4.6 EMC Emission Compliance
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.

4.11 Extra Protection

RCD (Residual Current Device) relays, RCD relays, ELCBs
(Earth Leakage Circuit Breaker), multiple protective
grounding or grounding can be used as extra protection,
provided that local safety regulations are complied with.
3-phase VLT frequency converters require an RCD type B. If
an RFI filter is mounted in the frequency converter, and
either the switch of the RCD or a manually operated switch
is used to connect the frequency converter to the mains
voltage, a time delay of minimum 40 ms is required (RCD
type B).
MG28M202
Quick Guide
Industrial environment
EN 55011 class 1A
Cable-borne Radiated
150 kHz-30 MHz 30 MHz-1 GHz
Yes
25 m screened/ 25 m screened/armoured
armoured
Yes
5 m screened/armoured
Yes
40 m screened/ 40 m screened/armoured
armoured
Yes
20 m screened/ 20 m screened/armoured
armoured
Yes
50 m screened/ 50 m screened/armoured
armoured
Yes
100 m screened/ 100 m screened/
armoured armoured
Industrial environment
EN 55011 class 1A
Cable-borne Radiated
150 kHz-30 MHz 30 MHz-1 GHz
Yes
50 m
Danfoss A/S © Rev. 2014-03-18 All rights reserved.
®
2800 frequency converter with screened/
Emission
Residential, commercial and light industry
Cable-borne
150 kHz-30 MHz
Yes No
Yes No
Yes Yes
15 m screened/armoured
Yes Yes
7 m screened/armoured
Yes Yes
25 m screened/armoured
Yes Yes
40 m screened/armoured
Emission
Residential, commerce and light industry
Cable-borne
150 kHz-30 MHz
Yes Yes
50 m 50 m
If no RFI filter is mounted, or a CI contactor is used for
mains connection, no time delay is required.
Single-phase VLT frequency converters require an RCD type
A. There is no particular need for a time delay whether RFI
filters are mounted or not.
See application note Protection against Electrical Hazards
for further information on ELCBs.
EN 55011 class 1B
Radiated
30 MHz-1 GHz
No
No
No
No
No
No
EN 55011 class 1B
Radiated
30 MHz-1GHz
No
4 4
15