Emc Emission Requirements - Danfoss VLT Midi Drive FC 280 Design Manual

Product Overview
When using unshielded cables, some emission requirements are not complied with, although the immunity requirements are
observed.
To reduce the interference level from the entire system (unit and installation), make motor and brake cables as short as
possible. Avoid placing cables with a sensitive signal level alongside mains, motor, and brake cables. Radio interference
higher than 50 MHz (airborne) is especially generated by the control electronics.

2.6.2 EMC Emission Requirements

The test results in Table 2.12 have been obtained using a system with a frequency converter (with the mounting plate), a
motor, and shielded motor cables.
Filter
type
Supply voltage/Rated power
(internal
)
3x380–480 V 3x200–240 V 1x200–240 V
0.37–22 kW
(0.5–30 hp)
0.37–4 kW
A2 filter –
(0.5–5.4 hp)
–
0.37–7.5 kW
(0.5–10 hp)
11–22 kW
A1 filter
(15–30 hp)
–
0.37–22 kW
A2 filter
(0.5–30 hp)
EMC
0.37–4 kW
screw
–
(0.5–5.4 hp)
removed
2)
–
0.37–7.5 kW
A1 filter
(0.5–10 hp)
EMC
11–22 kW
screw
(15–30 hp)
removed
2)
–
Table 2.12 EMC Emission Requirements
1) Frequency range from 150 kHz to 30 MHz is not harmonized between IEC/EN 61800-3 and EN 55011 and not mandatorily included.
2) Low earth leakage current. Compatible to run on ELCB/IT mains.
MG07B102
Design Guide
Class A2/EN 55011
Conducted
Minimum 25 m
– –
(82 ft)
Minimum 25 m
–
(82 ft)
0.37–2.2 kW
– –
(0.5–3 hp)
Minimum 25 m
– –
(82 ft)
Minimum 50 m
– –
(164 ft)
0.37–2.2 kW Minimum 40 m
–
(0.5–3 hp) (131 ft)
– – –
– –
0.37–2.2 kW
– –
(0.5–3 hp)
Minimum 5 m
– –
(16.4 ft)
Minimum 5 m
– –
(16.4 ft)
0.37–2.2 kW Minimum 5 m
–
(0.5–3 hp) (16.4 ft)
Danfoss A/S © 03/2016 All rights reserved.
Class A1/EN 55011
Radiated Conducted Radiated
1) – –
Yes
1) – –
Yes
– – –
25 m
1) Yes
Yes
(82 ft)
50 m
Yes 1) Yes
(164 ft)
40 m
1) Yes
Yes
(131 ft)
– – –
– – –
– – –
Yes 1) – –
1) – –
Yes
Yes 1) – –
2
Class B/EN 55011
Conducted Radiated
– –
– –
– –
– –
– –
15 m
–
(49.2 ft)
– –
– –
– –
– –
– –
– –
37
2