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
(internal
)
Supply voltage/Rated power Class A2/EN 55011 Class A1/EN 55011 Class B/EN 55011
3x380–480 V 3x200–240 V 1x200–240 V Conducted Radiated Conducted Radiated Conducted Radiated
A2 lter
0.37–22 kW
(0.5–30 hp)
– –
Minimum 25 m
(82 ft)
Yes
1)
– – – –
–
0.37–4 kW
(0.5–5.4 hp)
–
Minimum 25 m
(82 ft)
Yes
1)
– – – –
– –
0.37–2.2 kW
(0.5–3 hp)
– – – – – –
A1 lter
0.37–7.5 kW
(0.5–10 hp)
– –
Minimum 25 m
(82 ft)
Yes
1)
25 m
(82 ft)
Yes – –
11–22 kW
(15–30 hp)
– –
Minimum 50 m
(164 ft)
Yes
1)
50 m
(164 ft)
Yes – –
– –
0.37–2.2 kW
(0.5–3 hp)
Minimum 40 m
(131 ft)
Yes
1)
40 m
(131 ft)
Yes
15 m
(49.2 ft)
–
A2 lter
EMC
screw
removed
2)
0.37–22 kW
(0.5–30 hp)
– – – – – – – –
–
0.37–4 kW
(0.5–5.4 hp)
– – – – – – –
– –
0.37–2.2 kW
(0.5–3 hp)
– – – – – –
A1 lter
EMC
screw
removed
2)
0.37–7.5 kW
(0.5–10 hp)
– –
Minimum 5 m
(16.4 ft)
Yes
1)
– – – –
11–22 kW
(15–30 hp)
– –
Minimum 5 m
(16.4 ft)
Yes
1)
– – – –
– –
0.37–2.2 kW
(0.5–3 hp)
Minimum 5 m
(16.4 ft)
Yes
1)
– – – –
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.
Product Overview Design Guide
MG07B102 Danfoss A/S © 03/2016 All rights reserved. 37
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