Harmonics Emission Requirements; Harmonics Test Results (Emission) - Danfoss VLT CDS 803 Manual
Compressor drive
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Also See for VLT CDS 803:
- Programming manual (92 pages) ,
- Design manual (82 pages) ,
- Operating manual (54 pages)
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VLT® Compressor Drive CDS 803
Design Guide
Some of the harmonic currents might disturb communication equipment connected to the same transformer or cause resonance
with power factor correction batteries.
To ensure low harmonic currents, the drive is equipped with DC-link coils as standard. This normally reduces the input current I
by 40%.
The voltage distortion on the mains supply voltage depends on the size of the harmonic currents multiplied by the mains impe-
dance for the frequency in question. The total voltage distortion THDv is calculated based on the individual voltage harmonics us-
ing this formula:
2
2
THD % = U
+ U
+ ... + U
5
7
(U
% of U)
N
6.6.1 Harmonics Emission Requirements
Equipment is connected to the public supply network.
Table 22: Connected Equipment
Options
Definition
1
IEC/EN 61000-3-2 Class A for 3-phase balanced equipment (for professional equipment only up to 1 kW (1.3 hp) total
power).
2
IEC/EN 61000-3-12 Equipment 16–75 A and professional equipment as from 1 kW (1.3 hp) up to 16 A phase current.
6.6.2 Harmonics Test Results (Emission)
Power sizes up to 10 kW (15 hp) [200–240 V AC] comply with IEC/EN 61000-3-12, Table 4. Power sizes up to 30 kW (40 hp) [380–
480 V AC] comply with IEC/EN 61000-3-2 Class A and IEC/EN 61000-3-12, Table 4.
Table 23: Harmonic Current 6.0–10 kW (8.0–15 hp), 200 V
Actual 6.0–10 kW (8.0–15 hp), IP20, 200 V (typical)
Limit for R
≥120
sce
Actual 6.0–10 kW (8.0–15 hp), 200 V (typical)
Limit for R
≥120
sce
Table 24: Harmonic Current 6.0–22 kW (8.0–30 hp), 380–480 V
Actual 6.0–22 kW (8.0–30 hp), IP20, 380–480 V (typical)
Limit for R
≥120
sce
62 | Danfoss A/S © 2021.05
N O T I C E
2
N
Individual harmonic current I
I
I
5
7
32.6
16.6
40
25
Harmonic current distortion factor (%)
THDi
39
48
Individual harmonic current I
I
I
5
7
36.7
20.8
40
25
Harmonic current distortion factor (%)
AJ330233902305en-000201 / 130R0596
Electrical Installation
Considerations
RMS
/I
(%)
n
1
I
I
11
13
8.0
6.0
15
10
PWHD
41.4
46
/I
(%)
n
1
I
I
11
13
7.6
6.4
15
10
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