when dealing with harmonic limits containing low harmonic numbers, the IEEE 519 limits are lower than the 61000-2-4
limits. Low harmonic drives observe the total harmonic distortion as defined in IEEE 519 for all R
sce
. Each individual
harmonic current fulfills table 10–3 in IEEE 519 for R
sce
≥20.
I
SC
/I
L
(R
SCE
)
h<11
11≤h<17
17≤h<23
23≤h<35
35≤h
Total demand
distortion TDD
<20
4%
2.0%
1.5%
0.6%
0.3%
5%
20<50
7%
3.5%
2.5%
1.0%
0.5%
8%
50<100
10%
4.5%
4.0%
1.5%
0.7%
12%
100<1000
12%
5.5%
5.0%
2.0%
1.0%
15%
>1000
15%
7.0%
6.0%
2.5%
1.4%
20%
Table 1.11 Permissible Harmonic Currents at the PCC
The VLT
®
AutomationDrive FC 302 Low Harmonic Drive complies with the following standards:
•
IEC61000-2-4
•
IEC61000-3-4
•
IEEE 519
•
G5/4
Introduction
Installation Manual
MG37A322
Danfoss A/S © Rev. 04/2015 All rights reserved.
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