Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual page 21

Introduction
Limit harmonic currents to specified levels, as shown in Table 1.11. IEEE 519 utilises a ratio between the supply short-circuit
current and the maximum current consumption at the PCC, averaged over 15 minutes or 30 minutes. In certain instances
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
harmonic current fulfills table 10–3 in IEEE 519 for R
I /I (R ) h<11
SC L SCE
<20 4%
20<50 7%
50<100 10%
100<1000 12%
>1000 15%
Table 1.11 Permissible Harmonic Currents at the PCC
®
The VLT HVAC Drive FC 102 Low Harmonic complies with the following standards:
•
IEC61000-2-4
•
IEC61000-3-4
•
IEEE 519
•
G5/4
MG16I322
Operating Instructions
≥20.
sce
11≤h<17 17≤h<23
2.0% 1.5%
3.5% 2.5%
4.5% 4.0%
5.5% 5.0%
7.0% 6.0%
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. Each individual
sce
23≤h<35 35≤h
0.6% 0.3%
1.0% 0.5%
1.5% 0.7%
2.0% 1.0%
2.5% 1.4%
1 1
Total demand
distortion TDD
5%
8%
12%
15%
20%
19