Typical current harmonics with LHF when operating with LO rated power (in percentage of the
fundamental current):
Converter
R
SC
I5
I7
I11
I13
I15
I17
I23
I25
THC
FSB … FSG /
400 V
33
1.7%
1.9%
2.2%
1.5%
0.8%
0.8%
0.7%
0.6%
4.2%
120
1.8%
2.2%
2.4%
1.6%
0.8%
0.8%
0.7%
0.6%
4.4%
The power factor λ improves with LHF to approx. 98% when operating with rated output.
With an upstream LHF, the converters satisfy the limit values of IEC 61000-3-2 and IEC
61000-3-12.
11.8.3.5
Harmonics at the power supply connection point acc. to IEC 61000-2-2
Description
IEC 61000-2-2 defines the compatibility level for voltage harmonics for the point of common
coupling (PCC) with the public supply system.
For systems in which converters or other non-linear loads are widely used, a circuit feedback
calculation that takes the individual system configuration into consideration should always be
performed.
The converter with upstream Line Harmonics Filters (LHF) allows adherence to the
compatibility level for voltage harmonics, regardless of what percentage of the overall load is
made up of the converter load.
Note
The voltage distortions behavior in the frequency range of 2 kHz to 9 kHz (IEC 61000-2-2 AMD
1) and from 9 kHz to 150 kHz (IEC 61000-2-2 AMD 2) must be evaluated specifically for each
system as a function of the impedance at the power supply connection point.
11.8.3.6
Harmonics at the power supply connection point acc. to IEEE 519
Description
IEEE 519 defines limit values for voltage and current harmonics for all of the loads at the point
of common coupling (PCC).
As a rule, systems only satisfy the limit values of IEEE 519 without implementing special
measures if the share of converters and other non-linear loads in the overall load is relatively
low. The respective system should always be individually considered.
The converter with upstream Line Harmonics Filters (LHF) enables adherence to the limit
values of IEEE 519 (precondition: R
SC
≥ 20).
Technical data
11.8 Electromagnetic compability of the converter
SINAMICS G120X converter
1106
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
Содержание SINAMICS G120X
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