Line Harmonics Filter (Lhf) For Reducing Current Harmonics - Siemens SINAMICS G120X Operating Instructions Manual

Depending on the rated output and the rated input current of the device, different requirements
result for the direct connection to the low-voltage system.
LO base load
power
≤ 1 kW
> 1 kW
When operated with LO rated power, the converter generates the following typical current
harmonics (as a percentage of the fundamental current):
Converter
FSA ... FSG
FSH, FSJ with
2% line reactor
The SIZER configuration tool allows the individual calculation of the harmonic parameters.
10804987/130000)

Line Harmonics Filter (LHF) for reducing current harmonics

The passive LHF (Line Harmonics Filters) available for the converter allow a significant
reduction of the current harmonics. It is especially recommended that LHF be used if devices
FSE ... FSG (above 75 A rated input current) are to be operated on the public low-voltage
system.
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
LO input cur‐
rent
-
≤ 16 A
> 16 A and ≤
75 A
> 75 A:
R I5
SC
120 38%
50 37%
Download SIZER (http://support.automation.siemens.com/WW/view/en/
11.8 Electromagnetic compability of the converter
The converters comply with the requirements of IEC 61000-3-2.
No limit value requirements are defined in IEC 61000-3-2 for professio‐
nally used devices of this output range.
Notification of the network operator and a system evaluation according
to IEC 61000-3-14 or 61800-3 Annex B.4 are recommended.
The converters comply with IEC 61000-3-12 (Table 4), provided that the
short-circuit capacity (SSC) at the point of connection of the customer
system to the public network is greater than or equal to the value in the
formula below.
S = U² / Z ≥ 120 · √3 · U
SC rated
The installer or plant operator must ensure that the converters are only
connected to a supply system with sufficient short-circuit capacity.
If the converters are to be connected to a supply system with a lower
short-circuit capacity, the installer or plant operator must obtain a con‐
nection approval from the network operator in regard to harmonic cur‐
rents.
No limit values for current harmonics are defined for these devices in the
IEC standards. Notification of the network operator and a system eval‐
uation according to IEC 61000-3-14 or 61800-3 Annex B.4 are recom‐
mended.
The converters FSH and FSJ always require an upstream line reactor
and an upstream line filter for operating on the public low-voltage sys‐
tem.
I7 I11 I13
18% 8% 5%
13% 7% 3%
· I
rated LO
I17 I19 I23
4% 3% 3%
3% 2% 1%
Technical data
I25 THC
2% 43%
1% 40%
1105