Siemens SINAMICS G130 Engineering Manual page 89

The following points must also be noted:
Each converter must have its own LHF. It is not permissible to operate more than one low-power converter on a
single high-power LHF.
The power rating of the converter must not be less than two grades lower than that of the Line Harmonics Filter LHF.
Otherwise the mismatching of the line reactors will influence the resonance frequency on the converter side too
much, thereby reducing the effectiveness of the filter. With this in mind, Line Harmonics Filters are available for the
following converter output power ratings:
Supply voltage
380 V – 480 V 3AC
500 V – 600 V 3AC
660 V – 690 V 3AC
The relative short circuit power RSC of the supply system must have a value of at least 10. If the short circuit power
is any smaller, the line-side resonance frequency will be affected too much and the fundamental wave of the line
voltage may increase considerably until it reaches values beyond the permissible line voltage tolerance of the
converter.
Line-side fuse protection for the Line Harmonics Filters should be implemented using the same fuse types as those
recommended in Catalog D 11 as line-side power components for protecting the corresponding converters.
If line-side switches or contactors are used for switching on/off a Line Harmonics Filter, these must be dimensioned
for the making current involved, which is in the same order of magnitude as the rated current. For this reason,
contactors from utilization category AC-1 (switching of resistive loads) can be used.
The converter-side main contactor or the converter-side circuit breaker must not connect the converter to the filter,
before the filter is connected to the supply. When shutting down the system, the converter must always be
disconnected from the filter by means of the main contactor or the circuit breaker, before the filter is disconnected
from the supply.
Line Harmonics Filters can be connected in parallel in order to increase the power. A current derating of 7.5 % must
be taken into account.
Line Harmonics Filters LHF can also be used with G150 parallel converters (G150 power extension), if a 6-pulse
power supply is given and both partial converters are fed from the same supply resp. the same transformer winding.
In this case, each partial converter must be connected to a Line Harmonics Filter on the line side, which is adapted to
the power of the partial converter.
With a 12-pulse line connection, the use of a Line Harmonics Filter does not make technical sense because no
additional improvement of the harmonic effects will be achieved.
LHFs can be used at ambient temperatures of > 40 °C to maximum 50 °C. Current derating of 2 % per °C must be
applied at ambient temperatures of > 40 °C.
Line Harmonics Filter LHF can be operated on both, 50 Hz and 60 Hz supply systems. The supply frequency is
selected through reconnection of jumper links in the filter at the commissioning stage. The supply frequency is set for
50 Hz in the delivery state (factory setting).
LHFs can be connected to the following supply systems:
Line supply voltage / line frequency
380 V – 415 V 3AC ±10% / 50 Hz, changeable to
440 V – 480 V 3AC ±10% / 60 Hz
500 V – 600 V 3AC ±10% / 50 Hz, changeable to
500 V – 600 V 3AC ±10% / 60Hz
660 V – 690 V 3AC ±10% / 50 Hz, changeable to
660 V – 690 V 3AC ±10% / 60 Hz
Line Harmonics Filters LHF can be used in grounded (TN/TT) and non-grounded (IT) supply systems.
Line Harmonics Filters should not be operated on supply systems with reactive current compensation systems, nor in
combination with other 6-pulse converters that are not equipped with Line Harmonics Filters, nor in combination with
devices that operate with pronounced phase angle control.
Fundamental Principles and System Description
Rated converter power
≥ 160 kW
≥ 110 kW
≥ 160 kW
SINAMICS Engineering Manual – November 2015
Engineering Information
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