Line Harmonics Filter; Line Filters - Siemens SINAMICS G130 Engineering Manual

In this case, the short-circuit power S
S
Transf
=
S
k 1
S
Transf
+
v
k Transf
S
k 2 Line
Abbreviation Meaning
S Rated apparent power of the transformer
Transf
v Relative short-circuit voltage of the transformer
k Transf
S Short-circuit power of the higher voltage level
k2 Line
Line reactors must always be provided if more than one rectifier is connected to the same point of common coupling.
In this instance, the reactors perform two functions, i.e. they smooth the line current and decouple the rectifiers at the
line side. This decoupling is essential in ensuring fault-free operation of the rectifier circuit. For this reason, each
rectifier must be provided with its own line reactor, i.e. it is not permissible for more than one rectifier to be connected
to the same line reactor.
A line reactor must also be installed for any rectifier that is to be equipped with a line filter for RFI suppression. This is
because filters of this type cannot be 100% effective without a line reactor.
Another constellation which requires the use of line reactors is the parallel connection of rectifiers where these are
connected to a common power supply point. This usually applies to 6-pulse connections. The line reactors provide for
balanced current distribution and ensure that no individual rectifier is overloaded by excessive current imbalances.
7.2.2.8

Line Harmonics Filter

Line Harmonics Filters for reducing harmonic effects on the supply system are not included in the air-cooled
SINAMICS S120 Cabinet Modules product range.
To reduce harmonic effects on the supply system, 12-pulse connections with a three-winding transformer or active
Infeeds with the SINAMICS S120 Active Infeed must be used.
7.2.2.9

Line filters

The Infeeds in the SINAMICS S120 Cabinet Modules range are equipped as standard with an integrated line filter for
limiting conducted interference emissions in accordance with EMC product standard EN 61800-3, category C3
(applications in industrial areas or in the "second" environment). These standard line filters are installed in the Basic
Line Module for the Basic Infeed, in the Smart Line Module for the Smart Infeed and in the Active Interface Module
for the Active Infeed.
The Infeeds in the SINAMICS S120 Cabinet Modules range can be optionally equipped with an additional line filter
(option L00) for limiting conducted interference emissions in accordance with EMC product standard EN 61800-3,
category C2 (applications in residential areas or in the "first" environment). The optional line filter is always installed in
the Line Connection Module which belongs to the relevant Line Module. The use of optional line filters (option L00)
for parallel connections of S120 Line Modules for applications in the first environment in accordance with category C2
is possible only if a separate Line Connection Module is provided for each of the parallel-connected Line Modules.
Option L00 is not suitable for implementing an arrangement in which one Line Connection Module is shared by two
Line Modules in a "mirror-image" mechanical setup.
SINAMICS S120 Cabinet Modules
at the PCC of the Basic Line Module is approximately
k1
SINAMICS Engineering Manual – November 2015
Engineering Information
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