Parallel Connections - Siemens SINAMICS G130 Engineering Manual

SINAMICS S120 Cabinet Modules
Engineering Information
Modules which can be connected in parallel on a Line Connection Module are highlighted in yellow in the table. With
these applications, the rectifiers are positioned on the right and left of the cabinet.
When Line Connection Modules are ordered, the option code L42, L43 or L44 must be added to the order number in
order to indicate whether the LCM will be connected to an Active Line (L42), a Basic Line (L43) or a Smart Line
Module (L44).
This information is required to ensure that the LCM is correctly equipped in the factory.
This applies primarily to the busbar connection at the three-phase end (3AC), to possible precharging circuits and to
the specification of line reactors for Basic Line Modules which can be excluded with option L22.
When Cabinet Modules are selected and combined as defined in the above assignment table, the Line Connection
Modules are equipped and prepared as specified in the factory.
For other combinations of Cabinet Modules which deviate from the standard, please ask your Siemens contact for
further information.

Parallel connections

Parallel connections can be created with Line Connection Modules. Line Modules can be operated in a double
parallel connection on one LCM in frame sizes KL and LL. In addition it is easy feasible to implement parallel
connections of larger numbers of rectifiers by paralleling Line Connection Modules.
Example:
Implementation of a triple parallel connection of BLMs
a) In the configuration illustrated above, a triple parallel connection of Basic Line Modules has been created
using two Line Connection Modules. One LCM of frame size LL or KL is connected to two BLMs and
another LCM supplies the third BLM. The size of this second LCM can be selected according to the rated
current of the BLM and need not necessarily be the same size as the other Line Connection Module in the
configuration.
b) Three identical combinations of LCM-BLM have been used in this configuration.
The parallel connection is made up of standard components. Orders for modules for parallel connection are not
subject to any special conditions. Line Connection Modules prepared for parallel connection (displayed on yellow
background in the table above) already include two reactors when used with Basic Line Modules. Smart Line
Modules are generally equipped with reactors which are integrated in the SLM. Please note the supplementary
physical conditions described in the chapter "Fundamental Principles and System Description".
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