Basic Line Connection Modules; Design - Siemens SINAMICS G130 Engineering Manual

SINAMICS S120 Cabinet Modules
Engineering Information

7.3.5 Basic Line Connection Modules

7.3.5.1

Design

SINAMICS S120 Basic Line Connection Modules are Infeeds for two-quadrant operation. They consist of a Line
Connection Module and a liquid-cooled Basic Line Module.
Note:
By contrast with air-cooled S120 Cabinet Modules for which Line Connection Modules and Basic Line Modules are
available as separate Cabinet Modules, the Line Connection Modules and Basic Line Modules for liquid-cooled S120
Cabinet Modules are only available as an optimally coordinated, "all-in-one" module, referred to as the "Basic Line
Connection Module".
Basic Line Connection Modules with output ratings from 360 - 830 kW for 400 V or 355 - 1370 kW for 690 V are
available for liquid-cooled SINAMICS S120 Cabinet Modules.
Example of a Basic Line Connection Module with degree of protection IP55
(Line Connection Module on the left + Basic Line Module on the right)
The Line Connection Module (shown on the left in the picture) includes the line-side connections, the fuse switch
disconnector (≤ 800 A) or circuit breaker (> 800 A) and connects the Basic Line Module to the supply system.
The Basic Line Module (shown on the right in the picture) has a controlled thyristor bridge. In order to precharge the
DC link the firing angle is varied. In normal operation the thyristors work with a firing angle of 0 ° so that they behave
in a very similar way to diodes.
Every Basic Line Module requires a Control Unit. This can be optionally installed in the Line Connection Module. The
Control Unit of adjacent S120 Cabinet Modules (Motor Modules, for example) can however also be used.
It is important to note that the charging capacity for the DC link is limited depending on the device type. Please read
the relevant information in section "Checking the maximum DC link capacitance" in chapter "General Information
about Built-in and Cabinet Units SINAMICS S120".
SINAMICS Engineering Manual – November 2015
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Ó Siemens AG