Smart Line Modules; Design - Siemens SINAMICS G130 Engineering Manual

SINAMICS S120 Cabinet Modules
Engineering Information
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Smart Line Modules

Design

Smart Line Modules are available for S120 Cabinet Modules in three frame sizes with output power ratings of 250 kW
to 800 kW at 400 V and 450 kW to 1400 kW at 690 V.
The Smart Line Modules can be used in combination with Line Connection Modules. In this case, the two module
types must be directly connected. The SLM cannot be installed at a remote location from the LCM. Possible
combinations can be found in the section "Line Connection Modules".
Example configuration of Smart Line Modules in frame sizes GX, HX und JX
Smart Line Modules do not require, in contrast to Active Line Modules, a line-side filter. Only a line reactor with a
relative short-circuit voltage of 4 % is needed. This line reactor is a standard feature of the Smart Line Modules in the
S120 Cabinet Modules range.
A precharging circuit for the DC link capacitors is integrated into the units. The supply voltage for the precharging
circuit is taken from the Line Connection Module in front of the contactor respectively circuit breaker. It is protected by
separate fuses, which are also installed in the Line Connection Module. It is important to take into account that the
precharging capacity of the precharging circuit responsible for the charging of the DC link capacitors has a unit-
specific limit, which is between 4 times and 7.8 times higher than the DC link capacitance included in the Smart Line
Module itself. Please refer to the section "Checking the maximum DC link capacitance" of the chapter "SINAMICS
S120, General Information about Built-in and Cabinet Units".
SINAMICS Engineering Manual – May 2008
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