Active Line Modules; Description - Siemens SINAMICS S120 Equipment Manual

4.3

Active Line Modules

4.3.1

Description

The self-commutating infeed / feedback units act as step-up converters and generate a
stabilized DC link voltage that is 1.5x greater than the rated line supply voltage. In this way,
the connected Motor Modules are isolated from the supply voltage. This improves the
dynamic response and control quality because line tolerances and fluctuations do not affect
the motor voltage.
If required, the Active Line Modules can also provide reactive power compensation.
Fig. 4-12
Active Infeed components
An Active Infeed comprises an Active Interface Module and an Active Line Module.
The bypass contactor is fitted in the relevant Active Interface Module on Active Infeeds which
feature an Active Line Module of frame size GXL. Active Interface Modules in these frame
sizes have degree of protection IP20; Active Line Modules in these frame sizes have degree
of protection IP00.
Chassis Power Units Liquid Cooled
SINAMICS S120 Equipment Manual, Edition 12/2007, 6SL3097-2AM00-0BP4
Overview of Active Line Modules
Line Modules
4.3 Active Line Modules
4-19