Active Line Modules; Description - Siemens SINAMICS S120 Manual

Line Modules

3.4 Active Line Modules

3.4 Active Line Modules
3.4.1

Description

The self-commutating infeed / regenerative 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 line 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.
Table 3- 30 Overview of Active Line Modules
Frame size FX
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 FX or GX. The Active Interface Modules and
Active Line Modules of these frame sizes have degree of protection IP20.
148
Frame size GX Frame size HX Frame size JX
Manual, (GH3), 01/2013, 6SL3097-4AE00-0BP3
Chassis power units