Siemens Sinamics S120 Function Manual page 411

Active Line Modules are available for the following voltages and power ratings:
Table 7- 9
Line supply voltage
380 to 480 V AC, 3-phase
500 to 690 V AC, 3-phase
The following rules must be observed when connecting Active Line Modules in parallel:
● Up to 4 identical Active Line Modules can be connected in parallel.
● Active Line Modules can only be connected and operated in parallel in the vector control
● A common Control Unit must always be used to implement the parallel connection.
● Special Line Connection Modules are available for connecting the modules in parallel.
● With multiple infeeds, power must be supplied to the systems from a common infeed
● A derating factor of 5% must be taken into consideration, regardless of the number of
The following measures help to ensure balanced currents in parallel connections of Active
Line Modules:
● Reactors in the Clean Power Filters of the Active Interface Modules.
● Use of symmetrical power cabling between the transformer and the parallel-connected
● The current reduction from the rated value for individual Active Interface Modules / Active
6-pulse, redundant parallel connection of Active Line Modules with multiple Control Units
For a description of parallel connections of multiple Active Line Modules under the control of
separate Control Units, please refer to section " Master/slave function for infeeds".
12-pulse parallel connection of Active Line Modules
The 12-pulse parallel connection can operate in master-slave mode (section "Master/slave
function for infeeds").
Modules with different ratings can be included in the connection (as in the case of 6-pulse
master-slave operation).
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Active Line Modules
mode.
point (i.e. the modules cannot be operated on different line supplies).
modules connected in parallel.
Active Interface Modules / Active Line Modules (cables of identical type with the same
cross-section and length).
Line Modules in a parallel connection is 5 %.
7.11 Parallel connection of power units
Rated power
132 ... 900 kW
560 ... 1400 kW
Function modules
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