Siemens SINAMICS S120 Equipment Manual page 223

Parallel connection of Active Line Modules Chassis-2 to increase power rating
To increase the power, a parallel connection of up to six Active Line Modules Chassis-2 with
the same output is possible.
For a parallel connection of Active Line Modules Chassis-2, the following rules must be
observed:
● Up to 6 identical Active Line Modules Chassis-2 can be connected in parallel.
● The parallel connection can only be implemented with one common Control Unit.
For more than 4 power units, these must be distributed as symmetrically as possible
between at least two DRIVE-CLiQ ports (e.g. 3x 2 Active Line Modules Chassis-2 in
series, or a minimum of 2x 3 Active Line Modules Chassis-2 in series).
● With multiple infeeds, power must be supplied to the systems from a common infeed
point (i.e. the modules cannot be operated on different supplies).
● The Active Line Modules Chassis-2 must supply a shared DC link.
● A derating factor of 5% must be taken into consideration, regardless of the number of
modules connected in parallel.
Note
Mixed operation is not possible
It is only possible to connect identical power units in parallel if all power units have the same
hardware version. Mixed operation of an Active Line Module (article number 6SL3330-
xxxxx–xAAx) and an Active Line Module Chassis-2 (article number 6SL3331-xxxxx–xAA0) is
not possible.
Using the Active Line Modules Chassis-2 in line supplies in conformance with the standard
EN 61000-2-4, Class 2
When using Active Line Modules Chassis-2 in line supplies in conformance with Standard
EN 61000-2-4, Class 2, the following conditions must be carefully observed:
● With the factory preset step-up factor (= 1.5) and an R
4 kHz, the Class 2 of the EN 61000-2-4 is adhered to.
● For a step-up factor ≥1.5, the pulse frequency of Active Line Modules Chassis-2 must be
set to 8 kHz.
When used in the TN system and during operation of the Active Line Module Chassis 2 or
the connected Motor Module with increased pulse frequency, you will receive the
permitted cable lengths upon request.
Air-cooled chassis power units
Manual, 07/2019, 6SL3097-4AE00-0BP9
Line Modules
5.5 Active Line Modules Chassis-2
> 20 and a pulse frequency of
SC
221