● Basic Line Modules (BLM), 6-pulse and 12-pulse (each with the associated line reactors)
● Smart Line Modules (SLM), 6-pulse and 12-pulse (each with the associated line reactors)
● Active Line Modules (ALM), 6-pulse and 12-pulse (each with the associated Active
● Motor Modules (in vector control mode)
Note
Exceptions for combined operation of Line Modules
Smart Line Modules may be operated together with Basic Line Modules whose last digit of
the order number is a "3" (Chassis) or a "2" (Cabinet) with one or several CUs if precisely
defined preconditions and the information in the Configuration Manual are maintained. You
can find this information in the "SINAMICS - Low Voltage Configuration Manual".
A slight reduction of the rated current must be considered for parallel connection of power
units. The reduction of the rated current (derating) of a power unit for parallel connection is:
● 7.5% for parallel connections of SINAMICS S120 Basic Line Modules and SINAMICS
● 5.0% for parallel connections of SINAMICS S120 Active Line Modules and SINAMICS
7.11.1
Applications of parallel connections
Power units can be connected in parallel (infeeds) in the following cases:
Variant
6-pulse circuit
12-pulse circuit
The following diagram is an overview of the module variants discussed in this section for
inclusion in power unit parallel connections.
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Interface Modules)
S120 Smart Line Modules when neither module is equipped with a current compensation
control.
S120 Motor Modules when each module is operates with a current compensation control.
Condition
The modules connected in parallel are supplied from a two-winding
transformer.
The modules connected in parallel are supplied via a three-winding
transformer, whose secondary windings supply voltages with a phase shift of
30°.
Function modules
7.11 Parallel connection of power units
403