Applications Of Parallel Connections - Siemens SINAMICS S120 Function Manual

Hide thumbs Also See for SINAMICS S120:

Table of Contents

Function modules

9.10 Parallel connection of power units

Exceptions for combined operation of Line Modules

Smart Line Modules may be operated together with Basic Line Modules that have Article

numbers ending with 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 will

find this information in "SINAMICS - Low Voltage Engineering Manual

support.industry.siemens.com/cs/ww/en/view/83180185)".

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 % when connecting SINAMICS S120 Basic Line Modules and SINAMICS S120 Smart

Line Modules in parallel, each of which has no current compensation control.

● 5.0% when SINAMICS S120 Active Line Modules are connected in parallel with

SINAMICS S120 Motor Modules, each of which operate with a current compensation

Applications of parallel connections

Power units can be connected in parallel (infeeds) in the following cases:

● 6-pulse circuit

The modules connected in parallel are supplied from a two-winding transformer.

● 12-pulse circuit

The modules connected in parallel are supplied via a three-winding transformer, whose

secondary windings supply voltages with a phase shift of 30°.

Overview: Parallel connection of power units

Function Manual, 06/2019, 6SL3097-5AB00-0BP2

Drive functions