Siemens SINAMICS S120 - Page 8

List of Contents
Engineering Information
SINAMICS Engineering Manual – November 2015
Ó Siemens AG
8/528
1.10.2.1 Design and operating principle ..................................................................................................... 153
1.10.2.2 Supplementary conditions which apply when dv/dt-filters are used ................................................ 154
1.10.3 Sine-wave filters .......................................................................................................................... 155
1.10.3.1 Design and operating principle ..................................................................................................... 155
1.10.3.2 Supplementary conditions which apply when sine-wave filters are used ......................................... 156
1.10.4 Comparison of the properties of the motor-side reactors and filters ................................................ 157
1.11 – – – .......................................................................................................................................................... 159
1.12 Power cycling capability of IGBT modules and inverter power units ..................................................... 159
1.12.1 General ....................................................................................................................................... 159
1.12.2 IGBT module with cyclically alternating current load ...................................................................... 159
1.12.3 Dimensioning of the power units for operation at low output frequencies ........................................ 160
1.13 Load duty cycles ...................................................................................................................................... 164
1.13.1 General ....................................................................................................................................... 164
1.13.2 Standard load duty cycles ............................................................................................................ 164
1.13.3 Free load duty cycles ................................................................................................................... 165
1.13.4 Thermal monitoring of the power unit ............................................................................................ 179
1.13.5 Operation of converters at increased pulse frequency ................................................................... 179
1.14 Efficiency of SINAMICS converters at full load and at partial load ......................................................... 183
1.14.1 Converter efficiency at full load ..................................................................................................... 183
1.14.2 Converter efficiency at partial load ................................................................................................ 184
1.14.2.1 – – – ............................................................................................................................................ 184
1.14.2.2 Partial load efficiency of S120 Basic Line Modules ........................................................................ 184
1.14.2.3 Partial load efficiency of S120 Smart Line Modules ....................................................................... 185
1.14.2.4 Partial load efficiency of S120 Active Line Modules + Active Interface Modules .............................. 185
1.14.2.5 Partial load efficiency of S120 Motor Modules ............................................................................... 186
1.14.2.6 Partial load efficiency of G130 / G150 converters .......................................................................... 187
1.14.2.7 Partial load efficiency of S150 converters ...................................................................................... 190
1.15 Parallel connections of converters .......................................................................................................... 193
1.15.1 General ....................................................................................................................................... 193
1.15.2 Parallel connections of SINAMICS converters ............................................................................... 193
1.15.3 Parallel connection of S120 Basic Line Modules ........................................................................... 195
1.15.4 Parallel connection of S120 Smart Line Modules ........................................................................... 197
1.15.5 Parallel connection of S120 Active Line Modules .......................................................................... 199
1.15.6 Parallel connection of S120 Motor Modules .................................................................................. 201
1.15.7 Admissible and inadmissible winding systems for parallel connections of converters ...................... 203
1.16 Liquid-cooled SINAMICS S120 units ........................................................................................................ 206
1.16.1 General ....................................................................................................................................... 206
1.16.2 Design of the liquid-cooled SINAMICS S120 units ......................................................................... 206
1.16.3 Cooling circuit and coolant requirements....................................................................................... 207
1.16.4 Example of a closed cooling circuit for liquid-cooled SINAMICS S120 units.................................... 210
1.16.5 Example of an open cooling circuit for liquid-cooled SINAMICS S120 units .................................... 210
1.16.6 Example of coolant temperature control for condensation prevention ............................................. 211
1.16.7 Information about cooling circuit configuration ............................................................................... 214
1.16.8 Information about cabinet design .................................................................................................. 223