Operating Line Connection Components Via An Autotransformer - Siemens SINAMICS S120 Manual

Line connection and line-side power components
3.11 Line connection variants
3.11.3.4

Operating line connection components via an autotransformer

An autotransformer can be used to step up or step down the voltage in the range up to 3-ph.
480 VAC +10%.
Applications:
● The motor insulation must be protected from excessive voltages.
● The Active Line Module must supply a regulated DC link voltage. This is possible with a
rated voltage of 380 V to 415 V.
In conjunction with motors that may be operated with a DC link voltage of up to 660 V,
and a line voltage > 415 V, a controlled DC link voltage is required.
Figure 3-65
146
Operation of a Line Module via an autotransformer
Booksize Power Units
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8