Siemens SINAMICS S120 - Operation of the Line Connection Components Via an Autotransformer

Line Connection Booksize
2.13 Line connection variants
Booksize power units
126 Manual, (GH2), 06/2008, 6SL3097-2AC00-0BP6
2.13.3.3 Operation of the line connection components via an autotransformer
An autotransformer can be used to adapt the voltage in the range up to 3-ph. 480 V AC +10 %.
DANGER
To ensure protective separation an isolating transformer must be used for voltages greater
than 3-ph. AC 480 V AC +10 %.
Applications:
● The motor insulation must be protected from excessive voltages.
● The active line module must provide a stabilized DC link voltage. This is possible with a
rated voltage of 380 V to 415 V.
A combination with motors that may be operated with a DC link voltage of up to 660 V,
and a line voltage > 415 V requires a controlled DC link voltage.