Operation Of The Line Connection Components Via An Autotransformer - Siemens SINAMICS S120 Equipment Manual

Line Connection
4.8 Line connection variants
4.8.3

Operation of the line connection components via an autotransformer

An autotransformer can be used for voltage adaptation in the range up to 3AC 480 V +10%.
Caution
To ensure safe electrical separation, an isolating transformer must be installed with voltages
greater than 3AC 480 V +10%.
Applications:
• The motor insulation must be protected from excessive voltages.
• The active line module must provide a stabilized DC link voltage. It can be in the range
4-34
380 V to 415 V.
Equipment Manual Booksize Cold-Plate Power Sections
Manual, (GH4), Edition 06.2005, 6SL3097-2AJ00-0BP2