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

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Operation of the line connection components via an autotransformer

An autotransformer can be used to adapt the voltage in the range up to 480 V 3 AC +10 %.

To ensure protective separation an isolating transformer must be used for voltages greater

than 480 V 3 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

Booksize Power Units

Equipment Manual, (GH2), 07/2007, 6SL3097-2AC00-0BP5

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.

Line Connection Booksize

2.13 Line connection variants