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

2.2.3

Operation of the Line Connection Components via an Autotransformer

An autotransformer can be used for voltage adaptation in the range up to 3-ph. 480 V AC
+10% or 1-ph. 240 V AC +10%.
Caution
To ensure protective separation, an isolating transformer must be used for voltages greater
than 3-ph. 480 V AC +10% and 1-ph. 240 V AC +10%.
Application example:
• The motor insulation must be protected from excessive voltages.
Figure 2-5
Equipment Manual AC Drive
Manual, (GH6), 03/2006 Edition, 6SL3097-2AL00-0BP0
Autotransformer
Line-side power components
2.2 Line connection variants
2-5