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

2.2.3

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 % or 1-ph. 240 V AC +10 %.
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
AC Drive
Manual, (GH6), 07/2007 Edition, 6SL3097-2AL00-0BP2
CAUTION
Autotransformer
Line-Side Power Components
2.2 Line connection variants
37