Siemens SINAMICS S120 Manual page 80

Mains connection and line-side power components
3.9 Line connection variants
● The installation altitude is greater than 2000 m above sea level.
● A line filter should always be used for all systems that are not TN or TT systems with
grounded neutral point.
An isolating transformer must have the following properties:
● The transformer must have a star connection on the secondary side.
● The neutral point must be brought out.
Recommended vector group: Dyn5 or Yyn0
The neutral point must be grounded and connected to the PE of the line filter or line reactor.
Remark: If the neutral point is not brought out and/or not connected, then all of the
restrictions of an IT line system apply.
Figure 3-21
80
Connecting to the line supply using an isolating transformer
Manual, (GH6), 07/2016, 6SL3097-4AL00-0BP5
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