Operation Of The Line Connection Components Via An Isolating Transformer - Siemens SINAMICS S110 Manual

3.9.5

Operation of the line connection components via an isolating transformer

The isolating transformer converts the type of system grounding of the installation (e.g. IT
system) to a TN system with grounded neutral point. Additional voltage adaptation to the
permissible voltage tolerance range is possible.
An isolating transformer must be used in the following cases:
● The insulation of the Power Module and/or the motor is not adequate for the voltages that
occur.
● There is no compatibility to an existing residual current device.
● 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.
Figure 3-19
SINAMICS S110
Manual, 07/2015, 6SL3097-4AC10-0BP5
Isolating transformer
Mains connection and line-side power components
3.9 Line connection variants
65