Siemens SINAMICS S220

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Figure4-1 TN system
4.6 Operation on a TT system
Overview
The drive line-up is suitable for connection to a TT system.
Requirement
The following applies when connecting line 󹪝lters and Line Modules to a TT system:
• Operation in IEC or UL systems
– For installations according to IEC, operation on TT systems is permissible.
– For installations according to UL, operation on TT systems is not permissible.
• Line 󹪝lters and Line Modules
– Operation on TT systems with grounded neutral point is permissible
– Operation on TT systems without grounded neutral point is not permissible
Description
In a TT system, the PE protective conductor of the transformer and the installed system are
independent of one another.
There are TT systems with and without transfer of the neutral conductor N.
Application planning
4.6Operation on a TT system
Booksize power units
44 Equipment Manual, 09/2023, A5E53307519B AA