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Application planning
4.8 Operation on a TT system
4.8
Operation on a TT system
Overview
The converter is suitable for connection to a TT system.
Requirement
The following applies to the connection of converters to a TT system:
• Operation in installations according to IEC and UL
– For installations according to IEC, operation on TT systems is permissible.
– For installations according to UL, operation on TT systems is not permissible.
• Converter with integrated or external line filter
– Operation on TT systems with grounded neutral point is permissible
– Operation on TT systems without grounded neutral point is not permissible
• Converter without line filter
– Operation on all TT systems 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.
Figure 4-2
72
Example: Transfer of the neutral conductor, grounded neutral point
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
SINAMICS G220 converter
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