Tt Line System - Siemens SINAMICS G120 Hardware Installation Manual
Power module
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Also See for SINAMICS G120:
- List manual (1256 pages) ,
- Manual (732 pages) ,
- Operating instructions manual (550 pages)
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5.1.2
TT line system
In a TT line system, the transformer ground‐
ing and the installation grounding are inde‐
pendent of one another.
There are TT line supplies where the neutral
conductor N is either transferred – or not.
Note
Operation in IEC or UL systems
For installations in compliance with IEC, operation on TT line systems is permissible. For
installations in compliance with UL, operation on TT line systems is not permissible.
Operating converter on a TT line system
• Converter with integrated or external line filter:
– Operation on TT line systems with grounded neutral point permissible.
– Operation on TT line systems without grounded neutral point not permissible.
• Converter without line filter:
– Operation on all TT line systems permissible.
PM250 Power Module
Hardware Installation Manual, 04/2021, A5E36265179B-AB
Connection
5.1 Permissible networks
35
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