Siemens sinamics g120 Hardware Installation Manual page 34

Connecting
4.1 Mains and Motor Connection
TT system
In a TT line system, the transformer grounding and the installation grounding are
independent of one another.
There are TT line supplies where the neutral conductor N is either transferred – or not.
Preconditions and restrictions when connecting an inverter to a TT line system
● Inverter with integrated or external line filter:
– Operation on TT line supply systems with grounded neutral point permissible.
– Operation on TT line systems without grounded neutral point not permissible.
● Inverter without line filter:
– Operation on TT line systems is permissible.
Examples for Power Modules connected to a TT line supply
Figure 4-2
34
TT line system where the neutral conductor N is transferred
Power Module PM230, IP20 / Push-through technology (PT)
Hardware Installation Manual, 06/2014, A5E34331322B AA