Connecting-up
5.1 Permissible line supplies
Power Module PM240-2
Hardware Installation Manual, 01/2017, A5E33294624B AE
45
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.
Inverter operated on a TT line system
●
Inverter 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.
●
Inverter without line filter:
–
Operation on all TT line systems permissible.
●
For installations in compliance with IEC, operation on a TT line system is permissible. For
installations in compliance with UL, operation on a TT line system is not permissible.
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