5.1.3
IT system
In an IT line system, all of the conductors are
insulated with respect to the PE protective
conductor – or connected to the PE protective
conductor through an impedance.
There are IT systems with and without transfer
of the neutral conductor N.
7UDQVIHURI1LPSHGDQFHZLWK
UHVSHFWWR3(SURWHFWLYHFRQGXFWRU
7UDQVIRUPHURU
JHQHUDWRU
7RWKHV\VWHP
([DPSOH
/
/
/
1
3(
Inverter operated on an IT line system
● Inverters with integrated line filter:
– Operation on IT line systems not permissible.
● Inverter without line filter:
– Operation on all IT line systems permissible.
Behavior of the inverter when a ground fault occurs
In some instances, even for a ground fault, the inverter should still remain functional. In cases
such as these, you must install an output reactor. This prevents an overcurrent trip or damage
to the drive.
Connecting-up
5.1 Permissible line supplies
Power Module PM240-2
52
Hardware Installation Manual, 08/2017, A5E33294624B AG
