It System - Siemens SINAMICS G120 Hardware Installation Manual

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.
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.
Power Module PM230, IP20 / Push-through technology (PT)
Hardware Installation Manual, 08/2016, A5E34331322B AB
Connecting
5.1 Permissible line supplies
43