Siemens SINAMICS PM240-2 - IT system

Connecting
4.1 Permissible line supplies
Power Module PM240-2
Hardware Installation Manual, 01/2020, A5E33294624B AL
49
4.1.3 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 protec-
tive conductor through an impedance.
The
re are IT systems with and without trans-
f
er of the neutral conductor N.
Note
Behavior of the converter when a ground fault occurs
If the converter is to remain operable even when a ground fault occurs at the converter
output, you must install an output reactor. This prevents an overcurrent trip or damage
to the
drive.
Converters connected to an IT system
● Converters with integrated line filter:
– Operation on IT line systems not permissible.
Note
Special feature of FSG converters
FSG converters with integrated C3 line filter can be operated in IT lin
e systems if you
remove the screw for functional grounding.
Figure 4-2 Remove screw for functional grounding (Page 46)
If you remove the screw for functional grounding, the EMC properties deteriorate and
the requirements of Class C3 are no longer met.
● Converters without line filter:
– Operation on all IT line systems permissible.
Note
690 V converters: Output reactors for frame sizes FSD and FSE
An output reactor is required for 690 V reactors in frame sizes FSD and FSE.