Siemens SINAMICS G120, Руководство по установке

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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.
There are IT systems with and without trans-
fer 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 line 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.