Tn Line System - Siemens SINAMICS G120 Installation Manual

4.1.1

TN line system

A TN system transfers the PE protective
conductor to the installed plant or system
using a cable.
Generally, in a TN system the neutral point is
grounded. There are versions of a TN sys-
tem with a grounded line conductor, e.g. with
grounded L1.
A TN system can transfer the neutral con-
ductor N and the PE protective conductor
either separately or combined.
Converter connected to a TN system
● Converters with integrated line filter:
– Operation on TN line systems with grounded neutral point permissible.
– Operation on TN line systems with grounded line conductor not permissible.
Note
Special feature of FSG converters
FSG converters with integrated C3 line filter can be operated in TN line systems ≤ 600 V
with a grounded line conductor if you remove the screw for functional grounding.
If you remove the screw for functional grounding, the EMC properties deteriorate and the
requirements of Class C3 are no longer met.
● Converters with external line filter:
– Operation on TN line systems with grounded neutral point permissible.
– Operation on TN line systems with grounded line conductor not permissible.
● Converter without line filter:
– Operation on all TN line systems ≤ 600 V permissible.
– Operation on TN line systems > 600 V and grounded neutral point permissible.
– Operation on TN line systems > 600 V and grounded line conductor not permissible.
Power Module PM240-2
Hardware Installation Manual, 01/2020, A5E33294624B AL
Figure 4-2 Remove screw for functional grounding (Page 46)
Connecting
4.1 Permissible line supplies
47