Siemens Sinamics PM250 Hardware Installation Manual page 30

Connection
5.1 Line and motor connection
TN line system
A TN line system transfers the PE protective conductor to the installed plant or system using
a cable.
Generally, in a TN line system the neutral point is grounded. There are versions of a TN line
supply with a grounded line the conductor, e.g. with grounded L1.
A TN line system can transfer the neutral conductor N and the PE protective conductor either
separately or combined.
Inverter operated on a TN line system
● Inverter with integrated or external line filter:
– Operation on TN line systems with grounded neutral point permissible.
– Operation on TN line systems with grounded line conductor not permissible.
● Inverter without line filter:
– Operation permissible on all TN line systems.
Examples for Power Modules connected to a TN line supply
Image 5-1
30
TN line supply with separate transfer of N and PE and with a grounded neutral point
Hardware Installation Manual, 01/2016, A5E36265179B-AA
PM250 Power Module