Installing
4.5 Connecting the line supply, motor, and inverter components
Converter with the CU240B-2 and CU240E-2 Control Units
78 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
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
system with a grounded line 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 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.
Examples for inverters connected to a TN line system
Image 4-2 TN line supply with separate transfer of N and PE and with a grounded neutral point
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