Tt Line System - Siemens SINAMICS G120 Operating Instructions Manual

Low voltage converters chassis devices with cu240b-2 and cu240e-2

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TT line system

In a TT line system, the transformer grounding

and the installation grounding are independ‐

ent of one another.

There are TT line supplies where the neutral

conductor N is either transferred – or not.

Inverter operated on a TT line system

● Inverter with integrated or external line filter:

– Operation on TT line systems with grounded neutral point permissible.

– Operation on TT line systems without grounded neutral point not permissible.

● Inverter without line filter:

– Operation on all TT line systems permissible.

● For installations in compliance with IEC, operation on a TT line system is permissible. For

installations in compliance with UL, operation on a TT line system is not permissible.

Converter with the CU240B-2 and CU240E-2 Control Units

Operating Instructions, 01/2017, FW V4.7 SP6, A5E34259001B AD

4.4 Connecting the line supply, motor, and inverter components