Siemens SINAMICS G150 Operating Instructions Manual page 85

Note
If an incorrect phase sequence was connected when the motor was connected, p1821
(phase sequence direction reversal) can be used to correct the incorrect phase sequence
without physically changing it over (see "Functions, monitoring and protective
functions/direction reversal").
The correct phase sequence must be observed in both sub-cabinets when connecting
cabinet units in parallel, since it is not possible to use converter functions to correct different
connection sequences in the two sub-cabinets at a later stage.
With motors that can be star-connected or delta-connected, it must be ensured that the
windings are interconnected consistent with the operating voltage indicated on the type plate
or in the motor documentation. Make sure that the winding insulation of the connected motor
has sufficient insulation strength to meet the requirements for converter operation.
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A
Electrical installation
4.8 Power connections
83