Input Single-Phase Rollback - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

Operating the Control
7.10 Drive Output Torque Limiting
Figure 7-22
7.10.3

Input Single-Phase Rollback

With NXGpro control, input voltage unbalance (E
torque. The figure below shows the reduction in drive power as a function of the unbalance
voltage. When the unbalance is less than 10%, the drive operates without any output limitation.
There is a linear reduction as the unbalance voltage increases from 10% to 30%, at which point
the input has a single-phase condition. When the input line voltage unbalance increases above
30%, the drive limits the amount of output power that can be delivered to the load to 40% of
rated.
A regulator is implemented to match the maximum drive power (P
flowing from the drive. The output of this regulator sets the output torque limit.
214
Old and New Curves
) is used for rolling back the drive output
unbalance
) with the actual power
max
Operating Manual, A5E50491925A
NXGPro+ Control Manual