Siemens SINAMICS S120 Function Manual page 303

Note
The voltage boost affects all V/f characteristics (p1300).
Note
Excessive motor temperature rise as a result of excessive voltage boost
If the voltage boost value is too high, this can result in an excessively high motor winding
temperature increase - and therefore result in a shutdown (trip).
Voltage boost, permanent
V
permanent
Figure 6-3
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
= p0305 (rated motor current · p0395 (actual stator resistance) · p1310 (permanent voltage
boost)
Permanent voltage boost (example: p1300 = 0 and p1310 > 0)
V/f control (vector control)
6.2 Voltage boost
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