Siemens SINAMICS G130 Operating Instructions Manual page 428

Functions, monitoring, and protective functions
9.2 Drive functions
Figure 9-9 Potential for energy savings
Legend for top characteristic:
H[%] = Head, P[%] = Flow pressure, Q[%] = Flow rate, V[%] = Volumetric flow
Legend for bottom characteristic:
P[%] = Power drawn by the conveyor motor, n[%] = Speed of conveyor motor
Interpolation points p3320 to p3329 for system characteristic with n = 100%:
P1...P5 = Power drawn, n1...n5 = Speed in accordance with variable speed motor
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Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A