Siemens SINAMICS (VFD)

Speed Control of Pump Motor

Controls motor RPM

Adjusts pump flow without changing valves

Allows testing at different operating points

Since pump flow depends on speed:

Increase frequency → Increase flow

Decrease frequency → Decrease flow

Soft Start / Soft Stop

Instead of direct ON:

Reduces starting current

Prevents mechanical shock

Protects pump and motor

Power Measurement

Voltage

Current

Power

Frequency