Pump 1 - connected to VSD motor
Pump 2 - connected to auxiliary motor 1
Pump 3 - connected to auxiliary motor 2
Flow consumption versus pump status
Consumption Pump 1 Pump 2 Pump 3
Low
↓
High
↓
Low
VSD Off Off
VSD DOL Off
VSD DOL DOL
VSD DOL Off
VSD Off Off
VSD Variable Speed Drive (yellow colour connecting line in the figure).
Controlled by drive, tuning the output speed according to PID control.
DOL Direct On Line (red colour connecting line in the figure). Pump is running
at fixed motor nominal speed.
Off Off-line. Pump stops.
To Next Page
Loading...
