Pump Curves - ABB +N5600 Firmware Instructions

60 ESP program features

Pump curves

Q-H pump curves typically provided by the pump manufacturer can be used for the
actual flow rate estimation, provided that total dynamic head measurement is
available. You can connect both, intake and discharge pressure measurement signals
directly to the drive through analog inputs of Fieldbus.
ESP control program allows you to enter up to five Q-H curves for the pump running
at corresponding frequencies. The flow estimate calculation is then completed based
on motor actual speed and head (pressure) measurement input. For the speeds
beyond the frequency range covered by the pump curves, the flow estimate is then
based on affinity law.
Note: In case actual flow rate is already measured with a flow-meter, then you can
configure the same Q-H curves to be used opposite way around, i.e. for indirect
estimate of the total dynamic head.
Head
85.10 Head at
0 flowrate 1
Downthrust zone 1
Settings
Parameter groups
Parameter 85.10 Head at 0 flowrate 1...85.19 Workzone 2/3 Head 1
85.60 Curve fine tune enable
85.16 DNT
zone 50%
85.12 Downthrust
Head 1
head 1
85.13 Downthrust
flowrate 1
85 Q-H pump curves
(page 449).
85.18 Workzone
1/3 Head 1
85.19 Workzone
2/3 Head 1
Work zone 1
85.15 Upthrust
flowrate 1
(page 446).
85.14 Upthrust
head 1
85.17 UPT zone
50% Head 1
Upthrust zone 1
85.11 Flowrate
max 1
(page 447),
Flow