Program features 49
Pump control features
Note: ABB recommends reading the pump manufacturer’s instructions for optimal
performance.
Reference ramping
Acceleration and deceleration ramping times can be set individually for speed and
frequency reference (Menu - Primary settings - Ramps).
With a speed or frequency reference, the ramps are defined as the time it takes for
the drive to accelerate or decelerate between zero speed or frequency and the value
defined by parameter 46.01 Speed scaling or 46.02 Frequency scaling. For speed
and frequency reference, also the shape of the ramp can be controlled.
Special acceleration/deceleration ramps
The change rate of the motor potentiometer function (page 80) is adjustable. The
same rate applies in both directions.
A deceleration ramp can be defined for emergency stop (“Off3” mode).
Pump protections - Quick ramps
The quick ramp function allows you to use two additional ramp sets to accelerate or
decelerate the pump. The following figure illustrates the acceleration in a quick ramp
mode when both additional ramp sets are used.
In submersible (a.k.a borehole) pumps, the mechanical wearing of bearings can be
reduced by ramping the pump quickly to a certain speed.
1 82.07 Quick ramp 1 upper limit
2 82.12 Quick ramp 2 upper limit
a First stage of acceleration
b Second stage of acceleration
c Third stage of acceleration
a
bc
Time
Speed reference [rpm]
1
2
To Next Page
Loading...
