Stop Ramp; End Voltage; Step Down Voltage; Current Limit - ABB PST30 Installation And Maintenance Manual

U
70%
30%
Figure 3: Initial voltage for Start Ramp
U
70%
30%
Figure 4: End voltage for Stop ramp
U
Example 50%
100%
30%
Figure 5: Step down voltage for Stop ramp
10
U
100%
Fixed
voltage
30%
t1
t1 + t2 = set ramp time
I
5
2
Figure 6: Current limit
10.4
1SXU 132 021 M0201
Chapter 10
Functions
10:4 Initial voltage
Path in menu:
Menu/SETTINGS/Functional Settings/
Start/Stop / Init Volt
This parameter makes it possible to set the voltage level where the start ramp begins. If the
initial voltage is set too low, it will cause unneccessary long starting times and unnecessary
heating of the motor.
Parameter text
Init Volt
10:5 End voltage
Path in menu:
100%
Menu/SETTINGS/Functional Settings/
Start/Stop / End Volt
This parameter makes it possible to set the voltage level where the stop ramp ends. This
function will be active only if parameter Stop ramp is used.
Parameter text
End Volt
10:6 Step down voltage
Path in menu:
Menu/SETTINGS/Functional Settings/
End
Start/Stop / Step Down
voltage
30%
When stopping a motor using the stop ramp, the speed will not decrease immediately. The
step down voltage function makes it possible to set a level where the motor speed decreas-
Stop
es as soon as the stop ramp begins. By using, a more optimized stopping of the motor is
Time
achieved. It is mainly used for pump applications.
Parameter text
Step down
10:7 Current limit
Path in menu:
Menu/SETTINGS/Functional Settings/

Current limit

setting reached
Start/Stop / Current Lim
It is possible to limit the starting current by using this function. When the current limit is
reached, the output voltage stays stable until the current level falls below the limit, then the
ramping continues.
t2
Time
The starting current must be high enough to make it possible for the motor to reach the rated speed. The
Current limit
lowest possible current depends on the performance of the motor and the characteristics of the load.
setting
Parameter text
Current Lim
Time
Default value
30%
Default value
30%
Default value
100%
Information!
Default value
4.0 x le
Setting range Description
Initial voltage for Start
30...70%
Ramp
Setting range Description
Initial voltage for Stop
30...70%
Ramp
Setting range Description
Voltage value to which
the softstarter will
30...100% step down at stop and
where it will begin the

stop ramp

Setting range Description
Level of the current
2.0...7xle
limit
Low Voltage Products & Systems
ABB Inc. • 888-385-1221 • www.abb-control.com