ABB PSTX Series Installation And Commissioning Manual page 77

7.2.2 Voltage stop ramp
When the Softstarter receives a stop signal, the
Softstarter decreases the output voltage to the motor in a
quick stop ramp, from full voltage down to set Step down
voltage level. For best performance, set the step down
level to 80%.
When step down level is reached, the Softstarter controls
the output voltage during preset Stop ramp time to End
voltage level and cuts the output voltage to the motor,
see Figure 7.3.
Configuration of the Voltage stop ramp with these
parameters:
Parameter
02.02 Stop mode
02.05 Stop ramp end level
02.06 Stop ramp time
28.05 Step down level
Description
Set to voltage ramp.
Sets the level from where the stop ramp ends and the
power to the motor is cut (voltage level for Voltage stop
and torque level for Torque stop).
Sets the effective time it takes for the voltage to come at
end level
Sets the level from where the stop ramp initiates.
1SFC132081M0201
U
100%
80%
30%
Stop ramp time
Figure 7.3
Voltage stop ramp
Setting range
No ramp,Voltage
ramp, Torque
ramp, Dynamic
brake
10 ... 99%
1 ... 120 s
10 ... 100%
| Installation and commissioning manual | Functions
Step down voltage
End voltage
Time
Default value
No ramp
7
30%
10 s
80%
77