ABB PST72 Installation And Commissioning Manual

Functions
Chapter 10
137
1SFC132003M0201
10:10 Current limit
Path in menu:
Menu/SETTINGS/Functional Settings/
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.
The starting current must be high enough to make it possible
for the motor to reach the rated speed. The lowest possible
current depends on the performance of the motor and the
characteristics of the load.
10:11 Torque limit
Path in menu:
Menu/SETTINGS/Functional Settings/
Torque control / Torque Limit
It is possible to limit the starting torque by setting this
parameter. When the torque limit is reached, the output
voltage stays stable until the torque falls below the limit, then
the ramping continues.
Torque limit is only available when start mode is set to
torque.
Parameter
text
Default value Setting range Description
Current Lim 4.0 x I
e
2.0...7.0x I
e
Level of the
current limit
U
30%
100%
t1
t2
I
2
5
1SFC132100F0001
F
igure 10: Current limit
FixedF
Time
Time
t1+t2 = set ramp time
Set level of
current limit
Reached set level
of current limit
Fixed voltage
Nm
1SFC132167F0001
Figure 11: Torque limit
Time
Torque
limit
Torque limit reached
Available torque/
Torque during DOL start
Parameter
text
Default value Setting range Description
Torque
Limit
150 % 20...200% Level of the
torque limit
compared to
the nominal
torque of the
motor

ABB PST72 Specifications

General

Brand	ABB
Model	PST72
Category	Controller
Language	English