ABB ACS150 series

Actual signals and parameters
109
Parameters in the Long parameter mode
Index
Name/Selection
Description
Def
3007 MOT LOAD CURVE
Defines the load curve together with parameters 3008 ZERO SPEED LOAD
and 3009 BREAK POINT FREQ. With the default value 100%, motor
overload protection is functioning when the constant current exceeds 127%
of the parameter 9906 MOTOR NOM CURR value.
The default overloadability is at the same level as what motor manufacturers
typically allow below 30 °C (86 °F) ambient temperature and below 1000 m
(3300 ft) altitude. When the ambient temperature exceeds 30 °C (86 °F) or
the installation altitude is over 1000 m (3300 ft), decrease the parameter
3007 value according to the motor manufacturer’s recommendation.
Example: If the constant protection level needs to be 115% of the motor
nominal current, set parameter 3007 value to 91% (= 115/127·100%).
Output current relative (%) t o
150
9906 MOTOR NOM CURR
Par. 3007
100 =
127%
Par. 3008
50
f
Par. 3009
100%
50.…150%
Allowed continuous motor load relative to the nominal motor current
3008 ZERO SPEED LOAD
Defines the load curve together with parameters 3007 MOT LOAD CURVE
and 3009 BREAK POINT FREQ.
70%
25.…150%
Allowed continuous motor load at zero speed in percent of the nominal motor
current
3009 BREAK POINT FREQ
Defines the load curve together with parameters 3007 MOT LOAD CUR VE
and 3008 ZERO SPEED LOAD.
Example: Thermal protection trip times when parameters 3006 MOT THERM
TIME, 3007 MOT LOAD CURVE and 3008 ZERO SPEED LOAD have
default values.
I
O
= output curre nt
I
N
= nominal motor current
3.5
I
O
/I
N
f
BRK
= break point frequency
A
A = trip time
3.0
60 s
2.5
90 s
180 s
1.5 300 s
600 s
1.0 ∞
f
O
/f
BRK
0
0 0.2 0.4 0.6 0.8 1.0 1 .2
35 Hz
1…250 Hz
Drive output frequency at 100% load