ABB ACS150 series User Manual page 110

Parameters in the Long parameter mode
Index Name/Selection
3007 MOT LOAD CURVE
50....150%
3008 ZERO SPEED LOAD
25....150%
3009 BREAK POINT FREQ
1...250 Hz
Description
Defines the load curve together with parameters
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%).
150
Par. 3007 100 =
127%
50
Par. 3008
Allowed continuous motor load relative to the nominal motor current
Defines the load curve together with parameters
and 3009 BREAK POINT FREQ.
Allowed continuous motor load at zero speed in percent of the nominal motor
current
Defines the load curve together with parameters
and 3008 ZERO SPEED LOAD.
Example: Thermal protection trip times when parameters
TIME, 3007 MOT LOAD CURVE and
default values.
I /I
O N
3.5
3.0
2.5
1.5
1.0
0
0 0.2
Drive output frequency at 100% load
3008
Output current relative (%) to
9906 MOTOR NOM CURR
Par. 3009
3007
3007
3008 ZERO SPEED LOAD have
I = output current
O
I = nominal motor current
N
f = break point frequency
BRK
A = trip time
0.4 0.6 0.8 1.0
Def
ZERO SPEED LOAD 100%
f
MOT LOAD CURVE 70%
MOT LOAD CURVE
35 Hz
3006 MOT THERM
A
60 s
90 s
180 s
300 s
600 s
∞
f /f
O BRK
1.2
Actual signals and parameters
109