ABB ACH550-01 User Manual page 252

ACH550-01 User's Manual
Code Description
3007 MOT LOAD CURVE
Sets the maximum allowable operating load of the motor.
• With the default value 100%, motor overload protection is functioning
when the constant current exceeds 127% of the parameter 9906
MOTOR NOM CURR
• 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%).
3008 ZERO SPEED LOAD
Sets the maximum allowable current at zero speed.
• Value is relative to 9906
3009 BREAK POINT FREQ
Sets the break point frequency for the motor load curve.
Example: Thermal protection trip times when parameters 3006
, 3007
THERM TIME
default values.
Parameter listing and descriptions
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value.
Output current relative
to 9906
150
P 3007 100 =
127%
P 3008 50
MOTOR NOM CURR
MOT LOAD CURVE
Range
50...150%
MOTOR NOM CURR
Frequency
P 3009
25...150%
.
1...250 Hz
and 3008
ZERO SPEED LOAD
MOT
have
247