ABB ACH550-02-645A-4 [251/454] Ach550 02 user s manual

ABB ACH550-02-645A-4 [251/454] Ach550 02 user s manual
Parameter listing and descriptions 247
ACH550-02 User's Manual
3007 MOT LOAD CURVE 50…150%
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 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%).
3008 ZERO SPEED LOAD 25…150%
Sets the maximum allowable current at zero speed.
Value is relative to 9906
MOTOR NOM CURR.
3009 BREAK POINT FREQ 1…250 Hz
Sets the break point frequency for the motor load curve.
Example: Thermal protection trip times when parameters 3006
MOT
THERM TIME, 3007 MOT LOAD CURVE and 3008 ZERO SPEED LOAD have
default values.
Code Description Range
Frequency
Output current relative
to 9906
MOTOR NOM CURR
150
100 =
50
P 3007
P 3008
P 3009
127%

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