Actual signals and parameters 251
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 nominal motor current, set parameter 3007 value to
91% (= 115/127·100%).
100%
50.…150% Allowed continuous motor load relative to the nominal motor
current
1 = 1%
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 as a
percentage of the nominal motor current
1 = 1%
All parameters
No. Name/Value Description Def/FbEq
100 =
127%
150
50
Par. 3007
Par. 3008
f
Output current relative (%) to
9906 MOTOR NOM CURR
Par. 3009
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