Actual signals and parameters 241
All parameters No. Name/Value 3007 MOT LOAD CURVE
Description Def/FbEq Defines the load curve together with parameters 3008 100% 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%).
150 Par. 3007
100 = 127%
Par. 3008
50
Output current relative (%) to 9906 MOTOR NOM CURR
f Par. 3009 50.…150% 3008 ZERO SPEED LOAD 25.…150%
Allowed continuous motor load relative to the nominal motor 1 = 1% current Defines the load curve together with parameters 3007 MOT 70% LOAD CURVE and 3009 BREAK POINT FREQ. Allowed continuous motor load at zero speed in percent of 1 = 1% the nominal motor current