Functional Software description
DCS 500 Software Description 73
0.5 1.0 5.0 10 100
100
120
140
160
180
200
240
260
Current
Id/ %
Time
mi
Figure 50 Example of motor loadability curve.
Note
. This is an example and does not necessarily
correspond to any actual motor.
Example:
The drive should trip if motor current rises above 170% of motor
nominal current for a time longer than 1 minute. Motor’s preload is
50% of nominal armature current. See the following figure. Pa-
rameter MODEL1.TC (1409) value is 150.
Selected tripping base level is 106%. MODEL1.TRIP L (1408) =
106
2
/100 = 102.
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