ABB DriveIT ACH550-01 User Manual page 244

Code Description
3006 MOT THERM TIME
Sets the motor thermal time constant for the motor temperature
model.
• This is the time required for the motor to reach 63% of the final
temperature with steady load.
• For thermal protection according to UL requirements for NEMA
class motors, use the rule of thumb:
times t6, where t6 (in seconds) is specified by the motor
manufacturer as the time that the motor can safely operate at six
times its rated current.
• The thermal time for a Class 10 trip curve is 350 s, for a Class 20
trip curve 700 s, and for a Class 30 trip curve 1050 s.
Motor load
Temp. Rise
100%
63%
3007 MOT LOAD CURVE
Sets the maximum allowable operating load of the motor.
• When set to 100%, the maximum allowable load is equal to the
value of Start-up Data parameter 9906
• Adjust the load curve level if the ambient temperature differs from
nominal.
3008 ZERO SPEED LOAD
Sets the maximum allowable current at zero speed.
• Value is relative to 9906
240
P 3006
150
100
P 3007
50
P 3008
MOTOR NOM CURR
Parameter listing and descriptions
ACH550 User's Manual
Range
0...2
MOTOR THERM TIME
t
t
256...9999 s
MOTOR NOM CURRENT
Output current (%) relative
to 9906
MOTOR NOM CURR
P 3009
50...150%
.
equals 35
.
Frequency