ABB ACH550 Bedienungsanleitung Seite 244

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Seitenansicht 243
240 Parameter listing and descriptions
ACH550 User's Manual
3006 MOT THERM TIME 0...2
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:
MOTOR THERM TIME equals 35
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.
3007 MOT LOAD CURVE 256...9999 s
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
MOTOR NOM CURRENT.
Adjust the load curve level if the ambient temperature differs from
nominal.
3008 ZERO SPEED LOAD 50...150%
Sets the maximum allowable current at zero speed.
Value is relative to 9906
MOTOR NOM CURR.
Code Description Range
Temp. Rise
100%
63%
t
t
}
P 3006
Motor load
Frequency
Output current (%) relative
to 9906
MOTOR NOM CURR
150
100
50
P 3007
P 3008
P 3009
00Template.book Page 240 Friday, January 2, 2004 2:55 PM
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