ABB ACH550-01, Руководство пользователя

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238 Parameter listing and descriptions
ACH550 User's Manual
3006 MOT THERM TIME 256…9999 s
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 50…150%
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 25…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