246
Parameter listing and descriptions
ACH550-01 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.
Code Description
Range
Temp. rise
100%
63%
}
P 3006
Motor load
t
t
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