Technical information

5 – PARAMETER DESCRIPTIONS
68
P38 Motor Overload Cooling Time PFN 16
LCD Display
PFN:OL Cool Tim
16 30.0 min
Range 1.0 –999.9 minutes (Default 30.0)
Description The Motor Overload Cooling Time parameter is the time to cool from 100% to less than (<) 1%.
When the motor is stopped, the overload content reduces exponentially based on Motor Overload
Cooling Time parameter.
Refer to the following equation:
t
e
eCoolingTim
5
* Stoppeden Content wh OL Content OL =
So, a motor with a set cooling time of 30 minutes (1800 sec) with 100% accumulated OL content
cools to <1% OL content in 30 minutes.
NOTE: Consult motor manufacturer data to determine the correct motor overload setting.
See Also Motor Overload Hot/Cold Ratio parameter on page 67
Independent Starting/Running Overload parameter on page 65
Motor Running Overload Class parameter on page 42
Motor Starting Overload Class parameter on page 66
Theory of Operation section 8.1.8, Motor Cooling While Stopped, on page 115
Theory of Operation section 8.1.9, Motor Cooling While Running, on page 116