Technical information

5 – PARAMETER DESCRIPTIONS
42
P3 Motor Running Overload Class QST 03, PFN 14
LCD Display
QST: Running OL
03 10
PFN: Running OL
14 10
Range OFF, 1– 40 (Default 10)
Description The Motor Running Overload Class parameter sets the class for starting and running if the
Independent Starting/Running Overload parameter is set to OFF. If separate starting versus running
overload classes are desired, set the Independent Starting/Running Overload parameter to On.
The Motor Running Overload Class parameter sets the class of the electronic overload when up to
speed and stopping. The starter stores the thermal overload value as a percentage value between 0
and 100%, with 0% representing a “cold” overload and 100% representing a tripped overload. See
section 8.1, Solid State Motor Overload Protection for the overload trip time versus current curves.
When the Motor Running Overload Class parameter is set to OFF, the electronic overload is disabled
when up to speed and a separate motor overload protection device must be supplied.
NOTE: Care must be taken not to damage the motor when turning the running overload class off or
setting a high value.
NOTE: Consult motor manufacturer data to determine the correct motor overload settings.
See Also Independent Starting/Running Overload parameter on page 65
Motor Starting Overload Class parameter on page 66
Motor Overload Hot/Cold Ratio parameter on page 67
Motor Overload Cooling Time parameter on page on page 68
Relay Output Configuration parameter on page 70
Theory of Operation section 8.1, Solid State Motor Overload Protection, on page 110