User manual

P3 Motor Overload Class Running QST 03, PFN 15
LED Display LCD Display
Range Off, 1– 40 (Default 10)
Description The Motor Running Overload Class parameter sets the class of the electronic overload for starting and
running. If separate starting versus running overload classes are desired, set the independent S\R O/L (P44 /
PFN13) parameter to "On".
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 7.1, for the overload trip time
versus current curves.
When the parameter is set to "Off", the electronic overload is disabled when up to speed and a separate motor
overload protection device must be supplied.
z NOTE: Care must be taken not to damage the motor when turning the running overload class off or setting
to a high value.
z NOTE: Consult motor manufacturer data to determine the correct motor overload settings.
See Also Independent Starting/Running Overload (P44 / PFN 13) on page 106.
Motor Starting Overload Class (P45 / PFN 14) on page 107.
Motor Overload Hot/Cold Ratio (P46 / PFN 16) on page 108.
Motor Overload Cooling Time (P47 / PFN 17) on page 109.
Relay Output Configuration (P52-54 / I/O 05 - 07) on page 112.
Theory of Operation section 7.1, Solid State Motor Overload Protection on page 132.
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6 - PARAMETER DESCRIPTION
PFN: Running OL
15 10
QST: Running OL
03 10