GE 269Plus Instruction Manual page 114

OVERLOAD CURVE SETPOINTS
If the standard curves do not sufficiently match the motor data, the 269Plus allows for the creation of a custom
overload curve. Motors with non-standard overload charactersitics can be fully protected since almost any
curve shape can be entered. The 269Plus accepts 22 points and will internally form a smooth curve through
these points. If the custom curve requires a discontinuity (shown in B below), the 269Plus will insert it at the
appropriate place. A discontinuity occurs when a time entered is greater than the time entered for the previous
overload level. Examples of custom curves and breakpoints are shown below:
smooth
A:
curve
3
B:
discontinuity
3-
58
Courtesy of NationalSwitchgear.com
Figure 3–6: CUSTOM CURVE EXAMPLES
269Plus Motor Management Relay
3 SETUP AND USE
GE Power Management