5-200 M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
GROUPED ELEMENTS CHAPTER 5: SETTINGS
5
the FlexCurves be used. FlexCurves allows the user to program selected trip times for pre-determined current levels. As
seen in the following figure, if the running (2) and the locked rotor thermal limit curves were smoothed into one standard
overload curve, the motor cannot start at 80% line voltage. A custom curve (1) is required.
For high inertia load applications (when the
VOLTAGE DEPENDENT FUNCTION is enabled), the locked rotor thermal limit
section of the programmed motor or the FlexCurve overload curve is modified and becomes dynamically adaptive to
system voltage changes. This function is explained later in this section.
Figure 5-102: FlexCurve example
The FlexCurve programming is based on per-unit current values. The equivalent primary amperes and multiplier of full load
current are also indicated above.
To Next Page
Loading...
