CHAPTER 5: SETTINGS GROUPED ELEMENTS
M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 5-199
5
Figure 5-101: Standard motor curves
During the interval of discontinuity, the longer of the two trip times is used to reduce the chance of nuisance tripping
during motor starts.
In some applications, the shape of the motor thermal damage curve substantially deviates from the standard.
Furthermore, the characteristics of the starting (locked rotor and acceleration) and running thermal damage curves may
not correspond smoothly. In these cases, it can be necessary to use a custom curve so the motor can be started
successfully and used to its full potential without compromising protection. For these conditions, it is recommended that
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