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Trip Class
Application Description
5
Small fractional horsepower motors where acceleration times are almost
instantaneous or where extremely quick trip times are required
10
(
Fast Trip) Hermetic refrigerant motors, compressors, submersible
pumps and general-purpose motors that reach rated speed in less than 4
seconds.
15
Specialized applications.
20
(Standard Trip) Most NEMA-rated general-purpose motors will be
protected by this setting.
30
(Slow Trip) Motors with long acceleration times (>10 seconds) or high
inertia loads.
J Prefix
Programming any of the trip classes with the J prefix will enable jam
protection. This additional protection is enabled 1 minute after the motor
starts and provides a 2 second trip time for motors exceeding 400% of
the OC setting, regardless of trip class.
Table 2: Trip Class Descriptions
Figure 4: Overload Trip Curves
