SEL-701-1 Monitor
Date Code 20011009
Motor Thermal Element
Introduction
E.2
Weights the heating effects of positive- and negative-sequence current
equally when the motor is starting.
Models the heat lost to the surroundings when the motor is running.
Compares the present heat estimate to a starting trip threshold or a
running trip threshold, depending on the state of the motor.
Provides a trip output if the present heat estimate exceeds the present
trip threshold.
Provides an alarm output if the present heat estimate exceeds the
present alarm threshold (user settable as a percentage of the trip
threshold).
Adjusts the present trip threshold based on RTD ambient temperature
measurement when enabled.
Summary of Contents for SEL-701-1
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