701 Motor Protection Relay Date Code 20010719
Motor Thermal Element
Introduction
E.2
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.
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