GE AF-600 FP Design Manual page 43

The thermistor cut-out value is > 3 kΩ.
Integrate a thermistor (PTC sensor) in the motor for winding protection.
Motor protection can be implemented using a range of techniques: PTC sen-
2
sor in motor windings; mechanical thermal switch (Klixon type); or Electronic
Thermal Electronic Thermal Overload.
Using a digital input and 24 V as power supply:
Example: The frequency converter trips when the motor temperature is too
high.
Parameter set-up:
Set par. F-10 Electronic Overload to Thermistor Trip [2]
Set par. F-12 Motor Thermistor Input to Digital Input 33 [6]
Using a digital input and 10 V as power supply:
Example: The frequency converter trips when the motor temperature is too
high.
Parameter set-up:
Set par. F-10 Electronic Overload to Thermistor Trip [2]
Set par. F-12 Motor Thermistor Input to Digital Input 33 [6]
Using an analog input and 10 V as power supply:
Example: The frequency converter trips when the motor temperature is too
high.
Parameter set-up:
Set par. F-10 Electronic Overload to Thermistor Trip [2]
Set par. F-12 Motor Thermistor Input to Analog Input 54 [2]
Do not select a reference source.
Input
Digital/analog
Digital
Digital
Analog
42
Supply Voltage
Volt
24 V
10 V
10 V
Threshold
Cut-out Values
< 6.6 kΩ - > 10.8 kΩ
< 800Ω - > 2.7 kΩ
< 3.0 kΩ - > 3.0 kΩ
AF-600 FP Design Guide