Danfoss VLT FC 100 Series Programming Manual page 47

®
VLT HVAC Drive Programming Guide
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 sensor in motor windings; mechanical
thermal switch (Klixon type); or Electronic Thermal Relay (ETR).
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:
Motor Thermal Protection
Set Par. 1-90
Thermistor Source Digital Input 33
Set Par. 1-93 to
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:
Motor Thermal Protection
Set Par. 1-90
Thermistor Source Digital Input 33
Set Par. 1-93 to
MG.11.C5.02 - VLT ® is a registered Danfoss trademark
3. Parameter Description
Thermistor Trip
to [2]
[6]
Thermistor Trip
to [2]
[6]
3
47