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:
Set Par. 1-90
Motor Thermal Protection
to
Thermistor Trip
[2]
Set Par. 1-93
Thermistor Source
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. 1-90
Motor Thermal Protection
to
Thermistor Trip
[2]
Set Par. 1-93
Thermistor Source
to
Digital Input 33
[6]
VLT
®
HVAC Drive Programming Guide 3. Parameter Description
MG.11.C5.02 - VLT
®
is a registered Danfoss trademark
47
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