Danfoss VLT AQUA Programming Manual page 54

2. Parameter Description
[2]
2
54
Thermistor trip Stops (trips) the frequency converter when the connected ther-
mistor in the motor reacts in the event of motor over-tempera-
ture.
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 techni-
ques: 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 tem-
perature is too high.
Parameter set-up:
Set Par. 1-90
Set Par. 1-93
Using a digital input and 10 V as power supply:
Example: The frequency converter trips when the motor tem-
perature is too high.
Parameter set-up:
Set Par. 1-90
Set Par. 1-93
MG.20.O2.02 - VLT
®
VLT
Motor Thermal Protection
Thermistor Source Digital Input 33
to
Motor Thermal Protection
Thermistor Source to Digital Input 33
®
is a registered Danfoss trademark
AQUA Drive Programming Guide
Thermistor Trip
to [2]
[6]
Thermistor Trip
to [2]
[6]