Thermistor (Fcp 106 Only); Frequency Converter/Options Selections; Remote Mounting Kit - Danfoss VLT DriveMotor FCM 106 Design Manual

System Integration

3.3.9.2 Thermistor (FCP 106 only)

The thermistor is positioned between motor windings. The
connection for the thermistor is placed in the motor plug:
terminal positions T1 and T2. For terminal positions and
wiring details, refer to the section Motor Connection in
®
VLT DriveMotor FCP 106 and FCP 106 Operating Instructions.
To monitor the thermistor, set parameter 1-90 Motor
Thermal Protection to [1] Thermistor Warning or [2]
Thermistor Trip.
R
(Ω)
4000
3000
1330
550
250
 nominel -5°C
-20°C
Illustration 3.6 Typical Thermistor Behaviour
The frequency converter trips when the motor temperature
increases the thermistor value above 2.9 kΩ. The frequency
converter is reactivated when the thermistor value
decreases below 0.8 kΩ.
OFF
ON
<800 Ω
Illustration 3.7 Frequency Converter Operation with
Thermistor
NOTICE
Select the thermistor according to the specification in
Illustration 3.6 and Illustration 3.7.
®
VLT DriveMotor FCP 106 and FCM 106 Design Guide
 [°C]
 nominel +5°C
 nominel
R
>2.9 kΩ
MG03M102 - 08/2015
NOTICE
If the thermistor is not galvanically isolated, then
interchanging the thermistor wires with the motor wires
may permanently damage the frequency converter.
A mechanical thermal switch (Klixon type) can be used
instead of a thermistor.
3.4 Frequency Converter/Options
Selections

3.4.1 Remote Mounting Kit

Illustration 3.8 Remote Mounting Kit Connections
3 3
29