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
.
1330
550
250
-20°C
175HA183.10
4000
3000
R
(Ω)
nominel
nominel -5°C
nominel +5°C
[°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.
195NA439.10
R
OFF
ON
<800 Ω
>2.9 kΩ
Illustration 3.7 Frequency Converter Operation with
Thermistor
NOTICE
Select the thermistor according to the specification in
and
.
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
195NA431.10
Illustration 3.8 Remote Mounting Kit Connections
System Integration
VLT
®
DriveMotor FCP 106 and FCM 106 Design Guide
MG03M102 -
08/2015
29
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