Motor components and options
4.1 Motor components
1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA
77
The following diagram shows the resistance characteristic as a function of the temperature
for KTY 84-130 and Pt1000 temperature sensors.
Figure 4-3 Comparison of KTY 84-130 and Pt1000 temperature sensors
The prewarning signal from the evaluation circuit in the SINAMICS drive converter can be
externally evaluated.
You can find the designation of the interface for connecting the temperature sensors in
Chapter "Connecting temperature sensors (Page 308)".
Destruction of the motor for a thermal critical load
A thermally critical load, e.g. high overload when the motor is stationary, can destroy the
motor.
• Employ additional protective measures, e.g. an overcurrent relay.
Destruction of the temperature sensor if the insulation resistance is tested improperly
If the test voltage is connected to only one temperature sensor terminal, the temperature
sensor will be destroyed.
• Short-circuit ends of the temperature sensor cables before applying the test voltage.
High short-term overload conditions require additional protective measures as a result of the
thermal coupling time of the temperature sensor.
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