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4.1.2
Temperature monitoring and thermal motor protection
4.1.2.1
Temperature monitoring circuits Temp-S and Temp-F
The stator segments are equipped with two subsequently described temperature monitoring
circuits – Temp-S and Temp-F.
● Temp-S activates the thermal motor protection when the motor windings are thermally
overloaded. In this case the precondition is that Temp-S is correctly connected and
evaluated. For a thermal overload, the drive system must bring the motor into a no-
current condition.
● Temp-F is used for temperature monitoring and diagnostics during commissioning and in
operation.
Both temperature monitoring circuits are independent of one another.
The TM120 Terminal Module evaluates the temperature sensor signals.
You can obtain commissioning information from Technical Support. Contact data is provided
in the introduction.
Temp-S
To protect the motor winding against thermal overload, all stator segments are equipped with
the following temperature monitoring circuit:
● 1 x PTC 130 °C temperature sensor per phase winding U, V and W, i.e. response
threshold at 130 °C
The three PTC temperature sensors of this temperature monitoring circuit are connected in
series to create a PTC triplet.
Figure 4-4
Every phase winding is monitored so that also uneven currents - and therefore the
associated different thermal loads of the individual phase windings - are detected. Different
thermal loads of the individual phase windings also occur for the subsequent operating
states while the motor is simultaneously generating a torque:
● Standstill
● When rotating very slowly
● Oscillation through a very small angle
1FW68 radial segment motors
Configuration Manual, 04/2017, 6SN1197-0AE02-0BP1
PTC triplet
Motor components and options
4.1 Motor components
67
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