Thermal Motor Protection - Siemens SINAMICS S120 Commissioning Manual

Temperature sensors and electrical wiring
The temperature sensors can be evaluated, for example, as follows:
● Temperature sensor
● Temperature switch
See also: Configuration Manual for Linear Motors 1FN3 or 1FN6
Risk of electric shock
When connecting-up the temperature monitoring circuits, carefully observe the
requirements regarding protective separation in accordance with EN 61800-5-1.
For additional information, refer to the Configuration Manual of the 1FN1, 1FN3 or 1FN6
linear motors.
2.12.4

Thermal motor protection

Temperature monitoring circuits Temp-F and Temp-S
The motors are supplied with two temperature monitoring circuits: Temp - F and Temp - S.
Temp-F is to monitor and evaluate the temperature characteristic in the motor being used.
Temp-S is used to activate the motor protection in the event of overheating in the motor
windings.
Both temperature monitoring circuits are independent of each other. The evaluation is
realized via the Control Unit. The temperature sensors are connected to the drive system or
to the Motor Module using Sensor Modules from the SME12x series.
Temp-F (KTY 84 Sensor)
The temperature monitoring circuit Temp-F consists of a KTY 84 temperature sensor located
at the coils. Under certain circumstances – for example when the individual phases have
different current levels – this can mean that the maximum temperature of the three phase
windings is not Detective. Therefore, it is not permissible for motor protection to solely
evaluate the Temp-F temperature monitoring circuit. Temp-F is used to monitor the
temperature - and if necessary to output an alarm indicating that the drive is being shutdown
because the Temp-S temperature monitoring circuit has responded.
Commissioning Manual
Commissioning Manual, (IH1), 01/2013, 6SL3097-4AF00-0BP3
– Motor 1: Connection via SME12x and evaluation via the drive control
– Motor n: not connected
(short-circuited and connected to the PE)
– Motor 1 to n: Evaluation via the drive control
WARNING
2.12 Notes on commissioning linear motors
Commissioning
157