Thermal Motor Protection - Siemens SINAMICS S150 NEMA Operating Instructions Manual

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Thermal motor protection

The priority of thermal motor protection is to identify critical situations. Possible reactions can

be assigned (p0610) and used when alarm thresholds are exceeded to enable continued

operation (e.g., with reduced power) and prevent immediate shutdown.

● Effective protection is also possible without a temperature sensor (p0600 = 0 or

p4100 = 0). The temperatures of different motor components (stators, core, rotors) can be

determined indirectly using a temperature model.

● Connecting temperature sensors allows the motor temperature to be determined directly.

In this way, accurate start temperatures are available immediately when the motor is

switched on again or after a power failure.

Temperature sensor connection to customer terminal module TM31 (option G60)

Temperature measurement via KTY

The sensor is connected to terminals X522:7 (temp+) and X522:8 (temp-) on the customer

terminal module (-A60/-A65) in the forward direction of the diode. The measured tempera-

ture is limited to between -220 °F (-140 °C) and +371.5 °F (+188.6 °C) – and is made

available for further evaluation.

● Activate the motor temperature measurement via external sensor: p0600 = 10

After completion of commissioning, the source for the external sensor is set to the

customer terminal module (-A60/-A65) (p0603 = {TM31} r4105).

● Set the KTY temperature sensor type: p4100 = 2

Enclosed Drives

Operating Instructions, 12/2018, A5E36652151A

CO/BO: Control status word, current controller

Motor model speed threshold stall detection

Motor model error threshold stall detection

Motor model changeover speed encoderless operation

Motor model changeover speed hysteresis encoderless operation

Motor stalled delay time

Functions, monitoring and protective functions

9.5 Monitoring functions and protective functions