Thermal Motor Protection; Description; Temperature Sensor Connection At The Customer Terminal Block Tm31 (Option G60) - Siemens SINAMICS G150 Operating Instructions Manual

9.4.5

Thermal motor protection

9.4.5.1

Description

Description
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
● Connecting temperature sensors allows the motor temperature to be determined directly.
9.4.5.2

Temperature sensor connection at the customer terminal block TM31 (option G60)

Temperature measurement via KTY
The device is connected to terminals X522:7 (Temp+) and X522:8 (Temp-) on the customer
terminal block (TM31) in the forward direction of the diode. The measured temperature is
limited to between –140 °C up to +188.6 °C and is available for further evaluation.
● Activating the motor temperature measurement via the external sensor: p0600 = 10
● Set the KTY temperature sensor type: p4100 = 2
Temperature measurement via PTC
The device is connected to terminal X522:7/8 at the customer terminal block (TM31). The
threshold for switching to an alarm or fault is 1650 Ω. If the threshold is exceeded, the
system switches internally from an artificially generated temperature value of -50 °C to +250
°C and makes it available for further evaluation.
● Activating the motor temperature measurement via the external sensor: p0600 = 10
● Set the PTC temperature sensor type: p4100 = 1
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A
p4100 = 0). The temperatures of different motor components (stators, core, rotors) can be
determined indirectly using a temperature model.
In this way, accurate start temperatures are available immediately when the motor is
switched on again or after a power failure.
If the customer terminal block TM31 (option G60) is present and on completion of
commissioning, the source for the external sensor is set to the customer terminal block
(p0603 = {TM31} r4105).
If the customer terminal block TM31 (option G60) is present and on completion of
commissioning, the source for the external sensor is set to the customer terminal block
(p0603 = {TM31} r4105).
Functions, Monitoring, and Protective Functions
9.4 Monitoring and protective functions
501