Protecting The Motor By Calculating The Motor Temperature - Siemens SINAMICS G120D Series Operating Instructions Manual

Advanced commissioning
7.6 Protection functions
Setting parameters for the temperature monitoring
Parameter
p0335
p0601
p0604
p0605
p0610
p0640
Additional information on the motor temperature monitoring can be found in function diagram
8016 of the List Manual.
7.6.3

Protecting the motor by calculating the motor temperature

The temperature calculation is only possible in the vector-control control mode (p1300 ≥ 20)
and functions by calculating using a thermal motor model.
Table 7- 22
Parameter
p0601
p0604
p0605
172
Description
Specify the motor cooling
0: Natural cooling - with fan on the motor shaft (factory setting)
1: Forced ventilation - with a separately driven fan
2: Liquid cooling
128: No fan
Motor-temperature sensor type
0: No sensor (factory setting)
1: PTC (→ p0604)
2: KTY84 (→ p0604, p0605)
4: Temperature switch
Motor temperature alarm threshold (factory setting 130° C)
Motor temperature fault threshold (factory setting 145° C)
Setting for KTY84 sensor. The parameter has no significance for a PTC sensor.
Motor overtemperature response (factory setting: 12)
Determines the behavior as soon as the motor temperature reaches the warning
threshold p0604.
0: Alarm (A07910), no fault.
1: Alarm (A07910); the converter reduces the current limit and starts the timer.
Shutdown with fault (F07011).
2: Alarm (A07910); the converter starts the timer. Shutdown with fault (F07011).
12: As for 2, but the converter considers the last shutdown temperature to calculate
the motor temperature.
Current limit (input in A)
Parameters for temperature acquisition without using a temperature sensor
Description
Motor temperature sensor sensor type (factory setting: 0)
0: No sensor
Mot_temp_mod 2/KTY Warning threshold (factory setting: 130 °C)
Threshold for monitoring the motor temperature.
After exceeding the threshold, the inverter reports fault F07011.
Mot_temp_mod 1/2 Threshold (factory setting: 145 °C)
Timer for monitoring the motor temperature in motortemperature model 2.
The inverter starts the timer when the temperature warning threshold is exceeded
(p0604).
Converter with control units CU240D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34262100B AB