Protecting The Motor By Calculating The Motor Temperature - Siemens SINAMICS G120 Original Instructions Manual

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.
8.6.3

Protecting the motor by calculating the motor temperature

The temperature calculation is only possible in the vector control mode (p1300 ≥ 20) and
functions by calculating a thermal motor model.
Table 8- 22
Parameter
p0621= 1
p0622
p0625 = 20
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
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
Determines the response when the motor temperature reaches the alarm threshold
p0604.
0: Alarm (A07910), no fault.
1: Alarm (A07910); current limit is reduced and timer is started. Shutdown with fault
(F07011).
2: Alarm (A07910); timer is started. Shutdown with fault (F07011).
12: As for 2 but the last shutdown temperature is used to calculate the motor
temperature (factory setting).
Current limit (input in A)
Parameters for temperature acquisition without using a temperature sensor
Description
Motor-temperature acquisition after restart
0: No temperature measurement (factory setting)
1: Temperature measurement after the motor is switched on for the first time
2: Temperature measurement each time that the motor is switched on
Magnetization time of the motor for temperature measurement after starting
automatically as the result of motor data identification)
Ambient motor temperature
Enter the ambient motor temperature in °C at the instant that the motor data is
acquired (factory setting: 20 °C).
The difference between the motor temperature and motor environment (p0625) must
lie within a tolerance range of approx. ± 5 °C.
Setting functions
8.6 Protection functions
(set
263