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

8.6.3

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 8- 19
Parameter
p0601
p0604
p0605
p0610
p0611
p0612
p0615
Converter with control units CU240D-2
Operating Instructions, 04/2014, FW V4.7, A5E34262100B AA
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).
Motor overtemperature response (factory setting: 12)
Determines the behavior as soon as the motor temperature reaches the warning
threshold p0604.
0: Warning (A07910), no fault.
1: Warning (A07910); current limit will be reduced and timer started. Shutdown
with fault (F07011).
2: Warning (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).
I2t motor model thermal time constant (factory setting: 0 s)
The parameter is only effective for synchronous motors.
On selecting a motor from the motor list (p0301), the inverter sets up the parameter
value automatically.
Mot_temp_mod activation
.00 1 signal: Activate motor temperature model 1 (I2t) for permanently excited
synchronous motors
.01 1 signal: Activate motor temperature model 2 for asynchronous motors
.02 1 signal: Activate motor temperature model 3 for 1FK7 encoderless
synchronous motors
.09 1 signal: Activate motor temperature model 2 expansions
Mot_temp_mod 1 (I2t) Interference threshold (factory setting: 180 °C)
Interference threshold for monitoring the motor temperature in motortemperature
model 1.
After exceeding the interference threshold, the inverter reports fault F07011.
8.6 Protection and monitoring functions
Setting functions
151