Siemens SINAMICS G120 Operating Instructions Manual page 326

Advanced commissioning
6.28 Motor protection with temperature sensor
PTC sensor
The inverter interprets a resistance > 1650 Ω as being an overtemperature and responds
according to the setting for p0610.
The inverter interprets a resistance < 20 Ω as being a short-circuit and responds with alarm
A07015. If the alarm is present for longer than 100 milliseconds, the inverter shuts down with
fault F07016.
Pt1000 sensor
Using a Pt1000 sensor, the inverter monitors the motor temperature and the sensor itself for
wire breakage and/or short-circuit:
● Temperature monitoring:
Using a Pt1000 sensor, the inverter evaluates the motor temperature in the range from
-48 °C ... +248 °C.
You set the temperature for the alarm and fault thresholds using parameters p0604 and
p0605.
– Overtemperature alarm (A07910):
– Overtemperature fault (F07011):
● Sensor monitoring (A07015 or F07016):
– Wire-break:
– Short-circuit:
Setting parameters for the temperature monitoring
Parameter
p0335
p0601
p0604
326
- motor temperature > p0604 and p0610 = 0
The inverter responds with a fault in the following cases:
- motor temperature > p0605
- motor temperature > p0604 and p0610 ≠ 0
The inverter interprets a resistance > 2120 Ω as a wire-break and outputs the alarm
A07015. After 100 milliseconds, the inverter changes to the fault state with F07016.
The inverter interprets a resistance < 603 Ω as a short-circuit and outputs the alarm
A07015. After 100 milliseconds, the inverter changes to the fault state with F07016.
Description
Motor-cooling method (factory setting: 0)
0: Natural cooling - with fan on the motor shaft
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
2: KTY84
4: Temperature switch
6: Pt1000
Mot_temp_mod 2 / sensor alarm threshold (factory setting 130° C)
For monitoring the motor temperature using KTY84/Pt1000.
Converter with the CU230P-2 Control Units
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE