Siemens SINAMICS G120 Operating Instructions Manual page 320
Low voltage converters
chassis devices with cu240b-2 and cu240e-2
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Also See for SINAMICS G120:
- List manual (1256 pages) ,
- Manual (732 pages) ,
- Operating instructions manual (550 pages)
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Advanced commissioning
6.23 Motor protection by calculating the temperature
Parameter Description
p0344
p0604
p0605
p0612
p0627
p0625
r0632
Further information is provided in the function charts 8016 and 8017 of the List Manual.
Thermal motor model 3 for encoderless synchronous motors
The thermal motor model 3 for encoderless synchronous motors 1FK7 or 1FG1 is a thermal
3-mass model, consisting of stator core, stator winding and rotor. Thermal motor model 3
calculates the temperatures - both in the rotor as well as in the stator winding.
Figure 6-60
Table 6-54
Parameter Description
r0034
r0063
r0068
p0610
320
Motor weight (for thermal motor type) (factory setting: 0.0 kg)
Mot_temp_mod 2/KTY alarm threshold (factory setting: 130.0°
C)
Motor temperature > p0604 ⇒ fault F07011.
Mot_temp_mod 1/2 threshold (factory setting: 145.0° C)
Motor temperature > p0605 ⇒ alarm A07012.
Mot_temp_mod activation
.01
1 signal: Activate motor temperature model 2 for induc‐
tion motors
.09
1 signal: Activate motor temperature model 2 expansions
The inverter sets bit 09 = 1 after commissioning. If you
load the parameter settings for firmware version ≤ V4.6
into the inverter, bit 09 = 0 remains.
Motor overtemperature, stator winding (factory setting: 80 K)
Motor ambient temperature during commissioning (factory setting: 20° C)
Specification of the motor ambient temperature in °C at the instant of the motor data iden‐
tification.
Mot_temp_mod stator winding temperature [°C]
Thermal motor model 3 for 1FK7 encoderless synchronous motors
Thermal motor model 3 for 1FK7 encoderless synchronous motors
CO: Thermal motor load [%]
CO: Actual speed value [rpm]
CO: Actual current value [A]
Motor overtemperature response (factory setting: 12)
0:
No response, alarm only, no reduction of I
1:
Messages, reduction of I
2:
Messages, no reduction of I
12:
Messages, no reduction of I
max
max
max
, temperature is saved
max
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2017, FW V4.7 SP6, A5E34259001B AD
After selecting an induc‐
tion motor (p0300) or a
listed induction motor
(p0301) during the com‐
missioning, the inverter
sets the parameters to
values appropriate for
the motor.
The parameters are
write-protected for listed
motors (p0301 ≥ 0).
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