Siemens SINAMICS S120 Function Manual page 355

Figure 8-3 Thermal motor monitoring synchronous motor
Thermal model parameters
● r0034 "Current motor load with active I2t motor model"
● p0611[0...n] "Winding time constant"
● p0615[0...n] "Trip limit motor overtemperature thermal model"
Drive functions
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Relation between I t motor model temperature and reference value p0605 (motor
2
overtemperature fault threshold)
Default: 0
Value range: 0 - 20000 s
The value is preset from the motor database or the SMI during commissioning.
The entry is linked to the motor code number.
It can also be specified for non-Siemens motors which require thermal model support.
The parameter is motor-specific.
Default: 180 °C
Value range: 0 °C to 220° C
The parameter is stored in the motor database. It is read from the motor data set or the
SMI during commissioning.
Its setting is linked to the motor code number.
Note about SMI:
If the trip threshold is not contained in the SMI, a default value of p0615 = 180 °C is
applied.
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Model
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Model
Monitoring and protective functions
8.5 Thermal motor monitoring
Model temperature
Sensor temperature
355