Siemens SINAMICS G130 Operating Instructions Manual page 487

Taking into account the ambient temperature
If, for thermal motor model 1, a temperature sensor has not been the parameterized, then
motor module 1 automatically uses an ambient temperature of 20 °C for the calculation. You
can enter one of these ambient temperatures deviating from the standard temperature as
follows:
1. Activate the setting p0612.12 = 1.
This enables parameter p0613.
2. The factory setting is 20 °C. If you wish to take into account an ambient temperature,
which deviates from the factory setting, in the motor model, then enter the expected
ambient temperature in p0613.
Note
When commissioning the motor, the setting p0612.12 = 1 is automatically activated. p0613
can be parameterized as required.
Thermal motor model 2 (for induction motors)
The thermal motor model 2 is deployed for induction motors. It is a thermal 3-mass model.
This makes thermal motor protection possible, even for operation without temperature
sensor or with the temperature sensor deactivated (p0600 = 0).
The thermal 3-mass model is activated with p0612.1 = 1. The total motor mass is entered in
p0344.
The 3-mass model splits up the total motor mass as follows:
● p0617 = thermally active iron mass (stator): laminated cores and frame as a percentage
of p0344
● p0618 = thermally active copper mass (stator: windings) as a percentage of p0344
● p0619 = thermally active rotor mass (rotor) as a percentage of p0344
● p0625 = ambient temperature
● p0626 = overtemperature, stator iron
● p0627 = overtemperature, stator winding
● p0628 = rotor winding temperature rise
Motor temperature rises are calculated on the basis of motor measured values. The
calculated temperature rises are indicated in the following parameters:
● r0630 Motor temperature model ambient temperature
● r0631 Motor temperature model stator iron temperature
● r0632 Motor temperature model stator winding temperature
● r0633 Motor temperature model rotor temperature
For operation with a KTY sensor, the calculated temperature value of the 3-mass model
permanently tracks the measured temperature value. After the temperature sensor is
switched off (p0600 = 0), the last temperature value continues to be used for calculation.
Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
Functions, monitoring, and protective functions
9.4 Monitoring and protective functions
487