Siemens SINAMICS G120C Operating Instructions Manual page 341

Overload response for p0290 = 12
The converter responds in 2 stages:
1. If you operate the converter with increased pulse frequency setpoint p1800, then the
converter reduces its pulse frequency starting at p1800.
There is no current derating as a result of the higher pulse frequency setpoint.
Once the overload condition has been removed, the converter increases the pulse frequency
back to the pulse frequency setpoint p1800.
2. If it is not possible to temporarily reduce the pulse frequency, or the risk of converter thermal
overload cannot be prevented, then stage 2 follows:
– In vector control, the converter reduces the output current.
– In U/f control, the converter reduces the speed.
Once the overload condition has been removed, the converter re-enables the output current
or speed.
If both measures cannot prevent a power unit thermal overload, then the converter switches
off the motor with fault F30024.
Overload response for p0290 = 13
We recommend this setting for drives with a high starting torque.
If you operate the converter with increased pulse frequency, then the converter reduces its
pulse frequency starting at the pulse frequency setpoint p1800.
There is no current derating as a result of the higher pulse frequency setpoint.
Once the overload condition has been removed, the converter increases the pulse frequency
back to the pulse frequency setpoint p1800.
If it is not possible to temporarily reduce the pulse frequency, or the measure cannot prevent
a power unit thermal overload, then the converter switches off the motor with fault F30024.
Parameters
Number
r0036
r0037[0...19]
p0290
p0292[0...1]
p0294
SINAMICS G120C Converters
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK
8.23 Converter protection using temperature monitoring
Name
CO: Power unit overload I2t
Power unit temperatures
Power unit overload response
Power unit temperature alarm threshold
Power Module alarm for I2t overload
Advanced commissioning
Factory setting
%
°C
2
[0] 5 °C, [1] 15 °C
95%
339