Siemens SINAMICS G120XA, Operating Instructions Manual, Page: 873 / 918

11.6 Low frequency performance
The converter can only be operated with reduced output current at low output frequencies.
NOTICE
Reduced converter service life as a result of overheating
Loading the converter with a high output current and at the same time with a low output
frequency can cause the current-conducting components in the converter to overheat.
Excessively high temperatures can damage the converter or reduce the converter service life.
● Never operate the converter continuously with an output frequency = 0 Hz.
● Only operate the converter in the permissible operating range.
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● Continuous operation (green area in the figure)
Operating state that is permissible for the complete operating time.
● Short-time duty (yellow area in the figure)
Operating state that is permissible for less than 2% of the total operating time.
● Sporadic short-time duty (red area in the figure)
Operating state that is permissible for less than 1% of the total operating time.
Technical data
11.6 Low frequency performance
SINAMICS G120XA converter
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
871