Siemens SINAMICS G130 Engineering Manual page 73

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If it is acceptable to operate the DC link at reduced power if an Active Infeed fails, each Active Infeed can be
dimensioned for the respective proportion of the full infeed current, taking into account a current derating of
5% with respect to the rated current. If the full infeed power is required if an Active Infeed fails, each of the
Active Infeeds and associated transformers must be overdimensioned accordingly.
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The Active Line Modules that remain in operation if a fault occurs must, in conjunction with the Active
Interface Modules, be able to precharge the complete common DC link capacitance.
Fundamental Principles and System Description
Engineering Information
SINAMICS Engineering Manual - May 2008
© Siemens AG
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