FIELD: electricity.
SUBSTANCE: reversible controlled electric connections are generated in the required areas of interruption for flow of short-circuit currents by placement of modules of a multimodule DC insert, besides, the required number of controlled links C and the number of modules m required for their formation are related by the following ratio: 
A multimodule DC insert comprises m converting modules, every of which represents a reversing controlled converting device of an alternating current or voltage into a direct one, each connected to their unit at the AC side, and at the DC side connected in parallel to the common DC buses.
EFFECT: reliability improvement.
2 cl, 3 dwg
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