| 摘要 |
In order to provide an apparatus (13) for switching direct currents in branches of a DC voltage grid node with a first disconnection branch (14) in which a power switching unit (18) is arranged which has a series circuit comprising two-pole submodules comprising at least one power semiconductor switch (9) which can be switched on and off, an operating current branch (15a) which can be connected in parallel with the disconnection branch (8) and in which a mechanical switch (5) is arranged and which is connectable to a branch of the DC voltage grid node, and commutation means (6) for commutating the direct current from the operating current branch into the disconnection branch, which apparatus can be used, inexpensively, in particular in branches of a DC voltage grid node, it is proposed that at least one further operating current branch (15b) is provided, which can be connected in parallel with the first disconnection branch (15a), wherein each operating current branch (15) can be connected in parallel with the disconnection branch (14) via a paralleling switch (16). |
