| 摘要 |
The circuit is for at least one phase (R) with a first switch group system (1) for each phase with a first main switch group (4) with a controllable semiconducting power switch (2) and connected capacitor (3), an intermediate switch group (7) and a second main switch group (9). The controllable semiconducting power switches (2,8) of the first and second main switch groups are shut-off thyristors.
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