| 摘要 |
The gas-blast circuit breaker which is preferably provided for switching medium voltages has in each case two erosion contacts (8, 10) and rated-current contacts (7, 9) which are located in a housing (1) filled with insulating gas and interact with one another. In order to achieve a compact construction, current connections (5, 6) are passed to the interior of the housing (1) transversely with respect to the movement direction of a moving erosion contact (8) of the two erosion contacts (8, 10). In the case of this gas-blast circuit breaker, it is intended to keep the drive energy required for a switching process as low as possible, while maintaining the compact construction. This is achieved in that the moved rated-current contact (7) is supported such that it can rotate, and in that a drive which acts on the moving erosion contact (8) and on the moving rated-current contact (7) has two insulating material rods (17, 18) which are articulated on a drive crank (20), and one of which is articulated on the moving erosion contact (8) and the other on the moving rated-current contact (7). At the same time, the two insulating rods (17, 18) are articulated on the drive crank (20) in such a manner that, a thrust crank, which is formed by the drive crank (20), the one insulating material rod (17) and the moving erosion contact (8) passes through a dead point (21) before reaching the switched-off state. <IMAGE>
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