| 摘要 |
The compressed gas-blast circuit breaker includes two moving contact members (1, 2) which are guided such that they move counter to one another along an axis (3) in a chamber which is filled with insulating gas. These contact members each have an erosion contact (8, 9) and a rated current contact (6, 7). An insulating nozzle (10) is mounted on a contact member (1) which is moved directly by a drive, and compressed gas is passed, during disconnection through the constriction (11) in said insulating nozzle (10) from a pressure space (12), which is independent of the switching travel, and/or a compression space (19), which is operated by the contact members, into an exhaust space (14). Drive force is passed to a contact member (2), which absorbs force, from the directly driven contact member (1), via an insulating part and a speed converter. Such a circuit breaker requires a small amount of drive energy and has a compact, cost-effective design. During disconnection, if the functionally essential parts of the force-absorbing contact member (2), such as the erosion contact (9), the rated current contact (7) and the shields, are suitably driven, it forms an insulating path, which can be highly stressed dielectrically, in a short time while optimally using a comparatively small drive force.
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