| 摘要 |
A gas-blast puffer type SF6 circuit-breaker exhibiting essentially features as follows: Dual-blast nozzle arrangement wherein a first nozzle being made of electrically conductive material, and a second nozzle being made of electrically insulating material; a movable compression cylinder of electrically insulating material bearing a tube-shaped contact piece intended for carrying mainly continuous current; a nozzle-shaped arcing contact piece connected mechanically rigid and electrically suitable for carrying current with said movable contact piece. The further improvement to said inventive concept characterize: A first compression cylinder of electrically insulating material surrounding temporarilly the nozzle arrangement and being engaged with a first fixed piston; a second compression cylinder of metal being engaged with a temporarilly catchable compression piston, both cylinders and pistons establishing a first and a second volume, said volumes communicating pneumatically with each other in a controllable manner, representing during an opening operation a high-performance gas compression system. In a third step of this systematic development the high-performance compression system is further improved to an impulse compression system by speeding up the movable constructural components of the circuit-breaker and setting in the main gas compression successively.
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