| 摘要 |
Circuit breaker comprising two contacts (1, 2), a pressurization chamber (5), a nozzle arrangement (6) designed to blow an arc (8) in a quenching region (3), with a narrowest passage of a pressurization chamber outflow channel (71) to be passed by outflowing quenching gas (4) defining a pressurization chamber outflow limiting area Apc, a narrowest passage of a nozzle channel (63) to be passed by outflowing quenching gas (4) defining a nozzle outflow limiting area A n, the smaller area of which defining an absolute outflow limiting area A,with quenching gas (4) having a global warming potential lower than the one of SF 6 over an interval of 100 years; characterized by equation V/A = k.csound (T=300K), with V =total volume of pressurization chamber (5), A=absolute outflow limiting area, csound (T=300K) =speed of sound of quenching gas (4) at 300 K, and 5 ms =< k =< 25 ms. |
