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1. (WO2013153110) CIRCUIT BREAKER

Pub. No.:    WO/2013/153110    International Application No.:    PCT/EP2013/057483
Publication Date: Fri Oct 18 01:59:59 CEST 2013 International Filing Date: Thu Apr 11 01:59:59 CEST 2013
IPC: H01H 33/70
H01H 33/76
H01H 33/82
H01H 33/91
Applicants: ABB TECHNOLOGY AG
Inventors: STOLLER, Patrick
SEEGER, Martin
IORDANIDIS, Arthouros
WÜTHRICH, Benjamin
Title: CIRCUIT BREAKER
Abstract:
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.