EP 0239932 B1 19910116 - HIGH-TENSION GAS BLAST CIRCUIT BREAKER
Title (en)
HIGH-TENSION GAS BLAST CIRCUIT BREAKER
Publication
Application
Priority
FR 8604606 A 19860401
Abstract (en)
[origin: US4754109A] A compressed dielectric gas high-tension circuit breaker comprising: a fixed assembly comprising main contacts and arcing contacts; a moving assembly comprising main contacts and arcing contacts; a blast chamber comprising a piston which moves on separation of the contacts to urge compressed blast gas towards a blast nozzle situated in the zone where an arc is struck; and a thermal volume; wherein the thermal volume is in communication with the downstream portion of the blast nozzle via channels and passages extending the path between the thermal volume and said nozzle, said communication being closed by a calibrated non-return valve which opens only when the pressure in said channels and in said passage reaches a threshold value, said non-return valve closing the passage between the blast chamber and the nozzle when said communication is opened.
IPC 1-7
IPC 8 full level
H01H 33/88 (2006.01); H01H 33/90 (2006.01); H01H 33/915 (2006.01); H01H 33/985 (2006.01)
CPC (source: EP US)
H01H 33/901 (2013.01 - EP US); H01H 2033/902 (2013.01 - EP US); H01H 2033/908 (2013.01 - EP US)
Citation (examination)
FR 2356258 A1 19780120 - SPRECHER & SCHUH AG [CH]
Designated contracting state (EPC)
BE CH DE ES FR GB GR IT LI LU NL
DOCDB simple family (publication)
EP 0239932 A1 19871007; EP 0239932 B1 19910116; BR 8701457 A 19880105; CN 1005942 B 19891129; CN 87102445 A 19871014; DE 3767340 D1 19910221; DK 163087 A 19871002; DK 163087 D0 19870331; DK 168777 B1 19940606; ES 2019593 B3 19910701; FR 2596574 A1 19871002; FR 2596574 B1 19880520; GR 3001705 T3 19921123; IE 60331 B1 19940629; IE 870832 L 19871001; JP 2514030 B2 19960710; JP S62237626 A 19871017; PT 84595 A 19870401; PT 84595 B 19891130; US 4754109 A 19880628
DOCDB simple family (application)
EP 87104480 A 19870326; BR 8701457 A 19870331; CN 87102445 A 19870401; DE 3767340 T 19870326; DK 163087 A 19870331; ES 87104480 T 19870326; FR 8604606 A 19860401; GR 910400418 T 19910401; IE 83287 A 19870331; JP 8084387 A 19870331; PT 8459587 A 19870331; US 3267787 A 19870401