EP 0239068 B1 19920520 - GAS BLAST SWITCH
Title (en)
GAS BLAST SWITCH
Publication
Application
Priority
FR 8604393 A 19860326
Abstract (en)
[origin: US4774388A] A compressed gas dielectric circuit breaker comprising fixed main contacts (11), fixed arcing contacts (8A), a moving assembly comprising main contacts (21) and arcing contacts (22A), a blast device comprising a semi-moving cylinder (16) divided into first and second chambers (15, 35) by a fixed piston (3B), with the first chamber (15) communicating with a blast nozzle (12), and a thermal volume (9) opening out into the zone where the fixed arcing contacts (8A) separate from the arcing contacts (22A) of the moving assembly, communication (26) being established between the thermal volume (9) and said second chamber (35) in order to enable gas heated by the arc in the thermal volume to increase in pressure and to assist in the displacement of the cylinder (16) and thus in the compression of the gas in the first chamber (15).
IPC 1-7
IPC 8 full level
H01H 33/88 (2006.01); H01H 33/90 (2006.01); H01H 33/915 (2006.01)
CPC (source: EP US)
H01H 33/903 (2013.01 - EP US)
Designated contracting state (EPC)
BE CH DE ES FR GB GR IT LI LU NL
DOCDB simple family (publication)
EP 0239068 A1 19870930; EP 0239068 B1 19920520; BR 8701375 A 19871222; CN 1005877 B 19891122; CN 87102963 A 19871007; DE 3779159 D1 19920625; DK 147987 A 19870927; DK 147987 D0 19870323; DK 169157 B1 19940829; ES 2031463 T3 19921216; FR 2596575 A1 19871002; FR 2596575 B1 19880520; IE 59598 B1 19940309; IE 870775 L 19870926; JP 2571779 B2 19970116; JP S62234825 A 19871015; PT 84574 A 19870401; PT 84574 B 19891130; US 4774388 A 19880927
DOCDB simple family (application)
EP 87104299 A 19870324; BR 8701375 A 19870326; CN 87102963 A 19870324; DE 3779159 T 19870324; DK 147987 A 19870323; ES 87104299 T 19870324; FR 8604393 A 19860326; IE 77587 A 19870325; JP 7131687 A 19870325; PT 8457487 A 19870326; US 3030487 A 19870326