EP 0515267 A1 19921125 - Gas-blast load-break middle and high voltage switch.
Title (en)
Gas-blast load-break middle and high voltage switch.
Title (de)
Druckgaslastschalter für Mittel- und Hochspannung.
Title (fr)
Disjoncteur à gaz de soufflage pour haute et moyenne tension.
Publication
Application
Priority
FR 9106214 A 19910523
Abstract (en)
The invention relates to a gas-blast circuit breaker comprising a cylindrical metallic or insulating envelope (1) filled with pressurised dielectric gas, a fixed arc contact (3) and a movable rig connected to an operating member comprising a blast cylinder (4) associated with a blast nozzle (6) and cooperating with at least one piston (7), and a moving arc contact (9) carried by a tubular part (8) inside the blast cylinder (4). <??>According to the invention, the internal wall of the said tubular part (8) includes a neck restriction of smaller cross-section than the inner cross-section of the tubular part (8) and coaxial with the latter. <??>Thus cutoff is improved by increasing the gas pressure in proximity to the moving arc contact through a particularly simple and inexpensive arrangement. <IMAGE>
IPC 1-7
IPC 8 full level
H01H 33/70 (2006.01); H01H 33/91 (2006.01); H01H 33/915 (2006.01)
CPC (source: EP US)
H01H 33/7015 (2013.01 - EP US); H01H 33/91 (2013.01 - EP US)
Citation (search report)
- [X] US 3858015 A 19741231 - DENO D
- [A] FR 2377695 A1 19780811 - MERLIN GERIN [FR]
- [A] US 4939322 A 19900703 - KASHIMURA KATSUICHI [JP], et al
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0515267 A1 19921125; EP 0515267 B1 19961113; AT E145300 T1 19961115; DE 69215140 D1 19961219; DE 69215140 T2 19970306; DK 0515267 T3 19970217; ES 2093800 T3 19970101; FR 2676858 A1 19921127; FR 2676858 B1 19940610; JP H05166443 A 19930702; US 5216214 A 19930601
DOCDB simple family (application)
EP 92401368 A 19920520; AT 92401368 T 19920520; DE 69215140 T 19920520; DK 92401368 T 19920520; ES 92401368 T 19920520; FR 9106214 A 19910523; JP 13104392 A 19920522; US 88614692 A 19920521