EP 0530544 B1 19970507 - Fluid pressure operating means, for opening and closing the contacts of a circuit breaker
Title (en)
Fluid pressure operating means, for opening and closing the contacts of a circuit breaker
Title (de)
Druckmittelantrieb zum Schliessen und Oeffnen der Kontakte eines Schalters
Title (fr)
Système de commande actionné par un fluide sous pression, pour la fermeture et l'ouverture des contacts d'un interrupteur
Publication
Application
Priority
CH 263291 A 19910906
Abstract (en)
[origin: US5298702A] The pressure medium drive is provided for opening and closing the contacts (e1, e2) of an electric circuit-breaker. It contains a pressure medium reservoir (r), a drive piston (t) which slides in a drive cylinder (c) and acts on a mechanism (j) for displacing a movable contact (e1) of the circuit-breaker, and a reversing valve (s) for the selective connection of the pressure medium reservoir (r) to the drive cylinder (c) or of the drive cylinder (c) to an outlet volume for the pressure medium. This pressure medium drive is of simple, inexpensive construction and can open the contacts of the circuit-breaker considerably faster than it can close them. This is due to an interposed valve (v) which is disposed between the pressure medium reservoir (r) and the reversing valve (s) and has a flow cross section determined by the closing time of the contacts (e1, e2), and to the much larger flow cross section of the reversing valve (s). This interposed valve (v) is open when closing the contacts (e1, e2) and passes pressure medium from the pressure medium reservoir (r) via the reversing valve (s) into the drive cylinder (c). After closing of the contacts (e1, e2), it is closed and then establishes the connection between the drive cylinder (c) and the outlet volume by reversing the reversing valve (s).
IPC 1-7
IPC 8 full level
H01H 3/24 (2006.01); H01H 33/30 (2006.01); H01H 33/32 (2006.01); H01H 33/34 (2006.01)
CPC (source: EP KR US)
H01H 33/00 (2013.01 - KR); H01H 33/30 (2013.01 - EP US); Y10T 137/8326 (2015.04 - EP US); Y10T 137/8663 (2015.04 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0530544 A1 19930310; EP 0530544 B1 19970507; AT E152856 T1 19970515; CH 684969 A5 19950215; CN 1029358 C 19950719; CN 1070284 A 19930324; CZ 271792 A3 19930317; CZ 281378 B6 19960911; DE 59208449 D1 19970612; DK 0530544 T3 19971103; ES 2106110 T3 19971101; HU 216206 B 19990528; HU 9202854 D0 19921228; HU T69200 A 19950828; JP H05211017 A 19930820; KR 100262990 B1 20000801; KR 930006770 A 19930421; PL 170397 B1 19961231; PL 295803 A1 19930419; RU 2039388 C1 19950709; US 5298702 A 19940329
DOCDB simple family (application)
EP 92113595 A 19920810; AT 92113595 T 19920810; CH 263291 A 19910906; CN 92110284 A 19920905; CS 271792 A 19920831; DE 59208449 T 19920810; DK 92113595 T 19920810; ES 92113595 T 19920810; HU 9202854 A 19920904; JP 22898592 A 19920827; KR 920016156 A 19920904; PL 29580392 A 19920901; SU 5052619 A 19920904; US 94130692 A 19920904