EP 0944914 B1 20031015 - LOW PRESSURE GAS DISCHARGE SWITCH
Title (en)
LOW PRESSURE GAS DISCHARGE SWITCH
Title (de)
NIEDERDRUCK-GASENTLADUNGSSCHALTER
Title (fr)
COMMUTATEUR A DECHARGE GAZEUSE BASSE PRESSION
Publication
Application
Priority
- DE 9702864 W 19971209
- DE 19651744 A 19961212
Abstract (en)
[origin: WO9826442A1] To enable gas discharge at a low pressure, at least two main electrodes separated by a distance d are provided, defining in a circuit-breaking case the cathode and the anode with the spacing required for said gas discharge at a low pressure. The gas discharge is triggered by increasing the electron density in the hollow cathode space. It is also necessary for the cathode to have at least one opening and preferably that both the cathode and the anode have aligned openings facing each other. According to the invention, elements are mounted on the main electrodes to create a magnetic field above the discharge between said main electrodes (1, 1a, 2, 2a). These elements are used to generate a magnetic field oriented either substantially parallel to the current flow during the discharge or transversal to the latter. Said elements are advantageously realized in the form of stretch punctures (11, 11', 21, 21') either in hollow cylinders forming part of the anode (1) and the cathode (2) designed as hollow electrodes or in the supply conductors associated therewith.
IPC 1-7
IPC 8 full level
H01J 17/04 (2012.01); H01J 17/14 (2006.01); H01J 17/44 (2006.01); H01H 33/66 (2006.01)
CPC (source: EP US)
H01J 17/04 (2013.01 - EP US); H01J 17/14 (2013.01 - EP US); H01J 17/44 (2013.01 - EP US); H01H 33/6642 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9826442 A1 19980618; DE 59710868 D1 20031120; EP 0944914 A1 19990929; EP 0944914 B1 20031015; US 6417604 B1 20020709
DOCDB simple family (application)
DE 9702864 W 19971209; DE 59710868 T 19971209; EP 97951838 A 19971209; US 31965599 A 19990910