EP 0126929 B2 19930623 - PRESSURISED-GAS SWITCH
Title (en)
PRESSURISED-GAS SWITCH
Publication
Application
Priority
CH 296883 A 19830531
Abstract (en)
[origin: US4556767A] A gas-blast breaker with two contact members which are movable relative to one another. Each contact member is provided with a respective sparking contact. The contacts communicate with a cylindrical compression chamber whose volume varies as a function of the movement of the contact members and which is filled pressurized gas. A channel leading into a quenching zone between the sparking contacts extends into a first one of the two end faces of the compression chamber. A second one of the two end faces is bounded by a piston which is displaceable along the cylinder axis of the compression chamber and which is subjected to the action of a tensioned spring. The circuit breaker is suited for reliably interrupting both small and large currents, with a comparatively weak and simple drive mechanism for the movable contact member. The piston interacts with a fixed stop which is arranged such that the movement of the piston which is subjected to the action of the tensioned spring is blocked, below a predetermined first gas pressure in the compression chamber, against the movement of one of the contact members which is moved upon the occurrence of a breaking operation in the circuit breaker.
IPC 1-7
IPC 8 full level
H01H 33/91 (2006.01); H01H 33/90 (2006.01); H01H 33/915 (2006.01)
CPC (source: EP US)
H01H 33/901 (2013.01 - EP US); H01H 33/905 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR LI SE
DOCDB simple family (publication)
EP 0126929 A2 19841205; EP 0126929 A3 19860709; EP 0126929 B1 19890802; EP 0126929 B2 19930623; DE 3322597 A1 19841206; DE 3479265 D1 19890907; JP H0664975 B2 19940822; JP S59228328 A 19841221; US 4556767 A 19851203
DOCDB simple family (application)
EP 84104058 A 19840411; DE 3322597 A 19830623; DE 3479265 T 19840411; JP 10766484 A 19840529; US 61486684 A 19840529