High-voltage switches with arc preventing or extinguishing devices inventions 11/07

20070272658 - Puffer circuit breaker with an overpressure valve: A circuit breaker comprises a puffer volume (9) and at least one overpressure valve (16) for dis-charging gas from the puffer volume (9), if the pressure therein exceeds a given threshold. The overpressure valve (16) is formed by a piston (17) and a spring (19) as well as by a... Agent: Buchanan, Ingersoll & Rooney PC

20070272659 - Switching chamber for a gas-insulated high-voltage circuit breaker: The switching chamber is intended for a gas-insulated high-voltage circuit breaker. It contains an axially symmetrical housing and a contact arrangement held in the housing with two switching pieces, of which at least one is arranged such that it can move along the housing axis. The switching chamber housing has... Agent: Buchanan, Ingersoll & Rooney PC

20070267388 - Electrical switching system: An electrical switching system, preferably a medium-voltage switching system, has a power switch or load switch, a disconnecting switch, and a grounding switch configured as a vacuum switching chamber. Low separation distance lengths and a more compact construction of a switching system is achieved by means of a housing in... Agent: William Collard Collard & Roe, P.C.

20070262053 - Puffer-type gas blast circuit breaker: A puffer-type gas blast circuit breaker is capable of restraining reduction in creepage insulation resistance of an insulating support and an insulating rod due to insulating gas of high temperature. An electrode section is mounted on a stationary member supported on an insulating support, and a stationary side arc contact... Agent: Buchanan, Ingersoll & Rooney PC

20070262054 - Switchgear: A switchgear having interrupters wherein at least two moving contacts are capable of being open and close with respect to respective fixed contacts. The switchgear comprises a non-earthed metal vacuum chamber enclosing the interrupters therein, a connection conductor for connecting the moving contacts, an operating rod connected to the connecting... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20070262055 - Alternator disconnector circuit-breaker actuated by a servomotor: A first switch (10) has a first pair of contacts (12, 14) that are mounted to move relative to each other in translation. A circuit-breaker second switch (20) has a second pair of contacts (21, 24) that are mounted to move relative to each other in translation, the second switch... Agent: Thelen Reid Brown Raysman & Steiner LLP