Switching apparatus filled with electrically insulating gas

摘要

A switching apparatus comprises a gas-tight sealed envelope which encloses an enclosed type switch such as a vacuum circuit breaker 24 connected to an electrical load and a pair of open type load-break switches 34 and which is filled with electrically insulating gas. A gas-flow guide 122, 123 includes a designated flow of arc gases produced when one of the load-break switches 34 is opened so as to prevent undesirable arc gas flow toward the vacuum circuit breaker 24 and towards the other load-break switch 34. The envelope comprises a pair of U-shaped members welded to each other in a gas-tight fashion to provide a hexahedral tank, the U-shaped section of one member being perpendicular to the U-shaped section of the other.