Circuit breaker connection to gas insulated bus

Claim 1

In a gas insulated electrical substation, a transition connection between a gas-filled circuit breaker and a gas-filled disconnect switch; said gas-filled circuit breaker comprising a metallic tank filled with a dielectric gas under positive pressure and having a hollow cylindrical member extending therethrough and a terminal conductor extending through and insulated from said cylindrical member, and a current transformer encircling said terminal conductor; said gas-filled disconnect switch including a cylindrical switch housing, a switch contact member and a conductive tube member connected to said switch contact member, and insulator disk suppport means supporting said conductive tube member relative to said cylindrical switch housing; said terminal conductor having an end which is spaced from an end of said conductive tube member, which spacing would normally disconnect said circuit breaker from said disconnect switch; said transition connection including a central removable conductor connectible between said end of said terminal conductor and said end of said conductive tube member, and an outer enclosure generally surrounding said central removable conductor and having first and second ends; said first and second ends of said outer enclosure being respectively removably connected to respective opposing and spaced ends of said hollow cylindrical member which extends through said circuit breaker tank, and said cylindrical switch housing of said gas-filled disconnect switch; and removable section means in said outer enclosure to afford access to said central removable conductor to enable connection and disconnection of said central removable conductor, whereby movement of said removable conductor to a removed position and removal of said outer enclosure enables removal of said current transformer.