Electrical insulating bushing assembly, kit for providing same, and method of installing same

A method of installing an electrical insulating bushing in an electrical device having at least one outer metallic wall defining a bushing-receiving aperture, comprising the steps of:

• providing a bushing having opposed ends and terminals at each end;
• providing external threads on at least a portion of said bushing outer surface intermediate the ends of the bushing;
• providing an external flange of electrical insulating material, outwardly extending from said bushing and located intermediate the ends thereof;
• providing a metallic interface collar with a mating face opposite said bushing flange and an internal wall, and forming threads on said internal wall for engaging the threaded portion of the bushing;
• welding said interface collar to said device wall;
• providing an annular gasket;
• coating adhesive on at least one of said bushing and said interface collar;
• inserting said gasket between said bushing and said interface collar;
• inserting one end of said bushing through said interface collar;
• threadingly engaging said flange and said bushinq outer portion so as to compress said gasket therebetween to form a fluid-tight seal therebetween while joining said bushing and said interface collar together;
• and
• allowing said adhesive to cure so as to maintain the joinder and the fluid-tight seal between said bushing flange and said interface collar.

A housing assembly for an electrical component comprising:

• a closure for at least partly enclosing an electrical component immersed in a dielectric fluid and said closure having an external metallic wall defining an aperture through which an electrical insulating bushing can be inserted;
• an electrical-insulating bushing having a body with opposed ends, one of which is disposed within said closure and electrical terminals at each end;
• a metallic interface collar having an internal wall defining a central bushing-receiving passageway, a mating face and an opposed closure-engaging face, said collar welded to said closure metallic wall;
• a flange of insulating material outwardly extending from the bushing and pressed against said interface collar;
• a resilient gasket between said bushing flange and said interface collar;
• a first portion of said bushing extending through said interface collar and said metallic wall;
• and
• said bushing flange and said interface collar being adhesively joined together so as to maintain a compression of said gasket between said bushing flange and said interface collar mating face and so as to form a fluid-tight seal therebetween.

A housing assembly for an electrical component comprising:

• a closure for at least partly enclosing an electrical component and having an external metallic wall defining an aperture through which an electrically-insulating bushing can be inserted;
• an electrical-insulating bushing having opposed ends and terminals at each end ;
• a metallic interface collar welded to said closure metallic wall and defining a threaded bushing-receiving aperture;
• one end of said bushing disposed within said closure and extending through said interface collar aperture;
• a flange of insulating material outwardly extending from the bushing;
• a resilient gasket between said bushing flange and said interface collar;
• external threads on a first portion of said bushing adjacent said flange matingly engaged with the threads of said interface collar so as to press said bushing flange and said interface collar together;
• said bushing extending through said interface collar and said metallic wall;
• and
• said bushing flange and said interface collar being adhesively joined together so as to maintain a compression of said gasket between said bushing flange and said interface collar and so as to form a fluid-tight seal therebetween.

A housing assembly for an electrical component comprising:

• a closure for at least partly enclosing an electrical component and having an external metallic wall defining an aperture through which an electrically-insulating bushing can be inserted;
• an electrical-insulating bushing having opposed ends and terminals at each end;
• a metallic mounting disk welded to said closure metallic wall and defining a bushing-receiving aperture;
• one end of said bushing disposed within said closure and extending through said mounting disk aperture;
• a flange of insulating material outwardly extending from the bushing;
• a resilient gasket between said bushing flange and said mounting disk;
• said bushing extending through said mounting disk and said metallic wall;
• a mounting ring defining a bushing receiving aperture with internal threads for mating with threads on said bushing, and having a face for engaging said mounting disk when mounted to said bushing;
• external threads on a first portion of said bushing adjacent said flange matingly engaged with the threads of said mounting ring so as to press said bushing flange and said mounting disk together;
• and
• said bushing flange and said mounting disk being adhesively joined together so as to maintain a compression of said gasket between said bushing flange and said mounting disk and so as to form a fluid-tight seal therebetween.

A kit for providing an electrical-insulating bushing in an aperture of an external metallic wall of a fluid-containing enclosure of an electrical component immersed in a dielectric fluid, comprising;

• a metallic interface collar for welding to portions of the outer metallic wall of the enclosure surrounding said aperture and having an internal bushing-receiving passageway with internal threads;
• a bushing having an insulating body with opposed ends, electrically-conducting terminals at each end, an outwardly extending flange with a mating face intermediate the ends, a gasket-receiving recess in said flange extending from the mating face thereof, and external threads formed on an outside surface of said bushing intermediate the ends thereof and adjacent the flange thereof;
• a resilient gasket dimensioned to be at least partially received in said flange recess;
• and
• an adhesive for joining the bushing flange and the interface collar together after welding of said collar to the enclosure wall, so as to form a fluid-tight seal therebetween.

A kit for providing an electrical-insulating bushing in an aperture of an external metallic wall of a fluid-containing enclosure of an electrical component immersed in a dielectric fluid, comprising;

• a bushing having an insulating body with opposed ends, electrically-conducting terminals at each end, an outwardly extending flange with a mating face intermediate the ends, a gasket-receiving recess in said flange extending from the mating face thereof, and external threads formed on an outside surface of said bushing intermediate the ends thereof and adjacent the flange thereof;
• a resilient gasket dimensioned to be at least partially received in said flange recess;
• and
• a metallic mounting disk for welding to portions of the outer metallic wall of the enclosure surrounding said aperture;
• a mounting ring defining a bushing receiving aperture with internal threads for mating with the threads on said bushing so as to compress said resilient gasket, and said mounting ring having a mating face for engaging said mounting disk when said mounting ring is threadingly mated with said bushing;
• and
• an adhesive for joining the bushing flange and the mounting disk together after welding of said mounting disk to the enclosure wall, so as to form a fluid-tight seal therebetween.