Bushing and a method for producing the same

Details Bushing and a method for producing the same Bushing and a method for producing the same

2009-06-18

2010-10-12

Estrada, Angel R (Department: 2831)

Electricity: conductors and insulators

Feedthrough or bushing

Collar with engagement member

C174S650000, C174S1520GM, C174S13700R, C016S002100, C016S002200

Reexamination Certificate

active

07812266

ABSTRACT:
A bushing is disclosed with a duct for accommodating a conductor which is surrounded by an electrical field grading insulation. The bushing includes a core with a shell encapsulating the grading insulation and a flange surrounding the shell and carrying through holes distributed over its circumference for allowing the bushing to be attached to a wall. The shell and the flange can be in one piece and include an insulating matrix material. The through holes can be surrounded by metal inserts each forming an annular surface flush with a surface of the flange. A test tap can include a contact pin which is electrically conductively connected to an outermost layer of the grading insulation and surrounded by a contact ring connected to every second metal insert by connection wires for grounding the contact pin via the contact ring when the test tap is not in use and covered. The core can be produced by filling a mold with the liquid matrix material after components of the grading insulation and other parts have been fixed in the liquid matrix material.

REFERENCES:
patent: 3861777 (1975-01-01), Clark
patent: 4965407 (1990-10-01), Hamm
patent: 6610933 (2003-08-01), Baker et al.
patent: 2002/0104679 (2002-08-01), Krol et al.
patent: 0 075 471 (1983-03-01), None
patent: 620822 (1949-03-01), None
International Search Report (PCT/ISA/210) dated Aug. 10, 2007.
Written Opinion of the International Searching Authority (PCT/ISA/237) dated Aug. 10, 2007.

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