Corona control ring having elongated water discharge holes
AssigneeNGK Insulators, Ltd.
InventorsMasamichi Ishihara, Toshiyuki Nakachi, Shuji Fujii
Life of this patent
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Abstract
A corona control ring has a corona control ring main body and a water discharge hole having an elongated shape like a racetrack. The corona control ring main body includes a bottom portion and an inner wall portion and an outer wall portion respectively arranged at an inner edge portion and an outer edge portion of the bottom portion. The water discharge hole is arranged in the bottom portion. A depression portion is formed in the corona control ring main body by the inner wall portion, the outer wall portion and the bottom portion. Accordingly, the present invention provides a corona control ring which can suppress a corona discharge even during rain fall.
Claims9
A corona control ring, comprising:
- a corona control ring main body having a bottom portion, an inner wall portion and an outer wall portion, said inner and outer wall portions respectively arranged at an inner edge portion and an outer edge portion of said bottom portion;
- and
- at least one elongated water discharge hole arranged in said bottom portion along an extended circumferential direction of said corona control ring main body.
A corona control ring, comprising;
- a corona control ring main body having an outer bottom portion, an outer wall portion arranged at an outer edge portion of said outer bottom portion and an inner edge portion of said outer bottom portion being free from an inner wall portion, wherein a cross section of said outer wall portion of said corona control ring main body is substantially a quarter circle.
Dependencies are inferred from the claim text.