Title:
COMPOSITE INSULATOR
Document Type and Number:
Japanese Patent JP3445454
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide the most excellent dirt withstand voltage characteristic by providing a covering having such a shape as large diameter shed portions and small diameter shed portions are alternatively arranged, and setting the ratio of a surface leak distance to the axis direction unit length of the covering axis so as to stay in a range of specific values.
SOLUTION: A composite insulator with double-size shed portions is composed of a core member and a covering which is provided on the outer peripheral face of the core member and is made of insulation high molecular material. The covering has such a shape as large diameter shed portions and small diameter shed portions are alternatively arranged via sheaths, and the ratio 1/p of a surface leak distance (l) to the axis direction unit length (p) of the covering is in a range of 4.3 to 5.0. In a composite insulator with double-size shed portions, a straight line distance combining the radial direction outside tip of a large diameter shed portion and the radial direction outside tip of a small diameter shed portion (distance between shed tips (c)) is 32 to 40mm. Since a l/p value can be set in a proper range, the use amount of covering rubber for obtaining the maximum dirt withstand voltage becomes proper.
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Inventors:
Tsutomu Moriya
Yukiteru Fukami
Kuniaki Kondo
Yukiteru Fukami
Kuniaki Kondo
Application Number:
JP30261196A
Publication Date:
September 08, 2003
Filing Date:
November 14, 1996
Export Citation:
Assignee:
Nippon Insulator Co., Ltd.
International Classes:
H01B17/00; H01B17/32; (IPC1-7): H01B17/00
Domestic Patent References:
| JP53135493A | ||||
| JP63193413A | ||||
| JP4011536B1 |
Attorney, Agent or Firm:
Sugimura Kosaku (8 people outside)