JPH02116702U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の要部を説明するためのグラ
フ、第２図は電気力線を示す要部の拡大断面図、
第３図は避雷素子の収容構造を示す中央部縦断面
図、第４図はこの考案を具体化した懸垂型避雷碍
子の避雷素子付近を示す中央部半縦断面図、第５
図は電気力線を示す要部の拡大断面図、第６図及
び第７図は比較例を示す断面図、第８図は従来例
を示す中央部縦断面図である。 １……避雷碍子、２……碍子本体、２ｄ……取
付筒部、６……避雷素子、８……導電部材として
の中間電極、９……外部封止電極、９ａ……外側
円筒部、９ｂ……先端縁、Ｓ……避雷素子と中間
電極との接触界面、Ｌ……避雷素子６の全長、Δ
ｌ……前記接触界面Ｓから外側円筒部９ａの先端
縁９ｂまでの距離、Ｅ……電気力線、ΔＥ……雷
サージ電流放電時の最大電位傾度。 Figure 1 is a graph for explaining the main parts of this invention, Figure 2 is an enlarged sectional view of the main parts showing lines of electric force,
Fig. 3 is a longitudinal sectional view of the central part showing the structure for accommodating the lightning arrester; Fig. 4 is a half longitudinal sectional view of the central part showing the vicinity of the lightning arrester of a suspended lightning arrester embodying this invention;
The figure is an enlarged sectional view of a main part showing lines of electric force, FIGS. 6 and 7 are sectional views showing a comparative example, and FIG. 8 is a longitudinal sectional view of a central part showing a conventional example. DESCRIPTION OF SYMBOLS 1... Lightning arrester, 2... Insulator main body, 2d... Mounting tube part, 6... Lightning arrester, 8... Intermediate electrode as a conductive member, 9... External sealing electrode, 9a... Outer cylindrical part, 9b...Tip edge, S...Contact interface between lightning arrester element and intermediate electrode, L...Full length of lightning arrester element 6, Δ
l... Distance from the contact interface S to the tip edge 9b of the outer cylindrical portion 9a, E... Lines of electric force, ΔE... Maximum potential gradient during lightning surge current discharge.

Claims (1)

【実用新案登録請求の範囲】 磁器筒体２ｄの内部に電圧−電流特性が非直線
性の避雷素子６を収容するとともに、前記磁器筒
体の端部に外部封止電極９を嵌合して該封止電極
の外側筒部９ａを前記磁器筒体の外周面に形成し
た凹状溝２ｅにカシメ付け固定し、さらに、前記
避雷素子と外部封止電極との間に導電部材８を介
在した避雷器において、 前記避雷素子６の全長をＬとし、避雷素子と導
電部材８との界面Ｓの高さ位置から外部封止電極
９の外側筒部９ａの先端縁９ｂまでの距離をΔｌ
とすると、 ０≦Δｌ／Ｌ≦１０（％） となるように設定したことを特徴とする外部封
止電極の配置構造。[Claims for Utility Model Registration] A lightning arrester element 6 with non-linear voltage-current characteristics is housed inside the porcelain cylinder 2d, and an external sealing electrode 9 is fitted to the end of the porcelain cylinder. A lightning arrester in which an outer cylindrical portion 9a of the sealing electrode is caulked and fixed in a concave groove 2e formed on the outer peripheral surface of the porcelain cylinder, and a conductive member 8 is interposed between the lightning arrester element and the outer sealing electrode. In, the total length of the lightning arrester element 6 is L, and the distance from the height position of the interface S between the lightning arrester element and the conductive member 8 to the tip edge 9b of the outer cylinder part 9a of the external sealing electrode 9 is Δl.
Then, an arrangement structure of external sealing electrodes is set such that 0≦Δl/L≦10(%).