JPS623669A - Leak current measuring pilot insulator - Google Patents

Leak current measuring pilot insulator

Info

Publication number
JPS623669A
JPS623669A JP14368185A JP14368185A JPS623669A JP S623669 A JPS623669 A JP S623669A JP 14368185 A JP14368185 A JP 14368185A JP 14368185 A JP14368185 A JP 14368185A JP S623669 A JPS623669 A JP S623669A
Authority
JP
Japan
Prior art keywords
electrodes
comb
electrode
insulator
outside
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14368185A
Other languages
Japanese (ja)
Other versions
JPH0521430B2 (en
Inventor
Toshiyuki Kawaguchi
川口 敏幸
Genzo Kimura
木村 元三
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGK Insulators Ltd
Original Assignee
NGK Insulators Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd
Priority to JP14368185A priority Critical patent/JPS623669A/en
Publication of JPS623669A publication Critical patent/JPS623669A/en
Publication of JPH0521430B2 publication Critical patent/JPH0521430B2/ja
Granted legal-status Critical Current

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  • Testing Relating To Insulation (AREA)
  • Insulators (AREA)

Abstract

PURPOSE:To minimize the measurement error based on the ununiformity of humidity by arranging comb-line electrodes, whose basic electrodes are directed radially, on the inside part where a dry belt is formed easily in a high humidity. CONSTITUTION:Comb-line electrodes 2 and 3 are arranged approximately homogeneously on the whole surface of a shed part of an insulator body 1. Electrodes 2 are arranged double on the inside part of the shed part. Basic electrodes 4 are directed radially, and branch electrodes branched from electrodes 4 are directed in the peripheral direction. Electrodes 3 are arranged double on the outside part of the shed part, and their basic electrodes 7 are detected in the circumferential direction, and branch electrodes 8 branched from electrodes 7 are directed radially. The electrodes 3 form approximately parallel small gaps between inside electrodes 8 and outside electrodes 8, and the inside electrodes 3 are connected to the outside electrodes 2. The error in the electrodes 2 is hardly generated because of the dry belt.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は実碍子と同一の環境下に置かれ、実碍子と同等
の汚損物を付着させたうえでその漏れ電流を測定して実
碍子の絶縁強度の低下を推定するための漏れ電流測定用
パイロット碍子に関するものである。
Detailed Description of the Invention (Industrial Field of Application) The present invention is an insulator that is placed under the same environment as a real insulator, contaminated with the same amount as a real insulator, and then measured for leakage current. This invention relates to a pilot insulator for measuring leakage current for estimating a decrease in insulation strength.

(従来の技術) 漏れ電流測定用バイロフト碍子は、その表面に多数の電
極を配置して汚損度に応して変化する漏れ電流の測定を
行うものであるが、従来の漏れ電流測定用バイロフト碍
子においては例えば特開昭57−98872号に示され
るように平行な電極が局部的に配列されたものが多かっ
た。このためパイロット碍子の全面が均質に汚損された
場合には正確な漏れ電流の測定が行えるが、不平等汚損
の場合には汚損部位が電極上にあるときには大きい漏れ
電流が検出され、汚損部位が電極のないところに位置す
るときには漏れ電流が検出されないこととなり、碍子全
面の汚損量に対応した正確な測定が行えない欠点があっ
た。更にまた、従来の漏れ電流測定用パイロット碍子に
おいては笠の内側部分にも外側部分にも同一形状の電極
が配置されているが、漏れ電流の測定に先立って行われ
る蒸気による加湿の際に笠の外側部分には水腹が発生し
易く、笠の内側部分には乾燥したドライベルトを形成し
易いという湿潤の不均一性が不可避的に生ずるので、こ
れにより漏れ電流が大幅に変動して正確な測定が行えな
い欠点もあった。
(Prior art) A virofut insulator for leakage current measurement measures a leakage current that changes depending on the degree of contamination by arranging a large number of electrodes on its surface. In many cases, parallel electrodes were locally arranged, as shown in, for example, Japanese Patent Laid-Open No. 57-98872. For this reason, if the entire surface of the pilot insulator is homogeneously contaminated, accurate leakage current measurements can be made, but in the case of uneven contamination, a large leakage current will be detected when the contaminated area is on the electrode, and the contaminated area will be When located in a place where there are no electrodes, no leakage current is detected, which has the disadvantage that accurate measurements corresponding to the amount of contamination on the entire surface of the insulator cannot be performed. Furthermore, in conventional pilot insulators for measuring leakage current, electrodes of the same shape are arranged on the inside and outside of the shade, but when humidifying the shade with steam prior to measuring leakage current, This inevitably results in non-uniformity in moisture, with the outside part of the shade easily forming a water belly and the inside part of the shade easily forming a dry belt. There was also the drawback that accurate measurements could not be made.

(発明が解決しまうとする問題点) 本発明はこのような従来の問題点を解決して、不平等汚
…や湿潤の不均一性が生じた場合にも碍子の全面の汚損
量に対応した漏れ電流の測定を正確に行うことができる
漏れ電流測定用パイロット碍子を目的として完成された
ものである。
(Problems to be solved by the invention) The present invention solves these conventional problems and can cope with the amount of contamination on the entire surface of the insulator even when uneven contamination or non-uniformity of moisture occurs. It was completed for the purpose of being a pilot insulator for leakage current measurement that can accurately measure leakage current.

(問題点を解決するための手段) 本発明は碍子本体の笠部の全表面に、互いに平行に組合
わされた複数のくし形電極を、笠部の内側部分ではくし
形電極の基幹電極を放射線方向に向けまた笠部の外側部
分ではくし形電極の基幹電極を円周方向に向けて配ごし
たことを特徴とするものである。
(Means for Solving the Problems) The present invention has a plurality of comb-shaped electrodes combined in parallel to each other on the entire surface of the shade of an insulator body, and a basic electrode of the comb-shaped electrodes in the inner part of the shade. The main electrode of the comb-shaped electrode is arranged in the circumferential direction in the outer part of the cap.

(実施例) 次に本発明を図示の実施例について更に詳細に説明する
と、第1図及び第2図において(1)はバイロフト碍子
の碍子本体、(2)、(3)は碍子本体(])の笠部の
全表面にわたりほぼ均質に配置された多数のくし形電極
である。くし形電極(2)は笠部の内側部に少くとも内
外2重に配置されるもので、その基幹電極(4)は放射
線方向に向けられており、基幹電極(4)から分枝され
た枝電極(5)を円周方向に向けたものである。第2図
に示されるように、くし形電極(2)は中心部の環状電
極(6)の周囲の例えば8箇所に均等に配置されたもの
で、くし形電極(2)のうち中心側のものはその基V?
電極(4)を環状電極(6)に結合させである。内外の
(し形電極(2)はその枝電極(5)、(5)間に略平
行な小間隔を形成させて配置されたもので、大気中に存
在する海塩核の大きさが0゜03〜0.6 μmであり
、薄気加湿による付着水滴の大きさが最大数Imである
こと、及び漏れ電流の測定には電極間が海塩核を含む水
滴により連結された状態となるのが好ましいことから、
枝電極(5)、(5)間の間隔は0.1〜5N程度とす
ることが好ましい。
(Embodiment) Next, the present invention will be explained in more detail with reference to the illustrated embodiment. In FIGS. 1 and 2, (1) is the insulator body of the virofut insulator, (2) and (3) are the insulator bodies () ) A large number of comb-shaped electrodes are arranged almost uniformly over the entire surface of the cap. The comb-shaped electrodes (2) are arranged at least twice inside and outside the cap, and the main electrode (4) is oriented in the radial direction, and is branched from the main electrode (4). The branch electrodes (5) are oriented in the circumferential direction. As shown in Fig. 2, the comb-shaped electrodes (2) are arranged evenly at, for example, eight locations around the annular electrode (6) at the center. Is the thing its base V?
The electrode (4) is coupled to the annular electrode (6). The inner and outer (riboid-shaped electrodes (2) are arranged with a small space approximately parallel between the branch electrodes (5), (5), and the size of the sea salt nuclei present in the atmosphere is 0. 03 to 0.6 μm, and the maximum size of water droplets due to thin air humidification is several Im, and in order to measure leakage current, the electrodes are connected by water droplets containing sea salt nuclei. Since it is preferable to
The spacing between the branch electrodes (5), (5) is preferably about 0.1 to 5N.

くし形電極(3)は笠部の外側部分に少くとも内外2重
に配置されるもので、その基幹電極(7)を円周方向に
向け、基幹電極(7)から分枝する枝電極(8)を放射
線方向に向けている。第2図に示されるように、くし形
電極(3)も内側の枝電極(8)と外側の枝電極(8)
との間に略平行な小間隔を形成するように配置されたも
ので、内側のくし形電極(3)は外側のくし形電極(2
)と接続されている。なお、第2図は碍子本体(1)の
上面のみを図示したものであるが、下面にもこれと同様
のくし形電極(2)、(3)が配置されており、上面中
央の環状電極(6)と図示されない下面中央の環状電極
間で漏れ電流の測定を行うものである。また、第3図に
示すように、碍子本体(1)の笠部の表面にほぼ一定の
間隔でくし形電極(2)、(3)を配置してもよい。
The comb-shaped electrodes (3) are arranged at least twice, inside and outside, on the outside of the cap, with the main electrode (7) facing in the circumferential direction, and the branch electrodes (7) branching from the main electrode (7). 8) is directed in the radial direction. As shown in Figure 2, the comb-shaped electrode (3) also has an inner branch electrode (8) and an outer branch electrode (8).
The inner comb-shaped electrode (3) is arranged so as to form a small, almost parallel interval between the outer comb-shaped electrode (2).
) is connected. Although Figure 2 shows only the top surface of the insulator body (1), similar comb-shaped electrodes (2) and (3) are arranged on the bottom surface, and the annular electrode in the center of the top surface The leakage current is measured between (6) and an annular electrode at the center of the lower surface (not shown). Furthermore, as shown in FIG. 3, comb-shaped electrodes (2) and (3) may be arranged at approximately constant intervals on the surface of the cap of the insulator body (1).

(作用) このように構成されたものは、実碍子と同一の自然環境
下に置かれて実碍子と同等の汚損物を付着させ、測定時
にはその表面を蒸気により湿潤させて海塩核等に起因す
る漏れ電流を測定することは従来と同様であるが、以下
に記するとおり不平等汚損や湿潤の不均一性による測定
誤差を極めて小さくすることができるものである。
(Function) The product constructed in this way is placed in the same natural environment as a real insulator, and has the same contaminants as a real insulator attached to it, and during measurement, its surface is moistened with steam to absorb sea salt cores, etc. Measuring the resulting leakage current is the same as in the conventional method, but as described below, measurement errors due to uneven contamination or non-uniformity of wetting can be extremely minimized.

先ず内側部分のくし形電極(2)の単体を示すと第4図
のとおりであり、第5図に示すとおりその各枝電極(5
)、(5)間の抵抗をrとし、この抵抗が放射線方向に
m列存在するとしたときその等価回路は第6図に示すと
おりとなって合成抵抗はr / mとなる。実際にはこ
のような単体が円周方向にn個並列に設けられているか
ら、全抵抗R1=r/mnとなる。同様に外側部分のく
し形電極(3)の単体は第7図のとおりであり、各枝電
極(8)、(8)間の抵抗を第8図のようにrとしたと
きその等価回路は第9図のようにその全抵抗R3=mr
/nとなる。次に第10図に示すようにくし彫型1i1
i +2+のm列中の2列にドライベルト又は水膜が発
生して2列の抵抗がrからkrに異常に変化したものと
する(ドライベルトの時はkは大きい値をとり、水膜の
時はkはOに近くなる)。このときの等価回路は第11
図のとおりであり、このときの全抵抗R2′はr/n(
m−+りとk r / n 1の合成抵抗として次式に
より算出される。
First, the single comb-shaped electrode (2) on the inner side is shown in Figure 4, and each branch electrode (5) is shown in Figure 5.
), (5) is r, and if m columns of these resistors exist in the radial direction, the equivalent circuit is as shown in FIG. 6, and the combined resistance is r/m. Actually, since n such units are provided in parallel in the circumferential direction, the total resistance R1=r/mn. Similarly, the single comb-shaped electrode (3) on the outside is as shown in Figure 7, and when the resistance between each branch electrode (8) is r as shown in Figure 8, the equivalent circuit is As shown in Figure 9, the total resistance R3=mr
/n. Next, as shown in Figure 10, the comb shape 1i1 is
Assume that a dry belt or a water film occurs in two of the m rows of i +2+, and the resistance of the second row abnormally changes from r to kr (when a dry belt is used, k takes a large value, and a water film , k becomes close to O). The equivalent circuit at this time is the 11th
As shown in the figure, the total resistance R2' at this time is r/n(
It is calculated by the following formula as a combined resistance of m-+rithm and kr/n1.

同様にくし形電極(3)のm列中のp列に第12図のよ
うにドライベルト又は水腹が発生したときの等価回路は
第13図のとおりであり、このときの全抵抗Ry ’は
次式により算出される。
Similarly, when a dry belt or a water belly occurs in the p row of the m rows of comb-shaped electrodes (3) as shown in FIG. 12, the equivalent circuit is as shown in FIG. 13, and the total resistance Ry' is calculated by the following formula.

n          n             
            n従ってくし形電極(2)の
β列の抵抗がrからkrへ異常変化したことによる全抵
抗R2の誤差ε2は次式のとおりとなり、 またくし形電極(3)の2列の抵抗がrからkrへ異常
変化したことによる全抵抗R1の誤差ε、は次式のとお
りとなる。
n n
n Therefore, the error ε2 in the total resistance R2 due to the abnormal change in the resistance of the β row of the comb electrode (2) from r to kr is as follows, and the resistance of the 2 rows of the comb electrode (3) is r The error ε in the total resistance R1 due to the abnormal change from kr to kr is given by the following equation.

ところが前述のとおり、笠部の内側部分ではドライベル
トが発生する可能性が高く、従ってkは非常に大きい値
となるので、この場合にくし形電極(2)に生ずる誤差
ε2は0式にに一■を代入してε z  1 となり、一般にlはmよりもかなり小さいのでεZ#O
となってドライベルトによりほとんど誤差が生じないこ
ととなる。また、笠部の外側部分では水膜が生じ易く、
k−0となるが、この場合にくし形電極(3)に生ずる
誤差ε、は■式にに=Qを代入してε。
However, as mentioned above, there is a high possibility that a dry belt will occur in the inner part of the shade, and therefore k will be a very large value. Substituting 1■ gives ε z 1, and since l is generally much smaller than m, εZ#O
Therefore, almost no error occurs due to the dry belt. In addition, a water film tends to form on the outer part of the cap,
In this case, the error ε occurring in the comb-shaped electrode (3) can be calculated as ε by substituting =Q into the equation.

= −It / mとなり、一般にlはmよりもかなり
小さいのでε、′40となって水膜によりほとんど誤差
を生じないこととなる。
= -It/m, and since l is generally much smaller than m, ε is 40, and almost no error occurs due to the water film.

(発明の効果) 本発明は以上の説明からも明らかなように、湿潤時にド
ライベルトを形成し易い内側部分には基幹電極を放射線
方向に向けたくし形電極を配置してドライヘルドによる
漏れ電流の測定誤差をわずかなものとし、また水膜を形
成し易い笠部の外側部分には基幹電極を円周方向に向け
たくし形電極を配置して水膜による漏れ電流の測定誤差
をわずかなものとしたので、湿潤の不均一性に基づく測
定誤差を最小限に抑えることができる。更に、本発明に
おいては複数のくし形電極を笠部の表面に分散配置した
ので、不平等汚損の場合にも全面の汚損量に対応した漏
れ電流の測定を正確に行うことが可能となる。このよう
に本発明は不平等汚損や湿潤の不均一性が生じた場合に
も正確に漏れ電流の測定ができるものであるから、従来
のこの種のパイロット碍子の問題点を一掃したものとし
て、業界に寄与するところは極めて大である。
(Effects of the Invention) As is clear from the above description, the present invention measures leakage current using a dry held by arranging comb-shaped electrodes with the basic electrodes facing the radiation direction in the inner part where a dry belt is likely to form when wet. In addition, interdigitated electrodes are placed with the main electrode facing in the circumferential direction on the outer part of the cap, where water films are likely to form, to minimize errors in measurement of leakage current due to water films. Therefore, measurement errors due to non-uniformity of wetting can be minimized. Further, in the present invention, since a plurality of comb-shaped electrodes are distributed and arranged on the surface of the cap, even in the case of uneven contamination, it is possible to accurately measure the leakage current corresponding to the amount of contamination on the entire surface. As described above, the present invention enables accurate measurement of leakage current even when uneven contamination or non-uniformity of moisture occurs, and thus eliminates the problems of conventional pilot insulators of this type. The contribution to the industry is extremely large.

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

第1図は本発明の実施例を示す正面図、第2図はその平
面図、第3図は他の実施例を示す平面図、第4図はくし
形電極(2)の単体を示す平面図、第5図はその抵抗回
路図、第6図はその等価回路図、第7図はくし形電極(
3)の単体を示す平面図、第8図はその抵抗回路図、第
9図はその等価回路図、第10図はくし形電極(2)に
ドライベルト等が発生した状態を示す平面図、第11図
はその等価回路図、第12図はくし形電極(3)に水膜
等が発生した状態を示す平面図、第13図はその等価回
路図である。 (1):碍子本体、(2)、(31: < L形電極、
(4)、(7):基幹電極。
Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a plan view showing another embodiment, and Fig. 4 is a plan view showing a single comb-shaped electrode (2). , Figure 5 is its resistance circuit diagram, Figure 6 is its equivalent circuit diagram, and Figure 7 is the comb-shaped electrode (
3) is a plan view showing a single unit, FIG. 8 is its resistance circuit diagram, FIG. 9 is its equivalent circuit diagram, FIG. FIG. 11 is an equivalent circuit diagram thereof, FIG. 12 is a plan view showing a state in which a water film or the like is generated on the comb-shaped electrode (3), and FIG. 13 is an equivalent circuit diagram thereof. (1): Insulator body, (2), (31: < L-shaped electrode,
(4), (7): Basic electrode.

Claims (1)

【特許請求の範囲】[Claims] 碍子本体(1)の笠部の全表面に、互いに平行に組合わ
された複数のくし形電極(2)、(3)を、笠部の内側
部分ではくし形電極(2)の基幹電極(4)を放射線方
向に向けまた笠部の外側部分ではくし形電極(3)の基
幹電極(7)を円周方向に向けて配置したことを特徴と
する漏れ電流測定用パイロット碍子。
A plurality of comb-shaped electrodes (2), (3) combined in parallel with each other are arranged on the entire surface of the cap of the insulator body (1), and the main electrode (4) of the comb-shaped electrode (2) is arranged in the inner part of the cap. ) is arranged in the radial direction, and the main electrode (7) of the comb-shaped electrode (3) is arranged in the outer part of the shade part in the circumferential direction.
JP14368185A 1985-06-28 1985-06-28 Leak current measuring pilot insulator Granted JPS623669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14368185A JPS623669A (en) 1985-06-28 1985-06-28 Leak current measuring pilot insulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14368185A JPS623669A (en) 1985-06-28 1985-06-28 Leak current measuring pilot insulator

Publications (2)

Publication Number Publication Date
JPS623669A true JPS623669A (en) 1987-01-09
JPH0521430B2 JPH0521430B2 (en) 1993-03-24

Family

ID=15344469

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14368185A Granted JPS623669A (en) 1985-06-28 1985-06-28 Leak current measuring pilot insulator

Country Status (1)

Country Link
JP (1) JPS623669A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104316753A (en) * 2014-11-08 2015-01-28 韩少卿 High-voltage transmission line insulator leakage current indicator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6449024B1 (en) 1996-01-26 2002-09-10 Semiconductor Energy Laboratory Co., Inc. Liquid crystal electro-optical device utilizing a polymer with an anisotropic refractive index

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104316753A (en) * 2014-11-08 2015-01-28 韩少卿 High-voltage transmission line insulator leakage current indicator

Also Published As

Publication number Publication date
JPH0521430B2 (en) 1993-03-24

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