JP2514075Y2 - High voltage split current transformer - Google Patents
High voltage split current transformerInfo
- Publication number
- JP2514075Y2 JP2514075Y2 JP1989111128U JP11112889U JP2514075Y2 JP 2514075 Y2 JP2514075 Y2 JP 2514075Y2 JP 1989111128 U JP1989111128 U JP 1989111128U JP 11112889 U JP11112889 U JP 11112889U JP 2514075 Y2 JP2514075 Y2 JP 2514075Y2
- Authority
- JP
- Japan
- Prior art keywords
- split
- pair
- current transformer
- core
- mold
- 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.)
- Expired - Lifetime
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- Transformers For Measuring Instruments (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、架空線の高圧電路に取付ける分割型変流器
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a split type current transformer mounted on a high-voltage path of an overhead wire.
従来の高圧用分割型変流器には、第８図示のように電
線を通すための窓孔１を形成するように成形された一対
の分割型モールドケース2,3の肉厚内部に分割型コア4,5
とそれらに巻き付けるコイル6,7とを埋設したものや、
第９図示のように分割型コアケース8,9に分割型コア10,
11と、この各コア10,11に巻き付けたコイル12,13を内蔵
し、一方のコアケース９には、中空のアーム14を設け、
他方のコアケース８には、アーム14の中空部にスライド
自在に挿通するパイプ状のアーム15を設けたものがあ
る。In the conventional high pressure split type current transformer, as shown in FIG. 8, a split type is formed inside a pair of split type mold cases 2 and 3 formed to form a window 1 for passing an electric wire. Core 4,5
And those with embedded coils 6 and 7 wound around them,
As shown in the ninth drawing, the split core cases 8 and 9 are attached to the split core 10,
11 and coils 12 and 13 wound around these cores 10 and 11 are built in, and a hollow arm 14 is provided in one core case 9.
The other core case 8 is provided with a pipe-shaped arm 15 which is slidably inserted into the hollow portion of the arm 14.
上記従来の高圧用分割型変流器のうち、第８図示の変
流器では、分割型コア4,5がそれらの分割箇所で磁気的
に閉磁路とならず、エアギャップツ付きの変流器として
働く。そのため、変流器に鉄系金属が近づいたり、被検
出相以外の１次導体が近づいたりすると、出力電流が変
わり、3CT方式で零相電流を検出する場合、地絡電流の
検出感度電流に影響を与えるという問題点があり、第９
図示の変流器では、下側のコアケース９内のコイル13に
接続するリード線16が上側のコアケース８のアーム15の
側壁に穿設した開口部17を通り、接続部18でコイル12,1
3同志が接続されたいたため、変流器の窓孔１内の近く
でリード線16の一部がコアケース９の外部に引き出さ
れ、沿面距離が十分に取れないし、また第10図示のよう
に変流器の窓孔１に電線、すなわち一次導体19を挿通さ
せると、絶縁破壊電圧が低下し、分割型コア10と一次導
体19との間にコロナ放電20が発生し、危険であるばかり
でなく、変流器が故障するなどの問題点があった。In the current transformer shown in FIG. 8 among the above-mentioned conventional high pressure split type current transformers, the split type cores 4 and 5 do not magnetically form a closed magnetic path at the split points, and a current transformer with an air gap is provided. Work as a container. Therefore, when the iron-based metal approaches the current transformer or the primary conductor other than the detected phase approaches, the output current changes, and when the zero-phase current is detected by the 3CT method, it becomes the detection sensitivity current of the ground fault current. There is a problem of affecting,
In the illustrated current transformer, the lead wire 16 connected to the coil 13 in the lower core case 9 passes through the opening 17 formed in the side wall of the arm 15 of the upper core case 8, and the coil 12 is connected at the connecting portion 18. , 1
3 Since they were connected, part of the lead wire 16 was pulled out to the outside of the core case 9 near the window hole 1 of the current transformer, and the creepage distance was not sufficient, and as shown in FIG. When an electric wire, that is, the primary conductor 19 is inserted through the window hole 1 of the current transformer, the dielectric breakdown voltage decreases, and corona discharge 20 occurs between the split core 10 and the primary conductor 19, which is not only dangerous. However, there was a problem that the current transformer failed.
本考案は、上記従来の問題点を一挙に解消しうる高圧
用分割型変流器を提供することを目的とするものであ
る。An object of the present invention is to provide a high voltage split type current transformer which can solve the above-mentioned conventional problems all at once.
本考案は、高圧電路に取付ける分割型変流器におい
て、変流器の窓孔を形成するように成形した一対の分割
型モールドケースには、分割型コアであって、複数の薄
板を積層し、かつ一方のコアの突き合せ端部と、他方の
コアの突き合せ端部とが互いに重合するように嵌合され
る分割型コアを挿入した中空部を設け、この分割型コア
に巻き付けるコイルを上記一対のモールドケースの肉厚
内に埋設し、上記一対のモールドケースには、一対のア
ームであって、一方のアームが他方のアームに対して上
記一対のモールドケースを開閉する方向に摺擦するよう
に接合したアームの一端を結合し、上記コイルに接続す
るリード線を上記各アーム内に通し、各アームの他端か
ら引き出し、上記一対のモールドケースの窓孔の内面と
上記分割型コアの突き合せ端部との間には、静電塗料な
ど103.Ωcm〜109Ωcmの高抵抗物質で接触面を設けるこ
とを特徴とするものである。According to the present invention, in a split type current transformer attached to a high-voltage path, a pair of split type molded cases formed to form a window of the current transformer are split type cores, and a plurality of thin plates are laminated. , And a hollow portion into which a split core is inserted so that the abutting end of one core and the abutting end of the other core are overlapped with each other, and a coil to be wound around the split core is provided. It is embedded within the thickness of the pair of mold cases, and the pair of mold cases has a pair of arms, and one arm rubs against the other arm in a direction of opening and closing the pair of mold cases. So as to join one end of each arm, lead wires for connecting to the coil are passed through each of the arms, and pulled out from the other end of each of the arms, the inner surfaces of the window holes of the pair of mold cases and the split core. Butt Between the allowed end, it is characterized in providing a contact surface with a high-resistance material 10 3. Ωcm~10 9 Ωcm or electrostatic coating.
上記の構成より成る高圧用分割型変流器では、一対の
モールドケースを閉じた状態において一対の分割型コア
がそれらの分割箇所で磁気的に閉磁路となり、鉄系金属
や被測定１次導体が近づいても、出力電流が変わらず、
また変流器の窓孔とリード線の引出口との沿面距離が十
分にとれ、沿面コロナ放電の発生を防止し、また一次導
体と分割型コアの突き合せ端部の間が高抵抗物質の接触
面によって接続されるため、高電圧のほぼ全電圧がコア
とコイルの間にかかり、所定の破壊電圧をもたせること
ができる。特に高抵抗物質の接続面を静電塗料の塗布に
よって形成すると、静電塗料は数十ＭΩのため、危険で
なく、しかも接続面に部分的な剥離が生じても、剥離部
分の周辺の抵抗も高いので、全電圧が剥離部分にかから
ず、コロナ放電の発生を防止できる。In the high voltage split type current transformer having the above structure, the pair of split type cores magnetically form a closed magnetic circuit at the split points in the state where the pair of mold cases are closed, and the iron-based metal or the primary conductor to be measured. The output current does not change even when the
In addition, the creepage distance between the window of the current transformer and the outlet of the lead wire is sufficient to prevent the occurrence of creeping corona discharge, and there is a high resistance material between the abutting ends of the primary conductor and split core. Since they are connected by the contact surface, almost all the high voltage is applied between the core and the coil, so that a predetermined breakdown voltage can be provided. Especially when the connection surface of a high resistance material is formed by applying electrostatic paint, the electrostatic paint is several tens of MΩ, so it is not dangerous, and even if partial peeling occurs on the connection surface, the resistance around the peeled part Since it is also high, the total voltage is not applied to the peeled portion, and the occurrence of corona discharge can be prevented.
以下図面第１図ないし第７図にもとづいて本考案の実
施例を説明すると、21は分割型変流器で、電線を通すた
めの窓孔22を形成する一対の分割型モールドケース23,2
4に分割型コア25,26を挿入した中空部27,28を設け、コ
ア25,26に巻き付けるコイル29,30をモールドケース23,2
4の肉厚内に埋設してなる。コア25、26には、複数の薄
板を積層し、かつ一方のコア25の突き合せ端部と、他方
のコア26の突き合せ端部とが互いに重合するように嵌合
されるものを使用する。31,32はモールドケース23,24を
開閉する方向に摺擦するように接合したアームで、この
各アーム31,32の一端をモールドケース23,24に一体に結
合してある。33はアーム31,32を挿通したグリップ筒
で、アーム32にグリップ筒33をビス34で固定し、アーム
31をグリップ筒33に摺動自在に挿通してある。35は回転
ツマミで、アーム31,32の外周に刻設したねじ溝36に螺
合させてある。グリップ筒33を一方の手で握り、もう一
方の手で回転ツマミ35を正逆回転させると、アーム32が
アーム31に対して摺擦しつつ往復移動すると同時に、モ
ールドケース23がモールドケース24に対して開閉移動す
る。37,38はコイル29,30に接続したリード線で、アーム
31,32の内部に通し、アーム31,32の他端から引き出して
ある。第６図において39はモールドケース23において窓
孔22の内面とコア25の各付き合せ端部40,40との間を静
電気的に接触するように塗布してなる静電塗料塗布面、
第６図において41はモールドケース24において窓孔22の
内面とコア26の各突き合せ端部42,42との間を静電気的
に接触するように塗布してなる静電気塗料塗布面で、こ
れらの静電気塗料には、103.Ωcm〜109Ωcmの固有抵抗
率を有する塗料を使用する。静電塗料塗布面39は第７図
示のようにモールドケース23の分割面の一部に設けるほ
か、同分割面の全部に設けることもある。静電塗料塗布
面41もモールドケース24の分割面の一部に設けるほか、
同分割面の全部に設けることもある。なお静電塗料塗布
面39,41は、静電性を有するテープその他の高抵抗物質
と置換することもある。An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. Reference numeral 21 denotes a split type current transformer, which is a pair of split type molded cases 23, 2 forming a window hole 22 for passing an electric wire.
The hollow parts 27 and 28 in which the split cores 25 and 26 are inserted are provided in the coil 4, and the coils 29 and 30 wound around the cores 25 and 26 are molded cases 23 and 2.
It is buried within the wall thickness of 4. For the cores 25 and 26, a plurality of thin plates are laminated, and one in which the abutting end of one core 25 and the abutting end of the other core 26 are fitted so as to overlap each other are used. . Reference numerals 31 and 32 denote arms joined to each other so as to slide in the directions of opening and closing the mold cases 23 and 24, and one ends of the arms 31 and 32 are integrally coupled to the mold cases 23 and 24. 33 is a grip cylinder in which the arms 31 and 32 are inserted, and the grip cylinder 33 is fixed to the arm 32 with screws 34,
The grip cylinder 33 is slidably inserted into the grip cylinder 33. A rotary knob 35 is screwed into a thread groove 36 formed on the outer circumference of the arms 31 and 32. When the grip tube 33 is gripped with one hand and the rotary knob 35 is rotated forward and backward with the other hand, the arm 32 moves back and forth while rubbing against the arm 31, and at the same time, the mold case 23 moves to the mold case 24. It opens and closes. 37 and 38 are lead wires connected to the coils 29 and 30 and are arm
It passes through the inside of 31, 32 and is drawn out from the other ends of the arms 31, 32. In FIG. 6, reference numeral 39 designates an electrostatic paint application surface which is applied so that the inner surface of the window hole 22 and each of the mating end portions 40, 40 of the core 25 in the mold case 23 make electrostatic contact.
In FIG. 6, reference numeral 41 denotes an electrostatic paint application surface which is applied so that the inner surface of the window hole 22 and the abutting ends 42, 42 of the core 26 in the mold case 24 are in electrostatic contact with each other. For the electrostatic paint, use a paint having a specific resistance of 10 3. Ωcm to 10 9 Ωcm. The electrostatic paint application surface 39 may be provided on a part of the divided surface of the mold case 23 as shown in FIG. 7 or may be provided on the entire divided surface. The electrostatic paint application surface 41 is also provided on a part of the divided surface of the mold case 24,
It may be provided on all of the divided surfaces. The electrostatic paint application surfaces 39, 41 may be replaced with a tape or other high resistance material having electrostatic properties.
本考案は、叙上のように構成したから、次のような効
果を奏する。Since the present invention is configured as described above, it has the following effects.
一対のモールドケースを閉じた状態において、一対
の分割型コアがそれらの分割箇所で磁気的に閉磁路とな
るため、高感度の高圧用分割型変流器を製作することが
できる。In the state where the pair of mold cases are closed, the pair of split cores magnetically form a closed magnetic circuit at the split portions, so that a high-sensitivity split high-voltage transformer can be manufactured.
一対の分割型コアに重ね合せ嵌合式のものを使用
し、かつ一対のモールドケースにそれらを開閉するアー
ムを結合することによって、分割型コアの突き合せ端部
同志の重ね合せ嵌合を確実にし、嵌合時の強さに殆ど影
響を受けることのない高感度の高圧用分割型変流器を製
作することができる。By using a pair of split-type cores with overlapping fitting type, and by connecting an arm that opens and closes them to a pair of mold cases, the overlapping ends of the split-type cores can be securely fitted together. It is possible to manufacture a high-sensitivity split type current transformer that is hardly affected by the strength at the time of fitting.
変流器の窓孔に高圧電路の電線を挿通させた状態に
おいて、電線とコイルの引出部との間の沿面コロナ放電
の発生を防止することができる。It is possible to prevent the occurrence of creeping corona discharge between the electric wire and the lead-out portion of the coil when the electric wire of the high-voltage path is inserted into the window hole of the current transformer.
リード線の露出部分をなくし、モールドケース内で
処理したため、変流器の開閉の途中でもリード線が露出
せず、安全であり、変流器を実線路に取付けた状態で
は、モールドケース内へ雨水などの侵入を防ぐパッキン
が不要になる。Since the exposed part of the lead wire is removed and processed in the mold case, it is safe because the lead wire is not exposed even during the opening and closing of the current transformer, and it is safe to put it inside the mold case with the current transformer attached to the actual line. No packing is required to prevent rainwater from entering.
変流器の窓孔に高圧電路の電線が挿通された状態に
おいて、静電塗料などの接触面により電線と分割型コア
の付き合せ端部との間にコロナ放電が発生するのを防止
できるので、高電圧の殆どがコアとコイルの間にかか
り、設計値通りの高電圧に耐えることができる。静電塗
料は電気抵抗値が数十ＭΩと高いため、部分的に塗料の
剥離などの問題が起きても、そこにかかる電圧が低く、
分担されるため、コロナ放電の発生を防止できる。Since the contact surface of electrostatic paint can prevent corona discharge from occurring between the wire and the mating end of the split core when the wire of the high-voltage path is inserted into the window of the current transformer. Most of the high voltage is applied between the core and the coil, and it can withstand the high voltage as designed. Since electrostatic paint has a high electric resistance value of several tens of MΩ, even if problems such as paint peeling occur partially, the voltage applied there is low,
Since it is shared, the occurrence of corona discharge can be prevented.
図面第１図ないし第７図は本考案の実施例を示すもの
で、第１図は一対のモールドケースの中空部に分割型コ
アを挿入した状態の断面図、第２図は一対のモールドケ
ースの中空部から分割型コアを取外した状態の断面図、
第３図は第２図のＡ−Ａ線断面図、第４図は一対のモー
ルドケースにアームを結合した状態の側面図、第５図は
上記アームの操作によって変流器が開かれた状態を示す
図、第６図は変流器の窓孔に静電塗料塗布面を設けた状
態の断面図、第７図は静電塗料塗布面を設けたモールド
ケースの分割面を示す図、第８図は従来の高圧用分割型
変流器の一例を示す断面図、第９図は同変流器の別の例
を示す図、第10図は同変流器においてコロナ放電の発生
を説明する図である。 21……分割型変流器、22……窓孔、23、24……分割型モ
ールドケース、25、26……分割型コア、27、28……中空
部、29、30……コイル、31、32……アーム、37、38……
リード線、39、41……静電塗料塗布接触面。1 to 7 show an embodiment of the present invention. FIG. 1 is a cross-sectional view of a pair of mold cases in which a split core is inserted into a hollow portion, and FIG. 2 is a pair of mold cases. Sectional view of the split core removed from the hollow part of
FIG. 3 is a sectional view taken along the line AA of FIG. 2, FIG. 4 is a side view of a state in which an arm is connected to a pair of mold cases, and FIG. 5 is a state in which the current transformer is opened by the operation of the arm. FIG. 6 is a cross-sectional view showing a state in which a window for a current transformer is provided with an electrostatic coating material, and FIG. 7 is a diagram showing a divided surface of a mold case provided with the electrostatic coating surface. FIG. 8 is a cross-sectional view showing an example of a conventional high pressure split type current transformer, FIG. 9 is a view showing another example of the current transformer, and FIG. 10 is a diagram showing the occurrence of corona discharge in the current transformer. FIG. 21 …… Split current transformer, 22 …… Window hole, 23,24 …… Split mold case, 25,26 …… Split core, 27,28 …… Hollow part, 29,30 …… Coil, 31 , 32 …… Arm, 37, 38 ……
Lead wire, 39, 41 ... Contact surface for electrostatic paint application.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 鳥飼 孝幸 福岡県福岡市南区清水４丁目19番地の18 号 九州電機製造株式会社内 (72)考案者 武末 高明 福岡県福岡市南区清水４丁目19番地の18 号 九州電機製造株式会社内 (72)考案者 入江 喜一郎 福岡県福岡市南区清水４丁目19番地の18 号 九州電機製造株式会社内 (72)考案者 岩橋 誠二 福岡県福岡市南区清水４丁目19番地の18 号 九州電機製造株式会社内 (72)考案者 村上 與 熊本県熊本市城東町４番７号 九州電力 株式会社熊本営業所内 (72)考案者 二宮 司 佐賀県佐賀市天神１丁目４番３号 九州 電力株式会社佐賀営業所内 (56)参考文献 実開 昭54−41278（ＪＰ，Ｕ) 実開 昭58−166018（ＪＰ，Ｕ) 実開 平１−127226（ＪＰ，Ｕ) 実公 平５−37462（ＪＰ，Ｙ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takayuki Torikai No.18, 4-19 Shimizu, Minami-ku, Fukuoka-shi, Fukuoka Prefecture Kyushu Electric Manufacturing Co., Ltd. (72) Takaaki Takesue 4 Shimizu, Minami-ku, Fukuoka-shi, Fukuoka Kyushu Electric Manufacturing Co., Ltd. at No. 18-chome (72) Inventor Kiichiro Irie No. 18 Shimizu, Minami-ku, Fukuoka-shi, Fukuoka Prefecture No. 18 at Kyushu Electric-Manufacturing Co., Ltd. (72) Seiji Iwahashi Fukuoka, Fukuoka No.18, 4-19 Shimizu, Minami-ku, Kyushu Electric Manufacturing Co., Ltd. (72) Inventor: Murakami, 4-7 Jotomachi, Kumamoto City, Kumamoto Prefecture Kyushu Electric Power Co., Inc., Kumamoto Sales Office (72) Creator: Ninomiya Saga, Saga Prefecture 1-4-3 Tenjin, Ichi, Kyushu Electric Power Co., Inc. (Saga Sales Office) (56) References Showa 54-41278 (JP, U) Showa 58-166018 (JP, U) Showa 1 -127226 (JP, U) Actual Kohei 5-37462 (JP, Y2)
Claims (1)
て、変流器の窓孔を形成するように成形した一対の分割
型モールドケースには、分割型コアであって、複数の薄
板を積層し、かつ一方のコアの突き合せ端部と、他方の
コアの突き合せ端部とが互いに重合するように嵌合され
る分割型コアを挿入した中空部を設け、この分割型コア
に巻き付けるコイルを上記一対のモールドケースの肉厚
内に埋設し、上記一対のモールドケースには、一対のア
ームであって、一方のアームが他方のアームに対して上
記一対のモールドケースを開閉する方向に摺擦するよう
に接合したアームの一端を結合し、上記コイルに接続す
るリード線を上記各アーム内に通し、各アームの他端か
ら引き出し、上記一対のモールドケースの窓孔の内面と
上記分割型コアの突き合せ端部との間には、103Ωcm〜1
09Ωcmの高抵抗物質で接触面を設けることを特徴とする
高圧用分割型変流器。1. A split-type current transformer attached to a high-voltage path, wherein a pair of split-type mold cases formed to form a window of the current transformer are split-type cores and a plurality of thin plates are laminated. And a hollow portion into which a split core is inserted so that the abutting end of one core and the abutting end of the other core overlap with each other is provided, and a coil wound around this split core Embedded in the wall thickness of the pair of mold cases, and the pair of mold cases has a pair of arms, and one arm slides in a direction of opening and closing the pair of mold cases with respect to the other arm. The one ends of the arms joined by rubbing are joined together, the lead wire for connecting to the coil is passed through each of the arms, and pulled out from the other end of each of the arms, and the inner surfaces of the window holes of the pair of mold cases and the split mold Core ram Between the mating end, 10 3 Ωcm~1
A high voltage split type current transformer characterized by having a contact surface made of a high resistance material of 0 9 Ωcm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989111128U JP2514075Y2 (en) | 1989-09-22 | 1989-09-22 | High voltage split current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989111128U JP2514075Y2 (en) | 1989-09-22 | 1989-09-22 | High voltage split current transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0350313U JPH0350313U (en) | 1991-05-16 |
| JP2514075Y2 true JP2514075Y2 (en) | 1996-10-16 |
Family
ID=31659625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989111128U Expired - Lifetime JP2514075Y2 (en) | 1989-09-22 | 1989-09-22 | High voltage split current transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2514075Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005191399A (en) * | 2003-12-26 | 2005-07-14 | Hioki Ee Corp | Measured-conductor positioning adaptor for clamping sensor |
| WO2008026281A1 (en) * | 2006-08-31 | 2008-03-06 | Mitsubishi Electric Corporation | Inductive coupling device |
| JP5353618B2 (en) * | 2009-10-09 | 2013-11-27 | Ｊｆｅスチール株式会社 | Reactor iron core parts |
| JP2021125556A (en) * | 2020-02-05 | 2021-08-30 | Ｎｅｃマグナスコミュニケーションズ株式会社 | Split type current transformer and case for split type current transformer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754990Y2 (en) * | 1988-02-24 | 1995-12-18 | 中部電力株式会社 | Split core type current transformer |
-
1989
- 1989-09-22 JP JP1989111128U patent/JP2514075Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0350313U (en) | 1991-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
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| EXPY | Cancellation because of completion of term |