JP3048851B2 - Through-type current transformer - Google Patents
Through-type current transformerInfo
- Publication number
- JP3048851B2 JP3048851B2 JP6216622A JP21662294A JP3048851B2 JP 3048851 B2 JP3048851 B2 JP 3048851B2 JP 6216622 A JP6216622 A JP 6216622A JP 21662294 A JP21662294 A JP 21662294A JP 3048851 B2 JP3048851 B2 JP 3048851B2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- current transformer
- layer
- insulating
- type current
- 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 - Fee Related
Links
Landscapes
- Insulating Of Coils (AREA)
- Transformers For Measuring Instruments (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、密閉形ガス絶縁開閉装
置（以下、ＧＩＳと称す。）等に組み込まれる貫通形変
流器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a through current transformer incorporated in a closed gas insulated switchgear (hereinafter referred to as GIS) or the like.
【０００２】[0002]
【従来の技術】従来の貫通形変流器として、実公平１−
２４９２３号に提案されたものがある。これは、絶縁物
を介して巻線が複数層巻回された環状鉄心の外周部に絶
縁物を被覆し、さらにその外周に自己融着性を有する絶
縁テープを巻き付けて形成したものである。この絶縁テ
ープは防水性と防湿性を備えているため、貫通形変流器
内部への水分の侵入を防止して絶縁性の低下を防止する
ことができる。また、環状鉄心周囲に巻回される巻線の
層と層との間を絶縁する絶縁物としては、油浸紙、綿テ
ープ、ポリエステルフィルム等が用いられている。2. Description of the Related Art A conventional through current transformer is disclosed in
No. 24923 has been proposed. This is formed by covering an outer peripheral portion of an annular core having a plurality of windings wound with an insulator through an insulator, and further wrapping an outer peripheral portion thereof with an insulating tape having a self-fusing property. Since this insulating tape has waterproofness and moistureproofness, it is possible to prevent moisture from entering the inside of the through-type current transformer, thereby preventing a decrease in insulating properties. Oil-immersed paper, cotton tape, polyester film, or the like is used as an insulator that insulates between layers of the winding wound around the annular core.
【０００３】[0003]
【発明が解決しようとする課題】ところで、この貫通形
変流器がＧＩＳに組み込まれる場合は、六弗化硫黄（Ｓ
Ｆ6）ガス等の電気絶縁性を有する気体とともに容器内
に密封される。ＳＦ6ガスの封入に際しては、ＳＦ6ガス
の純度を保つため、貫通形変流器等の構成部品をＧＩＳ
の容器内に組み込んだ後、いったん容器を真空引きして
からＳＦ6ガスを注入するという方法がとられている。
しかしながら、この真空引きの際、貫通形変流器の外表
面を覆う絶縁テープの気密性が不完全であると、貫通形
変流器内部の間隙に存在する空気が絶縁テープ自体や隙
間を透過して外部に放出され、所定の真空度に到達する
までの所要時間が長くなる。更に、ＳＦ6ガスの注入後
も微小ではあるが貫通形変流器内部から空気が放出さ
れ、そのためＳＦ6ガスの純度が次第に低下して絶縁性
が損なわれるという問題があった。In the case where this through-type current transformer is incorporated in a GIS, it is difficult to use sulfur hexafluoride (S
F 6 ) It is sealed in a container together with a gas having electric insulation such as gas. Upon encapsulation of SF 6 gas, to maintain the purity of SF 6 gas, GIS components such as through-type current transformer
After being assembled in a container, the container is once evacuated and then SF 6 gas is injected.
However, during this evacuation, if the airtightness of the insulating tape covering the outer surface of the through-type current transformer is incomplete, the air existing in the gap inside the through-type current transformer permeates through the insulating tape itself and the gap. Then, the time required to reach the predetermined degree of vacuum is extended. Furthermore, even though the SF 6 gas is injected, air is released from the inside of the through-type current transformer although it is very small, so that there is a problem that the purity of the SF 6 gas gradually decreases and the insulation property is impaired.
【０００４】また、貫通形変流器を保護継電器用に用い
る場合は、一次側母線に短絡電流が流れると巻線の端子
間の誘起電圧が数万ボルトに達することもある。そのた
め、層間絶縁物を幾重にも重ねたり、ワニスを含浸させ
たりして絶縁性を増し耐電圧試験に合格させなければな
らず、製作工程が複雑になるという問題があった。本発
明は上記問題点を解決するためになされたもので、その
目的とするところは、貫通形変流器をＧＩＳ等に組み込
む場合の真空引きの時間を短縮するとともに、封入され
た絶縁ガスの絶縁性が損なわれることのない貫通形変流
器を提供することにある。また、簡単な製作工程で耐電
圧の高い貫通形変流器を提供することにある。[0004] When a through-type current transformer is used for a protective relay, if a short-circuit current flows through the primary bus, the induced voltage between the terminals of the windings may reach tens of thousands of volts. For this reason, there is a problem that the insulating process has to be increased and the withstand voltage test has to be passed by stacking the interlayer insulators many times or impregnating with varnish, and the manufacturing process is complicated. The present invention has been made to solve the above problems, As a
It is a purpose, as well as to shorten the evacuation time when incorporating the through-type current transformer in GIS or the like, to provide a never insulative encapsulated insulating gas is impaired through type current transformer It is in. Another object is to provide a high through-type current transformer withstand voltage in easy single fabrication process.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、環状鉄心に複数層巻回される巻線の層間
及び最外層の巻線の全表面に、セミキュアエポキシ樹脂
層が両面に形成されたテトロンクロス製テープを順に重
複させながら巻き付けた後、加熱してセミキュアエポキ
シ樹脂層を硬化させ、巻線の層間に連続した絶縁層を形
成すると共に、全表面を覆う連続した遮蔽層を形成した
ことを特徴とする。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a method of manufacturing a multi-layer structure in which a plurality of layers are wound around an annular core.
And semi-cured epoxy resin on the entire surface of the outermost winding
Tetron cloth tape with layers formed on both sides
After wrapping it while wrapping it, heat it to make it semi-cured
The resin layer is cured to form a continuous insulating layer between the winding layers.
And a continuous shielding layer covering the entire surface.
【０００６】[0006]
【作用】本発明においては、環状鉄心に各層の巻線が巻
回されるごとに、セミキュアエポキシ樹脂層が両面に形
成されたテトロンクロス製テープを、その巻線の全表面
に順に重複させながら巻き付け、最外層の巻線の全表面
にも巻き付ける。次に、巻線及びテープの巻付けが済ん
だ部材を加熱してテープ両面のセミキュアエポキ シ樹脂
層を硬化させることにより、複数層巻回された巻線の各
層ごと及び最外層の巻線の全表面を覆う連続した硬化樹
脂層を形成する。この硬化樹脂層は、絶縁層及び遮蔽層
として絶縁性を向上させる機能と機密性を向上させる機
能とを併せ持つので、複数層巻回される巻線の各層を絶
縁しながら遮蔽し、最外層の巻線の全表面を覆う連続し
た遮蔽層と相まって多段的に内部と外部を完全に隔離
し、貫通形変流器の内部空気が外部に放出されるのを抑
える。そのため、貫通形変流器がＧＩＳ等に組み込まれ
る際の真空引きの時間が短縮されると共に、組み込み後
も絶縁ガスの純度が保たれて絶縁ガスの絶縁性低下が防
止される。 According to the present invention, the winding of each layer is wound around the annular core.
With each turn, a semi-cured epoxy resin layer forms on both sides
The resulting Tetron cloth tape is applied to the entire surface of the winding.
Winding while overlapping in order, the entire surface of the outermost layer winding
Wrap it around. Next, the winding and tape winding are completed.
Semi Cure Epoxy resin sided tape by heating it member
By curing the layers, each of the windings wound in multiple layers
A continuous hardened tree covering the entire surface of each layer and the outermost winding
A grease layer is formed. This cured resin layer includes an insulating layer and a shielding layer.
As a function to improve insulation and a machine to improve confidentiality
Function, so that each layer of the winding wound in multiple layers is
A continuous shield covering the entire surface of the outermost winding
Complete isolation between inside and outside in multiple steps in combination with a transparent shielding layer
To prevent the air inside the through current transformer from being released to the outside.
I can. Therefore, through-type current transformers are incorporated in GIS, etc.
Time for evacuation during
Also maintains the purity of the insulating gas, preventing the insulating gas from deteriorating.
Sealed Ru.
【０００７】[0007]
【実施例】以下、図に沿って本発明の実施例を説明す
る。図１は本発明に係る貫通形変流器の実施例の構造を
模式的に示した部分断面図である。図において、１は環
状鉄心であり、その外周が絶縁物２により被覆され、そ
の周囲に巻線３が巻回されている。この巻線３が複数層
巻回される際、巻線の各層間及び最外層の巻線３の全表
面には絶縁テープ４が巻き付けられている。この絶縁テ
ープ４は、後に加熱処理されて絶縁層または遮蔽層が形
成される。図２は絶縁テープ４の拡大断面図であり、テ
ープ本体５は絶縁性を有するテトロンクロスからなる。
テープ本体５の両側には、熱硬化性樹脂であるセミキュ
アエポキシ樹脂が塗布されて樹脂層６，７が形成されて
いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional view schematically showing the structure of an embodiment of a through-type current transformer according to the present invention. In the figure, reference numeral 1 denotes an annular core, the outer periphery of which is covered with an insulator 2, and a winding 3 is wound therearound. All tables in this case the windings 3 are wound multiple layers wound, between the layers of the winding and the outermost layer of the winding 3
An insulating tape 4 is wound around the surface . The insulating tape 4 is subsequently subjected to a heat treatment to form an insulating layer or a shielding layer. FIG. 2 is an enlarged cross-sectional view of the insulating tape 4, and the tape main body 5 is made of insulating tetron cloth.
Resin layers 6 and 7 are formed on both sides of the tape body 5 by applying a semi-cured epoxy resin as a thermosetting resin.
【０００８】次に、図１の貫通形変流器の製造工程につ
いて説明する。先ず最初に、環状鉄心１の外周を絶縁物
２により被覆した後に、巻線３を巻回する。さらにその
外側に、３層構造をした絶縁テープ４を巻き付ける。こ
のとき、先に巻き付けた絶縁テープ４に、次の絶縁テー
プ４の一部を重ねていくことにより、絶縁テープ４の上
面の樹脂層６の一部に下面の樹脂層７の一部が密着され
る。こうして、環状鉄心１の周囲に順に絶縁テープ４を
巻き付けていくことにより、変流器の全表面が絶縁テー
プ４の樹脂層６，７により連続して覆われる。Next, the manufacturing process of the through-type current transformer shown in FIG. 1 will be described. First, after covering the outer periphery of the annular core 1 with the insulator 2, the winding 3 is wound. Further, an insulating tape 4 having a three-layer structure is wound around the outside thereof. At this time, a part of the lower insulating resin layer 7 adheres to a part of the upper insulating resin layer 6 by superposing a part of the next insulating tape 4 on the previously wound insulating tape 4. Is done. By winding the insulating tape 4 around the annular core 1 in this way, the entire surface of the current transformer is continuously covered with the resin layers 6 and 7 of the insulating tape 4.
【０００９】ここで、巻線３の周囲に絶縁テープ４が巻
き付けられた部材全体を加熱して、樹脂層６，７を互い
に融着させ、さらに硬化させることにより、最外層の巻
線３の全表面を連続して覆う遮蔽層を形成する。この遮
蔽層が変流器の内部と外部を完全に遮断するため、貫通
形変流器をＧＩＳ等に組み込むときの真空引きでは、貫
通形変流器の周囲が減圧されても、内部の巻線３等の微
小間隙に残留している空気が外部に放出されない。その
ため、短時間で所定の真空度に到達することができて、
組み込み作業の能率が向上する。Here, the entire member around which the insulating tape 4 is wound around the winding 3 is heated so that the resin layers 6 and 7 are fused together and further cured, whereby the outermost layer is wound.
A shielding layer that continuously covers the entire surface of the line 3 is formed. Since the shielding layer is completely cut off the internal and external current transformer, the vacuum when incorporating a through-type current transformer in GIS or the like, also around the through-type current transformer is vacuum inside the winding Air remaining in the minute gap such as the line 3 is not released to the outside. Therefore, it is possible to reach a predetermined degree of vacuum in a short time,
Efficiency of installation work is improved.
【００１０】また、ＳＦ6ガス等の絶縁ガスがＧＩＳに
注入された後、長期間を経ても、貫通形変流器の内部か
ら空気が放出されることがないため、絶縁ガスの純度が
保たれてＧＩＳ内の絶縁性が保持される。なお、このよ
うに外周部に完全な遮蔽層を形成した貫通形変流器とし
ては、従来にも樹脂注型法（モールドレジン形）がある
が、この実施例の貫通形変流器は樹脂注型法のように金
型や注型装置を用いることなく簡単な設備と工程で同等
の貫通形変流器を得ることができる。[0010] In addition, after the insulating gas such as SF 6 gas is injected into the GIS, air is not released from the inside of the through current transformer even after a long period of time, so that the purity of the insulating gas is maintained. The insulation in the GIS is maintained by leaning. As a through-type current transformer in which a complete shielding layer is formed on the outer periphery in this way, there is a resin casting method (mold resin type) in the past, but the through-type current transformer of this embodiment is a resin type. An equivalent through-type current transformer can be obtained with simple equipment and steps without using a mold or a casting apparatus as in the casting method.
【００１１】一方、複数層巻回される巻線３について説
明する。図３は、その巻線３の部分を拡大して示した断
面図である。図では、巻線８の層と巻線９の層の間に、
絶縁テープ４がそれぞれの縁を互いに重複させながら順
に巻き付けられている。この絶縁テープ４が後に加熱さ
れることにより、絶縁テープ４の樹脂層６，７が互いに
融着して隣り合う絶縁テープ４が硬化し連続した絶縁層
が形成される。 On the other hand, the winding 3 wound in a plurality of layers will be described.
I will tell. FIG. 3 is an enlarged cross-sectional view of the winding 3. In the figure, between the layer of the winding 8 and the layer of the winding 9,
The insulating tape 4 is wound in order with the respective edges overlapping each other. When the insulating tape 4 is heated later, the resin layers 6 and 7 of the insulating tape 4 are fused together, and the adjacent insulating tapes 4 are cured to form a continuous insulating layer.
【００１２】ここで、樹脂層６，７は加熱されて硬化す
る直前に粘度が低下して液状となり、一部が絶縁テープ
４から巻線８，９の表面に流出して皮膜を形成する。そ
の結果、巻線８，９の層に存在するピンホールが埋めら
れてしまうという効果が得られる。こうして、絶縁テー
プ４が用いられて巻線８，９を覆う連続した一体構造の
絶縁層が形成されることにより、巻線８の層と巻線９の
層との間の絶縁性が増し、耐電圧が高くなる。なお、絶
縁テープ４のテープ本体５には、テトロンクロス以外の
均等物としてポリエステルフィルムを用いても良い。 Here, the resin layers 6 and 7 decrease in viscosity immediately before being cured by being heated and become liquid, and a part thereof flows out of the insulating tape 4 to the surfaces of the windings 8 and 9 to form a film. As a result, an effect is obtained that the pinholes existing in the layers of the windings 8 and 9 are filled. In this way, by using the insulating tape 4 to form a continuous and integral insulating layer that covers the windings 8, 9, the insulation between the layer of the winding 8 and the layer of the winding 9 increases, The withstand voltage increases. Note that the tape body 5 of insulating tape 4, except Tetron cloth
A polyester film may be used as an equivalent .
【００１３】図４は、巻線３の部分が多層である場合
に、巻線８の層と巻線９の層との間で発生する絶縁破壊
を模式的に示した説明図である。層間に巻き付けられた
絶縁テープ４が加熱硬化される前の状態では、互いに一
体化されていない絶縁テープ４の継ぎ目を伝わって沿面
破壊Ａが発生することを示す。一方、絶縁テープ４を加
熱硬化した後は、絶縁テープ４が連続して一体となって
絶縁層が形成されるため、巻線８と巻線９との間に相当
な高電圧を印加した場合に、初めて厚みの薄い部分で貫
通破壊Ｂが発生することを示す。FIG. 4 is an explanatory view schematically showing the dielectric breakdown occurring between the layers of the winding 8 and the winding 9 when the winding 3 has a multilayer structure. In a state before the insulating tape 4 wound between the layers is heated and hardened, it indicates that creeping fracture A occurs along a seam of the insulating tape 4 which is not integrated with each other. On the other hand, after the insulating tape 4 is cured by heating, the insulating tape 4 is continuously and integrally formed to form an insulating layer. It is shown for the first time that a breakthrough B occurs in a thin portion.
【００１４】このように、複数層巻回される巻線の層間
を連続した絶縁層で覆うことにより、巻線間の沿面破壊
の発生が防止され、貫通形変流器の絶縁性を増すことが
可能になると共に、この絶縁層は巻線の各層ごとを遮蔽
する。なお、本発明の実施例の貫通形変流器は、ＧＩＳ
以外にも、油入変圧器、閉鎖盤等に組み込むことが可能
である。As described above, by covering the layers of the winding wound with a plurality of layers with a continuous insulating layer, the occurrence of creeping breakdown between the windings is prevented, and the insulation of the through-type current transformer is increased. is capable such Rutotomoni, the insulating layer shields the each layer of the winding
I do. The through-type current transformer according to the embodiment of the present invention is a GIS.
Also, can Komu set oil-filled transformers, the closure panel, etc. other than
It is.
【００１５】[0015]
【発明の効果】以上述べたように本発明によれば、内部
と外部を完全に遮断する連続した遮蔽層を外表面に形成
したことにより、貫通形変流器の内部空気が外部に放出
されることがなくなり、ＧＩＳ等へ組み込む際の真空引
きの時間が短縮されるとともに、組み込まれた後もＧＩ
Ｓ等へ封入された絶縁ガスの純度が保たれて絶縁性の低
下が防がれる。As described above, according to the present invention, since a continuous shielding layer for completely blocking the inside and the outside is formed on the outer surface, the air inside the through-type current transformer is discharged to the outside. The time required for evacuation when incorporating into GIS etc. is reduced, and the GI
The purity of the insulating gas sealed in S or the like is maintained, and a decrease in insulating properties is prevented.
【００１６】また、両面にセミキュアエポキシ樹脂層が
形成されたテトロンクロス製テープを順に重複させなが
ら各層の巻線に巻き付け、その後加熱して樹脂層を硬化
させて絶縁層を形成するという、比較的簡単な工程で巻
線間の絶縁性を増すことができる。In addition, a tape made of Tetron cloth having a semi-cured epoxy resin layer formed on both sides is wound around each layer winding while sequentially overlapping, and then heated to cure the resin layer to form an insulating layer. The insulation between the windings can be increased by a simple process.
【図１】本発明に係る実施例の貫通形変流器の構造を模
式的に示した部分断面図である。FIG. 1 is a partial cross-sectional view schematically showing the structure of a through-type current transformer according to an embodiment of the present invention.
【図２】図１の絶縁テープの拡大断面図である。FIG. 2 is an enlarged sectional view of the insulating tape of FIG.
【図３】図１の巻線の部分を拡大して示した断面図であ
る。FIG. 3 is an enlarged cross-sectional view showing a winding part of FIG. 1;
【図４】図３における絶縁破壊を模式的に示した説明図
である。FIG. 4 is an explanatory diagram schematically showing insulation breakdown in FIG. 3;
１ 環状鉄心 ２ 絶縁物 ３ 巻線 ４ 絶縁テープ ５ テープ本体 ６，７ 樹脂層 DESCRIPTION OF SYMBOLS 1 Annular core 2 Insulator 3 Winding 4 Insulating tape 5 Tape body 6, 7 Resin layer
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01F 27/32,38/28 H01F 41/02,41/12 Continuation of the front page (58) Field surveyed (Int.Cl. 7 , DB name) H01F 27 / 32,38 / 28 H01F 41 / 02,41 / 12
Claims (1)
及び最外層の巻線の全表面に、セミキュアエポキシ樹脂
層が両面に形成されたテトロンクロス製テープを順に重
複させながら巻き付けた後、加熱してセミキュアエポキ
シ樹脂層を硬化させ、巻線の層間に連続した絶縁層を形
成すると共に、全表面を覆う連続した遮蔽層を形成した
ことを特徴とする貫通形変流器。 An interlayer of a winding wound in a plurality of layers around an annular core.
And semi-cured epoxy resin on the entire surface of the outermost winding
Tetron cloth tape with layers formed on both sides
After wrapping it while wrapping it, heat it to make it semi-cured
The resin layer is cured to form a continuous insulating layer between the winding layers.
A through-type current transformer, wherein a continuous shielding layer covering the entire surface is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6216622A JP3048851B2 (en) | 1994-08-18 | 1994-08-18 | Through-type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6216622A JP3048851B2 (en) | 1994-08-18 | 1994-08-18 | Through-type current transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0864443A JPH0864443A (en) | 1996-03-08 |
| JP3048851B2 true JP3048851B2 (en) | 2000-06-05 |
Family
ID=16691324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6216622A Expired - Fee Related JP3048851B2 (en) | 1994-08-18 | 1994-08-18 | Through-type current transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3048851B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064015A (en) * | 2010-12-06 | 2011-05-18 | 保定天威集团有限公司 | Built-in current transformer without field drying |
| CN107677856A (en) * | 2017-08-01 | 2018-02-09 | 国网浙江省电力公司嘉兴供电公司 | A kind of GIS insulating basins superfrequency test interference shielding method and its device |
-
1994
- 1994-08-18 JP JP6216622A patent/JP3048851B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0864443A (en) | 1996-03-08 |
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