JPH0220810Y2 - - Google Patents
Info
- Publication number
- JPH0220810Y2 JPH0220810Y2 JP5267384U JP5267384U JPH0220810Y2 JP H0220810 Y2 JPH0220810 Y2 JP H0220810Y2 JP 5267384 U JP5267384 U JP 5267384U JP 5267384 U JP5267384 U JP 5267384U JP H0220810 Y2 JPH0220810 Y2 JP H0220810Y2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- voltage coil
- coils
- molded
- film material
- 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
Links
- 229920003002 synthetic resin Polymers 0.000 claims description 40
- 239000000057 synthetic resin Substances 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 15
- 238000009413 insulation Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical group [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
Landscapes
- Insulating Of Coils (AREA)
- Transformers For Measuring Instruments (AREA)
Description
【考案の詳細な説明】
〔考案の技術分野〕
本考案は２個以上のコイルを、同時に合成樹脂
にてモールドした計器用変圧器に関するものであ
る。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an instrument transformer in which two or more coils are simultaneously molded with synthetic resin.
従来、三相形計器用変圧器の中に、２個以上の
コイルを並置して合成樹脂にて一体にモールドし
たものがある。すなわち第１図に示すように、鉄
心１の外周に低圧コイル２を巻回しその外周に低
圧コイル２と所定の絶縁間隔を介し、高圧コイル
３を巻回した単相形の変成器中身を構成し、この
中身を２個並べて配置して合成樹脂４により一体
にモールドしたもので、各コイル２，２と３，３
はそれぞれ三相結線される。そして低圧コイル２
は、合成樹脂４の側面に露出した低圧端子５に接
続され、高圧コイル３は、合成樹脂４の上面に露
出した高圧端子６に接続されている。
Conventionally, some three-phase voltage transformers include two or more coils arranged side by side and integrally molded with synthetic resin. That is, as shown in FIG. 1, the contents of a single-phase transformer are constructed by winding a low-voltage coil 2 around the outer periphery of an iron core 1, and then winding a high-voltage coil 3 around the outer periphery of the low-voltage coil 2 with a predetermined insulating interval. , two of these contents are arranged side by side and integrally molded with synthetic resin 4, each coil 2, 2 and 3, 3.
are each connected in three phases. and low voltage coil 2
is connected to a low voltage terminal 5 exposed on the side surface of the synthetic resin 4, and the high voltage coil 3 is connected to a high voltage terminal 6 exposed on the top surface of the synthetic resin 4.
ところで、合成樹脂４は硬化する際、矢印Ａに
示す方向に収縮を生じ、この収縮によつて、高圧
コイル３と合成樹脂４との間に剥離を生じる場合
がある。また使用時の外気温の変化によつても、
銅やアルミニウムからなる高圧コイル３と合成樹
脂４との間の熱膨張係数の差により、高圧コイル
３と合成樹脂４との間に剥離を生じる場合があ
る。この剥離部分は、減圧下のために放電電圧が
低く、さらに大きい電圧が印加されると部分放電
が生じて絶縁劣化を詔き、ひいては絶縁破壊に至
るので、剥離を生じないようにする必要がある。
そこで、従来は高圧コイル３の外周に、合成樹脂
４と接着性の良好な、絶縁紙、ガラス、不織布、
テープ等の絶縁物７を巻回して高圧コイル３と合
成樹脂４との接着性を良好にしていた。しかしな
がら、この種三相形計器用変圧器の容量が大きく
なり、２個の中身の高圧コイル３，３間の所要絶
縁距離が増加した場合には、合成樹脂４の硬化収
縮によるストレスの方が絶縁物７の接着力に比し
大きくなつて高圧コイル３と合成樹脂４との間に
剥離を生じていた。 By the way, when the synthetic resin 4 hardens, it shrinks in the direction shown by arrow A, and this shrinkage may cause separation between the high voltage coil 3 and the synthetic resin 4. Also, due to changes in outside temperature during use,
Due to the difference in thermal expansion coefficient between the high voltage coil 3 made of copper or aluminum and the synthetic resin 4, peeling may occur between the high voltage coil 3 and the synthetic resin 4. This peeling area has a low discharge voltage because it is under reduced pressure, and if a higher voltage is applied, a partial discharge will occur, leading to insulation deterioration and eventually dielectric breakdown, so it is necessary to prevent peeling from occurring. be.
Therefore, conventionally, the outer periphery of the high-voltage coil 3 is made of insulating paper, glass, nonwoven fabric, etc., which has good adhesion to the synthetic resin 4.
An insulating material 7 such as tape was wound to improve the adhesion between the high voltage coil 3 and the synthetic resin 4. However, when the capacity of this type of three-phase voltage transformer increases and the required insulation distance between the two internal high-voltage coils 3 and 3 increases, the stress caused by curing shrinkage of the synthetic resin 4 is greater than the insulation. The adhesive strength was greater than that of the material 7, and peeling occurred between the high voltage coil 3 and the synthetic resin 4.
本考案は、上記のような欠点を除去し、合成樹
脂の硬化収縮力が大きくなつても高圧コイルと合
成樹脂との間に剥離を生じさせず、絶縁信頼性の
高いモールド形計器用変圧器を提供することを目
的とするものである。
The present invention eliminates the above-mentioned drawbacks and provides a molded instrument transformer with high insulation reliability, which does not cause peeling between the high voltage coil and the synthetic resin even when the curing shrinkage force of the synthetic resin increases. The purpose is to provide the following.
本考案は、コイルとコイルの間の合成樹脂中
に、合成樹脂に対して接着性の悪いフイルム質材
およびこのフイルム質材を包囲し、合成樹脂に対
して接着性の良い静電シールドを有する剥離層を
設けたもので、合成樹脂の硬化収縮力による剥離
を、電界が分布しない静電シールド中のフイルム
基材との間で生じるようしたものである。
The present invention has a film material with poor adhesion to synthetic resin in the synthetic resin between the coils, and an electrostatic shield that surrounds this film material and has good adhesion to synthetic resin. A peeling layer is provided so that peeling due to the curing shrinkage force of the synthetic resin occurs between the film base material in the electrostatic shield and the electric field is not distributed.
以下、本考案の一実施例を図面を参照して説明
する。
An embodiment of the present invention will be described below with reference to the drawings.
第２図は、本考案の一実施例の断面図である。 FIG. 2 is a sectional view of one embodiment of the present invention.
第３図は、第２図における静電シールド８の拡
大断面図である。２個の変成器中身は従来と同様
にそれぞれ鉄心１の外周に低圧コイル２を巻回
し、その外周に低圧コイル２と所定の絶縁間隔を
介して、高圧コイル３を巻回して構成されてお
り、並べて合成樹脂４により一体にモールドされ
ている。また低圧コイル２は、合成樹脂４の側面
に露出した低圧端子５に接続され、高圧コイル３
は、合成樹脂４の上面に露出した高圧端子６に接
続されている。そして、高圧コイル３，３間の合
成樹脂４中の中央部には、高圧コイル３の高さお
よび幅よりも大きい剥離層８がコイル３，３間を
しやへいするように垂直に設けられている。この
剥離層８は鉄心１あるいは、ベース９に接続線１
０を介して接続され接地電位となつている。この
剥離層８は合成樹脂４に対して接着性の悪い複数
枚のフイルム基材８ａと、これらのフイルム基材
８ａを包囲するように設けられ、合成樹脂４に対
して接着性の良好な静電シールド８ｂとからなつ
ている。静電シールド８ｂは、たとえば細線を網
状に編んだ可撓性の金網が望ましく、またフイル
ム質材８ａは、たとえばポリエチレンテレフタレ
ートフイルム、ポリプロピレンフイルム等を用い
る。この種のフイルム質材８ａは、表面が平滑で
あるため、合成樹脂４に対する接着特性が悪い。
このため、合成樹脂４のモールド時の硬化収縮や
冷熱シヨツク時のストレスは第２図に示す矢印Ｂ
方向に作用する。この場合、合成樹脂４と高圧コ
イル３との接着特性がフイルム質材８ａと、合成
樹脂４との接着特性よりも良好であるため、上記
のストレスは接着特性の悪い合成樹脂４とフイル
ム質材８ａとの間に集中して作用して剥離を生じ
させ、合成樹脂４と高圧コイル３との間には剥離
を生じさせない。しかもこの剥離が生じる部分
は、フイルム質材８ａの表面であつて、接地電位
にある静電シールド８ｂの内部に位置する。従つ
てこの剥離部分では電界が分布しないので、減圧
下であつても部分放電を発生することはない。こ
れにより、高圧コイル３，３間の合成樹脂４の絶
縁層で部分放電を生じることがなくなり、絶縁劣
化あるいは絶縁破壊がなくなつて絶縁信頼性を高
めることができる。 FIG. 3 is an enlarged sectional view of the electrostatic shield 8 in FIG. 2. As in the past, the contents of the two transformers each consist of a low voltage coil 2 wound around the outer periphery of an iron core 1, and a high voltage coil 3 wound around the outer periphery of the low voltage coil 2 with a predetermined insulating interval between them. , are lined up and integrally molded with synthetic resin 4. Further, the low voltage coil 2 is connected to a low voltage terminal 5 exposed on the side surface of the synthetic resin 4, and the high voltage coil 3
is connected to a high voltage terminal 6 exposed on the upper surface of the synthetic resin 4. A peeling layer 8 larger than the height and width of the high-voltage coil 3 is vertically provided in the center of the synthetic resin 4 between the high-voltage coils 3 and 3 so as to soften the gap between the coils 3 and 3. ing. This peeling layer 8 is attached to the iron core 1 or the base 9 with the connecting wire 1.
0 and is at ground potential. This peeling layer 8 is provided with a plurality of film base materials 8a that have poor adhesion to the synthetic resin 4, and is provided so as to surround these film base materials 8a. It consists of an electric shield 8b. The electrostatic shield 8b is preferably a flexible wire mesh made of thin wires knitted into a net shape, and the film material 8a is made of, for example, polyethylene terephthalate film, polypropylene film, or the like. This type of film material 8a has a smooth surface and therefore has poor adhesion properties to the synthetic resin 4.
For this reason, curing shrinkage during molding of the synthetic resin 4 and stress during cold shock are reduced by the arrow B shown in Figure 2.
Acts on the direction. In this case, since the adhesive properties between the synthetic resin 4 and the high-voltage coil 3 are better than those between the film material 8a and the synthetic resin 4, the above stress is caused by the bond between the synthetic resin 4 and the film material, which have poor adhesive properties. The synthetic resin 4 and the high-voltage coil 3 are not separated from each other by acting intensively between the synthetic resin 4 and the high-voltage coil 3 to cause separation. Moreover, the portion where this peeling occurs is located on the surface of the film material 8a and inside the electrostatic shield 8b which is at ground potential. Therefore, since the electric field is not distributed in this peeled portion, no partial discharge occurs even under reduced pressure. This prevents partial discharge from occurring in the insulating layer of synthetic resin 4 between the high-voltage coils 3, 3, eliminates insulation deterioration or breakdown, and improves insulation reliability.
なお、上記実施例においては変成器中身が２個
の場合について説明したが３個以上に同様に実施
できる。また１個の鉄心の複数脚にそれぞれ高低
圧コイルが巻装されている場合にも実施できる。
この場合には剥離層８は鉄心窓内に位置すること
になる。 In the above embodiment, the case where there are two transformers is described, but it can be similarly implemented with three or more transformers. It can also be implemented when high and low voltage coils are wound around multiple legs of one iron core.
In this case, the release layer 8 will be located within the core window.
以上詳述したように本考案によるモールド形計
器用変圧器は、２個以上のコイルを並べて合成樹
脂によりモールドする場合に、コイル間の合成樹
脂中に、フイルム質材とこのフイルム質材を覆う
静電シールドとからなる剥離層を埋設したので、
合成樹脂のモールド時の硬化収縮や冷熱シヨツク
時のストレスによる剥離が電気的に問題のない剥
離層内で生じるようになり、コイル間の絶縁信頼
性を高めることができる。
As detailed above, in the molded voltage transformer according to the present invention, when two or more coils are arranged side by side and molded with synthetic resin, the film material is covered in the synthetic resin between the coils. Because we embedded a release layer consisting of an electrostatic shield,
Peeling due to curing shrinkage during molding of the synthetic resin or stress during cold/hot shock occurs within the peeling layer, which poses no electrical problems, and the insulation reliability between the coils can be improved.
第１図は従来のモールド形計器用変圧器の断面
図、第２図は本考案による一実施例によるモール
ド形計器用変圧器の断面図、第３図は第２図にお
ける静電シールドの拡大断面図である。
１……鉄心、２……低圧コイル、３……高圧コ
イル、４……合成樹脂、５……低圧端子、６……
高圧端子、７……絶縁物、８……剥離層、８ａ…
…フイルム質材、８ｂ……静電シールド。
Figure 1 is a sectional view of a conventional molded potential transformer, Figure 2 is a sectional view of a molded potential transformer according to an embodiment of the present invention, and Figure 3 is an enlarged view of the electrostatic shield in Figure 2. FIG. 1...Iron core, 2...Low voltage coil, 3...High voltage coil, 4...Synthetic resin, 5...Low voltage terminal, 6...
High voltage terminal, 7... Insulator, 8... Peeling layer, 8a...
...Film material, 8b...Electrostatic shield.
Claims (1)
ールドしたモールド形計器用変圧器において、コ
イル間の合成樹脂中に、合成樹脂に対して接着性
の悪いフイルム質材と、このフイルム質材を包囲
し合成樹脂に対して性着性の良い静電シールドと
を有する剥離層を介在させたことを特徴とするモ
ールド形計器用変圧器。 In a molded instrument transformer in which two or more coils are arranged side by side and molded with synthetic resin, a film material with poor adhesion to the synthetic resin is contained in the synthetic resin between the coils, and this film material is surrounded. A molded instrument transformer characterized by interposing a release layer having an electrostatic shield with good adhesion to a synthetic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5267384U JPS60166129U (en) | 1984-04-12 | 1984-04-12 | Molded instrument transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5267384U JPS60166129U (en) | 1984-04-12 | 1984-04-12 | Molded instrument transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60166129U JPS60166129U (en) | 1985-11-05 |
| JPH0220810Y2 true JPH0220810Y2 (en) | 1990-06-06 |
Family
ID=30572835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5267384U Granted JPS60166129U (en) | 1984-04-12 | 1984-04-12 | Molded instrument transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60166129U (en) |
-
1984
- 1984-04-12 JP JP5267384U patent/JPS60166129U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60166129U (en) | 1985-11-05 |
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