JPH0215302Y2 - - Google Patents
Info
- Publication number
- JPH0215302Y2 JPH0215302Y2 JP1983063221U JP6322183U JPH0215302Y2 JP H0215302 Y2 JPH0215302 Y2 JP H0215302Y2 JP 1983063221 U JP1983063221 U JP 1983063221U JP 6322183 U JP6322183 U JP 6322183U JP H0215302 Y2 JPH0215302 Y2 JP H0215302Y2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- presser
- holder
- electric field
- dry type
- 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
- 239000011810 insulating material Substances 0.000 claims 1
- 230000005684 electric field Effects 0.000 description 10
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
Landscapes
- Coils Of Transformers For General Uses (AREA)
Description
【考案の詳細な説明】
本考案は、乾式変圧器、特に、その変圧器コイ
ルの支持材として設置されるコイル押えを有する
乾式変圧器に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dry type transformer, and particularly to a dry type transformer having a coil retainer installed as a support for the transformer coil.
従来、この種の変圧器の一例としては、添付図
面第１図に示すようなものがあつた。図におい
て、符号１は鉄心、２は高圧コイル、３は低圧コ
イル、４は鉄心１を締め付けている端枠、５は端
枠４に取り付けられた押え金具、６は高圧及び低
圧コイル２，３と押え金具５との間に挿入される
コイル押えである。 Conventionally, an example of this type of transformer is shown in FIG. 1 of the accompanying drawings. In the figure, 1 is the iron core, 2 is a high-voltage coil, 3 is a low-voltage coil, 4 is an end frame that tightens the iron core 1, 5 is a presser fitting attached to the end frame 4, and 6 is a high-voltage and low-voltage coil 2, 3. This is a coil presser inserted between the coil presser and the presser metal fitting 5.
このような第１図に示す変圧器は、主絶縁をコ
イル押え６によつてまかなつている。すなわち、
高圧コイル２に試験電圧が印加されたとき、対接
地極（ここでは、押え金具５が接地極である）間
の絶縁は、コイル押え６の距離Ｌによつて保持さ
れる。このときの等電位線図を示すと添付図面第
２図のとおりである。図中、E1はコイル押え６
に面した位置における押え金具５の電界であり、
E2は空気に面した位置における押え金具５の電
界である。そしてこのときの電界は、空気の破壊
電界（3kV／mm）以下に抑えられなければならな
い。 In the transformer shown in FIG. 1, the main insulation is provided by the coil retainer 6. That is,
When a test voltage is applied to the high voltage coil 2, insulation between the electrodes to the ground (here, the holding metal fitting 5 is the grounding electrode) is maintained by the distance L of the coil holding member 6. The equipotential diagram at this time is shown in FIG. 2 of the attached drawings. In the figure, E 1 is the coil presser 6
is the electric field of the presser metal fitting 5 at a position facing the
E 2 is the electric field of the presser metal fitting 5 at the position facing the air. The electric field at this time must be kept below the destructive electric field of air (3kV/mm).
従来の乾式変圧器は、以上のように構成されて
いるので、コイル押え６の距離Ｌを、押え金具５
に生ず電界に対応して、大きくとる必要があり、
その結果、変圧器寸法や重量が増大し、従つて、
コストアツプする等の欠点があつた。 Since the conventional dry type transformer is configured as described above, the distance L of the coil holder 6 is determined by the distance L of the coil holder 6.
It is necessary to make it large to accommodate the electric field generated in
As a result, transformer size and weight increase, and therefore
There were drawbacks such as increased costs.
本考案は、上記のような従来のものにおける欠
点を除去し、コイル押えの距離Ｌを短くして、コ
ンパクトで安価な乾式変圧器を提供することを目
的とするものである。 The object of the present invention is to eliminate the above-mentioned drawbacks of the conventional transformer, shorten the coil holding distance L, and provide a compact and inexpensive dry type transformer.
本考案は、この目的を達成するために、コイル
押え６中に、コイル側及び空気露出側をコイル押
えから露出しないように、電極を埋め込むことを
特徴とするものである。 In order to achieve this object, the present invention is characterized in that electrodes are embedded in the coil holder 6 so that the coil side and the air-exposed side are not exposed from the coil holder.
以下、本考案をその一実施例を示す添付図面第
３図に基づいて説明する。 Hereinafter, the present invention will be explained based on FIG. 3 of the accompanying drawings showing one embodiment thereof.
図において、符号１１はコイル押え１２に埋め
込まれた電極であつて、そのコイル２，３側及び
空気露出側はコイル押え１２に被覆されるように
埋め込まれている。 In the figure, reference numeral 11 is an electrode embedded in the coil holder 12, and the coil holder 12 covers the coil 2 and 3 sides and the air exposed side.
本考案の乾式変圧器、特に、そのコイル押え１
２は、このように構成されているので、コイル押
え１２に面する位置における押え金具５の電界
E1′は従来のものに比べ大きくなり、逆に空気に
面する位置における押え金具５の電界E2′は従来
のものに比べ小さくなる。 The dry type transformer of the present invention, especially its coil holder 1
2 is configured in this way, so that the electric field of the presser metal fitting 5 at the position facing the coil presser 12 is reduced.
E 1 ' is larger than that of the conventional one, and conversely, the electric field E 2 ' of the presser metal fitting 5 at the position facing the air is smaller than that of the conventional one.
しかしながら、コイル押え１２は通常エポキシ
樹脂により構成されているので、その耐電圧は
100kV／mm程度と高く、従つて、コイル押え１２
側の電界E1′が高くなつても、100kV／mm程度以
下ならば破壊することはない。 However, since the coil holder 12 is usually made of epoxy resin, its withstand voltage is
It is high at about 100kV/mm, so the coil presser 12
Even if the electric field E 1 ' on the side becomes high, it will not be destroyed if it is less than about 100 kV/mm.
一方、空気に面した側の押え金具１２の電界
E2′は小さくなることから、耐電圧は上昇する。 On the other hand, the electric field of the presser metal fitting 12 on the side facing the air
Since E 2 ′ becomes smaller, the withstand voltage increases.
従つて、コイル押え１２の距離Ｌは、従来のも
のに対して縮少させ得ることが可能となる。 Therefore, the distance L of the coil presser 12 can be reduced compared to the conventional one.
以上のように、本考案によればコイル押え中に
電極を埋め込んだことにより、特に、押え金具の
空気に面した側の電界を小さくすることができ、
その結果、コイル押えの距離Ｌを縮少でき、従つ
て、コンパクトで安価な乾式変圧器が得られる効
果を奏することができる。 As described above, according to the present invention, by embedding the electrode in the coil holder, the electric field can be particularly reduced on the side of the holder facing the air.
As a result, the distance L of the coil presser can be reduced, and therefore, a compact and inexpensive dry type transformer can be obtained.
第１図は従来の乾式変圧器の要部断面図、第２
図は第１図のＡ部詳細断面図、第３図は本考案の
一実施例の第１図のＡ部に相当する部分の詳細断
面図である。
図中、１……鉄心、２……高圧コイル、３……
低圧コイル、４……端枠、５……押え金具、６，
１２……コイル押え、１１……電極。なお、各図
中、同一符号は同一または相当部分を示す。
Figure 1 is a sectional view of the main parts of a conventional dry transformer, Figure 2
The figure is a detailed sectional view of section A in FIG. 1, and FIG. 3 is a detailed sectional view of a section corresponding to section A in FIG. 1 of an embodiment of the present invention. In the figure, 1... iron core, 2... high voltage coil, 3...
Low voltage coil, 4... End frame, 5... Holder fitting, 6,
12... Coil holder, 11... Electrode. In each figure, the same reference numerals indicate the same or corresponding parts.
Claims (1)
端部を押え金具で支持する構造を有する乾式変圧
器において、一側面を上記押え金具に密着させ、
コイル側及び空気露出側が上記コイル押えから露
出しないように、上記コイル押え中に電極を埋め
込んだことを特徴とする乾式変圧器。 In a dry type transformer having a structure in which a coil end is supported by a holding fitting through a coil holding member made of an insulating material, one side is brought into close contact with the holding fitting,
A dry type transformer characterized in that electrodes are embedded in the coil holder so that the coil side and the air exposed side are not exposed from the coil holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6322183U JPS59166429U (en) | 1983-04-25 | 1983-04-25 | dry type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6322183U JPS59166429U (en) | 1983-04-25 | 1983-04-25 | dry type transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59166429U JPS59166429U (en) | 1984-11-08 |
| JPH0215302Y2 true JPH0215302Y2 (en) | 1990-04-25 |
Family
ID=30193412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6322183U Granted JPS59166429U (en) | 1983-04-25 | 1983-04-25 | dry type transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59166429U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5729120B2 (en) * | 1977-05-31 | 1982-06-21 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6022591Y2 (en) * | 1980-07-28 | 1985-07-05 | 株式会社東芝 | Winding support device for induction electric equipment |
-
1983
- 1983-04-25 JP JP6322183U patent/JPS59166429U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5729120B2 (en) * | 1977-05-31 | 1982-06-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59166429U (en) | 1984-11-08 |
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