JPS5887804A - Transformer - Google Patents

Abstract

PURPOSE:To improve insulation stability and reliability and to make a unit transformer compact and lightweight when a plurality of them are connected in parallel by a method wherein, as to an electric field releasing shield provided for the winding of the unit transformer with a lead passed through its iron core window, the lead is passed through the iron core window by utilizing at least part of the conductor forming part of the electric field releasing shield at roughly the same potential as that of the lead. CONSTITUTION:An electric field releasing shield 22f electrically connected to a winding strand and a lead 21d on the high tension side are roughly at the same potential and, by arranging semicircular plate conductors 22f1, 22f2 opposite to each other, a disc conductor is formed, the semicircular plate conductors being not allowed to communicates with each other. The periphery of the disc conductor is coated with an insulating material 22f3, whereas lead apertures 22f4, 22f5 are provided at both ends of one plate conductor 22f1. Accordingly, if the lead 21d on the high tension side is connected to the lead apertures 22f4, 22f5, the partial conductor 22f1 of this shield 22f will form part of the current flow passage of the lead 21d on the high tension side. In addition, since the conductor 22f1 is so arranged that it passes through the iron core window, the current flow passage of the lead 21d on the high tension side is allowed to pass through the iron core window of an iron core 22a.

Description

【発明の詳細な説明】 本発明は単相変圧器などの単位変圧器金被数台並列接続
して使用する変圧器に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transformer, such as a single-phase transformer, in which several unit transformers are connected in parallel.

近年変圧器などの静止誘導電器においては、高電圧・大
容赦化の傾向を示し、１ト容積も当然増加傾向ｖ′ｃあ
る。そこで鉄道輸送制限、道路輸送制限から従来より３
相変圧器全単相３台に分割し、さらにその単相変圧器全
２分割、３分割して輸送し、分割された単位変圧器を現
地で並列接続し７て単相変圧器全形成する方式がとられ
る。In recent years, stationary induction electric appliances such as transformers have shown a trend toward higher voltages and larger tolerances, and the capacity of one ton has also naturally increased. Therefore, due to railway transport restrictions and road transport restrictions, three
The phase transformer is divided into 3 single-phase units, and then the single-phase transformer is divided into 2 and 3 units and transported, and the divided unit transformers are connected in parallel on site to form the complete single-phase transformer. A method is adopted.

これらの単位変圧器の接続方式と（−７で、第１の単位
変圧器の巻線から引出されたリードを他の単位変圧器の
鉄心窓内を通過さぎて、他の単位変圧器の巻線から引出
されたリードと並列接続する構造が先に提案されている
。The connection method of these unit transformers (-7) is to pass the lead drawn out from the winding of the first unit transformer through the iron core window of the other unit transformer, and connect the lead of the other unit transformer. A structure has previously been proposed in which the lead is connected in parallel with the lead drawn out from the winding.

この場合の単位変圧器のリード接続構造を第１図乃至第
３図により説明する。犀、１図（１単相単位変圧器２台
を並列接続して単相容−Ｎｈ　ｉ電器の２倍とする場合
の巻線リード接続構造を示す。単位変圧器の巻線リード
が鉄心窓内全通、ｄりするに当って絶縁上問題となるの
は外側巻線の高圧側リードでありこれによって鉄心窓寸
法が決まり、内側巻線は比較的電圧が低く、特に大きな
Ｍ！２縁距離を必要としないことから内側巻線リードの
図示全省略し外側巻線のリードのみ全図示してらる。第
２図及び第３図は第１図Ｋ　＄”ける学位変圧；４Ｆ；
　（Ｉ　ｌ）の異なる実施例を・示す断面図である。The lead connection structure of the unit transformer in this case will be explained with reference to FIGS. 1 to 3. Figure 1 (1) Shows the winding lead connection structure when two single-phase unit transformers are connected in parallel to achieve double the single-phase capacity -Nh i appliance.The winding lead of the unit transformer is connected to the iron core window. The problem in terms of insulation when wiring the inner winding is the high voltage side lead of the outer winding, which determines the core window dimensions, and the inner winding has a relatively low voltage, especially the large M!2 edge. Since the distance is not required, the illustration of the inner winding lead is completely omitted and only the outer winding lead is shown in its entirety. Figures 2 and 3 are the same as those shown in Figure 1.
FIG. 3 is a cross-sectional view showing different embodiments of (I l).

２台の単位変圧器（１０）、　、　（１１）はそｆ’１
．それ、次心（１０ａ）（１１ａ）に巻線（１０ｂ）ｌ
（Ｉｌｌ））　２３１ｔりし；ケ変圧器中身全タンク（
１０ｃ）、（ｌｌｃ）内に収納１−て構成さＩＬる。。Two unit transformers (10), , (11) are f'1
．． That is, the winding (10b) l on the next center (10a) (11a)
(Ill)) 231 tons; ke All tanks inside the transformer (
10c), (llc). .

単位変圧器００）の巻線（１０ｂ）から引出された外側
巻線の二次側の高圧側リード（１０ｄ）、低圧側リード
（１０ｅ）Ｕ、それぞれリードダクトＯ’）　ｒ　（Ｉ
ｌｌ）’ｆｒ：　、’ｕ％つだ後、単位変圧器０１）の
鉄心（ｌｌａ）の別個の鉄心窓内金通過し、単位変圧器
θ１）のタンク（ｌｉｅ）の側面に配設したブツ／ング
ポケソ）　（ｕ；ａ）、（１７ａ）のブッシング（１６
ｂ）、（１７ｂ）　（ｌζそ・！ｔぞれｌλ続′さト］
、る。一方学位変圧器（１１）の巻線（ｌｌｂ）から引
出さＩｔだ高圧側リード（ｌｌｄ）、低圧側リード（１
１（・）もそれぞれブッシング（１６ｈ）、（１７ｂ）
に接ＡＲＭさ；？’ｌる。中位変圧器（１０）の巻線（
１０１））から引出σれた１１も圧（１１ｊリード（１
０ｄ）、低圧側リード（ｌｉｅ）が単１ヶ変圧器（！１
）の鉄心窓内を通過する際には第２図ＶＣ示すようにそ
の鉄心（ｌｌａ）に巻装された巻線（ｕｂ）の同電位部
分の近傍（高圧側が上部、低圧側か下部）に配置される
。巻線が上下振り分けで巻装された場合は第３図に示す
ように高圧側リード（１０ｄ）が巻線中央部の近傍に配
置される。The high voltage side lead (10d) and the low voltage side lead (10e) U of the secondary side of the outer winding drawn out from the winding (10b) of the unit transformer 00), respectively lead duct O') r (I
ll)'fr: ,'u% After passing through the separate iron core window inner metal of the iron core (lla) of the unit transformer 01), the pieces arranged on the side of the tank (lie) of the unit transformer θ1) Bushing (16) (u;a), (17a)
b), (17b)
,ru. On the other hand, the high voltage side lead (lld) and the low voltage side lead (1
1(・) are also bushings (16h) and (17b), respectively.
Is it connected to ARM? 'll. The winding of the medium transformer (10) (
11, which was pulled out from σ (101)), also has pressure (11j lead (1
0d), the low voltage side lead (lie) is connected to a single transformer (!1
), as shown in Figure 2 VC, near the same potential part of the winding (ub) wound around the core (lla) (high voltage side at the top, low voltage side at the bottom). Placed. When the winding is wound vertically, the high voltage side lead (10d) is arranged near the center of the winding, as shown in FIG.

ところで、このような構成においては、特に電圧の高い
高圧側リード（１０ｄ）　？鉄心窓内金通過させたこと
によって篩圧側リード（１０ｄ　）を収納するための長
く、大きなリードダクトが不要となり、絶縁の安定性及
び信頼性が向上するとともに油量、重量が低減されると
いう効果かある。しかしながら、一方の単位変圧器０１
）の鉄心窓寸法の大きさが高圧側リード（ｌ　Ｏｄ　）
と鉄心側脚間のＰ縁距離によって決まるのに対し、単位
変圧器（１０）の鉄心窓寸法の太ききは高圧側リード（
１０ｄ）がないので、巻線（１０ｂ）の外側巻線と鉄心
側脚間の絶縁距離によって決まり、単位変圧器０１）の
鉄心窓寸法より小さくて良い。従って鉄心窓寸法の異な
る２種類の鉄心を製作することになるので不経済である
。また同一の鉄心窓寸法で１種類の鉄心全２金製作する
場合は、鉄心窓寸法の大きい方１／Ｃ合せることＫなる
ためこれ１だ不経済である。By the way, in such a configuration, the high-voltage side lead (10d) with particularly high voltage? By passing the iron core through the metal inside the window, there is no longer a need for a long and large lead duct to house the sieve pressure side lead (10d), which improves the stability and reliability of insulation and reduces the amount of oil and weight. There is. However, one unit transformer 01
) is the core window size of the high voltage side lead (l Od )
The width of the core window of the unit transformer (10) is determined by the P edge distance between the lead and the core side leg (
10d), it is determined by the insulation distance between the outer winding of the winding (10b) and the core side leg, and may be smaller than the core window dimension of the unit transformer 01). Therefore, two types of cores with different core window dimensions have to be manufactured, which is uneconomical. Furthermore, if one type of core is made of two metals with the same core window dimensions, it would be uneconomical to match the larger core window dimension by 1/C.

本発明は上記欠点全除去するためになされたもので、複
数台の単位変圧器を並列法統する場合、絶縁の安定性及
び信頼性を向上するとともに、小形、軽量化して経済的
に構成できる変圧器を提供することを目的とする。The present invention has been made to eliminate all of the above-mentioned drawbacks, and when a plurality of unit transformers are connected in parallel, it improves the stability and reliability of insulation, and at the same time provides a transformer that can be constructed economically by being smaller and lighter. The purpose is to provide equipment.

かかる目的を達成するため、本発明は鉄心窓内にリード
を通過させる単位変圧器の巻線Ｖ′Ｃ設けられる電界緩
和用シーＩレドのうち、上記リードとほぼ同゛喧位の電
界緩和用／−ルドの一部を構成する導体の少なくとも一
部を利用して鉄心窓内金通過路せたものである。In order to achieve such an object, the present invention provides an electric field relieving shield of approximately the same magnitude as the above-mentioned lead among the electric field relieving leads provided in the winding V'C of the unit transformer through which the leads pass through the iron core window. /- At least a part of the conductor constituting a part of the lead is used to form a passage through the metal inside the iron core window.

以下本発明の一実施例を図百１をか照して説明する。第
４図は本発明による変圧器金示す平面図で、３台の単位
変圧器０υ、（２２１，（２ｏｒ並列接続する場合の実
施例である。図において、各単位変圧器Ｃυ。An embodiment of the present invention will be described below with reference to FIG. FIG. 4 is a plan view showing the transformer according to the present invention, and is an embodiment in which three unit transformers 0υ, (221, (2or) are connected in parallel. In the figure, each unit transformer Cυ.

（イ）９図）はそれぞれ単相３脚鉄心（２１ａ　）　＋
　（２２ａ　）　、（２３ａ）の１個の主脚に、内側か
ら三次巻線、内側（−次側）巻線、外側（二次側）巻線
の順に配置された巻線全巻線（２１ｂ）、（２２ｂ）、
（２３ｂ）全巻装して絶縁油とともにタンク（２１ｃ）
、（２２ｃ）、（２３ｃ）内に収納して構成される。ま
た各単位変圧器Ｃ２１Ｊ　、　（２２）　、　（２３）
は並置されてリードダク）（２４）、（２５）を介して
連結され、一方の側に位置する単位変圧器（２３）　ｖ
ｃ、は他の単位変圧器（２４と対向しない側にブッ７ン
グポケッ）　（２６ａ）。(A) Fig. 9) is a single-phase three-leg iron core (21a) +
All the windings (21b) are arranged on one main landing gear of (22a) and (23a) in the order of tertiary winding, inner (-next side) winding, and outer (secondary side) winding from the inside. , (22b),
(23b) Fully wrapped and tank with insulating oil (21c)
, (22c), and (23c). Also, each unit transformer C21J, (22), (23)
are juxtaposed and connected via lead ducts (24) and (25), and a unit transformer (23) located on one side.
c, is another unit transformer (with a pocket on the side not facing 24) (26a).

（２７ａ）及びブッシング（２６ｂ）、（２７ｂ）が設
けられている。(27a) and bushings (26b) and (27b) are provided.

単位変圧器Ｃ２＋）の巻線（２１ｂ）の外側巻線から引
出された二次側の高、低圧側リード（２１ｄ）、（２１
ｅ）は他の単位変圧器（２２１、ｉ；シｌの鉄心（２２
ａ　）　、　（２３ａ　）の側脚の内側にある異なる鉄
心窓内全通過してブッシング（２６ｂ）、（２７ｂ）に
それぞれ接続され、同様に単位変圧器（社）の巻線（２
２ｂ）の外側巻線から引出された二次側の高低圧側リー
ド（２２ｄ）、（２２ｅ）も単位変圧器Ｃ□□□の鉄心
（２３ａ）の異なる鉄心窓内金通過してブッシング（２
６ｂ）　、　（２７ｂ）に接続される。−また単位変圧
器Ｃ段の巻線（２３ｂ）から引出された二次側の高、低
圧側リード（２３ｄ　）　、　（２３ｅ　）もブッシン
グ（２６ｂ）。Secondary high and low voltage side leads (21d), (21
e) is another unit transformer (221, i;
a) and (23a), and are connected to the bushings (26b) and (27b), respectively, and are similarly connected to the winding (2) of the unit transformer.
The high and low voltage side leads (22d) and (22e) on the secondary side pulled out from the outer winding of unit transformer C□□□ also pass through different iron core window inner metals of the iron core (23a) of unit transformer C□□□ and are connected to the bushing (2b).
6b) and (27b). - Also, the secondary high and low voltage side leads (23d) and (23e) drawn out from the winding (23b) of the unit transformer C stage are also bushings (26b).

（２７ｂ）　Ｋ接続されて、３台の単位変圧器（２υ、
（社）。(27b) K-connected, three unit transformers (2υ,
(company).

（ハ）が並列接続される。(c) are connected in parallel.

ここで、高、低圧側リード（２１ｄ　）　、　（２１ｅ
　）が鉄心窓内を通過する、例えば単位変圧器（２功は
第５図に示すように、鉄心（２２ａ）ＶＣ巻装された巻
線（２２ｂｌ）（２２ｂ２）　、（２２ｂＢ）の、特に
外側（高ｊＥ　）巻線（２２ｂ３）において、１界を緩
オロするために設けられた／−ルドのうち、高圧側リー
ド（２１ａ）とほぼ′学位の等しい部分に設けられるシ
ールド（２２ｆ）に、このシールド（２２ｆ）の一部分
構成する導体（２２ｆ＋）が鉄心窓内金通過するようＶ
Ｃ配設されており、この導体（２２ｆｌ）が高圧側リー
ド（２１（１）と接続されることによって高圧側リード
（２１ｄ　）の通電路の一部を構成するようになってい
る。すなわち、上下振分けで巻回された外側巻線（２２
ｂｓ）においては、高さ方向中央部が最゛喧圧の部分で
あり、この部分の巻線素線と′電気的に接続された電界
緩和用の７−ルド（２２ｆ）は高圧側リード（２１ｄ）
とほぼ同゛イ位にある。Here, the high and low voltage side leads (21d), (21e
) passes through the core window, for example, in a unit transformer (as shown in FIG. (High jE) In the winding (22b3), the shield (22f) is provided at a part of the lead (22f) which is provided at approximately the same degree as the high voltage side lead (21a) among the /- leads provided for relaxing the first field. V so that the conductor (22f+) that constitutes a part of this shield (22f) passes through the inner metal of the iron core window.
This conductor (22fl) is connected to the high voltage side lead (21(1)) to form a part of the current conduction path of the high voltage side lead (21d). That is, Outer winding (22
bs), the central part in the height direction is the part with the highest pressure, and the 7-lead (22f) for electric field relaxation, which is electrically connected to the winding wire in this part, is connected to the high-voltage side lead (22f). 21d)
It is almost at the same level.

このシールド（２２ｆ）は第６図及び第７図に示すよう
に、半円状の板状導体（２２ｆ　Ｉ）、（２２ｆｚ）を
対向配置させて１ターンを形成しない円板状の導体全形
成し、この円板状の導体の周囲に絶縁物（２２ｆｓ）を
被覆するとともに一方の板状導体（ｚ２ｆ＋）の両端に
口出し部（２２ｆ４）　、（２２ｆ５）を設けて構成（
〜である。As shown in Figures 6 and 7, this shield (22f) is a disk-shaped conductor entirely formed by disposing semicircular plate-shaped conductors (22f I) and (22fz) facing each other to form one turn. The disc-shaped conductor is coated with an insulator (22fs) around the conductor, and openings (22f4) and (22f5) are provided at both ends of one of the plate-shaped conductors (z2f+).
It is ~.

従って口出し都（２２ｆ４）、（２２ｆ５）に高圧側リ
ード（２ｔｄ）全接続すれば、このシールド（２２ｆ　
）の一部の導体（２２ｆｌ）が高圧側リード（２１ｄ）
の通電路の一部を構成することＶＣなり、しかも導体（
２２ｆ　１　）が鉄心窓を通過する状態に配設されてい
るので、高圧側リード（２１（１）の通電路が鉄心（２
２ａ）の鉄心窓を通過することになる。なお、他方の導
体（２２ｆ２）は引出線（２２ｆ６）によって外側巻線
（２２ｂ　ａ　）の最高電圧のセク／ヨンの素線に電気
的に接続されている。Therefore, if all the high voltage side leads (2td) are connected to the output terminals (22f4) and (22f5), this shield (22f
) part of the conductor (22fl) is the high voltage side lead (21d)
It is VC that forms part of the current-carrying path of
22f 1 ) is arranged to pass through the iron core window, so that the energizing path of the high voltage side lead (21(1)) passes through the iron core (2
It will pass through the iron core window of 2a). The other conductor (22f2) is electrically connected to the strand of the highest voltage section of the outer winding (22ba) by a lead wire (22f6).

従ってこのようにすれは、特Ｖ（電圧の高い高圧側リー
ド（２ｔｄ）が外側巻線（２２ｂ３）の外周面よりも内
側に配置されることになる。このため、高圧側リード（
２１ｄ）が鉄心（２Ｚａ）の鉄心窓内を通過しても、鉄
心窓寸法は側脚と外側巻線（２２ｂりとの間に絶縁距離
で決まるので広げる必要がない。従って鉄心（２２ａ）
はもと、より単位変圧器（２り全体の大きさを、高圧側
リードが鉄心窓内金通過しない単位変圧器（２１）と同
じ大きさに構成でき、しかもその太きさも最小とするこ
とができるので、各単位変圧器ｅυ、　（２３）　、　
（２３１の鉄心重量、油１身等が低減され、小形＠量と
なる。また高圧側リード金支持する支え等が不要となる
ばかりか、高圧側リード全収納するための長く、大きな
リードダクトが不要となること及び高圧側リード（２１
ｄ）　′ｔ−はぼ同電位にあるシールド（２２ｆ　）の
一部の導体（２２ｆ＋）１利用して鉄心窓内金通過させ
たことによって、高砥圧リード（２１ｄ）の絶縁の安定
性、信頼性が向上するとともに油量等を更に低減するこ
とができる。Therefore, the high voltage side lead (2td) with high voltage is placed inside the outer peripheral surface of the outer winding (22b3).
21d) passes through the core window of the core (2Za), the core window size is determined by the insulation distance between the side leg and the outer winding (22b), so there is no need to widen it. Therefore, the core (22a)
Originally, the overall size of the unit transformer (21) could be the same as that of the unit transformer (21) in which the high-voltage side lead does not pass through the iron core window inner metal, and its thickness could also be minimized. Therefore, each unit transformer eυ, (23) ,
(231's iron core weight, oil, etc. are reduced, resulting in a smaller @ quantity.In addition, not only is there no need for supports to support the high-pressure side lead metal, but a long and large lead duct is required to accommodate all the high-pressure side leads. No longer needed and high voltage side lead (21
d) By using part of the conductor (22f+) 1 of the shield (22f), which is at approximately the same potential as 't-, to pass through the inner metal of the iron core window, the insulation stability of the high abrasive pressure lead (21d) is improved. Reliability is improved and the amount of oil, etc. can be further reduced.

なお、上記実施例においては、シールド（２２ｆ）の導
体を２個の半円状の導体（２２ｆ　ｌ）　、（２２ｆ２
）で構成したものについて説明したが、第８図に示すよ
うに０形の導体（２２ｆｔ＞の一部が鉄心窓を通過する
ように、鉄心の両側に位置する部分に口出し部（２２ｆ
４）、（２２ｆ６）を設けてもよい。In the above embodiment, the conductor of the shield (22f) is divided into two semicircular conductors (22f l) and (22f2
), but as shown in Figure 8, we have provided openings (22ft) on both sides of the core so that part of the 0-type conductor (22ft) passes through the core window.
4), (22f6) may be provided.

この場合、導体（２２ｆｔ）に更にロＬ１１シ部（２２
ｆ　ｓ　）をシールド（２２ｆ）が設けられる外側巻線
の高圧日出しと接続すれば、一方の口出し部（２２ｆ４
）ｋ高圧側リード（２ｘｄ）と外側巻線の口出しとして
兼用することができる。In this case, in addition to the conductor (22ft), the L11 part (22ft) is
f s ) is connected to the high-voltage sunshade of the outer winding provided with the shield (22f), one of the openings (22f4
)K Can be used as both the high voltage side lead (2xd) and the outlet for the outer winding.

また低圧側リード（２１ｅ）についても、高圧側リード
（２１ｄ）と同様に第５図に示すように低圧側リードと
ほぼ同電位にある外側巻線端部の電界緩和用のシールド
（２２ｈ）を構成する導体（２２ｈｌ）の一部を低圧側
リードの通電路の一部とすることができるとともシこ低
圧側リードは高圧側リード（２１ｄ）と同じ鉄心窓内金
通過させることもできる。Similarly to the high voltage side lead (21d), the low voltage side lead (21e) is also equipped with a shield (22h) for mitigating the electric field at the outer winding end, which is at approximately the same potential as the low voltage side lead, as shown in Figure 5. A part of the constituent conductor (22hl) can be used as a part of the current-carrying path of the low-voltage side lead, and the low-voltage side lead can also be passed through the same iron core window metal as the high-voltage side lead (21d).

さらに上記実施例においては、単位変圧器を３台並列接
続する場合について説明したが、本発明は２台ま友は４
台以上の学位変圧器を並列接続する場合も実施すること
かでき、また単位変圧器においても革相３脚鉄心の鳴合
に限らず、２個以上の主脚と２個の側脚合宿する鉄心を
用いる場合に同様に実施できる。Furthermore, in the above embodiment, the case where three unit transformers are connected in parallel has been explained, but in the present invention, two transformers can be connected in parallel.
It can also be carried out when connecting more than one transformer in parallel, and even in unit transformers, it is not limited to the alignment of three main legs and two side legs, but also the alignment of two or more main legs and two side legs. The same method can be implemented when using an iron core.

以上説明のように本発明によれば、Ｎ個（Ｎ≧１の整数
）の主脚と２個の側１１１４１ヲ有する鉄心の前記Ｎ個
の主脚に巻線を巻装してタンク内ＶＣ収納した単位変圧
器をｎ台（ｌｉ≧２の整数）並置し、第１または第１か
ら第（ｎ−１）の単位変圧器の巻線から引出されたリー
ドを第１１ま／こは第２から第ｎｉでの各単位変圧器の
鉄心の側ｊν４１の内側に位置する鉄心窓内を順次通過
させて第ｎのｒ１５位変圧器の巻線から引出されたリー
ドと並列接続してなし、この第１または第１から第（ｎ
−１）の単位変圧器から引出されたリードは、第１１捷
たは第２から第ｎｉでの単位変圧器の鉄心に巻装された
巻線に設けられかつ上記リードとほぼ同電位にある電界
緩和用シールドの一部を構成する導体の少なくとも一部
を利用して鉄心窓内を通過させたので、絶縁の安定性及
び信頼性が向−ヒするとともに各単位変圧器の鉄心窓寸
法が大きくならず、従って小形軽量で経済的な変圧器を
提供できイ）。As described above, according to the present invention, windings are wound around the N main legs of the iron core having N main legs (an integer of N≧1) and two sides 11141, and the VC inside the tank is The stored unit transformers are arranged in n units (an integer of li≧2) in parallel, and the leads pulled out from the windings of the first unit transformer or the first to (n-1) unit transformers are connected to the 11th transformer. Connected in parallel with the lead drawn out from the winding of the n-th r15 transformer by sequentially passing through the core window located inside the iron core side jν41 of each unit transformer from 2 to ni, This first or first to (n
-1) The lead pulled out from the unit transformer is provided on the winding wound around the core of the unit transformer at the 11th branch or the 2nd to ni, and is at almost the same potential as the above lead. Since at least a part of the conductor constituting a part of the electric field mitigation shield is passed through the core window, the stability and reliability of the insulation is improved, and the core window dimensions of each unit transformer are reduced. Therefore, it is possible to provide a compact, lightweight, and economical transformer.

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

第１図は先に提案されている変圧器の平面図、第２図及
び第３図は第１図のＩＩ　−ＩＩ線断面の異なる例を示
す断面図、第４図は本発明による変圧器の平面図、第５
図は第４図の■−ｖ線朋而図面第６図及び第７図は第４
図の要部の萌面を示す平面図及び正面図、第８図は本発
明の他の実施例を示す平面図である。 （２］）　、　（２功、Ｑ３）・・単位変圧器（２１ａ
）、（２２ａ）、（２３ａ）・・・鉄心（２１ｂ）　、
（２２ｂ）　、　（２３１））・・巻線（２１ｃ　）　
、　（２２ｃ　）　、　（２３ｃ　）　　・タンク（２
１ｄ）、（２２ｄ）、（２３ｄ）・・・高圧側リード（
２１ｅ）、（２２ｅ）、（２３ｅ）　　・低圧側リード
（２２ｂｌ）、（２２ｂ２）、（２２ｂ３）　　・三次
巻融、内側巻線。 外側巻線 （２２ｆ）、（２２ｈ）　　屯界緩第１］用／−ルド（
２２ｆｌ）、（２２ｆ２）、（２２ｆ？）、（２２ｈｌ
）・・導体（２２ｆ３）　　・・・絶縁物 （２２ｆ４）、（２２ｆｆｉ）、（２２ｆ８）　　・口
出し部（７３１７）代理人声理士　則　近　憲　佑（ほ
か１名）第１図 第　　２　　図　　　　　　　　　　第　　３　　間第
４図 第　　５　図 ２ｔ２FIG. 1 is a plan view of the previously proposed transformer, FIGS. 2 and 3 are sectional views showing different examples of the cross section taken along line II-II in FIG. 1, and FIG. 4 is a transformer according to the present invention. Plan view of 5th
The figure is the ■-v line diagram in Figure 4. Figures 6 and 7 are in Figure 4.
FIG. 8 is a plan view and a front view showing the main part of the drawing, and FIG. 8 is a plan view showing another embodiment of the present invention. (2]), (2 success, Q3)... unit transformer (21a
), (22a), (23a)... iron core (21b),
(22b), (231))...Winding (21c)
, (22c) , (23c) ・Tank (2
1d), (22d), (23d)...High voltage side lead (
21e), (22e), (23e) - Low voltage side lead (22bl), (22b2), (22b3) - Tertiary winding, inner winding. Outer winding (22f), (22h)
22fl), (22f2), (22f?), (22hl
)...Conductor (22f3)...Insulator (22f4), (22ffi), (22f8) ・Insulator (7317) Proxy voice attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 2t2

Claims (1)

【特許請求の範囲】[Claims] Ｎ個（Ｎ２２の整数）の主脚と２個の側脚を有する鉄心
の前記Ｎ個の主脚に巻線を巻装してタンク内に収納した
単位変圧器−（ｉ−ｎ台（ｎ≧２の整数）並置し、第１
またー、第１から第（ｎ−１）の単位変圧器の巻線から
引出されたリードを第ｎまたは第２から第ｎまでの各単
位変圧器の鉄心の側脚の内側に位置する鉄心窓内金順次
通過させて第ｎの単位変圧器の巻線から引出゛されたリ
ードと並列接続してなり、この第１またはＭｌから第（
ｎ−１）の単位変圧器から引出されたリードは、第ｎま
たは第２から第ｎまでの単位変圧器の鉄心に巻装された
巻線に設けられかつ上ｄ己す−ドとほぼ同電位にある電
界緩和用シールドの一部を構成する導体の少なくとも一
部全利用して鉄心窓内金通過させたことを特徴とする変
圧器。A unit transformer (i-n units (n ≧2 integer) juxtaposed, the first
In addition, the leads pulled out from the windings of the first to (n-1) unit transformers are connected to the iron cores located inside the side legs of the iron cores of the n-th or second to n-th unit transformers. The leads are connected in parallel with the leads drawn out from the winding of the n-th unit transformer by passing through the window inner metal sequentially, and from this first or Ml to the (
The lead drawn out from the unit transformer n-1) is provided on the winding wound around the iron core of the nth unit transformer or the second to nth unit transformers, and is approximately the same as the upper lead. A transformer characterized in that at least a part of a conductor constituting a part of a shield for mitigating an electric field at a potential is fully utilized to pass through an iron core window inner metal.