JPS5932118A - Transformer - Google Patents

Abstract

PURPOSE:To allow winding lead of unit transformer to pass through window of iron core of other unit transformer and thereby simplify the structure of parallel connection of plural unit transformers by forming the lead with insulating lead which is flat in the axial direction of winding in order to make the lead pass through the window of iron core and by locating it in the vicinity of winding being set almost the same potential as the lead. CONSTITUTION:The interiors of two units of unit transformers 10 and 11 wherein the windings 10b and 11b are wound around the iron cores 10a and 11a are housed in the tanks 10c and 11c, a high voltage lead 10d and low voltage lead 10e of the secondary side of external winding extended from the winding 10b are respectively caused to pass through the individual windows of iron cores 11a through the ducts 14 and are connected to the bushings 16b, 17b in the pockets 16a, 17a provided at the side of tank 11c. Meanwhile the high voltage lead 11d and low voltage lead 113 extended from the winding 11b are respectively connected to the bushings 16b and 17b, but when the high voltage lead 10d and low voltage lead 11e pass the window of transformer iron core, these leads pass the vicinity of the same potential zone as the winding 11b.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は単相変圧器、ｔどの単位変圧器を複数台並列接
続して使用する変圧器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a single-phase transformer and a transformer in which a plurality of unit transformers such as t-type transformers are connected in parallel.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

近年変圧器などの静止誘導電器においては、高電圧・大
容量化の傾向を示し、重量・容積も当然増加傾向にある
。このため、鉄道輸送制限、道路輸送制限から従来より
３相変圧器を単相３台に分割し、さらにその単相変圧器
を２分割、３分割して輸送し、分割された単位変圧器を
現地で並列接続して単相変圧器を形成する方式がとられ
る。In recent years, static induction electric appliances such as transformers have shown a trend toward higher voltage and larger capacity, and naturally their weight and volume also tend to increase. For this reason, due to railway transportation restrictions and road transportation restrictions, conventionally a three-phase transformer is divided into three single-phase units, and the single-phase transformer is then divided into two or three parts for transportation, and the divided unit transformers are A method is used where they are connected in parallel on-site to form a single-phase transformer.

これらの単位変圧器の接続方式として、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
窓内金通過させて、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講造が先に提案されている。As a connection method for these unit transformers, the lead drawn out from the winding of the first unit transformer is passed through the iron core window metal of the other unit transformer, and then the lead drawn out from the winding of the other unit transformer. Kozo, which connects the lead in parallel, has previously been proposed.

そしてこの場合、一方の単位変圧器の巻線から引出され
たリードが他方の単位変圧器の鉄心窓内金通過する部分
においては、このリードとは４ｆ同戒位にある巻線部分
に電界緩和用シールドを設けるとともにこのシールドに
切刃欠き部を設けてこの切り欠き部内にリードを配置す
るものであった。In this case, in the part where the lead drawn out from the winding of one unit transformer passes through the iron core window metal of the other unit transformer, the electric field is relaxed in the part of the winding that is in the same position as this lead. In addition to providing a shield for use with the device, the shield is provided with a cutout portion, and the lead is placed within the cutout portion.

しかしながらこのように構成された分割形の変王４にお
いては、リードを巻線の中央部または上部あるいは下部
を通過させるために、巻線の中央部または上部あるいは
下部に直昇緩和用シールドを設ける必要があり、経済的
にも、巻線の小形化にも、得策でない。しかも電界緩和
用シールドの一部を切り欠くため、シールド自体が高価
になるばかりか、巻線に働く機械力に対して荷重面積が
減少し、部分的に面圧が上昇してしまう問題がある。However, in the split-type Hen-Oh 4 configured in this way, a shield for direct relief is provided at the center, top, or bottom of the winding in order to allow the lead to pass through the center, top, or bottom of the winding. This is necessary, and is not a good idea both economically and in terms of reducing the size of the winding. Moreover, since a part of the electric field mitigation shield is cut out, not only does the shield itself become expensive, but the load area for the mechanical force acting on the windings decreases, resulting in an increase in surface pressure in some areas. .

〔発明の目的〕[Purpose of the invention]

本発明は上記の点を考慮してなされたもので、単位変圧
器の巻線リードを他の単位変圧器の鉄心窓内全通過させ
て複数台の単位変圧器を並列接続する場合に構造を単純
化して、安価に製作可能とし、しかも、巻線に働く機械
力（（対して堅固な構造を有する変圧器を提供すること
を目的とする。The present invention has been made in consideration of the above points, and is designed to improve the structure when connecting a plurality of unit transformers in parallel by passing the winding lead of a unit transformer completely through the core window of another unit transformer. The purpose of the present invention is to provide a transformer that is simple, can be manufactured at low cost, and has a mechanical force acting on the windings and has a strong structure.

〔発明の概要〕[Summary of the invention]

かかる目的を達成するため、本発明は鉄心窓内金リード
が貫通する場合に、その貫通リード金、巻線軸方向に偏
平な絶縁リードで構成すると共に、このリードとほぼ同
電位の巻線部分の近傍に配置したものである。In order to achieve this object, the present invention consists of an insulated lead that is flat in the direction of the winding axis when the metal lead in the iron core window penetrates, and a part of the winding that has approximately the same potential as this lead. It is placed nearby.

〔発明の実施例〕[Embodiments of the invention]

以下本発明の一実施例について、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１図は単相単位変圧器２台を並列接続して単相容量を
単器の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を通過するに当って絶
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、特に大きな絶縁距離を必要としないことから内
側巻線のリードの図示を省略し、外側巻線のリードのみ
を図示している。FIG. 1 shows a winding lead connection structure when two single-phase unit transformers are connected in parallel to make the single-phase capacity twice that of a single transformer. When the winding leads of a unit transformer pass through the core window, it is the high-voltage side lead of the outer winding that poses an insulation problem.This determines the core window dimensions, and the inner winding has a relatively low voltage. Since the insulation distance is low and does not require a particularly large insulation distance, the leads of the inner winding are omitted and only the leads of the outer winding are shown.

すなわち、第１図に示すように２台の単位変圧器１０．
１１はそれぞれ鉄心１０ａ、ｌｌａに巻線１０１）。That is, as shown in FIG. 1, two unit transformers 10.
11 are windings 101 on the iron cores 10a and lla, respectively.

１１ｂ’ｅ巻装゛した変圧器中身をタンクｌ０ＣＩＩＩ
Ｃ内に収納して構成される。単位変圧器１０の巻線１０
ｂから引出された外側巻線の二次側の高圧側リード１０
ｄ、低圧側リード１０ｅは、それぞれリードダクト１４
．１４を通った後、単位変圧器１１の鉄心１１ａの別個
の鉄心窓内金通過し、単位変圧器１１のタンク１．ＩＣ
の側面に配設したブッシングポケット１６ａ、１７ａの
ブッシング１６ｂ、１７ｂ　Ｋそれぞれ接続される。一
方単位変圧器】１の巻線ｉｔｂから引出された高圧側リ
ードｌｉｄ％低圧側リードｌｉｅもそれぞれブッシング
１６ｂ、１７ｂに接続される。単位変圧器１０の巻線１
０ｂから引出された高圧側リード１０ｄ、低圧側リード
ｌｌｅが単位変圧器１１の鉄心窓内金通過する際には第
２図及び第３図に示すように巻線１１ｂと同電位部の近
傍を通るように配置する。すなわち、巻線１１ｂは内側
巻線１８と外側巻線１９を有し、外側巻線１９は上下振
分は巻き（巻線軸方向中央を一端として上部の巻線と下
部の巻線が並列接続されている巻線）に巻かれている。The contents of the transformer wrapped in 11b'e are transferred to tank l0CIII.
It is configured by being stored in C. Winding 10 of unit transformer 10
High voltage side lead 10 on the secondary side of the outer winding drawn out from b
d, the low pressure side lead 10e is connected to the lead duct 14, respectively.
．． 14, it passes through a separate core window inner metal of the core 11a of the unit transformer 11, and then enters the tank 1.1 of the unit transformer 11. IC
The bushings 16b and 17bK of the bushing pockets 16a and 17a arranged on the side surfaces of the bushings 16b and 17b are respectively connected. On the other hand, the high-voltage side lead lid% and the low-voltage side lead lie drawn out from the winding itb of unit transformer 1 are also connected to bushings 16b and 17b, respectively. Winding 1 of unit transformer 10
When the high-voltage side lead 10d and the low-voltage side lead lle pulled out from the unit transformer 11 pass through the metal inside the core window of the unit transformer 11, as shown in FIGS. 2 and 3, they pass near the same potential part as the winding 11b. Place it so that it passes through. That is, the winding 11b has an inner winding 18 and an outer winding 19, and the outer winding 19 has a vertical distribution (the upper winding and the lower winding are connected in parallel with the center of the winding axis as one end). winding).

この外側巻線１９の軸方向中央部と高圧側リード１０ｄ
とはほぼ同電位にあるので、高圧側り一ド１０ｄ　Ｉ／
′ｉ外側巻線１９の外側に設けた円筒状絶縁バーリヤ２
２ａ　、　２２ｂを貫通埒せ、外側巻線１９の軸方向中
央部の外周面と絶縁バーリヤ２２ｂとの間を通して鉄心
１１ａの鉄心窓を通過した後、絶縁バーリヤ２２ｂ、２
２ａ　ｆ貫通させてブッシング（図示せず）に導く。こ
の高圧＋１’ｌｌｌ　ＩＪ−ド１０ｄは軸方向長さが半
径方向長さに比べて長くなっている偏平形に構成され、
その上下端の角部は適当な半径で丸みが付けられて゛ば
界集中が緩和されるようになっている。The axial center of this outer winding 19 and the high voltage side lead 10d
Since they are at almost the same potential, the high voltage side is 10d I/
'i Cylindrical insulation barrier 2 provided outside the outer winding 19
2a, 22b, pass through the core window of the iron core 11a between the outer circumferential surface of the axially central part of the outer winding 19 and the insulation barrier 22b, and then pass through the insulation barrier 22b, 2.
2a f and lead to a bushing (not shown). This high pressure +1'llll IJ-do 10d is configured in a flat shape with an axial length longer than a radial length,
The upper and lower corners are rounded with an appropriate radius to alleviate field concentration.

また高圧側リード１０ｄの表面は絶縁紙などの絶縁物に
よυ被覆ちれている。この高圧側リード１０ｄは絶縁物
からなる詰め物２３によシ上下方向から固定されている
。Further, the surface of the high voltage side lead 10d is covered with an insulating material such as insulating paper. This high voltage side lead 10d is fixed from above and below by a padding 23 made of an insulating material.

一方、低圧側リード１０ｅは外側巻線１９の辷。On the other hand, the low voltage side lead 10e is the arm of the outer winding 19.

下端部とほぼ同電位であるので、高圧側リード１０ｄと
同様に、偏平形に構成し、絶縁バーリヤ２２ａ、２２ｂ
　ｆ貫通させ、外側巻線１９の軸方向上部または下部の
外周面と絶縁バーリヤ２２ｂとの間に配置して鉄心１１
ａの鉄心窓を通過させる。Since it has almost the same potential as the lower end, it is constructed in a flat shape like the high voltage side lead 10d, and the insulation barriers 22a, 22b are
f and is disposed between the outer circumferential surface of the upper or lower part of the outer winding 19 in the axial direction and the insulation barrier 22b.
Pass through the iron core window a.

このように構成すれば、鉄心窓内金貫通する高圧側及び
低圧側リード１０ｄ、１０ｅ　ｆ外側巻線１９の外部に
配置しているため、巻線とリードをそれぞれ単独に製作
することが可能であり、一般の変圧器巻線と同様の製作
方法を適用できろうまた高圧側リ一　ド１０ｄが外側巻
線１９の軸方向中央部近傍に配置される場合も、巻線中
央部に屯界緩和用シールドを設ける必要がないため、巻
線をコンパクトにしかも単純に構成できるので安価に製
作できる。With this configuration, the high-voltage side and low-voltage side leads 10d and 10e, which pass through the inner metal of the iron core window, are placed outside the outer winding 19, so the winding and the leads can be manufactured separately. However, if the high-voltage side lead 10d is placed near the axial center of the outer winding 19, it is possible to apply a manufacturing method similar to that of a general transformer winding. Since there is no need to provide a shield, the winding can be made compact and simple, and can be manufactured at low cost.

さらに電界緩和用シールドの切り欠きが存在しないため
、巻線各部の巻線半径方向断面積が一定となり、巻線に
働く機械力て対して堅固な構造が得られる。Furthermore, since there is no cutout in the electric field mitigation shield, the cross-sectional area of each part of the winding in the winding radial direction is constant, resulting in a structure that is strong against mechanical forces acting on the winding.

また高圧側及び低圧側リード１０ｄ、　Ｔｏｅが外側巻
線とほぼ同電位部に配置され、しかも、偏平形のため、
リードが円形断面の場合に比ベリードと鉄心側脚間の絶
縁寸法を最小限にすることが可能である。In addition, the high-voltage side and low-voltage side leads 10d and Toe are arranged at almost the same potential as the outer winding, and because they are flat,
When the lead has a circular cross section, it is possible to minimize the insulation dimension between the lead and the core side leg.

なお、第４図に示すように、冒圧側リード１０ｄ金外側
巻線の外側の第１番目の絶縁バーリア２２ｂと第２番目
の絶縁バーリア２２ａの間に配置し、軸方向の１湧さは
高圧側リードｌＯｄと・・１ぼ同電位にある外側巻線１
９の高さと等しく配置して構成しても同様の効果が得ら
れる。また単位変圧器を３台以上設けて並列接続する場
合にも同様に実施できる。As shown in FIG. 4, the pressure side lead 10d is arranged between the first insulating barrier 22b and the second insulating barrier 22a outside the gold outer winding, and one spring in the axial direction is high voltage. The outer winding 1 is at almost the same potential as the side lead lOd.
A similar effect can be obtained by arranging the height equal to the height of 9. Further, the same method can be applied when three or more unit transformers are provided and connected in parallel.

〔発明の効果〕〔Effect of the invention〕

以上のように本発明によれば、単位変圧器のリードを他
の単位変圧器の鉄心窓内を貫通させて、複数台の単位変
圧器を並列接続する場合、その貫通リードを巻線軸方向
に偏平な絶縁リードで構成するとともにこのリードとほ
ぼ同電位の巻線部分の近傍に配置したので、構造を単純
化して安価に製作でき、しかも巻線に働く機械力に対し
て堅固な構造を有する変圧器を提供することができる。As described above, according to the present invention, when a plurality of unit transformers are connected in parallel by passing the lead of a unit transformer through the core window of another unit transformer, the lead of the unit transformer is inserted in the winding axis direction. It is composed of flat insulated leads and is placed near the winding part that has almost the same potential as the lead, so the structure can be simplified and manufactured at low cost, and it has a structure that is strong against mechanical forces acting on the winding. A transformer can be provided.

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

第２図の１−［線断面図、第４図は本発明の他の実施例
を示す断面図である。 ］、Ｏａ、１１ａ　　鉄心　　　　１０ｂ、ｌｌｂ　　
巻線］Ｑｃ、］、ＩＣタンク　　　　１０ｄ　、　１１
ｄ　　高圧側リード１０ｅ、ｌｉｅ　　低圧側リード　
１８・・内側巻線１９　　外側巻線　　　　　　２ｚａ
　、　２２ｂ　　絶縁ノ（−１ツヤ（７３１７）　　代
理人　弁理士　則　近　憲　佑　０１力１１名）第・３
図 第４図FIG. 2 is a sectional view taken along the line 1--[FIG. 4 is a sectional view showing another embodiment of the present invention. ], Oa, 11a Iron core 10b, llb
Winding] Qc, ], IC tank 10d, 11
d High pressure side lead 10e, lie Low pressure side lead
18... Inner winding 19 Outer winding 2za
, 22b Insulation (-1 Tsuya (7317) Agent Patent Attorney Noriyuki Chika 01 Riki 11 people) No. 3
Figure 4

Claims (1)

【特許請求の範囲】[Claims] 鉄心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ｎ台（ｎ≧２の整数）を並置し、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または第１から第（ｎ−１）の単位変
圧器から引出されたリードを、巻線軸方向に偏平な絶縁
リードで構成すると共に第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の、上記リードとほ
ぼ同１区位となる部分の近傍に配置したことを特徴とす
る変圧器。n unit transformers (an integer of n≧2) with windings wound around the main leg of the iron core and stored in a tank are arranged side by side, and the first or first to (n-1) unit transformers are The leads pulled out from the windings are sequentially passed through the iron core window inner metal located inside the side legs of the iron core of each unit transformer from the nth or second to the nth unit transformer.
The lead drawn out from the winding of the unit transformer is connected in parallel with the lead drawn out from the winding of the unit transformer, and the lead drawn out from the first or first to (n-1) unit transformer is A transformer comprising a lead and disposed near a portion of the winding wound around the iron core of the n-th or second to n-th unit transformer, which is approximately in the same position as the lead. vessel.