JPH0519937Y2 - - Google Patents
Info
- Publication number
- JPH0519937Y2 JPH0519937Y2 JP1983026064U JP2606483U JPH0519937Y2 JP H0519937 Y2 JPH0519937 Y2 JP H0519937Y2 JP 1983026064 U JP1983026064 U JP 1983026064U JP 2606483 U JP2606483 U JP 2606483U JP H0519937 Y2 JPH0519937 Y2 JP H0519937Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- hollow conductor
- insulating
- coil
- immersed
- 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 - Lifetime
Links
- 239000004020 conductor Substances 0.000 claims description 28
- 239000003507 refrigerant Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
Landscapes
- Insulating Of Coils (AREA)
- Transformer Cooling (AREA)
- Housings And Mounting Of Transformers (AREA)
- Coils Of Transformers For General Uses (AREA)
Description
【考案の詳細な説明】
この考案は電気機器の絶縁リード、とくに高電
圧油入変圧器等で使用される絶縁リードの構成に
関するものである。[Detailed Description of the Invention] This invention relates to the structure of insulated leads for electrical equipment, particularly insulated leads used in high voltage oil-immersed transformers and the like.
第1図はこの種従来の絶縁リードを使用した油
入変圧器の全体構成図、第2図は第1図の絶縁リ
ードの部分を拡大して示す断面図、第3図は第1
図の絶縁リードの熱放散の方向を示す説明図であ
る。図において、1は絶縁油2を内部に収容する
タンク、3は口出し部3aを有し電圧・電流が印
加されるコイル、4はコイル3と鎖交するように
配設された鉄心、5はそれぞれコイル3相互間及
びコイル3と鉄心4、タンク1との間を絶縁する
ための絶縁物、6は油中端子部6aを有しタンク
を貫通して取り付けられたブツシング、7は一端
が口出し部3aに他端が油中端子部6aにそれぞ
れ電気的に接続された絶縁リードで、中実導体8
とその外周に形成されたクラフト絶縁紙等からな
る電気絶縁層9とから構成される。10は油中端
子部6aに取り付けられた電界緩和シールドであ
る。11は絶縁油2を冷却するための油配管を介
してタンク1に接続された冷却装置、12は矢印
13の向きに絶縁油2を強制的に循環させる送油
ポンプである。 Figure 1 is an overall configuration diagram of this type of conventional oil-immersed transformer using insulated leads, Figure 2 is an enlarged sectional view of the insulated leads in Figure 1, and Figure 3 is the
FIG. 3 is an explanatory diagram showing the direction of heat dissipation of the insulated leads shown in the figure. In the figure, 1 is a tank containing insulating oil 2, 3 is a coil having an opening 3a and to which voltage and current are applied, 4 is an iron core arranged to interlink with the coil 3, and 5 is a An insulator for insulating between the coils 3 and between the coil 3 and the iron core 4 and the tank 1, 6 a bushing having an oil-immersed terminal part 6a and installed through the tank, and 7 an open end. The solid conductor 8 is an insulated lead whose other end is electrically connected to the oil-immersed terminal part 6a in the part 3a.
and an electrically insulating layer 9 made of kraft insulating paper or the like formed on its outer periphery. Reference numeral 10 denotes an electric field relaxation shield attached to the oil-immersed terminal portion 6a. 11 is a cooling device connected to the tank 1 via an oil pipe for cooling the insulating oil 2, and 12 is an oil pump for forcibly circulating the insulating oil 2 in the direction of the arrow 13.
上記のように構成された従来の油入変圧器の絶
縁リードにおいては、通電により発生する絶縁リ
ード7の発熱は第3図の矢印14に示すように中
実導体8の径方向に電気絶縁層9を通して絶縁油
2に放散され、従つて、この間の熱抵抗と所定の
許容温度上昇値とから中実導体8の必要な断面積
が設定される。 In the insulated leads of the conventional oil-immersed transformer configured as described above, the heat generated in the insulated leads 7 due to current conduction is absorbed by the electric insulating layer in the radial direction of the solid conductor 8, as shown by the arrow 14 in FIG. The required cross-sectional area of the solid conductor 8 is therefore set from the thermal resistance during this time and a predetermined allowable temperature rise value.
しかるに、上記のような従来の油入変圧器の絶
縁リードにおいては、例えばUHV級変圧器等の
ように高電圧になると電気絶縁層9の厚さが非常
に大きくなるが、一般に電気絶縁層9は熱の不良
導体でありこの部分の熱抵抗が大きくなるので、
中実導体8の必要断面積が非常に大きくなり、材
料費の増大とともに作業性が悪くなるという欠点
があつた。 However, in the insulated leads of the conventional oil-immersed transformers as described above, the thickness of the electrical insulating layer 9 becomes extremely large when the voltage is high, such as in a UHV class transformer. is a poor conductor of heat and the thermal resistance of this part increases, so
The required cross-sectional area of the solid conductor 8 becomes extremely large, resulting in an increase in material cost and poor workability.
この考案はこのような従来のものの欠点を解消
するためになされたもので、外周面に電気絶縁層
が形成され内部に絶縁性冷媒が通流する中空導体
で構成することにより、上記冷媒により内部から
直接冷却され安価で作業性の良好な電気機器の絶
縁リードを提供することを目的とするものであ
る。 This idea was made to eliminate the drawbacks of the conventional ones, and by constructing a hollow conductor with an electrically insulating layer formed on the outer circumferential surface and an insulating refrigerant flowing inside, the refrigerant can flow inside the conductor. The purpose of this invention is to provide an insulated lead for electrical equipment that is directly cooled from the heat source, is inexpensive, and has good workability.
以下、この考案の一実施例における油入変圧器
の絶縁リードを図面について説明する。第4図は
上記油入変圧器の全体構成図、第5図は第4図の
絶縁リードの部分を拡大して示す断面図、第6図
は第4図の絶縁リードの熱放散と油流との方向を
示す説明図である。図において、タンク1、絶縁
油2、コイル3、口出し部3a、鉄心4、絶縁物
5、ブツシング6、油中端子部6a、電界緩和シ
ールド10、冷却装置11、送油ポンプ12、油
流の矢印13は従来の場合と同様であるから説明
を省略する。15は外周面に電気絶縁層16が形
成された中空導体、17及び18は中空導体15
の両端に固着された一対の接続端子で、中空導体
15の内径部に絶縁油2が流通可能にするととも
に、接触による発熱もある接続部は中空導体15
の内径部の中心に位置して通電可能なようにそれ
ぞれ接合されて、それぞれにコイルの口出し部3
a及び油中端子部6aが接続されている。そして
絶縁リード19は中空導体15とその外周面の電
気絶縁層16と、一対の接続端子17,18とで
構成されており、絶縁リード19のコイルの口出
し部3a側は周囲とは適当に間隔が設けられ、油
中端子部6a側は、電界緩和シールド10及びブ
ツシングの油中端子部6aとも適当な間隔が設け
られている。 Hereinafter, an insulated lead for an oil-immersed transformer according to an embodiment of this invention will be described with reference to the drawings. Figure 4 is an overall configuration diagram of the oil-immersed transformer, Figure 5 is an enlarged sectional view of the insulated leads in Figure 4, and Figure 6 is the heat dissipation and oil flow of the insulated leads in Figure 4. FIG. In the figure, a tank 1, insulating oil 2, coil 3, outlet 3a, iron core 4, insulator 5, bushing 6, oil-immersed terminal 6a, electric field relaxation shield 10, cooling device 11, oil pump 12, oil flow Since the arrow 13 is the same as in the conventional case, a description thereof will be omitted. 15 is a hollow conductor with an electrical insulating layer 16 formed on its outer peripheral surface; 17 and 18 are hollow conductors 15;
A pair of connecting terminals are fixed to both ends of the hollow conductor 15 to allow the insulating oil 2 to flow through the inner diameter of the hollow conductor 15.
are located at the center of the inner diameter part of the coil and are connected to each other so as to be energized, and each has a coil outlet 3.
a and the oil-immersed terminal portion 6a are connected. The insulated lead 19 is composed of a hollow conductor 15, an electrically insulating layer 16 on its outer peripheral surface, and a pair of connection terminals 17 and 18, and the coil outlet 3a side of the insulated lead 19 is spaced appropriately from the surroundings. The submerged terminal portion 6a side is provided with an appropriate distance from the electric field relaxation shield 10 and the submerged terminal portion 6a of the bushing.
上記のように構成されたこの考案における油入
変圧器の絶縁リード19は中空導体15の通電に
よる発熱は第6図の矢印23に示すように、中空
導体15の内径側へ放出され、接触による発熱も
ある接続端子17,18部の発生熱も絶縁油2に
伝達されて、絶縁油2が温度上昇することによ
り、中空導体15の内径部を上昇する油流となる
いわゆるサーモサイフオン効果によつて、外周面
の電気絶縁層16の厚さに関係なく良好な冷却状
態となるので、中空導体15の必要な断面積を低
減することができ、軽量で安価な導体にすること
ができるとともに強制的に油流を得る手段を用い
ることなく良好な冷却効果が得られる。 In the insulated lead 19 of the oil-immersed transformer of this invention constructed as described above, the heat generated by energization of the hollow conductor 15 is released toward the inner diameter side of the hollow conductor 15 as shown by the arrow 23 in FIG. The heat generated by the connecting terminals 17 and 18, which generate heat, is also transferred to the insulating oil 2, and the temperature of the insulating oil 2 rises, resulting in a so-called thermosiphon effect, which causes an oil flow to rise up the inner diameter of the hollow conductor 15. Therefore, a good cooling condition is achieved regardless of the thickness of the electrical insulating layer 16 on the outer peripheral surface, so the necessary cross-sectional area of the hollow conductor 15 can be reduced, and the conductor can be made lightweight and inexpensive. A good cooling effect can be obtained without using any means for forcibly obtaining an oil flow.
なお、絶縁性冷媒としては絶縁油に限らずSF6
ガス等の絶縁ガスにおいても適用することができ
る。また、絶縁リード19は電気絶縁性が要求さ
れ電気機器の通電部の間の通電を目的とするもの
である限り、変圧器に限らずリアクトル等種々の
電気機器において使用することができる。 Note that insulating refrigerants include not only insulating oil but also SF 6 .
It can also be applied to insulating gases such as gases. Further, the insulating lead 19 can be used not only in transformers but also in various electrical devices such as reactors, as long as electrical insulation is required and the purpose is to conduct electricity between current-carrying parts of the electrical device.
この考案は、以上説明したように、絶縁リード
の構成を外周面に電気絶縁層が形成され、内径部
に絶縁性冷媒が流通するように両端が開口する中
空導体とし、両端内径部の中心位置にそれぞれ接
続端子を設け、両端部が高低差を持つように配置
したことにより、中空導体及び接続端子部の通電
による発熱は中空導体内の絶縁油に伝達され、絶
縁油の温度上昇によるサーモサイフオン効果の冷
媒流によつて冷却される。特に接続端子部を中空
導体内径部の中心位置にしたことはこの部分を効
果的に冷却するとともにサーモサイフオン効果に
よる冷媒流を加速する効果があり、強制的に冷媒
流を与える手段を用いることなく冷媒流が得ら
れ、外周面の電気絶縁層の厚さに関係なく良好な
冷却状態となるので、中空導体の必要断面積を低
減した軽量で安価な絶縁リードが得られるという
効果がある。 As explained above, the insulated lead is made of a hollow conductor with an electrically insulating layer formed on the outer circumferential surface and open at both ends so that an insulating refrigerant flows through the inner diameter, and the center of the inner diameter of both ends is By providing a connection terminal on each side and arranging the two ends so that there is a difference in height, the heat generated by energization of the hollow conductor and the connection terminal is transmitted to the insulating oil inside the hollow conductor, and the temperature rise of the insulating oil causes the thermosifter to Cooled by on-effect refrigerant flow. In particular, placing the connection terminal at the center of the inner diameter of the hollow conductor has the effect of effectively cooling this part and accelerating the refrigerant flow due to the thermosiphon effect, so it is recommended to use a means to force the refrigerant flow. Since a coolant flow can be obtained without any problem, and a good cooling condition can be achieved regardless of the thickness of the electrical insulating layer on the outer circumferential surface, there is an effect that a lightweight and inexpensive insulated lead with a reduced required cross-sectional area of the hollow conductor can be obtained.
第1図は従来の絶縁リードを使用した油入変圧
器の全体構成図、第2図は第1図の絶縁リードの
部分を拡大して示す断面図、第3図は第1図の絶
縁リードの熱放散の方向を示す説明図、第4図は
この考案の一実施例における絶縁リードを使用し
た油入変圧器の全体構成図、第5図は第4図の絶
縁リードの部分を拡大して示す断面図、第6図は
第4図の絶縁リードの熱放散と油流との方向を示
す説明図である。図において、2は絶縁性冷媒と
しての絶縁油、3aは電気機器の通電部としての
口出し部、6aは電気機器の通電部としての油中
端子部、15は中空導体、16は電気絶縁層、1
7,18は一対の接続端子、19は絶縁リードで
ある。なお、図中同一符号は同一又は相当部分を
示す。
Figure 1 is an overall configuration diagram of an oil-immersed transformer using conventional insulated leads, Figure 2 is an enlarged cross-sectional view of the insulated leads in Figure 1, and Figure 3 is the insulated leads in Figure 1. Fig. 4 is an overall configuration diagram of an oil-immersed transformer using insulated leads in an embodiment of this invention, and Fig. 5 is an enlarged view of the insulated lead portion of Fig. 4. FIG. 6 is an explanatory diagram showing the direction of heat dissipation and oil flow of the insulated lead shown in FIG. 4. In the figure, 2 is an insulating oil as an insulating refrigerant, 3a is an opening part as a current-carrying part of an electric device, 6a is a submerged terminal part as a current-carrying part of an electric device, 15 is a hollow conductor, 16 is an electric insulating layer, 1
7 and 18 are a pair of connection terminals, and 19 is an insulated lead. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
イルと鉄心で構成される電気機器本体と、上記タ
ンクを貫通して取付けられたブツシングと、上記
コイルの口出し部と上記ブツシングの油中端子部
との間を電気的に接続する絶縁リードとで構成さ
れ、該絶縁リードは、両端が開口する中空導体
と、この中空導体の外周を絶縁する絶縁部とから
なり、上記中空導体両端内径部に絶縁性媒体を流
通可能にすると共に、中空導体内径の中心位置に
接続部を有する接続端子が通電可能に両端部にそ
れぞれ接合され、一方の上記接続部には上記コイ
ルの口出し部が、他方の上記接続部にはブツシン
グの油中端子部が接続されており、さらに、上記
中空導体の両端部はお互いに高低差を持つように
配置されていることを特徴とする電気機器。 An electrical equipment main body consisting of a coil and an iron core stored together with an insulating refrigerant inside a tank, a bushing installed through the tank, an outlet part of the coil, and an oil-immersed terminal part of the bushing. The insulated lead consists of a hollow conductor that is open at both ends, and an insulating part that insulates the outer periphery of the hollow conductor. Connecting terminals that allow the medium to flow and have a connecting portion at the center of the inner diameter of the hollow conductor are connected to both ends so as to be electrically conductive, and one of the connecting portions has an outlet portion of the coil, and the other connecting terminal has a connecting portion at the center of the inner diameter of the hollow conductor. An oil-immersed terminal portion of a bushing is connected to the portion, and both ends of the hollow conductor are arranged so as to have a difference in height from each other.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2606483U JPS59131121U (en) | 1983-02-22 | 1983-02-22 | Insulated leads for electrical equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2606483U JPS59131121U (en) | 1983-02-22 | 1983-02-22 | Insulated leads for electrical equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59131121U JPS59131121U (en) | 1984-09-03 |
JPH0519937Y2 true JPH0519937Y2 (en) | 1993-05-25 |
Family
ID=30157021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2606483U Granted JPS59131121U (en) | 1983-02-22 | 1983-02-22 | Insulated leads for electrical equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59131121U (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5113990A (en) * | 1974-07-26 | 1976-02-03 | Hitachi Ltd |
-
1983
- 1983-02-22 JP JP2606483U patent/JPS59131121U/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5113990A (en) * | 1974-07-26 | 1976-02-03 | Hitachi Ltd |
Also Published As
Publication number | Publication date |
---|---|
JPS59131121U (en) | 1984-09-03 |
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