JPH0799726B2 - Gas insulated static induction - Google Patents

Gas insulated static induction

Info

Publication number
JPH0799726B2
JPH0799726B2 JP61294803A JP29480386A JPH0799726B2 JP H0799726 B2 JPH0799726 B2 JP H0799726B2 JP 61294803 A JP61294803 A JP 61294803A JP 29480386 A JP29480386 A JP 29480386A JP H0799726 B2 JPH0799726 B2 JP H0799726B2
Authority
JP
Japan
Prior art keywords
tank
bushing
gas
temperature
static induction
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
Application number
JP61294803A
Other languages
Japanese (ja)
Other versions
JPS63148605A (en
Inventor
康二 小井戸
彰宥 山口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP61294803A priority Critical patent/JPH0799726B2/en
Publication of JPS63148605A publication Critical patent/JPS63148605A/en
Publication of JPH0799726B2 publication Critical patent/JPH0799726B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Transformer Cooling (AREA)
  • Housings And Mounting Of Transformers (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、自然循環自然冷却方式のガス絶縁静止誘導電
器に関する。
TECHNICAL FIELD The present invention relates to a gas-insulated static induction machine of natural circulation and natural cooling type.

〔従来の技術〕[Conventional technology]

従来の自然循環自然冷却方式のガス絶縁静止誘導電器に
おける外部引出し用ブッシングの配置は第11図または第
12図に示す通りであり、中身本体2を収納し、内部空間
に絶縁および冷却媒体としてSF6ガスのような高耐圧の
ガス5を封入したタンク1の上部端面または上部側面に
ブッシング6を取付けていた。これは、一般の油入変圧
器等と同様に内部配線の容易さや外部ケーブル引き回し
の容易さ等の理由によるが、タンク1と放熱器9内を循
環するガスの対流によって中身本体2の放熱冷却を行な
う自然循環自然冷却方式のガス絶縁静止誘導電器におい
ては、運転時にタンク内の上の方ほどガス温度が高くな
るので、第11図、第12図のようにタンク1の上部にブッ
シング6を取付けた場合、ブッシング6は静止誘導電器
の最高温部に置かれていることになる。
Fig. 11 or Fig. 11 shows the arrangement of the bushing for external drawing in a conventional gas-insulated static induction machine with natural circulation and natural cooling.
As shown in FIG. 12, a bushing 6 is attached to the upper end face or the upper side face of a tank 1 in which a main body 2 is housed and a high pressure resistant gas 5 such as SF 6 gas is sealed as an insulating and cooling medium in an internal space. Was there. This is because the internal wiring and the external cable can be easily routed like a general oil-filled transformer. However, the convection of the gas circulating in the tank 1 and the radiator 9 dissipates heat and cools the main body 2. In the case of a natural circulation natural cooling type gas-insulated static induction electric machine that performs the above, since the gas temperature becomes higher in the upper part of the tank during operation, the bushing 6 is installed above the tank 1 as shown in FIGS. 11 and 12. When installed, the bushing 6 is located in the hottest part of the static induction machine.

他のブッシング配置例として、沸騰冷却式変圧器では、
実開昭59−166426号に記載のように、絶縁および冷却媒
体の蒸気中よりも絶縁性能の優れた凝縮液中にブッシン
グを配置した方がブッシング相互間およびブッシングと
接地部分との間の絶縁距離を短縮できることから、タン
ク内のスペースも考慮して、タンク下部側面にブッシン
グを取付けたものがあり、また油入変圧器では、実開昭
60−57110号に記載のように、コイルからのリード線引
出し位置と高さを合わせるため、タンク側面中央部にブ
ッシング収納ポケットを設け、該ポケットの先端部にブ
ッシングを取付けているものもある。
As another bushing arrangement example, in a boiling cooling type transformer,
As described in Japanese Utility Model Laid-Open No. 59-166426, it is better to arrange the bushings in the condensate, which has better insulation performance than the vapor of the insulation and cooling medium, between the bushings and between the bushing and the grounded portion. Since the distance can be shortened, there is a type with a bushing attached to the lower side of the tank in consideration of the space inside the tank.
As described in No. 60-57110, in order to match the lead wire withdrawal position from the coil and the height, a bushing storage pocket is provided in the center of the side surface of the tank, and a bushing is attached to the tip of the pocket.

しかし、上記沸騰冷却式変圧器の例では、熱伝導率の高
い凝縮液の対流によりタンク上、下部の温度差は10℃程
度と比較的小さいため、タンク下部にブッシングを配置
しても、その部分の温度は変圧器の最高温部の温度と大
差がなく、また上記油入変圧器の例でも、ブッシング取
付位置が油面に近いため、ブッシングは変圧器のほぼ最
高温部に置かれていることになる。
However, in the example of the boiling cooling type transformer, the temperature difference between the upper and lower parts of the tank due to convection of the condensate with high thermal conductivity is relatively small at about 10 ° C, so even if the bushing is arranged at the lower part of the tank, The temperature of the part is not much different from the temperature of the hottest part of the transformer, and in the above oil-filled transformer example, the bushing installation position is close to the oil level, so the bushing is placed almost at the hottest part of the transformer. Will be there.

したがって、これら従来技術では、いずれもブッシング
の材料として、許容温度が中身本体と同程度の材料を使
用する必要がある。特に、自然循環自然冷却方式のガス
絶縁静止誘導電器では、経済上および寸法や電器的性能
等の理由から、中身本体の耐熱区分として通常E種以上
が採用されており、また絶縁性向上のため封入ガス圧力
をゲージ圧で1kg/cm2程度と高くしている関係上、シー
ル性能も考慮してブッシングには使用許容温度が高く、
かつ寸法精度の良い耐熱性エポキシ樹脂ブッシングが使
用されていた。
Therefore, in all of these conventional techniques, it is necessary to use, as the material of the bushing, a material having an allowable temperature of the same degree as that of the content body. In particular, the natural circulation natural cooling type gas-insulated static induction equipment usually uses Class E or higher as the heat-resistant classification of the main body for economic reasons, size and electrical performance, and to improve insulation. Since the enclosed gas pressure is as high as about 1 kg / cm 2 in gauge pressure, the bushing has a high allowable operating temperature in consideration of sealing performance.
In addition, heat-resistant epoxy resin bushings with good dimensional accuracy were used.

〔発明が解決しようとする問題点〕[Problems to be solved by the invention]

上記のように従来の自然循環自然冷却方式のガス絶縁静
止誘導電器では、最高温部であるタンク上部にブッシン
グを取付けていたため、中身本体の耐熱区分をE種以上
とした場合、ブッシングにもこれと同程度の高温使用に
耐えうる耐熱性エポキシ樹脂ブッシングを使用する必要
があり、この耐熱エポキシ樹脂ブッシングは、高温下で
の耐クラック性、熱安定性の向上をはかる必要上、許容
温度の高い高価な耐熱性エポキシ樹脂を材料として用い
ているため、JEC−211(エポキシ樹脂ブッシング)によ
る一般形エポキシ樹脂ブッシングに比べ倍近い高価格に
なるばかりでなく、耐熱性や機械的強度向上のため樹脂
に混入する添加剤の影響で破壊電圧が低下し、これを補
償するためにブッシングの寸法が大きくなるという欠点
を有していた。
As described above, in the conventional natural circulation natural cooling type gas-insulated static induction electric device, the bushing was attached to the upper part of the tank, which is the highest temperature part. It is necessary to use a heat resistant epoxy resin bushing that can withstand high temperature use at the same level as, and this heat resistant epoxy resin bushing has a high allowable temperature because it needs to improve crack resistance and thermal stability at high temperatures. Since an expensive heat-resistant epoxy resin is used as the material, not only is the price twice as high as the general type epoxy resin bushing made by JEC-211 (epoxy resin bushing), but it is also a resin for improving heat resistance and mechanical strength. The breakdown voltage is lowered due to the effect of the additive mixed in, and the size of the bushing is increased to compensate for the breakdown voltage.

また、ブッシング取付部が高温になるため、ブッシング
取付部に介装するOリング等のシール材7にふっ素系ゴ
ム等の耐熱性材料を用いたり、ブッシングに接続する外
部ケーブルにも耐熱架橋ポリエチレンケーブル等の耐熱
性ケーブルを使用することが必要となり、さらにシール
材の熱劣化を考慮して、信頼性向上のためブッシング取
付部のシール材7を2重に配置する等、シール構造も複
雑となっていた。
Further, since the bushing mounting portion becomes hot, a heat-resistant material such as fluorine rubber is used for the sealing material 7 such as an O-ring interposed in the bushing mounting portion, or a heat resistant crosslinked polyethylene cable is used as an external cable connected to the bushing. It is necessary to use a heat-resistant cable such as the above, and in consideration of heat deterioration of the seal material, the seal material 7 of the bushing mounting portion is arranged in double to improve reliability, and the seal structure becomes complicated. Was there.

本発明の目的は、ブッシング等の外部引出し用付属品に
中身本体よりも許容温度の低い材料を用いて、熱的、電
気的に安定で、かつコンパクトなものとすることを可能
にし、ガス絶縁静止誘導電器の小形化と信頼性および経
済性の向上を図ることにある。
An object of the present invention is to use a material having an allowable temperature lower than that of the main body for an accessory for external drawer such as a bushing, to make it thermally and electrically stable and compact, and to provide gas insulation. The aim is to reduce the size of static induction electric appliances and improve their reliability and economy.

〔問題点を解決するための手段〕[Means for solving problems]

上記目的は、鉄心と巻線を有する変圧器の中身本体と、
この中身本体を収納するタンクと、このタンク内部空間
に封入された絶縁性冷却媒体と、タンクの側面に接続さ
れて絶縁性冷却媒体が流入する放熱器を備えた自然循環
自然冷却方式のガス絶縁静止誘導電器において、絶縁性
冷却媒体として封入されたSF6ガスと、タンクの下方に
配置された外部引出し用ブッシングを備え、巻線の下部
からリード線を引き出して外部引出し用ブッシングに接
続するとともに、運転時のタンク上部とタンク下部のガ
ス温度の差を15℃より大きく設定してタンクの下部のガ
ス温度を90℃以下としたことにより達成される。
The above object is to provide a transformer main body having an iron core and a winding,
Natural circulation natural cooling type gas insulation equipped with a tank that stores the main body of the contents, an insulating cooling medium enclosed in this tank internal space, and a radiator that is connected to the side surface of the tank and into which the insulating cooling medium flows In the static induction machine, SF 6 gas sealed as an insulating cooling medium and an external drawing bushing located below the tank are provided, and the lead wire is drawn out from the lower part of the winding and connected to the external drawing bushing. This can be achieved by setting the difference in gas temperature between the upper part of the tank and the lower part of the tank during operation to be larger than 15 ° C and keeping the gas temperature of the lower part of the tank below 90 ° C.

〔作用〕[Action]

自然循環自然冷却方式のガス絶縁静止誘導電器では、タ
ンク内のガスの対流により、運転時にタンクの上部と下
部とでガス温度の差が生じる。この温度差はガスの熱特
性、巻線の形状、冷却装置の性能その他多くの要素によ
り左右されるが、ガスの熱伝導率が比較的小さいことか
ら、油入変圧器や沸騰冷却式変圧器等に比べてタンク
上、下の温度差は大きくなる傾向がある。
In a gas-insulated static induction machine of natural circulation and natural cooling system, a gas temperature difference occurs between the upper part and the lower part of the tank during operation due to convection of gas in the tank. This temperature difference depends on the thermal characteristics of the gas, the shape of the windings, the performance of the cooling device, and many other factors, but the thermal conductivity of the gas is relatively small, so an oil-filled transformer or a boiling cooling type transformer is used. The temperature difference between the upper and lower parts of the tank tends to be larger than that of the above.

通常は、タンク上、下のガス温度の差を10〜15℃程度に
抑えるように冷却設計がなされているが、本発明では、
逆にタンク上、下のガス温度の差を比較的大きく設定し
て、タンク下部のガス温度を通常よりも低下させ、この
低温部にブッシングを配置する(中身本体の巻線冷却ダ
クトやタンク側面に接続する放熱器等のガス流路を絞っ
たり、封入ガス圧を下げることで、タンク上、下のガス
温度の差は大きくなる)。こうすることにより、ブッシ
ングには中身本体よりも耐熱区分の少なくとも1クラス
下に相当する低許容温度の材料を使用することが可能と
なる。たとえば、第2図の温度分布例に示すように、中
身本体の耐熱区分をE種とし、タンク上部h1近辺のガス
温度をE種絶縁の許容温度である120℃に設定した場
合、タンク上下のガス温度の差を40℃とする冷却設計を
行なうと、タンク下部h2近辺のガス温度は80℃となり、
ブッシングとしてはA種絶縁相当の低許容温度(90℃程
度)の一般形エポキシ樹脂ブッシング(JEC−211)を使
用できる。
Normally, on the tank, the cooling design is made so as to suppress the difference in gas temperature below 10 to 15 ° C, but in the present invention,
On the contrary, the difference in the gas temperature above and below the tank is set to a relatively large value to lower the gas temperature below the tank below the normal level, and bushings are placed in this low temperature part (the winding cooling duct of the main body and the side of the tank). By narrowing the gas flow path such as the radiator to be connected to, or reducing the enclosed gas pressure, the difference in gas temperature above and below the tank becomes large). By doing so, it is possible to use, for the bushing, a material having a low allowable temperature corresponding to at least one class lower than the heat resistance of the content body. For example, as shown in the temperature distribution example in Fig. 2, when the heat resistance classification of the main body of the contents is set to Class E, and the gas temperature near the upper part of the tank h 1 is set to 120 ° C, which is the allowable temperature for Class E insulation, When a cooling design is made so that the difference in gas temperature between the two is 40 ° C, the gas temperature near the bottom of the tank h 2 is 80 ° C.
As the bushing, a general epoxy resin bushing (JEC-211) with a low allowable temperature (about 90 ° C) equivalent to type A insulation can be used.

また、ブッシング取付部の温度低下に伴い、ブッシング
取付部のシール材やブッシングに接続する外部ケーブル
にも、中身本体より許容温度の低いもの(A種絶縁相
当)を使用できることになる。
Further, as the temperature of the bushing attachment portion decreases, it is possible to use a sealing material of the bushing attachment portion and an external cable connected to the bushing, which has a lower permissible temperature than the content body (corresponding to type A insulation).

〔実施例〕〔Example〕

以下、本発明の一実施例を第1図により説明する。 An embodiment of the present invention will be described below with reference to FIG.

巻線3、鉄心4、巻線支持絶縁物14、鉄心締金具16、締
金具・鉄心間絶縁物17からなる静止誘導電器の中身本体
2をタンク1に収納し、タンク1の内部空間には絶縁お
よび冷却媒体としてSF6ガスのような高耐圧のガス5を
封入してある。タンク1の側面には放熱器9を取付け、
これを通してタンク1内のガスを対流により循環させ
る。外部引出し用ブッシング6はシール材7を介してタ
ンク1の下部側面に取付け、巻線3の下部から引出した
リード線8をブッシング6の一端に接続してあり、ブッ
シング6の他端には図示しない外部ケーブルが接続され
る。15は巻線3に接続されたタップ切換器、18はタンク
1の下部に配置された給・排気弁である。
The main body 2 of the static induction electric device consisting of the winding wire 3, the iron core 4, the winding support insulator 14, the iron core fastening member 16, the fastening metal member-iron core insulator 17 is housed in the tank 1, and the inner space of the tank 1 is A high pressure resistant gas 5 such as SF 6 gas is enclosed as an insulating and cooling medium. A radiator 9 is attached to the side surface of the tank 1,
Through this, the gas in the tank 1 is circulated by convection. The external drawing bushing 6 is attached to the lower side surface of the tank 1 via a sealing material 7, and a lead wire 8 drawn from the lower part of the winding 3 is connected to one end of the bushing 6, and the other end of the bushing 6 is illustrated. No External cable is connected. Reference numeral 15 is a tap changer connected to the winding 3, and 18 is a supply / exhaust valve arranged in the lower portion of the tank 1.

第2図は、本実施例において、タンク上部h1付近のガス
温度を120℃、タンク下部h2付近のガス温度を80℃とす
るように冷却設計を行なった場合のタンク高さ方向の温
度分布例を示す図で、この場合、タンク下部に配置され
たブッシング6には、許容温度が90℃程度の一般形エポ
キシ樹脂ブッシングを使用することができる。一般形エ
ポキシ樹脂ブッシングは、従来のガス絶縁静止誘導電器
に使用されていた耐熱性エポキシ樹脂ブッシングに比べ
はるかに安価で経済的である。本実施例によれば、ブッ
シング6は90℃以下の比較的低温領域で使用されるた
め、許容温度が比較的低い一般形エポキシ樹脂ブッシン
グでも熱的、電気的に安定した性能が得られ、寸法精度
が良いので、シール性能の面でも問題はない。また、耐
熱性エポキシ樹脂ブッシングに比べると、耐熱性や機械
的強度向上のため樹脂に混入する添加剤の量が少なくて
よいので、添加剤による破壊電圧の低下が避けられ、ブ
ッシングの小形化、ひいてはガス絶縁静止誘導電器全体
の小形化が図れる。
FIG. 2 shows the temperature in the tank height direction when the cooling design is performed so that the gas temperature near the tank upper portion h 1 is 120 ° C. and the gas temperature near the tank lower portion h 2 is 80 ° C. in this embodiment. In the figure showing an example of distribution, in this case, a general epoxy resin bushing having an allowable temperature of about 90 ° C. can be used for the bushing 6 arranged at the bottom of the tank. The general epoxy resin bushing is much cheaper and more economical than the heat-resistant epoxy resin bushing used in the conventional gas-insulated static induction electric device. According to this embodiment, since the bushing 6 is used in a relatively low temperature range of 90 ° C. or lower, thermal and electrical stable performance can be obtained even with a general epoxy resin bushing having a relatively low allowable temperature, Since the accuracy is good, there is no problem in terms of sealing performance. Also, compared to heat-resistant epoxy resin bushings, the amount of additives mixed in the resin for improving heat resistance and mechanical strength may be small, so reduction in breakdown voltage due to additives can be avoided, and bushings can be made smaller, As a result, it is possible to reduce the size of the gas-insulated static induction generator.

タップ切換器15等の他の導電部品についても、上記ブッ
シングと同様、タンク下部に配置することにより、絶縁
材料の許容温度を下げ、一般形フエノール樹脂積層材等
の安価な材料を使用できる。
Similar to the bushing, other conductive parts such as the tap changer 15 are also arranged at the lower part of the tank, so that the allowable temperature of the insulating material can be lowered and an inexpensive material such as a general type phenol resin laminated material can be used.

中身本体2については、タンク上部温度を120℃とした
場合、巻線3にはE種絶縁を採用する必要があるが、巻
線支持絶縁物14、締金具・鉄心間絶縁物17や、巻線内部
に配置するダクトピース等の内部絶縁構造物の材料は上
部と下部で耐熱区分を分け、たとえば上部のみE種絶縁
材料を使用し、下部にはA種相当の絶縁材料を使用する
ことで材料費の低減を図ることができる。中身本体2の
耐熱区分をB種またはH種等に格上げし、封入ガス圧を
下げるなどしてタンク上、下の温度差をさらに大きくす
ると、紙本体の下部に配置する絶縁構造物には上部に配
置する絶縁構造物より耐熱区分の2クラス下の材料を使
用することも可能である。
For the main body 2 of the contents, when the tank upper temperature is 120 ° C., it is necessary to adopt the class E insulation for the winding 3, but the winding support insulator 14, the clamp / inter-core insulator 17, and the winding For the material of the internal insulation structure such as the duct piece placed inside the wire, the upper and lower parts are divided into heat-resistant sections. For example, only the upper part uses the E class insulating material and the lower part uses the A class equivalent insulating material. The material cost can be reduced. If the heat resistance classification of the main body 2 is upgraded to Class B or Class H, and the temperature difference between the upper and lower tanks is further increased by lowering the enclosed gas pressure, the insulating structure placed at the bottom of the paper body will have an upper part. It is also possible to use a material that is two classes below the heat-resistant category of the insulating structure to be placed in.

タンク取付ける部品のシール材(ガスケット)について
も、前述の内部構造絶縁物と同様、放熱器9の上側接続
部等のタンク上部の高温域に配置するものは、ふっ素ゴ
ム等のE種絶縁相当の耐熱材料を使用する必要がある
が、本来タンク下部の低温域に配置された放熱器9の下
側接続部や給・排気弁18あるいは本発明によりタンク下
部に配置されたブッシング6等のシール材については、
許容温度の比較的低いニトリルゴム等の安価な一般用材
料を使用することができる。また、ブッシング6をタン
ク下部の低温域に配置したことにより、ブッシング取付
部におけるシール材7の熱劣化の進行が遅くなり、信頼
性の向上が図れるので、シール構造も0リングを一重に
配置するだけで良くなり、構造を簡素化できる。
As for the sealing material (gasket) of the parts to be attached to the tank, as in the case of the above-mentioned internal structure insulator, those arranged in the high temperature region of the upper part of the tank such as the upper connection part of the radiator 9 are equivalent to Class E insulation such as fluororubber. Although it is necessary to use a heat-resistant material, a sealant such as the lower connection portion of the radiator 9 originally placed in the low temperature region of the lower part of the tank, the supply / exhaust valve 18 or the bushing 6 arranged in the lower part of the tank according to the present invention. about,
Inexpensive general-purpose materials such as nitrile rubber having a relatively low allowable temperature can be used. Further, since the bushing 6 is arranged in the low temperature region of the lower portion of the tank, the progress of heat deterioration of the seal material 7 at the bushing mounting portion is delayed and the reliability can be improved. Therefore, the seal structure is also provided with a single O-ring. It will be good and the structure can be simplified.

第3図〜第10図は本発明の他の実施例を示す。3 to 10 show another embodiment of the present invention.

第3図の実施例は、タンク1の下部側面に水平円筒状の
ブッシング収納ポケット12を設け、該収納ポケット12の
先端部にブッシング6を取付けたものであり、このよう
なタンク下部と連通するブッシング収納ポケット付構造
とすることにより、ブッシング取付部のガス温度はポケ
ット部の放射冷却によってタンク内のガス温度よりも低
くなり、その結果、第1図の実施例よりブッシング取付
部の温度を下げることができる。
In the embodiment of FIG. 3, a horizontal cylindrical bushing storage pocket 12 is provided on the lower side surface of the tank 1, and a bushing 6 is attached to the tip of the storage pocket 12 so as to communicate with the lower portion of the tank. By adopting the structure with the bushing storage pocket, the gas temperature of the bushing mounting portion becomes lower than the gas temperature in the tank due to the radiation cooling of the pocket portion, and as a result, the temperature of the bushing mounting portion is lowered as compared with the embodiment of FIG. be able to.

第4図の実施例は、第3図の実施例におけるブッシング
収納ポケット12に放熱フィン13を付加したもので、ブッ
シング取付部の温度をさらに低下させる効果がある。
In the embodiment shown in FIG. 4, a radiation fin 13 is added to the bushing storage pocket 12 in the embodiment shown in FIG. 3, and it has the effect of further reducing the temperature of the bushing mounting portion.

第5図の実施例は、ブッシング収納ポケット12にブッシ
ング6を上向きに取付ける場合、タンク1の側面に沿っ
たブッシング収納ポケット12の内壁部に断熱材20を貼付
けることにより、タンク側面からの熱伝導の影響を抑
え、ブッシング収納ポケット12内のガス温度をタンク1
の最下部の温度に近付けることを狙ったものである。
In the embodiment shown in FIG. 5, when the bushing 6 is mounted upward in the bushing storage pocket 12, heat insulation from the side surface of the tank is achieved by attaching the heat insulating material 20 to the inner wall portion of the bushing storage pocket 12 along the side surface of the tank 1. Suppresses the influence of conduction and keeps the gas temperature in the bushing storage pocket 12 in the tank 1.
It is aimed at approaching the temperature at the bottom of.

第6図の実施例は、ブッシング6をブッシング収納ポケ
ット12のタンク1底部よりも低い位置に下向きに取付
け、ブッシング取付部を最低ガス温度部とするととも
に、ブッシング6を床下ピット21に挿入し、ピット内ケ
ーブルとの配線作業を容易にしている。
In the embodiment of FIG. 6, the bushing 6 is attached downward at a position lower than the bottom of the tank 1 of the bushing storage pocket 12, the bushing attachment portion is set to the lowest gas temperature portion, and the bushing 6 is inserted into the underfloor pit 21, Wiring work with the cable in the pit is easy.

第7図の実施例は、第1図の実施例における中身本体2
を台19により持ち上げ、タンク1の下部側面に取付けた
ブッシング6を高さを相対的に低くしたもので、これに
よってもブッシング取付部のガス温度を下げる効果があ
る。
The embodiment shown in FIG. 7 corresponds to the content main body 2 in the embodiment shown in FIG.
The height of the bushing 6 mounted on the lower side surface of the tank 1 is relatively lowered by raising the table 19 by the base 19, and this also has the effect of lowering the gas temperature of the bushing mounting portion.

第8図の実施例は、第1図の実施例におけるブッシング
6に加えて、中継ブッシング10をタンク1の上部側面に
ステー22で取付け、ブッシング6との間を中継ケーブル
11で接続したもので、この方式は、タンク1の上方から
外部ケーブルを引込む場合、ケーブル配線作業を容易に
する利点がある。ここで使用する中継ブッシング10は、
耐熱性やシール性を必要としない安価な気中ブッシング
でよい。
In the embodiment shown in FIG. 8, in addition to the bushing 6 in the embodiment shown in FIG. 1, a relay bushing 10 is attached to the upper side surface of the tank 1 with a stay 22, and a relay cable is provided between the bushing 6 and the bushing 6.
This method has the advantage of facilitating the cable wiring work when the external cable is drawn from above the tank 1. The relay bushing 10 used here is
Inexpensive aerial bushings that do not require heat resistance or sealing properties may be used.

第9図の実施例は、L字形のブッシング収納ポケット12
をタンク1の下部側面に取付け、ブッシング6をタンク
1の上面と同一高さに配置して、第8図の実施例と同じ
く外部ケーブルの配線作業を容易にしたもので、ブッシ
ング取付部のガス温度はタンク下部のガス温度とほぼ同
等に保たれる。
The embodiment shown in FIG. 9 has an L-shaped bushing storage pocket 12
Is mounted on the lower side surface of the tank 1 and the bushing 6 is arranged at the same height as the upper surface of the tank 1 to facilitate the wiring work of the external cable as in the embodiment of FIG. The temperature is kept almost the same as the gas temperature at the bottom of the tank.

第10図の実施例は、従来、タンク上部に配置していたブ
ッシング6を、本発明によりタンク下部に移した跡のス
ペースに放熱フィン23を設けたものである。放熱効果は
高温部ほど高くなることは通常知られている現象であ
り、特にガス絶縁静止誘導電器においては、冷却効果全
体に占める放射冷却の割合が大きいので、タンク上部に
放熱フィン23を設けることにより、タンク上下の温度差
が大きくなりすぎ、不経済設計とならないよう、上下の
温度差を圧縮できる効果がある。
In the embodiment shown in FIG. 10, the radiating fins 23 are provided in the space left by moving the bushing 6 which has been conventionally arranged on the upper portion of the tank to the lower portion of the tank according to the present invention. It is a generally known phenomenon that the heat radiation effect becomes higher at higher temperature parts.In particular, in a gas-insulated static induction electric generator, since the ratio of radiative cooling to the entire cooling effect is large, the heat radiation fin 23 should be provided at the upper part of the tank. As a result, there is an effect that the temperature difference between the upper and lower sides of the tank is compressed so that the temperature difference between the upper and lower sides of the tank does not become too large and the design becomes uneconomical.

〔発明の効果〕〔The invention's effect〕

本発明によれば、運転時、ガス温度の比較的低いタンク
下部またはタンク下部に連通するブッシング収納ポケッ
トに外部引出し用ブッシングを配置したため、中身本体
の耐熱区分をE種とした場合でも、ブッシングには従来
のように中身本体の耐熱区分に合わせた高価な耐熱性エ
ポキシ樹脂ブッシングを用いる必要がなく、中身本体よ
りも許容温度の低いA種絶縁相当の一般形エポキシ樹脂
ブッシング等の安価なものを使用でき、また耐熱性や機
械的強度の向上のため樹脂に混入する添加剤の量が少な
くてよいので、添加剤による破壊電圧の低下が避けら
れ、ブッシングの小形化が可能となり、また使用温度の
低下によりクラックが生じにくくなり、ブッシングの熱
的、電器的な安定性、耐久性が向上する。さらに、ブッ
シング取付部の温度低下に伴いブッシング取付部のシー
ル材にも許容温度の低い安価な材料を使用でき、材料の
熱劣化を考慮して従来2重に配置していたシール材を1
重配置としてブッシング取付部を小形簡単化したり、ブ
ッシングに接続する外部ケーブルにも従来使用されてい
た耐熱性架橋ポリエチレンケーブルの代わりに一般雰囲
気用の架橋ポリエチレンケーブルを使用できる等、ガス
絶縁静止誘導電器全体のコンパクト化、信頼性および経
済性の向上を図ることができる。
According to the present invention, since the external drawer bushing is arranged in the lower portion of the tank where the gas temperature is relatively low or the bushing storage pocket communicating with the lower portion of the tank during operation, even if the heat-resistant category of the main body of the content is E type, Does not require the use of expensive heat-resistant epoxy resin bushings that match the heat resistance classification of the main body as in the past, but uses inexpensive epoxy such as general epoxy resin bushings that have a lower allowable temperature than the main body and are equivalent to Class A insulation. It can be used, and because the amount of additives mixed in the resin can be small to improve heat resistance and mechanical strength, it is possible to avoid lowering the breakdown voltage due to the additives, and it is possible to downsize the bushing. As a result, cracks are less likely to occur, and thermal and electrical stability and durability of the bushing are improved. Furthermore, as the temperature of the bushing attachment portion decreases, an inexpensive material with a low allowable temperature can be used as the sealing material of the bushing attachment portion.
Gas-insulated static induction equipment, such as the simplified arrangement of the bushing attachment part as a double arrangement, and the use of a cross-linked polyethylene cable for general atmosphere instead of the heat-resistant cross-linked polyethylene cable that was conventionally used for the external cable connected to the bushing. Overall compactness, reliability and economic efficiency can be improved.

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

第1図は本発明の一実施例の側断面図、第2図はタンク
高さ方向の温度分布の一例を示す図、第3図〜第10図は
本発明の他の実施例の側断面図、第11図、第12図は従来
例の側断面図である。 1:タンク、2:中身本体、5:ガス、6:外部引出し用ブッシ
ング、12:ブッシング収納ポケット。
FIG. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is a diagram showing an example of temperature distribution in the tank height direction, and FIGS. 3 to 10 are side sectional views of another embodiment of the present invention. FIG. 11, FIG. 11 and FIG. 12 are side sectional views of a conventional example. 1: Tank, 2: Main body, 5: Gas, 6: Bushing for external drawer, 12: Bushing storage pocket.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】鉄心と巻線を有する変圧器の中身本体と、
この中身本体を収納するタンクと、このタンク内部空間
に封入された絶縁性冷却媒体と、上記タンクの側面に接
続されて上記絶縁性冷却媒体が流入する放熱器を備えた
自然循環自然冷却方式のガス絶縁静止誘導電器におい
て、上記絶縁性冷却媒体として封入されたSF6ガスと、
上記タンクの下方に配置された外部引出し用ブッシング
を備え、上記巻線の下部からリード線を引き出して上記
外部引出し用ブッシングに接続するとともに、運転時の
上記タンクの上部と下部のガス温度の差を15℃より大き
く設定して上記タンクの下部のガス温度を90℃以下とし
たことを特徴とするガス絶縁静止誘導電器。
1. A transformer main body having an iron core and a winding,
A natural circulation natural cooling system including a tank that stores the main body of the contents, an insulating cooling medium that is enclosed in the internal space of the tank, and a radiator that is connected to the side surface of the tank and into which the insulating cooling medium flows. In a gas-insulated static induction machine, SF 6 gas enclosed as the insulating cooling medium,
An external withdrawing bushing disposed below the tank is provided, and a lead wire is pulled out from the lower portion of the winding to be connected to the external withdrawing bushing, and a difference in gas temperature between the upper and lower portions of the tank during operation is provided. Is set to be higher than 15 ° C and the gas temperature in the lower part of the tank is set to 90 ° C or lower.
JP61294803A 1986-12-12 1986-12-12 Gas insulated static induction Expired - Lifetime JPH0799726B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61294803A JPH0799726B2 (en) 1986-12-12 1986-12-12 Gas insulated static induction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61294803A JPH0799726B2 (en) 1986-12-12 1986-12-12 Gas insulated static induction

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP8244460A Division JP2713293B2 (en) 1996-09-17 1996-09-17 Gas insulated stationary induction device

Publications (2)

Publication Number Publication Date
JPS63148605A JPS63148605A (en) 1988-06-21
JPH0799726B2 true JPH0799726B2 (en) 1995-10-25

Family

ID=17812466

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61294803A Expired - Lifetime JPH0799726B2 (en) 1986-12-12 1986-12-12 Gas insulated static induction

Country Status (1)

Country Link
JP (1) JPH0799726B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02254705A (en) * 1989-03-29 1990-10-15 Toshiba Corp Gas-insulated transformer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4214493Y1 (en) * 1964-03-03 1967-08-18
JPS4934650U (en) * 1972-06-30 1974-03-27

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59185813U (en) * 1983-05-26 1984-12-10 富士電機株式会社 Self-cooled gas insulated transformer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4214493Y1 (en) * 1964-03-03 1967-08-18
JPS4934650U (en) * 1972-06-30 1974-03-27

Also Published As

Publication number Publication date
JPS63148605A (en) 1988-06-21

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