JP3713172B2

JP3713172B2 - Static induction machine

Info

Publication number: JP3713172B2
Application number: JP34334299A
Authority: JP
Inventors: 良夫浜館; 達斎藤; 悦紀森; 勝柏倉; 利幸宮▲崎▼
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 1999-12-02
Filing date: 1999-12-02
Publication date: 2005-11-02
Anticipated expiration: 2019-12-02
Also published as: JP2001160511A

Description

【０００１】
【発明の属する技術分野】
本発明は変圧器やリアクトルの如き静止誘導電器に係り、特に下部鉄心締付金具での冷却構造を改良した静止誘導電器に関するものである。
【従来の技術】
【０００２】
一般に変圧器やリアクトルなどの静止誘導電器においては、容量増加にともない巻線から発生する漏れ磁束も増大し、特に巻線の近くに位置される鉄心締付金具では巻線からの漏れ磁束に起因する損失の増加と局部的な温度上昇が問題となっている。
【０００３】
従来は鉄心締付金具での損失を低減するためにシールドを配置したり、鉄心締付金具を箱型構造にして、絶縁油を流して局部的な温度上昇を抑制する方法がある。以上の方法のうち後者における冷却方式は大容量の静止誘導電器に多く採用されている。
【０００４】
しかしながら、絶縁油を流す方法は鉄心締付金具を鋼板で箱型構造にしているため、巻線からの漏れ磁束が鉄心締付金具に侵入して損失が増加すると共に、局部過熱を生ずる欠点があった。
【０００５】
これに対して、下部鉄心締付金具で発生する損失を低減する構造と冷却方式が特開昭５５−１５３３０３号公報、特開昭５９−１２１９０４号公報でそれぞれ提案されている。特開昭５５−１５３３０３号公報は巻線及び鉄心の冷却ダクトへ連通される油室を設け、この油室の上面板部材を絶縁物により構成したものであるが、下部鉄心締付金具の長手方向に油室を形成するため、作業工数と製作コストが増加する傾向にある。しかも、冷却器より送油された絶縁油は下部鉄心締付金具を冷却するため、絶縁油の温度が上昇して巻線や鉄心を効率良く冷却できない面がある。
【０００６】
一方、特開昭５９−１２１９０４号公報は、変圧器本体を構成する巻線及び鉄心を効率良く冷却するために下部鉄心締付金具に油室を設け、その油室の長手方向端部の一方側に共通油導からの送油管を連結し、反対側端部に油量調整弁を介して油量配分を精度良く調整するものであるが、下部鉄心締付金具が鋼板で箱型構造であるため、巻線からの漏れ磁束が侵入して損失が増加すると共に、局部過熱を防止するには不十分である。
【０００７】
【発明が解決しようとする課題】
上記従来技術においては、巻線からの漏れ磁束が浸入して損失が増加すると共に、変圧器の下部鉄心締付金具で局部過熱を生じ絶縁油が温められて冷却効率が悪いと云う課題があった。
【０００８】
本発明の目的は、巻線からの漏れ磁束が侵入して損失が増加したり、下部鉄心締付金具での局部過熱の生ずる部分を少なくすると共に、冷却効率を良くした静止誘導電器を提供することにある。
【課題を解決するための手段】
【０００９】
上記目的を達成するために、本発明は、鉄心と、該鉄心に巻回された巻線と、該巻線の上部及び下部で上記鉄心を両側から締付ける鉄心締付金具とから成る変圧器本体をタンク内に収納し、上記タンクと冷却器との間で冷却媒体を循環させて冷却する静止誘導電器において、上記両側の下部鉄心締付金具に、上記巻線の下部に対向して開口する貫通穴を有する独立した油室を上記巻線の下部に対向した範囲内の大きさに夫々形成し、かつ、該油室に上記冷却媒体を供給するように構成したことを特徴とする。
【００１０】
【発明の実施の形態】
以下、本発明の一実施例を図面を参照して説明する。図１，２及び３は本発明の一実施例である送油式の３相５脚変圧器の一実施例を示すものである。図１，２，３において、３相５脚変圧器は、主脚１と側脚２との間を下部継鉄４で連結し、主脚１及び側脚２に巻線５を挿入した後、主脚１と側脚２との間を上部継鉄３で連結する。巻線５の両側間を上部鉄心締付金具６及び下部鉄心締付金具７で締付けて変圧器本体を形成し、この変圧器本体をタンク１０内に収納して構成している。
【００１１】
また、主脚１及び巻線５を冷却する下部鉄心締付金具７は、上面部材７Ａ及び下面部材７Ｄと側面部材７Ｂ，７Ｃとから箱型に構成されて冷却通路を形成している。この冷却通路は、各巻線５毎に仕切板７Ｚを設けて独立した油室２０を形成した構造となっている。油室２０は、各相の巻線５両側に配置した下部鉄心締付金具７に巻線毎に形成され、更に下部鉄心締付金具７の外側には外部油導配管１１を取付け、この外部油導配管１１に冷却器３０と連通する送油配管１２を接続している。外部油導配管１１には各相の油室２０に連通する貫通穴２５を設けている。油室２０の下部鉄心締付金具７の上面部材７Ａには、巻線５の下部に対向して開口する貫通穴２５Ａを設けている。
【００１２】
タンク１０の側方には、上下端部に油ポンプ（図示せず）を備えた冷却器３０が配置され、この冷却器３０に共通配管１５が連通され、共通配管１５に送油配管１２が接続されている。油室２０は、入口が油ポンプ（図示せず）に接続され、出口が主脚１及び巻線５の冷却ダクト（図示せず）に連通されている。そして、本実施例では下部鉄心締付金具７の上面部材７Ａと側面部材７Ｂを絶縁物で構成している。絶縁物としてはプレスボード、強化木等を使用する。
【００１３】
この構成によれば、下部鉄心締付金具７の上面部材７Ａと側面部材７Ｂが絶縁物で構成されているために、巻線５からの漏れ磁束（図示せず）が下部鉄心締付金具７に侵入しても、その部分で損失が増加したり局部過熱の生ずる部分が少なくなり、この少なくなった分だけ油室２０の絶縁油２２が暖められなくなり、変圧器の冷却効率が向上し、変圧器の耐用性つまり耐用年数も向上をした。
【００１４】
また、主脚１及び巻線５を冷却するために外部油導配管１１は上面部材７Ａと側面部材７Ｂとの間に取り付けるだけでよいから、従来のように特殊な配管を必要とせず、汎用配管を使用できる。これにより、配管手配が容易になり、作業効率が向上する。更に下部鉄心締付金具７の各巻線毎に形成された油室２０へ外部油導配管１１の一部から矢印で示すように、絶縁油２２を流すために貫通穴２５を設けるだけでよいので、作業工数が減り、安価に製作できる。
【００１５】
又、絶縁油２２は巻線５及び鉄心から離れた位置に設けられた外部油導配管１１から油室２０に供給されるので、絶縁油２２が暖められにくくなり冷却効率が良くなった。更に、外部油導配管１１は、巻線５及び側面部材７Ｂよりタンク１０側に接近しているので、巻線５からの漏れ磁束（図示せず）の浸入が小さくなり、損失を小さくできるメリットもある。
【００１６】
外部油導配管１１の材質は、下部鉄心締付金具７として通常使用される鋼板でよく、しかも市販されているような汎用の角パイプを用いることにより、安価に製作することが可能となる。更に、外部油導配管１１の材質を、鋼板から珪素鋼板とすることにより、より一層の低損失化が図れる。
【００１７】
ところで、図１に示す如く、冷却器３０からの絶縁油２２は共通配管１５で左右に分流される。一方側つまり左側の送油配管１２を介して外部油導配管１１から巻線５に流れ、右側の送油配管１２を介して外部油導配管１１から巻線５に流れる。このように一方側の外部油導配管１１と他方側の外部油導配管１１とを別々に配置すれば、配管組立時に互いに邪魔にならず、配管組立作業がやりやすくなり、作業能率を向上できる。
【００１８】
図４は本発明の他の実施例を示したもので、図３と同一部分については同一符号を付してその説明を省略する。図４から分かるように、本実施例では下部鉄心締付金具７の鉄心側の側面部材７Ｃに磁気シャント５０を設けた構成となっている。
【００１９】
かかる構成によれば、巻線５からの漏れ磁束（図示せず）が下部鉄心締付金具７の側面部材７Ｃに侵入しようとしても、磁気シャント５０で効果的に吸引されるため、下部鉄心締付金具７での損失低減を図ると共に、局部過熱を防止できるので、変圧器の耐用性及び効率を向上できる。磁気シャント５０の材質は透磁率の大きな珪素鋼板等を積層したものを用いるのが有効である。しかも、油ポンプ（図示せず）で冷却された絶縁油２２が、矢印で示す如く外部油導配管１１、下部鉄心締付金具７に設けた油室２０を経由して主脚１及び巻線５へ流れていくため、油室２０で磁気シャント５０が冷却されることになり、磁気シャント５０の局部過熱も防止することが可能で、信頼性の高い静止誘導電器を提供できる。
【００２０】
図５は本発明の更に他の実施例を示したもので、図４と同一部分については同一符号を付してその説明を省略する。図５から分かるように、本実施例では下部鉄心締付金具７の一部に設けられた外部油導配管１１を丸パイプにし、下部鉄心締付金具７の鉄心側の側面部材７Ｃに磁気シャント５０をタンク１０の長手方向（紙面垂直方向）に配置した構成となっている。
【００２１】
かかる構成によれば、巻線５からの漏れ磁束（図示せず）が下部鉄心締付金具７の側面部材７Ｃに侵入しようとしても、磁気シャント５０で効果的に吸引されるため、下部鉄心締付金具７での損失低減を図ると共に、局部過熱を防止できるので、変圧器の耐用性及び効率を向上できる。また、外部油導配管１１の材質は、下部鉄心締付金具７で通常使用される鋼板でよく、しかも市販されているような丸パイプを用いることにより、安価にすることが可能となる。
【００２２】
また、下部鉄心締付金具７と連通する外部油導配管１１に丸パイプを使用し、丸パイプを巻線から引出されるリード線と他の電気機器に接続するのに利用してもよい。この場合、丸パイプは他の電気導体と接続する箇所に絶縁手段を施すか，丸パイプを絶縁物で構成するか、或いは絶縁物で被覆する必要がある。
【００２３】
図６，７は本発明の更に他の実施例を示したものである。図１，３と同一部分については同符号を付してその説明を省略する。図６，７から分かるように、本実施例では絶縁油２２は矢印で示す如く、冷却器３０より共通配管１５、送油配管１２を経由して１本の外部油導配管１１から下部鉄心締付金具７へ流れ込むような構造となっている。また、外部油導配管１１を経由して下部鉄心締付金具７へ流れ込んだ絶縁油２２は、矢印で示す如く、一方側は図の右側の巻線５に流入し、他方側は下部鉄心締付金具７の下面部材７Ｄの一部に設けられた貫通穴２５Ｂを経由して下方に分流し、コア台３５によって形成される下部冷却路３５Cを経由し、反対側の下部鉄心締付金具７の下面部材７Ｄの一部に設けた貫通穴２５Ｂを経由して上方に分流し、図の左側の巻線５と下部鉄心締付金具７を冷却するような構成となっている。また主脚１を構成している積層鉄心板間に矢印で図示したように、絶縁油２２を通過させる間隙を適宜に形成している。また１０Ａはタンク底板である。
【００２４】
即ち、本実施例では、下部鉄心締付金具７の側面部材７Ｃと、その上，下端部に設けた巻線側に延びる上面部材７Ａ及び下面部材７Ｄとによって囲まれた空間を形成し、この空間を所定間隔をもって仕切板７Ｚで塞ぎ、巻線５と連通する貫通穴２５Ａを有する油室２０を形成し、油室２０の外側に冷却器３０と連通する外部油導配管１１を取付けている。各相の主脚１を支持し、且つ巻線５の一方側と他方側とに配置された下部鉄心締付金具７の下部に所定間隔に取り付けられたコア台３５と、巻線５と主脚1及びそれに対応するタンク底板１０Ａとによって下部油通路３５Ｃを形成し、冷却器３０及び外部油導配管１１からの絶縁油２２を右側の油室２０から巻線５と下部油通路３５Ｃに分流し、左側の油室２０に供給し、巻線５を冷却するようにしている。
【００２５】
このような本実施例の構成によれば、冷却器３０より共通配管１５、送油配管１２を経由して１本の外部油導配管１１から下部鉄心締付金具７へ絶縁油２２が流れ込むような構造としているため、図１の送油配管１２を１本少なくできるので、安価の静止誘導電器を提供できる。また、外部油導配管１１から油室２０に流し込んだ絶縁油２２を反対側の油室２０へ流す下部油通路３５Ｃを設けることで、専用の油導配管を設ける必要がなくなり、直接主脚1及び巻線５の下側の冷却が可能となるため、効率良い冷却ができる。
【００２６】
即ち、主脚1及び巻線５の下側は、常に下部油通路３５Ｃ内の絶縁油２２により冷却されるので、冷却効率を向上させることが出来る。
【００２７】
図８，９は本発明の更に他の実施例を示したものである。図６，７と同一部分については同一符号を付してその説明を省略する。図８，９から分かるように、本実施例では外部油導配管をなくして、冷却器３０より共通配管１５、送油配管１２を経由して下部鉄心締付金具７の油室２０へ矢印で示す如く絶縁油２２を流す構成となっている。
【００２８】
かかる構成によれば、冷却器３０より共通配管１５、送油配管１２を経由して直接、下部鉄心締付金具７に設けられた油室２０へ絶縁油２２を流すので、構造が簡単になると共に、外部油導配管を省略でき安価で信頼性の高い静止誘導電器を提供できる。
【００２９】
図１０，１１は本発明の更に他の実施例を示したものである。図８，９と同一部分については同一符号を付してその説明を省略する。図１０，１１から分かるように本実施例では外部油導配管をなくして、変圧器本体の両側に配置された冷却器３０より共通配管１５、送油配管１２を経由して、下部鉄心締付金具７に設けられた油室２０へ矢印で示す如く絶縁油２２を流す構成となっている。
【００３０】
かかる構成によれば、冷却器３０で冷却された絶縁油２２は矢印で示す如く、両側より共通配管１５、送油配管１２を経由して、下部鉄心締付金具７で構成された油室２０へ流れるため、冷却効率が向上した静止誘導電器を提供できる。
【００３１】
また各相の巻線５の長手方向と直角な左右側面に冷却器３０を分散して配置しているので、各相の巻線５の長手方向が長くならないと共に、各冷却器３０を一列に配置した場合に比べて、間隔幅が広くなり、作業がし易くなる。
【００３２】
図１２は本発明の更に他の実施例を示すものである。図１０と同一部分については同一符号を付してその説明を省略する。図１２から分かるように本実施例では鉄心を形成する側脚２と対向する両サイド側に冷却器３０と共通配管１５、送油配管１２を配置して、外部油導配管１１と下部鉄心締付金具７で形成された油室２０へ矢印で示す如く絶縁油２２を流す構造となっている。
【００３３】
この構成によれば、冷却器３０をタンク１０の両サイド側に配置することにより、図１の送油配管１２及び共通配管１５に比べて、この実施例の送油配管１２及び共通配管１５の長さを大幅に短縮できるので、絶縁油１１が暖まりにくくなり、冷却効率が良くなる。また送油配管１２及び共通配管１５の長さを大幅に短縮して機械的強度を増したので、変圧器の磁気振動により、送油配管１２及び共通配管１５の振動量が少なくなり、接続個所での絶縁油漏が漏れる恐れが少なくなる。
【００３４】
また冷却器３０から主脚１及び巻線５を冷却するための送油配管１２の本数を低減できるため、組立工数が減り、作業効率を上げることができる。
【００３５】
以上のべた各種の実施例において、鉄心締付金具７は通常使用される鋼板と絶縁物で構成された場合を例に述べているが、すべてを絶縁物とした場合でも同様な効果が期待できるのは言うまでもない。
【００３６】
更に、上述の図１０と同様に一方側の共通配管１５及び冷却器３０と他方側に共通配管１５及び冷却器３０とを別々に配置しているので、配管及び冷却器の組立時に互いに邪魔にならず、冷却器及び配管を直ぐに見ることができるので、付け忘れや、組立間違いを防止でき、作業員が安心して作業ができると共に、組立作業の能率を向上させることができる。
【００３７】
図１３は本発明の更に他の実施例を示したものである。図１２と同一部分については同一符号を付してその説明を省略する。図１３から分かるように、本実施例では冷却器３０から共通配管１５、送油配管１２を経由して、２本の外部油導配管１１が接続され、外部油導配管１１と下部鉄心締付金具７で油室２０が形成された構造となっている。
【００３８】
かかる構成によれば、２本の外部油導配管１１が接続されているため、冷却器３０及び共通配管１５から流れてきた絶縁油２２を主脚１及び巻線５に効率良く流することができ、主脚１及び巻線５の冷却効率を良くすることができる。
【００３９】
図１４は本発明の更に他の実施例を示すものである。図１４から分かるように、本実施例では絶縁油２２は矢印で示す如く、２台の冷却器３０、共通配管１５、送油配管１２を経由して油室２０へ流れ、その後下部鉄心締付金具７の下面部材（図示せず）の一部に設けられた貫通穴（図示せず）、コア台（図示せず）を経由して反対側の下部鉄心締付金具７の下面部材（図示せず）の一部に設けられた穴（図示せず）から油室２０、巻線５へ流すような構造となっている。
【００４０】
かかる構成によれば、絶縁油２２は矢印で示す如く、冷却器３０から共通配管１５、送油配管１２を経由して下部鉄心締付金具７に設けられた油室２０へ流れ、その後下部鉄心締付金具７の下面部材（図示せず）の一部に設けられた貫通穴（図示せず）、コア台（図示せず）を経由して反対側の下部鉄心締付金具の下面部材（図示せず）に流れるような構造となっているため、冷却効率を向上し信頼性の高い静止誘導電器を提供することができる。
【００４１】
図１５は本発明の更に他の実施例を示すものである。図１５から分かるように、本実施例では冷却器３０、共通配管１５、送油配管１２を経由し、下部鉄心締付金具７に設けられた油室２０へ矢印で示す如く絶縁油２２が流れる構造となっている。
【００４２】
かかる構成によれば、絶縁油２２は矢印で示す如く、２台の冷却器３０から共通配管１５、２本の送油配管１２を経由して下部鉄心締付金具７に設けられた油室２０へ流れ、その後下部鉄心締付金具の下面部材（図示せず）、コア台（図示せず）を経由して、反対側の下部鉄心締付金具の下面部材（図示せず）から油室２０に流れるような構造となっているため、主脚１及び巻線５での冷却効率が向上した静止誘導電器を提供することができる。
【００４３】
図１６は本発明の更に他の実施例を示すものである。図１６から分かるように、本実施例では冷却器３０、共通配管１５、送油配管１２を経由して下部鉄心締付金具７に設けられた油室２０で冷却流路が形成される構造となっている。
【００４４】
かかる構成によれば、絶縁油２２は矢印で示す如く、２台の冷却器３０から共通配管１５、２本の送油配管１２を経由して下部鉄心締付金具７に設けられた油室２０へ流れ、その後下部鉄心締付金具の下面部材（図示せず）、コア台（図示せず）を経由して、反対側の下部鉄心締付金具の下面部材（図示せず）に流れるような構造となっているため、主脚１及び巻線５での冷却効率が向上し、変圧器本体の局部過熱を防止すると共に、信頼性の高い静止誘導電器を提供することができる。
【００４５】
尚、本実施例では、変圧器絶縁油の他に、ＳＦ６ガスやパーフロロカーボン液等の冷却媒体を使用しても上述と同様な効果が期待できるのは言うまでもない。
【発明の効果】
以上のように、本発明によれば、巻線からの漏れ磁束が侵入して損失が増加したり、局部過熱の生ずる部分を少なくすると共に、冷却効率が向上する効果がある。
【図面の簡単な説明】
【図１】本発明の静止誘導電器の実施例で３相５脚変圧器の下部鉄心締付金具の冷却構成を示す平面図。
【図２】図１の正面図。
【図３】図１の側面図。
【図４】本発明の静止誘導電器の他の実施例で下部鉄心締付金具の冷却構成を示す拡大側面図。
【図５】本発明の静止誘導電器の更に他の実施例で図４に相当する図。
【図６】本発明の静止誘導電器の更に他の実施例で図１に相当する図。
【図７】図６の下部鉄心締付金具の冷却構成を示す拡大側面図。
【図８】本発明の静止誘導電器の更に他の実施例で図１に相当する図。
【図９】図８の下部鉄心締付金具の冷却構成を示す拡大側面図。
【図１０】本発明の静止誘導電器の更に他の実施例で図１に相当する図。
【図１１】図１０の下部鉄心締付金具の冷却構成を示す拡大側面図。
【図１２】本発明の静止誘導電器の更に他の実施例で図１に相当する図。
【図１３】本発明の静止誘導電器の更に他の実施例で図１に相当する図。
【図１４】本発明の静止誘導電器の更に他の実施例で単相セレタコア変圧器の下部鉄心締付金具の冷却構成を示す平面図。
【図１５】本発明の静止誘導電器の更に他の実施例で単相２脚変圧器の下部鉄心締付金具の冷却構成を示す平面図。
【図１６】本発明の静止誘導電器の更に他の実施例で単相４脚変圧器の下部鉄心締付金具の冷却構成を示す平面図。
【符号の説明】
１…主脚、２…側脚、３…上部継鉄、４…下部継鉄、５…巻線、６…上部鉄心締付金具、７…下部鉄心締付金具、７Ａ…上面部材、７Ｂ，７Ｃ…側面部材、７Ｄ…下面部材、１０…タンク、１１…外側油導配管、１２…送油配管、１５…共通配管、２０…油室、２２…絶縁油、２５，２５Ａ，２５Ｂ…貫通穴、３０…冷却器、３５…コア台、５０…磁気シャント。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a static induction electric device such as a transformer or a reactor, and more particularly to a static induction electric device having an improved cooling structure with a lower iron core clamp.
[Prior art]
[0002]
In general, in static induction appliances such as transformers and reactors, the leakage magnetic flux generated from the winding increases as the capacity increases. In particular, in iron core clamps located near the winding, the leakage magnetic flux from the winding causes Increased loss and local temperature rise are problems.
[0003]
Conventional or place a shield in order to reduce losses in the iron core fastening bracket, and the bracket with core clamping a box-type structure, it is to that way inhibit local temperature rise by flowing insulating oil. Of the above methods, the latter cooling method is often used in large capacity static induction appliances.
[0004]
However, in the method of flowing the insulating oil, since the iron core fastener is made of a steel plate and has a box structure, the leakage magnetic flux from the winding enters the iron core fastener, increasing the loss and causing local overheating. there were.
[0005]
On the other hand, a structure and a cooling method for reducing the loss generated in the lower iron core fastener are proposed in Japanese Patent Laid-Open Nos. 55-153303 and 59-121904, respectively. JP 55- one hundred fifty-three thousand three hundred and three Patent Publication No. provided an oil chamber in communication with the winding and core cooling ducts, but the upper plate member of the oil chamber is obtained constituted by an insulator, longitudinal fitting with the lower core-clamping for that form the oil chamber in the direction, tend to work man-hour and manufacturing cost increases. In addition , since the insulating oil fed from the cooler cools the lower iron core clamp, there is a problem that the temperature of the insulating oil rises and the winding and iron core cannot be cooled efficiently.
[0006]
Meanwhile, JP 59-121904 discloses is provided with a fluid chamber in fitting with the lower core fastening to the winding and cooling efficiently core constituting the transformer body, one longitudinal end of the oil chamber concatenates the oil feed pipe from the common oil guide on the side, opposite side is the amount of oil distributed through the oil amount adjusting valve to the end is to accurately adjust, box-shaped steel plate is metal with lower iron core fastening structure Therefore, the leakage magnetic flux from the winding enters and the loss increases, and it is insufficient to prevent local overheating.
[0007]
[Problems to be solved by the invention]
In the above-mentioned prior art, the problem referred to with loss leakage flux enters from the winding is increased, the local overheat in the bracket with the lower core clamping transformer warmed raw Ji insulation oil cooling efficiency is poor was there.
[0008]
An object of the present invention is to provide a static induction electric appliance in which a leakage magnetic flux from a winding enters and loss is increased or a portion where local overheating occurs in a lower core fastening metal fitting is reduced and cooling efficiency is improved. There is.
[Means for Solving the Problems]
[0009]
In order to achieve the above object, the present invention provides a transformer body comprising an iron core, a winding wound around the iron core, and an iron core fastening bracket for fastening the iron core from both sides at the upper and lower portions of the winding. In a static induction device that cools by circulating a cooling medium between the tank and the cooler, the lower iron core clamps on both sides are opened facing the lower part of the winding. An independent oil chamber having a through hole is formed in a size within a range facing the lower portion of the winding, and the cooling medium is supplied to the oil chamber.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a description will be given of an embodiment of the present invention with reference to the drawings. 1, 2 and 3 shows one embodiment of a 3-phase 5-legged transformer Okuaburashiki according to an embodiment of the present invention. In FIG. 1, 2, 3-phase 5-legged transformer connected between the main leg 1 and the side leg 2 in the lower yoke 4, after inserting the main landing gear 1 and the side legs 2 second winding 5 The upper leg 3 is connected between the main leg 1 and the side leg 2. Tighten between both sides of the winding 5 in the upper core clamping bracket 6 and the lower core fastening bracket 7 forming the transformers body, are constituted by housing the transformer body in the tank 10.
[0011]
Further, the lower iron core fastening bracket 7 for cooling the main leg 1 and the winding 5 is formed in a box shape from the upper surface member 7A, the lower surface member 7D, and the side surface members 7B and 7C to form a cooling passage. This cooling passage has a structure in which a partition plate 7Z is provided for each winding 5 and an independent oil chamber 20 is formed. The oil chamber 20 is formed for each winding on the lower iron core fastening fitting 7 arranged on both sides of the winding 5 of each phase, and an external oil guide pipe 11 is attached to the outside of the lower iron core fastening fitting 7. An oil feed pipe 12 communicating with the cooler 30 is connected to the oil guide pipe 11. The external oil guide pipe 11 is provided with a through hole 25 communicating with the oil chamber 20 of each phase. The upper surface member 7A of the lower iron core fastening fitting 7 of the oil chamber 20 is provided with a through hole 25A that opens to face the lower portion of the winding 5 .
[0012]
On the side of the tank 10, condenser 30 with an oil pump (not shown) is disposed on the upper and lower ends, the common pipe 15 is communicated with the cooler 30, the oil pipe 12 feeding the common pipe 15 is It is connected. The oil chamber 20 has an inlet connected to an oil pump (not shown) and an outlet connected to the main leg 1 and a cooling duct (not shown) of the winding 5. In this embodiment, the upper surface member 7A and the side surface member 7B of the lower iron core fastening fitting 7 are made of an insulator. A press board, a reinforced wood, etc. are used as an insulator.
[0013]
According to this configuration, since the upper surface member 7A and the side surface member 7B of the lower iron core fastening bracket 7 are made of an insulator, leakage magnetic flux (not shown) from the winding 5 is generated by the lower iron core fastener 7. be invaded, the part loss Ri of less or parts arising of localized overheating increases, insulating oil 22 of the less was Tsu a amount corresponding oil chamber 20 is no longer warm, improving cooling efficiency of the transformer In addition, the service life of the transformer, that is, the service life has been improved.
[0014]
Further, since the external oil guide pipe 11 only needs to be installed between the upper surface member 7A and the side surface member 7B in order to cool the main leg 1 and the winding 5, there is no need for a special pipe as in the prior art. Piping can be used . Thereby, piping arrangement becomes easy and work efficiency improves . Further the shown part or Raya sign of external oil guiding pipe 11 to the lower core oil chamber 20 formed in each winding of the fastening bracket 7 is provided with a through hole 25 in order to flow the insulating oil 22 As a result , it is possible to reduce the number of work steps and to manufacture at low cost.
[0015]
In addition, since the insulating oil 22 is supplied to the oil chamber 20 from the outside Aburashirube pipe 11 provided in a position away from the windings 5 and the iron core, Rihiya却効ratio good insulating oil 22 is hardly warmed Kuna' It was. Furthermore, the external Aburashirube pipe 11, since close to the winding 5 and the side member 7B from the tank 10 side, intrusion of magnetic flux leakage (not shown) from the winding 5 becomes small, it is possible to reduce the loss menu There is also a lit.
[0016]
The material of the external Aburashirube pipe 11 may be a steel sheet usually used as a lower core Clamping fixture 7, moreover by using a general-purpose rectangular pipes as are commercially available, and can be manufactured at low cost. Further, the material of the external Aburashirube pipe 11, by a silicon steel plate from steel plate, even more low-loss can be achieved.
[0017]
By the way, as shown in FIG. 1, the insulating oil 22 from the cooler 30 is diverted to the left and right through the common pipe 15. It flows from the external oil guide pipe 11 to the winding 5 through the oil supply pipe 12 on one side, that is, the left side, and flows from the external oil guide pipe 11 to the winding 5 through the oil supply pipe 12 on the right side. If the external oil guide pipe 11 on one side and the external oil guide pipe 11 on the other side are separately arranged in this way, the pipe assembly work is facilitated without interfering with each other during pipe assembly, and the work efficiency can be improved. .
[0018]
FIG. 4 shows another embodiment of the present invention. The same parts as those in FIG. As can be seen from FIG. 4, in the present embodiment has a structure in which a magnetic shunt 50 in side member 7C of the core side of the lower iron core fastening bracket 7.
[0019]
According to such a configuration, even if leakage magnetic flux (not shown) from the winding 5 tries to enter the side member 7C of the lower iron core fastening bracket 7 , it is effectively attracted by the magnetic shunt 50. The loss in the clamp 7 can be reduced and local overheating can be prevented, so that the durability and efficiency of the transformer can be improved. As the material of the magnetic shunt 50, it is effective to use a laminate of silicon steel plates having a high magnetic permeability. Moreover, an oil pump (not shown) in the cooled insulating oil 22, as indicated by the arrows outside Aburashirube pipe 11, main landing gear 1 and the winding via the oil chamber 20 provided in the lower core fastening bracket 7 since flows to 5, will be the magnetic shunt 50 in the oil chamber 20 is cooled, local heating of the magnetic shunt 50 is also able to prevent, kill a reliable stationary induction apparatus in provision.
[0020]
Figure 5 further shows the other embodiment, the same parts as in FIG. 4 will be omitted by the same reference numerals of the present invention. As can be seen from FIG. 5, in this embodiment, the external oil guide pipe 11 provided in a part of the lower iron core fastening bracket 7 is a round pipe, and the side member 7 C on the iron core side of the lower iron core fastener 7 is magnetically connected. The shunt 50 is arranged in the longitudinal direction (perpendicular to the paper surface) of the tank 10.
[0021]
According to such a configuration, even if leakage magnetic flux (not shown) from the winding 5 tries to enter the side member 7C of the lower iron core fastening bracket 7 , it is effectively attracted by the magnetic shunt 50. The loss in the clamp 7 can be reduced and local overheating can be prevented, so that the durability and efficiency of the transformer can be improved. The material of the external Aburashirube pipe 11 may be a steel sheet in the lower core fastening bracket 7 is typically used, moreover by using a round pipe, such as is commercially available, and low cost can be Rukoto.
[0022]
Furthermore, using the round pipe to the outside Aburashirube pipe 11 communicating with the lower core Clamping fixture 7, may be used round pipe to connect the lead wire and other electrical equipment to be drawn from the winding . In this case, it is necessary that the round pipe is provided with an insulating means at a location where it is connected to another electric conductor, or the round pipe is made of an insulating material or covered with an insulating material.
[0023]
6 and 7 show still another embodiment of the present invention. The same parts as those in FIGS. 1 and 3 are denoted by the same reference numerals, and the description thereof is omitted. As can be seen from FIGS. 6 and 7 , in this embodiment, the insulating oil 22 is clamped from one external oil guide pipe 11 to the lower iron core 11 via the common pipe 15 and the oil feed pipe 12 from the cooler 30 as indicated by arrows. The structure flows into the attachment 7. In addition, the insulating oil 22 that has flowed into the lower iron core fastening bracket 7 via the external oil guide pipe 11 flows into the right winding 5 in the drawing, as shown by the arrows, and the lower iron core fastening is on the other side. The lower core fastening bracket 7 on the opposite side is shunted downward via a through hole 25B provided in a part of the lower surface member 7D of the bracket 7 and via a lower cooling path 35C formed by the core base 35. It is configured to divert upward through a through hole 25B provided in a part of the lower surface member 7D, and to cool the left winding 5 and the lower core fastening fitting 7 in the drawing. Further, as shown by the arrows between the laminated core plates constituting the main leg 1, a gap through which the insulating oil 22 passes is appropriately formed. Reference numeral 10A denotes a tank bottom plate.
[0024]
That is, in this embodiment, a side surface member 7C of the lower core Clamping fixture 7, thereon, to form a space surrounded by the upper surface member 7A and the lower surface member 7D extending winding side provided at the lower end, This space is closed with a partition plate 7Z at a predetermined interval, an oil chamber 20 having a through hole 25A communicating with the winding 5 is formed, and an external oil guide pipe 11 communicating with the cooler 30 is attached to the outside of the oil chamber 20. The A core base 35 that supports the main leg 1 of each phase and is attached to the lower portion of the lower iron core fastening bracket 7 disposed on one side and the other side of the winding 5, the winding 5 and the main The lower oil passage 35C is formed by the leg 1 and the tank bottom plate 10A corresponding thereto, and the insulating oil 22 from the cooler 30 and the external oil guide pipe 11 is transferred from the right oil chamber 20 to the winding 5 and the lower oil passage 35C. The current is divided and supplied to the left oil chamber 20 to cool the winding 5.
[0025]
According to such a configuration of the present embodiment , the insulating oil 22 flows from the cooler 30 through the common pipe 15 and the oil feed pipe 12 to the lower core fastening fitting 7 from the one external oil guide pipe 11. since you are a structure, since the oil feed pipe 12 of Figure 1 can be one less, Ru can provide stationary induction apparatus inexpensive. Also, external Aburashirube insulating oil 22 which was poured into the oil chamber 20 from the pipe 11 by providing the lower oil passage 35C to flow to the opposite side of the oil chamber 20, it must become rather that only set a dedicated Aburashirube pipe, Since the lower side of the main leg 1 and the winding 5 can be directly cooled, efficient cooling can be performed.
[0026]
That is, the lower side of the main landing gear 1 and the winding 5 is always cooled by the insulating oil 22 in the lower oil passage 35C Runode, it is possible to improve the cold却効rate.
[0027]
8 and 9 show still another embodiment of the present invention. The same parts as those in FIGS. 6 and 7 are denoted by the same reference numerals, and the description thereof is omitted. As it can be seen from FIGS. 8 and 9, an arrow in this embodiment by eliminating the external Aburashirubehai tube, common pipe 15 from the cooler 30 via the oil supply pipe 12 to the oil chamber 20 of the lower core Clamping fixture 7 As shown in FIG. 6, the insulating oil 22 is flowed.
[0028]
According to such a configuration, the common pipe 15 from the condenser 30, directly through the oil supply pipe 12, in the oil chamber 20 provided in the lower core fastening bracket 7 to be flow of insulating oil 22, simple structure together becomes, Ru can provide a highly reliable stationary induction apparatus is inexpensive can omit the external Aburashirubehai tube.
[0029]
10 and 11 illustrates yet another embodiment of the present invention. The same parts as those in FIGS. 8 and 9 are denoted by the same reference numerals, and the description thereof is omitted. Without external Aburashirubehai tube in this embodiment as can be seen from FIGS. 10 and 11, a common pipe 15 from the condenser 30 located on both sides of the transformer main body via the oil feeding pipe 12, the lower core-clamping As shown by the arrow, the insulating oil 22 is made to flow into the oil chamber 20 provided in the attachment 7.
[0030]
According to this configuration, the insulating oil 22 cooled by the cooler 30 passes through the common pipe 15 and the oil feeding pipe 12 from both sides, as indicated by arrows, and the oil chamber 20 configured by the lower core fastening bracket 7. to flow into, Ru can provide stationary induction apparatus in which cooling efficiency is improved.
[0031]
In addition, since the coolers 30 are distributed and arranged on the left and right side surfaces perpendicular to the longitudinal direction of the windings 5 of each phase, the longitudinal direction of the windings 5 of each phase does not become long and the coolers 30 are arranged in a row. as compared with the case of arranging, wider spacing width, easily work starvation.
[0032]
Figure 12 shows a further embodiment of the present invention. The same parts as those in FIG. 10 are denoted by the same reference numerals, and the description thereof is omitted. As can be seen from FIG. 12, in this embodiment , the cooler 30, the common pipe 15, and the oil feed pipe 12 are arranged on both sides facing the side legs 2 forming the iron core, and the external oil guide pipe 11 and the lower iron core are tightened. As shown by the arrow, the insulating oil 22 is allowed to flow into the oil chamber 20 formed by the attachment 7.
[0033]
According to this configuration, by disposing the cooler 30 on both sides of the tank 10, the oil supply pipe 12 and the common pipe 15 of this embodiment are compared with the oil supply pipe 12 and the common pipe 15 of FIG. 1. since it can be greatly reduced in length, insulating oil 11 is less likely to warm, a that good cooling efficiency. Since increased mechanical strength the length of the oil feed pipe 12 and common pipe 15 is greatly reduced, the magnetic vibrations of the transformer, small vibration of the oil feed pipe 12 and common pipe 15 kuna is, The risk of leakage of insulation oil at the connection point is reduced .
[0034]
Also it is possible to reduce the number of oil feed pipe 12 for cooling the main leg 1 and winding 5 from the cooler 30 reduces the number of assembly steps, Ru can be increased work efficiency.
[0035]
In the various embodiments described above, the case where the iron core fastener 7 is composed of a normally used steel plate and an insulator has been described as an example, but the same effect can be expected even when all the insulators are made of an insulator. Needless to say.
[0036]
Furthermore, since the common pipe 15 and the cooler 30 on one side and the common pipe 15 and the cooler 30 are separately arranged on the other side in the same manner as in FIG. 10 described above, they interfere with each other when the pipe and the cooler are assembled. Narazu, because the cooler and piping can be seen immediately, with forgotten and, it is possible to prevent the assembly mistake, it is work in peace worker, can Rukoto to improve the efficiency of the assembly work.
[0037]
FIG. 13 shows still another embodiment of the present invention . The same parts as those in FIG. 12 are denoted by the same reference numerals, and the description thereof is omitted. As can be seen from FIG. 13, in this embodiment , two external oil guide pipes 11 are connected from the cooler 30 via the common pipe 15 and the oil feed pipe 12, and the external oil guide pipe 11 and the lower iron core are tightened. The oil chamber 20 is formed by the metal fitting 7.
[0038]
According to such a configuration, since the two external oil guide pipes 11 are connected, the insulating oil 22 flowing from the cooler 30 and the common pipe 15 can be efficiently flowed to the main leg 1 and the winding 5. The cooling efficiency of the main leg 1 and the winding 5 can be improved.
[0039]
FIG. 14 shows still another embodiment of the present invention . As can be seen from FIG. 14 , in this embodiment, the insulating oil 22 flows to the oil chamber 20 via the two coolers 30, the common pipe 15, and the oil feed pipe 12, as shown by the arrows, and then the lower iron core is tightened. lower surface member of the bracket 7 (not shown) through holes provided in a part of the (not shown), a lower surface member of the core stand via (not shown) opposite the lower core fastening bracket 7 The structure is such that a hole ( not shown) provided in a part of ( not shown) flows into the oil chamber 20 and the winding 5.
[0040]
According to such a configuration, the insulating oil 22 as indicated by arrows, flow from the cooler 30 to the common pipe 15, the oil chamber 20 provided in the lower core fastening bracket 7 through the oil supply pipe 12, then the lower lower surface member of the core fastening bracket 7 through hole formed in a part of the (not shown) (not shown), core board (not shown) of the lower core clamping bracket on the opposite side via the since has a structure to flow to the lower surface member (not shown), it is possible to improve the cooling efficiency to provide a highly reliable stationary induction apparatus.
[0041]
FIG. 15 shows still another embodiment of the present invention . As can be seen from FIG. 15 , in this embodiment, the insulating oil 22 flows through the cooler 30, the common pipe 15, and the oil feeding pipe 12 to the oil chamber 20 provided in the lower iron core fastening bracket 7 as indicated by an arrow. It has a structure.
[0042]
According to such a configuration, the insulating oil 22 is supplied from the two coolers 30 via the common pipe 15 and the two oil feeding pipes 12 as shown by the arrows in the oil chamber 20 provided in the lower iron core fastening bracket 7. to flow, a lower surface member of the then with the lower core fasteners (not shown) via the core board (not shown), oil from the lower surface material of the lower core clamping bracket on the opposite side (not shown) Since it has a structure that flows into the chamber 20, it is possible to provide a static induction electric appliance with improved cooling efficiency in the main leg 1 and the winding 5.
[0043]
FIG. 16 shows still another embodiment of the present invention . As can be seen from Figure 16, the cooler 30 in the present embodiment, the common pipe 15, a structure in which cooling passage Ru is formed an oil chamber 20 provided in the lower core fastening bracket 7 through the oil feed pipe 12 It has become.
[0044]
According to such a configuration, the insulating oil 22 is supplied from the two coolers 30 via the common pipe 15 and the two oil feeding pipes 12 as shown by the arrows in the oil chamber 20 provided in the lower iron core fastening bracket 7. to flow, a lower surface member of the then with the lower core fasteners (not shown) via the core board (not shown), flows to the lower surface member of the lower core clamping bracket on the opposite side (not shown) Since it becomes such a structure, while the cooling efficiency in the main leg 1 and the coil | winding 5 improves, while being able to prevent the local overheating of a transformer main body, a highly reliable static induction appliance can be provided.
[0045]
In the present embodiment, in addition to the transformer insulating oil, of course it can be expected a similar effect as described above even by using a cooling medium such as SF6 gas and perfluorocarbon liquid.
【The invention's effect】
As described above, according to the present invention, or increase leakage flux loss invade from the winding, along with reducing the partial arising of localized overheating, the effect of improving the cold却効rate.
[Brief description of the drawings]
[1] shown to flat surface view cooling structure of fitting with the lower core-clamping of 3-phase 5-legged transformer in an embodiment of the stationary induction apparatus of the present invention.
FIG. 2 is a positive side view of FIG. 1.
FIG. 3 is a side view of FIG. 1 ;
FIG. 4 is an enlarged side view showing a cooling configuration of a lower iron core fastening bracket in another embodiment of the static induction appliance of the present invention.
FIG. 5 is a view corresponding to FIG. 4 in still another embodiment of the static induction electric appliance of the present invention.
FIG. 6 is a view corresponding to FIG. 1 in still another embodiment of the static induction electric appliance of the present invention.
Figure 7 is an enlarged side view shows the cooling structure of the metal with the lower portion iron core fastening of FIG.
FIG. 8 is a view corresponding to FIG. 1 in still another embodiment of the static induction electric appliance of the present invention.
Figure 9 is an enlarged side view shows the cooling structure of the metal with the lower portion iron core fastening of FIG.
FIG. 10 is a view corresponding to FIG. 1 in still another embodiment of the static induction appliance of the present invention.
Figure 11 is an enlarged side view shows the cooling structure of the metal with the lower portion iron core fastening of FIG.
FIG. 12 is a view corresponding to FIG. 1 in still another embodiment of the static induction electric appliance of the present invention.
FIG. 13 is a view corresponding to FIG. 1 in still another embodiment of the static induction electric appliance of the present invention.
[14] Further shown to flat surface view cooling structure of fitting with the lower core-clamping of the single-phase Seretakoa transformers in other embodiments of the stationary induction apparatus of the present invention.
[Figure 15] shows to flat surfaces view the cooling arrangement further fitting with bottom core tightening of single-phase two-legged transformers in other embodiments of the stationary induction apparatus of the present invention.
[Figure 16] shows to flat surfaces view the cooling arrangement further fitting with bottom core tightening of a single-phase four-legged transformers in other embodiments of the stationary induction apparatus of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Main leg, 2 ... Side leg, 3 ... Upper yoke, 4 ... Lower yoke, 5 ... Winding, 6 ... Upper iron core clamp, 7 ... Lower iron fastener, 7A ... Upper surface member, 7B, 7C: Side member, 7D: Lower surface member, 10 ... Tank, 11 ... Outer oil guide pipe, 12 ... Oil feed pipe, 15 ... Common pipe, 20 ... Oil chamber, 22 ... Insulating oil, 25, 25A, 25B ... Through hole 30 ... Cooler, 35 ... Core stand, 50 ... Magnetic shunt.

Claims

鉄心と、該鉄心に巻回された巻線と、該巻線の上部及び下部で上記鉄心を両側から締付ける鉄心締付金具とから成る変圧器本体をタンク内に収納し、上記タンクと冷却器との間で冷却媒体を循環させて冷却する静止誘導電器において、上記両側の下部鉄心締付金具に上記巻線の下部に対向した範囲内の大きさの独立した油室を夫々形成すると共に、これら油室に上記巻線の下部に対向して開口する貫通穴を形成し、かつ、該油室に上記冷却媒体を供給するように構成したことを特徴とする静止誘導電器。A transformer body comprising an iron core, a winding wound around the iron core, and an iron core fastening bracket for fastening the iron core from both sides at the upper and lower portions of the winding is housed in a tank, and the tank and the cooler In the static induction appliance that circulates the cooling medium between and cools, an independent oil chamber having a size within a range facing the lower part of the winding is formed in each of the lower core fasteners on both sides , and these oil chamber forms the shape of the through hole that opens in face of the lower portion of the winding and stationary induction apparatus which is characterized by being configured to supply the cooling medium to the oil chamber.

鉄心と、該鉄心に巻回された巻線と、該巻線の上部及び下部で上記鉄心を両側から締付ける鉄心締付金具とから成る変圧器本体をタンク内に収納し、上記タンクと冷却器との間で冷却媒体を循環させて冷却する静止誘導電器において、上記両側の下部鉄心締付金具に上記巻線の下部に対向した範囲内の大きさの独立した油室を夫々形成すると共に、これら油室に上記巻線の下部に対向して開口する貫通穴を形成し、かつ、上記両側の下部鉄心締付金具に形成された油室を連通する冷却路を形成し、上記両側の下部鉄心締付金具に形成された油室の一方側に上記冷却媒体を供給するように構成したことを特徴とする静止誘導電器。A transformer body comprising an iron core, a winding wound around the iron core, and an iron core fastening bracket for fastening the iron core from both sides at the upper and lower portions of the winding is housed in a tank, and the tank and the cooler In the static induction appliance that circulates the cooling medium between and cools, an independent oil chamber having a size within a range facing the lower part of the winding is formed in each of the lower core fasteners on both sides , and these oil chamber a through hole that opens in face of the lower portion of the winding to form formed in, and forming a cooling path communicating the oil chamber formed in fitting with the lower core-clamping of the both sides of the sides A stationary induction apparatus configured to supply the cooling medium to one side of an oil chamber formed in a lower iron core clamp.

鉄心と、該鉄心に巻回された巻線と、該巻線の上部及び下部で上記鉄心を両側から締付ける鉄心締付金具とから成る変圧器本体をタンク内に収納し、上記タンクと冷却器との間で冷却媒体を循環させて冷却する静止誘導電器において、上記両側の下部鉄心締付金具に上記巻線の下部に対向した範囲内の大きさの独立した油室を夫々形成すると共に、これら油室に上記巻線の下部に対向して開口する貫通穴を形成し、かつ、上記鉄心を支持し上記両側の下部鉄心締付金具の下部に位置するコア台とタンク底面とによって上記両側の下部鉄心締付金具に形成された油室を連通する冷却路を形成し、上記両側の下部鉄心締付金具に形成された油室の一方側に上記冷却媒体を供給するように構成したことを特徴とする静止誘導電器。A transformer body comprising an iron core, a winding wound around the iron core, and an iron core fastening bracket for fastening the iron core from both sides at the upper and lower portions of the winding is housed in a tank, and the tank and the cooler In the static induction appliance that circulates the cooling medium between and cools, an independent oil chamber having a size within a range facing the lower part of the winding is formed in each of the lower core fasteners on both sides , and these oil chamber to face the lower portion of the winding to form formed a through hole which is open to, and supporting the core above the core base and the tank bottom, located at the bottom of the bracket with the lower core tightening of the sides A cooling path that communicates with the oil chamber formed in the lower iron core clamps on both sides is formed, and the cooling medium is supplied to one side of the oil chamber formed in the lower iron core clamps on both sides. A static induction device characterized by that.

鉄心と、該鉄心に巻回された巻線と、該巻線の上部及び下部で上記鉄心を両側から締付ける鉄心締付金具とから成る変圧器本体をタンク内に収納し、上記タンクと冷却器との間で冷却媒体を循環させて冷却する静止誘導電器において、上記両側の下部鉄心締付金具に上記巻線の下部に対向した範囲内の大きさの独立した油室を夫々形成すると共に、これら油室に上記巻線の下部に対向して開口する貫通穴を形成し、かつ、該油室に上記冷却媒体を供給するように構成し、上記冷却器は上記タンクの両側に配置されていることを特徴とする静止誘導電器。A transformer body comprising an iron core, a winding wound around the iron core, and an iron core fastening bracket for fastening the iron core from both sides at the upper and lower portions of the winding is housed in a tank, and the tank and the cooler In the static induction appliance that circulates the cooling medium between and cools, an independent oil chamber having a size within a range facing the lower part of the winding is formed in each of the lower core fasteners on both sides , and opposite the lower portion of the winding to these oil chambers form the shape of the through hole which is open and configured to supply the cooling medium to the oil chamber, the cooler is arranged on both sides of the tank A static induction appliance characterized by

上記下部鉄心締付金具の側面部材は、絶縁物で構成されていることを特徴とする請求項１，２，３又は４記載の静止誘導電器。 The stationary induction machine according to claim 1, 2, 3, or 4, wherein the side member of the lower iron core fastening bracket is made of an insulator.

上記下部鉄心締付金具の鉄心側の側面部材に磁気シャントを設けたことを特徴とする請求項１，２，３又は４記載の静止誘導電器。 5. A static induction device according to claim 1, wherein a magnetic shunt is provided on a side member on the iron core side of the lower iron core fastening bracket.