JPH09115737A - Gas insulated transformer - Google Patents
Gas insulated transformerInfo
- Publication number
- JPH09115737A JPH09115737A JP26970595A JP26970595A JPH09115737A JP H09115737 A JPH09115737 A JP H09115737A JP 26970595 A JP26970595 A JP 26970595A JP 26970595 A JP26970595 A JP 26970595A JP H09115737 A JPH09115737 A JP H09115737A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- transformer tank
- transformer
- cooler
- gas cooler
- 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.)
- Pending
Links
Landscapes
- Transformer Cooling (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はガス絶縁変圧器に係
り、特に、冷却媒体としてＳＦ6 ガスを使用し、地下変
電所等に設置するのに好適なガス絶縁変圧器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated transformer, and more particularly to a gas-insulated transformer that uses SF 6 gas as a cooling medium and is suitable for installation in an underground substation or the like.
【０００２】[0002]
【従来の技術】都市に設置する変圧器には防災上、不燃
化の要望が強く、また、電力需要の増大から大容量化の
要求も強い。さらに、設置場所の確保が困難となってき
ているので、ビルの地下に設置する例も多くなってお
り、建設コストの低減のため、階高低減、及び変圧器の
小形化が要求されている。不燃性の絶縁冷却媒体を用い
た変圧器として、ＳＦ6ガスを絶縁冷却媒体にしたガス
絶縁変圧器があるが、ＳＦ6ガスは、密度，比熱，熱伝
導率などの冷却性能に関する物性値が液状絶縁冷却媒体
に比べ小さいために一般には冷却性能が悪い。2. Description of the Related Art There is a strong demand for non-combustible transformers installed in cities for disaster prevention, and there is also a strong demand for larger capacity due to an increase in power demand. In addition, as it is becoming difficult to secure the installation location, there are many examples of installation in the basement of a building, and in order to reduce the construction cost, it is required to reduce the floor height and downsize the transformer. . As a transformer using a non-flammable insulating cooling medium, there is a gas-insulated transformer using SF 6 gas as an insulating cooling medium. SF 6 gas has physical properties related to cooling performance such as density, specific heat and thermal conductivity. Since it is smaller than the liquid insulation cooling medium, the cooling performance is generally poor.
【０００３】このため、大容量ガス絶縁変圧器では、Ｓ
Ｆ6 ガスの圧力を高めて密度を大きくし、変圧器を小形
化を図る傾向にある。さらに、ＳＦ6 ガスの体積流量を
できるだけ多くして流速を大きくし、冷却性能を向上さ
せる方式が取られている。Therefore, in a large capacity gas insulated transformer, S
There is a tendency to increase the pressure of F 6 gas to increase the density and to downsize the transformer. Furthermore, a method is adopted in which the volumetric flow rate of SF 6 gas is increased as much as possible to increase the flow velocity and improve the cooling performance.
【０００４】大容量ガス絶縁変圧器は、発熱量が大きい
ため、製作，運搬，取付け等の容易さを狙い、冷却媒体
であるガスの冷却には、一定冷却容量の冷却器と、その
冷却器の容量に相当するガス流量のブロワを各冷却器の
出口に付け、変圧器タンク内の発熱量に見合った容量分
になるように複数台設置している。あるいは、変圧器タ
ンクから、複数本の配管よりガスを取り出し、一旦、ガ
スの集合管に導き、この集合管からガス配管により複数
台の冷却器へ導き、各冷却器からガス配管により冷却器
に付属のブロワへ導いて、さらにブロワより集合管にガ
スを集め、変圧器タンク内へガスを送入する構成とする
例が多い。Since a large-capacity gas-insulated transformer has a large amount of heat generation, it is aimed at the ease of manufacture, transportation, installation, etc. In order to cool a gas as a cooling medium, a cooler having a constant cooling capacity and its cooler are used. A blower with a gas flow rate equivalent to the capacity of is attached to the outlet of each cooler, and multiple units are installed so that the capacity corresponds to the heat generation amount in the transformer tank. Alternatively, take out gas from the transformer tank through multiple pipes, once introduce it into a gas collecting pipe, then from this collecting pipe through multiple gas pipes to multiple coolers, and from each cooler into a cooler through gas pipes. In many cases, the structure is such that the gas is guided to the attached blower, the gas is further collected from the blower into the collecting pipe, and the gas is fed into the transformer tank.
【０００５】このような構成のガス冷却装置では、冷却
器１台にブロワ１台が付くため、ブロワが故障した場
合、そのブロワが受け持つ冷却器にはガスが流れなくな
り、変圧器の冷却容量が低下する。このため、予備器を
準備する必要がある。上記ガス集合管がある場合にも、
ブロワの故障により、そのブロワに接続する冷却器が働
かなくなり、冷却容量が低下する。In the gas cooling device having such a structure, one cooler is provided with one blower. Therefore, when the blower fails, gas does not flow to the cooler which the blower takes charge of, and the cooling capacity of the transformer is reduced. descend. Therefore, it is necessary to prepare a spare device. If you have the above gas collecting pipe,
When a blower fails, the cooler connected to the blower does not work and the cooling capacity decreases.
【０００６】この改善策として、特開平2−234404 号公
報（以下、公知例１と記載する）では、２台の冷却器の
流出側に共通配管を設け、共通配管からタンクへの流路
に２台のブロワを設置し、ブロワ１台でも両冷却器へガ
スが流れるようにしている。一方、変圧器の設置スペー
スを縮小化するために、長尺のガス冷却器をその長手方
向が水平になるように設置し、ガス配管にブロワを介し
てガスの循環路を形成することが特開平5−326284 号公
報（以下、公知例２と記載する）で提案されている。As a remedy for this, in Japanese Patent Laid-Open No. 2-234404 (hereinafter, referred to as known example 1), a common pipe is provided on the outflow side of two coolers, and a common pipe is connected to the tank. Two blowers are installed, and even one blower allows gas to flow to both coolers. On the other hand, in order to reduce the installation space of the transformer, it is special to install a long gas cooler so that its longitudinal direction is horizontal and to form a gas circulation path in the gas pipe through a blower. It is proposed in Kaihei 5-326284 (hereinafter referred to as known example 2).
【０００７】[0007]
【発明が解決しようとする課題】上述した公知例１では
冷却器が２台設置され、共通配管が設けられるため、タ
ンク周辺に相当の空間を占有することになる。また、冷
却器に流入するガスは、共通配管からの分岐により曲げ
られるため、冷却器入口で流速に偏流が生じ、冷却器の
性能が十分発揮できない可能性があると共に、圧力損失
が大きくなり、循環するガスの流量が少なくなる。In the above-mentioned known example 1, since two coolers are installed and common pipes are provided, a considerable space is occupied around the tank. Further, since the gas flowing into the cooler is bent by the branch from the common pipe, the flow velocity at the inlet of the cooler may be uneven, and the performance of the cooler may not be sufficiently exhibited, and the pressure loss increases, The flow rate of the circulating gas is reduced.
【０００８】一方、公知例２では冷却器内をガスが冷却
器の長手方向に流れること、ガスの流入、及び流出方向
と冷却器内の流れ方向が異なり、曲がりの存在や流れ方
向の長さが長いことからガス流の圧力損失が大きくな
る。このため、ガスの流量が少なく、変圧器タンク内構
造物の冷却性能が小さくなる可能性がある。On the other hand, in the known example 2, the gas flows in the longitudinal direction of the cooler in the cooler, the inflow and outflow directions of the gas are different from the flow direction in the cooler, and there is a bend or the length of the flow direction. Is long, the pressure loss of the gas flow is large. Therefore, the gas flow rate is low, and the cooling performance of the transformer tank internal structure may be reduced.
【０００９】また、一般には、大容量のガス絶縁変圧器
では輸送限界から、１相１タンクとして製作され、３相
分３タンクを並べて設置することが多いが、長形の冷却
器では配置が複雑になる。In general, a large capacity gas-insulated transformer is often manufactured as one tank for one phase and three tanks for three phases are installed side by side due to the transport limit. It gets complicated.
【００１０】本発明は上述の点に鑑みなされたもので、
その第１の目的とするところは、ガスの流れによる圧力
損失を低減すると共にガス流量を確保し、変圧器及び冷
却器の冷却性能を向上させることにあり、また、第２の
目的とするところは、上記第１の目的を達成することは
勿論、ガス冷却器へガスを流すブロワが故障した場合で
あっても冷却性能を大きく落さず、変圧器タンク周辺の
配管を含めた冷却装置を小型化することができるガス絶
縁変圧器を提供するにある。The present invention has been made in view of the above points,
The first purpose is to reduce the pressure loss due to the gas flow, to secure the gas flow rate, and to improve the cooling performance of the transformer and the cooler, and the second purpose. In addition to achieving the first object, the cooling performance is not significantly reduced even when the blower for flowing the gas to the gas cooler fails, and the cooling device including the pipe around the transformer tank is provided. An object is to provide a gas-insulated transformer that can be downsized.
【００１１】[0011]
【課題を解決するための手段】本発明では、上記第１の
目的を達成するために、変圧器タンクの側方に、ガス冷
却器をその長手方向が水平になるように設置し、かつ、
このガス冷却器のガス流入側と前記変圧器タンクとを水
平直管により接続すると共に、該ガス冷却器のガス流出
側には前記水平直管と略直線的にガスを流出させる直管
が接続されていることを特徴とする。According to the present invention, in order to achieve the first object, a gas cooler is installed laterally of a transformer tank such that its longitudinal direction is horizontal, and
The gas inflow side of the gas cooler and the transformer tank are connected by a horizontal straight pipe, and the gas outflow side of the gas cooler is connected by a straight pipe that allows the gas to flow out substantially linearly with the horizontal straight pipe. It is characterized by being.
【００１２】また、上記直管には、少なくともガスの流
れを略垂直に変える曲がり部、この曲がり部より直径が
徐々に小さくなる縮流部からなる配管が接続され、更
に、この配管の下方にブロワが位置すると共に、該ブロ
ワと前記変圧器タンクとは、略直線状の前記水平直管，
ガス冷却器、及び直管と略平行に配置される水平配管に
より接続されていることを特徴とする。Further, the straight pipe is connected to at least a bend portion for changing the gas flow to be substantially vertical, and a pipe having a contraction portion having a diameter gradually smaller than that of the bend portion is connected, and further below this pipe. The blower is located, and the blower and the transformer tank are provided with the substantially straight horizontal pipe,
It is characterized by being connected by a gas cooler and a horizontal pipe arranged substantially parallel to the straight pipe.
【００１３】即ち、本発明は変圧器タンクの側方上部
に、ガス冷却器をその長手方向が水平になるように設置
し、かつ、前記変圧器タンクから１台の前記ガス冷却器
に少なくとも２本の水平直管によりガスを導き、該変圧
器タンク出口から前記ガス冷却器内伝熱部の出口までは
ガスの流れ方向を変えずに前記ガス冷却器を直径方向に
貫通するように流出するようにしたことを特徴とするも
のである。That is, according to the present invention, a gas cooler is installed at a lateral upper part of a transformer tank so that its longitudinal direction is horizontal, and at least two gas coolers are provided from the transformer tank to one gas cooler. The gas is guided by a horizontal straight pipe of the book, and flows from the outlet of the transformer tank to the outlet of the heat transfer section in the gas cooler so as to pass through the gas cooler without changing the flow direction of the gas. It is characterized by doing so.
【００１４】また、第１の目的を達成するためには、変
圧器タンクの側方上部に、ガス冷却器をその長手方向が
水平になるように設置し、かつ、このガス冷却器のガス
流入側と前記変圧器タンクとを斜め下方に傾斜している
直管により接続すると共に、該ガス冷却器のガス流出側
には下方へ傾斜した配管が接続されていてもよい。Further, in order to achieve the first object, a gas cooler is installed at a lateral upper part of the transformer tank so that its longitudinal direction is horizontal, and the gas inflow of the gas cooler. Side and the transformer tank may be connected by a straight pipe inclined obliquely downward, and a pipe inclined downward may be connected to the gas outflow side of the gas cooler.
【００１５】更に、本発明では、上記第２の目的を達成
するために、変圧器タンクの側方上部に、ガス冷却器を
その長手方向が水平になるように設置し、かつ、この１
台のガス冷却器のガス流入側と前記変圧器タンクとを少
なくとも２本の水平直管により接続すると共に、該ガス
冷却器のガス流出側には前記２本の水平直管と各々相対
向し略直線的にガスを流出させる直管が接続され、更に
この各々の直管には、ガスの流れを略真下に変える曲が
り部、この曲がり部より直径が徐々に小さくなる縮流
部、該縮流部の最小径と略同径の直管部からなる配管が
接続され、かつ、この各々の配管の下方にはブロワが位
置すると共に、該各々のブロワと前記変圧器タンクと
は、略直線状の前記水平直管，ガス冷却器、及び直管と
略平行に配置される水平配管により接続されていること
を特徴とする。Further, in the present invention, in order to achieve the above second object, a gas cooler is installed on the upper side portion of the transformer tank so that the longitudinal direction thereof is horizontal, and
The gas inflow side of the gas cooler of the stand and the transformer tank are connected by at least two horizontal straight pipes, and the gas outflow side of the gas cooler faces the two horizontal straight pipes, respectively. Straight pipes for flowing out gas in a substantially straight line are connected, and further, each of these straight pipes has a bent portion that changes the flow of the gas substantially directly below, a constricted portion whose diameter gradually becomes smaller than the bent portion, and the constricted portion. A pipe consisting of a straight pipe portion having a diameter substantially the same as the minimum diameter of the flow portion is connected, and a blower is located below each of the pipes, and each blower and the transformer tank are substantially linear. The horizontal straight pipe, the gas cooler, and the horizontal pipe arranged substantially parallel to the straight pipe are connected to each other.
【００１６】上記の如く構成することにより、変圧器タ
ンクからガス冷却器までは曲がりや分岐が無く水平直管
で接続されるため、ガス冷却器に流入するガスの偏流が
抑えられ、圧力損失が小さく抑えられるし、また、ガス
冷却器内でもガス流方向の大きな変更が無く、ガス冷却
器容器の直径方向にガスが流れるのでガス流路長が短
く、ガスの圧力損失が小さく抑えられ、また、ガス冷却
器前後のガス流入，流出口が水平方向に取り付けられる
ため、タンクからの取り出し位置を低くでき、従って、
高さ方向の寸法が小さくなり、また、下方に設置される
ブロワまでの間に長い直管を設置する余裕が生じ、ブロ
ワへの流入ガスが整流され、ブロワの性能低下も無くな
るので、上記第１の目的が達成される。With the above-mentioned structure, since the transformer tank and the gas cooler are connected by a horizontal straight pipe without bending or branching, uneven flow of gas flowing into the gas cooler is suppressed and pressure loss is reduced. In addition, the gas flow direction is not significantly changed in the gas cooler, and the gas flows in the diameter direction of the gas cooler container, so the gas flow path length is short and the pressure loss of the gas is kept small. Since the gas inflow and outflow before and after the gas cooler are mounted horizontally, the position for taking out from the tank can be lowered, and therefore,
Since the size in the height direction becomes smaller and there is a margin to install a long straight pipe up to the blower installed below, the gas flowing into the blower is rectified and the performance of the blower is not deteriorated. The purpose of 1 is achieved.
【００１７】更に、ガス冷却器には少なくとも２台のブ
ロワが設置されるので、１台が故障してもガスの冷却面
積や冷却水流量は変わらず冷却性能を大きく低下させず
に運転できるし、また、ガス冷却器は少なくとも前後４
本のガス配管で支持されることになり、耐震性や強度面
で有利になるので、上記第２の目的が達成される。Furthermore, since at least two blowers are installed in the gas cooler, even if one blower fails, the cooling area of the gas and the flow rate of the cooling water do not change, and the operation can be performed without significantly lowering the cooling performance. , And the gas cooler is at least 4
Since it will be supported by the gas pipe of the book, and it will be advantageous in terms of earthquake resistance and strength, the second object can be achieved.
【００１８】[0018]
【発明の実施の形態】以下、図示した実施例に基づいて
本発明を詳細に説明する。図１，図２、及び図３に本発
明のガス絶縁変圧器の一実施例である強制循環冷却式の
大容量ＳＦ6ガス絶縁変圧器を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments. 1, 2 and 3 show a forced circulation cooling type large capacity SF 6 gas insulated transformer which is an embodiment of the gas insulated transformer of the present invention.
【００１９】該図に示すごとく、巻線１や鉄心２を収納
した変圧器タンク３は、例えば縦型の円筒状に製作さ
れ、内部には絶縁冷却媒体であるＳＦ6 ガス４が充填さ
れている。この変圧器タンク３は、その側壁上方のタン
ク出口１１より少なくとも２本の大口径の水平直管５に
より、変圧器の１タンクの発熱量に相当する冷却容量で
一体化して大口径円筒状で短尺に製作された水冷式ガス
冷却器６に接続されている。As shown in the figure, a transformer tank 3 accommodating the windings 1 and the iron core 2 is manufactured, for example, in a vertical cylindrical shape, and is filled with SF 6 gas 4 which is an insulating cooling medium. There is. This transformer tank 3 is integrated into a large-diameter cylindrical shape with at least two horizontal straight pipes 5 having a large diameter from the tank outlet 11 above the side wall thereof, with a cooling capacity equivalent to the heat generation amount of one tank of the transformer. It is connected to a water-cooled gas cooler 6 manufactured in a short length.
【００２０】一方、水冷式ガス冷却器６の入口側とは直
径方向反対側の出口側には、水平直管５と相対向して略
直線的にガスを流出させる少なくとも２本の大口径の直
管５ａが接続され、この各々の直管５ａには、ガスの流
れを略真下に変える曲がり部７ａ、この曲がり部７ａよ
り直径が徐々に小さくなる縮流部７ｂ、該縮流部７ｂの
最小径と略同径の直管部７ｃから成る配管７が接続さ
れ、この各々の配管７の下方には直管８を経てブロワ９
が接続されている。On the other hand, at the outlet side of the water-cooled gas cooler 6 which is diametrically opposite to the inlet side, at least two large-diameter outlets are provided which face the horizontal straight pipe 5 and allow the gas to flow out substantially linearly. Straight pipes 5a are connected to each of the straight pipes 5a. A curved portion 7a that changes the flow of gas to a substantially straight position, a constricted portion 7b having a diameter gradually smaller than that of the curved portion 7a, and a constricted portion 7b. A pipe 7 composed of a straight pipe portion 7c having a diameter substantially the same as the minimum diameter is connected, and a blower 9 is provided below each pipe 7 via a straight pipe 8.
Is connected.
【００２１】この各々のブロワ９は、略直線状の変圧器
タンク３，水冷式ガス冷却器６、及び直管５ａと略平行
に配置される配管１０により、変圧器タンク３の下方側
壁に接続されている。Each of the blowers 9 is connected to the lower side wall of the transformer tank 3 by a substantially linear transformer tank 3, a water-cooled gas cooler 6, and a pipe 10 arranged substantially parallel to the straight pipe 5a. Has been done.
【００２２】図４に本実施例の強制循環冷却式の大容量
ＳＦ6 ガス絶縁変圧器に採用される水冷式ガス冷却器６
の一例を示す。FIG. 4 shows a water-cooled gas cooler 6 used in the forced circulation cooling type large capacity SF 6 gas insulated transformer of this embodiment.
An example is shown below.
【００２３】該図に示すごとく、本実施例の強制循環冷
却式の大容量ＳＦ6 ガス絶縁変圧器に採用される水冷式
ガス冷却器６は、ガスの流入，流出側には水平直管５、
及び直管５ａが、対向するようにそれぞれ２本取り付け
られ、水平直管５、及び直管５ａの端部には、取付け用
のフランジ１２が備えられている。As shown in the figure, the water-cooled gas cooler 6 used in the forced circulation cooling type large capacity SF 6 gas insulation transformer of this embodiment has a horizontal straight pipe 5 on the gas inflow and outflow sides. ,
And two straight pipes 5a are attached so as to face each other, and a flange 12 for attachment is provided at an end of each of the horizontal straight pipe 5 and the straight pipe 5a.
【００２４】このような本実施例の構成によれば、変圧
器の冷却媒体であるＳＦ6 ガス４は、ブロワ９の循環駆
動力により変圧器タンク３内に送られ、巻線１や鉄心２
等の構造物を冷却し、変圧器タンク３の上方へ流れ、タ
ンク出口１１から大口径の水平直管５を通り水冷式ガス
冷却器６に入る。前記冷却媒体であるＳＦ6 ガス４は、
水冷式ガス冷却器６内で、図示されていないが冷却水に
より冷却され、配管７，直管８を経由してブロワ９に至
る。According to the structure of this embodiment, the SF 6 gas 4 which is the cooling medium of the transformer is sent to the transformer tank 3 by the circulation driving force of the blower 9, and the winding 1 and the iron core 2 are supplied.
And the like, and flows above the transformer tank 3, and enters the water-cooled gas cooler 6 from the tank outlet 11 through the horizontal straight pipe 5 having a large diameter. SF 6 gas 4 as the cooling medium is
In the water-cooled gas cooler 6, although not shown, it is cooled by cooling water and reaches the blower 9 via the pipe 7 and the straight pipe 8.
【００２５】本実施例では、タンク出口１１から水冷式
ガス冷却器６までは曲がり管や分岐部が無く、ＳＦ6 ガ
ス４は変圧器タンク３より直線的に水冷式ガス冷却器６
内に流入し、水冷式ガス冷却器６内の伝熱部を流れ方向
を大きく変えること無く水冷式ガス冷却器６の出口まで
流れる。In this embodiment, there are no bent pipes or branches from the tank outlet 11 to the water-cooled gas cooler 6, and the SF 6 gas 4 is straight from the transformer tank 3 in the water-cooled gas cooler 6.
Flows into the inside of the water-cooled gas cooler 6 and flows through the heat transfer part in the water-cooled gas cooler 6 to the outlet of the water-cooled gas cooler 6 without largely changing the flow direction.
【００２６】このため、ガスの流れによる圧力損失が小
さく抑えられ、また、偏流による水冷式ガス冷却器６内
の伝熱部での冷却性能の低下も無くなる。また、水冷式
ガス冷却器６の出入口にある水平直管５、及び直管５ａ
が水平配置であるため、水平直管５、及び５ａが上下方
向に取り付けられる場合より、変圧器タンク３外部の配
管系の高さ方向の寸法を低く抑えることができる。Therefore, the pressure loss due to the gas flow is suppressed to a small level, and the cooling performance of the heat transfer section in the water-cooled gas cooler 6 due to the uneven flow is not reduced. Further, the horizontal straight pipe 5 and the straight pipe 5a at the entrance and exit of the water-cooled gas cooler 6
Is horizontally arranged, the dimension of the piping system outside the transformer tank 3 in the height direction can be suppressed to be lower than in the case where the horizontal straight pipes 5 and 5a are attached in the vertical direction.
【００２７】即ち、変圧器タンク３の高さを低く製作で
きた場合に、その高さに合わせ、タンク出口１１を低く
しても直管８の長さを調節することにより、水冷式ガス
冷却器６の出口をブロワ９に接続することができる。ま
た、水冷式ガス冷却器６からの流出用の配管が２本あ
り、水冷式ガス冷却器６の重量を支える強度が確保され
る。一方、ブロワ９も２台あるため、１台が故障しても
水冷式ガス冷却器６へ２本の水平直管５によりガスが流
入し、水冷式ガス冷却器６の伝熱面積及び冷却水の流量
が変わらないため、冷却性能は半分までは下がらず、若
干下がる程度である。That is, when the height of the transformer tank 3 can be made low, by adjusting the length of the straight pipe 8 according to the height of the transformer tank 3 even if the tank outlet 11 is lowered, the water cooling type gas cooling The outlet of the vessel 6 can be connected to the blower 9. Further, since there are two pipes for flowing out from the water-cooled gas cooler 6, the strength for supporting the weight of the water-cooled gas cooler 6 is secured. On the other hand, since there are also two blowers 9, even if one fails, the gas flows into the water-cooled gas cooler 6 through the two horizontal straight pipes 5, and the heat transfer area of the water-cooled gas cooler 6 and the cooling water. The cooling performance does not decrease to half, but slightly decreases, because the flow rate of does not change.
【００２８】図５に本発明のガス絶縁変圧器の他の実施
例を示す。該図に示す実施例では、変圧器タンク３から
水冷式ガス冷却器６への大口径の水平直管５をやや下向
きに傾斜させて設置し、水冷式ガス冷却器６の出口から
の配管１３を直角より開いた角度の曲がり管１３ａで直
管８ａへ接続されている。他の構成は、上述した実施例
と同一である。FIG. 5 shows another embodiment of the gas insulated transformer of the present invention. In the embodiment shown in the figure, a large-diameter horizontal straight pipe 5 from the transformer tank 3 to the water-cooled gas cooler 6 is installed with a slight inclination, and a pipe 13 from the outlet of the water-cooled gas cooler 6 is installed. Is connected to the straight pipe 8a by a bent pipe 13a whose angle is open from a right angle. The other structure is the same as that of the above-mentioned embodiment.
【００２９】本実施例では、上述した実施例と同様な効
果を達成できることは勿論、変圧器タンク３からブロワ
９までの距離を短くでき、設置面積を縮小化できる効果
がある。In this embodiment, not only the same effects as those of the above-described embodiments can be achieved, but also the distance from the transformer tank 3 to the blower 9 can be shortened and the installation area can be reduced.
【００３０】以上種々説明した構成による本実施例の効
果をまとめると、本実施例では、変圧器タンクより水冷
式ガス冷却器へのガス流入配管中に曲がり管や分岐部が
無く、ガスは水平の直管で導かれるため、ガスの流れに
よる圧力損失が小さく抑えられ、ガスの流量が確保でき
るし、変圧器タンクからのガスの出口高さを低くして
も、水冷式ガス冷却器をブロワに接続でき、変圧器全体
の高さを低くできる。地下変電所では、構造物の高さを
低くできることは、地下変電所の建設費を低くできるこ
とになる。In summary, the effects of this embodiment having the above-described various configurations are summarized as follows: In this embodiment, there is no bent pipe or branch in the gas inflow pipe from the transformer tank to the water-cooled gas cooler, and the gas is horizontal. Since it is guided by a straight pipe, the pressure loss due to the flow of gas can be suppressed to a small level, and the flow rate of gas can be secured. The height of the entire transformer can be reduced. In an underground substation, lowering the height of a structure can lower the construction cost of the underground substation.
【００３１】また、水冷式ガス冷却器は、２本の配管で
支えられるため、支持強度が確保でき、水冷式ガス冷却
器の他の支持部材を簡略化できるし、一つの水冷式ガス
冷却器に並列にブロワが２台設置されるため、１台が故
障しても水冷式ガス冷却器の伝熱面積及び冷却水の流量
は変化しないので、水冷式ガス冷却器の冷却性能が半分
までは低下せず、若干低下する程度である。更に、水冷
式ガス冷却器の大容量化により、変圧器タンクに対し１
台の水冷式ガス冷却器を設置するため、冷却配管系が小
形化でき、全体として低コスト化が図れる。Further, since the water-cooled gas cooler is supported by two pipes, the supporting strength can be secured, other supporting members of the water-cooled gas cooler can be simplified, and one water-cooled gas cooler can be used. Since two blowers are installed in parallel with each other, even if one fails, the heat transfer area of the water-cooled gas cooler and the flow rate of the cooling water do not change. It does not decrease, but decreases slightly. Furthermore, due to the large capacity of the water-cooled gas cooler, 1
Since the water-cooled gas cooler is installed on the stand, the cooling pipe system can be downsized and the cost can be reduced as a whole.
【００３２】[0032]
【発明の効果】以上説明した本発明のガス絶縁変圧器に
よれば、変圧器タンクの側方に、ガス冷却器をその長手
方向が水平になるように設置し、かつ、このガス冷却器
のガス流入側と前記変圧器タンクとを水平直管により接
続すると共に、該ガス冷却器のガス流出側には前記水平
直管と略直線的にガスを流出させる直管が接続されてい
るものであるから、変圧器タンクからガス冷却器までは
曲がりや分岐が無く水平直管で接続されるため、ガス冷
却器に流入するガスの偏流が抑えられ、圧力損失が小さ
く抑えられるし、また、ガス冷却器内でもガス流方向の
大きな変更が無く、ガス冷却器容器の直径方向にガスが
流れるのでガス流路長が短く、ガスの圧力損失が小さく
抑えられので、ガスの流れによる圧力損失を低減すると
共にガス流量を確保し、変圧器及び冷却器の冷却性能を
向上させることができる。According to the gas-insulated transformer of the present invention described above, the gas cooler is installed laterally of the transformer tank so that its longitudinal direction is horizontal, and The gas inflow side and the transformer tank are connected by a horizontal straight pipe, and the gas outflow side of the gas cooler is connected with a straight pipe for flowing out gas substantially linearly with the horizontal straight pipe. Therefore, since there is no bending or branching from the transformer tank to the gas cooler and it is connected by a horizontal straight pipe, uneven flow of gas flowing into the gas cooler is suppressed, pressure loss is suppressed to a small level, and gas is also suppressed. Even in the cooler, there is no significant change in the gas flow direction, and the gas flows in the diameter direction of the gas cooler container, so the gas flow path length is short and the gas pressure loss is kept small, so the pressure loss due to the gas flow is reduced. The gas flow rate And it can improve the cooling performance of the transformer and a condenser.
【００３３】また、変圧器タンクの側方上部に、ガス冷
却器をその長手方向が水平になるように設置し、かつ、
この１台のガス冷却器のガス流入側と前記変圧器タンク
とを少なくとも２本の水平直管により接続すると共に、
該ガス冷却器のガス流出側には前記２本の水平直管と各
々相対向し略直線的にガスを流出させる直管が接続さ
れ、更にこの各々の直管には、ガスの流れを略真下に変
える曲がり部、この曲がり部より直径が徐々に小さくな
る縮流部、該縮流部の最小径と略同径の直管部からなる
配管が接続され、かつ、この各々の配管の下方にはブロ
ワが位置すると共に、該各々のブロワと前記変圧器タン
クとは、略直線状の前記水平直管，ガス冷却器、及び直
管と略平行に配置される水平配管により接続されている
ものであるから、ガス冷却器には少なくとも２台のブロ
ワが設置されるので、１台が故障してもガスの冷却面積
や冷却水流量は変わらず冷却性能を大きく低下させずに
運転できるし、また、ガス冷却器は少なくとも前後４本
のガス配管で支持されることになり、耐震性や強度面で
有利になるので、上述した効果は勿論、ガス冷却器へガ
スを流すブロワが故障した場合であっても冷却性能を大
きく落さず、変圧器タンク周辺の配管を含めた冷却装置
を小型化することができる効果がある。A gas cooler is installed on the upper side of the transformer tank so that its longitudinal direction is horizontal, and
The gas inflow side of this one gas cooler and the transformer tank are connected by at least two horizontal straight pipes,
On the gas outlet side of the gas cooler, there are connected straight pipes which respectively face the two horizontal straight pipes and discharge the gas in a substantially linear manner. A pipe consisting of a bent portion to be changed directly below, a contracted portion having a diameter gradually smaller than that of the bent portion, and a straight pipe portion having a diameter substantially the same as the minimum diameter of the contracted portion is connected, and below each pipe. Blowers are located in the pipes, and the respective blowers and the transformer tank are connected by the substantially straight straight pipes, the gas cooler, and horizontal pipes arranged substantially parallel to the straight pipes. Since at least two blowers are installed in the gas cooler, even if one blows down, the cooling area of the gas and the flow rate of cooling water do not change, and it can be operated without significantly reducing the cooling performance. Also, the gas cooler is supported by at least four gas pipes at the front and rear. Since it will be advantageous in terms of earthquake resistance and strength, the cooling effect will not be greatly deteriorated even if the blower that flows the gas to the gas cooler fails, as well as the above effects, and the surroundings of the transformer tank There is an effect that the cooling device including the piping can be downsized.
【図１】本発明のガス絶縁変圧器の一実施例を示す正面
図である。FIG. 1 is a front view showing an embodiment of a gas insulation transformer of the present invention.
【図２】図１の側面図である。FIG. 2 is a side view of FIG.
【図３】図１の平面図である。FIG. 3 is a plan view of FIG. 1;
【図４】本発明の一実施例のガス絶縁変圧器に採用され
る水冷式ガス冷却器の平面図である。FIG. 4 is a plan view of a water-cooled gas cooler used in the gas-insulated transformer of one embodiment of the present invention.
【図５】本発明のガス絶縁変圧器の他の実施例を示す正
面図である。FIG. 5 is a front view showing another embodiment of the gas insulated transformer of the present invention.
１…巻線、２…鉄心、３…変圧器タンク、４…ＳＦ6 ガ
ス、５…水平直管、５ａ…直管、６…水冷式ガス冷却
器、７，１０…配管、７ａ…曲がり部、７ｂ…縮流部、
７ｃ…直管部、８，８ａ…直管、９…ブロワ、１１…タ
ンク出口、１２…フランジ。1 ... Winding wire, 2 ... Iron core, 3 ... Transformer tank, 4 ... SF 6 gas, 5 ... Horizontal straight pipe, 5a ... Straight pipe, 6 ... Water-cooled gas cooler, 7, 10 ... Piping, 7a ... Bent part , 7b ... constriction part,
7c ... Straight pipe part, 8, 8a ... Straight pipe, 9 ... Blower, 11 ... Tank outlet, 12 ... Flange.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤田 裕幸 茨城県日立市国分町一丁目１番１号 株式 会社日立製作所国分工場内 (72)発明者 平石 清登 茨城県日立市国分町一丁目１番１号 株式 会社日立製作所国分工場内 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiroyuki Fujita 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Kokubu Plant, Hitachi, Ltd. (72) Inventor Kiyoto Hiraishi 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture No. 1 Inside the Kokubu Plant of Hitachi, Ltd.
Claims (9)
共に収納する変圧器タンクと、該変圧器タンクからのガ
スを冷却するガス冷却器と、該ガス冷却器で冷却された
ガスを前記変圧器タンク内に戻し循環させるブロワと、
これら各機器を接続する配管とを備えたガス絶縁変圧器
において、 前記変圧器タンクの側方に、前記ガス冷却器をその長手
方向が水平になるように設置し、かつ、このガス冷却器
のガス流入側と前記変圧器タンクとを水平直管により接
続すると共に、該ガス冷却器のガス流出側には前記水平
直管と略直線的にガスを流出させる直管が接続されてい
ることを特徴とするガス絶縁変圧器。1. A transformer tank that accommodates a winding and an iron core together with a gas that is a cooling medium, a gas cooler that cools the gas from the transformer tank, and a gas that is cooled by the gas cooler. A blower that circulates back into the transformer tank,
In a gas-insulated transformer provided with a pipe for connecting each of these devices, the gas cooler is installed on the side of the transformer tank so that its longitudinal direction is horizontal, and The gas inflow side and the transformer tank are connected by a horizontal straight pipe, and the gas outflow side of the gas cooler is connected with a straight pipe for outflowing gas substantially linearly with the horizontal straight pipe. Characteristic gas insulated transformer.
共に収納する変圧器タンクと、該変圧器タンクからのガ
スを冷却するガス冷却器と、該ガス冷却器で冷却された
ガスを前記変圧器タンク内に戻し循環させるブロワと、
これら各機器を接続する配管とを備えたガス絶縁変圧器
において、 前記変圧器タンクの側方に、前記ガス冷却器をその長手
方向が水平になるように設置し、かつ、このガス冷却器
のガス流入側と前記変圧器タンクとを水平直管により接
続すると共に、該ガス冷却器のガス流出側には前記水平
直管と略直線的にガスを流出させる直管が接続され、更
にこの直管には、少なくとも前記ガスの流れを略垂直に
変える曲がり部、この曲がり部より直径が徐々に小さく
なる縮流部からなる配管が接続されていることを特徴と
するガス絶縁変圧器。2. A transformer tank that houses a winding and an iron core together with a gas that is a cooling medium, a gas cooler that cools the gas from the transformer tank, and a gas that is cooled by the gas cooler. A blower that circulates back into the transformer tank,
In a gas-insulated transformer provided with a pipe for connecting each of these devices, the gas cooler is installed on the side of the transformer tank so that its longitudinal direction is horizontal, and The gas inflow side and the transformer tank are connected by a horizontal straight pipe, and the gas outflow side of the gas cooler is connected with a straight pipe for outflowing gas substantially linearly with the horizontal straight pipe. A gas-insulated transformer, characterized in that at least a bent portion for changing the flow of the gas into a substantially vertical direction and a constricted portion having a diameter gradually smaller than that of the bent portion are connected to the pipe.
共に収納する変圧器タンクと、該変圧器タンクからのガ
スを冷却するガス冷却器と、該ガス冷却器で冷却された
ガスを前記変圧器タンク内に戻し循環させるブロワと、
これら各機器を接続する配管とを備えたガス絶縁変圧器
において、 前記変圧器タンクの側方に、前記ガス冷却器をその長手
方向が水平になるように設置し、かつ、このガス冷却器
のガス流入側と前記変圧器タンクとを水平直管により接
続すると共に、該ガス冷却器のガス流出側には前記水平
直管と略直線的にガスを流出させる直管が接続され、更
にこの直管には、前記ガスの流れを略垂直に変える曲が
り部、この曲がり部より直径が徐々に小さくなる縮流
部、該縮流部の最小径と略同径の直管部からなる配管が
接続され、かつ、この配管の下方に前記ブロワが位置す
ると共に、該ブロワと前記変圧器タンクとは、略直線状
の前記水平直管，ガス冷却器、及び直管と略平行に配置
される水平配管により接続されていることを特徴とする
ガス絶縁変圧器。3. A transformer tank that accommodates a winding or an iron core together with a gas that is a cooling medium, a gas cooler that cools the gas from the transformer tank, and a gas that is cooled by the gas cooler. A blower that circulates back into the transformer tank,
In a gas-insulated transformer provided with a pipe for connecting each of these devices, the gas cooler is installed on the side of the transformer tank so that its longitudinal direction is horizontal, and The gas inflow side and the transformer tank are connected by a horizontal straight pipe, and the gas outflow side of the gas cooler is connected with a straight pipe for outflowing gas substantially linearly with the horizontal straight pipe. The pipe is connected to a bend portion that changes the flow of the gas substantially vertically, a contraction portion whose diameter is gradually smaller than the bend portion, and a pipe that is a straight pipe portion having a diameter substantially the same as the minimum diameter of the contraction portion. And the blower is located below this pipe, and the blower and the transformer tank are arranged substantially parallel to the horizontal straight pipe, the gas cooler, and the straight pipe. Gas insulation characterized by being connected by piping Transformer.
共に収納した変圧器タンクと、該変圧器タンクからのガ
スを冷却するガス冷却器と、該ガス冷却器で冷却された
ガスを前記変圧器タンク内に戻し循環させるブロワと、
これら各機器を接続する配管とを備えたガス絶縁変圧器
において、 前記変圧器タンクの側方上部に、前記ガス冷却器をその
長手方向が水平になるように設置し、かつ、この１台の
ガス冷却器のガス流入側と前記変圧器タンクとを少なく
とも２本の水平直管により接続すると共に、該ガス冷却
器のガス流出側には前記２本の水平直管と各々相対向し
略直線的にガスを流出させる直管が接続され、更にこの
各々の直管には、前記ガスの流れを略真下に変える曲が
り部、この曲がり部より直径が徐々に小さくなる縮流
部、該縮流部の最小径と略同径の直管部からなる配管が
接続され、かつ、この各々の配管の下方には前記ブロワ
が位置すると共に、該各々のブロワと前記変圧器タンク
とは、略直線状の前記水平直管，ガス冷却器、及び直管
と略平行に配置される水平配管により接続されているこ
とを特徴とするガス絶縁変圧器。4. A transformer tank in which windings and an iron core are housed together with a gas as a cooling medium, a gas cooler for cooling the gas from the transformer tank, and a gas cooled by the gas cooler. A blower that circulates back into the transformer tank,
In a gas-insulated transformer provided with piping for connecting each of these devices, the gas cooler is installed at a lateral upper part of the transformer tank such that its longitudinal direction is horizontal, and The gas inflow side of the gas cooler and the transformer tank are connected by at least two horizontal straight pipes, and the gas outflow side of the gas cooler opposes the two horizontal straight pipes and is substantially straight. A straight pipe for flowing out the gas is connected to each straight pipe, and each of the straight pipes has a curved portion that changes the flow of the gas substantially directly below, a constricted portion whose diameter gradually becomes smaller than the curved portion, and the constricted flow. A pipe consisting of a straight pipe part having a diameter substantially the same as the minimum diameter of the part is connected, and the blower is located below each of the pipes, and each blower and the transformer tank are substantially linear. -Shaped horizontal straight pipe, gas cooler, and substantially parallel to the straight pipe A gas-insulated transformer, characterized in that it is connected by a horizontal pipe arranged in.
共に収納した変圧器タンクと、該変圧器タンクからのガ
スを冷却するガス冷却器と、該ガス冷却器で冷却された
ガスを前記変圧器タンク内に戻し循環させるブロワと、
これら各機器を接続する配管とを備えたガス絶縁変圧器
において、 前記変圧器タンクの側方上部に、前記ガス冷却器をその
長手方向が水平になるように設置し、かつ、この１台の
ガス冷却器のガス流入側と前記変圧器タンクとを少なく
とも２本の水平直管により接続すると共に、該ガス冷却
器のガス流出側には前記２本の水平直管と各々相対向し
略直線的にガスを流出させる直管が接続され、更にこの
各々の直管には、前記ガスの流れを略真下に変える配管
が接続され、かつ、この各々の配管の下方には前記ブロ
ワが配置されていることを特徴とするガス絶縁変圧器。5. A transformer tank in which a winding and an iron core are housed together with a gas as a cooling medium, a gas cooler for cooling the gas from the transformer tank, and a gas cooled by the gas cooler. A blower that circulates back into the transformer tank,
In a gas-insulated transformer provided with piping for connecting each of these devices, the gas cooler is installed at a lateral upper part of the transformer tank such that its longitudinal direction is horizontal, and The gas inflow side of the gas cooler and the transformer tank are connected by at least two horizontal straight pipes, and the gas outflow side of the gas cooler opposes the two horizontal straight pipes and is substantially straight. A straight pipe through which the gas is outflowed, and each of the straight pipes is connected to a pipe that changes the flow of the gas substantially directly below, and the blower is arranged below each of the pipes. A gas-insulated transformer characterized in that
共に収納した変圧器タンクと、該変圧器タンクからのガ
スを冷却するガス冷却器と、該ガス冷却器で冷却された
ガスを前記変圧器タンク内に戻し循環させるブロワと、
これら各機器を接続する配管とを備えたガス絶縁変圧器
において、 前記変圧器タンクの側方上部に、前記ガス冷却器をその
長手方向が水平になるように設置し、かつ、前記変圧器
タンクから１台の前記ガス冷却器に少なくとも２本の水
平直管によりガスを導き、該変圧器タンク出口から前記
ガス冷却器内伝熱部の出口まではガスの流れ方向を変え
ずに前記ガス冷却器を直径方向に貫通するように流出す
るようにしたことを特徴とするガス絶縁変圧器。6. A transformer tank in which windings and an iron core are housed together with a gas as a cooling medium, a gas cooler for cooling the gas from the transformer tank, and a gas cooled by the gas cooler. A blower that circulates back into the transformer tank,
In a gas-insulated transformer provided with piping for connecting each of these devices, the gas cooler is installed at a lateral upper portion of the transformer tank so that its longitudinal direction is horizontal, and the transformer tank. Gas is introduced from at least one horizontal straight pipe to one of the gas coolers, and the gas is cooled from the outlet of the transformer tank to the outlet of the heat transfer part in the gas cooler without changing the flow direction of the gas. A gas-insulated transformer, characterized in that it flows out so as to penetrate through the vessel in the diameter direction.
共に収納した変圧器タンクと、該変圧器タンクからのガ
スを冷却するガス冷却器と、該ガス冷却器で冷却された
ガスを前記変圧器タンク内に戻し循環させるブロワと、
これら各機器を接続する配管とを備えたガス絶縁変圧器
において、 前記変圧器タンクの側方上部に、前記ガス冷却器をその
長手方向が水平になるように設置し、かつ、このガス冷
却器のガス流入側と前記変圧器タンクとを斜め下方に傾
斜している直管により接続すると共に、該ガス冷却器の
ガス流出側には下方へ傾斜した配管が接続されているこ
とを特徴とするガス絶縁変圧器。7. A transformer tank having a winding and an iron core housed therein together with a gas as a cooling medium, a gas cooler for cooling the gas from the transformer tank, and a gas cooled by the gas cooler. A blower that circulates back into the transformer tank,
In a gas-insulated transformer provided with pipes for connecting each of these devices, the gas cooler is installed at a lateral upper part of the transformer tank so that its longitudinal direction is horizontal, and The gas inflow side and the transformer tank are connected by a straight pipe inclined obliquely downward, and a pipe inclined downward is connected to the gas outlet side of the gas cooler. Gas insulated transformer.
共に収納した変圧器タンクと、該変圧器タンクからのガ
スを冷却するガス冷却器と、該ガス冷却器で冷却された
ガスを前記変圧器タンク内に戻し循環させるブロワと、
これら各機器を接続する配管とを備えたガス絶縁変圧器
において、 前記変圧器タンクの側方上部に、前記ガス冷却器をその
長手方向が水平になるように設置し、かつ、この１台の
ガス冷却器のガス流入側と前記変圧器タンクとを少なく
とも２本の斜め下方に傾斜している直管により接続する
と共に、該ガス冷却器のガス流出側には前記２本の下方
へ傾斜した配管が接続され、更にこの各々の配管には、
前記ガスの流れが下降する直管が接続され、かつ、この
各々の直管の下方には前記ブロワが配置されていること
を特徴とするガス絶縁変圧器。8. A transformer tank in which windings and an iron core are housed together with a gas as a cooling medium, a gas cooler for cooling the gas from the transformer tank, and a gas cooled by the gas cooler. A blower that circulates back into the transformer tank,
In a gas-insulated transformer provided with piping for connecting each of these devices, the gas cooler is installed at a lateral upper part of the transformer tank such that its longitudinal direction is horizontal, and The gas inlet side of the gas cooler and the transformer tank are connected by at least two straight pipes inclined obliquely downward, and the gas outlet side of the gas cooler is inclined downward by the two pipes. Pipes are connected, and each of these pipes
A gas-insulated transformer, wherein straight pipes through which the flow of the gas descends are connected, and the blowers are arranged below the respective straight pipes.
共に収納した変圧器タンクと、該変圧器タンクからのガ
スを冷却するガス冷却器と、該ガス冷却器で冷却された
ガスを前記変圧器タンク内に戻し循環させるブロワと、
これら各機器を接続する配管とを備えたガス絶縁変圧器
において、 前記変圧器タンクの側方上部に、前記ガス冷却器をその
長手方向が水平になるように設置し、該ガス冷却器に
は、前記変圧器タンクからのガスが直線的に流入し、流
入したガスが直線的に流出するように配管が接続されて
いることを特徴とするガス絶縁変圧器。9. A transformer tank having a winding and an iron core housed therein together with a gas as a cooling medium, a gas cooler for cooling the gas from the transformer tank, and a gas cooled by the gas cooler. A blower that circulates back into the transformer tank,
In a gas-insulated transformer provided with a pipe connecting these respective devices, in the upper side portion of the transformer tank, the gas cooler is installed such that its longitudinal direction is horizontal, and the gas cooler has A gas-insulated transformer, wherein pipes are connected so that the gas from the transformer tank linearly flows in and the inflowing gas linearly flows out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26970595A JPH09115737A (en) | 1995-10-18 | 1995-10-18 | Gas insulated transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26970595A JPH09115737A (en) | 1995-10-18 | 1995-10-18 | Gas insulated transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09115737A true JPH09115737A (en) | 1997-05-02 |
Family
ID=17476044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26970595A Pending JPH09115737A (en) | 1995-10-18 | 1995-10-18 | Gas insulated transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09115737A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006340524A (en) * | 2005-06-03 | 2006-12-14 | Hitachi Ltd | Self-excited generator exciting device |
| JP2011530185A (en) * | 2008-08-07 | 2011-12-15 | スタークストロム−ジェラテバウ ゲーエムベーハー | Transformer system |
-
1995
- 1995-10-18 JP JP26970595A patent/JPH09115737A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006340524A (en) * | 2005-06-03 | 2006-12-14 | Hitachi Ltd | Self-excited generator exciting device |
| JP2011530185A (en) * | 2008-08-07 | 2011-12-15 | スタークストロム−ジェラテバウ ゲーエムベーハー | Transformer system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2007173685A (en) | Stationary induction electric apparatus | |
| CN206001759U (en) | Switching device for multi-gang air-conditioner and the multi-gang air-conditioner with it | |
| JPH09115737A (en) | Gas insulated transformer | |
| JPS6310562B2 (en) | ||
| JPS59135397A (en) | Secondary heat transfer circuit for liquid metal reactor | |
| DK2733266T3 (en) | Transformer platform with cooling system | |
| KR102003346B1 (en) | Cooling device for dry transformer | |
| JP3184431B2 (en) | Gas insulated stationary induction cooler | |
| JP3102527B2 (en) | Heat storage device for air-conditioning equipment using steel tube column retaining wall | |
| CN211625496U (en) | Air conditioner outdoor unit compatible with fluorine pump | |
| JP3852795B2 (en) | Water supply direct solar system | |
| JP3148044B2 (en) | Gas cooled stationary electrical equipment | |
| JP3154874B2 (en) | Gas insulated transformer | |
| CN217464891U (en) | Atmospheric primary heat exchange unit and heat supply system of gas condensing boiler | |
| JP2660779B2 (en) | Heat storage device for heating using steel tube column retaining wall | |
| JPH05166639A (en) | External cooler of gas-insulated transformer | |
| CN111271777A (en) | Air conditioner outdoor unit compatible with fluorine pump | |
| JP3102525B2 (en) | Heat storage device for air-conditioning equipment using steel tube column retaining wall | |
| JP2000064370A (en) | Water storage tank | |
| US3346041A (en) | Heat exchangers | |
| JPS6283001A (en) | Liquid metal purification device | |
| JP3194613B2 (en) | Damping heat storage device | |
| JPH07260994A (en) | Intermediate heat exchanger with built-in electromagnetic pump | |
| JPH0974650A (en) | Compressed gas insulated transmission line | |
| JPH09120916A (en) | Gas-cooled stationary induction machine |