JP7128655B2 - Oil-filled stationary induction device - Google Patents

Oil-filled stationary induction device Download PDF

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JP7128655B2
JP7128655B2 JP2018094566A JP2018094566A JP7128655B2 JP 7128655 B2 JP7128655 B2 JP 7128655B2 JP 2018094566 A JP2018094566 A JP 2018094566A JP 2018094566 A JP2018094566 A JP 2018094566A JP 7128655 B2 JP7128655 B2 JP 7128655B2
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みどり 山下
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Toshiba Industrial Products and Systems Corp
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Description

本発明の実施形態は、油入静止誘導機器に関する。 Embodiments of the present invention relate to oil-filled stationary induction equipment.

油入静止誘導機器、例えば高電圧受配電設備用の油入変圧器においては、変圧器本体を絶縁油と共に本体タンク内に収容すると共に、本体タンク内に、運転状態の変圧器において電圧調整のためにタップを切り換えるためのＬＴＣ（on-Load Tap Changer）と称される負荷時タップ切換器を備えて構成されるものがある。また、本体タンクの上部に、絶縁油の劣化を防止するためのコンサベータが設けられ、さらに、本体タンクの側方に絶縁油を冷却するための放熱器が設けられる。 In oil-filled stationary induction equipment, for example, oil-filled transformers for high-voltage power receiving and distribution equipment, the main body of the transformer is housed in the main body tank together with insulating oil, and a voltage adjustment function is placed in the main body tank in the operating state of the transformer. For this reason, there is a configuration including an on-load tap changer called an LTC (on-load tap changer) for switching taps. A conservator for preventing deterioration of the insulating oil is provided on the upper portion of the main tank, and a radiator for cooling the insulating oil is provided on the side of the main tank.

ところで、この種の油入変圧器にあっては、異常時の分解ガスを検出して遮断器を動作させるためのガス検出継電器やブッフホルツ継電器等のガス検出装置を設けて、保護を図るようにしている。このとき、本体タンクに計器等の付属部品を取付ける場合、本体タンクに取付用の穴を形成した上で、専用の取付座を溶接するといったことが行われるが、取付用の穴の形成部分にガス溜りができると、ガス検出装置によるガスの検出が正しく行えなくなる不具合が生ずる。そこで、例えば特許文献１では、ガスがマンホールの開口部に溜まらないように、開口部を埋めるような詰め物を設けることが提案されている。 By the way, in this type of oil-immersed transformer, a gas detection relay or a Buchholz relay or other gas detection device is provided to detect the cracked gas in the event of an abnormality and operate the circuit breaker for protection. ing. At this time, when attaching an accessory such as a gauge to the main tank, a mounting hole is formed in the main tank and then a dedicated mounting seat is welded. If a gas pool is formed, there arises a problem that the gas detection device cannot detect the gas correctly. Therefore, for example, Japanese Laid-Open Patent Publication No. 2002-100001 proposes to provide a stuffing to fill the opening of the manhole so that the gas does not accumulate in the opening of the manhole.

実開平３－６８１９号公報Japanese Utility Model Laid-Open No. 3-6819

しかしながら、上記のように、ガス溜りができる穴部分を詰め物によって埋める構成では、ガス溜りの形状が詰め物の配置が可能な形状となっている場合は良いが、付属部品の種類や形状によっては、穴の構造上、詰め物ができないケースもあり、必ずしも適用ができなかった。
そこで、本体タンクの上部にガス検出装置を備えたものにあって、内部で発生するガスを効果的に検出することができる油入静止誘導機器を提供する。 However, in the above-described configuration in which the hole where the gas reservoir is formed is filled with the filler, it is good if the shape of the gas reservoir allows the arrangement of the filler, but depending on the type and shape of the accessory, Due to the structure of the hole, there were cases where the filling could not be done, and it was not always possible to apply it.
Therefore, an oil-filled stationary induction device is provided which is equipped with a gas detection device on the upper part of the main body tank and which can effectively detect the gas generated inside.

実施形態に係る油入静止誘導機器は、誘導機器本体が収容されると共に絶縁油が充填される本体タンクと、前記本体タンクの上部に配置され内部で発生したガスを検出するガス検出装置と、前記本体タンクの上壁部に取付用の穴を開けた状態で取付けられるものであって、放圧装置及び負荷時タップ切換器を含む付属部品と、前記本体タンクの上壁部内面側に設けられ、該本体タンク内で発生したガスの気泡が前記付属部品の取付用の穴から逸れるように案内するための防御板とを備え、前記防御板は、前記放圧装置に下方から被せられるように配置される上面が開口した矩形箱状をなし、底面を有すると共に及び側面のうち対向する２面の上辺部を除く位置に部分的に開放した開口部を有して構成された第１の防御板と、前記負荷時タップ切換器の周囲を囲むリング板状に構成された第２の防御板とを含んでいる。 An oil-filled stationary induction device according to an embodiment includes a main body tank in which a main body of the induction device is accommodated and filled with insulating oil, a gas detection device arranged in the upper part of the main body tank and detecting gas generated inside, Attached to the upper wall of the main body tank with a mounting hole opened, an accessory part including a pressure relief device and an on-load tap changer, and an accessory part provided on the inner surface of the upper wall of the main body tank and a protection plate for guiding bubbles of gas generated in the main body tank so as to deviate from the hole for mounting the accessory part, the protection plate covering the pressure release device from below. A first rectangular box-like shape with an open upper surface, which has a bottom surface and a partially open opening at a position excluding the upper side portions of the two opposing sides among the side surfaces. It includes a guard plate and a second guard plate configured in the shape of a ring plate surrounding the on-load tap changer .

一実施形態を示すもので、油入絶縁変圧器の本体タンク部分の全体構成を示す断面図A cross-sectional view showing the overall configuration of the body tank portion of the oil-filled insulation transformer, showing one embodiment. 第１の防御板の外観を示す斜視図The perspective view which shows the external appearance of a 1st defense board. 第２の防御板の外観を示す斜視図The perspective view which shows the external appearance of a 2nd defense board.

以下、高電圧受配電設備用の油入絶縁変圧器に適用した一実施形態について、図面を参照しながら説明する。図１は、本実施形態に係る油入静止誘導機器としての油入絶縁変圧器１（以下単に「変圧器１」という）の全体構成を、放熱器を除いた状態で示している。尚、本実施形態の説明で方向をいう場合には、便宜上、本体タンクの長手方向を左右方向とし、図１を正面から見た図とする。 An embodiment applied to an oil-filled insulation transformer for high-voltage power receiving and distributing equipment will be described below with reference to the drawings. FIG. 1 shows the overall configuration of an oil-filled insulated transformer 1 (hereinafter simply referred to as "transformer 1") as an oil-filled static induction device according to this embodiment, with a radiator removed. For the sake of convenience, when referring to directions in the description of the present embodiment, the longitudinal direction of the main body tank is defined as the left-right direction, and FIG. 1 is viewed from the front.

この変圧器１は、全体として横長な矩形箱状をなす金属製の本体タンク２を備えている。この本体タンク２内には、誘導機器本体としての変圧器本体３を収容すると共に、その変圧器本体３全体が浸されるように、絶縁及び冷却用の絶縁油（例えば鉱油）Ｍが充填されている。前記変圧器本体３は、鉄心４及びその鉄心４に装着されたコイル５等からなる周知構成を備えており、本体タンク２内の例えば図で左寄り部分に配設されている。また、本体タンク２の外壁部には、電気接続用の複数個のブッシング６が設けられている。前記本体タンク２の上面を構成する天井板２ａの上面には、金属板製のタンクカバー７が重なるように設けられて、これら天井板２ａとタンクカバー７とから上壁部が構成される。 This transformer 1 has a main body tank 2 made of metal and having a horizontally long rectangular box shape as a whole. The body tank 2 accommodates a transformer body 3 as an induction device body, and is filled with insulating oil (for example, mineral oil) M for insulation and cooling so that the entire transformer body 3 is immersed. ing. The transformer main body 3 has a well-known configuration including an iron core 4 and a coil 5 attached to the iron core 4, and is arranged in the main body tank 2, for example, in a leftward portion in the figure. A plurality of bushings 6 for electrical connection are provided on the outer wall of the main body tank 2 . A tank cover 7 made of a metal plate is provided so as to overlap the upper surface of the ceiling plate 2a that constitutes the upper surface of the main body tank 2, and the ceiling plate 2a and the tank cover 7 constitute an upper wall portion.

更に、変圧器１は、本体タンク２の上部の図で左側部分に位置して、コンサベータ８を備えている。周知のように、このコンサベータ８は、上下に薄型のタンク状をなし、内部にゴム膜（ゴム袋）で区画された絶縁油Ｍの貯留部を有し、その貯留部がパイプにより前記本体タンク２内と連通している。これにて、本体タンク２内の絶縁油Ｍの温度変化に伴う膨張、収縮を吸収すると共に、外気との接触による絶縁油Ｍの劣化を防止する。また、図示はしないが、本体タンク２の前後部には、本体２内の絶縁油Ｍを冷却するための放熱器が設けられる。 Further, the transformer 1 is provided with a conservator 8 located in the upper left part of the main body tank 2 in the figure. As is well known, the conservator 8 has a shape of a thin tank on the upper and lower sides, and has a reservoir for the insulating oil M partitioned by a rubber membrane (rubber bag) inside. It communicates with the inside of the tank 2 . This absorbs the expansion and contraction of the insulating oil M in the main body tank 2 due to temperature changes, and prevents the insulating oil M from deteriorating due to contact with the outside air. Although not shown, radiators for cooling the insulating oil M in the main body 2 are provided at the front and rear portions of the main body tank 2 .

そして、変圧器１には、複数の保護用の付属部品が設けられる。具体的には、本実施形態では、本体タンク２の上壁部に、放圧装置９、ガス検出装置としてのブッフホルツ継電器１０、負荷時タップ切換器１１が設けられる。そのうち、ブッフホルツ継電器１０は、周知のように、下端部に、分解ガスを収集するガス収集部１０ａを有し、変圧器１の異常発生時に絶縁油Ｍから発生した所定量の分解ガスが検出されると、遮断器を動作させて変圧器本体３への通電等を停止させるものである。このブッフホルツ継電器１０は、本体タンク２の上壁部の例えば中央やや右側に、取付用の穴２ｃを形成すると共に、タンクカバー７に専用の取付座１３を溶接した状態で、本体タンク２の上壁部に取付けられる。 The transformer 1 is provided with a plurality of protective accessories. Specifically, in this embodiment, a pressure release device 9 , a Buchholz relay 10 as a gas detection device, and an on-load tap changer 11 are provided on the upper wall portion of the main body tank 2 . Of these, the Buchholz relay 10, as is well known, has a gas collecting part 10a for collecting cracked gas at its lower end, and a predetermined amount of cracked gas generated from the insulating oil M when an abnormality occurs in the transformer 1 is detected. Then, the circuit breaker is operated to stop the energization of the transformer main body 3 and the like. This Buchholz relay 10 has a mounting hole 2c formed in the upper wall of the main body tank 2, for example, slightly to the right of the center. Can be attached to the wall.

前記放圧装置９は、例えば変圧器本体３の異常発生時に、本体タンク２内の圧力が高圧となったことを下面側の受圧部９ａにより検出し、発生した分解ガスや膨張した絶縁油Ｍを外部に放出すると共に、警報を発するものである。この放圧装置９は、本体タンク２の上壁部の例えばほぼ中央部（ブッフホルツ継電器１０の図で左側）に、取付用の穴２ｂを形成すると共に、タンクカバー７に専用の取付座１２を溶接した状態で、本体タンク２の上壁部に取付けられる。このとき、前記受圧部９ａが本体タンク２内（絶縁油Ｍ中）に配置される。 The pressure relief device 9, for example, when an abnormality occurs in the main body 3 of the transformer, detects that the pressure in the main body tank 2 becomes high by the pressure receiving portion 9a on the lower surface side, and releases the generated cracked gas and the expanded insulating oil M. is emitted to the outside and an alarm is issued. The pressure relief device 9 has a mounting hole 2b formed in the upper wall of the main body tank 2, for example, in the center (the left side of the Buchholz relay 10 in the figure), and a mounting seat 12 dedicated to the tank cover 7. It is attached to the upper wall portion of the main body tank 2 in a welded state. At this time, the pressure receiving portion 9a is arranged in the main body tank 2 (in the insulating oil M).

前記負荷時タップ切換器１１は、運転状態の変圧器本体３のタップを切換えて電圧を調整する装置であり、図示はしないが、周知のように、負荷時タップ切換器１１は、密閉されたタンク内に、タップ選択器及び切換開閉器を収納すると共に、内部を絶縁油Ｍで満たして構成される。この負荷時タップ切換器１１は、本体タンク２の上壁部の例えば右端側（ブッフホルツ継電器１０の図で右側）に、取付用の穴２ｄを形成すると共に、タンクカバー７に専用の取付座１４を溶接した状態で、本体タンク２の上壁部に取付けられる。このとき、負荷時タップ切換器１１は、タンクの上端部が、前記本体タンク２の上壁部から上方にやや突出した形態で、大部分が本体タンク２内に配置される。 The on-load tap changer 11 is a device for switching the taps of the transformer main body 3 in operation to adjust the voltage. A tap selector and a switching switch are housed in the tank, and the inside is filled with insulating oil M. This on-load tap changer 11 has a mounting hole 2d formed in, for example, the right end side (the right side in the drawing of the Buchholz relay 10) of the upper wall of the main body tank 2, and a mounting seat 14 dedicated to the tank cover 7. is welded to the upper wall of the main body tank 2 . At this time, the on-load tap changer 11 is mostly arranged in the body tank 2 with the upper end of the tank protruding slightly upward from the upper wall of the body tank 2 .

さて、本実施形態では、前記本体タンク２の上壁部の内面側には、該本体タンク２内で発生したガスの気泡が付属部品、この場合放圧装置９及び負荷時タップ切換器１１の取付用の穴２ｂ、２ｄから逸れるように案内するための防御板１５及び１６が設けられる。具体的には、前記放圧装置９の下部には、金属板からなる第１の防御板１５が設けられる。この第１の防御板１５は、図２にも示すように、上面が開口した矩形箱状をなし、４つの側面のうち、対抗する２面この場合前面及び後面に四角形の開口部１５ａ、１５ａを有して構成されている。この第１の防御板１５は、その上端部が前記本体タンク２の上壁部に溶接されることにより、放圧装置９に下方から被せられるように取付けられている。 Now, in this embodiment, on the inner surface side of the upper wall portion of the main body tank 2, gas bubbles generated inside the main body tank 2 are attached to the attached parts, in this case, the pressure relief device 9 and the on-load tap changer 11. Guard plates 15 and 16 are provided for guiding away from the mounting holes 2b, 2d. Specifically, a first protection plate 15 made of a metal plate is provided below the pressure release device 9 . As shown in FIG. 2, the first protection plate 15 has a rectangular box shape with an open top. is configured with The first protection plate 15 is attached so as to cover the pressure release device 9 from below by welding the upper end portion thereof to the upper wall portion of the main body tank 2 .

また、前記負荷時タップ切換器１１の取付用の穴２ｄの下部には、金属板からなる第２の防御板１６が設けられる。この第２の防御板１６は、図３にも示すように、負荷時タップ切換器１１の周囲を囲む枠状この場合リング板状に構成されている。この第２の防御板１６は、その上端部が前記本体タンク２の上壁部に溶接されることにより、負荷時タップ切換器１１のうち、穴２ｄの下面側周囲に位置して取付けられている。 A second protective plate 16 made of a metal plate is provided below the hole 2d for mounting the on-load tap changer 11. As shown in FIG. As shown in FIG. 3, the second protection plate 16 is formed in the shape of a frame surrounding the on-load tap changer 11, in this case, in the shape of a ring plate. The second protection plate 16 is attached by welding its upper end portion to the upper wall portion of the main body tank 2 so as to be positioned around the lower surface side of the hole 2d of the on-load tap changer 11. there is

次に、以上のように構成された変圧器１の作用、効果について述べる。上記構成の変圧器１においては、例えば、変圧器本体３における短絡等の異常により、絶縁油Ｍの分解ガスが発生し、図１に示すように、その気泡Ｂが、絶縁油Ｍ中を真っ直ぐ上昇していく。この気泡Ｂは、ブッフホルツ継電器１０のガス収集部１０ａに収集されることに基づいて動作し、回路の遮断や警報等が行われる。ここで、もし、発生した気泡Ｂが、ブッフホルツ継電器１０のガス収集部１０ａに向かわずに、本体タンク２の上壁部の一部、特に付属部品９、１１の取付用の穴２ｂ、２ｄ部分に溜まるようなことがあると、ブッフホルツ継電器１０による正しい検出から外れてしまう虞がある。 Next, the operation and effects of the transformer 1 configured as described above will be described. In the transformer 1 configured as described above, for example, due to an abnormality such as a short circuit in the transformer main body 3, decomposition gas of the insulating oil M is generated, and as shown in FIG. rising. This air bubble B operates based on being collected by the gas collection unit 10a of the Buchholz relay 10, and interrupts the circuit, issues an alarm, or the like. Here, if the generated air bubble B does not go to the gas collection part 10a of the Buchholz relay 10, it will reach a part of the upper wall part of the main body tank 2, especially the holes 2b, 2d for mounting the accessory parts 9, 11. If there is such a thing as accumulation, there is a possibility that the correct detection by the Buchholz relay 10 will be deviated.

ところが、本実施形態では、そのようなガス溜りができそうな部分、即ち、放圧装置９の取付用の穴２ｂ部分、及び、負荷時タップ切換器１１の取付用の穴２ｄ部分の下方には、ガスの気泡Ｂが逸れるように案内する防御板１５及び１６がそれぞれ配置されている。このとき、防御板１５、１６によって、ガスの気泡Ｂの上昇時の流れを変えたり堰き止めたりすることができ、気泡Ｂが取付用の穴２ｂ、２ｄ部分に至ることを防止できる。これにより、ガスの気泡Ｂを、ブッフホルツ継電器１０のガス収集部１０ａに集めることができ、ブッフホルツ継電器１０を正しく動作させることができる。 However, in the present embodiment, there is a portion where such a gas pool is likely to occur, that is, below the hole 2b portion for mounting the pressure relief device 9 and the portion 2d portion for mounting the on-load tap changer 11. are provided with protective plates 15 and 16, respectively, for guiding the gas bubbles B to escape. At this time, the protection plates 15 and 16 can change the flow of the rising gas bubbles B or block them, thereby preventing the gas bubbles B from reaching the mounting holes 2b and 2d. Thereby, the gas bubbles B can be collected in the gas collecting portion 10a of the Buchholz relay 10, and the Buchholz relay 10 can be operated correctly.

このような本実施形態によれば、本体タンク２の上部にガス検出装置としてのブッフホルツ継電器１０を備えたものにあって、防御板１５、１６を設けたことにより、発生したガスが取付用の穴２ｂ、２ｄ部分に溜まることを防止でき、本体タンク２の内部で発生するガスをブッフホルツ継電器１０によって効果的に検出することができるという優れた効果を得ることができる。 According to this embodiment, the Buchholz relay 10 as a gas detection device is provided on the upper part of the main body tank 2, and the protection plates 15 and 16 are provided to prevent the generated gas from It is possible to prevent gas from accumulating in the holes 2b and 2d, and the Buchholz relay 10 can effectively detect the gas generated inside the body tank 2, which is an excellent effect.

特に本実施形態では、本体タンク２の上壁部に放圧装置９を設けたものにあって、底面及び開口部１５ａを有する側面を有し、前記放圧装置９に下方から被せられるように配置される箱状の第１の防御板１５を設けた。このとき、放圧装置９が受圧部９ａを有する構造上、その下面側を塞ぐことはできないが、第１の防御板１５の部分的に開放した側面によって、放圧装置９の下面の受圧部９ａに対する絶縁油Ｍの流通が可能となる。これにより、箱状の第１の防御板１５の内部、外部間での絶縁油Ｍの流通を確保しながら、第１の防御板１５の底面部分でガスの気泡Ｂを堰き止めて流れを変えることができる。 In particular, in this embodiment, the pressure relief device 9 is provided on the upper wall portion of the main body tank 2, and has a bottom surface and a side surface having an opening 15a so as to cover the pressure relief device 9 from below. A box-shaped first protection plate 15 is provided. At this time, due to the structure of the pressure release device 9 having the pressure receiving portion 9a, the lower surface side thereof cannot be blocked, but the partially opened side surface of the first protection plate 15 allows the pressure receiving portion on the lower surface of the pressure release device 9 to be closed. Insulating oil M can be circulated to 9a. As a result, while securing the flow of the insulating oil M between the inside and the outside of the box-shaped first protection plate 15, the bottom surface of the first protection plate 15 dams up the bubbles B of the gas to change the flow. be able to.

更に本実施形態では、本体タンク２の上壁部に負荷時タップ切換器１１を設けたものにあって、負荷時タップ切換器１１の周囲を囲む枠状の第２の防御板１５を設けた。負荷時タップ切換器１１を取付ける際の穴２ｄ部分において、ガス溜りとなる虞のある隙間が形成される事情があっても、その隙間を塞ぐようにリング状の第２の防御板１６が配置されるので、ガスの気泡Ｂを第２の防御板１６の外周面に沿って流すことができ、ガスが隙間分に溜まることを防止することができる。 Further, in this embodiment, the on-load tap changer 11 is provided on the upper wall of the main tank 2, and a frame-shaped second protection plate 15 surrounding the on-load tap changer 11 is provided. . A second ring-shaped protective plate 16 is arranged so as to close the gap even if there is a gap formed in the hole 2d where the on-load tap changer 11 is mounted, which may become a gas pool. Therefore, the gas bubbles B can flow along the outer peripheral surface of the second protection plate 16, and the gas can be prevented from accumulating in the gap.

尚、上記実施形態では、ガス検出装置としてブッフホルツ継電器１０を採用するようにしたが、例えばガス検出継電器等であっても良い。また、上記実施形態では、付属部品として、放圧装置９及び負荷時タップ切換器１１の双方を備えたものとしたが、いずれか一方のみを備える構成であっても良い。それ以外の付属部品、例えば計器類等についても、同様に防御板を設けることができる。ガス検出装置や付属部品を設ける位置としても、様々な変更が可能である。 In the above embodiment, the Buchholz relay 10 is used as the gas detection device, but for example, a gas detection relay or the like may be used. In the above embodiment, both the pressure relief device 9 and the on-load tap changer 11 are provided as accessory parts, but only one of them may be provided. Protective plates can be similarly provided for other attachments, such as gauges. Various changes are also possible for the positions at which the gas detection device and accessories are provided.

上記実施形態では、絶縁油Ｍとして、鉱油を例にあげたが、鉱油以外の絶縁油全般や液体シリコーン等であっても良い。変圧器の全体的な構成としても、例えば絶縁油Ｍを放熱器に対し強制循環させるための循環用ポンプや、強制冷却用のファン装置等を有するものであっても良い等、様々な変更が可能である。コンサベータとしても、開放式のものであっても良い。その他、静止誘導機器としては、変圧器に限らず、例えばリアクトルに適用することもできる。 In the above embodiment, the insulating oil M is exemplified by mineral oil, but general insulating oils other than mineral oil, liquid silicone, and the like may also be used. As for the overall configuration of the transformer, various modifications may be made, such as a circulating pump for forcibly circulating the insulating oil M to the radiator, a fan device for forced cooling, and the like. It is possible. As a conservator, it may be of an open type. In addition, static induction devices are not limited to transformers, and can be applied to reactors, for example.

以上のように、本発明の一実施形態を説明したが、この実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。 While one embodiment of the invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

図面中、１は油入変圧器（油入静止誘導機器）、２は本体タンク、２ｂ、２ｄは取付用の穴、３は変圧器本体（誘導機器本体）、７はタンクカバー、９は放圧装置（付属部品）、９ａは受圧部、１０はブッフホルツ継電器（ガス検出装置）、１１は負荷時タップ切換器、１５は第１の防御板、１６は第２の防御板、Ｍは絶縁油を示す。 In the drawing, 1 is the oil-filled transformer (oil-filled static induction device), 2 is the body tank, 2b and 2d are mounting holes, 3 is the transformer body (induction device body), 7 is the tank cover, 9 is the discharge Pressure device (attached part), 9a is a pressure receiving part, 10 is a Buchholz relay (gas detection device), 11 is an on-load tap changer, 15 is a first protection plate, 16 is a second protection plate, and M is insulating oil. indicates

Claims (1)

誘導機器本体が収容されると共に絶縁油が充填される本体タンクと、
前記本体タンクの上部に配置され内部で発生したガスを検出するガス検出装置と、
前記本体タンクの上壁部に取付用の穴を開けた状態で取付けられるものであって、放圧装置及び負荷時タップ切換器を含む付属部品と、
前記本体タンクの上壁部内面側に設けられ、該本体タンク内で発生したガスの気泡が前記付属部品の取付用の穴から逸れるように案内するための防御板とを備え、
前記防御板は、前記放圧装置に下方から被せられるように配置される上面が開口した矩形箱状をなし、底面を有すると共に及び側面のうち対向する２面の上辺部を除く位置に部分的に開放した開口部を有して構成された第１の防御板と、
前記負荷時タップ切換器の周囲を囲むリング板状に構成された第２の防御板とを含んでいる油入静止誘導機器。 a main body tank in which the induction device main body is accommodated and which is filled with insulating oil;
a gas detection device arranged on the upper part of the main body tank for detecting gas generated inside;
Attached parts including a pressure relief device and an on-load tap changer, which are attached to the upper wall of the main body tank with an attachment hole opened;
a protection plate provided on the inner surface of the upper wall portion of the main body tank for guiding gas bubbles generated in the main body tank so as to deviate from the hole for mounting the accessory ,
The protection plate has a rectangular box shape with an open top and is arranged to cover the pressure release device from below. a first guard plate configured with an opening open to;
an oil-filled static induction device, comprising: a second protection plate configured in the shape of a ring plate surrounding the on-load tap changer ;
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