JP2020072118A - Transformer - Google Patents

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JP2020072118A
JP2020072118A JP2018202902A JP2018202902A JP2020072118A JP 2020072118 A JP2020072118 A JP 2020072118A JP 2018202902 A JP2018202902 A JP 2018202902A JP 2018202902 A JP2018202902 A JP 2018202902A JP 2020072118 A JP2020072118 A JP 2020072118A
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test piece
transformer
coil
assembly
iron core
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辰則 佐藤
Tatsunori Sato
辰則 佐藤
諒介 御子柴
Ryosuke Mikoshiba
諒介 御子柴
亮佑 杉田
Ryosuke Sugita
亮佑 杉田
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Hitachi Industrial Equipment Systems Co Ltd
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Hitachi Industrial Equipment Systems Co Ltd
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Abstract

To provide a transformer in which an iron core-coil assembly such as an oil-filled transformer is housed in a tank, and it is easy to take out a test piece during a deterioration diagnosis test, and the accuracy of deterioration diagnosis is improved.SOLUTION: A transformer includes an iron core-coil assembly including an iron core 1 and a coil 2 wound around the iron core 1, a tank 3 including the iron core-coil assembly, and a cover 5 that closes the top of the tank 3. Inside the coil 2, a test piece assembly 8 having a test piece insulating paper made of the same material as an insulator of the coil 2 is attached, and the test piece assembly 8 is attached with a test piece electric wire 11 which goes to the cover 5, and the test piece assembly 8 can be taken out of the tank 3 by the test piece electric wire 11.SELECTED DRAWING: Figure 1

Description

本発明は、変圧器の劣化診断技術に関する。   The present invention relates to a deterioration diagnosis technique for a transformer.

変圧器の劣化診断を行う方法として、変圧器内で使用されている絶縁物を採取し、その平均重合度や引張強度を測定することで変圧器の劣化状態を分析する方法が知られている。   As a method of diagnosing the deterioration of a transformer, a method is known in which the insulator used in the transformer is sampled and the deterioration state of the transformer is analyzed by measuring the average degree of polymerization and tensile strength. ..

変圧器の劣化診断装置の一例として、特許文献１には、「油入変圧器の巻線に巻回される絶縁紙と同種の紙材からなるテープ状の試験片と、一軸方向に引張荷重を付加した状態で、この試験片を保持する引張手段と、前記試験片が破断したことを検出して電気信号を発する破断検出手段と、を備え、前記試験片が取り付けられた前記引張手段は、油入変圧器が収納されるタンク内の上部に設置されることを特徴とする油入変圧器の劣化診断装置。」（請求項１参照）が開示されている。   As an example of a deterioration diagnosis device for a transformer, Patent Document 1 discloses "a tape-shaped test piece made of a paper material of the same type as an insulating paper wound around a winding of an oil-filled transformer, and a uniaxial tensile load. In the state of adding, a pulling means for holding this test piece, and a breakage detecting means for emitting an electric signal by detecting that the test piece is broken, the pulling means to which the test piece is attached, , A deterioration diagnosis device for an oil-filled transformer, which is installed in an upper portion of a tank in which the oil-filled transformer is housed. ”(Claim 1).

また、特許文献２には、「モールド変圧器の劣化診断方法」として、絶縁性測定用部材をモールドコイル中に着脱可能に装着しておき、劣化診断時に、該絶縁性測定用部材をモールドコイルから取り出して、該絶縁性測定用部材の絶縁破壊電圧など絶縁性能を測定し、該測定結果に基づき、モールドコイルの劣化状態を評価することが、開示されている。（要約参照）   Further, in Patent Document 2, as a "deterioration diagnosis method for a mold transformer", an insulation measuring member is detachably mounted in a mold coil, and at the time of deterioration diagnosis, the insulation measuring member is molded coil. It is disclosed that the insulating coil is taken out from the test piece, the insulation performance such as the dielectric breakdown voltage of the insulation measuring member is measured, and the deterioration state of the mold coil is evaluated based on the measurement result. (See summary)

特開２０１２−１６０６７０号公報JP, 2012-160670, A 特開２００７−２８１２７５号公報JP, 2007-281275, A

特許文献１などに見られる従来の劣化診断用絶縁物の配置を、図６に示す。従来の変圧器の劣化診断方法では、変圧器タンク３内の上部の、コイル２と離れた位置の試験片格納スペース６に劣化診断用絶縁物である試験片７を配置し、試験片７の劣化状態を判断していた。この方法の場合、変圧器タンク内の上部とコイル間の温度差による絶縁物の劣化進行の差により、測定結果に補正をかけたとしても誤差が発生してしまう。そのため、変圧器内部の最高温度部の絶縁物を直接採取した場合と比べて、変圧器の劣化診断結果の精度が下がってしまうという課題がある。   FIG. 6 shows the arrangement of a conventional insulation material for deterioration diagnosis found in Patent Document 1 and the like. In the conventional method of diagnosing deterioration of a transformer, a test piece 7 as a deterioration diagnosing insulator is arranged in a test piece storage space 6 at a position apart from the coil 2 in an upper part of the transformer tank 3, and The deterioration state was judged. In the case of this method, an error will occur even if the measurement result is corrected due to the difference in the progress of deterioration of the insulator due to the temperature difference between the upper portion in the transformer tank and the coil. Therefore, there is a problem that the accuracy of the deterioration diagnosis result of the transformer is reduced as compared with the case where the insulator of the highest temperature portion inside the transformer is directly sampled.

また、特許文献２には、モールドコイル中に絶縁性測定用部材を装着することが開示されているが、鉄心−コイル組立体がタンクに収容されていないモールド変圧器に関する技術であって、油入変圧器などの鉄心−コイル組立体がタンクに収容されている変圧器に適用することは考慮されていない。   Further, Patent Document 2 discloses mounting an insulating measuring member in a mold coil, but it is a technique relating to a mold transformer in which an iron core-coil assembly is not housed in a tank. It is not considered to apply an iron core-coil assembly such as an input transformer to a transformer housed in a tank.

本発明は、油入変圧器などの鉄心−コイル組立体がタンクに収容されている変圧器において、劣化診断試験時に試験片の取り出しが容易で、劣化診断の精度が向上した変圧器を提供することを目的とする。   The present invention provides a transformer in which an iron core-coil assembly such as an oil-filled transformer is housed in a tank, in which a test piece can be easily taken out during a deterioration diagnosis test, and the accuracy of deterioration diagnosis is improved. The purpose is to

上記課題を解決するための、本発明の「変圧器」の一例を挙げるならば、
鉄心と前記鉄心に巻回されたコイルから構成される鉄心−コイル組立体と、前記鉄心−コイル組立体を収容するタンクと、前記タンクの上部を塞ぐカバーとを備える変圧器であって、前記コイル内には、前記コイルの絶縁物と同一材料から成る試験片絶縁紙を有する試験片組立品が取り付けられ、前記試験片組立品には、前記カバーへ向かう線状部材が取り付けられ、前記試験片組立品は、前記線状部材により前記タンク外へ取り出し可能であるものである。 In order to solve the above problems, an example of the "transformer" of the present invention will be given.
A transformer comprising an iron core-a coil assembly including an iron core and a coil wound around the iron core, a tank that houses the iron core-coil assembly, and a cover that closes an upper portion of the tank. A test piece assembly having a test piece insulating paper made of the same material as the coil insulator is attached in the coil, and a linear member facing the cover is attached to the test piece assembly, The piece assembly can be taken out of the tank by the linear member.

本発明によれば、油入変圧器などの鉄心−コイル組立体がタンクに収容されている変圧器において、劣化診断試験時に試験片の取り出しが容易となる。そして、コイル内の最高温度箇所、つまり絶縁紙の最も劣化している箇所から試験片を採取することが可能となるため、劣化診断の精度が向上した変圧器を提供することができる。   According to the present invention, in a transformer in which an iron core-coil assembly such as an oil-filled transformer is housed in a tank, a test piece can be easily taken out during a deterioration diagnosis test. Further, since it becomes possible to collect the test piece from the highest temperature location in the coil, that is, the location where the insulating paper is most deteriorated, it is possible to provide a transformer with improved accuracy of deterioration diagnosis.

実施例１の劣化診断補助機能を有する変圧器の一例を示した図である。It is a figure showing an example of a transformer which has a deterioration diagnosis auxiliary function of Example 1. 実施例１の試験片組立品の一例を示した図である。3 is a diagram showing an example of a test piece assembly of Example 1. FIG. 実施例１のコイルに試験片組立品を取り付けた図である。It is the figure which attached the test piece assembly to the coil of Example 1. 実施例２の劣化診断機能を有する変圧器の一例を示した図である。It is the figure which showed an example of the transformer which has the deterioration diagnostic function of Example 2. 実施例２の試験片組立品の一例を示した図である。FIG. 6 is a diagram showing an example of a test piece assembly of Example 2. 従来の劣化診断補助機能を有する変圧器の一例を示した図である。It is the figure which showed an example of the transformer which has the conventional deterioration diagnosis assistance function.

以下、本発明の実施例を、図面を用いて説明する。なお、実施例を説明するための各図において、同一の構成要素には同一の名称、符号を付して、その繰り返しの説明を省略する。   Embodiments of the present invention will be described below with reference to the drawings. In each of the drawings for explaining the embodiments, the same components are designated by the same names and reference numerals, and repeated description thereof will be omitted.

図１に、実施例１の劣化診断補助機能を有する変圧器の一例を示す。鉄心１と鉄心１に巻回されたコイル２から構成される鉄心−コイル組立体がタンク（容器）３内に収容され、タンク内には鉄心−コイル組立体を覆うように絶縁油４が満たされている。そして、タンク３はカバー５で密封されている。   FIG. 1 shows an example of a transformer having a deterioration diagnosis assisting function of the first embodiment. An iron core-coil assembly including an iron core 1 and a coil 2 wound around the iron core 1 is housed in a tank (container) 3, and the tank is filled with insulating oil 4 so as to cover the iron core-coil assembly. Has been done. The tank 3 is sealed by the cover 5.

後で詳述するように、コイル２には試験片組立品８が配置され、試験片組立品８は、カバー５に設けたハンドホール１４に試験片電線１１で接続されている。   As described later in detail, the test piece assembly 8 is arranged on the coil 2, and the test piece assembly 8 is connected to the handhole 14 provided in the cover 5 by the test piece electric wire 11.

図２に、絶縁の施された電線、絶縁紙、絶縁テープを用いて作成した劣化診断用の試験片組立品８を示す。図２（ａ）は試験片組立品の正面図、図２（ｂ）は側面図である。平角線またはリボン線である試験片電線１１を１８０°折り曲げ、その折り曲げた隙間に試験片絶縁紙１０をはさみ込む。そして、それらの複数個所を絶縁テープ９で固定し、試験片組立品８とする。図２の試験片組立品では、試験片電線を１８０°折り曲げ、その折り曲げた隙間に試験片絶縁紙をはさみ込んでいるので、試験片絶縁紙の劣化が進んで破損していても、取り出すことができる。   FIG. 2 shows a test piece assembly 8 for deterioration diagnosis, which is made by using an insulated wire, insulating paper, and insulating tape. 2 (a) is a front view of the test piece assembly, and FIG. 2 (b) is a side view. The test piece electric wire 11 which is a rectangular wire or a ribbon wire is bent by 180 °, and the test piece insulating paper 10 is inserted into the bent gap. Then, a plurality of these parts are fixed with an insulating tape 9 to form a test piece assembly 8. In the test piece assembly of Fig. 2, the test piece electric wire is bent 180 ° and the test piece insulating paper is sandwiched between the bent gaps. Therefore, even if the test piece insulating paper is damaged due to deterioration, You can

図３に、試験片組立品８をコイル２に取り付けた状態を示す。図３（ａ）はコイルの平面図、図３（ｂ）はコイルの正面図である。コイル製作時において、最外装に棒ダクト１２を取り付けるタイミングで、その棒ダクトの間に製作した試験片組立品８を取り付ける。棒ダクト１２を取り付けることで、棒ダクトの間に油の流路を形成し、冷却を行うことができる。そして、その上から外装絶縁紙１３を巻き付けることで、試験組立品８がコイルから外れてしまうことを防止する。   FIG. 3 shows a state in which the test piece assembly 8 is attached to the coil 2. 3A is a plan view of the coil, and FIG. 3B is a front view of the coil. When manufacturing the coil, the test piece assembly 8 manufactured between the rod ducts is mounted at the timing of mounting the rod duct 12 on the outermost casing. By attaching the rod ducts 12, it is possible to form an oil flow path between the rod ducts and perform cooling. Then, by winding the outer insulating paper 13 from above, the test assembly 8 is prevented from coming off the coil.

他の方法としては、コイル製作後に、試験片組立品８を楔等の治具を用いてコイルに挿入してもよい。   Alternatively, after the coil is manufactured, the test piece assembly 8 may be inserted into the coil using a jig such as a wedge.

コイル２に取り付ける試験片組立品８の数を複数個所、複数個数とすることで、複数個所、複数回の変圧器の劣化診断を行うことが可能となる。   By setting the number of test piece assemblies 8 to be attached to the coil 2 at a plurality of locations, a plurality of locations can be used to perform a deterioration diagnosis of the transformer at a plurality of locations.

コイル２と鉄心１を組み合わせた鉄心−コイル組立体をタンク３に収容し、試験片電線１１をカバー５に取り付ける段階で、試験片電線１１の端部をカバー上５に設置されているハンドホール１４へ取り付ける。この状態を図１に示す。ハンドホール１４は、タンクの中の確認や、トランスの電圧等の切り替えなどに用いられる。本実施例ではハンドホール１４に試験片電線１１の端部を取り付けているが、この試験片電線１１の端部はハンドホール以外の、例えばカバー付属の変圧器中身吊耳等の別部品に取り付けてもよい。   A hand hole in which the end of the test piece electric wire 11 is installed on the cover 5 at the stage of accommodating the iron core-coil assembly in which the coil 2 and the iron core 1 are combined in the tank 3 and attaching the test piece electric wire 11 to the cover 5. Attach to 14. This state is shown in FIG. The hand hole 14 is used for checking the inside of the tank, switching the voltage of the transformer, and the like. In the present embodiment, the end portion of the test piece electric wire 11 is attached to the handhole 14, but the end portion of the test piece electric wire 11 is attached to another part other than the handhole, for example, a transformer inside hanging ear attached to the cover. You may.

変圧器の劣化診断を行う際には、まずハンドホール１４を取り外す。そして、試験片電線１１を用いて試験片組立品８をコイル２内部から引っ張りあげ、試験片絶縁紙１０を変圧器内部から取り出す。そして、取り出された試験片絶縁紙１０の重合度や引張強度を測定器で測定し分析することで変圧器の劣化具合を診断する。   When diagnosing the deterioration of the transformer, the handhole 14 is first removed. Then, the test piece assembly 8 is pulled from the inside of the coil 2 using the test piece electric wire 11, and the test piece insulating paper 10 is taken out from the inside of the transformer. Then, the degree of deterioration of the transformer is diagnosed by measuring and analyzing the degree of polymerization and tensile strength of the taken-out test piece insulating paper 10 with a measuring instrument.

一般に、変圧器で使用されるコイルの最高温度の箇所はコイルの上端部となる。本実施例では、このコイル内のコイル上端部にも位置するかたちで劣化診断用試験片である絶縁物を配置するので、絶縁紙の劣化が最も進むコイル内の最高温度箇所の絶縁物を取り出すことが可能となり、正確な変圧器の劣化診断結果を得ることができる。   Generally, the highest temperature point of the coil used in the transformer is the upper end of the coil. In this embodiment, since the insulator which is the test piece for deterioration diagnosis is arranged in the coil upper end portion in this coil, the insulator at the highest temperature point in the coil where the deterioration of the insulating paper is most advanced is taken out. Therefore, it is possible to obtain accurate deterioration diagnosis results of the transformer.

本実施例によれば、コイル内の最高温度箇所、つまり絶縁紙の最も劣化している箇所から試験片を採取することが可能となるため、劣化診断の精度が向上した変圧器を提供することができる。また、試験品組立品に接続した試験片電線をハンドホール等に取り付けているので、油入変圧器などの鉄心−コイル組立体がタンクに収容されている変圧器において、試験片の取り出しが容易となる。   According to the present embodiment, it is possible to collect a test piece from the highest temperature point in the coil, that is, the most deteriorated point of the insulating paper, and therefore to provide a transformer with improved deterioration diagnosis accuracy. You can In addition, since the test piece wire connected to the test piece assembly is attached to the handhole etc., it is easy to take out the test piece in the transformer in which the iron core-coil assembly such as the oil-filled transformer is housed in the tank. Becomes

図４に、実施例２の劣化診断補助機能を有する変圧器の一例を示す。実施例２の変圧器は、試験片組立品８の構成を変えるとともに、絶縁紙に引張力を加える絶縁紙引張装置を設けたものである。   FIG. 4 shows an example of a transformer having a deterioration diagnosis assisting function of the second embodiment. The transformer of the second embodiment has a structure in which the test piece assembly 8 is changed and an insulating paper tension device for applying a tensile force to the insulating paper is provided.

図５に、実施例２の劣化診断用の試験片組立品を示す。図５（ａ）は試験片組立品の正面図、図５（ｂ）は側面図である。試験片組立品８は、リボン状の試験片絶縁紙１０の上端に線状部材１５を取り付けて構成される。   FIG. 5 shows a test piece assembly for deterioration diagnosis according to the second embodiment. 5 (a) is a front view of the test piece assembly, and FIG. 5 (b) is a side view. The test piece assembly 8 is constructed by attaching a linear member 15 to the upper end of a ribbon-shaped test piece insulating paper 10.

コイル製作時において、コイル２の最外装に試験片組立品８を取り付け、その上から外装絶縁紙を巻き付けることで、試験組立品がコイルから外れることを防止する。   When the coil is manufactured, the test piece assembly 8 is attached to the outermost part of the coil 2, and the outer insulating paper is wound on the outermost part of the test piece assembly 8 to prevent the test assembly from coming off the coil.

図４に示すように、コイル２と鉄心１を組み合わせた鉄心−コイル組立体をタンク３に収容し、線状部材１５をカバー５に設けた絶縁紙引張装置１６へ取り付ける。   As shown in FIG. 4, the iron core-coil assembly in which the coil 2 and the iron core 1 are combined is housed in the tank 3, and the linear member 15 is attached to the insulating paper tensioning device 16 provided in the cover 5.

絶縁紙引張装置１６により線状部材１５を介して試験片絶縁紙１０に引張力を加えて、引っ張りによる絶縁紙の破断を検知することにより、絶縁紙の劣化を検知することができる。また、線状部材１５により試験片絶縁紙１０を引き上げて、重合度測定などの劣化診断を行うことができる。   Degradation of the insulating paper can be detected by applying a tensile force to the test piece insulating paper 10 via the linear member 15 by the insulating paper tensioning device 16 and detecting breakage of the insulating paper due to pulling. In addition, the test piece insulating paper 10 can be pulled up by the linear member 15 to perform deterioration diagnosis such as polymerization degree measurement.

本実施例によれば、試験片絶縁紙を取り出しての重合度測定等の劣化診断に加えて、引張強度評価による劣化診断も行うことができる。   According to this embodiment, in addition to the deterioration diagnosis such as the measurement of the degree of polymerization after taking out the test piece insulating paper, the deterioration diagnosis by the tensile strength evaluation can be performed.

なお、上記各実施例では、油入変圧器について説明したが、本発明は、油入変圧器に限らず、鉄心−コイル組立体がタンク（容器）に収容されている変圧器一般について適用することができる。   In addition, although the oil-filled transformer has been described in each of the above-described embodiments, the present invention is not limited to the oil-filled transformer and is applied to general transformers in which the iron core-coil assembly is housed in the tank (container). be able to.

１…鉄心
２…コイル
３…タンク（容器）
４…絶縁油
５…カバー
６…従来の試験片格納スペース
７…従来の絶縁紙試験片
８…試験片組立品
９…絶縁テープ
１０…試験片絶縁紙
１１…試験片電線
１２…棒ダクト
１３…外装絶縁紙
１４…ハンドホール
１５…線状部材
１６…絶縁紙引張装置 1 ... Iron core 2 ... Coil 3 ... Tank (container)
4 ... Insulating oil 5 ... Cover 6 ... Conventional test piece storage space 7 ... Conventional insulating paper test piece 8 ... Test piece assembly 9 ... Insulating tape 10 ... Test piece insulating paper 11 ... Test piece electric wire 12 ... Rod duct 13 ... Exterior insulating paper 14 ... Hand hole 15 ... Linear member 16 ... Insulating paper tensioning device

Claims (11)

鉄心と前記鉄心に巻回されたコイルから構成される鉄心−コイル組立体と、前記鉄心−コイル組立体を収容するタンクと、前記タンクの上部を塞ぐカバーとを備える変圧器であって、
前記コイル内には、前記コイルの絶縁物と同一材料から成る試験片絶縁紙を有する試験片組立品が取り付けられ、
前記試験片組立品には、前記カバーへ向かう線状部材が取り付けられ、
前記試験片組立品は、前記線状部材により前記タンク外へ取り出し可能である変圧器。 A transformer comprising an iron core and an iron core-coil assembly composed of a coil wound around the iron core, a tank that houses the iron core-coil assembly, and a cover that closes an upper portion of the tank.
A test piece assembly having a test piece insulating paper made of the same material as the insulator of the coil is mounted in the coil,
The test piece assembly has a linear member attached to the cover,
The test piece assembly is a transformer that can be taken out of the tank by the linear member. 請求項１に記載の変圧器において、
前記試験片組立品は、前記コイルへの通電により最も温度が上昇する場所に取り付けられていることを特徴とする変圧器。 The transformer according to claim 1,
The transformer, wherein the test piece assembly is attached to a place where the temperature rises most when the coil is energized. 請求項１に記載の変圧器において、
前記コイルには、最外装に複数の棒ダクトが取り付けられ、
前記棒ダクトの間に、前記試験片組立品が取り付けられていることを特徴とする変圧器。 The transformer according to claim 1,
A plurality of rod ducts are attached to the outermost part of the coil,
A transformer, wherein the test piece assembly is mounted between the rod ducts. 請求項１に記載の変圧器において、
前記試験片組立品は、前記コイルの複数個所に取り付けられていることを特徴とする変圧器。 The transformer according to claim 1,
The transformer, wherein the test piece assembly is attached to a plurality of places of the coil. 請求項１に記載の変圧器において、
前記試験片組立品は、試験片電線を１８０°折り返し、その折り返した隙間に前記試験片絶縁紙をはさみ込み、絶縁テープで固定したものであることを特徴とする変圧器。 The transformer according to claim 1,
The test piece assembly is a transformer in which a test piece electric wire is folded back by 180 °, the test piece insulating paper is sandwiched between the folded back gaps, and fixed with an insulating tape. 請求項５に記載の変圧器において、
前記試験片電線は、平角線またはリボン線であることを特徴とする変圧器。 The transformer according to claim 5,
The said test piece electric wire is a rectangular wire or a ribbon wire, The transformer characterized by the above-mentioned. 請求項１に記載の変圧器において、
前記試験片組立品は、リボン状の試験片絶縁紙の上端に線状部材を取り付けたものであることを特徴とする変圧器。 The transformer according to claim 1,
The test piece assembly is a transformer in which a linear member is attached to an upper end of a ribbon-shaped test piece insulating paper. 請求項１に記載の変圧器において、
前記試験片組立品は、リボン状の試験片絶縁紙の上端に線状部材を取り付けたものであり、
前記試験片絶縁紙は、前記コイルに取り付けられ、
前記線状部材の他端は、前記カバーに設けた絶縁紙引張装置に取り付けられていることを特徴とする変圧器。 The transformer according to claim 1,
The test piece assembly is one in which a linear member is attached to the upper end of a ribbon-shaped test piece insulating paper,
The test piece insulating paper is attached to the coil,
The other end of the linear member is attached to an insulating paper tensioning device provided on the cover. 請求項８に記載の変圧器において、
前記試験片絶縁紙の破断を検知することにより、絶縁劣化を診断することを特徴とする変圧器。 The transformer according to claim 8,
A transformer characterized by diagnosing insulation deterioration by detecting breakage of the test piece insulating paper. 請求項１に記載の変圧器において、
前記タンクには、前記鉄心−コイル組立体を覆うように絶縁油が満たされていることを特徴とする変圧器。 The transformer according to claim 1,
A transformer, wherein the tank is filled with insulating oil so as to cover the iron core-coil assembly. 鉄心と、前記鉄心に巻線が巻回されたコイルと、前記鉄心と前記コイルとを覆う絶縁油と、前記絶縁油を覆うタンクと、前記タンクの上部に接続されるカバーと、を有する変圧器であって、
前記コイルは巻線の層間に空隙が設けられており、
前記空隙には、絶縁部材を用いた試験片が配置され、
前記試験片には、前記カバーから前記コイルの空隙に向かう線状部材に接続され、
前記カバーは、前記線状部材または前記試験片を引き抜く窓部が設けられたこと
を特徴とする油入変圧器。 Transformer having an iron core, a coil having a winding wound around the iron core, insulating oil covering the iron core and the coil, a tank covering the insulating oil, and a cover connected to an upper portion of the tank. A vessel,
The coil has a gap between the layers of the winding,
The void, a test piece using an insulating member is arranged,
The test piece is connected to a linear member extending from the cover to the void of the coil,
The oil-immersed transformer, wherein the cover is provided with a window portion through which the linear member or the test piece is pulled out.
JP2018202902A 2018-10-29 2018-10-29 Transformer Ceased JP2020072118A (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN114660429A (en) * 2022-05-19 2022-06-24 保定天威保变电气股份有限公司 Device and method for testing insulation strength between transformer coil sections

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JPS60210813A (en) * 1984-04-05 1985-10-23 Toshiba Corp Oil-immersed electric apparatus
JPH02197106A (en) * 1989-01-26 1990-08-03 Toshiba Corp Foil-wound transformer
JPH1074628A (en) * 1996-06-28 1998-03-17 Hitachi Ltd Method and apparatus for electric device deterioration diagnosis
JP2003289008A (en) * 2002-03-28 2003-10-10 Daihen Corp Deterioration diagnostic device for oil-immersed transformer
JP2008294363A (en) * 2007-05-28 2008-12-04 Mitsubishi Electric Corp Resin molded transformer
JP2010177308A (en) * 2009-01-28 2010-08-12 Chugoku Electric Power Co Inc:The Device for simulating deterioration of transformer insulating paper
JP2012160670A (en) * 2011-02-02 2012-08-23 Chugoku Electric Power Co Inc:The Deterioration diagnosis device of oil-immersed transformer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60210813A (en) * 1984-04-05 1985-10-23 Toshiba Corp Oil-immersed electric apparatus
JPH02197106A (en) * 1989-01-26 1990-08-03 Toshiba Corp Foil-wound transformer
JPH1074628A (en) * 1996-06-28 1998-03-17 Hitachi Ltd Method and apparatus for electric device deterioration diagnosis
JP2003289008A (en) * 2002-03-28 2003-10-10 Daihen Corp Deterioration diagnostic device for oil-immersed transformer
JP2008294363A (en) * 2007-05-28 2008-12-04 Mitsubishi Electric Corp Resin molded transformer
JP2010177308A (en) * 2009-01-28 2010-08-12 Chugoku Electric Power Co Inc:The Device for simulating deterioration of transformer insulating paper
JP2012160670A (en) * 2011-02-02 2012-08-23 Chugoku Electric Power Co Inc:The Deterioration diagnosis device of oil-immersed transformer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114660429A (en) * 2022-05-19 2022-06-24 保定天威保变电气股份有限公司 Device and method for testing insulation strength between transformer coil sections

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