JP2008112836A - Transformer for gas insulated meter - Google Patents

Transformer for gas insulated meter Download PDF

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Publication number
JP2008112836A
JP2008112836A JP2006294460A JP2006294460A JP2008112836A JP 2008112836 A JP2008112836 A JP 2008112836A JP 2006294460 A JP2006294460 A JP 2006294460A JP 2006294460 A JP2006294460 A JP 2006294460A JP 2008112836 A JP2008112836 A JP 2008112836A
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conductor
tank
transformer
conductive
gas
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Naoto Yamamoto
直人 山本
Kazuhiro Nakasaki
一弘 中崎
Yasunobu Doi
康信 土井
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a transformer for a gas insulated meter of which the diameter of an insulation rod is decreased, dispensing with a flexible conductor for forming a conductive path, for a simplified potential path. <P>SOLUTION: The transformer comprises an outer end part which is hermetically fitted to an opening part of a tank, a penetrating conductor having an inner end part which is guided into the tank, split type electric field relaxing high pressure shields which are connected with each other and fitted annularly to a high voltage coil, a conductive rotational support which is rotatably provided to any one of split parts of the split type electric field relaxing high pressure shields, a movable conductor whose one end part is provided to the conductive rotational support and whose the other end is arranged to the inner end part of the penetrating conductor for free conducting and separating, an insulation rod which rotatably penetrates the tank airtight and whose conductive end part is fitted to the conductive rotational support, and a rotary operation mechanism for operating contacting/separating action of the movable conductor by rotary operation of the insulation rod. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、高電圧回路の電圧測定に用いられるガス絶縁計器用変圧器に関するものである。   The present invention relates to a transformer for gas insulation instrument used for voltage measurement of a high voltage circuit.

発電所や変電所などの電力設備においては、近年ますます高電圧化が進められている。このような電力設備においては、電気機器の絶縁故障を防ぎ、電力の安定供給の観点から、電気機器の絶縁性能の向上が大きな課題となっている。このため近年では、従来の大気圧空気による気中絶縁方式に代わって絶縁性能の優れた絶縁ガスにより絶縁を施したガス絶縁電気機器が多く用いられるようになってきている。このようなガス絶縁電気機器を備えた電力系統回路のような高電圧回路を流れる電気量の内、高電圧測定に用いられる計器用変圧器もガス絶縁を採用したガス絶縁計器用変圧器が用いられるようになってきている。
このようなガス絶縁計器用変圧器は、一般的に一次側の高圧コイルを常時高電圧回路に接続し、電圧変成を行って二次側の低圧コイルで高電圧測定を行う。しかしながら、高電圧回路の電力設備、例えばガス絶縁開閉装置などの直流及び交流絶縁試験のような課電試験を行う場合には、過電圧の侵入による故障を防ぐためにガス絶縁計器用変圧器は高電圧回路から電気的に切り離す必要がある。つまり、ガス絶縁計器用変圧器は、高電圧回路に対して電気的な切り離し動作と接続動作とを必要に応じて行える機能を有するように構成されている（特許文献１参照）。 In power facilities such as power plants and substations, higher voltages are being promoted in recent years. In such a power facility, an improvement in the insulation performance of the electrical device is a major issue from the viewpoint of preventing an insulation failure of the electrical device and ensuring a stable supply of power. For this reason, in recent years, instead of the conventional air-insulation method using atmospheric pressure air, gas-insulated electrical equipment that has been insulated with an insulating gas having excellent insulation performance has been increasingly used. Of the quantity of electricity that flows through high-voltage circuits such as power system circuits equipped with such gas-insulated electrical equipment, instrument transformers used for high-voltage measurements are also gas-insulated instrument transformers that employ gas insulation. It is getting to be.
In such a transformer for gas insulated instruments, generally, a primary high voltage coil is always connected to a high voltage circuit, voltage transformation is performed, and a secondary low voltage coil performs high voltage measurement. However, when conducting a voltage test such as DC and AC insulation tests for high-voltage circuit power equipment, such as gas-insulated switchgears, the transformer for gas-insulated instruments is high-voltage to prevent failure due to invasion of overvoltage. Must be electrically disconnected from the circuit. That is, the transformer for gas insulation instrument is configured to have a function of performing electrical disconnection operation and connection operation for the high voltage circuit as required (see Patent Document 1).

特開２００３−２４３２３７号公報（第３−４頁、図１）Japanese Patent Laying-Open No. 2003-243237 (page 3-4, FIG. 1) 特開２００２−３１３６５３号公報JP 2002-313653 A

特許文献１に記載の従来のガス絶縁計器用変圧器は、タンク外に設けられた回転操作機構に主軸、絶縁ロッドを介して回転導体が接続されており、回転操作機構の操作で回転導体を動作させ高電圧回路から接続及び切り離しが行われている。このように回転導体の動作は、絶縁ロッドがタンク側壁の一点で支持された構造で行われるため、絶縁ロッドの機械的強度の確保が必要となり絶縁ロッドの直径が太くなるという問題点があった。又、高圧コイルと回転導体との導電経路を形成するために可撓性導体を設ける必要があった。
この発明は、上述の課題を解決するためになされたもので、絶縁ロッドの細径化を図り、且つ、導電経路を形成するための可撓性導体をなくし電位経路を簡素化することができるガス絶縁計器用変圧器を得るものである。 A conventional gas insulated instrument transformer described in Patent Document 1 has a rotating conductor connected to a rotating operation mechanism provided outside a tank via a main shaft and an insulating rod, and the rotating conductor is operated by operating the rotating operation mechanism. It is operated and connected and disconnected from the high voltage circuit. Thus, since the operation of the rotating conductor is performed with a structure in which the insulating rod is supported at one point on the side wall of the tank, it is necessary to ensure the mechanical strength of the insulating rod, and there is a problem that the diameter of the insulating rod is increased. . In addition, it is necessary to provide a flexible conductor to form a conductive path between the high voltage coil and the rotating conductor.
The present invention has been made to solve the above-mentioned problems, and can reduce the diameter of the insulating rod and can eliminate the flexible conductor for forming the conductive path and simplify the potential path. A transformer for gas insulated instruments is obtained.

この発明に係わるガス絶縁計器用変圧器は、絶縁ガスを封入したタンクに内設された鉄心と、この鉄心に巻回された低圧コイルと、この低圧コイルと同軸的に巻回された高圧コイルとを有する電圧変成要素を備えたガス絶縁計器用変圧器において、
上記タンクの開口部に絶縁スペーサを介して気密に取付けられ、上記タンク外部の回路に接続された外端部、及び上記タンク内に導入される内端部を有する貫通導体、互いに連結され上記高圧コイルに環状に取付けられた分割形電界緩和用高圧シールド、この分割形電界緩和用高圧シールドのいずれかの分割部分に回転自在に設けられた導電性回転支持体、一端部が上記導電性回転支持体に設けられ、他端部が上記貫通導体の内端部と接離自在に配置された可動導体、上記タンクを気密に且つ回転自在に貫通し、導電部を有する一端部が上記導電性回転支持体に取付けられた絶縁ロッド、この絶縁ロッドの回転操作により上記可動導体の接離動作を操作する回転操作機構を備えたものである。 A transformer for gas insulated instrument according to the present invention includes an iron core installed in a tank filled with insulating gas, a low voltage coil wound around the iron core, and a high voltage coil wound coaxially with the low voltage coil. In a gas insulated instrument transformer with a voltage transformer element having
An outer end connected to a circuit outside the tank and an inner end introduced into the tank, which is hermetically attached to the opening of the tank via an insulating spacer, and a through conductor connected to each other, and the high voltage A split-type electric field relaxation high-voltage shield that is annularly attached to the coil, a conductive rotary support rotatably provided at any one of the split-type electric field relaxation high-voltage shields, and one end portion of which is the conductive rotary support A movable conductor provided on the body, the other end of which is disposed so as to be in contact with and away from the inner end of the through conductor, and the tank penetrates the tank in an airtight and rotatable manner, and one end having a conductive portion is the conductive rotation. An insulating rod attached to the support, and a rotation operation mechanism for operating the contact / separation operation of the movable conductor by rotating the insulating rod are provided.

この発明のガス絶縁計器用変圧器によれば、可動導体が接続された絶縁ロッドのタンク貫通部と電界緩和用高圧シールドに設けられた導電性回転支持体との２点で可動導体を支持することにより、絶縁ロッドのタンク貫通部における絶縁ロッドの機械的荷重を分散できるため、絶縁ロッドを細径化することができるという効果がある。
又、導電性回転支持体を設けることにより、この導電性回転支持体と絶縁ロッドの導電部を介し電界緩和用高圧シールドに通じる導電経路を形成できるので、導電経路を形成するための可撓性導体が不要となり、更に、可撓性導体の接続忘れ又は可動導体の接続、切り離し動作による可撓性導体の脱落・断線による導電経路の事故を防止できるので、品質を向上させる効果がある。 According to the gas insulated instrument transformer of the present invention, the movable conductor is supported at two points, that is, the tank penetrating portion of the insulating rod to which the movable conductor is connected and the conductive rotary support provided in the high-voltage shield for electric field relaxation. Thus, since the mechanical load of the insulating rod in the tank penetrating portion of the insulating rod can be dispersed, there is an effect that the diameter of the insulating rod can be reduced.
In addition, by providing a conductive rotating support, a conductive path that leads to the high-voltage shield for electric field relaxation can be formed through the conductive rotating support and the conductive portion of the insulating rod. A conductor is not necessary, and further, it is possible to prevent an accident in the conductive path due to the disconnection or disconnection of the flexible conductor due to forgetting connection of the flexible conductor or connection / disconnection of the movable conductor, thereby improving the quality.

以下、図面に基づいて、この発明の各実施の形態を説明する。
なお、各図間において、同一符号は同一あるいは相当部分を示す。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the drawings, the same reference numerals indicate the same or corresponding parts.

実施の形態１．
図１は、この発明を実施するための実施の形態1におけるガス絶縁計器用変圧器の縦断正面図、図２は、この発明の実施の形態１におけるガス絶縁計器用変圧器の縦断側面図で、図２（ａ）はその全体を示し、図２（ｂ）は、図（ａ）中Ｂ部分を拡大して示した縦断側面図、図３は、図１のIII―III線に沿って切断し矢印方向に見た横断平面図である。 Embodiment 1 FIG.
1 is a longitudinal front view of a gas insulated instrument transformer according to Embodiment 1 for carrying out the present invention, and FIG. 2 is a longitudinal side view of the gas insulated instrument transformer according to Embodiment 1 of the present invention. 2 (a) shows the whole, FIG. 2 (b) is a longitudinal side view showing an enlarged portion B in FIG. 2 (a), and FIG. 3 is taken along the line III-III in FIG. It is the cross-sectional top view cut | disconnected and seen in the arrow direction.

図1〜図３において、タンク１は、接地金属で形成され内部には電圧変成要素６が収納されている。
電圧変成要素６は、タンク１の底板７上に固定された額縁状の鉄心８と、この鉄心８の継鉄部分９に巻回された低圧コイル１０と、その外側に低圧コイル１０と同軸円筒状に巻回され一端が接地された高圧コイル１１とから構成され、タンク１内にはＳＦ６ガスなどの絶縁ガス２１が加圧された状態で封入されている。
又、このタンク１は、上端に開口部２を有し、この開口部２には、この開口部２を気密に閉塞するコーン型の絶縁スペーサ３が取付けられている。
絶縁スペーサ３には、タンク１外部の高電圧回路（図示せず）に接続された外端部４ａとタンク内に導入され内端部４ｂとを有する貫通導体４が気密に貫通し、タンク１内に突出した内端部４ｂの先端には、高圧接触部５が形成されている。高圧接触部５には、後述する可動導体１４の動作を許容するための切欠部５ａが設けられている。 1 to 3, the tank 1 is formed of a ground metal, and a voltage transformation element 6 is accommodated therein.
The voltage transformation element 6 includes a frame-shaped iron core 8 fixed on the bottom plate 7 of the tank 1, a low-voltage coil 10 wound around a yoke portion 9 of the iron core 8, and a low-voltage coil 10 and a coaxial cylinder outside thereof. The high-pressure coil 11 is wound in a shape and grounded at one end, and an insulating gas 21 such as SF6 gas is sealed in the tank 1 in a pressurized state.
Further, the tank 1 has an opening 2 at the upper end, and a cone-type insulating spacer 3 for closing the opening 2 in an airtight manner is attached to the opening 2.
A penetrating conductor 4 having an outer end 4a connected to a high voltage circuit (not shown) outside the tank 1 and an inner end 4b introduced into the tank passes through the insulating spacer 3 in an airtight manner. A high-pressure contact portion 5 is formed at the tip of the inner end portion 4b protruding inward. The high-voltage contact portion 5 is provided with a notch portion 5a for allowing the operation of the movable conductor 14 described later.

高圧コイル１１と貫通導体４間の空間には、直線棒状の可動導体１４が次に述べるように配置されている。すなわち、この可動導体１４は、軸部を形成する一端１４ａが後述する絶縁ロッド１６の金属製の導電端部１６ａにボルト締めで固定され、自由端部である他端部１４ｂが、可動接点のように貫通導体内端部の高圧接触部５に対し接続、切り離し自在（接離自在）に動作する。
高圧コイル１１の外側には、薄板で構成された電界緩和用高圧シールド１２が、高圧コイル１１を囲むよう環状に取付けられる。
電界緩和用高圧シールド１２は、図２（ｂ）に示すように例えば２分割され、その接続部にはそれぞれ取付け板２２ａ、２２ｂが溶接Ｗにより取付けられ、両取付け板２２ａ、２２ｂをボルト２３で接続することにより環状に形成される。
この電界緩和用高圧シールド１２のいずれかの分割部分、すなわち図２（ｂ）では高圧シールド１２の左側に溶接された取付け板２２ａには、例えばボールベアリングよりなる導電性回転支持体１５が回転自在に設けられている。
ボールベアリング１５は、固定側の外輪が取付け板２２ａに固定され、回転側の内輪には、絶縁ロッド１６の内端部であり導電性回転支持体１５の一部を構成する金属製の導電端部１６ａが嵌着されている。 In the space between the high voltage coil 11 and the through conductor 4, a linear bar-shaped movable conductor 14 is arranged as described below. That is, the movable conductor 14 has one end 14a that forms a shaft portion fixed to a metal conductive end portion 16a of an insulating rod 16 described later by bolting, and the other end portion 14b that is a free end portion is connected to a movable contact. Thus, it operates so that it can be connected to and disconnected from the high voltage contact portion 5 at the inner end portion of the through conductor.
On the outside of the high voltage coil 11, an electric field relaxation high voltage shield 12 made of a thin plate is annularly attached so as to surround the high voltage coil 11.
As shown in FIG. 2B, the electric field relaxation high-voltage shield 12 is divided into, for example, two parts, and attachment plates 22a and 22b are attached to the connecting portions by welding W, and both attachment plates 22a and 22b are connected by bolts 23. By connecting, it is formed in an annular shape.
A conductive rotary support 15 made of, for example, a ball bearing is rotatable on any divided portion of the high-voltage shield 12 for electric field relaxation, that is, the mounting plate 22a welded to the left side of the high-voltage shield 12 in FIG. Is provided.
The ball bearing 15 has a fixed outer ring fixed to the mounting plate 22 a, and a rotating side inner ring is a metal conductive end that is an inner end of the insulating rod 16 and forms a part of the conductive rotation support 15. The part 16a is fitted.

絶縁ロッド１６は、上記導電端部１６ａのほかに主軸１７を有し、この主軸１７の部分が回転シール部１８によってタンク１を気密に且つ回転自在に貫通し、導電部側は高圧シールド１２の一部（切欠部）を貫通し導電性回転支持体１５に達している。
更に、この絶縁ロッド１６のタンク外の他端部には、回転操作機構１９が連結され、回転操作機構１９の回転操作により、絶縁ロッド１６、導電性回転支持体１５を介し可動導体１４を動作させることによって高圧接触部５に対する接離動作の操作が行われる。
これにより、絶縁ロッド１６は、タンク１を気密に貫通したタンク貫通部分すなわち回転シール部１８と電界緩和用高圧シールドの接続部に設けられた導電性回転支持体１５とによって２点支持されている。
高圧コイル１１と電界緩和用高圧シールド１２の電気的接続は、電界緩和用高圧シールド１２に設けた穴１２ａから高圧コイル１１のリード線１１ａを出し電界緩和用高圧シールド１２に設けた鋼板にハンダ付け１２ｂすることにより行われている。
これにより、可動導体１４は、絶縁ロッド１６の導電端部１６ａ、導電性回転支持体１５、高圧シールド１２を通して高圧コイル１１に電気的に接続される。なお、１３は、低圧コイル１０の端部のタンク寄りに設けられた接地シールドである。 The insulating rod 16 has a main shaft 17 in addition to the conductive end portion 16a. The main shaft 17 is hermetically and rotatably penetrates the tank 1 by the rotary seal portion 18, and the conductive portion side is the high-pressure shield 12. A part (notch) passes through and reaches the conductive rotary support 15.
Further, a rotation operation mechanism 19 is connected to the other end portion of the insulating rod 16 outside the tank, and the movable conductor 14 is operated via the insulation rod 16 and the conductive rotation support 15 by the rotation operation of the rotation operation mechanism 19. By doing so, the operation of contact / separation operation with respect to the high-pressure contact portion 5 is performed.
Thus, the insulating rod 16 is supported at two points by the tank penetrating portion that penetrates the tank 1 in an airtight manner, that is, the rotary seal portion 18 and the conductive rotary support 15 provided at the connection portion of the high-voltage shield for electric field relaxation. .
The electrical connection between the high-voltage coil 11 and the electric field relaxation high-voltage shield 12 is performed by soldering the lead wire 11a of the high-voltage coil 11 from the hole 12a provided in the electric field relaxation high-voltage shield 12 to the steel plate provided on the electric field relaxation high-voltage shield 12. 12b.
Thereby, the movable conductor 14 is electrically connected to the high voltage coil 11 through the conductive end portion 16 a of the insulating rod 16, the conductive rotation support 15, and the high voltage shield 12. Reference numeral 13 denotes a ground shield provided near the tank at the end of the low voltage coil 10.

可動導体の他端部１４ｂには、特許文献２と同様にスプリングなどの弾性体で構成され、高圧接触部５に対し寸法調整可能な可動接触子２０が取付けられている。この可動接触子２０を介し高圧接触部５と可動導体１４とが電気的に接続されると共に可動導体１４の接離動作が円滑に行われる。   A movable contact 20 that is made of an elastic body such as a spring and whose dimensions can be adjusted with respect to the high-pressure contact portion 5 is attached to the other end portion 14 b of the movable conductor. The high-voltage contact portion 5 and the movable conductor 14 are electrically connected via the movable contact 20 and the moving / separating operation of the movable conductor 14 is performed smoothly.

次に動作について説明する。
電力系統機器の通常運転時は、図１に示すように、可動導体１４の可動接触子２０を高圧接触部５に接触させることにより、貫通導体４―可動導体１４―絶縁ロッド１６の導電部（金属部）―導電性回転支持体１５―電界緩和用高圧シールド１２―高圧コイル１１の導電経路が形成され、高圧変成要素６で高電圧測定を行うことができる。
電力系統機器、例えばガス絶縁開閉装置の直流及び交流絶縁試験のような課電試験を行う場合には、タンク１の外側に設けた回転操作機構１９を回転操作すると、タンク１内の可動導体１４が主軸１７、絶縁ロッド１６、導電性回転支持体１５を介して図１の想像線で示す位置に回転し、高圧接触部５との接触を解き高圧コイル１１への回路を遮断するので、電圧変成要素６が高電圧回路から切り離される。この切り離し動作により過電圧の侵入によるガス絶縁計器用変圧器の故障を防ぐことができる。 Next, the operation will be described.
During normal operation of the power system equipment, as shown in FIG. 1, by bringing the movable contact 20 of the movable conductor 14 into contact with the high voltage contact portion 5, the conductive portion (through conductor 4 −movable conductor 14 −insulating rod 16 ( Metal part) -conductive rotary support 15-electric field relaxation high voltage shield 12-high voltage coil 11 is formed, and high voltage measurement can be performed by the high voltage transformation element 6.
When performing a power application test such as a direct current and alternating current insulation test of a power system device, for example, a gas insulated switchgear, when the rotational operation mechanism 19 provided outside the tank 1 is rotated, the movable conductor 14 in the tank 1 is operated. 1 rotates through the main shaft 17, the insulating rod 16, and the conductive rotary support 15 to the position indicated by the imaginary line in FIG. 1 to release the contact with the high voltage contact portion 5 and shut off the circuit to the high voltage coil 11. Transform element 6 is disconnected from the high voltage circuit. This disconnection operation can prevent a failure of the gas insulated instrument transformer due to the entry of an overvoltage.

実施の形態２．
図４は、この発明の実施の形態２におけるガス絶縁計器用変圧器の縦断正面図である。
実施の形態１では、回転導体１４の、高圧接触部５と対向する他端部１４ｂに可動接触子２０を取付けたが、この実施の形態２では、絶縁スペーサ３の高圧接触部５の、可動導体１４０の他端部（自由端部）１４０ｂと対向する箇所に、可動接触子２０を設けるようにしたものである。このようにすれば、可動導体１４０と高圧接触部５との接触の調整が容易にできるため、組立時間を短縮することができるという効果がある。 Embodiment 2. FIG.
FIG. 4 is a longitudinal front view of a transformer for gas insulated instrument according to Embodiment 2 of the present invention.
In the first embodiment, the movable contact 20 is attached to the other end portion 14b of the rotating conductor 14 facing the high-voltage contact portion 5. However, in the second embodiment, the high-voltage contact portion 5 of the insulating spacer 3 is movable. The movable contact 20 is provided at a location facing the other end (free end) 140b of the conductor 140. In this way, the adjustment of the contact between the movable conductor 140 and the high-voltage contact portion 5 can be easily performed, so that the assembly time can be shortened.

実施の形態３．
図５は、この発明の実施の形態３におけるガス絶縁計器用変圧器の縦断側面図で、図５（ａ）は、その全体を示し、図５（ｂ）は、導電性回転支持体の取付け状態を示す一部断面図である。
実施の形態1では、導電性回転支持体１５を２分割された分割形電界緩和用高圧シールド１２の接続部の片側に設けたが、この実施の形態３では、分割形高圧シールドの分割面以外の別箇所に溶接された取付け座（取付け体）２３に取付け板２４をボルト２５で固定し、その取付け板２４に導電性回転支持体１５すなわちボールベアリングの外輪を取付けたものである。このようにすれば、取付け板２４の位置を決定することで、高圧接触部５と可動導体１４１との位置関係を容易に調整でき、組立時間を短縮することができるという効果がある。なお、この実施例では可動接触子２０は、図１、図２に示された実施の形態１と同様に可動導体１４１の他端部（自由端部）１４１ｂに設けられている。 Embodiment 3 FIG.
FIG. 5 is a longitudinal sectional side view of a transformer for gas insulated instrument according to Embodiment 3 of the present invention, FIG. 5 (a) shows the whole, and FIG. 5 (b) shows the attachment of a conductive rotating support. It is a partial sectional view showing a state.
In the first embodiment, the conductive rotary support 15 is provided on one side of the connection part of the divided-type electric field relaxation high-voltage shield 12 divided into two parts, but in this third embodiment, other than the divided surface of the divided-type high-voltage shield. A mounting plate 24 is fixed to a mounting seat (mounting body) 23 welded to the other part by bolts 25, and a conductive rotating support 15, that is, an outer ring of a ball bearing is mounted on the mounting plate 24. In this way, by determining the position of the mounting plate 24, the positional relationship between the high-voltage contact portion 5 and the movable conductor 141 can be easily adjusted, and the assembly time can be shortened. In this embodiment, the movable contact 20 is provided on the other end portion (free end portion) 141b of the movable conductor 141 in the same manner as in the first embodiment shown in FIGS.

実施の形態４．
図６は、この発明の実施の形態４におけるガス絶縁計器用変圧器の縦断正面図である。
実施の形態３では、回転導体１４１の、高圧接触部５と対向する他端部である自由端１４１ｂに可動接触子２０を取付けたが、この実施の形態４では、絶縁スペーサ３の高圧接触部５の、可動導体１４２の他端部（自由端部）１４２ｂと対向する箇所に、可動接触子２０を設けるようにしたものである。このようにすれば、可動導体１４２と高圧接触部５との接触の調整が容易にできる。 Embodiment 4 FIG.
FIG. 6 is a longitudinal sectional front view of a transformer for gas insulated instrument according to Embodiment 4 of the present invention.
In the third embodiment, the movable contact 20 is attached to the free end 141b that is the other end of the rotating conductor 141 that faces the high-voltage contact portion 5. However, in the fourth embodiment, the high-voltage contact portion of the insulating spacer 3 is used. 5, the movable contact 20 is provided at a location facing the other end (free end) 142 b of the movable conductor 142. In this way, it is possible to easily adjust the contact between the movable conductor 142 and the high-voltage contact portion 5.

上記各実施の形態では、電圧変成要素が単相の場合を例にしたが、当然３相ガス絶縁計器用変圧器にも適用できる。   In each of the above embodiments, the case where the voltage transforming element is a single phase has been taken as an example, but it is naturally applicable to a transformer for a three-phase gas insulated instrument.

この発明の実施の形態１におけるガス絶縁計器用変圧器の縦断正面図である。It is a vertical front view of the transformer for gas insulated meters in Embodiment 1 of this invention. この発明の実施の形態１におけるガス絶縁計器用変圧器の縦断側面図である。It is a vertical side view of the transformer for gas insulation meters in Embodiment 1 of this invention. 図１をIII−III線に沿って切断し矢印方向に見た縦断平面図である。FIG. 3 is a longitudinal plan view of FIG. 1 cut along the line III-III and viewed in the direction of the arrow. この発明の実施の形態２におけるガス絶縁計器用変圧器の縦断正面図である。It is a vertical front view of the transformer for gas insulation instruments in Embodiment 2 of this invention. この発明の実施の形態３におけるガス絶縁計器用変圧器の縦断側面図である。It is a vertical side view of the transformer for gas insulation meters in Embodiment 3 of this invention. この発明の実施の形態４におけるガス絶縁計器用変圧器の縦断正面図である。It is a vertical front view of the transformer for gas insulation instruments in Embodiment 4 of this invention.

符号の説明Explanation of symbols

１ タンク ２ 開口部
３ 絶縁スペーサ ４ 貫通導体
５ 高圧接触部 ５ａ 切欠部
６ 電圧変成要素 ７ タンクの底板
８ 額縁状の鉄心 ９ 継鉄部分
１０ 低圧コイル １１ 高圧コイル
１１ａ リード線 １２ 分割形電界緩和用高圧シールド
１２ａ 穴 １２ｂ ハンダ付け
１３ 接地シールド
１４、１４０、１４１，１４２、 可動導体
１５ 導電性回転支持体 １６ 絶縁ロッド
１６ａ 絶縁ロッドの導電端部 １７ 主軸
１８ 回転シール部 １９ 回転操作機構
２０ 可動接触子 ２１ 絶縁ガス
２２ａ、２２ｂ 取付け板 ２３ ボルト
２４ 取付け板 ２５ ボルト
２６ 取付け座（取付け体） DESCRIPTION OF SYMBOLS 1 Tank 2 Opening part 3 Insulation spacer 4 Through-conductor 5 High voltage contact part 5a Notch part 6 Voltage transformation element 7 Tank bottom plate 8 Frame-shaped iron core 9 Relay part 10 Low voltage coil 11 High voltage coil 11a Lead wire 12 For division | segmentation type electric field relaxation High-voltage shield 12a Hole 12b Soldering 13 Ground shield 14, 140, 141, 142, Movable conductor 15 Conductive rotating support 16 Insulating rod 16a Insulating rod conductive end 17 Spindle 18 Rotating seal 19 Rotating operation mechanism 20 Movable contact 21 Insulating gas 22a, 22b Mounting plate 23 Bolt 24 Mounting plate 25 Bolt 26 Mounting seat (mounting body)

Claims (4)

絶縁ガスを封入したタンクに内設された鉄心と、この鉄心に巻回された低圧コイルと、この低圧コイルと同軸的に巻回された高圧コイルとを有する電圧変成要素を備えたガス絶縁計器用変圧器において、
上記タンクの開口部に絶縁スペーサを介して気密に取付けられ、上記タンク外部の回路に接続された外端部、及び上記タンク内に導入される内端部を有する貫通導体、
互いに連結され上記高圧コイルに環状に取付けられた分割形電界緩和用高圧シールド、
この分割形電界緩和用高圧シールドのいずれかの分割部分に回転自在に設けられた導電性回転支持体、
一端部が上記導電性回転支持体に設けられ、他端部が上記貫通導体の内端部と接離自在に配置された可動導体、
上記タンクを気密に且つ回転自在に貫通し、導電部を有する一端部が上記導電性回転支持体に取付けられた絶縁ロッド、
この絶縁ロッドの回転操作により上記可動導体の接離動作を操作する回転操作機構を備えたことを特徴とするガス絶縁計器用変圧器。 Gas insulation meter having a voltage transformer element having an iron core installed in a tank filled with an insulating gas, a low voltage coil wound around the iron core, and a high voltage coil wound coaxially with the low voltage coil Transformer for
A through conductor having an outer end connected to a circuit outside the tank, and an inner end introduced into the tank, hermetically attached to the opening of the tank via an insulating spacer;
Split type electric field relaxation high voltage shield connected to each other and annularly attached to the high voltage coil,
A conductive rotary support rotatably provided in any divided part of the divided electric field relaxation high-voltage shield;
One end is provided on the conductive rotary support, and the other end is a movable conductor disposed so as to be in contact with and away from the inner end of the through conductor.
An insulating rod that penetrates the tank in an airtight and rotatable manner and has one end portion having a conductive portion attached to the conductive rotary support;
A gas-insulated instrument transformer comprising a rotation operation mechanism for operating a contact / separation operation of the movable conductor by rotating the insulating rod. 上記導電性回転支持体は、上記分割形高圧シールドの分割面以外の別箇所に設けた取付け体に、回転自在に設けられたことを特徴とする請求項１記載のガス絶縁計器用変圧器。   2. The gas insulated instrument transformer according to claim 1, wherein the conductive rotary support is rotatably provided on an attachment provided at a location other than the split surface of the split high-voltage shield. 上記可動導体の他端部は、上記貫通導体の内端部との接続時に、弾性体を介して電気的に接続される可動接触子で構成したことを特徴とする請求項１又は請求項２記載のガス絶縁計器用変圧器。   The other end portion of the movable conductor is constituted by a movable contact that is electrically connected via an elastic body when connected to the inner end portion of the through conductor. The transformer for gas insulation instrument of description. 上記貫通導体の内端部は、上記可動導体の他端部との接続時に、弾性体を介して電気的に接続される可動接触子で構成したことを特徴とする請求項１又は請求項２記載のガス絶縁計器用変圧器。
The inner end portion of the through conductor is formed of a movable contact that is electrically connected via an elastic body when connected to the other end portion of the movable conductor. The transformer for gas insulation instrument of description.
JP2006294460A 2006-10-30 2006-10-30 Transformer for gas insulated meter Pending JP2008112836A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015041739A (en) * 2013-08-23 2015-03-02 日新電機株式会社 Transformer for gas insulated instrument
CN108172385A (en) * 2017-12-29 2018-06-15 上海吴淞电气实业有限公司 A kind of isolated electromagnetic voltage mutual inductor
CN110164669A (en) * 2019-06-27 2019-08-23 中节能启源雷宇（江苏）电气科技有限公司 A kind of rotation fastening type shading ring
CN110619999A (en) * 2019-07-08 2019-12-27 河南平高电气股份有限公司 Shielding case and voltage transformer using same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015041739A (en) * 2013-08-23 2015-03-02 日新電機株式会社 Transformer for gas insulated instrument
CN108172385A (en) * 2017-12-29 2018-06-15 上海吴淞电气实业有限公司 A kind of isolated electromagnetic voltage mutual inductor
CN110164669A (en) * 2019-06-27 2019-08-23 中节能启源雷宇（江苏）电气科技有限公司 A kind of rotation fastening type shading ring
CN110164669B (en) * 2019-06-27 2024-05-31 中节能启源雷宇（江苏）电气科技有限公司 Rotary fastening type shielding ring
CN110619999A (en) * 2019-07-08 2019-12-27 河南平高电气股份有限公司 Shielding case and voltage transformer using same
CN110619999B (en) * 2019-07-08 2020-10-27 河南平高电气股份有限公司 Shielding case and voltage transformer using same

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