JP7028077B2 - Capacity divider - Google Patents

Capacity divider Download PDF

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JP7028077B2
JP7028077B2 JP2018115060A JP2018115060A JP7028077B2 JP 7028077 B2 JP7028077 B2 JP 7028077B2 JP 2018115060 A JP2018115060 A JP 2018115060A JP 2018115060 A JP2018115060 A JP 2018115060A JP 7028077 B2 JP7028077 B2 JP 7028077B2
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capacitor
convex portion
capacitors
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insulating
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JP2019220519A (en
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修 竹谷
良行 谷水
利眞 深井
敏規 巽
徹 谷水
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Meidensha Corp
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Description

本発明は、容量分圧器に関する。例えば、真空コンデンサ形計器用変圧器に用いられ、一次線路側端子と分圧点の間に主コンデンサである複数のコンデンサを備える容量分圧器に関する。 The present invention relates to a capacitive voltage divider. For example, the present invention relates to a capacitive voltage divider used in a vacuum capacitor type instrument transformer and having a plurality of capacitors which are main capacitors between a primary line side terminal and a voltage dividing point.

容量分圧器は、例えば、絶縁筒内に直列接続された複数のコンデンサを備える（例えば、特許文献１）。 The capacitive voltage divider includes, for example, a plurality of capacitors connected in series in an insulating cylinder (for example, Patent Document 1).

容量分圧器は、例えば、真空コンデンサ形計器用変圧器や高圧プローブ等に用いられる（例えば、特許文献２、３、非特許文献１）。真空コンデンサ形計器用変圧器は、真空コンデンサの高耐電圧により、従来の計器用変圧器（ＶＴ）より小型化することができる。 The capacitive voltage divider is used, for example, in a vacuum capacitor type instrument transformer, a high voltage probe, or the like (for example, Patent Documents 2 and 3, Non-Patent Document 1). The vacuum capacitor type instrument transformer can be made smaller than the conventional instrument transformer (VT) due to the high withstand voltage of the vacuum capacitor.

特開２００３－０５９７３８号公報Japanese Patent Application Laid-Open No. 2003-059738 特開２０１１－０５４７９６号公報Japanese Unexamined Patent Publication No. 2011-054796 特開２００１－２２８１８０号公報Japanese Unexamined Patent Publication No. 2001-228180

「計器用変成器」ＪＥＣ－１２０１－２００７、株式会社 電気書院、２００７年、ｐ．７５－７６"Instrument transformer" JEC-1201-2007, Denki Shoin Co., Ltd., 2007, p. 75-76

容量分圧器において、耐電圧性能を上げるためコンデンサを直列構造とした場合、外部絶縁のために絶縁油または絶縁ガスが必要であり、小型化が困難であった。 In the capacitive voltage divider, when the capacitor has a series structure in order to improve the withstand voltage performance, insulating oil or insulating gas is required for external insulation, and it is difficult to reduce the size.

また、直列接続されたコンデンサが外部応力を受けて変形した場合に、コンデンサに応力が集中すると、コンデンサが破損するおそれがあった。 Further, when a capacitor connected in series is deformed by receiving an external stress, if the stress is concentrated on the capacitor, the capacitor may be damaged.

本発明は、上記事情に鑑みてなされたものであり、容量分圧器を小型化し、容量分圧器を構成するコンデンサの破損を抑制した容量分圧器を提供することを目的としている。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a capacitive voltage divider in which the capacitive voltage divider is miniaturized and the damage of the capacitor constituting the capacitive voltage divider is suppressed.

上記目的を達成する本発明の容量分圧器の一態様は、
直列に接続される複数のコンデンサと、
前記直列に接続されたコンデンサの外周部に備えられる樹脂製の碍管と、
前記碍管の各端部にそれぞれ設けられる端子と、を備え、
前記コンデンサは、
絶縁筒と、
前記絶縁筒の端部にそれぞれ備えられる一対の電極と、
前記一対の電極のうちの一方の電極の前記絶縁筒外側の端面に設けられ、前記絶縁筒の軸方向に突出する凸部と、
前記一対の電極のうちの前記凸部が設けられていない側の電極に形成される接続穴と、を備え、
前記複数のコンデンサのうち隣接するコンデンサは、一方のコンデンサの凸部を、他方のコンデンサの接続穴に挿入して直列に接続され、
該直列に接続されたコンデンサの一方のコンデンサの凸部と、他方のコンデンサの接続穴の奥部と、の間に、導電性を有する弾性部材が備えられた、ことを特徴としている。 One aspect of the capacitive voltage divider of the present invention that achieves the above object is
With multiple capacitors connected in series,
A resin tube provided on the outer periphery of the capacitors connected in series, and
A terminal provided at each end of the tube is provided.
The capacitor is
Insulation tube and
A pair of electrodes provided at the ends of the insulating cylinder,
A convex portion provided on the outer end surface of the insulating cylinder of one of the pair of electrodes and protruding in the axial direction of the insulating cylinder.
A connection hole formed in the electrode on the side of the pair of electrodes on which the convex portion is not provided is provided.
Adjacent capacitors among the plurality of capacitors are connected in series by inserting the convex portion of one capacitor into the connection hole of the other capacitor.
It is characterized in that an elastic member having conductivity is provided between the convex portion of one of the capacitors connected in series and the inner portion of the connection hole of the other capacitor.

また、上記目的を達成する本発明の容量分圧器の他の態様は、上記容量分圧器において、
前記接続穴に挿入された凸部の外周部に、シール部材が備えられた、ことを特徴としている。 In addition, another aspect of the capacitive voltage divider of the present invention that achieves the above object is the capacitive voltage divider.
It is characterized in that a sealing member is provided on the outer peripheral portion of the convex portion inserted into the connection hole.

また、上記目的を達成する本発明の容量分圧器の他の態様は、上記容量分圧器において、
前記直列に接続される複数のコンデンサを収容する絶縁管を、さらに備え、
前記絶縁管は、当該絶縁管の外周部に、該絶縁管の軸方向に延びるスリットを備え、
前記碍管は、前記絶縁管に収容された複数のコンデンサに対して樹脂で一体に成型して形成された、ことを特徴としている。 In addition, another aspect of the capacitive voltage divider of the present invention that achieves the above object is the capacitive voltage divider.
An insulating tube accommodating a plurality of capacitors connected in series is further provided.
The insulating tube is provided with a slit extending in the axial direction of the insulating tube on the outer peripheral portion of the insulating tube.
The porcelain tube is characterized in that it is integrally molded with a resin for a plurality of capacitors housed in the insulating tube.

また、上記目的を達成する本発明の真空コンデンサ形計器用変圧器は、上記いずれかの容量分圧器を備えた、ことを特徴としている。 Further, the transformer for a vacuum capacitor type instrument of the present invention that achieves the above object is characterized in that it is provided with any of the above-mentioned capacitance voltage dividers.

以上の発明によれば、容量分圧器を小型化し、容量分圧器を構成するコンデンサの破損を抑制することができる。 According to the above invention, the capacitance voltage divider can be miniaturized and the capacitor constituting the capacitive voltage divider can be suppressed from being damaged.

本発明の実施形態に係る容量分圧器の概略図である。It is a schematic diagram of the capacity voltage divider which concerns on embodiment of this invention. 真空コンデンサの側面図である。It is a side view of a vacuum capacitor. 直列接続された真空コンデンサの接続部の説明図である。It is explanatory drawing of the connection part of the vacuum capacitor connected in series. （ａ)絶縁管の側面図、（ｂ）絶縁管のＡ－Ａ断面図である。(A) A side view of the insulated tube, and (b) a sectional view taken along the line AA of the insulated tube.

本発明の実施形態に係る容量分圧器について、図面に基づいて詳細に説明する。なお、実施形態の説明では、容量分圧器を真空コンデンサ形計器用変圧器に適用した形態を例示して説明するが、容量分圧器の用途は実施形態に限定されるものではなく、例えば、高圧プローブ等に適用することができる。 The capacitive voltage divider according to the embodiment of the present invention will be described in detail with reference to the drawings. In the description of the embodiment, an embodiment in which the capacitance voltage divider is applied to a vacuum capacitor type instrument transformer will be described as an example, but the application of the capacitance voltage divider is not limited to the embodiment, for example, high voltage. It can be applied to probes and the like.

図１に示すように、本発明の実施形態に係る容量分圧器１は、直列に接続された複数の真空コンデンサ２を備える。この直列に接続された複数の真空コンデンサ２は、真空コンデンサ形計器用変圧器３の主コンデンサとして備えられる。すなわち、容量分圧器１は、複数の真空コンデンサ２と、この真空コンデンサ２に直列接続される分圧コンデンサ４を備える。分圧コンデンサ４は、例えば、真空コンデンサやフィルムコンデンサ等である。また、主コンデンサ（直列に接続された複数の真空コンデンサ２）と分圧コンデンサ４の共通接続点には、出力端子５が接続される。図示省略しているが、分圧コンデンサ４と並列に共振リアクトルや変圧器、または電圧検出部が備えられ、これらの出力を必要な出力形態に変換する変成装置部が備えられる。 As shown in FIG. 1, the capacitive voltage divider 1 according to the embodiment of the present invention includes a plurality of vacuum capacitors 2 connected in series. The plurality of vacuum capacitors 2 connected in series are provided as main capacitors of the vacuum capacitor type instrument transformer 3. That is, the capacitive voltage divider 1 includes a plurality of vacuum capacitors 2 and a voltage divider capacitor 4 connected in series to the vacuum capacitors 2. The voltage dividing capacitor 4 is, for example, a vacuum capacitor, a film capacitor, or the like. Further, an output terminal 5 is connected to a common connection point between the main capacitor (a plurality of vacuum capacitors 2 connected in series) and the voltage dividing capacitor 4. Although not shown, a resonance reactor, a transformer, or a voltage detection unit is provided in parallel with the voltage dividing capacitor 4, and a transformation device unit that converts these outputs into a required output form is provided.

直列に接続された複数の真空コンデンサ２は、絶縁管６内に備えられる。絶縁管６の一方の端部には高圧端子７が備えられ、絶縁管６の他方の端部には、ベース８が備えられる。高圧端子７は一次線路側に接続され、ベース８は分圧コンデンサ４に接続される。また、絶縁管６の外周部にはブッシング９が備えられる。 A plurality of vacuum capacitors 2 connected in series are provided in the insulating tube 6. One end of the insulating tube 6 is provided with a high voltage terminal 7, and the other end of the insulating tube 6 is provided with a base 8. The high voltage terminal 7 is connected to the primary line side, and the base 8 is connected to the voltage dividing capacitor 4. Further, a bushing 9 is provided on the outer peripheral portion of the insulating tube 6.

ブッシング９は、例えば、絶縁管６とともにポリマー（樹脂）で成型される。したがって、ブッシング９は、絶縁管６内に充填された内部ポリマー９ａと、絶縁管６の外周部に形成される碍子部ポリマー９ｂを備える。碍子部ポリマー９ｂをひだ状に形成することで、ブッシング９の外周部における沿面閃絡が防止される。ブッシング９は、例えば、シリコーン樹脂やエポキシ樹脂等のポリマー（樹脂）により形成される。 The bushing 9 is molded of a polymer (resin) together with the insulating tube 6, for example. Therefore, the bushing 9 includes an internal polymer 9a filled in the insulating tube 6 and an insulator polymer 9b formed on the outer peripheral portion of the insulating tube 6. By forming the insulator portion polymer 9b in a pleated shape, creeping flashes at the outer peripheral portion of the bushing 9 are prevented. The bushing 9 is formed of, for example, a polymer (resin) such as a silicone resin or an epoxy resin.

図２に示すように、真空コンデンサ２は、例えば、高圧側電極２ａとベース側電極２ｂを絶縁筒２ｃで絶縁して構成される。絶縁筒２ｃは、例えば、セラミック等により形成される。絶縁筒２ｃの一方の端部に高圧側電極２ａをろう付け接合し、絶縁筒２ｃの他方の端部にベース側電極２ｂをろう付け接合して、絶縁筒２ｃの内部が真空状態となるように封止される。図示省略しているが、絶縁筒２ｃ内部には、接触しない状態で対向配置される高圧側内部電極と低圧側内部電極が備えられる。高圧側内部電極は、例えば、円筒状であり高圧側電極２ａの絶縁筒２ｃ内側端面に備えられる。低圧側内部電極は、例えば、高圧側内部電極内に挿入される円筒状または棒状でありベース側電極２ｂの絶縁筒２ｃ内側端面に備えられる。 As shown in FIG. 2, the vacuum capacitor 2 is configured by, for example, insulating the high-voltage side electrode 2a and the base side electrode 2b with an insulating cylinder 2c. The insulating cylinder 2c is formed of, for example, ceramic or the like. The high-voltage side electrode 2a is brazed and joined to one end of the insulating cylinder 2c, and the base side electrode 2b is brazed and joined to the other end of the insulating cylinder 2c so that the inside of the insulating cylinder 2c is in a vacuum state. Is sealed in. Although not shown, the inside of the insulating cylinder 2c is provided with a high-voltage side internal electrode and a low-voltage side internal electrode arranged so as to face each other in a non-contact state. The high-voltage side internal electrode is, for example, cylindrical and is provided on the inner end surface of the insulating cylinder 2c of the high-voltage side electrode 2a. The low-voltage side internal electrode is, for example, cylindrical or rod-shaped inserted into the high-voltage side internal electrode, and is provided on the inner end surface of the insulating cylinder 2c of the base side electrode 2b.

高圧側電極２ａの絶縁筒２ｃ外側端面の中央部には、絶縁筒２ｃの軸方向外側に突出して円筒状の凸部２ｄが備えられる。そして、ベース側電極２ｂの絶縁筒２ｃ外側端面の中央部には接続穴２ｅが形成される。なお、ベース側電極２ｂには接続穴２ｅが形成されるので、ベース側電極２ｂは接続穴２ｅの深さ以上の厚みを有している。 A cylindrical convex portion 2d is provided at the center of the outer end surface of the insulating cylinder 2c of the high-voltage side electrode 2a so as to project outward in the axial direction of the insulating cylinder 2c. Then, a connection hole 2e is formed in the central portion of the outer end surface of the insulating cylinder 2c of the base side electrode 2b. Since the connection hole 2e is formed in the base side electrode 2b, the base side electrode 2b has a thickness equal to or larger than the depth of the connection hole 2e.

図３に示すように、凸部２ｄは、隣接する他の真空コンデンサ２の接続穴２ｅまたは高圧端子７に形成された接続穴（接続穴２ｅと同様の接続穴）に挿入される。凸部２ｄには、凸部２ｄの軸方向に延びる穴２ｆが形成される。この穴２ｆに、導電ばね１０等の導電性を有する弾性部材が備えられる。導電ばね１０は、凸部２ｄと凸部２ｄが挿入された接続穴２ｅの奥部の間に設けられ、凸部２ｄと凸部２ｄが挿入された接続穴２ｅの奥部の間の電気的接続を確保する。また、凸部２ｄの外周部には、凸部２ｄの外周に沿って径方向に突出する一対の保持部２ｇが備えられており、この保持部２ｇ間にＯリング１１等のシール部材が備えられる。なお、Ｏリング１１は、凸部２ｄの軸方向に並んで複数備えてもよい。 As shown in FIG. 3, the convex portion 2d is inserted into a connection hole 2e of another adjacent vacuum capacitor 2 or a connection hole (similar to the connection hole 2e) formed in the high voltage terminal 7. A hole 2f extending in the axial direction of the convex portion 2d is formed in the convex portion 2d. An elastic member having conductivity such as a conductive spring 10 is provided in the hole 2f. The conductive spring 10 is provided between the convex portion 2d and the inner portion of the connection hole 2e into which the convex portion 2d is inserted, and is electrically connected between the convex portion 2d and the inner portion of the connection hole 2e into which the convex portion 2d is inserted. Secure a connection. Further, the outer peripheral portion of the convex portion 2d is provided with a pair of holding portions 2g protruding in the radial direction along the outer peripheral portion of the convex portion 2d, and a sealing member such as an O-ring 11 is provided between the holding portions 2g. Be done. A plurality of O-rings 11 may be provided side by side in the axial direction of the convex portion 2d.

接続穴２ｅは、隣接する他の真空コンデンサ２の凸部２ｄまたは、ベース８に備えられた凸部（凸部２ｄと同様の凸部）が挿入される穴である。接続穴２ｅの内径は、凸部２ｄの外径よりも大きく形成される。接続穴２ｅに凸部２ｄを挿入することで、隣接する真空コンデンサ２間（真空コンデンサ２と高圧端子７間、または真空コンデンサ２とベース８間も同様、以下同じ）が接続される。このとき、隣接する真空コンデンサ２間の高圧側電極２ａとベース側電極２ｂはＯリング１１によって保持され、この真空コンデンサ２間の電気的接続は導電ばね１０によって確保される。 The connection hole 2e is a hole into which a convex portion 2d of another adjacent vacuum capacitor 2 or a convex portion provided on the base 8 (a convex portion similar to the convex portion 2d) is inserted. The inner diameter of the connection hole 2e is formed to be larger than the outer diameter of the convex portion 2d. By inserting the convex portion 2d into the connection hole 2e, the adjacent vacuum capacitors 2 (the same applies to the vacuum capacitor 2 and the high voltage terminal 7 or the vacuum capacitor 2 and the base 8) are connected. At this time, the high-voltage side electrode 2a and the base side electrode 2b between the adjacent vacuum capacitors 2 are held by the O-ring 11, and the electrical connection between the vacuum capacitors 2 is secured by the conductive spring 10.

絶縁管６は、例えば、ＦＲＰ（繊維強化プラスチック）で環状に形成された筒である。図４に示すように、絶縁管６の外周部には、絶縁管６の軸方向に延びる複数のスリット６ａが形成される。絶縁管６にスリット６ａを形成することで、ブッシング９のポリマー成型時にボイド等の成型不良が発生することが抑制される。 The insulating tube 6 is, for example, a tube formed of FRP (fiber reinforced plastic) in an annular shape. As shown in FIG. 4, a plurality of slits 6a extending in the axial direction of the insulating tube 6 are formed on the outer peripheral portion of the insulating tube 6. By forming the slit 6a in the insulating tube 6, it is possible to prevent molding defects such as voids from occurring during polymer molding of the bushing 9.

以上のような本発明の実施形態に係る容量分圧器１によれば、直列接続した真空コンデンサ２の絶縁をポリマーで形成されたブッシング９で行うことで、容量分圧器１の小型・軽量化とメンテナンスフリー化が可能となる。 According to the capacitive voltage divider 1 according to the embodiment of the present invention as described above, by insulating the vacuum capacitors 2 connected in series with the bushing 9 made of a polymer, the capacitive voltage divider 1 can be made smaller and lighter. Maintenance-free becomes possible.

具体的に説明すると、絶縁管６（および、絶縁管６の外周に設けられるひだを含むブッシング９）を樹脂で形成することで、セラミック等で碍子を形成した場合と比較して、容量分圧器１を軽量化することができる。また、内部に絶縁オイルやガスを充填する必要がないので、容量分圧器１の構成を簡略化することができる。 Specifically, by forming the insulating tube 6 (and the bushing 9 including the folds provided on the outer periphery of the insulating tube 6) with resin, the capacitance voltage divider is compared with the case where the insulator is formed of ceramic or the like. 1 can be reduced in weight. Further, since it is not necessary to fill the inside with insulating oil or gas, the configuration of the capacitance voltage divider 1 can be simplified.

一方で、絶縁管６（および、ブッシング９）を樹脂等で形成した場合、絶縁管６（および、ブッシング９）は熱等により伸縮する。絶縁管６（および、ブッシング９）が伸縮して真空コンデンサ２に応力が加えられると、真空コンデンサ２が破損するおそれがある。 On the other hand, when the insulating tube 6 (and the bushing 9) is formed of a resin or the like, the insulating tube 6 (and the bushing 9) expands and contracts due to heat or the like. If the insulating tube 6 (and the bushing 9) expands and contracts and stress is applied to the vacuum capacitor 2, the vacuum capacitor 2 may be damaged.

そこで、本発明の実施形態に係る容量分圧器１は、接続穴２ｅに凸部２ｄを挿入して真空コンデンサ２間を直列に接続することで、熱による絶縁管６（および、ブッシング９）のサイズ変化や外部から応力の影響による真空コンデンサ２の破損を防止することができる。 Therefore, in the capacitive voltage divider 1 according to the embodiment of the present invention, the convex portion 2d is inserted into the connection hole 2e to connect the vacuum capacitors 2 in series, so that the insulating tube 6 (and the bushing 9) due to heat is connected. It is possible to prevent the vacuum capacitor 2 from being damaged due to a change in size or the influence of stress from the outside.

また、凸部２ｄにＯリング１１を備えることで、容量分圧器１の絶縁管６の径方向の可動領域が増加する。つまり、高圧側電極２ａの凸部２ｄの軸径をベース側電極２ｂの接続穴２ｅの穴径より小さくし、さらにＯリング１１等のシール部材で真空コンデンサ２間を保持する構造とすることで、ブッシング９に応力が加えられ変形した際に、真空コンデンサ２の接続部が可動し、応力が真空コンデンサ２に集中することが防止される。その結果、絶縁管６（および、ブッシング９）のサイズ変化や外部からの応力によって、真空コンデンサ２が破損することが防止される。 Further, by providing the O-ring 11 on the convex portion 2d, the movable region in the radial direction of the insulating tube 6 of the capacitance voltage divider 1 is increased. That is, the shaft diameter of the convex portion 2d of the high-pressure side electrode 2a is made smaller than the hole diameter of the connection hole 2e of the base side electrode 2b, and a sealing member such as an O ring 11 is used to hold the space between the vacuum capacitors 2. When the bushing 9 is deformed by applying stress, the connection portion of the vacuum capacitor 2 moves, and the stress is prevented from being concentrated on the vacuum capacitor 2. As a result, the vacuum capacitor 2 is prevented from being damaged by the size change of the insulating tube 6 (and the bushing 9) and the stress from the outside.

また、凸部２ｄにＯリング１１を備えることで、絶縁管６内にポリマーを充填した際に、凸部２ｄの端面と接続穴２ｅの奥部の間にポリマーが入り込むことが防止される。このように、Ｏリング１１によって、接続穴２ｅの内周面と凸部２ｄの端部とＯリング１１で囲まれた空間に対するポリマーの充填を防ぐことで、導電ばね１０による高圧側電極２ａとベース側電極２ｂの電気的接続をブッシング９変形時も保つことができる。 Further, by providing the O-ring 11 in the convex portion 2d, when the insulating tube 6 is filled with the polymer, the polymer is prevented from entering between the end surface of the convex portion 2d and the inner portion of the connection hole 2e. In this way, the O-ring 11 prevents the space surrounded by the inner peripheral surface of the connection hole 2e, the end of the convex portion 2d, and the O-ring 11 from being filled with the polymer, so that the high-voltage side electrode 2a by the conductive spring 10 can be used. The electrical connection of the base side electrode 2b can be maintained even when the bushing 9 is deformed.

そして、本発明の実施形態に係る容量分圧器１を、高電圧ＣＶＴ（例えば、真空コンデンサ形計器用変圧器３）に適用することで、軽量且つ絶縁材の交換を不要とすることができる。また、外部応力による真空コンデンサ２の破壊を防止することができる。 By applying the capacitance voltage divider 1 according to the embodiment of the present invention to a high voltage CVT (for example, a vacuum capacitor type instrument transformer 3), it is lightweight and can eliminate the need for replacement of an insulating material. Further, it is possible to prevent the vacuum capacitor 2 from being destroyed by external stress.

以上、具体的な実施形態を示して本発明の容量分圧器について説明したが、本発明の容量分圧器は、実施形態に限定されるものではなく、その特徴を損なわない範囲で適宜設計変更が可能であり、設計変更されたものも、本発明の技術的範囲に属する。 Although the capacitive voltage divider of the present invention has been described above by showing a specific embodiment, the capacitive voltage divider of the present invention is not limited to the embodiment, and the design may be appropriately changed as long as the characteristics are not impaired. Those that are possible and have been redesigned also belong to the technical scope of the present invention.

例えば、真空コンデンサ２の凸部２ｄは、必ずしも高圧端子７側に設けることに限定されるものではなく、ベース８側に突出した凸部を設けることもできる。この場合、真空コンデンサの高圧端子側に接続穴が形成されることとなる。 For example, the convex portion 2d of the vacuum capacitor 2 is not necessarily limited to being provided on the high voltage terminal 7 side, and a convex portion protruding on the base 8 side may be provided. In this case, a connection hole is formed on the high voltage terminal side of the vacuum capacitor.

また、実施形態で説明した容量分圧器１の特徴の一部を備える形態も本発明の技術的範囲に属する。例えば、実施形態の説明では、凸部２ｄの外周部にＯリング１１を設けた例を示しているが、Ｏリング１１は、必ずしも必要なものではなく、凸部２ｄを接続穴２ｅに摺動可能に設ける態様とすることもできる。また、コンデンサ間のジョイント部を可動な状態で支持する支持部材をＯリングの代わりに用いたり、ジョイント部に空間が形成されるように絶縁管６と各真空コンデンサ２の間を固定または支持する態様としたりすることで、コンデンサの破損を防止できる。 Further, a mode including some of the features of the capacitive voltage divider 1 described in the embodiment also belongs to the technical scope of the present invention. For example, in the description of the embodiment, an example in which the O-ring 11 is provided on the outer peripheral portion of the convex portion 2d is shown, but the O-ring 11 is not always necessary, and the convex portion 2d slides into the connection hole 2e. It can also be provided as possible. Further, a support member that supports the joint portion between the capacitors in a movable state is used instead of the O-ring, or the insulation tube 6 and each vacuum capacitor 2 are fixed or supported so that a space is formed in the joint portion. It is possible to prevent the capacitor from being damaged by using the mode.

また、凸部２ｄは、円筒状だけでなく、円柱状または円柱状の端面に導電ばね１０（弾性部材）が備えられる溝が形成された態様とすることもできる。 Further, the convex portion 2d may be formed not only in a cylindrical shape but also in a cylindrical shape or a groove having a groove provided with a conductive spring 10 (elastic member) on the end face of the columnar shape.

また、実施形態の説明では、絶縁管６内に同様の真空コンデンサ２を複数収納した例を示したが、絶縁管６内に種類の異なる真空コンデンサを配置する態様とすることもできる。例えば、直列に接続された真空コンデンサの静電容量を、下段より上段が大きいようにすることで、各真空コンデンサに印加される電圧が地面の影響により不均一になることが緩和される。また、本発明の容量分圧器を構成するコンデンサは、真空コンデンサに限定されるものではなく、ガス封入コンデンサ、オイルコンデンサまたはセラミックコンデンサ等を用いることもできる。 Further, in the description of the embodiment, an example in which a plurality of similar vacuum capacitors 2 are housed in the insulating tube 6 is shown, but different types of vacuum capacitors may be arranged in the insulating tube 6. For example, by making the capacitance of the vacuum capacitors connected in series larger in the upper stage than in the lower stage, it is possible to alleviate that the voltage applied to each vacuum capacitor becomes non-uniform due to the influence of the ground. Further, the capacitor constituting the capacitive voltage divider of the present invention is not limited to the vacuum capacitor, and a gas-filled capacitor, an oil capacitor, a ceramic capacitor or the like can also be used.

１…容量分圧器
２…真空コンデンサ（コンデンサ）
２ａ…高圧側電極（電極）、２ｂ…ベース側電極（電極）、２ｃ…絶縁筒
２ｄ…凸部、２ｅ…接続穴、２ｆ…穴、２ｇ…保持部
３…真空コンデンサ形計器用変圧器
４…分圧コンデンサ
５…出力端子
６…絶縁管、６ａ…スリット
７…高圧端子（端子）
８…ベース（端子）
９…ブッシング（碍管）
９ａ…内部ポリマー、９ｂ…碍子部ポリマー
１０…導電ばね（弾性部材）
１１…Ｏリング（シール部材） 1 ... Capacitive voltage divider 2 ... Vacuum capacitor (capacitor)
2a ... High voltage side electrode (electrode), 2b ... Base side electrode (electrode), 2c ... Insulation cylinder 2d ... Convex part, 2e ... Connection hole, 2f ... Hole, 2g ... Holding part 3 ... Vacuum condenser type voltage transformer 4 ... Voltage dividing capacitor 5 ... Output terminal 6 ... Insulated tube, 6a ... Slit 7 ... High voltage terminal (terminal)
8 ... Base (terminal)
9 ... Bushing
9a ... Internal polymer, 9b ... Insulator polymer 10 ... Conductive spring (elastic member)
11 ... O-ring (seal member)

Claims (3)

直列に接続される複数のコンデンサと、
前記直列に接続される複数のコンデンサを収容する絶縁管と、
前記直列に接続されたコンデンサの外周部に備えられる樹脂製の碍管と、
前記碍管の各端部にそれぞれ設けられる端子と、を備え、
前記コンデンサは、
絶縁筒と、
前記絶縁筒の端部にそれぞれ備えられる一対の電極と、
前記一対の電極のうちの一方の電極の前記絶縁筒外側の端面に設けられ、前記絶縁筒の軸方向に突出する凸部と、
前記一対の電極のうちの前記凸部が設けられていない側の電極に形成される接続穴と、を備え、
前記複数のコンデンサのうち隣接するコンデンサは、一方のコンデンサの凸部を、他方のコンデンサの接続穴に挿入して直列に接続され、
該直列に接続されたコンデンサの一方のコンデンサの凸部と、他方のコンデンサの接続穴の奥部と、の間に、導電性を有する弾性部材が備えられ、
前記絶縁管は、当該絶縁管の外周部に、該絶縁管の軸方向に延びるスリットを備え、
前記碍管は、前記絶縁管に収容された複数のコンデンサに対して樹脂で一体に成型して形成された、
ことを特徴とする容量分圧器。 With multiple capacitors connected in series,
An insulating tube accommodating a plurality of capacitors connected in series ,
A resin tube provided on the outer periphery of the capacitors connected in series, and
A terminal provided at each end of the tube is provided.
The capacitor is
Insulation tube and
A pair of electrodes provided at the ends of the insulating cylinder,
A convex portion provided on the outer end surface of the insulating cylinder of one of the pair of electrodes and protruding in the axial direction of the insulating cylinder.
A connection hole formed in the electrode on the side of the pair of electrodes on which the convex portion is not provided is provided.
Adjacent capacitors among the plurality of capacitors are connected in series by inserting the convex portion of one capacitor into the connection hole of the other capacitor.
A conductive elastic member is provided between the convex portion of one of the capacitors connected in series and the inner portion of the connection hole of the other capacitor .
The insulating tube is provided with a slit extending in the axial direction of the insulating tube on the outer peripheral portion of the insulating tube.
The porcelain tube was formed by integrally molding a plurality of capacitors housed in the insulating tube with a resin.
A capacitive voltage divider that is characterized by that. 前記接続穴に挿入された凸部の外周部に、シール部材が備えられた、ことを特徴とする請求項１に記載の容量分圧器。 The capacitance voltage divider according to claim 1, wherein a sealing member is provided on the outer peripheral portion of the convex portion inserted into the connection hole. 請求項１または請求項２に記載の容量分圧器を備えた、ことを特徴とするコンデンサ形計器用変圧器。 A capacitor-type instrument transformer comprising the capacitance voltage divider according to claim 1 or 2 .
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