JPH09257838A - Photocurrent sensor for on-load tap changer - Google Patents
Photocurrent sensor for on-load tap changerInfo
- Publication number
- JPH09257838A JPH09257838A JP8060975A JP6097596A JPH09257838A JP H09257838 A JPH09257838 A JP H09257838A JP 8060975 A JP8060975 A JP 8060975A JP 6097596 A JP6097596 A JP 6097596A JP H09257838 A JPH09257838 A JP H09257838A
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- core
- current
- magnetic
- intermediate conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、負荷時タップ切
換器の切換開閉器異常監視のために用いる、切換開閉器
内蔵の光電流センサーに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photocurrent sensor with a built-in switching switch, which is used for monitoring abnormalities of a switching switch of a tap switch under load.
【０００２】[0002]
【従来の技術】富士時報Ｖｏｌ．５５，Ｎｏ．６、第１
２頁〜第１７頁記載の解説記事「強電機器への光技術の
応用」にファラデー効果を用いたリングコア形光電流計
が紹介されている。このリングコア形光電流計は、光フ
ァイバー、プリズムおよび偏光子などを磁気光学ガラス
の検出素子に一体化した磁気検出素子を略馬蹄形に成形
したフェライトコアの開口部に配置した電流検出部を用
いている。このような光電流計では電流検出部と観測部
とを絶縁体からなる光ファイバーだけで接続すればよい
ため、高電圧部の電流計測に特に適している。2. Description of the Related Art Vol. 55, No. 6, first
A ring core type photoammeter using the Faraday effect is introduced in a commentary article "Application of optical technology to high-voltage equipment" described on pages 2 to 17. This ring-core type photoammeter uses a current detection unit in which a magnetic detection element in which an optical fiber, a prism, a polarizer, etc. are integrated with a detection element of magneto-optical glass is arranged in the opening of a ferrite core formed in a substantially horseshoe shape. . In such a photoammeter, the current detection unit and the observation unit only need to be connected by an optical fiber made of an insulator, and thus it is particularly suitable for current measurement in a high-voltage unit.
【０００３】[0003]
【発明が解決しようとする課題】高電圧を印加したまま
の状態で接点の開閉をする負荷時タップ切換器におい
て、切換開閉器の異常を監視するために切換開閉器内に
設置する電流センサーとして上述したリングコア形光電
流計の電流検出部と同等なものを用いるには次のような
問題がある。 （１）切換開閉器は構造的に非常に密であり、光電流セ
ンサーを装着するための空間的余裕が小さい。このた
め、光電流センサーはできるだけ小型のものでなければ
ならない。 （２）切換開閉器に光電流センサーを装着するには、検
出する電流が流れる導体を光電流センサーに貫通させる
必要があり、空間的余裕の少ない部位での装着作業性が
悪い。 （３）タップ切換時の機械的振動によって生じる光電流
センサー、鉄心および導体間の相対的位置ずれが測定誤
差に影響するため、相対的な位置を正確に保ちながら切
換開閉器筐体などに強固に固定することが必要である
が、この点での作業性も悪い。 （４）上記したリングコア形光電流計の解説記事では光
ファイバーの引き出し方向に関するバリエーションは示
されていないが、空間的余裕の少ない部位での装着にあ
たっては光ファイバーの引き出し方向の設定が重要事項
になる。切換開閉器内部は高温の変圧器油に曝される場
合があり、塩化ビニールなどで形成されるコード被覆の
ない光ファイバー心線を用いることが好ましいため、取
付姿勢によって光ファイバーが小さな曲げ半径で屈曲す
ることがあり伝送損失の増加や、破損を生じる場合があ
る。DISCLOSURE OF THE INVENTION In a load tap changer that opens and closes contacts while a high voltage is still applied, a current sensor installed in the changeover switch for monitoring abnormality of the changeover switch. There are the following problems in using an equivalent current detector of the ring core type photoammeter described above. (1) The switching switch is structurally very dense and has a small space margin for mounting the photocurrent sensor. For this reason, the photocurrent sensor should be as small as possible. (2) In order to mount the photocurrent sensor on the switching switch, it is necessary to penetrate the photocurrent sensor with the conductor through which the current to be detected flows, and the mounting workability is poor at a portion with a small space margin. (3) Relative displacement between the photocurrent sensor, iron core and conductor that occurs due to mechanical vibration during tap switching affects measurement error. It is necessary to fix it to, but workability in this respect is also poor. (4) The above-mentioned article describing the ring-core type photoammeter does not show variations in the direction of pulling out the optical fiber, but setting the direction of pulling out the optical fiber is an important matter when mounting in a region with a small space margin. The inside of the switching switch may be exposed to high-temperature transformer oil, and it is preferable to use an optical fiber core wire made of vinyl chloride or the like without a cord coating, so the optical fiber bends with a small bending radius depending on the mounting posture. This may increase transmission loss or cause damage.
【０００４】この発明は上記のような問題点を解消する
ためになされたもので、光電流センサーを小型化すると
ともに、装着作業性を向上させ、さらには測定誤差を低
減させ、また測定誤差の変動を防止することを目的とし
ており、切換開閉器内への取付けに好適な光電流センサ
ーの構造を提案するものである。The present invention has been made in order to solve the above-mentioned problems, and makes the photocurrent sensor compact, improves the workability of mounting, further reduces the measurement error, and reduces the measurement error. The present invention proposes a structure of a photocurrent sensor suitable for mounting in a switching switch for the purpose of preventing fluctuation.
【０００５】[0005]
【課題を解決するための手段】この発明に係る負荷時タ
ップ切換器用光電流センサーは、被測定電流を流す中間
導体と、この中間導体を周回する磁路を構成し空隙を有
する鉄心と、この鉄心に設けた空隙内に配置して鉄心と
ともに中間導体を囲繞するようになした磁気検出素子
と、非磁性かつ電気絶縁性の基板に中間導体、鉄心およ
び磁気検出素子を一体的に取付けている。A photocurrent sensor for a tap changer under load according to the present invention includes an intermediate conductor through which a current to be measured is passed, an iron core which forms a magnetic path around the intermediate conductor, and has an air gap. The magnetic detection element is arranged in the void provided in the iron core so as to surround the intermediate conductor together with the iron core, and the intermediate conductor, the iron core and the magnetic detection element are integrally attached to the non-magnetic and electrically insulating substrate. .
【０００６】[0006]
実施形態１．以下、この発明の一実施例を図について説
明する。図１は平面図、図２は図１の破断線Ｘ−Ｘに添
った要部断面図である。図において、１は被測定電流を
流す中間導体で、所定長さの絶縁電線からなり、その両
端に端子１’が取付けてある。２は中間導体１に流れる
電流によって発生し中間導体１を周回する磁束を効率よ
く磁気検出素子の取付部に集中させる鉄心で、コの字状
に打ち抜いた電磁鋼板を所定枚数積層してある。３は鉄
心２の開口部に鉄心２で集中させた磁束を検知するよう
設けた光ファイバー、プリズムおよび偏光子などを磁気
光学ガラスの検出素子とともに一体パッケージに収納し
た磁気検出素子で、鉄心２とともに中間導体１を囲繞す
るように配置している。４は非磁性かつ電気絶縁性の基
板で、中間導体１がその略中央部を貫通しており接着剤
などで固定してある。また、鉄心２および磁気検出素子
３を各々２本の固定ねじ５および６で固定してある。な
お、鉄心２には固定ねじ５が貫通する孔２’が設けてあ
り、鉄心１と固定ねじ５との間には絶縁チューブ２”が
挿入してある。これは、鉄心を構成する各電磁鋼板間の
短絡を防止するためである。なお、基板４には切換開閉
器の筐体等に取付けるための付加要素を設けてあるが図
示していない。Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. 1 is a plan view, and FIG. 2 is a cross-sectional view of the main part taken along the broken line XX of FIG. In the figure, reference numeral 1 is an intermediate conductor through which a current to be measured flows, which is an insulated electric wire of a predetermined length, and terminals 1'are attached to both ends thereof. Reference numeral 2 is an iron core for efficiently concentrating the magnetic flux generated by the current flowing through the intermediate conductor 1 and circulating around the intermediate conductor 1 in the mounting portion of the magnetic detection element, and a predetermined number of electromagnetic steel plates punched in a U-shape are laminated. Reference numeral 3 is a magnetic detection element in which an optical fiber, a prism, a polarizer, etc., which are provided in the opening of the iron core 2 to detect the magnetic flux concentrated by the iron core 2, are housed together with the detection element of the magneto-optical glass in an integrated package. The conductor 1 is arranged so as to surround it. Reference numeral 4 denotes a non-magnetic and electrically insulating substrate, on which the intermediate conductor 1 penetrates the substantially central portion and is fixed with an adhesive or the like. Further, the iron core 2 and the magnetic detection element 3 are fixed by two fixing screws 5 and 6, respectively. The iron core 2 is provided with a hole 2'through which the fixing screw 5 penetrates, and the insulating tube 2 "is inserted between the iron core 1 and the fixing screw 5. In order to prevent a short circuit between the steel plates, the substrate 4 is provided with an additional element for attaching to the casing of the switching switch, etc., but it is not shown.
【０００７】鉄心２と磁気検出素子３とが被測定電流を
流す中間導体１とともに基板４に一体化され、電流セン
サが小型にまとめられている。特に両端に端子１’を取
付けた中間導体１を一体化したので、切換開閉器の内部
に設置する際、中間導体１両端の端子１’と切換開閉器
側配線とを接続すればよく、切換開閉器側配線を電流セ
ンサに貫通させる必要がないので、従来のリングコア形
光電流計の電流検出部と同等なものを用いる場合に比べ
て配線作業性が向上する。さらに、中間導体１が基板４
に固定されており、鉄心２および磁気検出素子３との相
対的な位置の変動が生じないため、中間導体１と鉄心２
および磁気検出素子３との相対的な位置関係に依存する
測定誤差が減少する。The iron core 2 and the magnetic detection element 3 are integrated with the substrate 4 together with the intermediate conductor 1 through which the current to be measured flows, so that the current sensor is made compact. In particular, since the intermediate conductor 1 having the terminals 1'attached to both ends is integrated, it is sufficient to connect the terminals 1'at both ends of the intermediate conductor 1 and the wiring of the switching switch when installing inside the switching switch. Since it is not necessary to pass the switch-side wiring through the current sensor, the wiring workability is improved as compared with the case where the current detection unit of the conventional ring core type photoammeter is used. Further, the intermediate conductor 1 is the substrate 4
Is fixed to the intermediate core 1 and the iron core 2 because the relative positions of the iron core 2 and the magnetic detection element 3 do not change.
And the measurement error depending on the relative positional relationship with the magnetic detection element 3 is reduced.
【０００８】以上の説明では、中間導体１に絶縁電線を
用いるものとしたが、例えば、両端にねじを設けた銅棒
からなる中間導体を基板１に固定するとともに、両端の
ねじ部を用いて切換開閉器側配線と接続すれば、中間導
体の剛性が増加し機械的振動による振れが減少するの
で、鉄心２および磁気検出素子３との相対的な位置関係
がさらに安定して、中間導体と鉄心２および磁気出素子
３との相対的な位置関係に依存する測定誤差がさらに減
少する。In the above description, the insulated wire is used as the intermediate conductor 1. However, for example, the intermediate conductor made of a copper rod having screws at both ends is fixed to the substrate 1 and the screw portions at both ends are used. When connected to the switching switch side wiring, the rigidity of the intermediate conductor increases and the vibration due to mechanical vibration decreases, so the relative positional relationship between the iron core 2 and the magnetic detection element 3 becomes more stable, and the intermediate conductor The measurement error depending on the relative positional relationship between the iron core 2 and the magnetic output element 3 is further reduced.
【０００９】また、鉄心２と磁気検出素子３は基板４の
同一平面上に取付けるものとして説明したが、磁気検出
素子３の光ファイバー引出方向を中間導体と同一方向に
することによって電流センサ−の取付けの自由度が大幅
に改善されることがある。このような場合、基板をＬ字
型にして、その一方の辺を構成する面に鉄心２を、他方
に磁気検出素子３を取付ければよい。もちろん、磁気検
出素子のパッケージ形状をかえて、基板４の同一平面上
に鉄心２とともに磁気検出素子の光ファイバーが中間導
体と同一方向に引き出せるように構成してもよい。Although the iron core 2 and the magnetic detection element 3 are described as being mounted on the same plane of the substrate 4, the magnetic sensor is mounted by setting the direction of the optical fiber of the magnetic detection element 3 to be the same as that of the intermediate conductor. The degree of freedom of can be greatly improved. In such a case, the substrate may be L-shaped, the iron core 2 may be attached to the surface forming one side of the substrate, and the magnetic detection element 3 may be attached to the other side. Of course, the package shape of the magnetic detection element may be changed so that the optical fiber of the magnetic detection element together with the iron core 2 can be drawn out in the same direction as the intermediate conductor on the same plane of the substrate 4.
【００１０】上述した中間導体の形態および磁気検出素
子の取付方法はそれぞれ独立に選択できるので、切換開
閉器側の構造的な制約に応じて適当な組合せ電流センサ
−を構成すればよい。Since the form of the intermediate conductor and the mounting method of the magnetic detecting element described above can be independently selected, an appropriate combination current sensor may be constructed in accordance with structural restrictions on the switching switch side.
【００１１】以下、中間導体の形態と磁気検出素子の取
付方法のバリエーションを図を用いて説明する。なお、
各図ともに図２と同様な要部断面図である。図３に示す
ものは、中間導体１０が両端にねじを設けた銅棒ででき
ている。また、磁気検出素子３０はその取付方向を磁気
検出素子３の場合と直交するようにしたパッケージとし
たもので、一端に鉄心２の取付面と直交する磁気検出素
子取付座面を設けた基板４０に取付けている。鉄心２と
磁気検出素子３０の相対的な位置関係が図１の場合に比
べて安定する。図４に示すものは、磁気光学ガラスの検
出素子が埋めこまれた側の端部に磁気検出素子３あるい
は３０とは異なる形式のマウント部材を設けた磁気検出
素子３１を図１の場合と同形の基板４に取付けたもので
ある。なお、中間導体は図１の場合と同様に絶縁電線を
用いたものを示している。光ファイバー引出方向は中間
導体１と同一方向になっている。さらに、図５に示すも
のはＬ字型の基板４１に図１の場合と同形の磁気検出素
子３を取付けたものである。なお、中間導体は図１の場
合と同様のものを示しており、光ファイバー引出方向は
図４の場合と同様に中間導体１と同一方向になってい
る。The variations of the form of the intermediate conductor and the method of attaching the magnetic detecting element will be described below with reference to the drawings. In addition,
Each drawing is a sectional view of the same main part as in FIG. In the one shown in FIG. 3, the intermediate conductor 10 is made of a copper rod provided with screws at both ends. Further, the magnetic detection element 30 is a package whose mounting direction is orthogonal to that of the magnetic detection element 3, and a substrate 40 having a magnetic detection element mounting seat surface orthogonal to the mounting surface of the iron core 2 at one end is provided. Installed on. The relative positional relationship between the iron core 2 and the magnetic detection element 30 is more stable than in the case of FIG. 4 shows a magnetic detection element 31 in which a mount member of a different type from the magnetic detection element 3 or 30 is provided at the end of the side where the detection element of the magneto-optical glass is embedded has the same shape as in FIG. It is attached to the substrate 4. The intermediate conductor is shown as an insulated wire as in the case of FIG. The optical fiber is drawn out in the same direction as the intermediate conductor 1. Further, FIG. 5 shows an L-shaped substrate 41 on which the magnetic detecting element 3 having the same shape as that of FIG. 1 is attached. The intermediate conductor is the same as in the case of FIG. 1, and the optical fiber pull-out direction is the same direction as the intermediate conductor 1 as in the case of FIG.
【００１２】[0012]
【発明の効果】この発明に係る負荷時タップ切換器用光
電流センサーは、被測定電流を流す中間導体と、この中
間導体を周回する磁路を構成し空隙を有する鉄心と、こ
の鉄心に設けた空隙内に配置して鉄心とともに中間導体
を囲繞するようになした磁気検出素子と、非磁性かつ電
気絶縁性の基板に中間導体、鉄心および磁気検出素子を
一体的に取付けているので、小型であり、負荷時タップ
切換器の切換開閉器に用いた場合、取付作業性がよく、
電流計測の精度や安定性に優れている。The photocurrent sensor for a tap changer under load according to the present invention is provided with an intermediate conductor through which a current to be measured flows, an iron core which forms a magnetic path around the intermediate conductor and has a void, and the iron core. Since the magnetic detection element is arranged in the air gap to surround the intermediate conductor together with the iron core, and the intermediate conductor, iron core and magnetic detection element are integrally mounted on the non-magnetic and electrically insulating substrate, it is possible to reduce the size. Yes, when used as a switching switch for a tap changer under load, installation workability is good,
Excellent in current measurement accuracy and stability.
【図１】 この発明の第１の実施形態を示す負荷時タッ
プ切換器用光電流センサーの平面図である。FIG. 1 is a plan view of a photocurrent sensor for a load tap changer according to a first embodiment of the present invention.
【図２】 図１に示す負荷時タップ切換器用光電流セン
サーの要部断面図である。FIG. 2 is a cross-sectional view of essential parts of the photocurrent sensor for a load tap changer shown in FIG.
【図３】 この発明による負荷時タップ切換器用光電流
センサーの変形例を示す要部断面図である。FIG. 3 is a cross-sectional view of essential parts showing a modified example of the photocurrent sensor for a load tap changer according to the present invention.
【図４】 この発明による負荷時タップ切換器用光電流
センサーの他の変形例を示す要部断面図である。FIG. 4 is a cross-sectional view of essential parts showing another modification of the photocurrent sensor for a tap changer during load according to the present invention.
【図５】 この発明による負荷時タップ切換器用光電流
センサーのさらに他の変形例を示す要部断面図である。FIG. 5 is a cross-sectional view of an essential part showing still another modified example of the photocurrent sensor for a load tap changer according to the present invention.
１ 中間導体 ２ 鉄心 ３ 磁気検出素
子 ４ 基板1 Intermediate conductor 2 Iron core 3 Magnetic detection element 4 Substrate
Claims (1)
導体を周回する磁路を構成し空隙を有する鉄心と、この
鉄心に設けた空隙内に配置して前記鉄心とともに前記中
間導体を囲繞するようになした磁気検出素子と、非磁性
かつ電気絶縁性であって前記中間導体、前記鉄心および
前記磁気検出素子を一体的に取付けた基板からなること
を特徴とする負荷時タップ切換器用光電流センサー。1. An intermediate conductor through which a current to be measured flows, an iron core that forms a magnetic path that circulates the intermediate conductor and has a void, and an intermediate core that surrounds the intermediate conductor together with the iron core disposed in the void provided in the iron core. And a magnetic detection element adapted to perform the above operation, and a non-magnetic and electrically insulating substrate integrally mounted with the intermediate conductor, the iron core and the magnetic detection element. Current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8060975A JPH09257838A (en) | 1996-03-18 | 1996-03-18 | Photocurrent sensor for on-load tap changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8060975A JPH09257838A (en) | 1996-03-18 | 1996-03-18 | Photocurrent sensor for on-load tap changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09257838A true JPH09257838A (en) | 1997-10-03 |
Family
ID=13157945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8060975A Pending JPH09257838A (en) | 1996-03-18 | 1996-03-18 | Photocurrent sensor for on-load tap changer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09257838A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2128631A1 (en) * | 2008-05-30 | 2009-12-02 | PowerSense A/S | Faraday optical current sensor arrangement |
| US8692539B2 (en) | 2006-11-30 | 2014-04-08 | Powersense A/S | Faraday effect current sensor |
| CN111551765A (en) * | 2020-06-18 | 2020-08-18 | 广州高铁计量检测股份有限公司 | On-load switch of current transformer |
| CN116577716A (en) * | 2023-07-06 | 2023-08-11 | 西安高压电器研究院股份有限公司 | Current sensor vibration characteristic testing method, related equipment and related system |
-
1996
- 1996-03-18 JP JP8060975A patent/JPH09257838A/en active Pending
Cited By (8)
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| US8692539B2 (en) | 2006-11-30 | 2014-04-08 | Powersense A/S | Faraday effect current sensor |
| EP2128631A1 (en) * | 2008-05-30 | 2009-12-02 | PowerSense A/S | Faraday optical current sensor arrangement |
| WO2009143851A1 (en) * | 2008-05-30 | 2009-12-03 | Powersense A/S | Faraday optical current sensor arrangement |
| JP2011522229A (en) * | 2008-05-30 | 2011-07-28 | パワーセンス・アクティーゼルスカブ | Faraday photocurrent sensor device |
| US8525512B2 (en) | 2008-05-30 | 2013-09-03 | Powersense A/S | Faraday optical current sensor arrangement |
| CN111551765A (en) * | 2020-06-18 | 2020-08-18 | 广州高铁计量检测股份有限公司 | On-load switch of current transformer |
| CN116577716A (en) * | 2023-07-06 | 2023-08-11 | 西安高压电器研究院股份有限公司 | Current sensor vibration characteristic testing method, related equipment and related system |
| CN116577716B (en) * | 2023-07-06 | 2023-10-20 | 西安高压电器研究院股份有限公司 | Current sensor vibration characteristic testing method, related equipment and related system |
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