JPH0619383B2 - Optical current measuring device - Google Patents
Optical current measuring deviceInfo
- Publication number
- JPH0619383B2 JPH0619383B2 JP59271613A JP27161384A JPH0619383B2 JP H0619383 B2 JPH0619383 B2 JP H0619383B2 JP 59271613 A JP59271613 A JP 59271613A JP 27161384 A JP27161384 A JP 27161384A JP H0619383 B2 JPH0619383 B2 JP H0619383B2
- Authority
- JP
- Japan
- Prior art keywords
- medium
- measuring device
- optical
- current measuring
- 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.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
- G01R15/245—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect
- G01R15/246—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect based on the Faraday, i.e. linear magneto-optic, effect
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Description
【発明の詳細な説明】 〔発明の利用分野〕 本発明は光方式電流測定装置に関するものである。Description: FIELD OF THE INVENTION The present invention relates to an optical current measuring device.
従来の巻線形変成器に対して小形、耐電磁誘導、広帯域
など多くの特長を持つ光方式電圧・電流測定装置が注目
されている。このうち光方式電流測定装置は特開昭５８
−１５３１７４号公報に開示されているように、電流に
より生成された磁界中に置かれた鉛ガラス等のファラデ
ー効果を示すガラス所謂ファラデーガラス（以下、媒体
と称する）を高電圧導体に周回して設けることによっ
て、他相導体電流による影響をなくすようにしている。Optical voltage and current measuring devices, which have many features such as small size, electromagnetic induction resistance, and wide band, are drawing attention as compared with the conventional wire-wound transformer. Of these, the optical type current measuring device is disclosed in Japanese Patent Laid-Open No. 58-58.
As disclosed in Japanese Laid-Open Patent Publication No. 153174, a so-called Faraday glass (hereinafter, referred to as a medium) showing a Faraday effect such as lead glass placed in a magnetic field generated by an electric current is wound around a high voltage conductor. By providing it, the influence of the other-phase conductor current is eliminated.
すなわち同公報に示された光方式電流測定装置はセンサ
としての媒体の作用・効果が開示されたもので、媒体を
導体に巻回して取り付ける場合に、媒体に対する振動や
熱の作用に対する対策および光ファイバを高電圧側から
引き出す際の絶縁の問題等実装時の問題については言及
されていなかった。That is, the optical current measuring device disclosed in the publication discloses the action and effect of a medium as a sensor. When the medium is wound around a conductor and attached, measures against vibration and heat action on the medium and optical There was no mention of mounting problems such as insulation problems when the fiber was pulled out from the high voltage side.
すなわち導体が電流によって振動したり、発熱したりす
るため、媒体には金属容器を介して振動や熱変形による
応力が作用する。媒体にこのような応力が作用すると、
直線偏光の電流による回転の他に複屈折を生じるため、
電流の測定誤差を増大させる原因となるのである。That is, since the conductor vibrates or generates heat due to the electric current, stress due to vibration or thermal deformation acts on the medium via the metal container. When such a stress is applied to the medium,
Since birefringence occurs in addition to rotation due to the current of linearly polarized light,
This causes an increase in current measurement error.
本発明は以上の点に鑑みなされたものであり、金属容器
の振動や熱変形による測定誤差の低減が図れることは勿
論のこと金属容器と媒体との相対変位による光量変化の
ない、すなわち正確な測定が可能な光方式電流測定装置
を提供することを目的とするものである。The present invention has been made in view of the above points, of course it is possible to reduce the measurement error due to vibration and thermal deformation of the metal container, of course there is no change in the light amount due to the relative displacement of the metal container and the medium, that is, accurate It is an object of the present invention to provide an optical current measuring device capable of measurement.
すなわち本発明は電流が流れる導体を周回して設置され
る磁気光学効果を有する媒体を備えた光方式電流測定装
置において、前記媒体が、前記導体と同電位の金属容器
中に収納され、かつ前記媒体の外周壁面と金属容器の内
壁面との間隙で、媒体の対向辺のいずれか一方の間隙に
弾性物質を介在させると共に、媒体の他方辺の面は前記
金属容器の内壁に直接接触させるようにしたことを特徴
とするものであり、これによって初期の目的を達成する
ようにしたものである。That is, the present invention is an optical current measuring device provided with a medium having a magneto-optical effect, which is installed around a conductor through which a current flows, wherein the medium is contained in a metal container having the same potential as the conductor, and In the gap between the outer peripheral wall surface of the medium and the inner wall surface of the metal container, an elastic substance is interposed in either one of the opposing sides of the medium, and the surface of the other side of the medium is brought into direct contact with the inner wall of the metal container. It is characterized in that it achieves the initial purpose.
以下、図示した実施例に基づいて本発明を説明する。第
１図から第３図には本発明の一実施例が示されている。
同図に示されているように光方式電流測定装置１は電流
が流れる導体２を周回して設置される磁気光学効果を有
する媒体３および偏光子４ａ、検光子４ｂ、直角プリズ
ム４ｃを有する光学装置４を備えている。Hereinafter, the present invention will be described based on the illustrated embodiments. 1 to 3 show an embodiment of the present invention.
As shown in FIG. 1, the optical system current measuring device 1 is an optical device having a medium 3 having a magneto-optical effect and arranged around a conductor 2 through which a current flows, a polarizer 4a, an analyzer 4b, and a rectangular prism 4c. The device 4 is provided.
この光方式電流測定装置１は上述のように導体２を周回
して設けられた媒体３および光学装置４を有しており、
媒体３には偏光子４ａ、検光子４ｂおよび直角プリズム
４ｃが接着等により固着される。そしてこれら偏光子４
合、検光子４ａおよび直角プリズム４ｃの端面には、光
ファイバ９ａ、９ｂ、９ｃが接着等により固着される。
なお、金属容器５は導体２に設けたフランジ１３等によ
り取り付けられ、導体２と同電位にされる。The optical current measuring device 1 has the medium 3 and the optical device 4 which are provided around the conductor 2 as described above.
A polarizer 4a, an analyzer 4b and a right angle prism 4c are fixed to the medium 3 by adhesion or the like. And these polarizers 4
In this case, the optical fibers 9a, 9b and 9c are fixed to the end faces of the analyzer 4a and the rectangular prism 4c by adhesion or the like.
The metal container 5 is attached by a flange 13 or the like provided on the conductor 2 and is set to the same potential as the conductor 2.
本実施例では金属容器５の内壁面と媒体３の外周壁面に
間隙６を設け、この間隙６に弾性物質７を充填し、それ
に対向する側は金属容器５と直接接触するように媒体３
を収納した。そして一方、媒体３の上部にも間隙６ａを
設け、この間隙６ａにも弾性物質７を充填し、他方面側
は金属容器５と直接接触するようにした。なお、上記の
上部の弾性物質７側にはカバー１４が取り付けられてい
る。これらの間隙６、６ａに充填した弾性物質７は、例
えばシリコーンゴム等を使用した。In this embodiment, a gap 6 is provided between the inner wall surface of the metal container 5 and the outer peripheral wall surface of the medium 3, the gap 6 is filled with the elastic substance 7, and the medium 3 is directly contacted with the metal container 5 on the opposite side.
Stored. On the other hand, a gap 6a is also provided in the upper portion of the medium 3, the gap 6a is also filled with the elastic substance 7, and the other surface side is in direct contact with the metal container 5. A cover 14 is attached to the upper elastic material 7 side. As the elastic material 7 filled in the gaps 6 and 6a, for example, silicone rubber or the like is used.
なお参考までにこのように構成された光方式電流測定装
置１の作用を述べると、発光部からの光は光ファイバ９
ａを通り、偏光子４ａに入射され、直線偏光になおされ
た後に媒体３中に入射される。この媒体３に入射された
光は図中に点線で示されているように、媒体３の角に設
けられたプリズム（図示せず）で反射を繰返しながら導
体２を周回するように通過する。この場合に直線偏光の
偏光面が、導体２の電流が作る磁界により回転する。For reference, the operation of the optical-type current measuring device 1 configured as described above will be described.
After passing through a, the light is made incident on the polarizer 4a, converted into linearly polarized light, and then made incident on the medium 3. The light incident on the medium 3 passes around the conductor 2 while being repeatedly reflected by a prism (not shown) provided at the corner of the medium 3, as indicated by a dotted line in the figure. In this case, the plane of polarization of the linearly polarized light is rotated by the magnetic field created by the current of the conductor 2.
この回転した直線偏光は検光子４ｂにより互いに直交す
る２つの成分の光に分けられ、一方の光は光ファイバ９
ｂに入射され、他方の光は直角プリズム４ｃで反射され
た後に光ファイバ９ｃに入射され、共に検出器１０に送
られる。検出器１０では上述のようにこの送られてきた
光信号を電気信号に変換し、互いに直交する２つの成分
の比から直線偏光の回転すなわち導体２に流れる電流を
測定する。This rotated linearly polarized light is split by the analyzer 4b into two component light beams that are orthogonal to each other, and one of the light components is the optical fiber 9
The other light is incident on b, is reflected by the rectangular prism 4c, and then is incident on the optical fiber 9c, and is sent to the detector 10 together. The detector 10 converts the sent optical signal into an electric signal as described above, and measures the rotation of linearly polarized light, that is, the current flowing through the conductor 2 from the ratio of two components orthogonal to each other.
この場合本実施例ではこの一方の間隙６、６ａには弾性
物質７が充填されるため、導体２の振動や熱応力の媒体
３対する影響が緩和されるようになり、かつ媒体３の他
方辺の面は金属容器５の内壁に直接接触しているので、
金属容器５の媒体３との相対変位による光量変化がなく
なり、測定誤差の低減を可能とした光方式電流測定装置
１を得ることができる。In this case, in the present embodiment, the one gap 6, 6a is filled with the elastic substance 7, so that the influence of the vibration and thermal stress of the conductor 2 on the medium 3 can be alleviated, and the other side of the medium 3 can be relaxed. Since the surface of is in direct contact with the inner wall of the metal container 5,
It is possible to obtain the optical-type current measuring device 1 in which the change in the amount of light due to the relative displacement of the metal container 5 with respect to the medium 3 is eliminated and the measurement error can be reduced.
なお、このように形成された光方式電流測定装置１は実
用に際しては例えば第３図に示すように、金属シース１
２の内部には導体２が絶縁スペーサ８等によって支持・
収納される。導体２にはその電流を測定するための光方
式電流測定装置１が導体２を周回して設けられる。この
光方式電流測定装置１から出力信号は光フアイバ９によ
って金属シース１２を貫通して外部に取り出され、発光
部も合わせ持つ検出器１０に入力され、電気信号に交換
された後に端子１１から取り出されるのである。It should be noted that the optical current measuring device 1 formed in this manner is used in practice as shown in FIG.
The conductor 2 is supported inside the 2 by an insulating spacer 8 or the like.
It is stored. The conductor 2 is provided with an optical current measuring device 1 for measuring the current around the conductor 2. An output signal from the optical current measuring device 1 is taken out by the optical fiber 9 through the metal sheath 12 and is input to a detector 10 which also has a light emitting portion. It is done.
上述のように本発明によれば金属容器の振動や熱変形に
よる測定誤差の低減が図れることは勿論のこと金属容器
と媒体との相対変位による光量変化のない、すなわち正
確な測定が可能な光方式電流測定装置を得ることができ
る。As described above, according to the present invention, it is possible to reduce the measurement error due to the vibration and thermal deformation of the metal container. Of course, the light amount does not change due to the relative displacement between the metal container and the medium, that is, the light that can be accurately measured. A system current measuring device can be obtained.
第１図は本発明の光方式電流測定装置の一実施例のカバ
ーを取り外した状態を示す平面図、第２図は同じく一実
施例のカバーを取り付けた状態を示す側面図、第３図は
同じく一実施例によるガス絶縁開閉装置の縦断側面図で
ある。 １……光方式電流測定装置、２……導体、３……ファラ
デーガラス（媒体）、４……光学装置、４ａ……偏光
子、４ｂ……検光子、４ｃ……直角プリズム、５……金
属容器、６、６ａ……間隙、７……弾性物質、９、９
ａ、９ｂ、９ｃ……光ファイバ、１０……検出器、１４
……カバー。FIG. 1 is a plan view showing a state in which a cover of an embodiment of the optical system current measuring device of the present invention is removed, FIG. 2 is a side view showing a state in which a cover of the same embodiment is attached, and FIG. FIG. 3 is a vertical sectional side view of the gas insulated switchgear according to the embodiment. 1 ... Optical current measuring device, 2 ... Conductor, 3 ... Faraday glass (medium), 4 ... Optical device, 4a ... Polarizer, 4b ... Analyzer, 4c ... Right angle prism, 5 ... Metal container, 6, 6a ... Gap, 7 ... Elastic material, 9, 9
a, 9b, 9c ... optical fiber, 10 ... detector, 14
……cover.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−198358（ＪＰ，Ａ) 特開 昭58−124962（ＪＰ，Ａ) 実開 昭57−093881（ＪＰ，Ｕ) 実開 昭59−137570（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-198358 (JP, A) JP-A-58-124962 (JP, A) Actually open 57-093881 (JP, U) Actual-open Sho-59- 137570 (JP, U)
Claims (1)
気光学効果を有する媒体を備えた光方式電流測定装置に
おいて、前記媒体が、前記導体と同電位の金属容器中に
収納され、かつ前記媒体の外周壁面と金属容器の内壁面
との間隙で、媒体の対向辺のいずれか一方の間隙に弾性
物質を介在させると共に、媒体の他方辺の面は前記金属
容器の内壁に直接接触させるようにしたことを特徴とす
る光方式電流測定装置。1. An optical current measuring device provided with a medium having a magneto-optical effect, which is installed around a conductor through which a current flows, wherein the medium is contained in a metal container having the same potential as the conductor, and In the gap between the outer peripheral wall surface of the medium and the inner wall surface of the metal container, an elastic substance is interposed in either one of the opposing sides of the medium, and the surface of the other side of the medium is brought into direct contact with the inner wall of the metal container. An optical current measuring device characterized by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59271613A JPH0619383B2 (en) | 1984-12-21 | 1984-12-21 | Optical current measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59271613A JPH0619383B2 (en) | 1984-12-21 | 1984-12-21 | Optical current measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6290546A JPS6290546A (en) | 1987-04-25 |
| JPH0619383B2 true JPH0619383B2 (en) | 1994-03-16 |
Family
ID=17502509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59271613A Expired - Lifetime JPH0619383B2 (en) | 1984-12-21 | 1984-12-21 | Optical current measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619383B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69424496T2 (en) * | 1993-10-21 | 2001-01-18 | Fuji Electric Co Ltd | Optical current transformer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5793881U (en) * | 1980-11-28 | 1982-06-09 | ||
| JPS58124962A (en) * | 1982-01-21 | 1983-07-25 | Mitsubishi Electric Corp | Current measuring device |
| JPS59137570U (en) * | 1983-03-04 | 1984-09-13 | 株式会社日立製作所 | Optical current transformer mounting structure |
| JPS59198358A (en) * | 1983-04-27 | 1984-11-10 | Kansai Electric Power Co Inc:The | Photo-transformer apparatus |
-
1984
- 1984-12-21 JP JP59271613A patent/JPH0619383B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6290546A (en) | 1987-04-25 |
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