JPH07114086B2 - Support insulator with photocurrent sensor - Google Patents
Support insulator with photocurrent sensorInfo
- Publication number
- JPH07114086B2 JPH07114086B2 JP63108259A JP10825988A JPH07114086B2 JP H07114086 B2 JPH07114086 B2 JP H07114086B2 JP 63108259 A JP63108259 A JP 63108259A JP 10825988 A JP10825988 A JP 10825988A JP H07114086 B2 JPH07114086 B2 JP H07114086B2
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- insulator
- photocurrent sensor
- insulator body
- optical fiber
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4416—Heterogeneous cables
- G02B6/4417—High voltage aspects, e.g. in cladding
- G02B6/442—Insulators
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Insulators (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は送電線や変電所において、線路や母線等の導体
を絶縁支持させるとともに、導体に流れる電流を検出す
るために用いられる光電流センサ付き支持碍子に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a photocurrent sensor used in a transmission line or a substation to electrically support a conductor such as a line or a bus and to detect a current flowing through the conductor. It is related to a supporting insulator.
（従来の技術） 送電線、変電所等において線路や母線等に流れる電流を
検出するためには従来から碍子型CT（変流器）が用いら
れているが、このために余分な設置スペースや設備費が
必要となるうえ、CTの出力は電気信号として取出される
ため周囲の電界や磁界の影響によるノイズが入り易い等
の問題があった。(Prior art) Insulator-type CT (current transformer) has been conventionally used to detect the current flowing through lines and busbars in power transmission lines, substations, etc. In addition to requiring equipment costs, the CT output is taken out as an electric signal, so there is a problem that noise is likely to enter due to the influence of the surrounding electric field and magnetic field.
（発明が解決しようとする課題） 本発明は上記のような従来の問題点を解決して、余分な
設置スペースを全く必要とせず、しかも周囲の電界や磁
界の影響を受けずに線路や母線等の電流を検出すること
ができる光電流センサ付き支持碍子を目的として完成さ
れたものである。(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, requires no extra installation space at all, and is free from the influence of the surrounding electric field and magnetic field, and the lines and busbars. It was completed for the purpose of a supporting insulator with a photocurrent sensor capable of detecting currents such as.
（課題を解決するための手段） 本発明は光ファイバを内蔵させた碍子本体の下端に導体
を支持する導体クランプを設けるとともに、碍子本体の
下面と導体クランプとの間には導体に流れる電流を検知
し光ファイバを通じて光信号として出力する光電流セン
サを取付け、更に碍子本体の下端には導体を囲んで平行
に延びるシールド部材（14）を設けたことを特徴とする
ものである。(Means for Solving the Problem) The present invention provides a conductor clamp for supporting a conductor at the lower end of an insulator body containing an optical fiber, and a current flowing through the conductor between the lower surface of the insulator body and the conductor clamp. A photocurrent sensor for detecting and outputting as an optical signal through an optical fiber is attached, and a shield member (14) surrounding the conductor and extending in parallel is provided at the lower end of the insulator body.
（実施例） 次に本発明を図示の実施例とともに更に詳細に説明す
る。(Example) Next, the present invention will be described in more detail together with the illustrated example.
第１図は第１の実施例を示すもので、（１）は碍子本
体、（２）はその上端に設けられた碍子支持金具、
（３）は碍子本体（１）の下端に設けられた導体クラン
プである。碍子本体（１）の中心部には貫通孔（４）が
形成されており、その内部に光ファイバ（５）が例えば
シリコン樹脂のような封着材（６）によって封着されて
いる。なお熱膨脹による封着材（６）の変形を防止する
ため、貫通孔（４）の上下の端面をテーパ状に拡げると
ともに、封着材（６）の端部に円錐状の突出部（７）を
形成しておくことが好ましい。FIG. 1 shows a first embodiment, (1) is an insulator main body, (2) is an insulator support fitting provided at the upper end thereof,
(3) is a conductor clamp provided at the lower end of the insulator body (1). A through hole (4) is formed in the center of the insulator body (1), and an optical fiber (5) is sealed inside by a sealing material (6) such as silicone resin. In order to prevent deformation of the sealing material (6) due to thermal expansion, the upper and lower end surfaces of the through hole (4) are expanded in a tapered shape, and a conical protrusion (7) is formed at the end of the sealing material (6). Is preferably formed.
本実施例の導体クランプ（３）を碍子本体（１）の下面
と接する上面側に凹部（８）を持つとともに、下面側に
導体（９）をクランプするためのクランプ片（10）を備
えたもので、そのフランジ部（11）をＯリング（11a）
を介して碍子金具（12）とボルト締めすることにより碍
子本体（１）の下端に強固に取付けられている。The conductor clamp (3) of the present example has a recess (8) on the upper surface side which contacts the lower surface of the insulator body (1), and a clamp piece (10) for clamping the conductor (9) on the lower surface side. O-ring (11a) on the flange (11)
It is firmly attached to the lower end of the insulator main body (1) by bolting it to the insulator metal fitting (12) via.
このような導体クランプ（３）と碍子本体（１）の下面
との間に、導体（９）を流れる電流を検出するための光
電流センサ（13）が取付けられている。光電流センサ
（13）としては電流を光信号に変換することができる機
能を持つYIG、BSOなどのファラディ素子が用いられてい
る。これらの素子は磁界による偏光面の回転を利用して
電流を検出するものであり、前述した光ファイバ（６）
によって光入力と光信号の取出しが行われる。本実施例
においては光電流センサ（13）は封着材（６）の突出部
（７）に埋込まれている。またこの突出部（７）の下端
を導体クランプ（３）の凹部（８）の上面に当接させ、
熱膨脹により光電流センサ（13）及び光ファイバ（６）
が軸方向に移動することを防止している。このような構
造としておけば光電流センサ（13）を気密状態に保つこ
とができるとともに、センサ部分のコンパクト化を図る
ことができる利点がある。A photocurrent sensor (13) for detecting a current flowing through the conductor (9) is attached between the conductor clamp (3) and the lower surface of the insulator body (1). As the photocurrent sensor (13), a Faraday element such as YIG or BSO having a function of converting a current into an optical signal is used. These elements detect the current by utilizing the rotation of the plane of polarization by the magnetic field, and the above-mentioned optical fiber (6)
The optical input and the optical signal extraction are carried out by. In this embodiment, the photocurrent sensor (13) is embedded in the protrusion (7) of the sealing material (6). The lower end of the protrusion (7) is brought into contact with the upper surface of the recess (8) of the conductor clamp (3),
Photocurrent sensor (13) and optical fiber (6) due to thermal expansion
Is prevented from moving in the axial direction. With such a structure, the photocurrent sensor (13) can be kept in an airtight state, and the sensor portion can be made compact.
更に碍子本体（１）の下端には強磁性体からなるシール
ド部材（14）が取付けられている。シールド部材（14）
は導体（９）を囲んで導体（９）と平行に延びるかまぼ
こ型のものであるが、その紙面と平行な両端面は磁界の
影響がないために開放されたままとなっている。Further, a shield member (14) made of a ferromagnetic material is attached to the lower end of the insulator body (1). Shield member (14)
Is a semi-cylindrical type that surrounds the conductor (9) and extends parallel to the conductor (9), but both end faces parallel to the paper surface are left open because there is no influence of the magnetic field.
なお（15）は碍子本体（１）の上端に設けられた気密室
であり、図示のように碍子取付板（16）よりも上方へ突
出させて碍子の全長が長くなることを防止している。Reference numeral (15) is an airtight chamber provided at the upper end of the insulator body (1), and as shown in the figure, it is projected above the insulator mounting plate (16) to prevent the insulator from becoming long. .
第２図は本発明の第２の実施例を示すもので、第１の実
施例とは導体クランプ（３）の内部に鉄心（3a）を設
け、この鉄心（3a）内に光電流センサ（13）を埋込んだ
点が異なっている。この鉄心（3a）は磁力線を光電流セ
ンサ（13）に集中させる役割を持つのみならずシールド
部材（14）としても機能し、外部の磁界が光電流センサ
（13）に影響を及ぼすことを防止している。このような
構造とすることにより第１の実施例よりも更に小型化と
軽量化を図ることができるが、その他の構造は第１の実
施例と同様であるので共通する部分に同一の番号を付し
て説明を省略する。FIG. 2 shows a second embodiment of the present invention, which is different from the first embodiment in that an iron core (3a) is provided inside a conductor clamp (3) and a photocurrent sensor (3a) is provided in the iron core (3a). The difference is that 13) is embedded. This iron core (3a) not only has the role of concentrating the magnetic lines of force on the photocurrent sensor (13) but also functions as a shield member (14), preventing the external magnetic field from affecting the photocurrent sensor (13). is doing. With such a structure, it is possible to further reduce the size and weight of the first embodiment, but other structures are the same as those of the first embodiment, and therefore, the same reference numerals are given to common portions. The description is omitted.
（作用） このように構成されたものは、碍子本体（１）の下端の
導体クランプ（３）により導体（９）を支持させて用い
られるものであり、この導体（９）に流れる電流によっ
て導体（９）の周囲に発生する磁界が碍子本体（１）の
下端と導体クランプ（３）との間に設けられた光電流セ
ンサ（13）によって光信号に変換され、この光信号が碍
子本体（１）に内蔵された光ファイバ（５）を通じて碍
子本体（１）の上端から取出される。このように本発明
の光電流センサ付き支持碍子によれば、導体（９）を支
持する支持碍子自体に光電流センサ（13）を取付けて電
流検出機能を持たせたので、従来のCTを用いた場合に比
較して余分の設置スペースが不要となり、また設備費も
大幅に引下げることができる。更に本発明においては、
光電流センサ（13）の出力を光ファイバ（５）を通じて
光信号として取出すため、電気信号として取出していた
従来のものに比較して周囲の電流によるノイズを減少さ
せることができる。しかも本発明においては導体（９）
を囲むようにシールド部材（14）が設けられているの
で、他の相を流れる電流による磁界の影響を完全に防止
することができ、正確な電流検出が可能である。また本
発明の光電流センサ付き支持碍子は光電流センサ（13）
を碍子本体（１）の下面と導体クランプ（３）との間に
埋込み、碍子本体（１）の下面と導体（９）との間のク
リアランスを小さくしたので、碍子装柱の設計を変更す
る必要がない利点もある。(Operation) The structure thus configured is used by supporting the conductor (9) by the conductor clamp (3) at the lower end of the insulator body (1), and the conductor is caused by the current flowing through the conductor (9). The magnetic field generated around (9) is converted into an optical signal by the photocurrent sensor (13) provided between the lower end of the insulator body (1) and the conductor clamp (3), and this optical signal is converted into an insulator body ( It is taken out from the upper end of the insulator body (1) through the optical fiber (5) built in 1). As described above, according to the support insulator with a photocurrent sensor of the present invention, the photocurrent sensor (13) is attached to the support insulator itself which supports the conductor (9) so as to have a current detection function. Compared to the case where it was used, no extra installation space is required, and the facility cost can be significantly reduced. Further in the present invention,
Since the output of the photocurrent sensor (13) is taken out as an optical signal through the optical fiber (5), the noise due to the surrounding current can be reduced as compared with the conventional one taken as an electric signal. Moreover, in the present invention, the conductor (9)
Since the shield member (14) is provided so as to surround the, it is possible to completely prevent the influence of the magnetic field due to the current flowing through the other phase, and it is possible to accurately detect the current. The support insulator with a photocurrent sensor of the present invention is a photocurrent sensor (13).
Is embedded between the lower surface of the insulator body (1) and the conductor clamp (3) to reduce the clearance between the lower surface of the insulator body (1) and the conductor (9), so the design of the insulator pole is changed. There is also an advantage that it is not necessary.
（発明の効果） 本発明は以上の説明からも明らかなように、支持碍子自
体に電流検出機能を持たせることにより余分な設置スペ
ースを全く必要とせずに導体を流れる電流を検出するこ
とができ、しかも周囲を流れる電流による電界や磁界に
よってノイズを受けることなく正確に電流の検出を行う
ことができるものである。従って本発明は従来の問題点
を一掃した光電流センサ付き支持碍子として、産業の発
展に寄与するところは極めて大である。(Effects of the Invention) As is apparent from the above description, the present invention makes it possible to detect a current flowing through a conductor without requiring any extra installation space by providing the support insulator itself with a current detection function. Moreover, the current can be accurately detected without receiving noise due to the electric field or magnetic field due to the current flowing around. Therefore, the present invention, as a supporting insulator with a photocurrent sensor that eliminates the conventional problems, has a great contribution to the industrial development.
第１図は本発明の第１の実施例を示す断面図、第２図は
第２の実施例を示す断面図である。 （１）：碍子本体、（３）：導体クランプ、（５）：光
ファイバ、（９）：導体、（13）：光電流センサ、（1
4）：シールド部材。FIG. 1 is a sectional view showing a first embodiment of the present invention, and FIG. 2 is a sectional view showing a second embodiment. (1): Insulator main body, (3): Conductor clamp, (5): Optical fiber, (9): Conductor, (13): Photocurrent sensor, (1
4): Shield member.
Claims (1)
（１）の下端に導体（９）を支持する導体クランプ
（３）を設けるとともに、碍子本体（１）の下面と導体
クランプ（３）との間には導体（９）に流れる電流を検
知し光ファイバ（５）を通じて光信号として出力する光
電流センサ（13）を取付け、更に碍子本体（１）の下端
には導体（９）を囲んで平行に延びるシールド部材（1
4）を設けたことを特徴とする光電流センサ付き支持碍
子。1. A conductor clamp (3) for supporting a conductor (9) is provided at a lower end of an insulator body (1) containing an optical fiber (5), and a lower surface of the insulator body (1) and a conductor clamp (3). ) Is attached with a photocurrent sensor (13) that detects the current flowing in the conductor (9) and outputs it as an optical signal through the optical fiber (5), and the conductor (9) is attached to the lower end of the insulator body (1). A shield member (1
4) A supporting insulator with a photocurrent sensor characterized by being provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63108259A JPH07114086B2 (en) | 1988-04-30 | 1988-04-30 | Support insulator with photocurrent sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63108259A JPH07114086B2 (en) | 1988-04-30 | 1988-04-30 | Support insulator with photocurrent sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01279519A JPH01279519A (en) | 1989-11-09 |
| JPH07114086B2 true JPH07114086B2 (en) | 1995-12-06 |
Family
ID=14480120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63108259A Expired - Lifetime JPH07114086B2 (en) | 1988-04-30 | 1988-04-30 | Support insulator with photocurrent sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07114086B2 (en) |
-
1988
- 1988-04-30 JP JP63108259A patent/JPH07114086B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01279519A (en) | 1989-11-09 |
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