JP2537898B2 - Voltage divider - Google Patents
Voltage dividerInfo
- Publication number
- JP2537898B2 JP2537898B2 JP62216818A JP21681887A JP2537898B2 JP 2537898 B2 JP2537898 B2 JP 2537898B2 JP 62216818 A JP62216818 A JP 62216818A JP 21681887 A JP21681887 A JP 21681887A JP 2537898 B2 JP2537898 B2 JP 2537898B2
- Authority
- JP
- Japan
- Prior art keywords
- insulator
- voltage
- electric wire
- capacitor
- electrode plate
- 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
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Transformers For Measuring Instruments (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、電圧変換を行う分圧器に係り、詳しくは電
線と大地間に印加された一次電圧を分圧して二次電圧を
取り出す分圧器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voltage divider that performs voltage conversion, and more particularly to a voltage divider that divides a primary voltage applied between an electric wire and ground to take out a secondary voltage. Is.
従来の技術 従来、この種の分圧器は第３図に示すような構成であ
った。第３図において、１は碍子、２はこの碍子１に設
けられた第１の導体部、３は同じく碍子１に設けられた
第２の導体部であり、第１の導体部２と第２の導体部３
は直流的に絶縁されている。また、４はとなり合う碍子
１の導体部同志を電気的に接続する導線、5,6は一次電
圧入力端子、７は中間タップで、直列接続した碍子１の
任意の接続点から二次電圧出力端子８に接続されてお
り、９は一次電圧入力端子６と接続された上記二次電圧
出力端子８と対を形成する二次電圧出力端子である。2. Description of the Related Art Conventionally, this type of voltage divider has a structure as shown in FIG. In FIG. 3, reference numeral 1 is an insulator, 2 is a first conductor portion provided on the insulator 1, 3 is a second conductor portion also provided on the insulator 1, and the first conductor portion 2 and the second conductor portion 2 Conductor part 3
Is galvanically isolated. Further, 4 is a conductor wire for electrically connecting the conductor portions of the insulator 1 which are adjacent to each other, 5 and 6 are primary voltage input terminals, and 7 is an intermediate tap, which is a secondary voltage output from an arbitrary connection point of the insulator 1 connected in series. The secondary voltage output terminal 9 is connected to the terminal 8 and forms a pair with the secondary voltage output terminal 8 connected to the primary voltage input terminal 6.
また、その他の従来例として第４図に示す電圧電流検
出器が提案されている（特開昭62-132178号公報）。第
４図において、10は碍子、11はこの碍子10の頂面より形
成される溝部、12は前記碍子10の内部の空洞部、13は前
記溝部11により前記空洞部12に形成される突出部、14は
前記突出部13とアース電極15との間に設けた浮遊電極
で、前記溝部11にはさみこまれた電線16に対し分圧器を
構成している。17は誘電体であり、前記突出部13と前記
浮遊電極14と前記アース電極15とのすきまに充てんして
あり、適当な分圧出力が得られるようになっている。18
は前記浮遊電極14と前記アース電極15とから出力される
分圧出力を検知する光電圧センサで、光ファイバ19で外
部に設けられた光源および光検出部に接続されている。
また、20は電線16に流れる電流により生じた磁界を積分
する磁性コア、21は光磁界センサで、前記電線17に流れ
る電流を検知できるようになっている。22は底板であ
り、前記碍子10を支持するピン23を備えており、電圧電
流検出器全体を電柱などに固定できるようになってい
る。As another conventional example, a voltage / current detector shown in FIG. 4 has been proposed (Japanese Patent Laid-Open No. 62-132178). In FIG. 4, 10 is an insulator, 11 is a groove formed from the top surface of the insulator 10, 12 is a cavity inside the insulator 10, 13 is a protrusion formed by the groove 11 in the cavity 12. , 14 are floating electrodes provided between the projecting portion 13 and the ground electrode 15, and constitute a voltage divider for the electric wire 16 sandwiched in the groove portion 11. Reference numeral 17 is a dielectric, which is filled in the clearance between the projecting portion 13, the floating electrode 14, and the ground electrode 15 so that an appropriate partial pressure output can be obtained. 18
Is a photovoltage sensor for detecting the divided voltage output from the floating electrode 14 and the earth electrode 15, and is connected to a light source and a photodetector provided outside by an optical fiber 19.
Further, 20 is a magnetic core that integrates the magnetic field generated by the current flowing through the electric wire 16, and 21 is an optical magnetic field sensor that can detect the current flowing through the electric wire 17. Reference numeral 22 denotes a bottom plate, which is provided with a pin 23 that supports the insulator 10, so that the entire voltage / current detector can be fixed to a utility pole or the like.
発明が解決しようとする問題点 しかし、第３図に示す従来の構成では、碍子の有する
互いに絶縁された金属導体部間の容量成分を直列接続
し、その両端に一次電圧を印加し、中間タップより二次
電圧を取り出すため、高圧電力機器へ応用する場合、分
圧器を構成する碍子に絶縁破壊が生じたり、二次電圧出
力端子が短絡すると一次電圧に対する絶縁耐力が低下
し、一次電源を短絡する事故が誘発することとなり、問
題であった。However, in the conventional configuration shown in FIG. 3, the capacitance components between the mutually insulated metal conductor portions of the insulator are connected in series, and a primary voltage is applied to both ends of the insulator to form an intermediate tap. In order to extract more secondary voltage, when applied to high-voltage power equipment, if the insulator that constitutes the voltage divider is broken down or the secondary voltage output terminal is short-circuited, the dielectric strength against the primary voltage will decrease and the primary power supply will be short-circuited. It was a problem because it caused an accident.
また、第４図に示す従来の構成では、既に敷設してあ
る電線に取付ける場合、電柱などに設置してある碍子ご
と交換する必要がある上、浮遊電極を高電圧高電流を課
電してある電線とアース電極の中間に挿入してあるの
で、構造が複雑である上、電圧電流検出器を支持してい
る碍子にヒビ割れなどが生じると短絡事故の誘因とな
り、問題であった。Further, in the conventional configuration shown in FIG. 4, when attaching to an electric wire that has already been laid, it is necessary to replace the insulator installed on a utility pole or the like, and the floating electrode is charged with high voltage and high current. Since it is inserted between a certain electric wire and the ground electrode, the structure is complicated, and if the insulator supporting the voltage / current detector is cracked, it causes a short circuit accident, which is a problem.
本発明はこのような問題点を解決するもので、短絡事
故の発生を防止でき、かつ構造が簡単で取付け容易な分
圧器を提供することを目的とするものである。The present invention solves such a problem, and an object of the present invention is to provide a voltage divider capable of preventing the occurrence of a short circuit accident, having a simple structure and being easily mounted.
問題点を解決するための手段 この問題点を解決するために本発明は、電線を支持す
る第１の絶縁物と、前記第１の絶縁物に埋め込まれ、か
つ前記第１の絶縁物を固定するための大地に接地された
金具と、前記第１の絶縁物の一部または全部と前記電線
の前記第１の絶縁物近傍を同時におおうようにして設け
た第２の絶縁物を介して設けた電極板とを有し、前記電
線と大地間に印加された一次電圧を分圧し、前記電線と
前記電極板とから二次電圧を取出す構成としたものであ
る。Means for Solving the Problems In order to solve this problem, the present invention relates to a first insulator supporting an electric wire, and embedded in the first insulator and fixing the first insulator. Provided through a metal grounded to the ground, and a second insulator provided so as to cover a part or all of the first insulator and the vicinity of the first insulator of the electric wire at the same time. And an electrode plate, which divides a primary voltage applied between the electric wire and the ground to extract a secondary voltage from the electric wire and the electrode plate.
作用 この構成により、電線と大地間に印加されている電圧
が、電線と電極板とで構成される第１のコンデンサと、
電極板と第１の絶縁物を固定するための大地に接地され
た金具とで構成される第２のコンデンサとの直列接続回
路に印加されることとなり、この第１のコンデンサと第
２のコンデンサの容量に反比例した分電圧を各コンデン
サが分担することとなり、二次電圧を第１のコンデンサ
の両端からとることにより、分圧器として作用すること
となる。また構造上、第１のコンデンサを形成する両電
極、すなわち電線と電極板は、相対的に第２のコンデン
サを形成する両電極、すなわち電極板と第１の絶縁物を
固定するための大地に接地された金具より、電極面積が
大きくかつ電極間距離が短くなる。従って、第１のコン
デンサの容量C1と第２のコンデンサの容量C2との関係
は、 C1＞C2 となる。ゆえに、第１のコンデンサと第２のコンデンサ
の分担する電圧V1，V2は、 より、 V1＜V2 となる。Action With this configuration, the voltage applied between the electric wire and the ground is the first capacitor composed of the electric wire and the electrode plate,
It is applied to a series connection circuit of a second capacitor composed of an electrode plate and a grounded metal fitting for fixing the first insulator, and the first capacitor and the second capacitor are applied. Each capacitor will share a divided voltage that is inversely proportional to the capacitance of, and by taking the secondary voltage from both ends of the first capacitor, it will act as a voltage divider. Further, structurally, both electrodes forming the first capacitor, that is, the electric wire and the electrode plate are relatively connected to both electrodes forming the second capacitor, that is, the ground for fixing the electrode plate and the first insulator. The electrode area is larger and the distance between the electrodes is shorter than that of the grounded metal fitting. Therefore, the relationship between the capacitance C 2 of the capacitance C 1 of the first capacitor second capacitor is a C 1> C 2. Therefore, the voltages V 1 and V 2 shared by the first capacitor and the second capacitor are Therefore, V 1 <V 2 .
以上のように分電圧の大半は、第２のコンデンサの電
極間にかかることとなるが、この第２のコンデンサの一
方の電極は大地に接地された第１の絶縁物の固定のため
の金具であり、他方の電極となる電極板はこの金具に対
し電線より離れた場所に設けてあるので、分圧器を構成
するために設けた電極板が一次電圧の短絡事故の原因に
ならない、信頼性の高い分圧器となる。As described above, most of the divided voltage is applied between the electrodes of the second capacitor, but one electrode of the second capacitor is a metal fitting for fixing the first insulator grounded to the ground. Since the electrode plate that serves as the other electrode is provided farther from the wire than this metal fitting, the electrode plate that is provided to configure the voltage divider does not cause a short-circuit accident of the primary voltage. It becomes a high voltage divider.
実施例 第１図は本発明の一実施例による分圧器の一部を断面
にて示す構成図であり、第２図はその等価回路である。
第１図において、24は電線の導体部、25は電線の絶縁被
覆であり、この導体部24と絶縁被覆25で電線を構成して
いる。また、26は電線を支持する第１の絶縁物、27は前
記第１の絶縁物26に埋め込まれ、かつこの第１の絶縁物
26を固定するための大地に接地された金具、28は前記第
１の絶縁物26の一部（または全部でもよい）と前記電線
の前記第１の絶縁物26の近傍を同時におおうようにして
設けた第２の絶縁物、29は前記第２の絶縁物28を介し、
かつこの第２の絶縁物28内に内包して設けた電極板、30
は前記電極板29と電気的に接続してある二次電圧出力端
子の一端、31は前記電線の導体部24に電気的に接続さ
れ、かつ前記第２の絶縁物28を前記電線に固定するバン
ドを兼ねた二次電圧出力端子の他端、32は前記第２の絶
縁物28を前記電線に固定するバンド、33は前記電線を前
記第１の絶縁物26に固定するワイヤである。そして、一
次電圧源は電線の導体部24と大地間に印加されている。Embodiment FIG. 1 is a sectional view showing a part of a voltage divider according to an embodiment of the present invention, and FIG. 2 is an equivalent circuit thereof.
In FIG. 1, reference numeral 24 is a conductor portion of an electric wire, and 25 is an insulating coating of the electric wire. The conductor portion 24 and the insulating coating 25 constitute an electric wire. Further, 26 is a first insulator for supporting the electric wire, 27 is embedded in the first insulator 26, and the first insulator is
A grounded metal fitting for fixing 26, and 28 covers part (or all) of the first insulator 26 and the vicinity of the first insulator 26 of the electric wire at the same time. The second insulator provided, 29 is provided through the second insulator 28,
Also, the electrode plate provided inside the second insulator 28, 30
Is one end of the secondary voltage output terminal electrically connected to the electrode plate 29, 31 is electrically connected to the conductor portion 24 of the electric wire, and fixes the second insulator 28 to the electric wire. The other end of the secondary voltage output terminal also serving as a band, 32 is a band for fixing the second insulator 28 to the electric wire, and 33 is a wire for fixing the electric wire to the first insulator 26. Then, the primary voltage source is applied between the conductor portion 24 of the electric wire and the ground.
以上のように構成された分圧器について、第２図の等
価回路を参照しながら、以下その動作を説明する。The operation of the voltage divider configured as described above will be described below with reference to the equivalent circuit of FIG.
第２図において、34は前記電線の導体部24と前記電極
板29とで構成された第１のコンデンサ、35は前記電極板
29と前記金具27とで構成された第２のコンデンサであ
り、この第１のコンデンサ34と第２のコンデンサ35は直
列に接続され、その両端に一次電圧源36が接続されてい
る。また、前記一次電圧源36の一端は、大地37に接地さ
れている。38は前記電線の導体部24と前記金具27とで構
成される第３のコンデンサである。従って、前記一次電
圧源36の電圧は、前記第１のコンデンサ34と前記第２の
コンデンサ35の各容量C1，C2の比に反比例した電圧で、
前記第１のコンデンサ34および第２のコンデンサ35の各
々に分担される。また、前記第３のコンデンサ38は分圧
作用に影響を及ぼすことはない。ここで、前記電極板30
と前記電線の導体部24との実効対向電極面積を10mm×57
0mmとし、実効電極間距離を30mmとし、また前記第２の
絶縁物28の比誘電率を６とすれば、前記第１のコンデン
サ34の容量C1は約10pFとなり、また前記電極板30と前記
金具27との実効対向電極面積を１×10-4〔m2〕、また実
効電極間距離を30〔mm〕とし、前記第１の絶縁物26と、
前記第２の絶縁物28の比誘電率を６とすれば、前記第２
のコンデンサ35の容量C2は約0.2pFとなり、前記第１の
コンデンサ34と前記第２のコンデンサ35の分圧比V1：V2
は1:50となり、前記一次電圧源36の一次電圧を1:50に分
圧できることとなる。また、二次電圧を第１のコンデン
サ34の両端から取出すとすると、電圧計39の入力端子間
容量等価コンデンサ40の容量値CPは、前記第１のコンデ
ンサ34の容量C1より小さいことが必要になるが、例えば
ニオブ酸リチウム単結晶のポッケルス効果を用いた電圧
センサなどを用いれば、電圧計39の入力端子間容量CPは
5pF程度に設定することは容易であり、以上の構成で一
次電圧源36の分電圧をとり出す分圧器が可能となる。In FIG. 2, 34 is the first capacitor composed of the conductor portion 24 of the electric wire and the electrode plate 29, and 35 is the electrode plate.
A second capacitor composed of 29 and the metal fitting 27. The first capacitor 34 and the second capacitor 35 are connected in series, and the primary voltage source 36 is connected to both ends thereof. Further, one end of the primary voltage source 36 is grounded to the ground 37. Reference numeral 38 is a third capacitor composed of the conductor portion 24 of the electric wire and the metal fitting 27. Therefore, the voltage of the primary voltage source 36 is a voltage inversely proportional to the ratio of the capacitances C 1 and C 2 of the first capacitor 34 and the second capacitor 35,
It is shared by each of the first capacitor 34 and the second capacitor 35. Further, the third capacitor 38 does not affect the voltage dividing action. Here, the electrode plate 30
And the effective counter electrode area between the conductor portion 24 of the electric wire and 10 mm × 57
If the distance between the effective electrodes is 30 mm and the relative permittivity of the second insulator 28 is 6, the capacitance C 1 of the first capacitor 34 is about 10 pF, and the electrode plate 30 is The effective counter electrode area with the metal fitting 27 is 1 × 10 −4 [m 2 ] and the distance between the effective electrodes is 30 [mm], and the first insulator 26 and
If the relative permittivity of the second insulator 28 is 6, the second insulator 28
The capacitance C 2 of the capacitor 35 is about 0.2 pF, and the voltage division ratio V 1 : V 2 of the first capacitor 34 and the second capacitor 35 is
Is 1:50, and the primary voltage of the primary voltage source 36 can be divided into 1:50. If the secondary voltage is taken out from both ends of the first capacitor 34, the capacitance value C P of the input terminal capacitance equivalent capacitor 40 of the voltmeter 39 may be smaller than the capacitance C 1 of the first capacitor 34. Although necessary, for example, if a voltage sensor using the Pockels effect of lithium niobate single crystal is used, the capacitance C P between the input terminals of the voltmeter 39 will be
It is easy to set the voltage to about 5 pF, and the voltage divider that extracts the divided voltage of the primary voltage source 36 is possible with the above configuration.
発明の効果 以上のように本発明によれば、電線を支持する第１の
絶縁物と、前記第１の絶縁物に埋め込まれ、かつ前記第
１の絶縁物を固定するための大地に接地された金具と、
前記第１の絶縁物の一部または全部と前記電線の前記第
１の絶縁物近傍を同時におおうようにして設けた第２の
絶縁物を介して設けた電極板とを有し、前記電線と前記
電極板とから二次電圧を取出す構成で、前記電線と大地
間の電圧を分圧する分圧器とすることにより、一次電圧
を印加する電線と大地または大地と電気的に接続された
導体との間に電気的導体がないため、絶縁距離を短縮す
ることがなく、また万一、二次出力端子が短絡しても一
次電源系に事故を誘発することがなく、事故を未然に防
止できる分圧器を提供できるという効果が得られる。EFFECTS OF THE INVENTION As described above, according to the present invention, the first insulator that supports the electric wire and the ground that is embedded in the first insulator and that fixes the first insulator are grounded. With metal fittings
A part or all of the first insulator and an electrode plate provided via a second insulator provided so as to simultaneously cover the vicinity of the first insulator of the electric wire; With a configuration for extracting a secondary voltage from the electrode plate, by a voltage divider that divides the voltage between the electric wire and the ground, the electric wire for applying the primary voltage and the ground or a conductor electrically connected to the ground Since there is no electric conductor between them, the insulation distance will not be shortened, and even if the secondary output terminal is short-circuited, no accident will be induced in the primary power supply system, and accidents can be prevented. The effect that a pressure device can be provided is obtained.
また、前記第１の絶縁物を既設の碍子で代用すること
も可能となるので、設置コストが大幅に引下げられると
いう効果も得られる。Further, since it is possible to substitute the first insulator with an existing insulator, there is an effect that the installation cost can be significantly reduced.
第１図は本発明の一実施例による分圧器の一部を断面に
て示す構成図、第２図は本発明の一実施例による分圧器
とその二次電圧出力端子に接続した電圧計との等価回路
図、第３図は従来の分圧器を示す構成図、第４図は他の
従来の分圧器を組込んだ電圧電流検知器の断面図であ
る。 24……電線の導体部、25……電線の絶縁被覆、26……第
１の絶縁物、27……金具、28……第２の絶縁物、29……
電極板、30,31……二次電圧出力端子、32……バンド、3
3……ワイヤ。FIG. 1 is a block diagram showing a part of a voltage divider according to an embodiment of the present invention in section, and FIG. 2 is a voltage divider according to an embodiment of the present invention and a voltmeter connected to a secondary voltage output terminal thereof. FIG. 3 is a configuration diagram showing a conventional voltage divider, and FIG. 4 is a sectional view of a voltage-current detector incorporating another conventional voltage divider. 24: conductor part of wire, 25: insulation coating of wire, 26 ... first insulator, 27 ... metal fitting, 28 ... second insulator, 29 ...
Electrode plate, 30, 31 …… Secondary voltage output terminal, 32 …… Band, 3
3 ... wire.
Claims (1)
の絶縁物に埋め込まれ、かつ前記第１の絶縁物を固定す
るための大地に接地された金具と、前記第１の絶縁物の
一部または全部と前記電線の前記第１の絶縁物近傍を同
時におおうようにして設けた第２の絶縁物を介して設け
た電極板とを有し、前記電線と大地間に印加された一次
電圧を分圧し、前記電線と前記電極板とから二次電圧を
取り出す構成とした分圧器。1. A first insulator for supporting an electric wire, and the first insulator.
A metal member that is embedded in the insulator and is grounded to the ground for fixing the first insulator, and a part or all of the first insulator and the vicinity of the first insulator of the electric wire. At the same time, an electrode plate provided via a second insulator provided so as to cover is provided, and a primary voltage applied between the electric wire and the ground is divided, and a secondary voltage is generated from the electric wire and the electrode plate. A voltage divider configured to take out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62216818A JP2537898B2 (en) | 1987-08-31 | 1987-08-31 | Voltage divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62216818A JP2537898B2 (en) | 1987-08-31 | 1987-08-31 | Voltage divider |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6459165A JPS6459165A (en) | 1989-03-06 |
| JP2537898B2 true JP2537898B2 (en) | 1996-09-25 |
Family
ID=16694372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62216818A Expired - Lifetime JP2537898B2 (en) | 1987-08-31 | 1987-08-31 | Voltage divider |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2537898B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6397700B2 (en) * | 2014-09-01 | 2018-09-26 | 株式会社日立産機システム | Vacuum valve pressure diagnostic device or vacuum valve device |
| CN104655896B (en) * | 2015-02-13 | 2017-11-10 | 咸阳永泰电力电子科技有限公司 | A kind of detachable alternating current-direct current divider |
| CN104655897B (en) * | 2015-02-13 | 2017-08-01 | 咸阳永泰电力电子科技有限公司 | A kind of heat loss through convection divider |
| JP6560928B2 (en) * | 2015-08-04 | 2019-08-14 | 株式会社日立産機システム | Vacuum valve pressure diagnostic device and vacuum valve device |
-
1987
- 1987-08-31 JP JP62216818A patent/JP2537898B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6459165A (en) | 1989-03-06 |
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