JPS6321145B2 - - Google Patents
Info
- Publication number
- JPS6321145B2 JPS6321145B2 JP53121988A JP12198878A JPS6321145B2 JP S6321145 B2 JPS6321145 B2 JP S6321145B2 JP 53121988 A JP53121988 A JP 53121988A JP 12198878 A JP12198878 A JP 12198878A JP S6321145 B2 JPS6321145 B2 JP S6321145B2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- line
- capacitor
- insulation resistance
- high voltage
- 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
Links
- 238000009413 insulation Methods 0.000 claims description 22
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 4
- 230000006698 induction Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Description
【発明の詳細な説明】
この発明は送電線路の絶縁抵抗測定装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for measuring insulation resistance of power transmission lines.
従来より送電線路の新設又は改良、修繕工事等
が行われるときには、工事終了後送電開始に先だ
つて絶縁抵抗測定の必要があるが、実際には線路
は他回線隣接送電線からの静電、電磁誘導により
高い誘導電圧が誘起されているため絶縁抵抗を測
定することができず、それに代えて線路の誘導電
圧を測定することで線路の絶縁状態の判定を行つ
てきた。しかしながら誘導電圧の有無、大小は本
来の線路の絶縁抵抗値とは直接にかかわりなく、
安全確保上から、高い誘導電圧が発生している送
電線路でも直接絶縁抵抗値を測定する必要が生じ
ていた。 Conventionally, when new construction, improvement, or repair work is carried out on power transmission lines, it is necessary to measure insulation resistance after the construction is completed and before power transmission begins. Since insulation resistance cannot be measured because of the high induced voltage induced by induction, the insulation state of the line has been determined by measuring the induced voltage on the line instead. However, the presence or absence of induced voltage and its magnitude are not directly related to the original insulation resistance value of the line.
To ensure safety, it has become necessary to directly measure insulation resistance values even on power transmission lines where high induced voltages are generated.
この発明はこの必要性にこたえたものでその目
的とするところは測定器の一端を接地し、被測定
線路に測定器の先端を接触するだけで安全かつ簡
易に絶縁抵抗を直読できるものを得ることにあ
る。そしてこの発明は送電線路の誘導電圧が静
電、電磁誘導とも交流分であることから、交流分
の影響をのぞき、直流抵抗測定を行うことに着目
し、高電圧に耐えうる耐圧用の抵抗と直流抵抗測
定用の標準抵抗とを兼用させ、またコンデンサー
によつて交流と直流とを分離し、従来の直流抵抗
測定法によつて測定できるようにし、かつ上記抵
抗を内蔵した絶縁棒の一端にケースを介してにぎ
り棒を設けて、このにぎり棒を手で持つて線路の
絶縁抵抗を簡易かつ安全に測定できるようにした
ことを特徴とするものである。 This invention meets this need, and its purpose is to provide a device that can safely and easily read insulation resistance directly by simply grounding one end of the measuring device and touching the tip of the measuring device to the line under test. There is a particular thing. Since the induced voltage in power transmission lines is an alternating current component, both electrostatic and electromagnetic induction voltages, this invention focused on removing the influence of the alternating current component and measuring the direct current resistance. It can also be used as a standard resistor for measuring DC resistance, and a capacitor separates AC and DC so that it can be measured using the conventional DC resistance measurement method. This device is characterized in that a gripping rod is provided through the case, and the insulation resistance of the line can be easily and safely measured by holding the gripping rod in the hand.
以下この発明の実施例を図について説明する。
第１図において、１は規定の線路電圧が印加され
ている誘導電圧をひきおこす側の隣接線路、２は
隣接線路１より誘導をうけている測定対象の被測
定線路、３は被測定線路２の絶縁抵抗、４はこの
発明の測定器、５はこの測定器４に組み込まれ
た、高電圧に耐え得る耐圧用保護抵抗と絶縁抵抗
測定用の標準抵抗とを兼用した抵抗器、６はこの
抵抗器５と直列接続されたコンデンサーで、上記
抵抗器５の抵抗とこのコンデンサー６の交流商用
周波数に対するインピーダンスとの比は十分大き
くとつてある。７は上記抵抗器５の一端に接続さ
れた被測定線路２への接続用端子、８は上記コン
デンサー６の一端に接続した接地用リード端子、
９は直流高圧発生器、１０は抵抗表示の指示計、
１１はこの指示計１０の保護抵抗器で、これらの
直流高電圧発生器９、指示計１０、保護抵抗器１
１は相互に直列接続されてかつ上記コンデンサー
６に並列接続されている。なお図中Ｅは隣接線路
１の線路対地電圧、Ｉは同じく線路電流、C1は
隣接線路１と被測定線路２との間の線間静電容
量、C2は被測定線路２の対地静電容量、ｅは被
測定線路２の静電誘導電圧、Ｖは同じく電磁誘導
電圧を示すものである。 Embodiments of the present invention will be described below with reference to the drawings.
In Figure 1, 1 is the adjacent line on the side that causes the induced voltage to which a specified line voltage is applied, 2 is the line to be measured that is receiving induction from the adjacent line 1, and 3 is the line to be measured 2. Insulation resistance, 4 is a measuring device of the present invention, 5 is a resistor incorporated in this measuring device 4 and serves as a protective resistor for withstanding high voltage and a standard resistance for measuring insulation resistance, 6 is this resistor The ratio between the resistance of the resistor 5 and the impedance of the capacitor 6 to the AC commercial frequency is set to be sufficiently large. 7 is a terminal for connection to the line under test 2 connected to one end of the resistor 5; 8 is a grounding lead terminal connected to one end of the capacitor 6;
9 is a DC high voltage generator, 10 is a resistance display indicator,
11 is a protective resistor of this indicator 10, and these DC high voltage generator 9, indicator 10, protective resistor 1
1 are connected in series with each other and in parallel with the capacitor 6. In the figure, E is the line-to-ground voltage of the adjacent line 1, I is the line current, C 1 is the line-to-line capacitance between the adjacent line 1 and the line under test 2, and C 2 is the line-to-ground static of the line under test 2. The capacitance, e, is the electrostatic induction voltage of the line 2 to be measured, and V is the electromagnetic induction voltage.
この実施例の回路は以上の構成であり、被測定
線路２の絶縁抵抗を測定するには、被測定線路２
に接続用端子７を接続し、接地用リード端子８を
大地に接地すると、被測定線路２に誘導された交
流電圧は抵抗器５とコンデンサー６を通つて大地
に流される。そして上述の如く抵抗器５の抵抗と
コンデンサー６の交流商用周波数に対するインピ
ーダンスとの比を十分大きくとつてあるため、コ
ンデンサー６両端の交流誘導電圧は微少となり、
直流電圧発生器９及び指示計１０に印加される交
流電圧は実用上無視できる大きさとなる。一方こ
のコンデンサー６は直流分に対しては線路絶縁抵
抗３に比べ非常に大きなインピーダンスをもつた
め直流回路では実用上無視できる。従つて直流高
電圧発生器９より、抵抗器５、被測定線路２、絶
縁抵抗３から大地を通つて接地用リード端子８、
指示計１０、保護抵抗器１１を結ぶ直流回路が、
第２図に示す如く、形成され、直流高電圧発生器
９の発生電圧及び抵抗器５、保護抵抗器１１の抵
抗の値を一定とすればすでによく知られている直
流抵抗測定法により、指示計６は被測定線路２の
絶縁抵抗３を表示せしめることができるものであ
る。数万ボルトに達するといわれている誘導電圧
が被測定線路２に誘起されていても十分に耐圧の
高い抵抗器５を絶縁棒（後述）の内部にくみこ
み、それでもつて閃絡を防ぐとともにコンデンサ
ー６と接続することで直流抵抗の測定回路には影
響を与えない。このように抵抗器５の抵抗を、絶
縁抵抗測定の標準抵抗と高電圧である誘導電圧を
保護する耐圧用の保護抵抗とに兼用させ、さらに
コンデンサー６を第１図のように組み合わせるこ
とにより、交流誘導分の影響をのぞき直流によ
り、被測定線路２の抵抗を実用上簡易に測定する
ことができるものである。 The circuit of this embodiment has the above configuration, and in order to measure the insulation resistance of the line under test 2,
When the connecting terminal 7 is connected to the ground lead terminal 8 and the grounding lead terminal 8 is grounded to the ground, the AC voltage induced in the line to be measured 2 is passed through the resistor 5 and the capacitor 6 to the ground. As mentioned above, since the ratio between the resistance of the resistor 5 and the impedance of the capacitor 6 with respect to the AC commercial frequency is set sufficiently large, the AC induced voltage across the capacitor 6 becomes very small.
The AC voltage applied to the DC voltage generator 9 and the indicator 10 is practically negligible. On the other hand, this capacitor 6 has a much larger impedance than the line insulation resistance 3 for DC components, so it can be practically ignored in a DC circuit. Therefore, from the DC high voltage generator 9, the resistor 5, the line to be measured 2, the insulation resistance 3, and the grounding lead terminal 8,
A DC circuit connecting the indicator 10 and the protective resistor 11 is
As shown in FIG. A total of 6 can display the insulation resistance 3 of the line 2 to be measured. A resistor 5, which has a sufficiently high withstand voltage even when an induced voltage that is said to reach tens of thousands of volts is induced in the line 2 under test, is installed inside an insulating rod (described later) to prevent flashover and to connect the capacitor. 6, it does not affect the DC resistance measurement circuit. In this way, the resistance of the resistor 5 is used both as a standard resistance for measuring insulation resistance and as a protection resistor for withstand voltage to protect high induced voltage, and by combining the capacitor 6 as shown in Fig. 1, The resistance of the line to be measured 2 can be measured easily and practically using direct current, excluding the influence of alternating current induction.
この原理にもとづき具体化した本測定装置の構
造を第３図をもつて説明する。 The structure of the present measuring device, which has been realized based on this principle, will be explained with reference to FIG.
１２は被測定線路２に接触する金属製のフツク
であり、前記接続端子７に相応するものである。
１３は抵抗器５を内蔵した、高電圧に耐え得る絶
縁棒、１４は前記指示計１０、コンデンサー６、
乾電池等を内蔵する絶縁物でできたケース、１５
は安全用の金属板で、前記接地用リード端子８と
接続している。１６は前記ケース１４に設けた、
指示計１０の表示板で、前記指示計１０はこの表
示板１６に微少電流を測定し抵抗値で標示してあ
る。１７は上記金属板１５に重ねられた絶縁鍔、
１８はこの絶縁鍔１７より突出する、絶縁物から
成るにぎり棒で、このにぎり棒１８先端から前記
接地用リード端子８が導出されている。 Reference numeral 12 denotes a metal hook that comes into contact with the line to be measured 2, and corresponds to the connection terminal 7.
13 is an insulating rod that can withstand high voltage and has a built-in resistor 5; 14 is the indicator 10; a capacitor 6;
A case made of insulating material containing a dry battery, etc., 15
is a safety metal plate connected to the grounding lead terminal 8. 16 is provided in the case 14,
The indicator 10 has a display board 16 on which the indicator 10 measures a minute current and displays it as a resistance value. 17 is an insulating collar overlaid on the metal plate 15;
Reference numeral 18 denotes a gripping rod made of an insulating material that protrudes from this insulating collar 17, and the grounding lead terminal 8 is led out from the tip of this gripping rod 18.
このような構造とすることにより、送電線の鉄
塔等に接地用リード端子８を接続し、にぎり棒１
８部分をにぎつて片手でこの測定装置を保持し、
先端のフツク１２を被測定線路２に引つ掛けるだ
けで線路２に高電圧の誘導電圧があつても線路２
の絶縁抵抗３を表示板１６で直読測定できるもの
で、実用上著しい効果をあげるものである。 With this structure, the grounding lead terminal 8 can be connected to a power transmission line tower, etc., and the
Hold this measuring device with one hand while holding the 8th part,
Simply hook the hook 12 on the tip of the line 2 to the line 2 to be measured, even if there is a high induced voltage on the line 2.
The insulation resistance 3 can be directly read and measured on the display board 16, which is of great practical effect.
以上の如くこの発明は、高電圧に耐え得る耐圧
用保護抵抗と絶縁抵抗測定用の標準抵抗とを兼用
する抵抗と、コンデンサーにより被測定線路の交
流誘導分の影響をとり除き、コンデンサー両端に
直流高電圧を印加して、上記抵抗を通して被測定
線路の直流抵抗を測定するもので、このことによ
り被測定線路の誘導電圧の有無にかかわりなく簡
易かつ安全に被測定線路の絶縁抵抗を測定できる
ものである。 As described above, the present invention eliminates the influence of the AC induced component of the line under test by using a resistor that doubles as a withstand voltage protective resistor that can withstand high voltages and a standard resistor for insulation resistance measurement, and a capacitor, and a DC This method measures the direct current resistance of the line under test by applying a high voltage through the above-mentioned resistor, thereby making it possible to easily and safely measure the insulation resistance of the line under test regardless of the presence or absence of induced voltage in the line under test. It is.
またこの発明は送電線路の絶縁抵抗測定装置と
したが、送電線路に限らず、例えば発変電所等で
の高電圧機器の現場作業終了時のメガーによる確
認を、この発明の装置を使つて行えば、系統の複
雑さ等から高電圧が誘起されている部分があり、
万一誤つてそれにふれた場合でも、何等事故には
いたらない。従つて安全対策上からも高圧現場作
業用の測定器としても有効なものである。 In addition, although this invention is a device for measuring insulation resistance of power transmission lines, the device of this invention can be used not only for power transmission lines, but also for checking with a megger at the end of on-site work on high-voltage equipment at power generation and substations, etc. For example, there are parts where high voltage is induced due to the complexity of the system.
Even if you accidentally touch it, no accident will occur. Therefore, it is effective as a measuring instrument for high-voltage field work from a safety standpoint as well.
図はこの発明の一実施例を示すもので、第１図
はこの発明の回路図、第２図はこの発明の直流抵
抗測定回路図、第３図はこの発明の装置を示す正
面図である。
なお図中１は隣接線路、２は被測定線路、３は
絶縁抵抗、４は測定器、５は抵抗器、６はコンデ
ンサー、７は接続端子、８は接地用リード端子、
９は直流高電圧発生器、１０は指示計、１１は保
護抵抗器である。
The figures show one embodiment of the present invention. Figure 1 is a circuit diagram of the invention, Figure 2 is a DC resistance measuring circuit diagram of the invention, and Figure 3 is a front view showing the device of the invention. . In the figure, 1 is the adjacent line, 2 is the line to be measured, 3 is the insulation resistance, 4 is the measuring device, 5 is the resistor, 6 is the capacitor, 7 is the connection terminal, 8 is the grounding lead terminal,
9 is a DC high voltage generator, 10 is an indicator, and 11 is a protective resistor.
Claims (1)
測定用の標準抵抗とを兼用する抵抗器と、コンデ
ンサーとを直列接続し、この抵抗器の抵抗とコン
デンサーの交流商用周波数に対するインピーダン
スとの比を十分大きくとり、相互に直列接続した
直流高電圧発生器と指示計とを上記コンデンサー
に並列接続し、上記抵抗器は高電圧に耐え得る絶
縁棒に内蔵し、この絶縁棒の一端には上記コンデ
ンサー、指示計及び直流高電圧発生器夫々を内蔵
した、絶縁物から成るケースを固定し、このケー
スの一端には絶縁物から成るにぎり棒を固定し、
上記絶縁棒の他端には被測定線路に係止するフツ
クを設け、また上記コンデンサーの一端と接続し
た接地用端子を上記ケース又はにぎり棒に設けた
ことを特徴とする送電線路絶縁抵抗測定装置。1 Connect a capacitor in series with a resistor that serves both as a protective resistor for withstanding high voltage and as a standard resistor for measuring insulation resistance, and calculate the ratio of the resistance of this resistor to the impedance of the capacitor at AC commercial frequency. A sufficiently large DC high voltage generator and an indicator connected in series are connected in parallel to the capacitor, the resistor is built into an insulating rod that can withstand high voltage, and the capacitor is connected to one end of the insulating rod. , a case made of an insulating material containing an indicator and a DC high voltage generator is fixed, and a gripping rod made of an insulating material is fixed to one end of the case,
A power transmission line insulation resistance measuring device characterized in that the other end of the insulating rod is provided with a hook for locking onto the line to be measured, and the case or gripping rod is provided with a grounding terminal connected to one end of the capacitor. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12198878A JPS55116276A (en) | 1978-10-05 | 1978-10-05 | Insulation resistance measuring device for power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12198878A JPS55116276A (en) | 1978-10-05 | 1978-10-05 | Insulation resistance measuring device for power transmission line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55116276A JPS55116276A (en) | 1980-09-06 |
| JPS6321145B2 true JPS6321145B2 (en) | 1988-05-02 |
Family
ID=14824776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12198878A Granted JPS55116276A (en) | 1978-10-05 | 1978-10-05 | Insulation resistance measuring device for power transmission line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55116276A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5821868U (en) * | 1981-08-03 | 1983-02-10 | 株式会社トクヤマ | High voltage insulation resistance measuring device |
| JP2010115560A (en) * | 2010-03-05 | 2010-05-27 | Sanyo Product Co Ltd | Game controller |
| JP5183674B2 (en) * | 2010-05-27 | 2013-04-17 | 中国電力株式会社 | Insulation performance monitoring device and insulation performance monitoring method |
| JP7319624B2 (en) * | 2019-02-27 | 2023-08-02 | 東北電力株式会社 | Clamp-type current measuring instrument |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS476395U (en) * | 1971-02-17 | 1972-09-21 |
-
1978
- 1978-10-05 JP JP12198878A patent/JPS55116276A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS476395U (en) * | 1971-02-17 | 1972-09-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55116276A (en) | 1980-09-06 |
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