JPS63186512A - Grounding device for compact switchgear - Google Patents
Grounding device for compact switchgearInfo
- Publication number
- JPS63186512A JPS63186512A JP62014207A JP1420787A JPS63186512A JP S63186512 A JPS63186512 A JP S63186512A JP 62014207 A JP62014207 A JP 62014207A JP 1420787 A JP1420787 A JP 1420787A JP S63186512 A JPS63186512 A JP S63186512A
- Authority
- JP
- Japan
- Prior art keywords
- grounding
- grounding device
- container
- electrode
- impedance
- 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.)
- Granted
Links
- 230000005856 abnormality Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 5
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Gas-Insulated Switchgears (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は縮小形開閉装置の容器内に発生する部分放電を
検出する接地装置に関するものでおる。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a grounding device for detecting partial discharge occurring within a container of a reduced-sized switchgear.
「従来の技術」
近年、ＳＦ６などの絶縁媒体を封入した、ガス絶縁開閉
装置が多く使用されるようになってきた。"Prior Art" In recent years, gas insulated switchgears filled with an insulating medium such as SF6 have come into widespread use.
このガス絶縁開閉装置は容器を密封しである為、内部を
容易に点検できないという欠点がある。This gas-insulated switchgear has the disadvantage that the container is sealed, so the inside cannot be easily inspected.
このため、容器内部の高圧導体や絶縁物から発生する部
分放電を検出して内部の異常を知る方法が用いられてい
る。For this reason, a method is used to detect internal abnormalities by detecting partial discharges generated from high-voltage conductors and insulators inside the container.
第４図、第５図は従来の部分放電測定方法を示すもので
あり、第４図は容器１に断路器２、接地装置３、高圧導
体４など収納し、絶縁スペーサ５によって絶縁支持され
ている。4 and 5 show a conventional partial discharge measuring method. In FIG. 4, a disconnector 2, a grounding device 3, a high voltage conductor 4, etc. are housed in a container 1, and are insulated and supported by an insulating spacer 5. There is.
絶縁スペーサ５は７ランジ６の近傍に電極７が全周又は
略仝周に亘り埋め込まれており、端子８を介して外部に
引出されている。The insulating spacer 5 has an electrode 7 embedded in the vicinity of the 7 flange 6 over the entire circumference or approximately the circumference thereof, and is led out to the outside via the terminal 8.
このような構成において、絶縁スペーサ５の劣化や、断
路器２のシールドリンク９を固定するボルト１０のゆる
みなどにより高圧充電部に部分放電が発生すると、絶縁
スペーサ５に埋め込まれた高圧導体４ａと、電極７によ
り形成された静電容量１１を介して電極７に部分放電に
よる電位変化が生じる。In such a configuration, if partial discharge occurs in the high-voltage charging part due to deterioration of the insulating spacer 5 or loosening of the bolt 10 that fixes the shield link 9 of the disconnector 2, the high-voltage conductor 4a embedded in the insulating spacer 5 and , a potential change occurs in the electrode 7 via the capacitance 11 formed by the electrode 7 due to partial discharge.
この電位変化を良否の判定基準とする測定装置１２を端
子８に接続すれば、縮小形開閉装＠１３内部の異常を検
出することができる。By connecting the measuring device 12, which uses this potential change as a criterion for determining pass/fail, to the terminal 8, it is possible to detect an abnormality inside the reduced type switchgear @13.
また、第５図は接地装置３の接地側電極１４を容器１か
ら絶縁板１５により絶縁支持し、接地回路を密封端子１
６を介して容器１の外に引出したものにおいて、常時使
用状態では密封端子１６と大地を図示してない接地線で
接続してあり、測定時には接地線を取外し、図に示すよ
うに密封端子１６を測定用端子として用いる。In addition, FIG. 5 shows that the grounding side electrode 14 of the grounding device 3 is insulated and supported from the container 1 by an insulating plate 15, and the grounding circuit is connected to the sealed terminal 1.
6, the sealed terminal 16 is connected to the ground by a ground wire (not shown) in normal use, and when measuring, the ground wire is removed and the sealed terminal 16 is connected to the ground as shown in the figure. 16 is used as a measurement terminal.
このような構造において前記同様に部分放電が発生する
と、接地装置３の接地側電極１４と高圧充電部側の固定
電極１４ａにより形成された静電容量１］を介して接地
側電極１４に、部分放電による電位変化が生じる。In such a structure, when a partial discharge occurs in the same manner as described above, a partial discharge occurs to the grounding side electrode 14 via the capacitance 1 formed by the grounding side electrode 14 of the grounding device 3 and the fixed electrode 14a on the high voltage charging part side. Potential changes occur due to discharge.
この変化を前記測定装置１２を密封端子１６に接続すれ
ば、縮小形開閉装置１３内部の異常を検出することがで
きる。By connecting this change to the measuring device 12 to the sealed terminal 16, it is possible to detect an abnormality inside the reduced type switchgear 13.
Ｕ発明が解決しようとする問題点Ｊ
このような検出装置において第４図の例では異常検出の
ための特殊な電極７が必要でおる。Problems to be Solved by the Invention J In such a detection device, the example shown in FIG. 4 requires a special electrode 7 for abnormality detection.
また、第５図の例では異常検出のための専用電極は不要
であるが、接地回路の開放を伴なうので安全性に問題を
残すことになる。Further, in the example shown in FIG. 5, a dedicated electrode for abnormality detection is not required, but since the grounding circuit is opened, a safety problem remains.
「問題点を解決するための手段」
部分放電により発生するノイズの周波数成分が数１０ｋ
Ｈｚ〜数１００ｋＨｚと高く、商用周波数と比較して大
差がある事に看目し、周波数に略比例したインピーダン
スを持つ素子を測定用端子と大地間に挿入し、接地装置
の接地側電極を検出電極として利用すれば、専用の検出
電極が不要となり、また接地回路も商用周波数に対して
は常時接地状態となるため、安全性も高くなる。"Means to solve the problem" The frequency component of the noise generated by partial discharge is several 10k
Noting that the frequency is high, ranging from Hz to several 100 kHz, and there is a large difference compared to the commercial frequency, an element with an impedance approximately proportional to the frequency was inserted between the measurement terminal and the ground to detect the ground side electrode of the grounding device. If used as an electrode, there is no need for a dedicated detection electrode, and the grounding circuit is always grounded for commercial frequencies, increasing safety.
「実施例」 第１図は本発明の実施例を示す構造図である。"Example" FIG. 1 is a structural diagram showing an embodiment of the present invention.
尚、従来技術と同一部分については同一符号を付し、重
複する説明を省略する。Note that the same parts as in the prior art are given the same reference numerals, and redundant explanation will be omitted.
容器１に取付けられた密封端子１６には測定端子１８を
装着し、インピーダンス素子１９を介して大地に接続さ
れた接地線１７が接続されている。A measurement terminal 18 is attached to a sealed terminal 16 attached to the container 1, and a grounding wire 17 connected to the earth via an impedance element 19 is connected thereto.
インピーダンス素子１９のもつインピーダンスＺは
Ｚ＝Ｋｆ Ｋ＝定数、ｆ＝周波数の関係を有して
いる。又、商用周波数におけるインピーダンスＺは、接
地回路の接地抵抗に対して十分小さな値となるように設
定されている。この様な構造で、高圧充電部に部分放電
が発生すると、静電容量１１を介して部分放電による微
小電流は接地側電極１４→密封端子１６→測定端子１８
→インピーダンス素子１９→測定端子１８ａ→接地線１
７→大地に流入する。The impedance Z of the impedance element 19 has the relationship Z=Kf, K=constant, and f=frequency. Further, the impedance Z at the commercial frequency is set to be a sufficiently small value with respect to the grounding resistance of the grounding circuit. With such a structure, when a partial discharge occurs in the high-voltage charging part, the minute current due to the partial discharge flows through the capacitance 11 from the grounding electrode 14 to the sealed terminal 16 to the measurement terminal 18.
→ Impedance element 19 → Measurement terminal 18a → Ground wire 1
7 → Flows into the earth.
このとき、インピーダンス素子１９は部分放電のように
高周波性のノイズに対しては前記関係よノリ十分高いイ
ンピーダンスを示す。その結果、インピーダンス素子１
９の両端に、端子電圧Ｖとして発生する。At this time, the impedance element 19 exhibits a sufficiently high impedance with respect to high-frequency noise such as partial discharge according to the above relationship. As a result, impedance element 1
9 is generated as a terminal voltage V.
尚、商用周波数の成分についてはインピーダンスが十分
に小さいので、端子電圧ＶはほぼＯになる。Note that since the impedance of the commercial frequency component is sufficiently small, the terminal voltage V becomes approximately O.
従って、インピーダンス素子１つの両端の電圧を測定装
置１２により測定する事により、縮小形開閉装置内部の
異常を検出することができる。Therefore, by measuring the voltage across one impedance element using the measuring device 12, it is possible to detect an abnormality inside the reduced type switchgear.
又、接地装置３を投入し、高圧充電部を接地した場合で
も、そのときに流れる商用周波電流に対してはインピー
ダンス素子１９のインピーダンスは充分小さく接地回路
の電位が上昇することはない。Further, even when the grounding device 3 is turned on and the high-voltage charging section is grounded, the impedance of the impedance element 19 is sufficiently small against the commercial frequency current flowing at that time, and the potential of the grounding circuit does not rise.
第２図はインピーダンス素子１９にコイル１９ａを用い
た場合、第３図はインピーダンス素子１９にフェライト
系コア１９ｂを用いた場合の例である。FIG. 2 shows an example where a coil 19a is used as the impedance element 19, and FIG. 3 shows an example where a ferrite core 19b is used as the impedance element 19.
「発明の効果」
以上説明したように本発明によれば、専用の検出電極を
設けることなく、また接地回路の開放がないため安全で
、経済的に内部の異常を検出する事ができる。[Effects of the Invention] As explained above, according to the present invention, internal abnormalities can be safely and economically detected without providing a dedicated detection electrode and without opening the ground circuit.
第１図は本発明のインピーダンス素子を設けた接地装置
、第２図、第３図はインピーダンス素子の構成例を示す
図である。第４図、第５図は従来の内部異常検出方法を
示す構造図である。
図において
１は容器
３は接地装置
５は絶縁スペーサ
７は電極
１４は接地側電極
１６は密封端子
１９はインピーダンス素子
である。FIG. 1 is a grounding device provided with an impedance element of the present invention, and FIGS. 2 and 3 are diagrams showing configuration examples of the impedance element. FIGS. 4 and 5 are structural diagrams showing a conventional internal abnormality detection method. In the figure, 1 indicates a container 3, a grounding device 5, an insulating spacer 7, an electrode 14, a grounding electrode 16, and a sealed terminal 19, which are impedance elements.
Claims (1)
置等の開閉器を収納した、縮小形開閉装置において、前
記接地装置の接地側電極を容器より絶縁支持すると共に
、接地回路を絶縁媒体を封止可能な密封端子を介して容
器外に引き出し、前記密封端子と大地とを接続する接地
線の途中に、商用周波数では無視できる程度でかつ略周
波数に比例するインピーダンスを有する素子を挿入した
事を特徴とする縮小形開閉装置の接地装置。In a reduced-sized switchgear in which a switch such as a circuit breaker, a disconnector, a grounding device, etc. is housed in a container filled with an insulating medium, the grounding side electrode of the grounding device is insulated from the container, and the grounding circuit is insulated. The medium is drawn out of the container through a sealable sealed terminal, and an element having an impedance that is negligible at commercial frequencies and approximately proportional to the frequency is inserted in the middle of a grounding wire that connects the sealed terminal and the ground. A grounding device for a reduced type switchgear characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62014207A JPH0787653B2 (en) | 1987-01-26 | 1987-01-26 | Abnormality detection device for reduction type switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62014207A JPH0787653B2 (en) | 1987-01-26 | 1987-01-26 | Abnormality detection device for reduction type switchgear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63186512A true JPS63186512A (en) | 1988-08-02 |
| JPH0787653B2 JPH0787653B2 (en) | 1995-09-20 |
Family
ID=11854657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62014207A Expired - Fee Related JPH0787653B2 (en) | 1987-01-26 | 1987-01-26 | Abnormality detection device for reduction type switchgear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0787653B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02246709A (en) * | 1989-03-16 | 1990-10-02 | Toshiba Corp | Operation ascertainment detector for compressed-gas-insulated earth device |
| US6250856B1 (en) | 1997-02-28 | 2001-06-26 | Kabushiki Kaisha Miyanaga | Quick attachment structure for drill shank |
| US8858133B2 (en) | 2007-12-11 | 2014-10-14 | C4 Carbides Limited | Cutting apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5627808U (en) * | 1979-08-08 | 1981-03-16 | ||
| JPS5658708A (en) * | 1979-10-15 | 1981-05-21 | Mitsubishi Electric Corp | Grounding device |
-
1987
- 1987-01-26 JP JP62014207A patent/JPH0787653B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5627808U (en) * | 1979-08-08 | 1981-03-16 | ||
| JPS5658708A (en) * | 1979-10-15 | 1981-05-21 | Mitsubishi Electric Corp | Grounding device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02246709A (en) * | 1989-03-16 | 1990-10-02 | Toshiba Corp | Operation ascertainment detector for compressed-gas-insulated earth device |
| US6250856B1 (en) | 1997-02-28 | 2001-06-26 | Kabushiki Kaisha Miyanaga | Quick attachment structure for drill shank |
| US8858133B2 (en) | 2007-12-11 | 2014-10-14 | C4 Carbides Limited | Cutting apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0787653B2 (en) | 1995-09-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |