JP2003322675A - Voltage divider for measuring arc voltage of switch interrupting test - Google Patents
Voltage divider for measuring arc voltage of switch interrupting testInfo
- Publication number
- JP2003322675A JP2003322675A JP2002131061A JP2002131061A JP2003322675A JP 2003322675 A JP2003322675 A JP 2003322675A JP 2002131061 A JP2002131061 A JP 2002131061A JP 2002131061 A JP2002131061 A JP 2002131061A JP 2003322675 A JP2003322675 A JP 2003322675A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- resistor
- switch
- test
- arc
- 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
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】開閉器類の短絡試験における
アーク電圧を計測するための開閉器遮断試験アーク電圧
計測用分圧器に関する。
【０００２】
【従来の技術】遮断器等開閉器類の短絡電流遮断試験
は、図４に示すように、短絡発電機ＡＧに供試開閉器Ｃ
Ｂを接続し、供試開閉器ＣＢと並列に高圧部抵抗器ＲＨ
と低圧部抵抗器ＲＬからなる分圧器１０を接続し、低圧
部抵抗器ＲＬの両端子を測定器２に接続し、供試開閉器
ＣＢに短絡発電機ＡＧから短絡電流を流しておいて供試
開閉器ＣＢを開極させ、この供試開閉器ＣＢの開極時に
発生する極間のアーク電圧、アーク時間を測定器２で計
測している。図６にアーク電圧測定波形示す。
【０００３】
【発明が解決しようとする課題】上記分圧器１０を用い
て供試開閉器ＣＢの極間のアーク電圧、アーク時間を計
測した場合、低圧部抵抗器ＲＬから出力されるアーク電
圧の測定値は、図５に示すように供試開閉器ＣＢの遮断
部に発生する電流と同位相のアーク電圧と、供試開閉器
ＣＢの電源端子側及び接地端子側導体３、４に発生する
電流より進んだ位相のドロップ電圧の合成値となる。従
って、このアーク電圧測定値から、アーク電圧波形形態
観測、アーク電圧値計測、アークエネルギー計算等を行
う場合、分圧器出力をそのまま利用することは不可であ
る。
【０００４】そこで、予め実試験前に供試開閉器ＣＢを
閉極の状態で電流通電し、導体３、４の分圧器１０接続
点間のドロップ電圧を測定し、波形をメモリ付記録装置
に記録しておき、遮断遮断試検時の分圧器測定波形から
メモリの波形を差し引きアーク電圧波形を求める必要が
ある。あるいは、電流波形からドロップ電圧波形を予測
演算し分圧器出力波形から差し引いてアーク電圧波形を
求める必要がある。
【０００５】しかしながら、それらの方法では通電電流
値、通電開始位相等を導体３、４の分圧器１０接続点間
のドロップ電圧測定時と遮断試験時とで全く合致させる
ことは難しく、また、演算のための供試開閉器ＣＢの導
体のＬ，Ｒ成分を計測、算出が必要となる。さらに、試
験実施後に演算処理作業となるため、試験直後のアーク
電圧波形、アークエネルギー等が得られない。
【０００６】本発明は、上記課題を解決すべくなされた
ものであり、開閉器遮断試験において、アーク電圧のみ
の電圧波形が得られ前もって導体のドロップ電圧を測定
する試験が不要となる開閉器遮断試験アーク電圧計測用
分圧器を提供することを目的とする。
【０００７】
【課題を解決するための手段】本発明の開閉器遮断試験
アーク電圧計測用分圧器は、高圧部抵抗器と低圧部抵抗
器からなる分圧器において、前記高圧部抵抗器と低圧部
抵抗器の接続点に一端が接続された誘導キャンセル用抵
抗器を有することを特徴とするものである。
【０００８】
【発明の実施の形態】実施形態１
図１に本発明の実施形態１に係る開閉器遮断試験アーク
電圧計測用分圧器の接続図を示す。開閉器遮断試験アー
ク電圧計測用分圧器１は、電圧印加側高圧部抵抗器ＲＨ
１とこの高圧部抵抗器ＲＨ１と直列に接続された電圧印
加側接地アース側共通低圧部抵抗器ＲＬ１および抵抗器
ＲＨ１、ＲＬ１の接続点Ｂに一端が接続された接地アー
ス側誘導キャンセル高圧部抵抗器ＲＨ２で構成されてい
る。
【０００９】分圧器１の高圧部抵抗器ＲＨ１の高圧側端
子Ａは供試開閉器ＣＢの短絡発電機接続導体３のＥ点に
接続され、誘導キャンセル高圧部抵抗器ＲＨ２のアース
側端子Ｄは供試開閉器ＣＢ接地側導体４の接地側端の点
Ｇに接続され、低圧部抵抗器ＲＬ１のアース側端子Ｃは
接地側導体４の点Ｆに接続される。また、低圧部抵抗器
ＲＬ１の両端子（分圧器１の出力端子）を測定器２に接
続する。上記接続点Ｆ、Ｇの位置は、「ＥＦ間ドロップ
電圧＝ＦＧ間ドロップ電圧」となるようにする。
【００１０】以上のように分圧器１は接続されて使用さ
れるので、低圧部抵抗器ＲＬ１に流れるＥＦ間ドロップ
電圧による電流ｉ１とＦＧ間ドロップ電圧による電流ｉ
２が同一で逆位相となるためキャンセルされ、分圧器１
の出力はＥＦ間ドロップ電圧が含まれないアーク電圧の
みとなる。従って、このアーク電圧測定値から、アーク
電圧波形形態観測、アーク電圧値計測、アークエネルギ
ー計算等を行う場合、分圧器出力をそのまま利用するこ
とができる。図２に測定器２によるアーク電圧測定波形
を示す。
【００１１】実施形態２
図３に本発明の実施形態２に係る開閉器遮断試験アーク
電圧計測用分圧器の接続図を示す。図３の開閉器遮断試
験アーク電圧計測用分圧器１ａは、ＥＦ間ドロップ電圧
が大きすぎて「ＥＦ間ドロップ電圧＝ＦＧ間ドロップ電
圧」にできない場合に好適なものである。上記実施の形
態１（図１）の分圧器１との相違点は、分圧器の接地ア
ース側誘導チャンセル高圧部抵抗器を可変抵抗器ＲＨ２
ａとした点にある。可変抵抗器ＲＨ２ａは摺動形、切替
形等いずれのものでもよい。
【００１２】この開閉器遮断試験回路によれば、接地ア
ース側誘導チャンセル高圧部可変抵抗器ＲＨ２ａの抵抗
値を変えることにより低圧部抵抗器ＲＬ１に流れるＦＧ
間ドロップ電圧による電流ｉ２を調整することができ
る。従って、ＥＦ間ドロップ電圧が大きすぎて、「ＥＦ
間ドロップ電圧＝ＦＧ間ドロップ電圧」にできない場合
でも、この可変抵抗器ＲＨ２ａの抵抗値を変えることに
より、低圧部抵抗器ＲＬ１に流れるＥＦ間ドロップ電圧
による電流ｉ１とＦＧ間ドロップ電圧による逆位相の電
流ｉ２を同一として、低圧部抵抗器ＲＬ１に流れるＥＦ
間ドロップ電圧による電流ｉ１をＦＧ間ドロップ電圧に
よる電流ｉ２でキャンセルさせることができる。そのた
め分圧器１ａの出力は、ＥＦ間ドロップ電圧が含まれな
いアーク電圧のみとなる。
【００１３】
【発明の効果】本発明は、上述のとおり構成されている
ので、以下に記載する効果を奏する。
【００１４】（１）アーク電圧のみの電圧波形が得られ
るためアークエネルギー計算の精度向上が図られる。
（２）前もって導体のドロップ電圧を測定する試験が不
要となる。
（３）試験後の波形修正演算処理が不用のため、リアル
タイムにアーク電圧波形の観測ができる。Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a switch breaker test for measuring an arc voltage in a short circuit test of switches, and to a voltage divider for measuring an arc voltage. 2. Description of the Related Art As shown in FIG. 4, a short-circuit current breaking test for a switch such as a circuit breaker is performed by using a test switch C for a short-circuit generator AG.
B, and the high-voltage resistor RH is connected in parallel with the switch CB under test.
And a voltage divider 10 composed of a low-voltage resistor RL, both terminals of the low-voltage resistor RL are connected to the measuring instrument 2, and a short-circuit current is passed from the short-circuit generator AG to the test switch CB. The test switch CB is opened, and the arc voltage and arc time between the poles generated when the test switch CB is opened are measured by the measuring device 2. FIG. 6 shows an arc voltage measurement waveform. [0003] When the arc voltage and the arc time between the electrodes of the test switch CB are measured using the voltage divider 10, the arc voltage output from the low-voltage resistor RL is measured. The measured value is, as shown in FIG. 5, an arc voltage having the same phase as that of the current generated at the breaking portion of the switch CB, and the power supply terminal side and the ground terminal side conductors 3 and 4 of the switch CB. It becomes a composite value of the drop voltage of the phase advanced from the current. Therefore, when observing the arc voltage waveform form, measuring the arc voltage value, calculating the arc energy, and the like from the measured arc voltage value, the output of the voltage divider cannot be used as it is. Therefore, before the actual test, a current is applied to the test switch CB in a closed state, the drop voltage between the connection points of the conductors 3 and 4 at the voltage divider 10 is measured, and the waveform is stored in a recording device with a memory. It is necessary to record it and then subtract the waveform of the memory from the waveform measured by the voltage divider at the time of the shutoff test to determine the arc voltage waveform. Alternatively, it is necessary to calculate the arc voltage waveform by predicting and calculating the drop voltage waveform from the current waveform and subtracting it from the voltage divider output waveform. However, in these methods, it is difficult to completely match the energizing current value, energizing start phase, and the like between the drop voltage measurement between the connection points of the voltage dividers 10 of the conductors 3 and 4 and the cutoff test. It is necessary to measure and calculate the L and R components of the conductor of the test switch CB for the test. Further, since the operation is performed after the test, the arc voltage waveform, the arc energy, and the like immediately after the test cannot be obtained. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In a switch-break test, a voltage waveform of only an arc voltage is obtained, and a switch-break test in which a drop voltage of a conductor is not measured in advance is unnecessary. An object of the present invention is to provide a voltage divider for measuring a test arc voltage. According to the present invention, there is provided a voltage divider for measuring the arc voltage of a switch breaking test, comprising a high-voltage part resistor and a low-voltage part resistor. An induction canceling resistor having one end connected to a connection point of the resistor is provided. FIG. 1 is a connection diagram of a switch-break test arc voltage measuring voltage divider according to a first embodiment of the present invention. The switch breaking test arc voltage measuring voltage divider 1 is a high voltage resistor RH on the voltage application side.
1 and a high-side resistor RH1 connected in series with the high-side resistor RH1 and a ground-side induction canceling high-side resistor connected at one end to a connection point B between the low-side resistor RL1 and the resistors RH1 and RL1. RH2. The high-voltage side terminal A of the high-voltage resistor RH1 of the voltage divider 1 is connected to the point E of the short-circuit generator connection conductor 3 of the test switch CB, and the ground-side terminal D of the induction canceling high-voltage resistor RH2 is connected to the ground. The test switch CB is connected to the point G on the ground side end of the ground side conductor 4, and the ground terminal C of the low-voltage resistor RL 1 is connected to the point F of the ground side conductor 4. Also, both terminals of the low-voltage resistor RL1 (output terminals of the voltage divider 1) are connected to the measuring device 2. The positions of the connection points F and G are set so that “drop voltage between EF = drop voltage between FG”. As described above, since the voltage divider 1 is connected and used, the current i1 due to the drop voltage between EF and the current i due to the drop voltage between FG flowing through the low-voltage resistor RL1.
2 are canceled because they are the same but in opposite phase.
Is only the arc voltage not including the EF drop voltage. Therefore, when observing the arc voltage waveform form, measuring the arc voltage value, calculating the arc energy, and the like from the measured arc voltage value, the output of the voltage divider can be used as it is. FIG. 2 shows an arc voltage measurement waveform by the measuring device 2. Embodiment 2 FIG. 3 is a connection diagram of a switch-break test arc voltage measurement voltage divider according to Embodiment 2 of the present invention. The switch-break test arc voltage measuring voltage divider 1a shown in FIG. 3 is suitable when the drop voltage between EFs is too large to make “drop voltage between EFs = drop voltage between FGs”. The difference from the voltage divider 1 of the first embodiment (FIG. 1) is that the high-voltage resistor on the grounding-side induction channel of the voltage divider is replaced by a variable resistor RH2.
a. The variable resistor RH2a may be any type such as a sliding type and a switching type. According to this switch breaking test circuit, the FG flowing through the low-voltage resistor RL1 is changed by changing the resistance of the high-voltage variable resistor RH2a on the grounding-side induction channel.
The current i2 due to the inter-drop voltage can be adjusted. Therefore, the drop voltage between EFs is too large, and “EF
Even if it is not possible to make the “drop voltage between FG = drop voltage between FG”, by changing the resistance value of the variable resistor RH2a, the current i1 due to the EF drop voltage flowing through the low-voltage resistor RL1 and the opposite phase due to the FG drop voltage are reversed. Assuming that the current i2 is the same, the EF flowing through the low-voltage resistor RL1
The current i1 due to the inter-drop voltage can be canceled by the current i2 due to the inter-FG drop voltage. Therefore, the output of the voltage divider 1a is only the arc voltage that does not include the EF drop voltage. The present invention is configured as described above, and has the following effects. (1) Since a voltage waveform consisting of only the arc voltage is obtained, the accuracy of the arc energy calculation can be improved. (2) A test for measuring a conductor drop voltage in advance is not required. (3) Since the waveform correction calculation processing after the test is unnecessary, the arc voltage waveform can be observed in real time.
【図面の簡単な説明】
【図１】本発明の実施形態１に係る開閉器遮断試験用ア
ーク電圧計測用分圧器の接続図。
【図２】本発明によるアーク電圧測定波形図。
【図３】本発明の実施形態１に係る開閉器遮断試験用ア
ーク電圧計測用分圧器の接続図。
【図４】従来例に係る開閉器遮断試験用アーク電圧計測
用分圧器の接続図。
【図５】従来例に係る供試遮断器の電流、電圧等と分圧
器出力波形の関係説明図。
【図６】従来例にによるアーク電圧測定波形図。
【符号の説明】
１、１ａ、１０…分圧器
ＲＨ１…分圧器の高圧部抵抗器
ＲＬ１…分圧器の低圧部抵抗器
ＲＨ２…分圧器の誘導キャンセル部高圧部抵抗器
ＣＢ…供試遮断器
ＡＧ…短絡発電機BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a connection diagram of a voltage divider for measuring an arc voltage for a switch break test according to a first embodiment of the present invention. FIG. 2 is an arc voltage measurement waveform diagram according to the present invention. FIG. 3 is a connection diagram of a voltage divider for measuring an arc voltage for a switch breaking test according to the first embodiment of the present invention. FIG. 4 is a connection diagram of a voltage divider for measuring an arc voltage for a switch break test according to a conventional example. FIG. 5 is an explanatory diagram showing a relationship between a current, a voltage and the like of a test circuit breaker according to a conventional example and a voltage divider output waveform. FIG. 6 is an arc voltage measurement waveform diagram according to a conventional example. [Description of Signs] 1, 1a, 10: Voltage divider RH1 ... High-voltage resistor RL1 of the voltage divider ... Low-voltage resistor RH2 of the voltage divider ... Induction cancel unit of the voltage divider High-voltage resistor CB ... Test circuit breaker AG ... Short-circuit generator
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｇ０１Ｒ 31/333 Ｆターム(参考） 2G014 AA32 AB09 AC18 2G025 AA00 AB08 2G035 AA00 AB13 AD11 2G036 AA28 BA04 CA10 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) G01R 31/333 F-term (Reference) 2G014 AA32 AB09 AC18 2G025 AA00 AB08 2G035 AA00 AB13 AD11 2G036 AA28 BA04 CA10
Claims (1)
圧器において、 前記高圧部抵抗器と低圧部抵抗器の接続点に一端が接続
された誘導キャンセル用抵抗器を有することを特徴とす
る開閉器遮断試験アーク電圧計測用分圧器。Claims: 1. A voltage divider comprising a high-voltage resistor and a low-voltage resistor, wherein an inductive canceling resistor has one end connected to a connection point between the high-voltage resistor and the low-voltage resistor. A voltage divider for measuring an arc voltage of a switch breaking test, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002131061A JP4100035B2 (en) | 2002-05-07 | 2002-05-07 | Switch breaker test voltage divider for arc voltage measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002131061A JP4100035B2 (en) | 2002-05-07 | 2002-05-07 | Switch breaker test voltage divider for arc voltage measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003322675A true JP2003322675A (en) | 2003-11-14 |
| JP4100035B2 JP4100035B2 (en) | 2008-06-11 |
Family
ID=29543840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002131061A Expired - Fee Related JP4100035B2 (en) | 2002-05-07 | 2002-05-07 | Switch breaker test voltage divider for arc voltage measurement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4100035B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004212A (en) * | 2010-10-15 | 2011-04-06 | 中国电力科学研究院 | Equivalent load device of direct current converter valve multiple valve tests |
| CN104267297A (en) * | 2014-10-22 | 2015-01-07 | 国家电网公司 | Testing circuit, device and method for capacitor discharge speed |
| CN111089999A (en) * | 2020-02-10 | 2020-05-01 | 华北电力大学 | Parallel AC high-voltage line voltage measuring device and method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245821B (en) * | 2013-05-27 | 2015-07-01 | 安徽一天电气技术有限公司 | Wideband voltage signal acquisition device |
| US11660695B2 (en) * | 2017-03-09 | 2023-05-30 | Illinois Tool Works Inc. | Welding power supplies, wire feeders, and systems to measure a weld cable voltage drop |
| CN109752648B (en) * | 2018-12-25 | 2020-11-03 | 河北科技师范学院 | On-load tap-changer switching arc energy on-line monitoring method and device |
-
2002
- 2002-05-07 JP JP2002131061A patent/JP4100035B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004212A (en) * | 2010-10-15 | 2011-04-06 | 中国电力科学研究院 | Equivalent load device of direct current converter valve multiple valve tests |
| CN104267297A (en) * | 2014-10-22 | 2015-01-07 | 国家电网公司 | Testing circuit, device and method for capacitor discharge speed |
| CN111089999A (en) * | 2020-02-10 | 2020-05-01 | 华北电力大学 | Parallel AC high-voltage line voltage measuring device and method |
| CN111089999B (en) * | 2020-02-10 | 2021-04-13 | 华北电力大学 | Parallel AC high-voltage line voltage measuring device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4100035B2 (en) | 2008-06-11 |
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