JPH10188699A - Insulator contamination monitoring device - Google Patents
Insulator contamination monitoring deviceInfo
- Publication number
- JPH10188699A JPH10188699A JP8348759A JP34875996A JPH10188699A JP H10188699 A JPH10188699 A JP H10188699A JP 8348759 A JP8348759 A JP 8348759A JP 34875996 A JP34875996 A JP 34875996A JP H10188699 A JPH10188699 A JP H10188699A
- Authority
- JP
- Japan
- Prior art keywords
- insulator
- leakage current
- contamination
- pilot
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1245—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、着塩による碍子の
汚損状態を監視する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for monitoring the state of contamination of insulators caused by salting.
【０００２】[0002]
【従来の技術】海沿い（海塩汚損地区）に設置される変
電所、電気機器などに使用される碍子は、その表面に塩
分が付着して汚損されることがある。この汚損を放置し
ておくと、碍子表面において絶縁破壊が生じて閃絡が起
こり、電力供給不能などの重大な事故に発展するおそれ
がある。したがって、碍子汚損による事故を未然に防ぐ
ために、着塩による碍子の汚損状態を監視し、汚損があ
る程度まで進んだところで碍子の洗浄を行う必要があ
る。2. Description of the Related Art Insulators used for substations, electric equipment, and the like installed along the sea (sea salt contaminated area) may be contaminated by salt attached to the surface thereof. If this contamination is left untreated, dielectric breakdown occurs on the surface of the insulator, causing flashover, which may lead to a serious accident such as inability to supply power. Therefore, in order to prevent accidents due to insulator contamination, it is necessary to monitor the state of contamination of the insulator due to salt deposition and to wash the insulator when the contamination has progressed to a certain extent.
【０００３】通常の碍子の汚損度測定は、支持碍子の表
面の一部を刷毛又は筆などで拭き取り、拭き取った塩分
を規定の容量の純水に溶け込ませる。その後、塩分を溶
け込ませた溶液の伝導度を測定し、間接的に塩分付着量
を推定する。In a usual measurement of the degree of contamination of an insulator, a part of the surface of the support insulator is wiped with a brush or a brush, and the wiped salt is dissolved in a specified volume of pure water. Thereafter, the conductivity of the solution in which the salt is dissolved is measured, and the amount of salt attached is indirectly estimated.
【０００４】[0004]
【発明が解決しようとする課題】この汚損度測定方法
は、定期的に調査をする必要がある上、調査に時間及び
手間がかかる。特に、遠方にある変電所などでの碍子に
対する調査は困難となる。また、活線状態において高電
圧が印加されている碍子表面を拭き取る作業は危険でも
あり、煩雑な停電作業が必要となる。In this method of measuring the degree of contamination, it is necessary to carry out a regular survey, and the survey requires time and effort. In particular, it is difficult to investigate insulators at distant substations. In addition, the work of wiping the surface of the insulator to which a high voltage is applied in a live state is dangerous, and a complicated power outage work is required.
【０００５】本発明は、常時、簡単な方法で汚損状態の
監視が可能な、碍子の汚損状態監視装置を提供すること
を目的とするものである。SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus for monitoring the state of contamination of an insulator, which can always monitor the state of contamination by a simple method.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記目的を達
成するためなされたものである。本発明の碍子汚損監視
装置は、パイロット碍子を具備し、このパイロット碍子
を汚損状態を監視しようとする碍子と同一環境に配置す
る。したがって、このパイロット碍子は監視対象の碍子
と同様に汚損が進行する。SUMMARY OF THE INVENTION The present invention has been made to achieve the above object. The insulator contamination monitoring device of the present invention includes a pilot insulator and arranges the pilot insulator in the same environment as the insulator whose contamination state is to be monitored. Therefore, this pilot insulator is fouled like the insulator to be monitored.
【０００７】このパイロット碍子の高圧部に電源装置に
より電圧を印加し、この電圧印加によりパイロット碍子
の表面に流れる漏れ電流を、漏れ電流検出診断により検
出する。この電源装置により印加される電圧は、人体に
危険のない値とされる。そして、この検出した漏れ電流
の値に基づいて、診断手段によりパイロット碍子の汚損
状態を診断する。この診断手段は、例えば、パイロット
碍子の汚損状態が所定レベルに達したと診断した時、外
部に対して出力を行う。[0007] A voltage is applied to the high voltage portion of the pilot insulator by a power supply device, and a leakage current flowing on the surface of the pilot insulator due to the application of the voltage is detected by a leakage current detection diagnosis. The voltage applied by this power supply device has a value that does not pose a danger to the human body. Then, based on the detected value of the leakage current, the diagnostic means diagnoses the contamination state of the pilot insulator. This diagnostic means outputs to the outside, for example, when it is diagnosed that the contamination state of the pilot insulator has reached a predetermined level.
【０００８】この碍子汚損監視装置によれば、常時、碍
子の汚損状態を監視することができる。したがって、遠
隔地にある碍子であっても、格別な負担なく、その汚損
状態を監視することができる。[0008] According to the insulator contamination monitoring device, the insulator contamination state can be constantly monitored. Therefore, even if the insulator is located at a remote place, the contamination state of the insulator can be monitored without any particular burden.
【０００９】[0009]
【発明の実施の形態】本発明の実施形態について図を用
いて説明する。図１において、１はパイロット碍子であ
る。２は、そのパイロット碍子１を搭載した漏れ電流検
出部である。３は、漏れ電流検出部２と別個に設けられ
た診断部である。Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a pilot insulator. Reference numeral 2 denotes a leakage current detection unit on which the pilot insulator 1 is mounted. Reference numeral 3 denotes a diagnosis unit provided separately from the leakage current detection unit 2.
【００１０】漏れ電流検出部２は、接地された金属製の
容器２１に、絶縁物２２を介してパイロット碍子１を搭
載する。容器２１内にＤＣ−ＡＣ変換器２３及びＤＣ−
ＤＣ変換器２４が設けられ、それぞれの入力側に直流電
源が供給される。ＤＣ−ＡＣ変換器２３から出力される
交流電源は、変圧器Ｔにより３０〜１０ｖ程度の人体に
危険のない電圧に変換されて、限流抵抗ｒ1 を通してパ
イロット碍子１の高圧部１１に印加される。The leakage current detector 2 mounts the pilot insulator 1 on a grounded metal container 21 via an insulator 22. The DC-AC converter 23 and the DC-
A DC converter 24 is provided, and DC power is supplied to each input side. AC power outputted from the DC-AC converter 23 is converted into a non-hazardous voltage to the human body of about 30~10v by the transformer T, it is applied through current limiting resistor r 1 to the high pressure portion 11 of the pilot insulator 1 You.
【００１１】パイロット碍子１の表面に流れる漏れ電流
を検出するため、パイロット碍子１の低圧部１３と接地
間に、変流器ＣＴの１次巻線が接続される。変流器ＣＴ
の２次巻線に直流分カット用コンデンサＣを介して発光
ダイオードＬＥＤが接続される。発光ダイオードＬＥＤ
のインピーダンスを低下させるため、ＤＣ−ＤＣ変換器
２４から、抵抗ｒ2 を介して直流電流が供給される。To detect a leakage current flowing on the surface of pilot insulator 1, a primary winding of current transformer CT is connected between low-voltage section 13 of pilot insulator 1 and ground. Current transformer CT
The light emitting diode LED is connected to the secondary winding via a DC component cutting capacitor C. Light emitting diode LED
To reduce the impedance, the DC-DC converter 24, a DC current is supplied through the resistor r 2.
【００１２】発光ダイオードＬＥＤの出力光は、光ファ
イバ２６を通して診断部３の光−電変換器３１に伝達さ
れる。光−電変換器３１の出力側には、コンパレータ３
２と表示器３３が接続される。コンパレータ３２は、光
−電変換器３１から出力された検出信号とレベル設定さ
れた基準値とを比較し、碍子の汚損度が所定値以上とな
ったと診断すると、接点３４を閉じて外部に対して出力
する。The output light of the light emitting diode LED is transmitted to the photoelectric converter 31 of the diagnostic unit 3 through the optical fiber 26. On the output side of the photoelectric converter 31, a comparator 3
2 and the display 33 are connected. The comparator 32 compares the detection signal output from the photoelectric converter 31 with a reference value set at a level, and when it is diagnosed that the degree of contamination of the insulator has reached a predetermined value or more, the contact 32 is closed and the outside is closed. Output.
【００１３】次に、汚損状態検出装置の動作について説
明する。パイロット碍子１を搭載した漏れ電流検出部２
は、汚損状態を監視しようとする碍子の近傍に配置され
る。これにより、パイロット碍子１は監視対象の碍子と
同様に汚損が進行することとなる。パイロット碍子１の
高圧部１１に電圧が印加されることにより、パイロット
碍子１の表面に漏れ電流が流れる。この漏れ電流の値
は、パイロット碍子１の汚損度が低いときは小さく、汚
損度が高いときは大きくなる。Next, the operation of the contamination state detecting device will be described. Leakage current detector 2 equipped with pilot insulator 1
Is placed near the insulator whose contamination state is to be monitored. As a result, the pollution of the pilot insulator 1 proceeds in the same manner as the monitored insulator. When a voltage is applied to the high voltage portion 11 of the pilot insulator 1, a leakage current flows on the surface of the pilot insulator 1. The value of the leakage current is small when the degree of contamination of pilot insulator 1 is low, and is large when the degree of contamination is high.
【００１４】この漏れ電流は変流器ＣＴにより検出さ
れ、発光ダイオードＬＥＤに漏れ電流に応じた電流が流
れる。通常、発光ダイオードＬＥＤは、漏れ電流のよう
な微小電流に対しては高インピーダンスを示すが、発光
ダイオードＬＥＤには、ＤＣ−ＤＣ変換器２４からバイ
アス電流が流されているため、１Ω以下の低インピーダ
ンスとなり、漏れ電流が流れ易くなっている。したがっ
て、変流器ＣＴの変流比を適当に選択することにより、
発光ダイオードＬＥＤは、数１０nA程度の微小な漏れ電
流に応じた光信号を出力することができるようになる。This leakage current is detected by the current transformer CT, and a current corresponding to the leakage current flows through the light emitting diode LED. Normally, the light emitting diode LED shows a high impedance with respect to a small current such as a leakage current. However, since a bias current is supplied from the DC-DC converter 24 to the light emitting diode LED, a low impedance of 1Ω or less is applied. It becomes impedance, and the leakage current is easy to flow. Therefore, by appropriately selecting the current transformer ratio of the current transformer CT,
The light emitting diode LED can output an optical signal corresponding to a small leakage current of about several tens nA.
【００１５】この出力光は、光ファイバ２６により診断
部３の光−電変換器３１に伝達され、漏れ電流値に応じ
た値の電気信号に変換される。この電気信号は、表示器
３３に入力されて、漏れ電流の値が表示される。また、
コンパレータ３２に入力されて、基準値と比較される。
この基準値は、漏れ電流と碍子汚損度との関係を示す換
算表に基づいて予めレベル設定されている。The output light is transmitted by the optical fiber 26 to the photoelectric converter 31 of the diagnostic section 3 and is converted into an electric signal having a value corresponding to the leakage current value. The electric signal is input to the display 33, and the value of the leakage current is displayed. Also,
The data is input to the comparator 32 and compared with a reference value.
This reference value is set in advance on the basis of a conversion table showing the relationship between the leakage current and the degree of insulator contamination.
【００１６】パイロット碍子１の汚損度が高くなり、漏
れ電流値が基準値を超えたとき、コンパレータ３２はそ
の接点３４を閉じて、外部に対して警報などを行うため
の出力を行う。次に、上記実施形態の変形例について説
明する。図２は、パイロット碍子１と漏れ電流検出部２
をスペーサ２７を介して高所に設置する例を示す。この
例によれば、パイロット碍子１を監視対象の碍子と同一
高さに配置することができるために、両碍子の汚損状態
を等しいものとすることができる。When the degree of contamination of the pilot insulator 1 increases and the leakage current value exceeds a reference value, the comparator 32 closes its contact 34 and outputs an alarm for the outside. Next, a modification of the above embodiment will be described. FIG. 2 shows a pilot insulator 1 and a leakage current detector 2
Is installed at a high place via a spacer 27. According to this example, since the pilot insulator 1 can be arranged at the same height as the insulator to be monitored, the contamination of both insulators can be equalized.
【００１７】図３は、パイロット碍子１を単なる円筒形
のパイロット碍子１２にした例を示す。パイロット碍子
には、低圧の電圧が供給されるだけであるから、図１及
び図２に示すような高圧用の碍子を使用する必要はな
い。したがって、このような円筒形碍子を使用すること
により、装置のコストを下げることができる。ただし、
両碍子の塩分の付着状態をできるだけ等しくするために
は、図１、図２に示す高圧用碍子を使用することが好ま
しい。FIG. 3 shows an example in which the pilot insulator 1 is a simple cylindrical pilot insulator 12. Since only a low voltage is supplied to the pilot insulator, it is not necessary to use a high-voltage insulator as shown in FIGS. Therefore, the cost of the device can be reduced by using such a cylindrical insulator. However,
In order to make the state of adhesion of salt between both insulators as equal as possible, it is preferable to use the high-voltage insulator shown in FIGS.
【００１８】パイロット碍子１，１２と漏れ電流検出部
２と診断部３とは一体的に構成することもできる。ま
た、パイロット碍子１，１２を漏れ電流検出部２とは別
体にして設置することもできる。パイロット碍子１，１
２を着脱可能に取り付けることにより、碍子を取り外し
て行う汚損度の測定を実行することができる。汚損状態
検出装置により碍子が汚損度されたと診断したとき、装
置の電源をオフとし、パイロット碍子１，１２を取り外
して純水に浸け、その溶液の伝導度を測定する。この方
法によれば、さらに正確に汚損度の測定を行うことがで
きる。The pilot insulators 1 and 12, the leakage current detecting section 2 and the diagnostic section 3 can be integrally formed. Further, the pilot insulators 1 and 12 can be installed separately from the leakage current detection unit 2. Pilot insulator 1,1
By detachably attaching 2, the measurement of the degree of contamination performed by removing the insulator can be performed. When it is diagnosed that the insulator is polluted by the fouling state detecting device, the power of the device is turned off, the pilot insulators 1 and 12 are removed and immersed in pure water, and the conductivity of the solution is measured. According to this method, the degree of contamination can be measured more accurately.
【００１９】漏れ電流検出部２に供給する電源は、直流
電源に代えて交流電源とすることができる。この場合、
ＤＣ−ＡＣ変換器２３とＤＣ−ＤＣ変換器２４は、それ
ぞれ、ＡＣ−ＡＣ変換器、ＡＣ−ＤＣ変換器に変更され
る。上記実施形態においては、表示器３３に漏れ電流値
を表示させているが、コンパレータ３２としてＣＰＵ又
はリニアライザを使用して、漏れ電流値から汚損度を計
算し、コンパレータ３２の出力側に表示器３３を設け
て、表示器３３に直接汚損度を表示するようにすること
もできる。The power supplied to the leakage current detector 2 can be an AC power supply instead of a DC power supply. in this case,
The DC-AC converter 23 and the DC-DC converter 24 are changed to an AC-AC converter and an AC-DC converter, respectively. In the above-described embodiment, the leakage current value is displayed on the display 33. However, the degree of contamination is calculated from the leakage current value using a CPU or a linearizer as the comparator 32, and the display 33 is displayed on the output side of the comparator 32. May be provided to directly display the degree of contamination on the display 33.
【００２０】パイロット碍子の表面が乾燥していると、
同一汚損度であった場合でも、乾燥していない状態と比
較すると漏れ電流が少なくなる。このため、乾燥時に
は、汚損状態の正確な診断ができないこととなる。これ
に対処するため、パイロット碍子の表面に結露をさせる
ための手段を設け、強制的に碍子の表面に結露をさせて
から、漏れ電流の検出を行うようにすることができる。When the surface of the pilot insulator is dry,
Even in the case of the same degree of contamination, the leakage current is reduced as compared with the state where it is not dried. For this reason, at the time of drying, an accurate diagnosis of the stained state cannot be made. In order to cope with this, it is possible to provide a means for dew condensation on the surface of the pilot insulator, and forcibly cause dew condensation on the surface of the insulator to detect the leakage current.
【００２１】具体的には、パイロット碍子１、１２の内
部に熱媒体（油、フロンなど）を入れて、ペルチェクー
ラの冷却により碍子表面を冷やして強制的に結露をさせ
る。このようにすると、表面が凍結する場合にはペルチ
ェクーラに逆に電流を流し、加熱することもできる。い
ずれも、湿度、温度センサの併用による制御が好しい。
あるいは、現地に行くことが簡単な場合は、霧吹きなど
で純水をパイロット碍子１の表面に吹きつける。このと
きパイロット碍子１には、３０〜１０Ｖ程度の人体に危
険のない電圧が印加されているのみであるから、作業者
は安全に作業を行うことができる。このようにして碍子
の表面を濡らすことで、汚損度に正確に対応した漏れ電
流を流すことができる。濡れは、自動動作の加湿器や、
キリ吹き器によるものでもよい。Specifically, a heat medium (oil, chlorofluorocarbon, etc.) is put in the pilot insulators 1 and 12, and the insulator surface is cooled by cooling the Peltier cooler to forcibly form dew condensation. In this way, when the surface freezes, a current can be applied to the Peltier cooler in reverse to heat the Peltier cooler. In any case, control using a humidity and temperature sensor in combination is preferable.
Alternatively, when it is easy to go to the site, pure water is sprayed on the surface of the pilot insulator 1 by spraying. At this time, since only a voltage of about 30 to 10 V that is not dangerous to the human body is applied to the pilot insulator 1, the worker can work safely. By wetting the surface of the insulator in this way, it is possible to flow a leakage current accurately corresponding to the degree of contamination. Wetting is automatically operated humidifier,
A drill blower may be used.
【００２２】なお、監視対象とされている課電中の碍子
にも、碍子の汚損状態に応じた漏れ電流が流れているの
であるから、この漏れ電流を測定して汚損状態を監視す
る方法が考えられる。しかしながら、その方法では、汚
損度測定中に碍子の表面を濡らす作業が安全に行えない
という問題が生じる。また、碍子を取り外して行う測定
作業も、碍子が大型であることにより困難となる。これ
に対し、本発明では、これらの問題点を解決することが
できる。Since a leakage current according to the contamination state of the insulator flows through the insulator under power supply which is a monitoring target, a method of monitoring the contamination state by measuring the leakage current is known. Conceivable. However, this method has a problem that the work of wetting the surface of the insulator during the measurement of the degree of contamination cannot be performed safely. Also, the measurement operation performed by removing the insulator becomes difficult due to the large size of the insulator. On the other hand, the present invention can solve these problems.
【図１】本発明の実施形態における汚損状態監視装置の
構成を示す図。FIG. 1 is a diagram showing a configuration of a contamination state monitoring device according to an embodiment of the present invention.
【図２】図１のパイロット碍子の変形例を示す図（その
１）。FIG. 2 is a view showing a modification of the pilot insulator of FIG. 1 (part 1).
【図３】図１のパイロット碍子の変形例を示す図（その
２）。FIG. 3 is a view showing a modified example of the pilot insulator of FIG. 1 (part 2).
１…パイロット碍子 １１…高圧部 １２…円筒形碍子 ２…漏れ電流検出部 ２１…金属容器 ２２…絶縁物 ２３…ＤＣ−ＡＣ変換器 ２４…ＤＣ−ＤＣ変換器 ２６…光ファイバ ２７…スペーサ ３…診断部 ３１…光−電変換器 ３２…コンパレータ ３３…表示器 ３４…接点 ＣＴ…変流器 ＬＥＤ…発光ダイオード DESCRIPTION OF SYMBOLS 1 ... Pilot insulator 11 ... High voltage part 12 ... Cylindrical insulator 2 ... Leakage current detection part 21 ... Metal container 22 ... Insulator 23 ... DC-AC converter 24 ... DC-DC converter 26 ... Optical fiber 27 ... Spacer 3 ... Diagnosis unit 31 ... Opto-electric converter 32 ... Comparator 33 ... Display unit 34 ... Contact CT ... Current transformer LED ... Light emitting diode
Claims (2)
環境に配置されるパイロット碍子と、このパイロット碍
子の高圧部に電圧を印加する電源装置と、前記パイロッ
ト碍子の表面に流れる漏れ電流を検出する手段と、この
漏れ電流検出手段が検出した漏れ電流の値に基づいて前
記パイロット碍子の汚損状態を診断する手段とを具備す
ることを特徴とする碍子汚損監視装置。1. A pilot insulator arranged in the same environment as an insulator whose contamination state is to be monitored, a power supply device for applying a voltage to a high voltage portion of the pilot insulator, and detecting a leakage current flowing on the surface of the pilot insulator. And means for diagnosing the contamination state of the pilot insulator based on the value of the leakage current detected by the leakage current detection means.
るための手段を具備する請求項１記載の碍子汚損監視装
置。2. The insulator fouling monitoring device according to claim 1, further comprising means for dew condensation on the surface of the pilot insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34875996A JP3757508B2 (en) | 1996-12-26 | 1996-12-26 | Eggplant contamination monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34875996A JP3757508B2 (en) | 1996-12-26 | 1996-12-26 | Eggplant contamination monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10188699A true JPH10188699A (en) | 1998-07-21 |
| JP3757508B2 JP3757508B2 (en) | 2006-03-22 |
Family
ID=18399178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34875996A Expired - Fee Related JP3757508B2 (en) | 1996-12-26 | 1996-12-26 | Eggplant contamination monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3757508B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009291046A (en) * | 2008-05-30 | 2009-12-10 | Fukuoka Institute Of Technology | Power supply line monitor and its net system |
| CN108519545A (en) * | 2018-06-05 | 2018-09-11 | 沈阳工业大学 | It is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision and method |
| CN108550445A (en) * | 2018-05-08 | 2018-09-18 | 河南森源电气股份有限公司 | A kind of electrification shows support insulator and switchgear |
| CN109358261A (en) * | 2018-12-13 | 2019-02-19 | 陕西科技大学 | A kind of wireless remote monitoring device of insulator leakage current |
| CN111693830A (en) * | 2020-05-28 | 2020-09-22 | 广州广华智电科技有限公司 | Insulator on-line detection equipment and system |
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| US10161987B2 (en) | 2014-09-29 | 2018-12-25 | Mitsubishi Electric Corporation | Insulation degradation monitoring device |
| EP3929607A1 (en) * | 2018-12-11 | 2021-12-29 | Abb Schweiz Ag | Switchgear leakage current monitoring system for a high voltage or medium voltage switchgear |
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1996
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009291046A (en) * | 2008-05-30 | 2009-12-10 | Fukuoka Institute Of Technology | Power supply line monitor and its net system |
| JP4691713B2 (en) * | 2008-05-30 | 2011-06-01 | 学校法人福岡工業大学 | Power supply line monitoring device and its net system |
| CN108550445A (en) * | 2018-05-08 | 2018-09-18 | 河南森源电气股份有限公司 | A kind of electrification shows support insulator and switchgear |
| CN108550445B (en) * | 2018-05-08 | 2023-11-21 | 河南森源电气股份有限公司 | Live display post insulator and switch cabinet |
| CN108519545A (en) * | 2018-06-05 | 2018-09-11 | 沈阳工业大学 | It is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision and method |
| CN108519545B (en) * | 2018-06-05 | 2023-08-08 | 沈阳工业大学 | High-voltage insulator surface flashover experimental device and method under extremely cold condition |
| CN109358261A (en) * | 2018-12-13 | 2019-02-19 | 陕西科技大学 | A kind of wireless remote monitoring device of insulator leakage current |
| CN111693830A (en) * | 2020-05-28 | 2020-09-22 | 广州广华智电科技有限公司 | Insulator on-line detection equipment and system |
| CN111693830B (en) * | 2020-05-28 | 2023-02-28 | 广州广华智电科技有限公司 | Insulator on-line detection equipment and system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3757508B2 (en) | 2006-03-22 |
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