JPH04177710A - Abnormality diagnosis device of gas insulation equipment - Google Patents
Abnormality diagnosis device of gas insulation equipmentInfo
- Publication number
- JPH04177710A JPH04177710A JP2303885A JP30388590A JPH04177710A JP H04177710 A JPH04177710 A JP H04177710A JP 2303885 A JP2303885 A JP 2303885A JP 30388590 A JP30388590 A JP 30388590A JP H04177710 A JPH04177710 A JP H04177710A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- temperature
- moisture
- water content
- insulator
- 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.)
- Pending
Links
- 238000003745 diagnosis Methods 0.000 title claims abstract description 25
- 230000005856 abnormality Effects 0.000 title claims abstract description 20
- 238000009413 insulation Methods 0.000 title abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000012212 insulator Substances 0.000 abstract description 30
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 238000003795 desorption Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
Landscapes
- Transformer Cooling (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
Description
【発明の詳細な説明】
「発明の１」的］
（産業上の利用分野）
本発明は、絶縁ガスが封入された変圧器、リアクトル等
のガス絶縁機器の異常診断装置に関する。DETAILED DESCRIPTION OF THE INVENTION [First aspect of the invention] (Industrial Application Field) The present invention relates to an abnormality diagnosis device for gas insulated equipment such as transformers and reactors filled with insulating gas.
（従来の技術）
一般にガス絶縁機器では、局部加熱等により封入ガス中
に水分が発生する。この水分量が増える程、封入ガスの
絶縁性能は劣化し、それによって絶縁機器内部でコロナ
放電が発生して封入ガスか分解され、白−害なガスを発
生するという問題がある。そのため、封入ガス中の水分
量又は分解ガス量を定期的に測定し、前記問題を事前に
防ぐための異常診断を行うことが必要である。その従来
例を第３図に示す。ガス絶縁機器のタンク１内には巻線
２及び鉄心３からなる変圧器中身が収納されていると共
に、絶縁ガス４（例えばＳＦ、、ガス）が封入されてい
る。そして、タンク１には絶縁ガス４の水分量を測定す
る水分センサ５が取りイ・１けてあり、この水分センサ
５の出力信号がモニター６に入力される。このモニター
６では、水分センサ５て測定された水分量Ｗ ｂ （９
６）を、絶縁ガス４中の許容水分ｍＷａ（％）と比較し
、Ｗａ≧Ｗｂならば正常、Ｗ ａ ＜ Ｗ ｂならば異
常という判定を行う様になっている。(Prior Art) Generally, in gas insulated equipment, moisture is generated in the sealed gas due to local heating or the like. As the moisture content increases, the insulation performance of the sealed gas deteriorates, causing corona discharge to occur inside the insulated equipment, decomposing the sealed gas, and producing a white, harmful gas. Therefore, it is necessary to periodically measure the amount of moisture in the sealed gas or the amount of decomposed gas, and perform abnormality diagnosis to prevent the above-mentioned problems in advance. A conventional example is shown in FIG. A tank 1 of a gas insulated device houses the contents of a transformer including a winding 2 and an iron core 3, and is also filled with an insulating gas 4 (for example, SF gas). The tank 1 is equipped with a moisture sensor 5 for measuring the moisture content of the insulating gas 4, and the output signal of the moisture sensor 5 is input to a monitor 6. In this monitor 6, the moisture content W b (9
6) is compared with the allowable moisture mWa (%) in the insulating gas 4, and if Wa≧Wb, it is determined to be normal, and if Wa<Wb, it is determined to be abnormal.
（発明が解決しようとする課題）
しかしながら上記従来構成は次の様な欠点を有していた
。(Problems to be Solved by the Invention) However, the above conventional configuration had the following drawbacks.
ガス絶縁機器内に使用されている絶縁物は、−般に繊維
系の物質により形成されているため、絶縁物自身の温度
に応じて周囲の絶縁ガス４中の水分や分解ガスを吸脱６
゛する性質がある。従って、絶縁ガス４の温度か低くな
ると、絶縁ガス４中の水分が絶縁物に吸容されて、絶縁
ガス４中の水分量が減少し、反対に、絶縁ガス４の温度
が高くなると、絶縁物中の水分が絶縁ガス４中に放出さ
れて、絶縁ガス４中の水分量が増加するようになる。Insulators used in gas-insulated equipment are generally made of fiber-based materials, so they absorb and desorb moisture and decomposed gas in the surrounding insulating gas 4 depending on the temperature of the insulator itself.
There is a tendency to Therefore, when the temperature of the insulating gas 4 becomes low, the moisture in the insulating gas 4 is absorbed by the insulator, and the amount of moisture in the insulating gas 4 decreases.On the other hand, when the temperature of the insulating gas 4 becomes high, the insulating material The moisture in the object is released into the insulating gas 4, and the amount of moisture in the insulating gas 4 increases.
このため、水分センサ５により測定した絶縁ガス４中の
水分量の測定値が同じでも、温度か異なれば、絶縁物が
吸脱着する水分量か異なるため、例えば温度が低い場合
には、水分センサ５により測定した絶縁ガス４中の水分
量の測定値がｌｉ’ｌ容水分子ｆｉＷａ（％）以下であ
っても、実際には、絶縁物中の水分量が許容水分量を超
えてしまう事態が起こり得る。従って、絶縁ガス４中の
水分量を測定するたけては、ガス絶縁機器の異常を正確
に診断することは不可能である。また、分解ガス量から
診断する場合においても、上述の場合と全く同様に、絶
縁物の吸脱着作用のために正確な診断ができない。Therefore, even if the amount of moisture in the insulating gas 4 measured by the moisture sensor 5 is the same, the amount of moisture adsorbed and desorbed by the insulator will differ depending on the temperature. Even if the measured value of the moisture content in the insulating gas 4 measured in step 5 is less than the li'l capacity water molecule fiWa (%), the actual moisture content in the insulator exceeds the allowable moisture content. can occur. Therefore, it is impossible to accurately diagnose abnormalities in gas insulated equipment by measuring the amount of water in the insulating gas 4. Further, even when making a diagnosis based on the amount of decomposed gas, an accurate diagnosis cannot be made due to the adsorption/desorption effect of the insulator, just as in the case described above.
本発明は上記事情に鑑みてなされたもので、従って、そ
の目的は、温度変化に伴う絶縁物の吸脱着作用をも考慮
に入れた信頼性の高い診断のできるガス絶縁機器の異常
診断装置を提供することにある。The present invention has been made in view of the above circumstances, and therefore, its purpose is to provide an abnormality diagnosis device for gas insulated equipment that can perform highly reliable diagnosis taking into account the adsorption and desorption effect of insulators due to temperature changes. It is about providing.
［発明の構成］
（課題を解決するための手段）
本発明のガス絶縁機器の異常診断装置はガス絶縁機器内
に封入された絶縁ガス中の水分量又は分解ガス量を測定
するセンサと、封入ガスの温度を測定する温度センサと
を備え、前記センサにより測定された水分量又は分解ガ
ス量及び前記温度センサにより測定された封入ガス温度
に基づいてガス絶縁機器の異常診断を行なうようにした
ものである。[Structure of the Invention] (Means for Solving the Problems) The abnormality diagnosis device for gas insulated equipment of the present invention includes a sensor that measures the amount of moisture or the amount of decomposed gas in an insulating gas sealed in the gas insulated equipment, and A temperature sensor that measures the temperature of the gas, and an abnormality diagnosis of the gas insulated equipment is performed based on the amount of moisture or decomposed gas measured by the sensor and the temperature of the sealed gas measured by the temperature sensor. It is.
（作用）
密閉されたタンク内に置かれた絶縁物が吸脱着する水分
量（又は分解ガス量）と、周囲の絶縁ガス中の水分量（
又は分解ガス量）は、前記絶縁物の温度に応じて一定の
平衡状態に達する。また、絶縁物の温度は、周囲の絶縁
ガス温度と相関関係があり、絶縁ガスの温度を測定する
ことによって絶縁物の温度を容易に推定することができ
る。従って、温度センサを用い、絶縁ガス温度を測定す
ることて、絶縁物の温度を推定し、史にその７１１１１
定温度における絶縁物が吸脱着する水分量（又は分解ガ
ス量）と絶縁ガス中の水分量（又は分解ガス量）との平
衡関係から、ガス絶縁機器内の総水分量（又は総分解ガ
ス量）を推定することができる。(Function) The amount of moisture (or amount of decomposed gas) adsorbed and desorbed by an insulator placed in a sealed tank and the amount of moisture in the surrounding insulating gas (
or the amount of decomposed gas) reaches a certain equilibrium state depending on the temperature of the insulator. Further, the temperature of the insulator has a correlation with the temperature of the surrounding insulating gas, and the temperature of the insulator can be easily estimated by measuring the temperature of the insulating gas. Therefore, by measuring the temperature of the insulating gas using a temperature sensor, the temperature of the insulator can be estimated.
From the equilibrium relationship between the amount of moisture (or amount of decomposed gas) adsorbed and desorbed by the insulator at a constant temperature and the amount of moisture (or amount of decomposed gas) in the insulating gas, the total amount of moisture (or total amount of decomposed gas) in gas-insulated equipment is determined. ) can be estimated.
従、って、温度センサを用いて測定した絶縁ガス温度を
、従来の水分量（又は分解ガス量）を診断するデータに
加えることで、絶縁物の吸脱むをも考慮した信頼性の高
い異常診断が可能になる。Therefore, by adding the insulating gas temperature measured using a temperature sensor to the conventional data for diagnosing the moisture content (or decomposed gas content), a highly reliable method that takes into account the absorption and desorption of the insulating material can be achieved. Abnormal diagnosis becomes possible.
（実施例）
以ド、本発明の一実施例についてガス絶縁変圧器を例に
とり、第１図及び第２図を参照して説明する。(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2, taking a gas insulated transformer as an example.
密閉されたタンク１１内には、巻線］２及び秩心１３か
らなる変圧器中身が収納されていると共に、例えばＳＦ
６よりなる絶縁ガス１４が封入されている。またタンク
１１には、絶縁ガス１４中の水分量をａｌｌｊ定する水
分センサ１５、及び絶縁ガス１４の上部、下部温度を測
定する２つの温度センサ１６．１７が取り付けられてい
る。更に、水分センサ１５．温度センサ１６，１７は、
表示部２０、マイクロコンピュータ（図示せず）等を６
するモニター１８に、ケーブル１つにより接続されてい
る。Inside the sealed tank 11, the contents of the transformer consisting of the winding] 2 and the Chichishin 13 are stored, as well as, for example, the SF
An insulating gas 14 consisting of 6 is sealed. Also attached to the tank 11 are a moisture sensor 15 that determines the amount of moisture in the insulating gas 14 and two temperature sensors 16 and 17 that measure the upper and lower temperatures of the insulating gas 14. Further, a moisture sensor 15. The temperature sensors 16 and 17 are
A display unit 20, a microcomputer (not shown), etc.
It is connected to a monitor 18 by one cable.
次に、モニター１８による異常診断方法について説明す
る。Next, an abnormality diagnosis method using the monitor 18 will be explained.
温度センサ１６及び１７により測定された、タンク１１
の上部、下部における絶縁ガス温度δ＋＋１定値θ３．
θ２はケーブル１９を通ってモニター１８に送られる。Tank 11, measured by temperature sensors 16 and 17
Insulating gas temperature δ++1 constant value θ3.
θ2 is sent to the monitor 18 through the cable 19.
そしてモニター１８に組み込まれたマイクロコンピュー
タにより次の様な演算が行われ、絶縁物温度θ。が（１
）式により求められる。Then, the microcomputer built into the monitor 18 performs the following calculation to determine the insulator temperature θ. is (1
) is obtained by the formula.
θ。−Ｋ・ （θ１ ＋θ２）／２ ・・・・・・（１
）ここてＩくは絶縁物の＋イ質、温度センザ１６及び］
７の位置等から求められる定数で、予め実験等により定
められる。一方、タンク１］の絶縁物温度と周囲の絶縁
ガス］４中の水分量との間には一定の関係かあり、タン
ク１］内の絶縁物の温度上昇により水分か放出され、そ
れにより周囲の絶縁ガス］４中の水分量か増加する比例
関係にある。θ. −K・(θ1 +θ2)/2 ・・・・・・(1
) Here, the insulation material + quality, temperature sensor 16 and]
This is a constant determined from the position of 7, etc., and is determined in advance through experiments. On the other hand, there is a certain relationship between the temperature of the insulator in tank 1 and the amount of moisture in the surrounding insulating gas. There is a proportional relationship in which the amount of water in the insulating gas increases.
第２図の実線２１は初期水分量ｘ１弘の絶縁物を用いた
場合で、しかも絶縁性能か屯営であるときの絶縁物温度
（θ）と絶縁ガス中の水分量（％）との関係を示すデー
タである。このような絶縁物温度（θ）と絶縁ガス中の
水分１ｕ （９０）との関係（実線２１）を予め実験に
より求めておき、このデータをもとにして許容範囲をも
たせたデータ（−点鎖線２２）を許容水分量としてモニ
ター１８に内蔵されたマイクロコンピュータのＲＯＭに
テーブル化して記１Ｅ、させておく。尚、管理値に許容
範囲をもたせたのは、負荷の変動に対する絶縁ガスの温
度変化か緩慢である点を考慮したものである。そして、
異常診断にあたっては、温度センサ１６．１７により絶
縁ガスの温度を測定してマイクロコンピュータにより絶
縁物温度θ。を算出し、その絶縁物温度θ。における絶
縁ガス１４ ｒｌ］の許容水分量を管理値として、前記
ＲＯＭに記憶されているデータ群から読み出して、その
管理値と、水分センサ１５により測定された水分量とを
マイクロコンピュータにより比較することにより、異常
診断を行う。例えば、温度センサ１６及び１７による測
定値から算出された絶縁物の温度を０１、水分センサに
よる水分量の測定値をＷｌとする。この場合、従来は、
絶縁物温度を考慮せずに許容水分量が一定値Ｗ。に定ま
っていたため、Ｗ、、＜Ｗ、であれば従来方法では異常
という診断になるが、本実施例によれば、第２図に示す
様に測定値（θ＋、Ｗ＋）が管理値（−点鎖線２２）内
にあるので、正常という診断が下される。これは、絶縁
ガス１４中の増加した水分量は、絶縁物が水分を放出し
た分であり全体の水分量は増加していないという判断に
基くものである。逆に、温度センサ１６及び１７による
８１１１定値から算出された絶縁物の温度θ２における
水分量の測定値Ｗ２かＷ。以下（Ｗ２≦Ｗｏ）であれば
、従来方法では正常と診断するが、本実施例では測定値
（θ２．Ｗ２）が管理値（−点鎖線２２）より上にある
ので異常と診断する。これは、絶縁ガス１４中の水分か
絶縁物により吸むされたため、見掛上水分量か少なくな
ったように見えるたけてあり、絶縁物中の成行水分を含
めた全体の水分量は増えているという判断に基つくもの
である。The solid line 21 in Figure 2 shows the relationship between the insulator temperature (θ) and the moisture content (%) in the insulating gas when an insulator with an initial moisture content x 1 h is used, and the insulation performance is low. This is data showing. The relationship between the insulator temperature (θ) and the moisture 1u (90) in the insulating gas (solid line 21) is determined in advance through experiments, and based on this data, data with an allowable range (-point The chain line 22) is made into a table in the ROM of the microcomputer built in the monitor 18 as the allowable moisture content, and is recorded in the table 1E. The reason why the control value has an allowable range is to take into consideration the fact that the temperature of the insulating gas changes slowly with respect to changes in the load. and,
For abnormality diagnosis, the temperature of the insulating gas is measured by temperature sensors 16 and 17, and the insulating material temperature θ is determined by the microcomputer. Calculate the insulator temperature θ. reading the allowable moisture content of the insulating gas 14 rl] as a control value from the data group stored in the ROM, and comparing the control value with the moisture content measured by the moisture sensor 15 using a microcomputer; Performs abnormality diagnosis. For example, it is assumed that the temperature of the insulator calculated from the measured values by the temperature sensors 16 and 17 is 01, and the measured value of the moisture content by the moisture sensor is Wl. In this case, conventionally,
The allowable moisture content is a constant value W without considering the insulation temperature. If W, , < W, the conventional method would diagnose an abnormality, but according to this embodiment, the measured values (θ+, W+) are lower than the control value (- Since it is within the dotted chain line 22), it is diagnosed as normal. This is based on the judgment that the increased amount of moisture in the insulating gas 14 is due to the release of moisture from the insulator, and that the overall amount of moisture has not increased. Conversely, the measured value W2 or W of the moisture content at the temperature θ2 of the insulator calculated from the 8111 constant values obtained by the temperature sensors 16 and 17. If W2≦Wo, it is diagnosed as normal in the conventional method, but in this embodiment, since the measured value (θ2.W2) is above the control value (-dotted chain line 22), it is diagnosed as abnormal. This is because the moisture in the insulating gas 14 was absorbed by the insulator, so the amount of moisture appears to have decreased, but the total amount of moisture, including the natural moisture in the insulator, has increased. It is based on the judgment that there is.
尚、測定値（θＸ、ＷＸ）が管理値（−点鎖線２２）よ
りドにあった場合は水分センサ１５の異常と診断する。Incidentally, if the measured values (θX, WX) are below the control value (-dotted chain line 22), it is diagnosed that the moisture sensor 15 is abnormal.
このように、ガス絶縁機器の異常診断装置に温度センサ
１６，１７を加えることで、従来とは異なり絶縁物によ
る水分の吸脱着をも考慮した龜頼性の高い診断が可能に
なる。In this way, by adding the temperature sensors 16 and 17 to the abnormality diagnosis device for gas insulated equipment, it becomes possible to perform highly reliable diagnosis that also takes into account moisture adsorption and desorption by the insulator, unlike the conventional method.
尚、本実施例においては、タンク１］内の」一部と下部
において、温度差が生じているためタンク１１の」二部
と下部に温度センサ１６，１７を２ノｒ設けて、平均的
な絶縁物温度を推定できるようにしたか、タンク１１内
の平均的な絶縁ガス温度になる位置に温度センサを１個
たけ設ける構成としても良い。勿論、タンク１１の大き
さや形状等に合わせて精度良く絶縁ガス温度か測定でき
る様に、温度センサを３個以上配置しても良い。また、
水分センサ１５による７１１１１定値を温度センサ１６
．１７の検知温度に応じて補正し、それを一定の基準値
と比較することによって異常を診断するようにしてもよ
い。In this embodiment, since there is a temperature difference between a part and a lower part of the tank 11, two temperature sensors 16 and 17 are installed in the second part and the lower part of the tank 11 to maintain the average temperature. Alternatively, one temperature sensor may be provided in the tank 11 at a position where the average insulating gas temperature can be estimated. Of course, three or more temperature sensors may be arranged in accordance with the size, shape, etc. of the tank 11 so that the temperature of the insulating gas can be measured with high accuracy. Also,
The constant value of 71111 from the moisture sensor 15 is measured by the temperature sensor 16.
．． An abnormality may be diagnosed by correcting the temperature in accordance with the detected temperature of 17 and comparing it with a certain reference value.
尚、上記実施例では、水分センサ１５を例に説明したが
、分解ガス量を検出するガスセンサを設けた場合も全く
同様にして診断が可能である。Although the above embodiment has been explained using the moisture sensor 15 as an example, diagnosis can be performed in exactly the same manner even when a gas sensor for detecting the amount of decomposed gas is provided.
［発明の効果］
以上の説明から明らかな様に本発明は、絶縁ガス中の水
分量又は分解ガス量を測定するセンサと絶縁ガス温度を
測定する温度センサを用いることにより、従来構成では
無視されていた、絶縁物が吸脱着する水分量（又は分解
ガス量）をも考慮した信頼性の高いガス絶縁機器の異常
診断が可能となる。[Effects of the Invention] As is clear from the above description, the present invention uses a sensor that measures the amount of moisture in the insulating gas or the amount of decomposed gas, and a temperature sensor that measures the temperature of the insulating gas. It becomes possible to perform highly reliable abnormality diagnosis of gas-insulated equipment, taking into consideration the amount of moisture (or amount of decomposed gas) adsorbed and desorbed by the insulator.
第１図及び第２図は本発明の一実施例を示すもので、第
１図はガス絶縁機器を含む異常診断装置の概略的構成図
、第２図は絶縁物温度と周囲の絶縁ガス中の許容水分量
との関係を表わす甲衡ＱｊＡ図である。そして、第３図
は従来例をボす第１図相当図である。
図面中、］１はタンク、コ２は巻線、１′Ｂは鉄心、］
４は絶縁ガス、］５は水分センサ、］６及び１７は温度
センサ、１８はモニターを示す。
代理人 弁理士 則 近 憲 佑
−］］−
ｆ噌ト区、ｆ＋ｃ−ｘや訓ｇ
第 ３ 図Figures 1 and 2 show an embodiment of the present invention. Figure 1 is a schematic diagram of an abnormality diagnosis device including gas insulated equipment, and Figure 2 shows the temperature of the insulator and the temperature of the surrounding insulating gas. FIG. FIG. 3 is a diagram corresponding to FIG. 1, which shows the conventional example. In the drawing,] 1 is the tank, 2 is the winding, 1'B is the iron core,]
4 is an insulating gas, 5 is a moisture sensor, 6 and 17 are temperature sensors, and 18 is a monitor. Agent Patent Attorney Noriyuki Chika - ] - f + c - x and g Fig. 3
Claims (1)
は分解ガス量を測定するセンサと、封入ガスの温度を測
定する温度センサとを備え、前記センサにより測定され
た水分量又は分解ガス量及び前記温度センサにより測定
された封入ガス温度に基づいて前記ガス絶縁機器の異常
診断を行うことを特徴とするガス絶縁機器の異常診断装
置。1. A gas insulated device includes a sensor that measures the amount of moisture or amount of decomposed gas in the insulating gas sealed in the gas insulating equipment, and a temperature sensor that measures the temperature of the sealed gas, and the amount of water or decomposed gas measured by the sensor and the amount of decomposed gas measured by the sensor. An abnormality diagnosis device for gas insulated equipment, characterized in that an abnormality diagnosis of the gas insulated equipment is performed based on the temperature of the sealed gas measured by the temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2303885A JPH04177710A (en) | 1990-11-13 | 1990-11-13 | Abnormality diagnosis device of gas insulation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2303885A JPH04177710A (en) | 1990-11-13 | 1990-11-13 | Abnormality diagnosis device of gas insulation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04177710A true JPH04177710A (en) | 1992-06-24 |
Family
ID=17926444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2303885A Pending JPH04177710A (en) | 1990-11-13 | 1990-11-13 | Abnormality diagnosis device of gas insulation equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04177710A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH077114U (en) * | 1993-06-28 | 1995-01-31 | 日新電機株式会社 | Oil temperature monitoring device for oil-filled electrical equipment |
| JP2002543605A (en) * | 1999-04-30 | 2002-12-17 | ゼネラル・エレクトリック・カンパニイ | Apparatus and method for detecting state of fluid-filled electrical equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61174707A (en) * | 1985-01-30 | 1986-08-06 | Toshiba Corp | Gas insulation transformer |
| JPH02161703A (en) * | 1988-12-15 | 1990-06-21 | Toshiba Corp | Abnormal state detecting method for gas-filled electric device |
-
1990
- 1990-11-13 JP JP2303885A patent/JPH04177710A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61174707A (en) * | 1985-01-30 | 1986-08-06 | Toshiba Corp | Gas insulation transformer |
| JPH02161703A (en) * | 1988-12-15 | 1990-06-21 | Toshiba Corp | Abnormal state detecting method for gas-filled electric device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH077114U (en) * | 1993-06-28 | 1995-01-31 | 日新電機株式会社 | Oil temperature monitoring device for oil-filled electrical equipment |
| JP2002543605A (en) * | 1999-04-30 | 2002-12-17 | ゼネラル・エレクトリック・カンパニイ | Apparatus and method for detecting state of fluid-filled electrical equipment |
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