JPH0339261B2 - - Google Patents
Info
- Publication number
- JPH0339261B2 JPH0339261B2 JP57177880A JP17788082A JPH0339261B2 JP H0339261 B2 JPH0339261 B2 JP H0339261B2 JP 57177880 A JP57177880 A JP 57177880A JP 17788082 A JP17788082 A JP 17788082A JP H0339261 B2 JPH0339261 B2 JP H0339261B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- insulating oil
- circulation pipe
- container
- sample
- 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 - Lifetime
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2805—Oils, i.e. hydrocarbon liquids investigating the resistance to heat or oxidation
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
【発明の詳細な説明】
この発明は、絶縁油の劣化試験装置に関するも
のであり、とりわけ、変圧器などの絶縁油の劣化
初期の安定性を調べるための絶縁油の劣化試験装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an insulating oil deterioration test device, and more particularly to an insulating oil deterioration test device for examining the stability of insulating oil in transformers, etc. in the initial stage of deterioration. .
従来、絶縁油の劣化（安定度）試験は、JIS
C2101，ASTM D1313，IEC Pub74などに規定
されているが、JISの試験法の場合は、第１図に
示すような試験装置で行われる。図において、試
料の絶縁油１が銅触媒２を備えた試料容器３に収
容されて恒温油浴４に浸漬され、試料容器３には
ガス吸入口５から酸素が供給される。６はガス調
節器、７はシール用の油、８は酸素の供給量をみ
るためのマノメーター、９は酸素を乾燥するため
の乾燥剤である。かような装置により、まず、25
mlの絶縁油１に100cm2／油100mlの電気用硬銅線の
銅触媒２を投入し酸素を連続的に試料容器３内の
油面上に供給する。加熱劣化は120℃の温度で75
時間行なう。その劣化絶縁油の酸化安定度は全酸
価とスラツジの量で評価する。試験条件が若干異
るが他のASTM D1313，IEC Pub75等の試験法
も同じような方法で酸化安定度を調べる。ところ
が最近の変圧器を例にとると、30年運転してもス
ラツジが出るほど劣化しないため、以上のような
従来の酸化安定度試験では実状にそぐわないとい
う欠点があつた。 Conventionally, the deterioration (stability) test of insulating oil was conducted using JIS
Although it is stipulated in C2101, ASTM D1313, IEC Pub74, etc., the JIS test method is performed using a testing device as shown in Figure 1. In the figure, a sample of insulating oil 1 is contained in a sample container 3 equipped with a copper catalyst 2 and immersed in a constant temperature oil bath 4, and oxygen is supplied to the sample container 3 from a gas inlet 5. 6 is a gas regulator, 7 is oil for sealing, 8 is a manometer for checking the amount of oxygen supplied, and 9 is a desiccant for drying the oxygen. With such a device, first, 25
ml of insulating oil 1 and 100 cm 2 /oil of 100 ml of copper catalyst 2 made of electrical hard copper wire are introduced, and oxygen is continuously supplied onto the oil surface in sample container 3. Heat deterioration is 75 at a temperature of 120℃
Do time. The oxidation stability of the deteriorated insulating oil is evaluated by the total acid value and the amount of sludge. Although the test conditions are slightly different, other test methods such as ASTM D1313 and IEC Pub75 examine oxidation stability using a similar method. However, taking modern transformers as an example, they do not deteriorate to the point where sludge is produced even after 30 years of operation, so the conventional oxidation stability test described above has the disadvantage that it does not suit the actual situation.
また、特開昭55−10578号公報には、循環管路
を設けて絶縁油を循環させ、その途中に電極を設
けて電気抵抗および誘電正接を経時的に測定する
装置が開示されているが、酸素は、絶縁油を通過
後、大気へ放出する構成であるため、劣化発生ガ
スの分析ができないという欠点があつた。 Furthermore, Japanese Patent Application Laid-open No. 10578/1983 discloses an apparatus in which a circulation pipe is provided to circulate insulating oil, and an electrode is provided in the middle of the pipe to measure electrical resistance and dielectric loss tangent over time. However, since the oxygen is released into the atmosphere after passing through the insulating oil, it has the disadvantage that it is not possible to analyze the gases generated due to deterioration.
この発明は上記欠点にかんがみてなされたもの
で、酸化劣化過程における絶縁油の電気抵抗およ
び誘電正接が測定できると共に酸素量あるいは劣
化発生ガスの分析ができる絶縁油の劣化試験装置
を提供することを目的とするものである。 The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide an insulating oil deterioration test device that can measure the electrical resistance and dielectric loss tangent of insulating oil during the oxidative deterioration process, and can also analyze the amount of oxygen or deterioration gas. This is the purpose.
かかる目的を有するこの発明は、ヒーターが設
けられて絶縁油を収納する密閉容器とガス収納容
器間で、酸素あるいは混合ガスを循環させるガス
循環管路を設け、このガス循環管路にガス採取口
を備えるとともに、絶縁油を密閉容器内で循環さ
せる管路に絶縁油の電気特性を測定するための電
極を備えた構成になるものである。 The present invention having such an object provides a gas circulation pipe for circulating oxygen or a mixed gas between a sealed container provided with a heater and containing insulating oil and a gas storage container, and a gas sampling port is provided in the gas circulation pipe. In addition, the pipe for circulating the insulating oil in a closed container is equipped with an electrode for measuring the electrical characteristics of the insulating oil.
以下、この発明における絶縁油の劣化試験装置
Ａの一実施例を第２図に基いて説明する。 An embodiment of the insulating oil deterioration test apparatus A according to the present invention will be described below with reference to FIG. 2.
図において、ガラス容器１１が収納されている
金属容器１２には上部が蓋１３で閉止され、密閉
容器を構成している。ガラス容器１１には試料の
絶縁油１４を収納するとともに、この絶縁油１４
を加熱するためのヒーター１５を容器１２を囲ん
で設ける。ガラス容器１１内には電気用硬銅線で
なる銅触媒１６を穴あきガラス板１７上に支持収
納し、また、絶縁油１４の温度を測定するための
温度計１８を配置する。液体ポンプ１９は循環管
路２０に絶縁油１４を循環させる。２１は絶縁油
１４の循環管路２０に設けられた同軸円筒状電極
であり、第３図に示すように高圧電極２１ａと低
圧電極２１ｂとの間に絶縁油１４が流動できるよ
うになつている。なお２１ｃはガード電極、２１
ｄは３点支持体のビスである。２２はプラスチツ
クの袋でなり酸素ガスあるいは酸素・窒素の混合
ガスなどのガスを収納するテドラーバツグで、絶
縁油１４の劣化が進むと酸素ガス等が減少する
が、そのようなガス量の減少に応動できるもので
ある。このテドラーバツグ２２には酸素ガス等を
絶縁油１４中に気体ポンプ２３で送りこむガス循
環管路２４が接続されている。気体ポンプ２３
は、例えば市販のローラポンプのようなポンプが
利用できる。ガス循環管路２４中にはガス採取口
２５が設けられ、酸素あるいは劣化発生ガス等を
採取できるようになつている。このガス採取口２
５からはマイクロシリンダ等を用いてガスを採取
し、採取したガスはそのままガスクロマトグラフ
でガス分析にかけられる。 In the figure, a metal container 12 in which a glass container 11 is housed is closed at the top with a lid 13, forming a closed container. Insulating oil 14 as a sample is stored in the glass container 11, and this insulating oil 14 is
A heater 15 for heating the container 12 is provided surrounding the container 12. Inside the glass container 11, a copper catalyst 16 made of electrical hard copper wire is supported and housed on a perforated glass plate 17, and a thermometer 18 for measuring the temperature of the insulating oil 14 is arranged. The liquid pump 19 circulates the insulating oil 14 through the circulation pipe 20. 21 is a coaxial cylindrical electrode provided in a circulation pipe 20 for the insulating oil 14, and as shown in FIG. 3, the insulating oil 14 can flow between the high voltage electrode 21a and the low voltage electrode 21b. . Note that 21c is a guard electrode, 21
d is a three-point support screw. Reference numeral 22 is a Tedlar bag made of plastic that stores gas such as oxygen gas or a mixed gas of oxygen and nitrogen.As the insulating oil 14 deteriorates, oxygen gas, etc. decreases. It is possible. A gas circulation line 24 is connected to the Tedler bag 22, through which oxygen gas or the like is fed into the insulating oil 14 by a gas pump 23. gas pump 23
For example, a pump such as a commercially available roller pump can be used. A gas sampling port 25 is provided in the gas circulation pipe 24 so that oxygen, deterioration gas, etc. can be sampled. This gas sampling port 2
Gas is sampled from 5 using a micro cylinder or the like, and the sampled gas is directly subjected to gas analysis using a gas chromatograph.
次に、上記のように構成された絶縁油の劣化試
験装置Ａの作用効果について説明する。 Next, the effects of the insulating oil deterioration test apparatus A configured as described above will be explained.
まず、試料の絶縁油１４を一定量密閉容器内に
充填し、液体ポンプ１９を作動させて絶縁油１４
を循環管路２０内に循環させる。そしてガス循環
管路２４を一時的に切り離し、そこから窒素ガス
を密閉容器内に送り込みながらヒーター１５で絶
縁油１４を所定の温度で所定の時間加熱する。そ
の後窒素ガスと一定量の酸素ガスとの混合ガスを
充填したテドラーバツグ２２に切換える。次にガ
ス循環管路２４および密閉容器内の絶縁油１４上
を所定の一定酸素量の雰囲気にし、気体ポンプ２
３で酸素ガスを循環させる。この状態で電極２１
に電圧を印加したまま電導電流を記録させれば、
絶縁油１４の劣化過程を連続的に追跡することが
できる。 First, a certain amount of sample insulating oil 14 is filled into a sealed container, and the liquid pump 19 is operated to
is circulated in the circulation pipe 20. Then, the gas circulation pipe 24 is temporarily disconnected, and the insulating oil 14 is heated by the heater 15 at a predetermined temperature for a predetermined time while nitrogen gas is fed into the sealed container. Thereafter, it is switched to a Tedlar bag 22 filled with a mixed gas of nitrogen gas and a certain amount of oxygen gas. Next, the gas circulation pipe 24 and the insulating oil 14 in the sealed container are made into an atmosphere with a predetermined constant amount of oxygen, and the gas pump 2
3. Circulate oxygen gas. In this state, the electrode 21
If we record the conduction current while applying a voltage to
The deterioration process of the insulating oil 14 can be continuously tracked.
誘電正接tanδは次の式によつて電導電流ｉから
求められる。 The dielectric loss tangent tan δ is determined from the conduction current i using the following equation.
tanδ＝１／ω・ε・ε0・ｉ／KV
ここで、ωは角周波数、εは比誘電率、ε0は
8.85×10-14F／cm、Ｋは電極定数、Ｖは印加電圧
である。 tanδ=1/ω・ε・ε 0・i/KV Here, ω is the angular frequency, ε is the dielectric constant, and ε 0 is
8.85×10 −14 F/cm, K is the electrode constant, and V is the applied voltage.
このほか、電導電流を測定する代りにシエーリ
ングブリツジによつて誘電正接を精度良く測定す
ることができる。 In addition, the dielectric loss tangent can be measured with high accuracy by using a Schering bridge instead of measuring the conduction current.
絶縁油１４の劣化過程で起こる酸素ガスの消費
あるいは劣化過程での発生ガスは、第４図のよう
にガス採取口２５とガスクロマトグラフ２６とを
直結して連続的にガス分析を行うとなおよい。 The consumption of oxygen gas that occurs during the deterioration process of the insulating oil 14 or the gas generated during the deterioration process is best examined by continuously connecting the gas sampling port 25 and the gas chromatograph 26 as shown in FIG. .
また、第５図、第６図にそれぞれ示すようにテ
ドラーバツグ２２に代えて、同様の機能を持つピ
ストン容器２２ａあるいはベロー２２ｂが使え
る。 Furthermore, as shown in FIGS. 5 and 6, in place of the Tedlar bag 22, a piston container 22a or a bellows 22b having similar functions can be used.
以上説明したように、この発明によれば、絶縁
油を循環させ、この絶縁油中に電極を設けること
により精度よく電導電流および誘電正接が経時的
に測定できると共に、ガス循環管路とガス収納容
器で一定量の酸素ガスを絶縁油中に循環させるこ
とにより、変圧器内の劣化に近い状態での劣化試
験、特にガス分析ができ、その効果は大である。 As explained above, according to the present invention, by circulating insulating oil and providing electrodes in this insulating oil, conduction current and dielectric loss tangent can be accurately measured over time, and gas circulation pipes and gas storage By circulating a certain amount of oxygen gas through the insulating oil in a container, it is possible to perform deterioration tests, especially gas analysis, under conditions close to the deterioration inside the transformer, which is highly effective.
第１図は従来の装置の概略構成図、第２図はこ
の発明の一実施例の概略構成図、第３図は同じく
同軸円筒電極の縦断面図、第４図は同じく他の実
施例の概略構成図、第５図は同じくさらに他の実
施例の概略構成図、第６図は同じくさらに別の実
施例の概略構成図である。
１１……ガラス容器、１２……金属容器（密閉
容器）、１３……蓋、１４……試料の絶縁油、１
５……ヒーター、１６……銅触媒、１７……穴あ
きガラス板、１８……温度計、１９……液体ポン
プ、２０……循環管路、２１……同軸円筒電極、
２１ａ……高圧電極、２１ｂ……低圧電極、２２
……テドラーバツグ（ガス収納容器）、２２ａ…
…ピストン容器、２２ｂ……ベロー、２３……気
体ポンプ、２４……ガス循環管路、２５……ガス
採取口、２６……ガスクロマトグラフ。なお、各
図中、同一符号は同一又は相当部分を示す。
Fig. 1 is a schematic diagram of a conventional device, Fig. 2 is a schematic diagram of an embodiment of the present invention, Fig. 3 is a vertical cross-sectional view of a coaxial cylindrical electrode, and Fig. 4 is a diagram of another embodiment. FIG. 5 is a schematic diagram of another embodiment, and FIG. 6 is a schematic diagram of another embodiment. 11...Glass container, 12...Metal container (airtight container), 13...Lid, 14...Sample insulating oil, 1
5... Heater, 16... Copper catalyst, 17... Perforated glass plate, 18... Thermometer, 19... Liquid pump, 20... Circulation pipe, 21... Coaxial cylindrical electrode,
21a...High voltage electrode, 21b...Low voltage electrode, 22
...Tedler bag (gas storage container), 22a...
... Piston container, 22b ... Bellows, 23 ... Gas pump, 24 ... Gas circulation pipe, 25 ... Gas sampling port, 26 ... Gas chromatograph. In each figure, the same reference numerals indicate the same or equivalent parts.
Claims (1)
する密閉容器と、前記試料絶縁油を前記密閉容器
内に循環させる循環管路と、前記試料絶縁油中の
前記循環管路に配設されて前記試料絶縁油の電気
特性を測定するための電極と、前記試料絶縁油に
所定のガスを供給するガス供給手段とを備えた絶
縁油の劣化試験装置において、 前記ガス供給手段が、前記密閉容器内に所定の
ガスを循環させるガス循環管路と、このガス循環
路が接続された一定容積のガス収納容器と、前記
ガス循環管路に設けられたガス採取口とからなる
ことを特徴とする絶縁油の劣化試験装置。[Scope of Claims] 1. A closed container provided with a heating heater and containing a sample insulating oil, a circulation pipe for circulating the sample insulating oil in the closed container, and a circulation pipe in the sample insulating oil. An insulating oil deterioration testing apparatus comprising: an electrode disposed in a holder for measuring electrical characteristics of the sample insulating oil; and a gas supply means for supplying a predetermined gas to the sample insulating oil, the gas supply means is composed of a gas circulation pipe for circulating a predetermined gas in the sealed container, a gas storage container with a fixed volume to which this gas circulation pipe is connected, and a gas sampling port provided in the gas circulation pipe. An insulating oil deterioration test device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17788082A JPS5967451A (en) | 1982-10-08 | 1982-10-08 | Deterioration tester for insulating oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17788082A JPS5967451A (en) | 1982-10-08 | 1982-10-08 | Deterioration tester for insulating oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5967451A JPS5967451A (en) | 1984-04-17 |
| JPH0339261B2 true JPH0339261B2 (en) | 1991-06-13 |
Family
ID=16038666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17788082A Granted JPS5967451A (en) | 1982-10-08 | 1982-10-08 | Deterioration tester for insulating oil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5967451A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9488612B2 (en) * | 2014-06-04 | 2016-11-08 | Infineum International Limited | Lubricant test method |
| CN106248912B (en) * | 2016-07-21 | 2018-04-03 | 广东电网有限责任公司电力科学研究院 | A kind of characterizing method of transformer oil ageing |
| JP7599168B2 (en) * | 2020-07-02 | 2024-12-13 | 株式会社明電舎 | Insulating oil deterioration diagnosis device and insulating oil deterioration diagnosis method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6030890B2 (en) * | 1978-07-10 | 1985-07-19 | 三菱電機株式会社 | Insulating oil stability test equipment |
-
1982
- 1982-10-08 JP JP17788082A patent/JPS5967451A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5967451A (en) | 1984-04-17 |
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