JPH11162256A - Insulating oil and ac oil-filled cable using it for arctic frigid zone - Google Patents
Insulating oil and ac oil-filled cable using it for arctic frigid zoneInfo
- Publication number
- JPH11162256A JPH11162256A JP32676597A JP32676597A JPH11162256A JP H11162256 A JPH11162256 A JP H11162256A JP 32676597 A JP32676597 A JP 32676597A JP 32676597 A JP32676597 A JP 32676597A JP H11162256 A JPH11162256 A JP H11162256A
- Authority
- JP
- Japan
- Prior art keywords
- insulating oil
- oil
- alkyldiphenylethane
- alkyldiphenylmethane
- insulating
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、気温が−４０℃
から−８０℃にも達する極寒冷地に敷設される極寒冷地
用交流ＯＦケーブルおよびこれに用いられる絶縁油に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to an AC OF cable for an extremely cold region laid in an extremely cold region reaching a temperature of from −80 ° C. to −80 ° C. and an insulating oil used for the cable.
【０００２】[0002]
【従来の技術】ＯＦケーブルは、周知のように、導体上
にクラフト紙、ポリプロピレンフィルムラミネート紙な
どの絶縁紙を巻回し、これに鉱油系、アルキルベンゼン
系合成油などの絶縁油を含浸して油浸絶縁体を形成し、
金属シースを被覆してなるもので、ケーブル内の絶縁油
に常時圧力を印加して供用され、超高圧大容量用電力ケ
ーブルとして、交流用のみならず直流送電用としても広
く使用されている。2. Description of the Related Art As is well known, an OF cable is made by winding an insulating paper such as a kraft paper or a polypropylene film laminated paper on a conductor and impregnating the insulating paper with an insulating oil such as a mineral oil type or an alkylbenzene type synthetic oil. Forming an immersion insulator,
It is coated with a metal sheath and is used by constantly applying pressure to the insulating oil in the cable, and is widely used as an ultrahigh-voltage large-capacity power cable not only for AC but also for DC power transmission.
【０００３】ところで、このＯＦケーブルを例えば−４
０℃ないし−８０℃にも達する極寒冷地、北極圏地方、
南極などに敷設し、供用しようとすると、油浸絶縁体に
含浸されている絶縁油の粘度が著しく上昇し、流動性を
失い、油圧を印加しずらくなる。例えば、アルキルベン
ゼン系合成油では、２０℃の動粘度が４．５ｃＳｔ（セ
ンチストークス）であるものが、−４０℃では１８０ｃ
Ｓｔと約４０倍にも上昇する。したがって、このような
極寒冷地において使用されるＯＦケーブルでは、その絶
縁油として−８０℃においても十分低粘度であるものが
必要となってくる。[0003] By the way, this OF cable is, for example, -4
Frigid regions, the Arctic region, reaching 0 ° C to -80 ° C,
If it is laid and used in the South Pole or the like, the viscosity of the insulating oil impregnated in the oil-immersed insulator significantly increases, the fluidity is lost, and it becomes difficult to apply the hydraulic pressure. For example, an alkylbenzene synthetic oil having a kinematic viscosity at 20 ° C. of 4.5 cSt (centistokes) is 180 c at −40 ° C.
It is about 40 times higher than St. Therefore, for an OF cable used in such extremely cold regions, it is necessary to use an insulating oil having a sufficiently low viscosity even at -80 ° C.
【０００４】[0004]
【発明が解決しようとする課題】よって、本発明におけ
る課題は、−８０℃にまで達する極寒冷地において敷
設、使用されるＯＦケーブルにおいて、その絶縁油の粘
度が上昇して、油圧が十分に印加できなくなることを防
止することにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an OF cable laid and used in an extremely cold region up to -80 ° C., in which the viscosity of the insulating oil increases and the hydraulic pressure is sufficiently increased. An object of the present invention is to prevent the application from being impossible.
【０００５】[0005]
【課題を解決するための手段】かかる課題は、絶縁油と
して、アルキルジフェニルメタンとアルキルジフェニル
エタンとの混合物を主体とし、−４０℃での動粘度が８
０ｃＳｔ以下であるものを用いることにより解決され
る。An object of the present invention is to provide an insulating oil mainly composed of a mixture of alkyldiphenylmethane and alkyldiphenylethane and having a kinematic viscosity at -40.degree.
The problem is solved by using the one that is 0 cSt or less.
【０００６】[0006]
【発明の実施の形態】以下、本発明を詳しく説明する。
本発明の絶縁油は、アルキルジフェニルメタンとアルキ
ルジフェニルエタンとの混合物を主体とし、−４０℃に
おける動粘度が８０ｃＳｔ以下の合成絶縁油である。こ
の絶縁油の一方の主成分であるアルキルジフェニルメタ
ンは、次の一般式（Ｉ）で示されるものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The insulating oil of the present invention is a synthetic insulating oil mainly composed of a mixture of alkyldiphenylmethane and alkyldiphenylethane and having a kinematic viscosity at −40 ° C. of 80 cSt or less. Alkyl diphenylmethane, one of the main components of this insulating oil, is represented by the following general formula (I).
【０００７】[0007]
【化１】 Embedded image
【０００８】式（Ｉ）中、Ｒ1 およびＲ2 はともに炭素
数１〜５のアルキル基である。このアルキルジフェニル
メタンの分子量は上記炭素数に応じて定まる。また、他
方の主成分であるアルキルジフェニルメタンは、次の一
般式（ＩＩ）で示されるものである。In the formula (I), R 1 and R 2 are both alkyl groups having 1 to 5 carbon atoms. The molecular weight of this alkyldiphenylmethane is determined according to the above carbon number. The other main component, alkyldiphenylmethane, is represented by the following general formula (II).
【０００９】[0009]
【化２】 Embedded image
【００１０】式（ＩＩ）中、Ｒ3 およびＲ4 はともに炭
素数１〜５のアルキル基である。このアルキルジフェニ
ルエタンの分子量は上記炭素数に応じて定まる。そし
て、このアルキルジフェニルメタンとアルキルジフェニ
ルエタンとの混合物が絶縁油のすべてもしくは大部分を
占めるものとなる。アルキルジフェニルメタンとアルキ
ルジフェニルエタンとの混合割合は、重量比で、アルキ
ルジフェニルメタンが１０〜９０％、アルキルジフェニ
ルエタンが９０〜１０％の範囲とされる。In the formula (II), R 3 and R 4 are both alkyl groups having 1 to 5 carbon atoms. The molecular weight of this alkyldiphenylethane is determined according to the above carbon number. The mixture of alkyldiphenylmethane and alkyldiphenylethane occupies all or most of the insulating oil. The mixing ratio of alkyldiphenylmethane to alkyldiphenylethane is in the range of 10 to 90% by weight for alkyldiphenylmethane and 90 to 10% by weight.
【００１１】本発明の絶縁油にあっては、上記アルキル
ジフェニルメタンとアルキルジフェニルエタンとの混合
物以外の第３成分として、アルキルベンゼン系合成油な
どの油を配合することができるが、低温での粘度上昇の
点からその配合量は全量の５重量％以下とすべきであ
る。また、この二成分の混合物を主体とする絶縁油は、
−４０℃での動粘度が８０ｃＳｔ以下、好ましくは４０
ｃＳｔ以下であることが必要である。−４０℃での動粘
度が８０ｃＳｔを越えると、−４０℃以下の低温にＯＦ
ケーブルが曝された際にその動粘度が１００ｃＳｔを越
え、必要な油圧を印加することが困難となる。アルキル
ジフェニルメタンとアルキルジフェニルエタンとの混合
物からなる絶縁油の特性を、表１に従来のアルキルベン
ゼン系合成油と対比して示す。In the insulating oil of the present invention, an oil such as an alkylbenzene-based synthetic oil can be blended as the third component other than the mixture of the above-mentioned alkyldiphenylmethane and alkyldiphenylethane, but the viscosity increase at a low temperature can be achieved. In view of this, the amount should be 5% by weight or less of the total amount. The insulating oil mainly composed of the mixture of the two components is
Kinematic viscosity at -40 ° C is 80 cSt or less, preferably 40 cSt.
It must be less than or equal to cSt. If the kinematic viscosity at −40 ° C. exceeds 80 cSt, the OF becomes low at −40 ° C. or lower.
When the cable is exposed, its kinematic viscosity exceeds 100 cSt, making it difficult to apply necessary oil pressure. Table 1 shows the properties of the insulating oil composed of a mixture of alkyldiphenylmethane and alkyldiphenylethane in comparison with a conventional alkylbenzene-based synthetic oil.
【００１２】[0012]
【表１】 [Table 1]
【００１３】表１に示すように、この絶縁油は、−４０
℃での動粘度が５０ｃＳｔと８０ｃＳｔ以下であり、常
温での動粘度が従来のアルキルベンゼン系合成油に比べ
て約４０％も低く、ＯＦケーブルの製造時の絶縁油の含
浸作業も容易である。また、電気絶縁性は従来のアルキ
ルベンゼン系合成油とほぼ同等で十分な値を有してい
る。さらに、比重が１に近く、海水の比重に接近してい
るので、海底ケーブルとしたときの補償油圧が小さくて
済み、外装の設計が容易となる。また、この絶縁油は、
表１に示すようにその体膨張係数が従来のアルキルベン
ゼン系合成油に比べて小さいので、温度変化に伴う体積
の変動量が小さくなり、これによってＯＦケーブルに油
圧を印加するための給油設備の種々の機器、例えば圧力
容器などの強度を下げることができ、設備の簡素化が可
能である。このような絶縁油の具体例としては、「ＳＡ
Ｓ４０」（商品名、日本石油（株）製造）などがある。As shown in Table 1, this insulating oil is -40
The kinematic viscosity at 50 ° C. is 50 cSt and 80 cSt or less, the kinematic viscosity at room temperature is about 40% lower than that of the conventional alkylbenzene synthetic oil, and the operation of impregnating the insulating oil at the time of manufacturing an OF cable is easy. Further, the electrical insulation properties are almost equivalent to those of the conventional alkylbenzene-based synthetic oil and have a sufficient value. Further, since the specific gravity is close to 1 and close to the specific gravity of seawater, the compensation hydraulic pressure when forming a submarine cable is small, and the design of the exterior is easy. Also, this insulating oil
As shown in Table 1, its volume expansion coefficient is smaller than that of the conventional alkylbenzene-based synthetic oil, so that the amount of change in volume due to a temperature change is small, whereby various oil supply facilities for applying oil pressure to the OF cable are provided. , Such as a pressure vessel, can be reduced in strength, and the equipment can be simplified. Specific examples of such insulating oil include “SA
S40 "(trade name, manufactured by Nippon Oil Co., Ltd.).
【００１４】本発明の極寒冷地用交流ＯＦケーブルは、
上述の絶縁油を使用したものである。すなわち、導体直
上もしくは遮蔽層や半導電層上にクラフト紙、ポリプロ
ピレンフィルムラミネート紙等の絶縁紙を多層に巻回
し、これに上述の絶縁油を含浸してなる油浸絶縁体を有
するものである。絶縁油の含浸は、巻回後の絶縁紙を真
空乾燥したのち、５０〜８０℃に加熱した絶縁油を加
圧、含浸する方法などがとられるが、常温での粘度が従
来のアルキルベンゼン系合成油よりも低いので、含浸が
良好で短時間に行うことができる。The AC OF cable for extremely cold regions of the present invention is
The above-mentioned insulating oil is used. That is, a kraft paper, an insulating paper such as a polypropylene film laminated paper or the like is wound in multiple layers directly on a conductor or on a shielding layer or a semiconductive layer, and has an oil-immersed insulator obtained by impregnating the above-mentioned insulating oil. . Insulation with insulating oil is performed by vacuum-drying the wound insulating paper, and then pressing and impregnating the insulating oil heated to 50 to 80 ° C. Since it is lower than oil, the impregnation is good and can be performed in a short time.
【００１５】このようなＯＦケーブルにあっては、これ
に含浸されている絶縁油が−４０℃以下の低温となって
も十分な流動性を保つため、周囲温度が−８０℃程度に
までなる極寒冷地において使用されても、絶縁油が流動
状態にあり、必要な油圧を印加することができ、過渡油
圧が不足することがなく、極低温下においても高い絶縁
特性を発揮する。また、上記絶縁油での常温域での動粘
度が低いので、ＯＦケーブルの製造時においての絶縁油
の含浸作業を容易に、短時間で行うことができる。さら
に、このＯＦケーブルは上述の絶縁油の誘電特性が良好
であるため、特に交流送電用として好適である。In such an OF cable, the ambient temperature is reduced to about -80 ° C in order to maintain sufficient fluidity even if the insulating oil impregnated therein has a low temperature of -40 ° C or less. Even when used in an extremely cold region, the insulating oil is in a fluid state, can apply a required oil pressure, does not have a shortage of transient oil pressure, and exhibits high insulation characteristics even at an extremely low temperature. In addition, since the kinematic viscosity of the insulating oil in a normal temperature range is low, the operation of impregnating the insulating oil at the time of manufacturing an OF cable can be performed easily and in a short time. Further, since the OF cable has good dielectric properties of the above-mentioned insulating oil, it is particularly suitable for AC power transmission.
【００１６】[0016]
【発明の効果】以上説明したように、本発明の絶縁油お
よび極寒冷地用交流ＯＦケーブルによれば、−４０℃な
いし−８０℃にも達する極寒冷地に敷設しても、絶縁油
は良好な流動性を保持しているため、必要な油圧を十分
に印加することができ、良好な絶縁特性を示すものとな
る。As described above, according to the insulating oil of the present invention and the AC OF cable for extremely cold regions, even if the insulating oil is laid in a very cold region reaching −40 ° C. to −80 ° C., the insulating oil can be used. Since good fluidity is maintained, necessary hydraulic pressure can be sufficiently applied, and good insulating properties are exhibited.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高橋 享 東京都江東区木場１丁目５番１号 株式会 社フジクラ内 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor: Takashi Takahashi 1-5-1, Kiba, Koto-ku, Tokyo Inside Fujikura Co., Ltd.
Claims (2)
量％とアルキルジフェニルエタン９０〜１０重量％との
混合物からなり、その動粘度が−４０℃において８０ｃ
Ｓｔ以下である絶縁油。1. A mixture of 10 to 90% by weight of an alkyldiphenylmethane and 90 to 10% by weight of an alkyldiphenylethane having a kinematic viscosity of 80 c at -40.degree.
Insulating oil not more than St.
交流で併用される極寒冷地用交流ＯＦケーブル。2. Impregnated with the insulating oil according to claim 1,
An AC OF cable for extremely cold regions that is used together with AC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32676597A JPH11162256A (en) | 1997-11-27 | 1997-11-27 | Insulating oil and ac oil-filled cable using it for arctic frigid zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32676597A JPH11162256A (en) | 1997-11-27 | 1997-11-27 | Insulating oil and ac oil-filled cable using it for arctic frigid zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11162256A true JPH11162256A (en) | 1999-06-18 |
Family
ID=18191451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32676597A Withdrawn JPH11162256A (en) | 1997-11-27 | 1997-11-27 | Insulating oil and ac oil-filled cable using it for arctic frigid zone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11162256A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016532257A (en) * | 2013-07-19 | 2016-10-13 | アルケマ フランス | Dielectric fluid composition or heat transfer fluid composition and use thereof |
-
1997
- 1997-11-27 JP JP32676597A patent/JPH11162256A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016532257A (en) * | 2013-07-19 | 2016-10-13 | アルケマ フランス | Dielectric fluid composition or heat transfer fluid composition and use thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20050201 |