JP3355908B2 - Method and apparatus for diagnosing deterioration of CV cable termination - Google Patents
Method and apparatus for diagnosing deterioration of CV cable terminationInfo
- Publication number
- JP3355908B2 JP3355908B2 JP04172196A JP4172196A JP3355908B2 JP 3355908 B2 JP3355908 B2 JP 3355908B2 JP 04172196 A JP04172196 A JP 04172196A JP 4172196 A JP4172196 A JP 4172196A JP 3355908 B2 JP3355908 B2 JP 3355908B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- gas
- circulation path
- cable
- terminal
- 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 - Fee Related
Links
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Testing Relating To Insulation (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電力ケーブルであ
るＣＶケーブルの終端部の劣化診断方法及び装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for diagnosing deterioration of a terminal portion of a CV cable which is a power cable.
【０００２】[0002]
【従来の技術】ＣＶケーブルは、ポリエチレン絶縁体を
架橋反応により立体網目状構造として耐熱性を向上させ
た架橋ポリエチレンで被覆された電力ケーブルであり、
６００〜５００，０００Ｖの広い電圧範囲において使用
されている。2. Description of the Related Art A CV cable is a power cable coated with cross-linked polyethylene in which a polyethylene insulator is formed into a three-dimensional network structure by a cross-linking reaction to improve heat resistance.
It is used in a wide voltage range from 600 to 500,000 V.
【０００３】ＣＶケーブルの終端接続部は、外部半導電
層を剥ぎ取られた架橋ポリエチレン絶縁層の上にポリエ
チレンシートを重ね巻きして絶縁補強を施し、さらにベ
ルマウスを設け、ストレスコーンを形成すると共に、こ
れらを絶縁油であるシリコン油に浸して形成されるもの
である。このＣＶケーブルの終端接続部は、劣化すると
内部で部分放電を発生させ、絶縁油が分解されて水素、
炭化水素ガス（メタン、アセチレン等）、一酸化炭素、
二酸化炭素などを発生させることが知られている。[0003] The terminal connection portion of the CV cable is wound around a cross-linked polyethylene insulating layer from which the outer semiconductive layer has been stripped to wrap a polyethylene sheet for insulation reinforcement, and further provided with a bell mouth to form a stress cone. At the same time, they are formed by immersing them in silicon oil which is an insulating oil. When the terminal connection part of this CV cable deteriorates, a partial discharge is generated inside, and the insulating oil is decomposed and hydrogen,
Hydrocarbon gas (methane, acetylene, etc.), carbon monoxide,
It is known to generate carbon dioxide and the like.
【０００４】このため、ＣＶケーブル終端部の絶縁劣化
を検知するために絶縁油中に含まれるガスの成分及びそ
の濃度を調べ、ＣＶケーブルの劣化状態を把握する手法
が従来から用いられている。For this reason, in order to detect the deterioration of the insulation at the end of the CV cable, a method of examining the components of the gas contained in the insulating oil and the concentration thereof and grasping the state of deterioration of the CV cable has been conventionally used.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、ＣＶケ
ーブル終端部の検査作業は人手により行われているた
め、現地まで絶縁油を採取しに行き、絶縁油を減圧して
油中に溶存しているガスを絶縁油から分離させ、このガ
スの成分をガスクロマトグラフィー等により分析測定す
るという一連の作業を人手でこなさなくてはならず繁雑
であり、また、安全のために採油作業の前にＣＶケーブ
ルの通電を一旦停止しなければならないため、随時に頻
繁にＣＶケーブルの絶縁劣化を診断することはできず、
ＣＶケーブル終端部の絶縁劣化を早期発見することは困
難であるという課題があった。However, since the inspection work of the terminal of the CV cable is performed manually, the insulating oil is taken to the site, the insulating oil is decompressed and dissolved in the oil. A series of operations of separating gas from insulating oil and analyzing and measuring the components of the gas by gas chromatography or the like must be performed manually, which is complicated. Since the power supply to the cable must be stopped once, the insulation deterioration of the CV cable cannot be diagnosed frequently at any time.
There has been a problem that it is difficult to detect insulation deterioration at the end of the CV cable at an early stage.
【０００６】そこで、本発明の目的は、上記課題を解決
し、ＣＶケーブル終端部の絶縁劣化の検査をＣＶケーブ
ルの通電を停止することなく常時頻繁かつ容易にできる
ＣＶケーブル終端部の劣化診断方法及び装置を提供する
ことにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a method of diagnosing deterioration of a CV cable terminal end that can be frequently and easily inspected for insulation deterioration of a CV cable terminal without stopping power supply to the CV cable. And a device.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明は、終端接続箱内に収容された絶縁油に浸され
て絶縁されたＣＶケーブル終端部の劣化診断方法におい
て、終端接続箱内の絶縁油を抜き取ると共に再度戻す循
環路を形成し、その循環路を流れる絶縁油中の油中溶存
ガスを分離捕捉し、その捕捉した油中溶存ガスをガスセ
ンサーを用いて監視するものである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a method for diagnosing deterioration of a CV cable terminal portion insulated by being immersed in insulating oil contained in a terminal connection box. A circuit is formed to extract and return the insulating oil inside the circuit, and to separate and capture the dissolved gas in the oil in the insulating oil flowing through the circuit, and monitor the captured dissolved gas in the oil using a gas sensor. is there.
【０００８】また、絶縁油がシリコン油であり、劣化で
生じた油中溶存ガスがアセチレンガスであり、そのアセ
チレンガス濃度を光式ガスセンサーを用いて計測し、そ
の劣化度を診断するものとするとよい。Further, the insulating oil is silicon oil, the dissolved gas in the oil generated by the deterioration is acetylene gas, and the acetylene gas concentration is measured using an optical gas sensor to diagnose the degree of deterioration. Good to do.
【０００９】そして、上記のＣＶケーブル終端部の劣化
診断を、終端接続箱内の絶縁油を抜き取ると共にこれを
戻す循環路と、その循環路に接続され、循環路中を流れ
る絶縁油中から油中溶存ガスを分離捕捉する油中ガス分
離捕捉手段と、その油中ガス分離捕捉手段で捕捉された
油中溶存ガスを検出するガスセンサーとを備えたＣＶケ
ーブル終端部の劣化診断装置で行うとよい。[0009] The above-mentioned deterioration diagnosis of the CV cable terminal portion is performed by extracting the insulating oil from the terminal connection box and returning it to the circulation path, and connecting the oil to the circulation path through the oil flowing through the circulation path. When the deterioration diagnosis device at the end of the CV cable is equipped with a gas-in-oil separation / capturing means for separating and capturing dissolved gas in oil and a gas sensor for detecting dissolved gas in oil captured by the gas-in-oil separation capturing means, Good.
【００１０】そしてさらに、油中ガス分離捕捉手段は、
循環路に接続される液相室と、その液相室とフィルタを
介して接続された気相室とからなり、その気相室に光式
ガスセンサーが設けられたものとするとよい。[0010] Further, the gas-in-oil separation and capture means includes:
It is preferable that the gas chamber comprises a liquid phase chamber connected to the circulation path and a gas phase chamber connected to the liquid phase chamber via a filter, and the gas phase chamber is provided with an optical gas sensor.
【００１１】また、終端接続箱が水平に配置され、循環
路の採油口と戻し口とは上下に配置され、絶縁油は油の
自然対流で循環路を流れるものとするとよく、循環路に
循環ポンプを接続して強制循環させたり、循環路に熱対
流を発生させるヒータを取り付けてもよい。The terminal junction box is disposed horizontally, the oil inlet and the return port of the circulation path are arranged vertically, and the insulating oil may flow through the circulation path by natural convection of the oil. A pump may be connected for forced circulation, or a heater for generating heat convection may be attached to the circulation path.
【００１２】あるいはまた、終端接続箱内の絶縁油の採
油口に仕切りを設け、その一方を循環路の油抜き取り口
に、他方を循環路の油戻し口に接続し、循環路に循環ポ
ンプを接続して強制循環させたり、循環路に熱対流を発
生させるヒータを取り付けてもよい。Alternatively, a partition is provided at an insulating oil sampling port in the terminal connection box, one of which is connected to an oil extraction port of the circulation path and the other is connected to an oil return port of the circulation path, and a circulation pump is connected to the circulation path. A heater for generating forced convection may be attached to the circulation path by connection.
【００１３】[0013]
【発明の実施の形態】本発明の好適実施の形態を添付図
面に基づいて詳述する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
【００１４】図１に示すように、ＣＶケーブル１の終端
部２は、外部半導電層（図示せず）が剥ぎ取られて剥き
出された架橋ポリエチレン絶縁層３の上に補強ポリエチ
レンシート４を重ね巻きして絶縁補強されており、さら
にその上には電界集中を緩和するためにベルマウス５を
設けストレスコーン６が形成されている。そして、これ
らをエポキシ碍子７と金属タンク８とからなる終端接続
箱９で所定の間隔を隔てて囲繞すると共にその間に絶縁
油であるシリコン油１０を満たして形成されている。Ｃ
Ｖケーブル１の終端部２と終端接続箱９は共に水平に配
置されており、ＣＶケーブル１が挿通される終端接続箱
９の一端には縮径部１１が設けられている。As shown in FIG. 1, an end portion 2 of the CV cable 1 is provided with a reinforcing polyethylene sheet 4 on a cross-linked polyethylene insulating layer 3 from which an outer semiconductive layer (not shown) is peeled off. It is wound up and reinforced for insulation, and a bell mouth 5 is provided thereon to alleviate electric field concentration, and a stress cone 6 is formed thereon. These are surrounded at predetermined intervals by a terminal connection box 9 comprising an epoxy insulator 7 and a metal tank 8, and are filled with a silicone oil 10 as an insulating oil therebetween. C
The terminal end 2 of the V cable 1 and the terminal connection box 9 are both arranged horizontally, and a reduced diameter portion 11 is provided at one end of the terminal connection box 9 through which the CV cable 1 is inserted.
【００１５】ＣＶケーブル１の終端部２の劣化診断装置
１２は、終端接続箱９に設けられるものであり、終端接
続箱９内のシリコン油１０を循環させて抜き取ると共に
これを戻す循環路１３と、その循環路１３に接続され、
循環路１３中を流れるシリコン油１０中から油中溶存ガ
ス（図示せず）を分離捕捉する油中ガス分離捕捉手段１
４と、油中ガス分離捕捉手段１４で捕捉された油中溶存
ガスを検出するガスセンサー１５とからなる。A deterioration diagnosis device 12 for the terminal end portion 2 of the CV cable 1 is provided in the terminal connection box 9, and circulates the silicone oil 10 in the terminal connection box 9 to extract and return the same. , Connected to its circulation path 13,
Gas-in-oil separation and capture means 1 for separating and capturing dissolved gas (not shown) in oil from silicon oil 10 flowing in circulation path 13
4 and a gas sensor 15 for detecting dissolved gas in oil captured by the gas-in-oil capture unit 14.
【００１６】循環路１３は、縮径部１１の上端から延長
して設けられ油中ガス分離捕捉手段１４に接続される第
１送油管１６と、縮径部１１の下端から延長して設けら
れ油中ガス分離捕捉手段１４に接続される第２送油管１
７とからなる。第１送油管１６の終端接続箱９との接続
部分にはシリコン油１０を第１送油管１６内に流入させ
るための採油口２５が形成され、第２送油管１７の終端
接続箱９との接続部分にはシリコン油１０を終端接続箱
９内に戻すための戻し口２６が形成されている。The circulation path 13 is provided extending from the upper end of the reduced diameter portion 11 and connected to the gas-in-oil capturing means 14. The first oil feed pipe 16 is provided extending from the lower end of the reduced diameter portion 11. Second oil feed pipe 1 connected to gas-in-oil capture and capture means 14
7 An oil sampling port 25 for allowing the silicon oil 10 to flow into the first oil feed pipe 16 is formed at a connection portion of the first oil feed pipe 16 with the terminal connection box 9, and is connected to the end oil connection port 9 of the second oil feed pipe 17. A return port 26 for returning the silicone oil 10 into the terminal connection box 9 is formed in the connection portion.
【００１７】また、第１送油管１６と第２送油管１７と
は油中ガス分離捕捉手段１４を介して接続されており、
終端接続箱９内のシリコン油１０が自然対流により採油
口２５を経て第１送油管１６内に流入し、油中ガス分離
捕捉手段１４内及び第２送油管１７内を通過し、戻し口
２６を経て終端接続箱９内に戻るようになっている。The first oil feed pipe 16 and the second oil feed pipe 17 are connected via a gas-in-oil separation / capture means 14,
The silicon oil 10 in the terminal connection box 9 flows into the first oil feed pipe 16 through the oil inlet 25 by natural convection, passes through the gas-in-oil separation / capture means 14 and the second oil feed pipe 17, and returns to the return port 26. Through the terminal box 9.
【００１８】油中ガス分離捕捉手段１４は、シリコン油
１０を入れる液相室１８と、シリコン油１０内から分離
された油中溶存ガスを入れる気相室１９とからなる。液
相室１９は、第１送油管１６と第２送油管１７とに接続
されており、内部に第１送油管１６及び第２送油管１７
のいずれかの送油管から流入するシリコン油１０で満た
されている。液相室１８内のシリコン油１０は第１送油
管１６及び第２送油管１７のいずれの送油管に対しても
流出入自在となっており、終端接続箱９内のシリコン油
１０の液温差等により発生する自然対流によりシリコン
油１０が循環するようになっている。気相室１９は、液
相室１８とフィルタ２０を挟んで隣接しており、フィル
タ２０を透過してくる油中溶存ガスを内部に溜められる
ようになっている。フィルタ２０は、多孔質金属に高分
子膜を融着させてなるものであり、油を通過させること
なくガスのみを通過させる性質を有するものである。The gas-in-oil separation / capturing means 14 comprises a liquid phase chamber 18 for holding the silicon oil 10 and a gas phase chamber 19 for holding the dissolved gas in the oil separated from the inside of the silicon oil 10. The liquid phase chamber 19 is connected to the first oil feed pipe 16 and the second oil feed pipe 17 and has therein the first oil feed pipe 16 and the second oil feed pipe 17.
Is filled with the silicon oil 10 flowing from any one of the oil feed pipes. The silicone oil 10 in the liquid phase chamber 18 can freely flow into and out of both the first oil feed pipe 16 and the second oil feed pipe 17, and the liquid temperature difference of the silicon oil 10 in the terminal connection box 9. The silicon oil 10 is circulated by natural convection generated by the above. The gas phase chamber 19 is adjacent to the liquid phase chamber 18 with the filter 20 interposed therebetween, and is capable of storing dissolved gas in oil permeating the filter 20 therein. The filter 20 is formed by fusing a polymer film to a porous metal, and has a property of passing only gas without passing oil.
【００１９】ガスセンサー１５は、ＣＶケーブル終端部
２で発生する電磁ノイズの影響を受けにくい光式のもの
であり、主にレーザー光線を生成すると共にそのレーザ
ー光線を気相室１９内の油中溶存ガスを透過させ、レー
ザー光線の強度変化からアセチレンガスの濃度を検出す
る監視装置２１と、この監視装置２１で生成したレーザ
ー光線を気相室１９内に伝達する第１光ファイバ２２
と、気相室１９内を透過したレーザー光線を監視装置２
１内に伝達する第２光ファイバ２３とからなる。The gas sensor 15 is of an optical type which is hardly affected by electromagnetic noise generated at the CV cable end portion 2. The gas sensor 15 mainly generates a laser beam and outputs the laser beam to a dissolved gas in oil in a gas phase chamber 19. And a first optical fiber 22 for transmitting the laser beam generated by the monitoring device 21 into the gas phase chamber 19 by detecting the concentration of acetylene gas from a change in the intensity of the laser beam.
And the laser beam transmitted through the gas phase chamber 19
1 and a second optical fiber 23 for transmitting light into the optical fiber 1.
【００２０】監視装置２１は、油中溶存ガスに含まれる
アセチレンガスの吸収スペクトルに一致する波長を有す
る光を生成する発光手段（図示せず）と、アセチレンガ
スの吸収スペクトルに一致する波長の光成分を分別抽出
すると共に光電変換する受光手段（図示せず）とからな
る。監視装置２１は、分子の回転、振動により特定の波
長の光を吸収するアセチレン等の炭化水素ガスの性質を
利用して気相室１９内のアセチレンガスの存在を検知す
るようにしたものであり、アセチレンガスにより吸収さ
れた特定波長の吸収量によりガス濃度を測ることができ
るようになっている。The monitoring device 21 includes a light emitting means (not shown) for generating light having a wavelength corresponding to the absorption spectrum of acetylene gas contained in the dissolved gas in oil, and a light having a wavelength matching the absorption spectrum of acetylene gas. And a light receiving means (not shown) for separating and extracting the components and performing photoelectric conversion. The monitoring device 21 detects the presence of acetylene gas in the gas phase chamber 19 by utilizing the properties of hydrocarbon gas such as acetylene that absorbs light of a specific wavelength due to rotation and vibration of molecules. The gas concentration can be measured based on the absorption amount of a specific wavelength absorbed by the acetylene gas.
【００２１】このように、部分放電により発生するガス
のうち特にアセチレンガスの成分を選んで検出する理由
は、アセチレンガスは、油中部分放電によって初めて生
成されるものであるのに対し、水素、炭化水素、メタ
ン、一酸化炭素、二酸化炭素等の他のガスは、ＣＶケー
ブル絶縁体中の架橋剤分解残滓成分が絶縁油に溶け出
し、劣化がなくても検出されるものであるためである。As described above, the reason why the component of acetylene gas is particularly selected and detected among the gases generated by partial discharge is that acetylene gas is generated for the first time by partial discharge in oil, whereas hydrogen, Other gases such as hydrocarbons, methane, carbon monoxide, and carbon dioxide are detected even if the cross-linking agent decomposition residue component in the CV cable insulator dissolves into the insulating oil and does not deteriorate. .
【００２２】第１光ファイバ２２は、一端を監視装置２
１の発光手段に接続されると共に他端を気相室１９内に
挿入されてこの他端にレーザー発信部２４ａを形成して
おり、発光手段から発せられたレーザー光線を気相室１
９内に伝達して照射できるようになっている。The first optical fiber 22 has one end connected to the monitoring device 2.
1 and the other end is inserted into the vapor phase chamber 19 to form a laser emitting portion 24a at the other end, and the laser beam emitted from the light emitting means is supplied to the vapor phase chamber 1
9 for irradiation.
【００２３】第２光ファイバ２３は、一端を気相室１９
内に挿入されて一端にレーザー受信部２４ｂを形成する
と共に他端を監視装置２１の受光手段に接続されてお
り、特にレーザー受信部２４ｂは、第１光ファイバ２２
のレーザー発信部２４ａに向かい合わせとなるように配
置され、第１光ファイバ２２の他端から発せられ気相室
１９内を透過したレーザー光線を受けられるようになっ
ている。The second optical fiber 23 has one end connected to the vapor chamber 19.
And the other end is connected to the light receiving means of the monitoring device 21. In particular, the laser receiving portion 24b is connected to the first optical fiber 22b.
The first optical fiber 22 receives a laser beam emitted from the other end of the first optical fiber 22 and transmitted through the inside of the gas phase chamber 19.
【００２４】次に作用を述べる。Next, the operation will be described.
【００２５】終端接続箱９内のシリコン油１０は、液温
差等により自然対流し、循環路１３内を流れる。このと
き、シリコン油１０は、油中ガス分離捕捉手段１４の液
相室１８内を通過するため、終端接続箱９内の部分放電
によりアセチレン等のガスが生じてシリコン油１０中に
溶存している場合、この油中溶存ガスは、フィルタ２０
を透過して気相室１９内に分離捕捉される。The silicon oil 10 in the terminal connection box 9 naturally convects due to a liquid temperature difference or the like, and flows through the circulation path 13. At this time, since the silicon oil 10 passes through the liquid phase chamber 18 of the gas-in-oil separation / capturing means 14, a gas such as acetylene is generated by partial discharge in the terminal connection box 9 and dissolved in the silicon oil 10. In this case, the dissolved gas in the oil
And is separated and captured in the gas phase chamber 19.
【００２６】監視装置２１が稼動されている状態にあっ
ては監視装置２１内の発光手段でレーザー光線が生成さ
れており、レーザー光線は第１光ファイバ２２内を伝達
してレーザー発信部２４ａに至り、油中ガス分離捕捉手
段１４の気相室１９内に照射される。When the monitoring device 21 is in operation, a laser beam is generated by the light emitting means in the monitoring device 21, and the laser beam is transmitted through the first optical fiber 22 and reaches the laser transmitting section 24a. Irradiation is performed in the gas phase chamber 19 of the gas-in-oil capture / separation means 14.
【００２７】気相室１９内に照射されたレーザー光線
は、気相室１９内を通過する際にアセチレンガス等気相
室１９内に存在する炭化水素ガスの吸収スペクトルと一
致する波長が吸収されて弱くなる。そして、レーザー光
線は、第２光ファイバ２３のレーザー受信部２４ｂに至
り、第２光ファイバ２３を介して監視装置２１内の受光
手段に伝達される。The laser beam irradiated into the gas phase chamber 19 absorbs a wavelength that coincides with the absorption spectrum of a hydrocarbon gas such as acetylene gas existing in the gas phase chamber 19 when passing through the gas phase chamber 19. become weak. Then, the laser beam reaches the laser receiving section 24 b of the second optical fiber 23 and is transmitted to the light receiving means in the monitoring device 21 via the second optical fiber 23.
【００２８】受光手段は、レーザー光線のアセチレンガ
スの吸収スペクトルに一致する波長の光成分を分別抽出
すると共に光電変換し、アセチレンガスに吸収された光
成分の量を測る。このことにより、気相室１９内に分離
捕捉されたアセチレンガスの量が計測され、終端接続箱
９内でどの程度の部分放電が発生しているかがおおよそ
検知される。The light receiving means separates and extracts a light component having a wavelength corresponding to the absorption spectrum of the acetylene gas of the laser beam, performs photoelectric conversion, and measures the amount of the light component absorbed by the acetylene gas. Thus, the amount of acetylene gas separated and captured in the gas phase chamber 19 is measured, and it is roughly detected how much partial discharge has occurred in the terminal connection box 9.
【００２９】次にこのＣＶケーブル終端部の劣化診断装
置の有効性を検証するために実施した実験の方法とその
結果を述べる。Next, a description will be given of a method of an experiment conducted to verify the effectiveness of the degradation diagnostic apparatus for the CV cable terminal section and the results thereof.
【００３０】実験は端末補強シート巻部（ストレスコー
ン部）の欠陥により部分放電が発生した場合（以下、
「検証１」という）と、ポリエチレンベルマウス内部の
欠陥のより部分放電が発生した場合（以下、「検証２」
という）とについて模擬的に部分放電を発生するＣＶケ
ーブル終端部を作成して行った。The experiment was conducted when a partial discharge was generated due to a defect in the end reinforcing sheet winding portion (stress cone portion) (hereinafter, referred to as “stress cone portion”).
"Verification 1") and when partial discharge occurs due to a defect inside the polyethylene bell mouse (hereinafter referred to as "Verification 2").
This was performed by simulating the termination of a CV cable that generates partial discharge.
【００３１】図２に示すように、検証１は、図１に示す
ケーブル終端部２のポリエチレンシート４と半導電層シ
ート２７界面に金属異物７０を入れて端末補強シート巻
部２８から部分放電が発生するようにしたものを使用
し、ＣＶケーブル１の導体１ａに７０ｋｖの電気を課電
したまま定期的に光式ガスセンサーで油中に溶存してい
るアセチレンの濃度を測定すると共に直接シリコン油を
抜き出して油中ガスの分析を行ったものである。As shown in FIG. 2, in verification 1, a metal foreign matter 70 was put in the interface between the polyethylene sheet 4 and the semiconductive layer sheet 27 of the cable end portion 2 shown in FIG. While using 70 kv of electricity applied to the conductor 1a of the CV cable 1, the concentration of acetylene dissolved in the oil is periodically measured with an optical gas sensor while the conductor 1a of the CV cable 1 is used. Was analyzed for gas in oil.
【００３２】結果は図４に示すとおりであり、光式ガス
センサーで測定した場合は，直接シリコン油を抜き出し
て分析した場合と比較して数日遅れてアセチレン濃度の
変化が検出されることとなるが、光式ガスセンサーでも
アセチレンの増加傾向が明確に現れており、本実施の形
態で示すＣＶケーブル終端部２の劣化診断装置１２が有
効にアセチレン濃度の変化を検出してＣＶケーブル終端
部２の劣化を検知できることが確認される。The results are as shown in FIG. 4. When the measurement was performed by the optical gas sensor, the change in the acetylene concentration was detected several days later than when the silicon oil was directly extracted and analyzed. However, even the optical gas sensor clearly shows a tendency to increase acetylene, and the deterioration diagnosis device 12 of the CV cable terminal 2 shown in the present embodiment effectively detects a change in acetylene concentration and detects the change in acetylene concentration. It is confirmed that deterioration of No. 2 can be detected.
【００３３】また図３に示すように、検証２は、図１に
示すケーブル端末部のポリエチレンベルマウス５内にボ
イド欠陥２９ａと、このボイド欠陥２９ａから延びる電
気トリー２９ｂとを模擬的に作成したものを使用し、Ｃ
Ｖケーブル１に７０ｋｖの電気を課電したまま定期的に
光式ガスセンサーで油中に溶存しているアセチレンの濃
度を測定すると共に直接シリコン油を抜き出して油中ガ
スの分析を行ったものである。As shown in FIG. 3, in the verification 2, a void defect 29a and an electric tree 29b extending from the void defect 29a were simulated in the polyethylene bell mouth 5 of the cable terminal shown in FIG. Use something, C
The concentration of acetylene dissolved in oil was periodically measured with an optical gas sensor while applying 70 kv of electricity to the V cable 1, and silicon oil was directly extracted to analyze gas in oil. is there.
【００３４】なお、ボイド欠陥２９ａ及び電気トリー２
９ｂは、ポリエチレン製のベルマウス５にドリルで穴を
あけ、穴の奥に針を挿入すると共に針に電圧を印加して
電気トリー２９ｂを作成し、さらに針を抜き、穴の入口
をポリエチレンで塞いでボイド欠陥２９ａを作成したも
のである。The void defect 29a and the electrical tree 2
9b, a hole is drilled in the bell mouth 5 made of polyethylene, a needle is inserted into the back of the hole, and a voltage is applied to the needle to create an electric tree 29b. Further, the needle is pulled out, and the entrance of the hole is made of polyethylene. The void defect 29a is created by closing.
【００３５】結果は、図５に示すとおりであり、光式ガ
スセンサーで測定した場合でも直接シリコン油を抜き出
して分析した場合と同様にアセチレンの増加傾向が明確
に現れており、本実施の形態で示すＣＶケーブル終端部
２の劣化診断装置１２が有効にアセチレン濃度の変化を
検出してＣＶケーブル終端部２の劣化を検知できること
が確認される。このことは、本実施の形態で示すＣＶケ
ーブル終端部２の劣化診断装置１２は、絶縁油であるシ
リコン油に直接接していないベルマウス５内部のボイド
欠陥２９ａから電気トリー２９ｂが発生して劣化が進展
していく過程をも有効に検知できることを示すものであ
る。The results are as shown in FIG. 5, and the tendency of increasing acetylene is clearly shown even when the measurement is made with the optical gas sensor, as in the case where the silicon oil is directly extracted and analyzed. It is confirmed that the deterioration diagnosis device 12 of the CV cable terminal section 2 can effectively detect the change of the acetylene concentration and detect the deterioration of the CV cable terminal section 2 as shown by. This means that the deterioration diagnosis device 12 of the CV cable terminal portion 2 shown in the present embodiment is deteriorated by the generation of the electrical tree 29b from the void defect 29a inside the bell mouth 5 which is not directly in contact with the silicone oil which is the insulating oil. This indicates that the process of evolving can be effectively detected.
【００３６】また、これらの実験結果から、本実施の形
態で示すＣＶケーブル終端部２の劣化診断装置１２が実
線路のＣＶケーブル終端部２に有効に適用できるもので
あることが確認される。From these experimental results, it is confirmed that the deterioration diagnosis device 12 for the CV cable terminal 2 shown in the present embodiment can be effectively applied to the CV cable terminal 2 of the actual line.
【００３７】このように、ＣＶケーブル１の終端部２に
終端接続箱９内のシリコン油（絶縁油）１０を抜き取る
と共に再度終端接続箱９内に戻す循環路１３を形成し、
その循環路１３を流れるシリコン油１０中の油中溶存ガ
スを分離捕捉し、その捕捉した油中溶存ガスをガスセン
サー１５を用いて監視するようにしたため、終端接続箱
９内の油中溶存ガスを常時監視でき、早期かつ確実に終
端部２の異状及び劣化を検出でき、ケーブル終端部の損
壊を未然に防止できる。In this way, a circulation path 13 is formed at the end portion 2 of the CV cable 1 to remove the silicone oil (insulating oil) 10 from the terminal connection box 9 and return it to the terminal connection box 9 again.
Since the dissolved gas in the oil in the silicon oil 10 flowing through the circulation path 13 is separated and captured, and the captured dissolved gas in the oil is monitored using the gas sensor 15, the dissolved gas in the oil in the terminal connection box 9 is monitored. Can be constantly monitored, abnormalities and deterioration of the terminal section 2 can be detected early and reliably, and damage to the cable terminal section can be prevented.
【００３８】また、絶縁油をシリコン油１０とし、劣化
で生じる油中溶存ガスをアセチレンガスとし、そのアセ
チレンガス濃度をＣＶケーブル終端部で発生する電磁ノ
イズの影響を受けにくい光式ガスセンサー１５を用いて
計測することにより終端部２の劣化度を診断するように
したため、容易かつ確実に終端部２の劣化を診断するこ
とができる。Further, the insulating oil is silicon oil 10, the dissolved gas in the oil generated by the deterioration is acetylene gas, and the concentration of the acetylene gas is determined by the optical gas sensor 15 which is hardly affected by the electromagnetic noise generated at the end of the CV cable. Since the degree of deterioration of the terminal portion 2 is diagnosed by using the measurement, the deterioration of the terminal portion 2 can be diagnosed easily and reliably.
【００３９】そして、ＣＶケーブル終端部２の劣化診断
装置１２を終端接続箱９内のシリコン油１０を抜き取る
と共にこれを戻す循環路１３と、その循環路１３に接続
され、循環路１３中を流れるシリコン油１０中から油中
溶存ガスを分離捕捉する油中ガス分離捕捉手段１４と、
その油中ガス分離捕捉手段１４で捕捉された油中溶存ガ
スを検出するガスセンサー１５とを備えたものとしたた
め、終端接続箱９内の油中溶存ガスを常時監視でき、早
期かつ確実に終端部２の異状及び劣化を検出でき、ケー
ブル終端部の損壊を未然に防止できる。Then, the deterioration diagnostic device 12 of the CV cable terminal portion 2 extracts the silicon oil 10 in the terminal connection box 9 and returns it to the circulation path 13, and is connected to the circulation path 13 and flows through the circulation path 13. Gas-in-oil separation and capture means 14 for separating and capturing dissolved gas in oil from silicon oil 10;
A gas sensor 15 for detecting the dissolved gas in the oil captured by the gas-in-oil separating and capturing means 14 is provided, so that the dissolved gas in the oil in the terminal connection box 9 can be constantly monitored, and the terminal can be quickly and reliably terminated. Abnormality and deterioration of the portion 2 can be detected, and damage to the cable terminal portion can be prevented.
【００４０】そしてさらに、油中ガス分離捕捉手段１４
を循環路１３に接続される液相室１８とその液相室１８
とフィルタ２０を介して接続された気相室１９とからな
り、その気相室１８に光式ガスセンサー１５を設けたた
め、簡単な構造でシリコン油１０中から油中溶存ガスを
分離捕捉することができ、容易かつ確実に油中に溶存し
ているアセチレンガスを検出し、その濃度を測定するこ
とができる。Further, the gas-in-oil separation and capture means 14
And a liquid phase chamber 18 connected to the circulation path 13
And a gas phase chamber 19 connected via a filter 20. Since the optical gas sensor 15 is provided in the gas phase chamber 18, the dissolved gas in the oil can be separated and captured from the silicon oil 10 with a simple structure. The acetylene gas dissolved in the oil can be detected easily and reliably, and the concentration thereof can be measured.
【００４１】また、終端接続箱９を水平に配置すると共
に循環路１３の採油口２５と戻し口２６とを上下に配置
し、シリコン油１０が油の自然対流で循環路１３を流れ
るようにしたため、終端部２の周囲のシリコン油１０を
油中ガス分離捕捉手段１４の中に導くことができ、早期
に終端部２の劣化を検出できる。Also, the terminal connection box 9 is arranged horizontally, and the oil sampling port 25 and the return port 26 of the circulation path 13 are arranged vertically so that the silicon oil 10 flows through the circulation path 13 by natural convection of the oil. In addition, the silicon oil 10 around the terminal portion 2 can be guided into the oil-in-oil gas separating / capturing means 14, and deterioration of the terminal portion 2 can be detected at an early stage.
【００４２】なお、上述の発明の実施の形態は、水平に
配置された終端接続箱９の上下に第１送油管１６と第２
送油管１７とを設け、自然対流によりシリコン油１０を
循環させるようにしたものであるが、垂直に配置された
終端接続箱の場合、第１送油管１６と第２送油管１７と
が水平に配置されることとなるため、図６に示すよう
に、ＣＶケーブル終端部２の劣化診断装置３０の循環路
３１に循環ポンプ３２を設けるとよい。In the above-described embodiment, the first oil feed pipe 16 and the second oil feed pipe 16 are disposed above and below the horizontally arranged terminal connection box 9.
An oil feed pipe 17 is provided to circulate the silicon oil 10 by natural convection. In the case of a vertically arranged terminal connection box, the first oil feed pipe 16 and the second oil feed pipe 17 are arranged horizontally. Therefore, as shown in FIG. 6, it is preferable to provide a circulation pump 32 in the circulation path 31 of the deterioration diagnosis device 30 of the CV cable terminal 2.
【００４３】この劣化診断装置３０は、終端接続箱３３
の側部に一端を接続された第１送油管３４と、第１送油
管３４の他端に接続された油中ガス分離捕捉手段１４
と、油中ガス分離捕捉手段１４に第１送油管３４の他端
と向かい合わせとなるように一端を接続された第２送油
管３５と、上述の発明の実施の形態と同様に油中ガス分
離捕捉手段１４に設けられた監視装置（図示せず）とか
らなる。The deterioration diagnosis device 30 is provided with a terminal connection box 33
A first oil feed pipe 34 having one end connected to the side of the first oil feed pipe, and a gas-in-oil separating / capturing means 14 connected to the other end of the first oil feed pipe 34.
A second oil feed pipe 35 having one end connected to the gas-in-oil separation / capturing means 14 so as to face the other end of the first oil feed pipe 34; and a gas-in-oil gas as in the above-described embodiment of the present invention. And a monitoring device (not shown) provided in the separation and capture means 14.
【００４４】第２送油管３５の途中には循環ポンプ３２
が接続して設けられており、循環路３１中の絶縁油を強
制的に循環させるようになっている。この場合、絶縁油
の循環方向は、第１送油管３４から第２送油管３５に向
かう方向であっても、その逆の方向であってもどちらで
もよい。In the middle of the second oil feed pipe 35, the circulation pump 32
Are connected to each other so that the insulating oil in the circulation path 31 is forcibly circulated. In this case, the direction of circulation of the insulating oil may be either the direction from the first oil pipe 34 to the second oil pipe 35 or the opposite direction.
【００４５】このように循環路３１に循環ポンプ３２を
接続してシリコン油１０を強制循環させると、シリコン
油１０が循環路３１中で滞ることはなくなり、シリコン
油１０中に発生するアセチレンを速やかに検出すること
ができる。When the circulation pump 32 is connected to the circulation path 31 to forcibly circulate the silicon oil 10 in this manner, the silicon oil 10 does not stay in the circulation path 31 and the acetylene generated in the silicon oil 10 is quickly removed. Can be detected.
【００４６】また、上述のように終端接続箱が垂直に配
置されている場合、図７に示すように、ＣＶケーブル終
端部２の劣化診断装置４０の循環路４１にヒータ４２を
設けても良い。When the terminal connection box is vertically arranged as described above, a heater 42 may be provided in the circulation path 41 of the deterioration diagnosis device 40 of the CV cable terminal 2 as shown in FIG. .
【００４７】この劣化診断装置４０は、終端接続箱４３
の側部に一端を接続された第１送油管４４と、第１送油
管４４の他端に接続された油中ガス分離捕捉手段１４
と、油中ガス分離捕捉手段１４に第１送油管４４の他端
と向かい合わせとなるように一端を接続され他端を終端
接続箱４３の側部に接続された第２送油管４５と、上述
の発明の実施の形態と同様に油中ガス分離捕捉手段１４
に設けられた監視装置（図示せず）とからなる。The deterioration diagnosis device 40 is provided with a terminal connection box 43
A first oil feed pipe 44 having one end connected to the side of the first oil feed pipe, and a gas-in-oil separating / capturing means 14 connected to the other end of the first oil feed pipe 44.
A second oil feed pipe 45 having one end connected to the gas-in-oil capture means 14 so as to face the other end of the first oil feed pipe 44 and the other end connected to the side of the terminal connection box 43; As in the embodiment of the invention described above, the gas-in-oil separation and capture means 14
And a monitoring device (not shown).
【００４８】第２送油管４５の周囲にはヒータ４２が設
けられており、熱対流により絶縁油が循環路４１中を第
１送油管４４から油中ガス分離捕捉手段１４を経て第２
送油管４５の方向に循環するようになっている。A heater 42 is provided around the second oil feed pipe 45, and the insulating oil flows through the circulation path 41 from the first oil feed pipe 44 via the gas-in-oil separating / capturing means 14 by the heat convection.
It circulates in the direction of the oil feed pipe 45.
【００４９】このように循環路４１に熱対流を発生させ
るヒータ４２を取り付けても、シリコン油１０が循環路
４１中で滞ることはなくなり、シリコン油１０中に発生
するアセチレンを速やかに検出することができる。Even if the heater 42 for generating heat convection is attached to the circulation path 41, the silicon oil 10 does not stay in the circulation path 41, and acetylene generated in the silicon oil 10 can be quickly detected. Can be.
【００５０】そして、終端接続箱に１つの穴しか開けら
れない等採油口と戻し口とを別々に設けられない場合
は、図８に示すように、シリコン油１０を抜き取るため
に終端接続箱５１に設ける劣化診断装置５０の採油口５
２に仕切板６０を設けて分割し、分割した一方の穴５３
ａを循環路５４の油抜き取り口５５に接続すると共に他
方の穴５３ｂに循環路５４の油戻し口５６に接続してシ
リコン油１０の流れる経路を分けるとよい。When the oil collecting port and the return port cannot be separately provided, for example, only one hole is formed in the terminal connection box, as shown in FIG. Port 5 of the deterioration diagnosis device 50 provided in the
2, a partition plate 60 is provided and divided, and one of the divided holes 53 is provided.
A may be connected to the oil extraction port 55 of the circulation path 54, and the other hole 53b may be connected to the oil return port 56 of the circulation path 54 to divide the flow path of the silicon oil 10.
【００５１】この劣化診断装置５０は、終端接続箱５１
の側部に接続され内部に２つの穴５３ａ，５３ｂを有す
る採油口５２と、採油口５２の一方の穴５３ａに一端を
接続された第１送油管５７と、第１送油管５７の他端に
接続された油中ガス分離捕捉手段１４と、油中ガス分離
捕捉手段１４に第１送油管５７の他端と向かい合わせと
なるように一端を接続された第２送油管５８と、上述の
発明の実施の形態と同様に油中ガス分離捕捉手段１４に
設けられた監視装置（図示せず）とからなる。The deterioration diagnosis device 50 includes a terminal connection box 51.
, An oil inlet 52 having two holes 53a, 53b therein, a first oil feed pipe 57 having one end connected to one of the holes 53a of the oil inlet 52, and another end of the first oil feed pipe 57. A second oil feed pipe 58 having one end connected to the other end of the first oil feed pipe 57 so as to face the other end of the first oil feed pipe 57; A monitoring device (not shown) provided on the gas-in-oil separation / capturing means 14 similarly to the embodiment of the invention.
【００５２】第２送油管５８の途中には循環ポンプ５９
が接続して設けられており、循環路５４中のシリコン油
１０を強制的に循環させるようになっている。In the middle of the second oil feed pipe 58, a circulation pump 59
Are connected to each other so that the silicone oil 10 in the circulation path 54 is forcibly circulated.
【００５３】採油口５２は、図９に示すように、上下２
段に分割されており、上段に形成された穴５３ａに第１
送油管５７の油抜き取り口５５が接続されると共に、下
段にに形成された穴５３ｂに第２送油管５８の油戻し口
５６が接続されている。As shown in FIG.
It is divided into stages, and the first hole 53a is formed in the upper stage.
The oil removal port 55 of the oil feed pipe 57 is connected, and the oil return port 56 of the second oil feed pipe 58 is connected to a hole 53b formed in the lower stage.
【００５４】このように、終端接続箱５１内のシリコン
油１０の採油口５２に仕切板６０を設け、その一方を循
環路５４の油抜き取り口５５に、他方を循環路５４の油
戻し口５６に接続したため、戻し口を採油口５２内に形
成することができ、終端接続箱５１に設ける穴を最少限
にすることができる。As described above, the partition plate 60 is provided at the oil sampling port 52 of the silicon oil 10 in the terminal connection box 51, one of which is provided at the oil extracting port 55 of the circulation path 54, and the other is provided at the oil return port 56 of the circulation path 54. , The return port can be formed in the oil collecting port 52, and the number of holes provided in the terminal connection box 51 can be minimized.
【００５５】また、シリコン油１０の採油口５２を２分
割することで形成されるそれぞれの穴５３ａ，５３ｂ
に、油抜き取り口５５と油戻し口５６とをそれぞれ接続
し、第２送油管５８に循環ポンプ５９を設けたため、１
つの採油口で絶縁油を循環させることができ、絶縁油に
発生するアセチレンを速やかに検出することができる。
上述のように、循環を行うために循環ポンプを用いる場
合、循環流の方向は、特にどちらでもかまわない。一
方、循環の方法として、図１０に示すように、ヒータ４
２を第１送油管７７の一部に取り付けて、循環路７４内
で対流を発生させる方法も考えられる。その場合、循環
路７４内のシリコン油１０は、図１１に示すように、穴
５３ｂから第２送油管５８、第１送油管７７そして穴５
３ａの方向に流れる。また、この場合、循環路７４内で
ヒータ４２により温められたシリコン油１０は、穴５３
ａ内で上方に進むと考えられ、穴５３ａ、５３ｂでのシ
リコン油１０の混合が生じにくいと考えられ（穴５３
ａ、５３ｂで入出するシリコン油１０が混合すると、同
じ油が循環することとなり、油中ガスの分離効率が悪
い）、効率的に油中ガスを分離できると考えられる。Each of the holes 53a and 53b formed by dividing the oil inlet 52 of the silicon oil 10 into two parts.
The oil pump 55 and the oil return port 56 are connected to each other, and the circulation pump 59 is provided in the second oil feed pipe 58.
Insulating oil can be circulated through two oil inlets, and acetylene generated in the insulating oil can be detected quickly.
As described above, when a circulation pump is used to perform circulation, the direction of the circulation flow may be either direction. On the other hand, as shown in FIG.
2 may be attached to a part of the first oil feed pipe 77 to generate convection in the circulation path 74. In this case, as shown in FIG. 11, the silicon oil 10 in the circulation path 74 is supplied from the hole 53b through the second oil feed pipe 58, the first oil feed pipe 77 and the hole 5b.
It flows in the direction of 3a. In this case, the silicone oil 10 heated by the heater 42 in the circulation path 74 is
a, it is considered that mixing of the silicone oil 10 in the holes 53a, 53b is unlikely to occur (the holes 53a, 53b).
When the silicone oil 10 entering and exiting at 53a and 53b is mixed, the same oil circulates, and the efficiency of separating gas in oil is poor.) It is considered that gas in oil can be separated efficiently.
【００５６】また、気相室１９に採取した分離ガスを検
出する装置は、高感度に検出でき、かつ、常時監視可能
な装置であれば光式ガスセンサーでなくても良い。例え
ば、半導体式ガスセンサーであっても強磁界の影響を受
けない筺体設計を施す等により用いてもよい。The device for detecting the separated gas collected in the gas phase chamber 19 does not need to be an optical gas sensor as long as it can detect the gas with high sensitivity and can constantly monitor the gas. For example, a semiconductor gas sensor may be used by designing a housing that is not affected by a strong magnetic field.
【００５７】以上、ＣＶケーブル終端部の劣化について
述べてきたが、他にベルマウスの傷、ポリエチレンシー
トの傷、或いは外部半導電層処理時に誤ってＣＶケーブ
ルに付けた傷、施工時におけるポリエチレンシートの巻
き損じ等の初期欠陥に対しても、電圧印加時に放電が生
じるが、これらのものに対しても有効に検出が可能とな
る。The deterioration of the CV cable terminal portion has been described above. In addition, the bell mouth is damaged, the polyethylene sheet is damaged, or the CV cable is erroneously applied to the external semiconductive layer, or the polyethylene sheet is damaged during construction. Discharge occurs when a voltage is applied to an initial defect such as a winding defect of the above, but such a defect can be effectively detected.
【００５８】[0058]
【発明の効果】以上要するに本発明によれば、次のよう
な優れた効果を奏する。In summary, according to the present invention, the following excellent effects can be obtained.
【００５９】（１）請求項１に記載の発明によれば、油
中溶存ガスを常時監視でき、早期にＣＶケーブル終端部
の劣化を検出できる。(1) According to the first aspect of the present invention, the dissolved gas in the oil can be constantly monitored, and the deterioration of the terminal portion of the CV cable can be detected at an early stage.
【００６０】（２）請求項２に記載の発明によれば、容
易にＣＶケーブル終端部の劣化を診断することができ
る。(2) According to the second aspect of the invention, it is possible to easily diagnose the deterioration of the CV cable terminal.
【００６１】（３）請求項３に記載の発明によれば、油
中溶存ガスを常時監視でき、早期にＣＶケーブル終端部
の劣化を検出できる。(3) According to the third aspect of the present invention, the dissolved gas in the oil can be constantly monitored, and the deterioration of the terminal portion of the CV cable can be detected at an early stage.
【００６２】（４）請求項４に記載の発明によれば、容
易に油中に溶存している油中溶存ガスを検出でき、その
濃度を測定することができる。(4) According to the fourth aspect of the present invention, the dissolved gas in the oil dissolved in the oil can be easily detected and its concentration can be measured.
【００６３】（５）請求項５に記載の発明によれば、Ｃ
Ｖケーブル終端部周囲の絶縁油を油中ガス分離捕捉手段
の中に導くことができる。(5) According to the fifth aspect of the present invention, C
The insulating oil around the V cable end can be guided into the oil-in-oil separation and capture means.
【００６４】（６）請求項６に記載の発明によれば、絶
縁油中に発生する油中溶存ガスを速やかに検出すること
ができる。(6) According to the sixth aspect of the invention, the dissolved gas in the oil generated in the insulating oil can be detected quickly.
【００６５】（７）請求項７に記載の発明によれば、絶
縁油中に発生する油中溶存ガスを速やかに検出すること
ができる。(7) According to the seventh aspect of the present invention, the dissolved gas in the oil generated in the insulating oil can be detected quickly.
【００６６】（８）請求項８に記載の発明によれば、終
端接続箱に設ける穴の数を最少限に止めることができ
る。(8) According to the eighth aspect of the invention, the number of holes provided in the terminal connection box can be minimized.
【図１】本発明の好適実施の形態を示すＣＶケーブル終
端部の劣化診断装置の側面図である。FIG. 1 is a side view of an apparatus for diagnosing deterioration of a CV cable terminal section according to a preferred embodiment of the present invention.
【図２】図１の劣化診断装置の有効性を検証する実験で
用いた実験装置の要部拡大図である。FIG. 2 is an enlarged view of a main part of an experimental apparatus used in an experiment for verifying the effectiveness of the deterioration diagnostic apparatus of FIG.
【図３】図１の劣化診断装置の有効性を検証する実験で
用いた実験装置の要部拡大図である。FIG. 3 is an enlarged view of a main part of an experimental apparatus used in an experiment for verifying the effectiveness of the deterioration diagnostic apparatus of FIG. 1;
【図４】図１の劣化診断装置の有効性を検証するために
図２の実験装置を用いて行った実験の実験結果を表す線
図である。FIG. 4 is a diagram showing an experimental result of an experiment performed using the experimental apparatus of FIG. 2 to verify the effectiveness of the deterioration diagnostic apparatus of FIG. 1;
【図５】図１の劣化診断装置の有効性を検証するために
図３の実験装置を用いて行った実験の実験結果を表す線
図である。5 is a diagram showing an experimental result of an experiment performed using the experimental apparatus of FIG. 3 to verify the effectiveness of the deterioration diagnostic apparatus of FIG. 1;
【図６】本発明の他の好適実施の形態を示すＣＶケーブ
ル終端部の劣化診断装置の側面図である。FIG. 6 is a side view of an apparatus for diagnosing deterioration of a terminal portion of a CV cable according to another preferred embodiment of the present invention.
【図７】本発明の他の好適実施の形態を示すＣＶケーブ
ル終端部の劣化診断装置の側面図である。FIG. 7 is a side view of an apparatus for diagnosing deterioration of a CV cable terminal part according to another preferred embodiment of the present invention.
【図８】本発明の他の好適実施の形態を示すＣＶケーブ
ル終端部の劣化診断装置の側面図である。FIG. 8 is a side view of a degradation diagnostic device for a CV cable terminal section according to another preferred embodiment of the present invention.
【図９】図８の要部拡大図である。FIG. 9 is an enlarged view of a main part of FIG. 8;
【図１０】本発明の他の好適実施の形態を示すＣＶケー
ブル終端部の劣化診断装置の側面図である。FIG. 10 is a side view of an apparatus for diagnosing deterioration of a CV cable terminal portion according to another preferred embodiment of the present invention.
【図１１】図１０の要部拡大図である。FIG. 11 is an enlarged view of a main part of FIG. 10;
１ ＣＶケーブル ２ 終端部 ９ 終端接続箱 １０ シリコン油（絶縁油） １２ 劣化診断装置 １３ 循環路 １５ ガスセンサー １８ 液相室 １９ 気相室 ２０ フィルタ ２５ 採油口 ２６ 戻し口 ３２ 循環ポンプ ４２ ヒータ ５２ 採油口 ６０ 仕切板 DESCRIPTION OF SYMBOLS 1 CV cable 2 Termination part 9 Termination connection box 10 Silicon oil (insulating oil) 12 Degradation diagnosis device 13 Circulation path 15 Gas sensor 18 Liquid phase chamber 19 Gas phase chamber 20 Filter 25 Oil inlet 26 Return port 32 Circulation pump 42 Heater 52 Oil sampling Mouth 60 Divider
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中村 晃之 茨城県日立市日高町５丁目１番１号 日 立電線株式会社オプトロシステム研究所 内 (72)発明者 小林 正章 茨城県日立市日高町５丁目１番１号 日 立電線株式会社日高工場内 (72)発明者 山本 哲 茨城県日立市日高町５丁目１番１号 日 立電線株式会社オプトロシステム研究所 内 (56)参考文献 特開 平６−186158（ＪＰ，Ａ) 特開 平３−107778（ＪＰ，Ａ) 特開 昭59−126265（ＪＰ，Ａ) 特開 昭59−105538（ＪＰ，Ａ) 特開 昭63−98541（ＪＰ，Ａ) 実開 平７−41476（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 1/22 G01N 17/00 G01R 31/12 ＪＩＣＳＴファイル（ＪＯＩＳ)──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akiyuki Nakamura 5-1-1, Hidaka-cho, Hitachi City, Ibaraki Prefecture Within the Opto-System Research Laboratories, Tachibana Electric Wire Co., Ltd. (72) Masaaki Kobayashi Inventor Masaaki Kobayashi, Hitachi City, Ibaraki Prefecture 5-1-1 Takamachi Inside Hidaka Factory, Hitachi Cable Ltd. (72) Inventor Satoshi Yamamoto 5-1-1, Hidaka-cho, Hitachi City, Ibaraki Pref. References JP-A-6-186158 (JP, A) JP-A-3-107778 (JP, A) JP-A-59-126265 (JP, A) JP-A-59-105538 (JP, A) 63-98541 (JP, A) Japanese Utility Model 7-41476 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) G01N 1/22 G01N 17/00 G01R 31/12 JICST file ( JOIS)
Claims (8)
れて絶縁されたＣＶケーブル終端部の劣化診断方法にお
いて、終端接続箱内の絶縁油を抜き取ると共に再度戻す
循環路を形成し、その循環路を流れる絶縁油中の油中溶
存ガスを分離捕捉し、その捕捉した油中溶存ガスをガス
センサーを用いて監視することを特徴とするＣＶケーブ
ル終端部の劣化診断方法。1. A method for diagnosing deterioration of a terminal end of a CV cable insulated by being immersed in insulating oil contained in a terminal connection box, forming a circulation path for extracting and returning the insulating oil in the terminal connection box again, A method for diagnosing deterioration of a terminal portion of a CV cable, comprising separating and capturing dissolved gas in oil in insulating oil flowing through the circulation path, and monitoring the captured dissolved gas in oil using a gas sensor.
た油中溶存ガスがアセチレンガスであり、そのアセチレ
ンガス濃度を光式ガスセンサーを用いて計測し、その劣
化度を診断する請求項１記載のＣＶケーブル終端部の劣
化診断方法。2. The method according to claim 1, wherein the insulating oil is silicon oil, the dissolved gas in the oil produced by the deterioration is acetylene gas, and the acetylene gas concentration is measured using an optical gas sensor to diagnose the degree of deterioration. 2. The method for diagnosing deterioration of a CV cable terminal part according to item 1.
れて絶縁されたＣＶケーブル終端部の劣化診断装置にお
いて、終端接続箱内の絶縁油を抜き取ると共にこれを戻
す循環路と、その循環路に接続され、循環路中を流れる
絶縁油中から油中溶存ガスを分離捕捉する油中ガス分離
捕捉手段と、その油中ガス分離捕捉手段で捕捉された油
中溶存ガスを検出するガスセンサーとを備えたことを特
徴とするＣＶケーブル終端部の劣化診断装置。3. A circuit for diagnosing deterioration of a terminal end of a CV cable which is immersed and insulated in insulating oil contained in a terminal connection box, wherein a circulation path for extracting and returning the insulating oil in the terminal connection box is provided. A gas-in-oil separation / capturing means connected to the circulation path for separating and capturing dissolved gas in oil from the insulating oil flowing in the circulation path, and a gas for detecting the dissolved gas in oil captured by the gas-in-oil separation / capture means An apparatus for diagnosing deterioration of a terminal portion of a CV cable, comprising: a sensor.
される液相室と、その液相室とフィルタを介して接続さ
れた気相室とからなり、その気相室に光式ガスセンサー
が設けられる請求項３記載のＣＶケーブル終端部の劣化
診断装置。4. The gas-in-oil separation and capture means comprises a liquid phase chamber connected to a circulation path, and a gas phase chamber connected to the liquid phase chamber via a filter. 4. The apparatus according to claim 3, further comprising a gas sensor.
採油口と戻し口とは上下に配置され、絶縁油は油の自然
対流で循環路を流れる請求項３記載のＣＶケーブル終端
部の劣化診断装置。5. The CV cable terminal part according to claim 3, wherein the terminal connection box is horizontally disposed, the oil sampling port and the return port of the circulation path are disposed vertically, and the insulating oil flows through the circulation path by natural convection of the oil. Degradation diagnosis device.
させる請求項３記載のＣＶケーブル終端部の劣化診断装
置。6. The degradation diagnosis device for a CV cable terminal according to claim 3, wherein a circulation pump is connected to the circulation path to perform forced circulation.
り付けた請求項３記載のＣＶケーブル終端部の劣化診断
装置。7. The deterioration diagnosis device for a CV cable terminal according to claim 3, wherein a heater for generating heat convection is attached to the circulation path.
を設け、その一方を循環路の油抜き取り口に、他方を循
環路の油戻し口に接続する請求項３、４、６又は７記載
のＣＶケーブル終端部の劣化診断装置。8. An oil collecting port for insulating oil in a terminal connection box, a partition is provided, one of which is connected to an oil extracting port of the circulation path, and the other is connected to an oil return port of the circulation path. 7. The degradation diagnosis device for a CV cable terminal section according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04172196A JP3355908B2 (en) | 1996-02-28 | 1996-02-28 | Method and apparatus for diagnosing deterioration of CV cable termination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04172196A JP3355908B2 (en) | 1996-02-28 | 1996-02-28 | Method and apparatus for diagnosing deterioration of CV cable termination |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09229831A JPH09229831A (en) | 1997-09-05 |
| JP3355908B2 true JP3355908B2 (en) | 2002-12-09 |
Family
ID=12616292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04172196A Expired - Fee Related JP3355908B2 (en) | 1996-02-28 | 1996-02-28 | Method and apparatus for diagnosing deterioration of CV cable termination |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3355908B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW354646U (en) * | 1998-06-29 | 1999-03-11 | Ind Tech Res Inst | Twin tube air sampler |
| JP2008224395A (en) * | 2007-03-12 | 2008-09-25 | Chubu Electric Power Co Inc | Aerial gas analysis/diagnosis method of joint, and structure of joint |
| EP2386733A1 (en) | 2010-05-14 | 2011-11-16 | Schaller Automation Industrielle Automationstechnik GmbH & Co. KG | Assembly and method for determining the parameters of gases and/or an aerosol for a work machine |
| CN109991225A (en) * | 2017-12-30 | 2019-07-09 | 光力科技股份有限公司 | Transformer dissolved gas analysis device |
| CN110398671B (en) * | 2019-07-05 | 2021-10-29 | 深圳供电局有限公司 | Partial discharge detection device |
| CN113156288B (en) * | 2021-05-12 | 2024-04-16 | 西南交通大学 | Vehicle-mounted cable terminal partial discharge detection device and method thereof |
-
1996
- 1996-02-28 JP JP04172196A patent/JP3355908B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09229831A (en) | 1997-09-05 |
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