JP2006310199A - Switchgear - Google Patents

Switchgear Download PDF

Info

Publication number
JP2006310199A
JP2006310199A JP2005133618A JP2005133618A JP2006310199A JP 2006310199 A JP2006310199 A JP 2006310199A JP 2005133618 A JP2005133618 A JP 2005133618A JP 2005133618 A JP2005133618 A JP 2005133618A JP 2006310199 A JP2006310199 A JP 2006310199A
Authority
JP
Japan
Prior art keywords
switchgear
partial discharge
main circuit
insulating layer
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.)
Granted
Application number
JP2005133618A
Other languages
Japanese (ja)
Other versions
JP4625714B2 (en
Inventor
Junichi Sato
純一 佐藤
Kunio Yokokura
邦夫 横倉
Satoru Shioiri
哲 塩入
Satoshi Makishima
聡 槙島
Osamu Sakaguchi
修 阪口
Masaru Miyagawa
勝 宮川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP2005133618A priority Critical patent/JP4625714B2/en
Publication of JP2006310199A publication Critical patent/JP2006310199A/en
Application granted granted Critical
Publication of JP4625714B2 publication Critical patent/JP4625714B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a switchgear capable of easily detecting partial discharge. <P>SOLUTION: The switchgear is equipped with a chassis 1, main circuit members 5, 13 structuring a main circuit of the switchgear provided inside the chassis 1, and insulation layers 6, 14 molded and formed around the main circuit members 5, 13. The insulation layers 6, 14 are transparent. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、電源系統を構成する真空バルブや接続導体のような主回路部材をエポキシ樹脂のような絶縁材料でモールドしたスイッチギヤの部分放電の検出に関する。   The present invention relates to detection of partial discharge of a switchgear in which main circuit members such as vacuum valves and connection conductors constituting a power supply system are molded with an insulating material such as epoxy resin.

従来、スイッチギヤの主回路を構成する真空バルブや接続導体のような電気機器においては、全体形状を縮小するため、エポキシ樹脂のような絶縁材料によりモールドして絶縁外皮を形成した固体絶縁式のものが知られている（例えば、特許文献１参照。）。   Conventionally, in an electrical device such as a vacuum valve and a connecting conductor constituting a main circuit of a switchgear, a solid insulation type in which an insulation shell is formed by molding with an insulating material such as an epoxy resin in order to reduce the overall shape. The thing is known (for example, refer patent document 1).

また、ガス絶縁式のスイッチギヤに用いられる絶縁物においては、その表面に透明な保護層を設け、分解生成物が発生したときに絶縁特性の低下を防ぐ技術が知られている（例えば、特許文献２参照。）。   In addition, in an insulator used for a gas-insulated switchgear, a technique is known in which a transparent protective layer is provided on the surface of the insulator to prevent deterioration of insulation characteristics when decomposition products are generated (for example, patents). Reference 2).

一方、このような絶縁物を使用したスイッチギヤにおいては、絶縁劣化状態を監視するため、絶縁破壊の前駆現象として知られている部分放電を検出し、予防保全、余寿命診断が行われている。部分放電を検出する手法としては、部分放電により発生する音、電流、電磁波、光などの信号を検出するＡＥセンサ、ＣＴセンサなどの部分放電検出装置が用いられている（例えば、特許文献３参照。）。
特開２００１−２８６０１８号公報 （第４ページ、図３） 特開平８−２３７８２７号公報 （第５ページ、図１） 特開２００２−９０４１３号公報 （第４ページ、図１） On the other hand, in the switchgear using such an insulator, in order to monitor the insulation deterioration state, a partial discharge known as a precursor phenomenon of dielectric breakdown is detected, and preventive maintenance and remaining life diagnosis are performed. . As a method for detecting the partial discharge, a partial discharge detection device such as an AE sensor or a CT sensor that detects signals such as sound, current, electromagnetic waves, and light generated by the partial discharge is used (for example, see Patent Document 3). .)
JP 2001-286018 A (4th page, FIG. 3) JP-A-8-237827 (5th page, FIG. 1) JP 2002-90413 A (Page 4, FIG. 1)

上記の従来のスイッチギヤにおける部分放電の検出においては、次のような問題がある。   The detection of the partial discharge in the conventional switchgear described above has the following problems.

部分放電による音、電流、電磁波、光などの信号が微弱であり、ノイズなどの外部環境に大きく影響され、部分放電の検出が困難であった。また、絶縁劣化に大きく影響する部分放電は、絶縁物内部から発生するものが多いものの、一般的な絶縁材料のエポキシ樹脂がチョコレート色などに着色されていることから、絶縁物内部を観測することが困難であった。これは、絶縁物表面に透明な保護層を設けたものにおいても同様であり、保護層内部での部分放電の観測はできるものの、絶縁層内部での観測は困難であった。   Signals such as sound, current, electromagnetic waves, and light due to partial discharge are weak and greatly affected by the external environment such as noise, making it difficult to detect partial discharge. In addition, although partial discharges that greatly affect insulation deterioration are often generated from inside the insulator, the inside of the insulator should be observed because the epoxy resin, a common insulating material, is colored chocolate. It was difficult. The same applies to the case where a transparent protective layer is provided on the surface of the insulator, and although partial discharge can be observed inside the protective layer, observation inside the insulating layer is difficult.

このため、ノイズなどの外部環境に影響され難く、絶縁層内部で発生する部分放電を容易に検出できるようなスイッチギヤが望まれていた。   For this reason, there has been a demand for a switchgear that is not easily affected by an external environment such as noise and that can easily detect a partial discharge generated inside the insulating layer.

本発明は上記問題を解決するためになされたもので、部分放電を容易に検出し得るスイッチギヤを提供することを目的とする。   The present invention has been made to solve the above problems, and an object of the present invention is to provide a switchgear that can easily detect a partial discharge.

上記目的を達成するために、本発明のスイッチギヤは、箱体と、前記箱体内に設けられたスイッチギヤの主回路を構成する主回路部材と、前記主回路部材の周りにモールドして形成された絶縁層とを具備し、前記絶縁層は、透明であることを特徴とする。   To achieve the above object, the switchgear of the present invention is formed by molding a box, a main circuit member constituting a main circuit of the switchgear provided in the box, and the main circuit member. The insulating layer is transparent, and the insulating layer is transparent.

本発明によれば、スイッチギヤを構成する主回路部材を透明な絶縁材料でモールドして絶縁層を形成しているので、絶縁層内で発生する部分放電による光を外部から容易に観測することができ、絶縁劣化診断を行うことができる。   According to the present invention, the main circuit member constituting the switchgear is molded with a transparent insulating material to form the insulating layer, so that light due to partial discharge generated in the insulating layer can be easily observed from the outside. Insulation deterioration diagnosis can be performed.

以下、図面を参照して本発明の実施例を説明する。   Embodiments of the present invention will be described below with reference to the drawings.

先ず、本発明の実施例１に係るスイッチギヤを図１を参照して説明する。図１は、本発明の実施例１に係るスイッチギヤの構成を示す断面図である。   First, a switchgear according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a cross-sectional view illustrating a configuration of a switch gear according to a first embodiment of the present invention.

図１に示すように、スイッチギヤは、箱体１内が背面側のケーブル部１ａ、中央部の開閉部１ｂ、正面側の母線部１ｃに分かれて構成されている。   As shown in FIG. 1, the switchgear is configured by dividing the inside of the box 1 into a cable part 1a on the back side, an opening / closing part 1b in the center part, and a bus bar part 1c on the front side.

ケーブル部１ａには、ケーブルヘッド２が設けられ、ケーブルヘッド２に変流器３を貫通した電力用ケーブル４が接続されている。   A cable head 2 is provided in the cable portion 1 a, and a power cable 4 penetrating the current transformer 3 is connected to the cable head 2.

開閉部１ｂには、接離自在の一対の接点を有する真空バルブ５の周りに絶縁材料をモールドして絶縁層６を形成させた遮断部７が設けられている。この遮断部７の一方の主回路端は、コ字状の接続導体８でケーブルヘッド２に接続されている。また、他方の主回路端は、後述する母線部１ｃとの接続を行う連結導体９を絶縁層内に埋め込んだ可動導体部１０の一方に接続されている。   The opening / closing portion 1b is provided with a blocking portion 7 in which an insulating material 6 is formed by molding an insulating material around a vacuum valve 5 having a pair of contactable and separable contacts. One main circuit end of the blocking portion 7 is connected to the cable head 2 by a U-shaped connection conductor 8. The other main circuit end is connected to one of the movable conductors 10 in which a connecting conductor 9 for connecting to a bus bar 1c described later is embedded in an insulating layer.

また、可動導体部１０の開口部１０ａの一方には、絶縁操作ロッド１１が設けられている。絶縁操作ロッド１１の一方端には、連結導体９の一方を移動自在に摺動接触する真空バルブ５の可動軸が固定され、他方端には、真空バルブ５の一対の接点を開閉する電磁アクチュエータのような操作機構１２が連結されている。   An insulating operation rod 11 is provided on one side of the opening 10 a of the movable conductor portion 10. A movable shaft of the vacuum valve 5 that slidably contacts one of the connecting conductors 9 is fixed to one end of the insulating operation rod 11, and an electromagnetic actuator that opens and closes a pair of contacts of the vacuum valve 5 to the other end. The operation mechanism 12 is connected.

母線部１ｃには、遮断部７と同様に、真空バルブ１３の周りに絶縁材料をモールドして絶縁層１４を形成させた断路部１５が設けられている。断路部１５の一方の主回路端には、可動導体部１０の他方が接続されている。断路部１５の他方の主回路端には、隣接する盤との接続を行う中心導体に絶縁材料をモールドして絶縁層を形成させた母線１６が接続されている。   Similarly to the blocking portion 7, the bus bar portion 1 c is provided with a disconnecting portion 15 in which an insulating material 14 is formed by molding an insulating material around the vacuum valve 13. The other end of the movable conductor portion 10 is connected to one main circuit end of the disconnection portion 15. Connected to the other main circuit end of the disconnecting portion 15 is a bus bar 16 in which an insulating layer is formed by molding an insulating material on a central conductor for connection to an adjacent board.

また、可動導体部１０の他方の開口部１０ａには、絶縁操作ロッド１７が設けられている。絶縁操作ロッド１７の一方端には、連結導体９の他方を移動自在に摺動接触する真空バルブ１３の可動軸が固定され、他方端には、真空バルブ１３の一対の接点を開閉する開閉部１ｂの操作機構１２と同様な操作機構１８が連結されている。箱体１の正面側には、遮断部７や断路部１５などを制御する制御室１９が設けられている。   An insulating operation rod 17 is provided in the other opening 10 a of the movable conductor portion 10. A movable shaft of a vacuum valve 13 that slidably contacts the other of the connecting conductors 9 is fixed to one end of the insulating operation rod 17, and an opening / closing portion that opens and closes a pair of contacts of the vacuum valve 13 at the other end. An operation mechanism 18 similar to the operation mechanism 12 of 1b is connected. On the front side of the box 1, a control chamber 19 that controls the blocking unit 7, the disconnecting unit 15, and the like is provided.

なお、遮断部７、断路部１５、接続導体８、可動導体部１０および母線１８などの電気機器の主回路端は、いずれもテーパ状に形成された界面接続部となっており、図示しない可撓性絶縁体を介して互いの主回路端が接続されている。   Note that the main circuit ends of the electrical equipment such as the blocking portion 7, the disconnecting portion 15, the connecting conductor 8, the movable conductor portion 10, and the bus 18 are all interface connecting portions formed in a tapered shape, and are not shown. The main circuit ends are connected to each other through a flexible insulator.

ここで、遮断部７、断路部１５、接続導体８、可動導体部１０および母線１８などの絶縁層６、１４は、例えば日本ペルノックス（株）社製の透明エポキシ樹脂ＮＭ−１０２Ａ／Ｂのような絶縁材料によってモールドされ、透明なものに形成されている。即ち、これらの絶縁層６、１４は、金型内に前述のような絶縁材料を充填し、加熱硬化させて得られる。このため、遮断部７、断路部１５、可動導体部１０などのスイッチギヤを構成する電気機器は、これらの絶縁層６、１４内に埋め込まれている主回路部材の真空バルブ５、１３や連結導体９などを外部から目視することができる。   Here, the insulating layers 6 and 14 such as the blocking portion 7, the disconnecting portion 15, the connection conductor 8, the movable conductor portion 10, and the bus bar 18 are made of, for example, transparent epoxy resin NM-102A / B manufactured by Nippon Pernox Corporation. It is molded with a transparent insulating material and formed into a transparent one. That is, these insulating layers 6 and 14 are obtained by filling the mold with the insulating material as described above and curing it by heating. For this reason, the electrical devices constituting the switchgear such as the blocking portion 7, the disconnecting portion 15, and the movable conductor portion 10 are connected to the vacuum valves 5 and 13 of the main circuit member embedded in these insulating layers 6 and 14, The conductor 9 etc. can be visually observed from the outside.

また、機械的強度が必要な電気機器においては、二酸化ケイ素を主成分とする透明な粒径数十μｍ以下のガラス粒子からなる充填剤を絶縁材料中に充填すれば、その充填量を調整することにより、機械的強度を向上させることができる。一般的に、充填量を増やせば機械的強度が増すものの透明度が低下するが、内部が目視できる程度まで充填量を増やすことができるものとする。   For electrical equipment that requires mechanical strength, the filling amount can be adjusted by filling the insulating material with a filler composed of transparent glass particles mainly composed of silicon dioxide and having a particle size of several tens of μm or less. As a result, the mechanical strength can be improved. Generally, if the filling amount is increased, the mechanical strength is increased, but the transparency is lowered, but the filling amount can be increased to such an extent that the inside can be visually observed.

透明度は、観測時の明るさや絶縁層６、１４自体の透過の程度などによって変化することが考えられるが、ここでは、一般的な電気室の昼間の時間帯に、スイッチギヤを構成する主回路部材が外部から目視できることを、絶縁層６、１４が透明に形成されていると定義する。   The transparency may change depending on the brightness at the time of observation, the degree of transmission of the insulating layers 6 and 14 themselves, etc., but here, the main circuit constituting the switchgear during the daytime period of a general electric room That the member is visible from the outside is defined as the insulating layers 6 and 14 being formed transparently.

このように、絶縁層６、１４を透明に形成することにより、絶縁層６、１４内で発生する部分放電による光を外部から観測できる。更には、部分放電が発生し、その後、部分放電が一旦消滅したものにおいても、その放電痕を観測することができる。即ち、絶縁層６、１４を透明にすることにより、部分放電によって発生する信号のうち、部分放電光を外部から検出することができる。また、当然のことながら、絶縁層６、１４表面での部分放電も検出することができる。   Thus, by forming the insulating layers 6 and 14 transparently, light due to partial discharge generated in the insulating layers 6 and 14 can be observed from the outside. Further, even when a partial discharge occurs and then the partial discharge once disappears, the discharge trace can be observed. That is, by making the insulating layers 6 and 14 transparent, it is possible to detect partial discharge light from the outside of signals generated by partial discharge. As a matter of course, a partial discharge on the surfaces of the insulating layers 6 and 14 can also be detected.

なお、真空バルブ５、１３においては両端のフランジ部、接続導体８においてはコ字状に曲がった曲率部の近傍において、電界が集中し易く部分放電を起こし易い。このため、電界が集中し易い絶縁層６、１４部分の透明度を向上させることにより、部分放電の観測がより容易となり好ましくなる。   In the vacuum valves 5 and 13, the electric field is likely to concentrate in the vicinity of the flange portions at both ends, and in the vicinity of the U-shaped curved portion in the connection conductor 8, and partial discharge is likely to occur. For this reason, by improving the transparency of the insulating layers 6 and 14 where the electric field tends to concentrate, partial discharge observation becomes easier and preferable.

上記実施例１のスイッチギヤによれば、スイッチギヤを構成する主回路部材の真空バルブ５、１３などを透明な絶縁層６、１４で形成しているので、絶縁層６、１４内で発生する部分放電や放電痕を外部から容易に検出でき、絶縁劣化診断をすることができる。   According to the switchgear of the first embodiment, the vacuum valves 5 and 13 and the like of the main circuit members constituting the switchgear are formed by the transparent insulating layers 6 and 14, and thus are generated in the insulating layers 6 and 14. Partial discharge and discharge trace can be easily detected from the outside, and insulation deterioration diagnosis can be performed.

次に、本発明の実施例２に係るスイッチギヤを図２を参照して説明する。図２は、本発明の実施例２に係るスイッチギヤの遮断部の構成を示す断面図である。なお、この実施例２が実施例１と異なる点は、絶縁層表面に蛍光被膜を設けたことである。図２において、実施例１と同様の構成部分においては、同一符号を付し、その詳細な説明を省略する。   Next, a switchgear according to a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view illustrating a configuration of a blocking portion of the switchgear according to the second embodiment of the present invention. This Example 2 is different from Example 1 in that a fluorescent film is provided on the surface of the insulating layer. In FIG. 2, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

図２に示すように、真空バルブ５の周りに形成させた絶縁層６の表面には、例えばハロリン酸カルシウムのような母結晶に、例えばマンガンのような賦活剤を添加した蛍光体からなる蛍光被膜２０を設けている。   As shown in FIG. 2, on the surface of the insulating layer 6 formed around the vacuum bulb 5, a fluorescent film made of a phosphor obtained by adding an activator such as manganese to a mother crystal such as calcium halophosphate. 20 is provided.

これにより、部分放電光（可視光）による電磁波が蛍光被膜２０に吸収されると、この蛍光被膜２０が発光し、微弱な部分放電光を外部から容易に観測することができる。なお、蛍光被膜２０の形成は、遮断部７に限らず、他の電気機器にも用いることができる。   Thereby, when the electromagnetic wave by the partial discharge light (visible light) is absorbed by the fluorescent coating 20, the fluorescent coating 20 emits light, and the weak partial discharge light can be easily observed from the outside. In addition, formation of the fluorescent film 20 can be used not only for the blocking part 7 but also for other electric devices.

上記実施例２のスイッチギヤによれば、実施例１による効果のほかに、部分放電による光を更に容易に観測することができる。   According to the switchgear of the second embodiment, in addition to the effects of the first embodiment, light due to partial discharge can be observed more easily.

次に、本発明の実施例３に係るスイッチギヤを図３を参照して説明する。図３は、本発明の実施例３に係るスイッチギヤの遮断部の構成を示す断面図である。なお、この実施例３が実施例１と異なる点は、絶縁層表面に感光紙を設けたことである。図３において、実施例１と同様の構成部分においては、同一符号を付し、その詳細な説明を省略する。   Next, a switchgear according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view illustrating a configuration of a blocking portion of the switchgear according to the third embodiment of the present invention. The third embodiment is different from the first embodiment in that photosensitive paper is provided on the surface of the insulating layer. In FIG. 3, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

図３に示すように、真空バルブ５の周りに形成させた絶縁層６の表面には、例えばジアゾ感光紙のようなテープ状の感光紙２１を巻き付けている。そして、点検など所定の期間毎に感光紙２１の変色を観測するようにしている。部分放電が発生していると、その光が感光紙２１に積分されて転写され、変色を起こす。   As shown in FIG. 3, a tape-shaped photosensitive paper 21 such as diazo photosensitive paper is wound around the surface of the insulating layer 6 formed around the vacuum valve 5. The discoloration of the photosensitive paper 21 is observed every predetermined period such as inspection. When partial discharge occurs, the light is integrated and transferred to the photosensitive paper 21, causing discoloration.

なお、箱体１を密閉し、箱体１内の壁面に感光紙２１を貼ってもよく、また、箱体１内に暗視カメラを設置して部分放電光を観測してもよい。箱体１の内面を黒色に塗装すれば、部分放電光を容易に観測することができる。   The box 1 may be sealed, and the photosensitive paper 21 may be attached to the wall surface of the box 1, or a night vision camera may be installed in the box 1 to observe partial discharge light. If the inner surface of the box 1 is painted black, partial discharge light can be easily observed.

これら感光紙２１や監視カメラなどを、ここでは、部分放電の光を観測する部分放電光観測手段と定義する。   These photosensitive paper 21 and monitoring camera are defined here as partial discharge light observation means for observing partial discharge light.

上記実施例３のスイッチギヤによれば、実施例１による効果のほかに、部分放電による光を更に容易に観測することができる。   According to the switchgear of the third embodiment, in addition to the effects of the first embodiment, light due to partial discharge can be observed more easily.

本発明の実施例１に係るスイッチギヤの構成を示す断面図。Sectional drawing which shows the structure of the switchgear which concerns on Example 1 of this invention. 本発明の実施例２に係るスイッチギヤの遮断部の構成を示す断面図。Sectional drawing which shows the structure of the interruption | blocking part of the switchgear which concerns on Example 2 of this invention. 本発明の実施例３に係るスイッチギヤの遮断部の構成を示す断面図。Sectional drawing which shows the structure of the interruption | blocking part of the switchgear which concerns on Example 3 of this invention.

符号の説明Explanation of symbols

１ 箱体
１ａ ケーブル部
１ｂ 開閉部
１ｃ 母線部
２ ケーブルヘッド
３ 変流器
４ 電力用ケーブル
５、１３ 真空バルブ
６、１４ 絶縁層
７ 遮断部
８ 接続導体
９ 連結導体
１０ 可動導体部
１０ａ 開口部
１１、１７ 絶縁操作ロッド
１２、１８ 操作機構
１５ 断路部
１６ 母線
１９ 制御室
２０ 蛍光被膜
２１ 感光紙 DESCRIPTION OF SYMBOLS 1 Box 1a Cable part 1b Opening / closing part 1c Bus line part 2 Cable head 3 Current transformer 4 Power cable 5, 13 Vacuum valve 6, 14 Insulating layer 7 Breaking part 8 Connection conductor 9 Connection conductor 10 Movable conductor part 10a Opening part 11 , 17 Insulating operation rods 12, 18 Operation mechanism 15 Disconnection portion 16 Busbar 19 Control room 20 Fluorescent coating 21 Photosensitive paper

Claims (5)

箱体と、
前記箱体内に設けられたスイッチギヤの主回路を構成する主回路部材と、
前記主回路部材の周りにモールドして形成された絶縁層とを具備し、
前記絶縁層は、透明であることを特徴とするスイッチギヤ。 Box and
A main circuit member constituting a main circuit of a switchgear provided in the box;
An insulating layer formed by molding around the main circuit member,
The switchgear is characterized in that the insulating layer is transparent. 前記絶縁層は、エポキシ樹脂にガラス粒子を充填した絶縁材料で形成されたことを特徴とする請求項１に記載のスイッチギヤ。   The switchgear according to claim 1, wherein the insulating layer is formed of an insulating material in which glass particles are filled in an epoxy resin. 前記絶縁層の表面に、蛍光被膜を設けたことを特徴とする請求項１または請求項２に記載のスイッチギヤ。   The switchgear according to claim 1 or 2, wherein a fluorescent coating is provided on a surface of the insulating layer. 前記箱体内に、部分放電光を観測する部分放電光観測手段を設けたことを特徴とする請求項１乃至請求項３のいずれか１項に記載のスイッチギヤ。   The switchgear according to any one of claims 1 to 3, wherein partial discharge light observation means for observing partial discharge light is provided in the box. 前記部分放電光監視手段は、感光紙であることを特徴とする請求項４に記載のスイッチギヤ。   The switchgear according to claim 4, wherein the partial discharge light monitoring means is photosensitive paper.
JP2005133618A 2005-04-28 2005-04-28 Switchgear Expired - Fee Related JP4625714B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005133618A JP4625714B2 (en) 2005-04-28 2005-04-28 Switchgear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005133618A JP4625714B2 (en) 2005-04-28 2005-04-28 Switchgear

Publications (2)

Publication Number Publication Date
JP2006310199A true JP2006310199A (en) 2006-11-09
JP4625714B2 JP4625714B2 (en) 2011-02-02

Family

ID=37476848

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005133618A Expired - Fee Related JP4625714B2 (en) 2005-04-28 2005-04-28 Switchgear

Country Status (1)

Country Link
JP (1) JP4625714B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010093956A (en) * 2008-10-08 2010-04-22 Toshiba Corp Solid insulation switchgear with enhanced insulation reliability

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55162821A (en) * 1979-06-04 1980-12-18 Mitsubishi Electric Corp Electric device malfuction detector
JPH02158028A (en) * 1988-12-09 1990-06-18 Meidensha Corp Vacuum reduction detecting device for vacuum interrupter
JPH05222165A (en) * 1992-02-13 1993-08-31 Shin Etsu Chem Co Ltd Light-transmitting epoxy resin composition and optical semiconductor device
JP2003109447A (en) * 2001-09-28 2003-04-11 Toshiba Corp Polymer insulating tube and transformation device using the same
JP2003274518A (en) * 2002-03-19 2003-09-26 Meidensha Corp Distribution board
JP2004269754A (en) * 2003-03-10 2004-09-30 Sumitomo Bakelite Co Ltd Epoxy resin composition for optical semiconductor sealing, and optical semiconductor device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55162821A (en) * 1979-06-04 1980-12-18 Mitsubishi Electric Corp Electric device malfuction detector
JPH02158028A (en) * 1988-12-09 1990-06-18 Meidensha Corp Vacuum reduction detecting device for vacuum interrupter
JPH05222165A (en) * 1992-02-13 1993-08-31 Shin Etsu Chem Co Ltd Light-transmitting epoxy resin composition and optical semiconductor device
JP2003109447A (en) * 2001-09-28 2003-04-11 Toshiba Corp Polymer insulating tube and transformation device using the same
JP2003274518A (en) * 2002-03-19 2003-09-26 Meidensha Corp Distribution board
JP2004269754A (en) * 2003-03-10 2004-09-30 Sumitomo Bakelite Co Ltd Epoxy resin composition for optical semiconductor sealing, and optical semiconductor device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010093956A (en) * 2008-10-08 2010-04-22 Toshiba Corp Solid insulation switchgear with enhanced insulation reliability

Also Published As

Publication number Publication date
JP4625714B2 (en) 2011-02-02

Similar Documents

Publication Publication Date Title
ES2307055T3 (en) DISPLAYED ENCAPSULATED VACUUM SWITCH.
US7579571B2 (en) Visible open indicator
CN203367139U (en) Proximity switch and proximity switch assembly
CA2747506C (en) Visible open for switchgear assembly
KR100884767B1 (en) Three-phase voltage/current transformer for metering power supply
US7989726B2 (en) Electrical device containing insulating gas under pressure and including a composite insulator provided with a window for observing contacts
CN102761071B (en) Switching device assembly
WO2015022171A1 (en) Subsea fuse
CN106128850A (en) A kind of outdoor high-voltage pole or automatic circuit
EP3428934A1 (en) High voltage bushing with temperature sensor
EP2079089B1 (en) Vacuum switchgear and a method of diagnosing vacuum pressure thereof
JP4625714B2 (en) Switchgear
US9766641B2 (en) On-load tap changer for dry transformers and dry transformer
CN202058874U (en) Cable joint
CA2501143C (en) Connecting sleeve for a bus bar connection in a gas-insulated switchboard system
EP2549502A1 (en) Generator breaker with SAW sensor
JP2010087045A (en) Transformer for gas insulated meter
CN110086113B (en) Cable subsection overhauling device for humid environment
CN104106189A (en) Gas insulated switchgear and gas insulated busbar
RU2488183C2 (en) Device for monitoring of high electric field in synthetic insulating material, in particular for current input through wall
CN210182903U (en) Normal-pressure sealed shielding type solid insulation switch cabinet and switch equipment
KR100697953B1 (en) Gas circuit breaker of gas insulated switchgear
EP3163685B1 (en) Protective cover and electrical connector having a radiation window formed by a plurality of radiation passages
US20190326705A1 (en) Isolated wire rod waterproof structure and electric device provided with same
CN114175431A (en) Connection structure with UHF antenna for gas-insulated switchgear

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080418

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100723

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100803

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100922

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20101012

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20101108

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131112

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees