JP3120106B2 - Electromagnetic shield structure for very large space - Google Patents
Electromagnetic shield structure for very large spaceInfo
- Publication number
- JP3120106B2 JP3120106B2 JP08171059A JP17105996A JP3120106B2 JP 3120106 B2 JP3120106 B2 JP 3120106B2 JP 08171059 A JP08171059 A JP 08171059A JP 17105996 A JP17105996 A JP 17105996A JP 3120106 B2 JP3120106 B2 JP 3120106B2
- Authority
- JP
- Japan
- Prior art keywords
- shield layer
- primary
- electromagnetic
- scale space
- plate
- 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
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電力ケーブルの検
査を行う超高電圧検査棟などの超大規模空間の電磁シー
ルド構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic shield structure for an ultra-large space such as an ultra-high voltage inspection building for inspecting a power cable.
【０００２】[0002]
【従来の技術】近年、オフィスのＯＡ化、夏期の冷房電
力の増加等で社会の電力需要は増加の一途をたどってお
り、電力会社では送電地の電圧を高くし、送電ロスを低
減することが検討されており、これがために超高電圧ケ
ーブル類の各種試験、測定を行う超大規模空間の施設が
必要とされる。2. Description of the Related Art In recent years, the demand for electricity in society has been steadily increasing due to office automation (OA), cooling power in summer, etc., and electric power companies have to increase the voltage at the power transmission area and reduce the power transmission loss. Therefore, an ultra-large-scale facility for performing various tests and measurements on ultra-high-voltage cables is required.
【０００３】そして、このような施設では１ＭＨZ で70
dB程度の電磁シールド性能が要求されるが、従来大規模
空間のおいては実績が少ない。[0003] and, in such a facility in the 1MH Z 70
Electromagnetic shielding performance on the order of dB is required, but it has been rarely used in large-scale spaces.
【０００４】小規模建物においては、従来、部屋および
建物の天井、壁および床の表面に導電性材料を塗被した
り、金属箔や金属板によるシールド層を付設することで
対処していたがこれでは前記電磁シールド性能を満たす
ことが難しい。Conventionally, in small-scale buildings, measures have been taken by coating a conductive material on the surfaces of ceilings, walls and floors of rooms and buildings, or by providing a shielding layer of metal foil or metal plate. This makes it difficult to satisfy the electromagnetic shielding performance.
【０００５】このような電磁シールド性能を満たすに
は、１次シールド層と２次シールド層との二重の電磁シ
ールドとすることが望ましいが、その一例としては１次
シールド層はＲＣ躯体の鉄筋を使用して形成し、２次シ
ールド層は天井の鋼板等を溶接や半田接合で接続して構
成する。[0005] In order to satisfy such electromagnetic shielding performance, it is desirable to use a double electromagnetic shield composed of a primary shield layer and a secondary shield layer. And the secondary shield layer is formed by connecting a steel plate or the like on the ceiling by welding or soldering.
【０００６】図14は他の例を示すもので、１次シールド
層を形成する１次遮蔽材としてはＵ型デッキプレート１
を使用し、これを壁から立ち上ってきた１次遮蔽材と電
気溶接にて接続した。また、２次シールド層を形成する
２次遮蔽材としては角波鉄板２を使用し、これを一山重
ねて適宜ピッチで半田付けで電気的に接合した。FIG. 14 shows another example, in which a U-shaped deck plate 1 is used as a primary shielding material for forming a primary shielding layer.
This was connected to the primary shielding material rising from the wall by electric welding. In addition, a square wave iron plate 2 was used as a secondary shielding material for forming a secondary shield layer, and this was piled up and electrically connected by soldering at an appropriate pitch.
【０００７】[0007]
【発明が解決しようとする課題】前記従来の二重の電磁
シールドを構成する方法では、鉄筋で１次シールド層を
形成するには各接合箇所を溶接するのでその数が膨大
で、コストが高く、作業時間が膨大なものとなる。さら
に、施工箇所の品質確認も困難である。In the conventional method of forming a double electromagnetic shield, since the joints are welded to form the primary shield layer with the reinforcing steel, the number of joints is enormous and the cost is high. , Work time becomes enormous. Furthermore, it is difficult to check the quality of the construction site.
【０００８】２次シールド層においても鋼板同士を半田
接合するので、その作業が膨大で、同様にコスト、作業
時間が多大なものになる。特に、天井面の上向きの半田
作業には相当の専門技術が必要である。In the secondary shield layer, since the steel sheets are joined by soldering, the operation is enormous, and the cost and the operation time are similarly increased. In particular, the upward soldering work on the ceiling surface requires considerable expertise.
【０００９】図14の場合でも１次シールド層の１次遮蔽
材としてのデッキプレート１は同様に端部を重ね合わせ
て電気溶接で接続するので、作業量が多く、コスト高で
あり、２次シールド層では２次遮蔽材としての角波鉄板
２も半田付けで電気的に接合するので同様である。Even in the case of FIG. 14, the deck plate 1 as the primary shielding material of the primary shielding layer is similarly overlapped at the ends and connected by electric welding, so that the work amount is large, the cost is high, and the secondary In the shield layer, the square wave iron plate 2 as a secondary shielding material is also electrically connected by soldering, so that the same is true.
【００１０】本発明の目的は前記の従来例の不都合を解
消し、超大規模空間の遮蔽として１次シールド層と２次
シールド層との二重の電磁シールドを設ける場合におい
て、施工が簡単で、しかも確実に接続ができ、施工箇所
の品質の信頼性も高く、コスト面でも合理化が図れる超
大規模空間の電磁シールド構造を提供することにある。An object of the present invention is to solve the above-mentioned disadvantages of the conventional example, and to provide a double electromagnetic shield of a primary shield layer and a secondary shield layer as a shield for a very large-scale space. In addition, it is an object of the present invention to provide an electromagnetic shielding structure for an ultra-large-scale space that can be reliably connected, has high reliability in the quality of the construction site, and can be rationalized in terms of cost.
【００１１】[0011]
【課題を解決するための手段】本発明は前記目的を達成
するため、第１に、１次シールド層としては長尺折版の
屋根材を２重葺としたこと、第２に、建屋鉄骨は１次シ
ールド層と電気的に一体化して、１次シールド層の一部
とみなすこと、第３に、２次シールド層として亜鉛メッ
キ鋼板による角波鉄板を天井板として使用し、この角波
鉄板相互はソケット方式のヒゲ付き銅線で接続するこ
と、第４に、角波鉄板取付け用のフレームは建屋鉄骨に
絶縁用ワッシャー、絶縁ボルト等の絶縁部材を介して接
続し、１次シールド層と２次シールド層とは電気的に絶
縁すること、第５に、ヒゲ付き銅線で接続する角波鉄板
による天井板は、パネル化し、このパネル相互もソケッ
ト端子で接続することを要旨とするものである。According to the present invention, in order to achieve the above object, first, a long folded roof material having a double roof is used as a primary shield layer. Is electrically integrated with the primary shield layer and regarded as a part of the primary shield layer. Third, a square wave iron plate made of galvanized steel plate is used as a ceiling plate as a secondary shield layer, Fourth, iron plates must be connected by socket-type copper wire with whiskers. Fourth, the frame for mounting square wave iron plates is connected to the building steel frame through insulating members such as insulating washers and insulating bolts. Fifth, the ceiling plate made of square-wave iron plates connected by copper wires with whiskers is made into a panel, and these panels are also connected with socket terminals. Things.
【００１２】請求項１記載の本発明によれば、１次シー
ルド層としては長尺折版の屋根材を２重葺としたので、
折版の重ね部分は溶接や半田付けなしでもシールド性能
を向上させることができる。According to the first aspect of the present invention, as the primary shield layer, the long folded roof material is double-roofed.
The overlapping portion of the folded plate can improve the shielding performance without welding or soldering.
【００１３】請求項２記載の本発明によれば、前記作用
に加えて、鉄筋コンクリート造でなく鉄骨造の場合で
も、建屋鉄骨を１次シールド層と電気的に一体化して、
１次シールド層の一部とみなすことによりシールド材料
として有効に利用できる。According to the second aspect of the present invention, in addition to the above function, even in the case of a steel frame rather than a reinforced concrete structure, the building steel frame is electrically integrated with the primary shield layer,
By considering it as a part of the primary shield layer, it can be effectively used as a shield material.
【００１４】請求項３記載の本発明によれば、２次シー
ルド層としての角波鉄板相互もソケット方式のヒゲ付き
銅線で接続することにより現場で確実にかつ簡単に接続
することができる。According to the third aspect of the present invention, the square wave iron plates as the secondary shield layers can be reliably and easily connected on the spot by connecting them with a socket type copper wire with a whisker.
【００１５】請求項４記載の本発明によれば、角波鉄板
取付け用のフレームは建屋鉄骨に絶縁用ワッシャー、絶
縁ボルト等の絶縁部材を介して接続することで、１次シ
ールド層と２次シールド層とを電気的に絶縁することに
より、二重の電磁シールドを確実に形成することができ
る。According to the present invention, the frame for mounting the square wave iron plate is connected to the building steel frame via an insulating member such as an insulating washer and an insulating bolt, so that the primary shield layer and the secondary shield layer are connected to each other. By electrically insulating the shield layer from the shield layer, a double electromagnetic shield can be reliably formed.
【００１６】請求項５記載の本発明によれば、ヒゲ付き
銅線で接続する角波鉄板による天井板はパネル化するこ
とで施工のより合理化を図れるとともに、パネル相互の
接続もソケット端子にてワンタッチ方式にて容易に、し
かも確実に接続できる。According to the fifth aspect of the present invention, the ceiling plate made of square-wave iron plates connected by copper wires with whiskers can be panelized to make the construction more rational, and the connection between the panels can be made by socket terminals. Easy and reliable connection with one-touch method.
【００１７】[0017]
【発明の実施の形態】以下、図面について本発明の実施
の形態を詳細に説明する。図１は本発明の超大規模空間
の電磁シールド構造の１実施形態を示す要部の縦断正面
図、図２は同上全体の縦断正面図、図３は天井伏せ図で
ある。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a vertical sectional front view of an essential part showing an embodiment of an electromagnetic shielding structure for a super-large-scale space according to the present invention, FIG. 2 is a vertical sectional front view of the whole of the same, and FIG.
【００１８】図中３は屋根、４は天井を示すが、本発明
は１次シールド層としてはこの屋根３を構成する屋根材
に0.8m/mの長尺折版５を使用し、これを図４に示すよう
な２重葺とする。このような２重葺とすることで長尺折
版５の重ね部分のシールド性能を向上させるものであ
る。In the figure, reference numeral 3 denotes a roof, and 4 denotes a ceiling. In the present invention, a long folding plate 5 of 0.8 m / m is used as a primary shield layer for the roof material constituting the roof 3, and A double roof is used as shown in FIG. With such a double roof, the shielding performance of the overlapping portion of the long folded plate 5 is improved.
【００１９】さらに建物としては鉄骨造であり、建屋鉄
骨６は前記１次シールド層をなす長尺折版５による屋根
材とは電気的に一体化することで１次シールド層の一部
とみなすものとした。Further, the building is made of a steel frame, and the building steel frame 6 is regarded as a part of the primary shield layer by being electrically integrated with the roof material of the long folded plate 5 forming the primary shield layer. It was taken.
【００２０】一方、２次シールド層として図５に示すよ
うに亜鉛メッキ鋼板による0.6t程度の角波鉄板７を天井
板として使用し、この角波鉄板７の端部相互は図６、図
７に示すように端子をソケット９での接合としたソケッ
ト方式のヒゲ付き銅線８で接続ピッチ300 程度に接続す
る。On the other hand, as shown in FIG. 5, a square wave iron plate 7 of about 0.6 t made of galvanized steel plate is used as a ceiling plate as a secondary shield layer, and the ends of the square wave iron plate 7 are mutually connected as shown in FIGS. As shown in FIG. 5, terminals are connected at a connection pitch of about 300 by a socket-type copper wire 8 with a socket which is joined by a socket 9.
【００２１】また、このようなヒゲ付き銅線８で接続す
る角波鉄板７による天井板はパネル10としてパネル化
し、図８〜図10に示すようにこのパネル10の相互もソケ
ット９の端子で接続する。The ceiling plate formed by the square-wave iron plate 7 connected with the copper wire 8 with a whisker is formed into a panel 10 as a panel. As shown in FIGS. Connecting.
【００２２】ところで、１次シールド層と２次シールド
層とは電気的に絶縁することで二重の電磁シールドを確
実に形成する必要がある。これがために、本発明は図11
〜図13に示すように建屋鉄骨６を構成する下弦材６ａと
前記パネル10を構成する角波鉄板７取り付け用のフレー
ムとはブラケット11，11′の部分を絶縁ボルトとしての
絶縁管12と絶縁用ワッシャーであるベークライトワッシ
ャー13とで結合した。Incidentally, it is necessary to reliably form a double electromagnetic shield by electrically insulating the primary shield layer and the secondary shield layer. Because of this, the present invention
As shown in FIG. 13, the lower chord 6a constituting the building steel frame 6 and the frame for mounting the square wave iron plate 7 constituting the panel 10 are insulated from the insulating tube 12 as an insulating bolt at the brackets 11, 11 '. And a bakelite washer 13 serving as a washer.
【００２３】なお、前記天井板をパネル10として構成す
ることは、このような１次シールド層と２次シールド層
とを電気的に絶縁するのに取り付け箇所を最小限とする
ことができるものであり、パネル10相互の接続もソケッ
ト９の端子でワンタッチ式に容易にかつ確実に接続でき
る。The construction of the ceiling panel as the panel 10 can minimize the number of attachment points for electrically insulating such a primary shield layer and a secondary shield layer. In addition, the connection between the panels 10 can be easily and reliably made in a one-touch manner with the terminals of the socket 9.
【００２４】[0024]
【発明の効果】以上述べたように本発明の超大規模空間
の電磁シールド構造は、超大規模空間の遮蔽として特に
屋根と天井部に１次シールド層と２次シールド層との二
重の電磁シールドを設ける場合において、施工が簡単
で、しかも確実に接続ができ、施工箇所の品質の信頼性
も高く、コスト面でも合理化が図れるものである。As described above, the electromagnetic shielding structure for a super-large-scale space according to the present invention is a double electromagnetic shield comprising a primary shield layer and a secondary shield layer particularly for a roof and a ceiling as a shield for a super-large-scale space. In this case, the construction is simple and the connection can be made securely, the reliability of the quality of the construction site is high, and the cost can be rationalized.
【図１】本発明の超大規模空間の電磁シールド構造の１
実施形態を示す要部の縦断正面図である。FIG. 1 shows an electromagnetic shielding structure for a very large-scale space according to the present invention.
It is a longitudinal section front view of an important section showing an embodiment.
【図２】本発明の超大規模空間の電磁シールド構造の１
実施形態を示す全体の縦断正面FIG. 2 shows an electromagnetic shielding structure of a super-large-scale space according to the present invention.
Overall longitudinal front showing the embodiment
【図３】本発明の超大規模空間の電磁シールド構造の１
実施形態を示す天井伏せ図である。FIG. 3 shows an electromagnetic shielding structure for a very large-scale space according to the present invention.
It is a ceiling prone figure which shows embodiment.
【図４】屋根の縦断側面図である。FIG. 4 is a longitudinal sectional side view of a roof.
【図５】天井の縦断側面図である。FIG. 5 is a vertical sectional side view of a ceiling.
【図６】天井板の接続部の側面図である。FIG. 6 is a side view of a connection portion of the ceiling plate.
【図７】天井板の接続部の平面図である。FIG. 7 is a plan view of a connection portion of the ceiling plate.
【図８】天井でのパネル相互の接続の平面図である。FIG. 8 is a plan view of connection between panels on a ceiling.
【図９】図８のイ線矢視図である。FIG. 9 is a view on arrow A in FIG. 8;
【図１０】図８のロ線矢視図である。FIG. 10 is a view taken along the arrow B in FIG.
【図１１】建屋鉄骨への天井板の取り付け部の正面図で
ある。FIG. 11 is a front view of an attachment portion of a ceiling plate to a building steel frame.
【図１２】建屋鉄骨への天井板の取り付け部の側面図で
ある。FIG. 12 is a side view of a mounting portion of a ceiling plate to a building steel frame.
【図１３】図12のハ−ハ線矢視図である。FIG. 13 is a view taken on line C-A of FIG. 12;
【図１４】従来例の縦断側面図である。FIG. 14 is a longitudinal sectional side view of a conventional example.
１…デッキプレート ２…角波鉄板 ３…屋根 ４…天井 ５…長尺折版 ６…建屋鉄骨 ６ａ…下弦材 ７…角波鉄板 ８…ヒゲ付き銅線 ９…ソケット 10…パネル 11,11 ′…ブラケット 12…絶縁管 13…ベークライトワッ
シャーDESCRIPTION OF SYMBOLS 1 ... Deck plate 2 ... Square wave iron plate 3 ... Roof 4 ... Ceiling 5 ... Long folded plate 6 ... Building steel frame 6a ... Lower chord material 7 ... Square wave iron plate 8 ... Copper wire with a beard 9 ... Socket 10 ... Panel 11, 11 ' ... Bracket 12 ... Insulation tube 13 ... Bakelite washer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐藤 義清 大阪府大阪市西区阿波座一丁目３番５号 鹿島建設株式会社 関西支店内 (72)発明者 山本 康夫 大阪府大阪市西区阿波座一丁目３番５号 鹿島建設株式会社 関西支店内 (72)発明者 田中 正昭 大阪府大阪市西区阿波座一丁目３番５号 鹿島建設株式会社 関西支店内 (72)発明者 羽馬 覚 大阪府大阪市西区阿波座一丁目３番５号 鹿島建設株式会社 関西支店内 (72)発明者 石本 博 大阪府大阪市此花区島屋一丁目１番３号 住友電気工業株式会社 大阪製作所内 (72)発明者 井上 力 大阪府大阪市此花区島屋一丁目１番３号 住友電気工業株式会社 大阪製作所内 (72)発明者 藤村 修三 大阪府大阪市此花区島屋一丁目１番３号 住友電気工業株式会社 大阪製作所内 (56)参考文献 特開 平１−203544（ＪＰ，Ａ) 特開 昭59−4000（ＪＰ，Ａ) 特開 昭48−94233（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) E04H 9/14 H05K 9/00 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshikiyo Sato 1-3-5 Awaza, Nishi-ku, Osaka-shi, Osaka Kashima Construction Co., Ltd. Kansai Branch (72) Inventor Yasuo Yamamoto 1-3-3 Awaza, Nishi-ku, Osaka-shi, Osaka No.5 Kashima Construction Co., Ltd.Kansai Branch (72) Inventor Masaaki Tanaka 1-3-5 Awaza, Nishi-ku, Osaka-shi, Osaka Prefecture Kashima Construction Co., Ltd.Kansai Branch (72) Inventor Satoru Hama, Aichi Awaza, Nishi-ku, Osaka-shi, Osaka 3-5-5 Kashima Construction Co., Ltd.Kansai Branch (72) Inventor Hiroshi Ishimoto 1-3-1 Shimaya, Konohana-ku, Osaka-shi, Osaka Sumitomo Electric Industries, Ltd. Osaka Works (72) Inventor Riki Inoue Osaka, Osaka 1-3-3 Shimaya, Konohana-ku, Osaka Sumitomo Electric Industries, Ltd. Osaka Works (72) Inventor Shuzo Fujimura Konohana-ku, Osaka, Osaka No. 1-3, Ya-chome Sumitomo Electric Industries, Ltd. Osaka Works (56) References JP-A-1-203544 (JP, A) JP-A-59-4000 (JP, A) JP-A-48-9233 (JP) , A) (58) Fields investigated (Int. Cl. 7 , DB name) E04H 9/14 H05K 9/00
Claims (5)
層と２次シールド層との二重の電磁シールドを設ける場
合において、１次シールド層としては長尺折版の屋根材
を２重葺としたことを特徴とする超大規模空間の電磁シ
ールド構造。When a double electromagnetic shield of a primary shield layer and a secondary shield layer is provided as a shield for an ultra-large-scale space, a long folded roof material and a double roof are used as the primary shield layer. An electromagnetic shielding structure for a very large-scale space characterized by the following.
体化して、１次シールド層の一部とみなす請求項１記載
の超大規模空間の電磁シールド構造。2. The electromagnetic shielding structure according to claim 1, wherein the building steel frame is electrically integrated with the primary shield layer and is regarded as a part of the primary shield layer.
よる角波鉄板を天井板として使用し、この角波鉄板相互
はソケット方式のヒゲ付き銅線で接続する請求項１また
は請求項２記載の超大規模空間の電磁シールド構造。3. The super-sized large-sized iron plate according to claim 1, wherein a square-wave iron plate made of a galvanized steel plate is used as a ceiling plate as the secondary shield layer, and the square-wave iron plates are connected to each other by a copper wire with a socket type. Electromagnetic shield structure in a large space.
に絶縁用ワッシャー、絶縁ボルト等の絶縁部材を介して
接続し、１次シールド層と２次シールド層とは電気的に
絶縁する請求項１ないし請求項３のいずれかに記載の超
大規模空間の電磁シールド構造。4. A square wave iron plate mounting frame is connected to a building steel frame via an insulating member such as an insulating washer and an insulating bolt, and the primary shield layer and the secondary shield layer are electrically insulated. An electromagnetic shielding structure for an ultra-large-scale space according to any one of claims 1 to 3.
天井板はパネル化し、このパネル相互もソケット端子で
接続する請求項１ないし請求項４のいずれかに記載の超
大規模空間の電磁シールド構造。5. The electromagnetic shield for an ultra-large-scale space according to claim 1, wherein the ceiling plate made of a square wave iron plate connected by a copper wire with a beard is formed into a panel, and the panels are connected to each other by a socket terminal. Construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08171059A JP3120106B2 (en) | 1996-07-01 | 1996-07-01 | Electromagnetic shield structure for very large space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08171059A JP3120106B2 (en) | 1996-07-01 | 1996-07-01 | Electromagnetic shield structure for very large space |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1018646A JPH1018646A (en) | 1998-01-20 |
| JP3120106B2 true JP3120106B2 (en) | 2000-12-25 |
Family
ID=15916311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08171059A Expired - Fee Related JP3120106B2 (en) | 1996-07-01 | 1996-07-01 | Electromagnetic shield structure for very large space |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3120106B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4032723B2 (en) * | 2001-12-06 | 2008-01-16 | 松下電器産業株式会社 | Air conditioner |
-
1996
- 1996-07-01 JP JP08171059A patent/JP3120106B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1018646A (en) | 1998-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021082474A1 (en) | Photovoltaic tile piercing device, photovoltaic tile installation structure, and photovoltaic power generation system | |
| JP3120106B2 (en) | Electromagnetic shield structure for very large space | |
| JP4916588B1 (en) | Solar power generation panel device | |
| JP3155981B2 (en) | Electromagnetic shield structure for very large space | |
| US3489846A (en) | Busway joint cover with expansion accommodating means | |
| JP3155982B2 (en) | Electromagnetic shield structure for very large space | |
| US4361719A (en) | Earthing systems | |
| CN105429034A (en) | Grounding device of transformer substation containing inlet and outlet cables and mounting method thereof | |
| KR101169384B1 (en) | Gas insulated switchgear | |
| CN211508491U (en) | Novel bridge multidirectional collection point component | |
| JP2575894Y2 (en) | Electrical insulation reinforcement structure | |
| JPH0726877Y2 (en) | Electromagnetic shield panel | |
| JP3265990B2 (en) | Electromagnetic shield shutter | |
| US3383520A (en) | Utilization of the electrical neutral with cathodic protection | |
| CN220797723U (en) | Tightening type line groove connector | |
| JPH029595Y2 (en) | ||
| RU2094575C1 (en) | Reinforced concrete support | |
| CN221150901U (en) | Cotton-free light spliced fire-resistant bus duct | |
| RU2792866C1 (en) | Water-insulated roof with a conductive base from heat-insulating plates and method for its installation | |
| JP3047032B2 (en) | Electromagnetic wave shield structure at ceiling / wall connection | |
| CN217354042U (en) | A whole door frame and door installation receipts limit structure for integrated wallboard | |
| JP2662091B2 (en) | Electromagnetic wave shield structure of electric cable | |
| CN213959677U (en) | Aluminum alloy bus duct capable of being connected side by side | |
| JPH0810233Y2 (en) | Electromagnetic shield panel | |
| CN217583648U (en) | Metal pipe crossover and metal pipe system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |