JPH01243319A - Lighting insulator and manufacture thereof - Google Patents
Lighting insulator and manufacture thereofInfo
- Publication number
- JPH01243319A JPH01243319A JP7241188A JP7241188A JPH01243319A JP H01243319 A JPH01243319 A JP H01243319A JP 7241188 A JP7241188 A JP 7241188A JP 7241188 A JP7241188 A JP 7241188A JP H01243319 A JPH01243319 A JP H01243319A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- insulating
- cylinder
- element unit
- limiting element
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000012212 insulator Substances 0.000 title abstract description 4
- 239000011810 insulating material Substances 0.000 claims abstract description 11
- 239000013013 elastic material Substances 0.000 claims description 20
- 239000006260 foam Substances 0.000 claims description 20
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 17
- 238000005187 foaming Methods 0.000 abstract 2
- 230000007423 decrease Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
Landscapes
- Thermistors And Varistors (AREA)
- Insulators (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
この発明は避雷碍子及びその製造方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a lightning arrester and a manufacturing method thereof.
(従来の技術)
従来の避雷碍子としては、内部に限流素子ユニットを収
容した耐圧絶縁筒の両端に一対の電極金具を嵌合固定し
、耐圧絶IRfl4及び両電極金具の外周面に絶縁外套
体をモールド形成すると共に、耐圧絶縁筒と限流素子ユ
ニットとの間に内側絶縁層を設けたものが知られている
。(Prior art) As a conventional lightning arrester, a pair of electrode fittings are fitted and fixed to both ends of a voltage-proof insulating tube that houses a current-limiting element unit inside, and an insulating jacket is attached to the outer circumferential surface of the voltage-proof insulation tube IRfl4 and both electrode fittings. It is known that the body is molded and an inner insulating layer is provided between the voltage-resistant insulating cylinder and the current limiting element unit.
〈発明が解決しようとする課題)
ところが、この従来の避雷碍子においては、耐lモ絶縁
筒と限流素子ユニットとの間に内側絶縁層となる絶縁材
を充填する際に、その絶縁材内に空気が残留すると、耐
圧絶縁筒と限流素子ユニットとの間の絶縁を低下させる
ことからこの防止を計るためのモールド型あるいは真空
引きfl[等に特別の工夫を要するという問題点があっ
た。(Problems to be Solved by the Invention) However, in this conventional lightning arrester, when filling an insulating material to serve as an inner insulating layer between the L-mo insulating tube and the current limiting element unit, the inside of the insulating material is If air remains in the tube, the insulation between the voltage-resistant insulating tube and the current-limiting element unit will be reduced, so there is a problem in that special measures are required for the mold or vacuum fl[, etc.] to prevent this. .
この発明は、このような従来の技術に存在する問題点に
着目してなされたものであって、耐圧絶R筒と限流素子
ユニットとの間の内側絶縁層に混入する空気を極小にお
さえて、耐圧絶縁筒と限流素子ユニットとの間の絶縁を
十分に確保することができる信頼性の^い避1t!!?
子を提供することを目的とするものであり、又、その避
雷碍子の製造に適した製造方法を提供することを目的と
するものである。This invention was made by paying attention to the problems existing in the conventional technology, and aims to minimize the air that gets mixed into the inner insulating layer between the pressure-resistant R cylinder and the current limiting element unit. This is a highly reliable solution that can ensure sufficient insulation between the voltage-resistant insulation cylinder and the current-limiting element unit! ! ?
The purpose of this invention is to provide a lightning arrester, and also to provide a manufacturing method suitable for manufacturing the lightning arrester.
(課題を解決するための手段)
上記の目的を達成するために、この発明の避雷碍子にお
いては、耐圧絶縁筒と、該耐圧絶縁筒の内部に収納され
た限流索子ユニットと、醋記耐圧給RWiの上下両端に
嵌合固定された電極金具と、前記耐圧絶縁筒の上下両端
部に収容されたリング状の独立発泡絶縁弾性材と、前記
耐圧絶縁筒及び電極金具の外周面にモールドされた絶縁
外套体と、耐圧絶縁筒の放圧孔から内部に充填された内
側絶縁層内
又、この発明の避雷碍子の製造方法においては、耐圧絶
縁筒の一端部に*m金具を嵌合固定し、該耐圧絶縁筒の
一端部内側にはリング状の独立発泡絶縁弾性材を収容し
、該耐圧絶縁筒の内部に限流素子ユニットを収納して、
その一端部を前記電極金具に係合し、前記耐圧絶縁筒の
他端内部にリング状の独立発泡絶縁弾性材を収容し、一
方、前記限流素子ユニットの他端部には別の電極金具を
嵌合固定し、さらに、前記耐圧絶縁筒及び両電極金具の
外周面に絶縁外套体を、限流素子ユニットと耐圧絶縁筒
との間に内側絶縁層をそれぞれ形成するために、絶縁外
套体の形成部及び限、流素子ユニットと耐圧絶縁筒との
間を真空引きにして前記両独立発泡絶縁弾性材を膨張さ
せた後に絶縁材を注入して絶縁外套体をモールド形成す
ると共に、耐圧絶縁筒に形成した放圧孔から耐圧絶縁筒
と限流素子ユニットとの間に絶縁材を注入し、tel&
E両独立発泡絶縁弾性材を圧縮するようにしたものであ
る。(Means for Solving the Problems) In order to achieve the above object, the lightning arrester of the present invention includes a voltage-resistant insulating cylinder, a current-limiting cable unit housed inside the voltage-resistant insulating cylinder, Electrode fittings fitted and fixed to the upper and lower ends of the pressure-resistant supply RWi, ring-shaped closed foam insulating elastic material accommodated in the upper and lower ends of the voltage-resistant insulation cylinder, and molded on the outer peripheral surfaces of the voltage-resistant insulation cylinder and the electrode metal fittings. In addition, in the method for manufacturing a lightning arrester insulator of the present invention, an *m metal fitting is fitted to one end of the voltage-resistant insulating cylinder. fixed, a ring-shaped closed foam insulating elastic material is housed inside one end of the pressure-resistant insulating tube, and a current-limiting element unit is housed inside the pressure-proof insulating tube,
One end thereof is engaged with the electrode fitting, and a ring-shaped closed foam insulating elastic material is housed inside the other end of the voltage-proof insulating cylinder, while another electrode fitting is attached to the other end of the current-limiting element unit. and an insulating mantle to form an insulating mantle on the outer circumferential surface of the voltage-proof insulating tube and both electrode fittings, and an inner insulating layer between the current-limiting element unit and the voltage-proof insulating tube. A vacuum is drawn between the flow element unit and the voltage-resistant insulating cylinder to expand both closed-cell foam insulating elastic materials, and then an insulating material is injected to form an insulating jacket. Insulating material is injected between the pressure-resistant insulating cylinder and the current-limiting element unit through the pressure relief hole formed in the cylinder.
E: Both closed foam insulating elastic materials are compressed.
(作用)
上記のように構成された避雷碍子及びその製造方法によ
れば、絶縁外套体及び内側絶縁層のモールド形成に際し
、耐圧絶縁筒の両端内部に収容されたリング状の独立発
泡絶縁弾性材が、真空引きに伴って体積膨張された後に
絶縁材の注入に伴って偏平状に圧縮される。そのために
、真空引き時に耐圧絶縁筒と限流素子ユニツ1−との間
に残留する空気が少なくなると共に、独立発泡絶縁弾性
材が偏平状に体積収縮されるときに残留エアが引寄せら
れて収縮部分に集約されるから、その後に充填される内
側絶縁層内への空気混入量を極小におさえることができ
る。(Function) According to the lightning arrester configured as described above and the manufacturing method thereof, when molding the insulating jacket and the inner insulating layer, the ring-shaped closed-cell foam insulating elastic material is housed inside both ends of the voltage-resistant insulating cylinder. is expanded in volume as a result of evacuation, and then compressed into a flat shape as insulating material is injected. Therefore, the amount of air remaining between the pressure-resistant insulating tube and the current-limiting element unit 1- during vacuuming is reduced, and the remaining air is attracted when the closed-cell foam insulating elastic material shrinks in volume into a flat shape. Since the air is concentrated in the contracted portion, the amount of air mixed into the inner insulating layer filled subsequently can be kept to a minimum.
(実施例)
以下、この発明の一実施例を図面に基づいて詳細に説明
する。(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.
第1図に示すように、耐圧絶縁n1は強化プラスチック
(FRP)等により上下両端を開放した円筒状に形成さ
れ、それには複数の放圧孔2が形成されている。電圧−
電流特性が非直線性の酸化亜鉛(ZnO)等を主材とす
g複数の限流素子よりなる限流素子ユニット3は耐圧絶
縁筒1の内部に収容され、ぞの上下両端には接触金具4
,5が設けられている。As shown in FIG. 1, the voltage-resistant insulation n1 is formed of reinforced plastic (FRP) or the like into a cylindrical shape with both upper and lower ends open, and a plurality of pressure relief holes 2 are formed in it. Voltage -
The current limiting element unit 3, which is mainly made of zinc oxide (ZnO) or the like with non-linear current characteristics, is housed inside the voltage-resistant insulating cylinder 1, and has contact fittings at both the upper and lower ends. 4
, 5 are provided.
一対の電極金具6,7は前記耐圧絶縁筒1の上下両端に
嵌合され、接着剤8によってそれぞれ固定されている。A pair of electrode fittings 6 and 7 are fitted to both upper and lower ends of the voltage-resistant insulating cylinder 1 and fixed with an adhesive 8, respectively.
付勢手段としてのコイルスプリング9は限流素子ユニッ
ト3のF接触金具5と下電極金具7とを電気的に接続す
るようにその両者間に介在され、このコイルスプリング
9の付勢力により限流素子ユニット3における各限流素
子間の接触圧が確保されると共に、限流素子ユニット3
の上接触金具4が上電極金具6に圧接係合されている。A coil spring 9 serving as a biasing means is interposed between the F contact fitting 5 of the current limiting element unit 3 and the lower electrode fitting 7 so as to electrically connect them. The contact pressure between each current-limiting element in the element unit 3 is ensured, and the current-limiting element unit 3
The upper contact fitting 4 is press-fitted to the upper electrode fitting 6.
一対の独立発泡絶縁弾性材10.11はEPDM(エチ
レンープE1ピレンージエン共重合体)等の独立発泡ゴ
ムによりリング状に形成され、前記耐圧絶縁筒1の上下
両端部の内側に収容されている。絶縁外套体12は前記
EPDMゴム等゛により耐圧絶縁筒1及び両l!極金具
6,7の外周面に気密性をもってモールド形成され、そ
の外周には複数のびだ13が設けられている。内側絶縁
W!114は耐圧絶縁筒1と限流素子ユニット3との間
に設けられ、前記絶縁外套体12のモールド時にEPD
Mゴム等の絶縁材が耐圧絶縁筒1の放圧孔2から内部に
充填されることにより形成されている。A pair of closed foam insulating elastic materials 10 and 11 are formed into a ring shape from closed foam rubber such as EPDM (ethylene-E1-pyrene diene copolymer), and are housed inside the upper and lower ends of the voltage-resistant insulating cylinder 1. The insulating jacket 12 is made of the above-mentioned EPDM rubber or the like and is made of the pressure-resistant insulating cylinder 1 and both l! The outer peripheral surfaces of the electrode fittings 6 and 7 are molded to be airtight, and a plurality of ribs 13 are provided on the outer peripheries. Inner insulation W! Reference numeral 114 is provided between the voltage-resistant insulating tube 1 and the current-limiting element unit 3, and when the insulating jacket 12 is molded, the EPD
It is formed by filling an insulating material such as M rubber into the inside of the pressure-resistant insulating cylinder 1 through the pressure release hole 2 .
次に、前記のように構成された避雷碍子の製造方法を特
に第2図を参照して説明する。Next, a method for manufacturing the lightning arrester constructed as described above will be explained with particular reference to FIG. 2.
さて、この避雷碍子の製造に際しては、まず、耐圧絶縁
筒1の上端内部に上独立発泡絶縁弾性材10を収容した
状態で、その耐圧絶縁筒1の上端に上電極金具6を嵌合
して接着剤8で固定する。Now, when manufacturing this lightning arrester, first, with the upper closed foam insulating elastic material 10 housed inside the upper end of the voltage-resistant insulating cylinder 1, the upper electrode fitting 6 is fitted to the upper end of the voltage-resistant insulating cylinder 1. Fix with adhesive 8.
次に、耐圧絶縁m1内にその下端側から限流素子ユニッ
ト3を収容して、その上端の上接触金具4を上電極金具
6に係合させる。さらに、耐圧絶縁筒1の下端内部に下
独立発泡、絶縁弾性材11を収容する。そして、限流素
子ユニット3の下端側の不接触金具5にコイルスプリン
グ9を介在させた状態で下電極金具7を押圧しながら、
その下電極金具7を耐圧絶縁筒1の下端に嵌合して接着
剤8で固定する。Next, the current limiting element unit 3 is housed in the voltage-resistant insulation m1 from the lower end side, and the upper contact fitting 4 at the upper end thereof is engaged with the upper electrode fitting 6. Further, a lower independent foam insulating elastic material 11 is housed inside the lower end of the voltage-resistant insulating cylinder 1 . Then, while pressing the lower electrode fitting 7 with the coil spring 9 interposed in the non-contact fitting 5 on the lower end side of the current limiting element unit 3,
The lower electrode fitting 7 is fitted onto the lower end of the voltage-resistant insulating cylinder 1 and fixed with an adhesive 8.
その後、この組立体を図示しない成形型内に入れた状態
で、絶縁外套体12のモールドに先立ってその形成部を
真空引きすると、耐圧絶縁n1と限流素子ユニット3と
の間の空間内にある空気が耐圧絶縁筒1の放圧孔2から
放出されて同空間が負圧になり、それに伴って耐圧絶縁
筒1の上下両端内部に収容された独立発泡絶縁弾性材1
0.11が体積膨張する。従って、この独立発泡絶縁弾
性材10.11の体積膨張で、耐圧絶縁IJ1と限流素
子ユニット3との間の空間が狭くなり、その空間に残留
する空気層を極小にすることができる。Thereafter, when this assembly is placed in a mold (not shown) and the forming part is evacuated prior to molding the insulating jacket 12, the space between the voltage-resistant insulator n1 and the current-limiting element unit 3 is filled. A certain amount of air is released from the pressure relief hole 2 of the pressure-resistant insulating tube 1, and the space becomes negative pressure, and as a result, the closed-cell foam insulating elastic material 1 housed inside both the upper and lower ends of the pressure-resistant insulating tube 1
0.11 expands in volume. Therefore, due to the volumetric expansion of the closed foam insulating elastic material 10.11, the space between the voltage-resistant insulation IJ1 and the current limiting element unit 3 becomes narrower, and the air layer remaining in the space can be minimized.
そして、この状態でEPDMゴム等の材料を成形型内に
注入して、耐圧絶縁筒1及び両電極金具6.7の外周面
に絶縁外套体12をモールド形成すると、そのモールド
と同期してEPDMゴム等の材料が放圧孔2から耐圧絶
縁筒1と限流素子ユニット3との間の空間内に注入され
て、その空間内に内側絶縁814が充填形成される。こ
のとき、体積膨張状態にあった独立発泡絶縁弾性材10
゜11が第1図に示すように偏平状に圧縮されるため、
その偏平状収縮にともないわずかに残った空気も収縮部
分に引寄せられてこの収縮部分に集約される。従って、
内側絶縁層14内への空気の混入量を極小におさえるこ
とができ、耐圧絶縁筒1と限流素子ユニット3との間に
空気が残留するのを防止して絶縁を十分に確保すること
ができる。Then, in this state, a material such as EPDM rubber is injected into the mold and the insulating jacket 12 is molded on the outer peripheral surfaces of the voltage-resistant insulating tube 1 and both electrode fittings 6.7. A material such as rubber is injected into the space between the voltage-resistant insulation tube 1 and the current-limiting element unit 3 through the pressure relief hole 2, and the inner insulation 814 is filled and formed in the space. At this time, the closed foam insulating elastic material 10 which was in a volumetrically expanded state
Since ゜11 is compressed into a flat shape as shown in Figure 1,
As the flattening shrinks, the slight amount of remaining air is also attracted to the contracted portion and concentrated there. Therefore,
The amount of air mixed into the inner insulating layer 14 can be kept to a minimum, and air can be prevented from remaining between the voltage-resistant insulating tube 1 and the current-limiting element unit 3 to ensure sufficient insulation. can.
しかも、製造にあ、たっては耐圧絶縁筒1内にリング状
の独立発泡絶縁弾性材io、1iを配置するだけである
から、その製造はきわめて容易である。Moreover, the manufacturing process is extremely easy because all that is required is to arrange the ring-shaped closed foam insulating elastic materials io and 1i within the voltage-resistant insulating cylinder 1.
(発明の効果)
この発明の避雷碍子は、以上説明したように構成されて
いるため、耐圧絶縁筒と限流素子ユニットとの間の絶縁
を十分確保することがぞきて、信頼性を高めることがで
きるという優れた効果を奏する。(Effects of the Invention) Since the lightning arrester of the present invention is configured as explained above, it is possible to ensure sufficient insulation between the voltage-proof insulating cylinder and the current-limiting element unit, and to improve reliability. It has the excellent effect of being able to
又、この発明の避雷碍子の製造方法によれば、前記のよ
うな避雷碍子を容易に製造することができるとりう効果
を奏する。Further, according to the method for manufacturing a lightning arrester of the present invention, the above-mentioned lightning arrester can be easily manufactured.
第1図はこの発明を具体化した避雷碍子の一実施例を示
す断面図、第2図はその避雷祷子の製造途中の状態を示
す断面図である。
1・・・耐圧絶縁筒、2・・・放圧孔、3・・・限流素
子ユニット、6.7−・・電極金具、9・・・付勢手段
としてのコイルスプリング、10.11・・・独立発泡
絶縁弾性材、12・・・絶縁外套体、14・・・内側絶
縁層。
特許出願人 日本碍子 株式会社
代 理 人 弁理士 恩1)博宣第2図FIG. 1 is a sectional view showing an embodiment of a lightning arrester embodying the present invention, and FIG. 2 is a sectional view showing the lightning arrester in a state in the middle of manufacturing. DESCRIPTION OF SYMBOLS 1... Voltage-proof insulation tube, 2... Pressure relief hole, 3... Current-limiting element unit, 6.7-... Electrode fitting, 9... Coil spring as biasing means, 10.11- ...Closed foam insulating elastic material, 12...Insulating jacket, 14...Inner insulating layer. Patent applicant Nippon Insulator Co., Ltd. Agent Patent attorney On 1) Hironobu Figure 2
Claims (2)
に収納され電圧−電流特性が非直線性の酸化亜鉛等を主
材とする限流素子ユニットと、同じく前記耐圧絶縁筒の
上下両端に嵌合固定された一対の電極金具と、前記耐圧
絶縁筒の上下両端内部に収容されたリング状の独立発泡
絶縁弾性材と、前記耐圧絶縁筒及び電極金具の外周面に
気密性をもってモールドされた絶縁外套体と、その絶縁
外套体のモールド時に耐圧絶縁筒の放圧孔から内部に充
填された内側絶縁層とにより構成したことを特徴とする
避雷碍子。1. A voltage-resistant insulating cylinder having a pressure relief hole, a current-limiting element unit housed inside the voltage-resistant insulating cylinder and mainly made of zinc oxide or the like having non-linear voltage-current characteristics, and both upper and lower ends of the voltage-resistant insulating cylinder. a pair of electrode fittings fitted and fixed to the electrode fittings, a ring-shaped closed foam insulating elastic material housed inside both upper and lower ends of the voltage-resistant insulating cylinder, and an airtight molded material on the outer peripheral surfaces of the voltage-proof insulating cylinder and the electrode fittings. 1. A lightning arrester comprising: an insulating jacket; and an inner insulating layer filled into the inside through a pressure release hole of a voltage-resistant insulating cylinder when the insulating jacket is molded.
圧絶縁筒の一端部内側にはリング状の独立発泡絶縁弾性
材を収容し、該耐圧絶縁筒の内部に限流素子ユニットを
収納して、その一端部を前記電極金具に係合し、前記耐
圧絶縁筒の他端内部に同じくリング状の独立発泡絶縁弾
性材を収容し、一方、前記限流素子ユニットの他端部に
は別の電極金具を嵌合固定し、さらに、前記耐圧絶縁筒
及び両電極金具の外周面に絶縁外套体を、限流素子ユニ
ットと耐圧絶縁筒との間に内側絶縁層をそれぞれ形成す
るために、絶縁外套体の形成部及び限流素子ユニットと
耐圧絶縁筒との間を真空引きにして前記両独立発泡絶縁
弾性材を膨張させた後に絶縁材を注入して絶縁外套体を
モールド形成すると共に、耐圧絶縁筒に形成した放圧孔
から耐圧絶縁筒と限流素子ユニットとの間に絶縁材を注
入し、前記両独立発泡絶縁弾性材を圧縮することを特徴
とする避雷碍子の製造方法。2. An electrode fitting is fitted and fixed to one end of the voltage-resistant insulating cylinder, a ring-shaped closed-foam insulating elastic material is housed inside one end of the voltage-resistant insulating cylinder, and a current-limiting element unit is housed inside the voltage-resistant insulating cylinder. Then, one end thereof is engaged with the electrode fitting, and a ring-shaped closed foam insulating elastic material is similarly accommodated inside the other end of the voltage-proof insulating cylinder, while the other end of the current limiting element unit is In order to fit and fix another electrode fitting, and further to form an insulating jacket on the outer peripheral surfaces of the voltage-resistant insulating tube and both electrode fittings, and an inner insulating layer between the current-limiting element unit and the voltage-proof insulating tube, respectively. , Vacuum is drawn between the forming part of the insulating mantle, the current limiting element unit, and the voltage-resistant insulating cylinder to expand both the closed foam insulating elastic materials, and then injecting an insulating material to mold the insulating mantle. A method for manufacturing a lightning arrester, comprising injecting an insulating material between the voltage-resistant insulating cylinder and the current-limiting element unit through a pressure relief hole formed in the voltage-resistant insulating cylinder, and compressing both the closed-cell foam insulating elastic materials.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7241188A JPH01243319A (en) | 1988-03-25 | 1988-03-25 | Lighting insulator and manufacture thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7241188A JPH01243319A (en) | 1988-03-25 | 1988-03-25 | Lighting insulator and manufacture thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01243319A true JPH01243319A (en) | 1989-09-28 |
Family
ID=13488514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7241188A Pending JPH01243319A (en) | 1988-03-25 | 1988-03-25 | Lighting insulator and manufacture thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01243319A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05274945A (en) * | 1992-03-26 | 1993-10-22 | Ngk Insulators Ltd | Pressurized structure of filler material layer for lightning insulator and press-filling device |
US5363266A (en) * | 1992-06-18 | 1994-11-08 | Raychem Corporation | Electrical surge arrester |
-
1988
- 1988-03-25 JP JP7241188A patent/JPH01243319A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05274945A (en) * | 1992-03-26 | 1993-10-22 | Ngk Insulators Ltd | Pressurized structure of filler material layer for lightning insulator and press-filling device |
JP2566093B2 (en) * | 1992-03-26 | 1996-12-25 | 日本碍子株式会社 | Lightning arrester and its press-fitting device |
US5363266A (en) * | 1992-06-18 | 1994-11-08 | Raychem Corporation | Electrical surge arrester |
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