JPH0316196Y2 - - Google Patents
Info
- Publication number
- JPH0316196Y2 JPH0316196Y2 JP12914985U JP12914985U JPH0316196Y2 JP H0316196 Y2 JPH0316196 Y2 JP H0316196Y2 JP 12914985 U JP12914985 U JP 12914985U JP 12914985 U JP12914985 U JP 12914985U JP H0316196 Y2 JPH0316196 Y2 JP H0316196Y2
- Authority
- JP
- Japan
- Prior art keywords
- current limiting
- limiting element
- main body
- fixed
- terminals
- 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
Links
- 229910052573 porcelain Inorganic materials 0.000 claims description 17
- 238000000465 moulding Methods 0.000 claims description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 description 6
- 239000000057 synthetic resin Substances 0.000 description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 239000012778 molding material Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- GHPGOEFPKIHBNM-UHFFFAOYSA-N antimony(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Sb+3].[Sb+3] GHPGOEFPKIHBNM-UHFFFAOYSA-N 0.000 description 1
- 229910000416 bismuth oxide Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
Landscapes
- Fuses (AREA)
Description
【考案の詳細な説明】
本案は限流素子ユニツトを円筒形カツトアウト
の磁器本体に内蔵する場合の合理的な保持構造を
提案しようとするものである。襲雷の激しい地区
の柱上変圧器を保護する目的で使用する限流素子
内蔵円筒形カツトアウトについては本件出願人が
実開昭56−71636号によつて先に提案した。これ
は、磁器本体の下端開口部に固着した合成樹脂製
の下部カバーに酸化亜鉛（ZnO）を主成分とする
焼結体からなる限流素子を一体に保持し、さらに
同素子の一端に接続する上部端子をカツトアウト
本体の下部固定電極に接続し、また他端の下部端
子を放電ギヤツプを介して腕木取付金具の閃絡角
に対向させるようにした構成からなる限流素子内
蔵円筒形カツトアウトであるが上記先願において
は限流素子を下部カバーに一体に保持させる場
合、素子を下部カバーの成形と同時にインサート
したりあるいは下部カバーの成形後に接着したり
する手段が採られている。[Detailed Description of the Invention] This proposal is an attempt to propose a rational holding structure when a current limiting element unit is built into a cylindrical cut-out porcelain body. The present applicant had previously proposed a cylindrical cutout with a built-in current limiting element for the purpose of protecting pole-mounted transformers in areas subject to frequent lightning strikes in Utility Model Application No. 71636/1983. A current limiting element made of a sintered body whose main component is zinc oxide (ZnO) is integrally held in a synthetic resin lower cover that is fixed to the lower opening of the porcelain body, and is further connected to one end of the element. This is a cylindrical cutout with a built-in current limiting element, with the upper terminal connected to the lower fixed electrode of the cutout body, and the lower terminal at the other end facing the flashing angle of the arm mounting bracket via a discharge gap. However, in the above-mentioned prior application, when the current limiting element is held integrally with the lower cover, the element is inserted at the same time as the lower cover is molded, or is bonded after the lower cover is molded.
ところで、上記保持手段のうち前者のインサー
トの場合は下部カバーが外部環境にさらされて長
期間使用されるために同カバーとしてはすぐれた
耐候性を有すること、さらにはヒユーズ筒から放
出される遮断時の強大な放出ガスの衝撃にも充分
耐えられる強度を必要とすること等の理由からポ
リエチレン樹脂が成形材料として採用されている
が、該合成樹脂（成形材料）は比較的大きく熱変
形する性質があるため限流素子の被覆成形材料と
して最適なものとは言えなかつた。つまり、該合
成樹脂で被覆成形した場合は成形時あるいは使用
時温度変化によりカバーが延びたりするためイン
サートした限流素子と下部カバーの樹脂との密着
が悪くなり同樹脂によつて強く締め付けられてい
た素子相互間の接触圧力が弱められて通電不良を
招くことがある。また、インサートは下部カバー
に成形不良が生じた場合やインサート後において
限流素子に特性不良が生じた場合には限流素子も
カバーも同時に不良になつてしまう等不経済な点
もあつた。またさらに、後者の接着の場合には接
着作業が面倒であるばかりでなく保持が不安定に
なりやすい問題がある。 By the way, in the case of the former type of insert among the above-mentioned holding means, the lower cover is exposed to the external environment and used for a long period of time, so it has excellent weather resistance as a cover, and furthermore, it has to have excellent weather resistance. Polyethylene resin is used as a molding material due to the need for sufficient strength to withstand the impact of the powerful gases emitted during the process, but this synthetic resin (molding material) has the property of being subject to relatively large thermal deformations. Therefore, it could not be said to be the best coating material for current limiting elements. In other words, when the synthetic resin is used to cover and mold, the cover may stretch due to temperature changes during molding or use, resulting in poor adhesion between the inserted current-limiting element and the resin of the lower cover, which causes the resin to tightly tighten the cover. The contact pressure between the elements may be weakened, leading to poor conduction. In addition, the insert is uneconomical in that if a molding defect occurs in the lower cover or if a characteristic defect occurs in the current limiting element after inserting, both the current limiting element and the cover become defective at the same time. Furthermore, in the case of the latter type of adhesion, there is a problem that not only is the adhesion work troublesome, but the holding is likely to be unstable.
本案はこれらの問題を解決するためのもので、
円筒形カツトアウトの磁器本体の下端開口部に固
着した下部カバーに限流素子を保持させ、該限流
素子の上部端子を本体に固着した下部固定電極に
電気的に接続し、又限流素子の下部端子２２を放
電電極２９に接続したものにおいて、前記限流素
子１８を酸化亜鉛を主成分とする焼結体で半円弧
状に形成し、その上下両端面１８ａ，１８ｂに金
属溶射を施し、これに前記上下両端子２１，２２
をそれぞれ接続し、さらに上記両端子２１，２２
のそれぞれの接続部２１ａ，２２ａを除いた上記
両端子２１，２２および素子１８の全外周を絶縁
部材２４で一体に被覆成形した半円弧状の限流素
子ユニツトＢを構成し、前記円筒形の磁器本体１
内には、本体１の下端開口部１ａに固着した下部
カバー１６に本体１の内周壁１ｂに添つて立上り
部１６ａを設け、該立上り部で囲まれた半円弧状
の収納部１６ｂを形成し、この収納部１６ｂに対
し前記限流素子ユニツトＢを嵌入保持したことを
特徴とするものである。 This proposal is aimed at solving these problems.
A current limiting element is held in the lower cover fixed to the lower end opening of the cylindrical cut-out porcelain body, and the upper terminal of the current limiting element is electrically connected to the lower fixed electrode fixed to the main body. In the device in which the lower terminal 22 is connected to the discharge electrode 29, the current limiting element 18 is formed into a semicircular arc shape with a sintered body mainly composed of zinc oxide, and both upper and lower end surfaces 18a and 18b are subjected to metal spraying, To this, both the upper and lower terminals 21, 22
and further connect both terminals 21 and 22.
A semi-circular current limiting element unit B is constructed by integrally covering and molding the entire outer periphery of the terminals 21, 22 and the element 18 with an insulating member 24, excluding the respective connecting portions 21a, 22a, and the cylindrical Porcelain body 1
Inside, a lower cover 16 fixed to the lower end opening 1a of the main body 1 is provided with a rising part 16a along the inner circumferential wall 1b of the main body 1, and a semicircular arc-shaped storage part 16b is formed surrounded by the rising part. The present invention is characterized in that the current limiting element unit B is fitted and held in the housing portion 16b.
原出願においては、限流素子ユニツトの下部端
子２２に放電電極を接続しその放電先尖部を放電
ギヤツプを介して腕木取付金具の閃絡角に対向さ
せた点を考案の構成要件としたものであるが、本
案は上記要件を削除して限流素子ユニツトの下部
カバーに対する保持構造を要旨としたものであ
る。 In the original application, the constituent elements of the invention are that a discharge electrode is connected to the lower terminal 22 of the current limiting element unit, and its discharge tip is opposed to the flashing angle of the arm mounting bracket through the discharge gap. However, the present invention eliminates the above requirements and focuses on a holding structure for the current limiting element unit with respect to the lower cover.
以下、本案の実施例について説明する。 Examples of the present invention will be described below.
１は円筒形の磁器本体、２は上部口出線、３は
下部口出線、４は磁器本体の中央の本体支持バン
ド、５はカツトアウトＡを腕金６に取付けるため
の腕木取付金具、７は支持バンドと腕木取付金具
を連結する支持ボルト、８は同じくナツトであ
る。９は本体に固定した下部固定電極、１０は下
部接触子１１が下部固定電極９に接触して本体内
に保持されるヒユーズ筒、１２はヒユーズ筒に装
着されたヒユーズ、１３は下部口出線３と下部固
定電極９間を連結するリード線、１４は接続用の
ビス、１５は本体内に収納された消弧筒、１７は
緩衝リング、１６は磁器本体の下端開口部１ａに
固着したポリエチレン等の合成樹脂製の下部カバ
ーであり、磁器本体の内周壁１ｂに対し同心的に
配置した上部の延長部１６ａに素子ユニツトＢを
嵌入保持するための凹状で而も半円弧状の収納部
１６ｂを形成し、また下部には下方ラツプ状に拡
開する開口部１６ｃを形成している。また１６ｄ
は一方が上記収納部１６ｂの下部に連通し他方が
側方に開口する放電電極用の取付穴、１６ｅは開
口部の周縁に形成した紐用取付孔である。 1 is a cylindrical porcelain main body, 2 is an upper lead wire, 3 is a lower lead wire, 4 is a main body support band in the center of the porcelain main body, 5 is a arm mounting bracket for attaching the cutout A to the cross arm 6, 7 8 is a support bolt that connects the support band and arm mounting bracket, and 8 is also a nut. 9 is a lower fixed electrode fixed to the main body, 10 is a fuse cylinder whose lower contact 11 contacts the lower fixed electrode 9 and is held within the main body, 12 is a fuse attached to the fuse cylinder, and 13 is a lower lead wire. A lead wire connects 3 and the lower fixed electrode 9, 14 is a connecting screw, 15 is an arc extinguishing tube housed in the main body, 17 is a buffer ring, and 16 is polyethylene fixed to the lower end opening 1a of the porcelain main body. It is a lower cover made of synthetic resin such as porcelain body, and has a concave and semicircular arc-shaped storage part 16b for fitting and holding the element unit B in the upper extension part 16a arranged concentrically with respect to the inner circumferential wall 1b of the porcelain body. , and an opening 16c that expands in a downward lap shape is formed at the bottom. Also 16d
16e is an attachment hole for a discharge electrode, one of which communicates with the lower part of the storage portion 16b and the other side opens to the side, and 16e is an attachment hole for a string formed at the periphery of the opening.
Ｂは第３、第４図でみるように半円弧状に成形
した限流素子ユニツトであり、その限流素子１８
は酸化亜鉛（ZnO）を主成分としこれに微量の金
属酸化物、例えば酸化ビスマス（Bi2O3）、酸化
アンチモン（Sb2O3）などを添加して混合成形し
たのち1200〜1300℃の高温で焼成した無機焼結体
よりなる電圧非直線抵抗体であり、半円弧状に形
成された同素子は上下２段積みして直列接続され
ている。 B is a current-limiting element unit formed into a semicircular arc shape as shown in FIGS. 3 and 4, and the current-limiting element 18
The main component is zinc oxide (ZnO), to which trace amounts of metal oxides such as bismuth oxide (Bi 2 O 3 ) and antimony oxide (Sb 2 O 3 ) are added, mixed and molded, and then heated at 1200 to 1300℃. It is a voltage non-linear resistor made of an inorganic sintered body fired at a high temperature, and the semicircular arc-shaped elements are stacked one above the other and connected in series.
１９は素子端面間に介在するアルミなどよりな
る接触板、２０は各素子の上下各端面の金属溶
射、２１は上記金属溶射を介して上部端面１８ａ
に接続した上部端子であり、その下部を端面に対
し全面にわつたて接続するほか上部は中央のみを
突出させて接続部２１ａを形成している。２１ｂ
は接続部のネジ孔を示す。２２は同じく下部端面
１８ａに接続した下部端子であり、突出した接続
部２２ａにはネジ孔２２ｂが形成されている。２
３はモールド成形用の当金具であり上記端子を成
形時に固定するためのものである。２４は上下各
端子の接続部２１ａ，２２ａを除く両端子２１，
２２と限流素子１８の外周面を一体に被覆形成し
たEPT，EPDM等の耐トラツキング性ゴム、あ
るいはエポキシ、AAS，ABS等の合成樹脂より
なる絶縁部材、２５は上下部端子の周囲に形成さ
れた凹み２６に夫々注入したシリコーン樹脂等の
充填材である。限流素子ユニツトＢは上記構成か
ら成り、上記下部カバー１６が本体１の下端開口
部１ａに固着される前に同カバーの凹状で而も半
円弧状の収納部１６ｂに嵌め込み、また上部端子
の接続部２１ａにはビス２７によつて接続導板２
８を接続する。また下部端子２２の接続部２２ａ
には下部カバーの取付穴１６ｄより差し込んだ放
電電極２９のネジ部２９ａを接続している。３０
は両端子の接続終了後素子ユニツトが形成する間
隙に注入したシリコーン樹脂等の充填材であり、
素子ユニツトを収納部に固定すると共に素子ユニ
ツトの外周をさらに被覆する２重気密の機能をも
有する。３１は放電電極２９の前面に位置し先尖
形状の放電部２９ｂを放電用孔３１ａが囲むよう
にしたテフロン、あるいはシリコーン樹脂よりな
る放電案内部材であり、その周囲をスリ割を形成
して弾力性を持たせ下部カバーの外側から取付穴
１６ｄに押し込めば簡単に嵌着できるようになつ
ている。なお上記の放電用孔３１ａは雨水がこの
孔に停滞しないように上記の如く撥水性を有する
部材にすると同時に特に下部側をより外方に拡開
する不均一なラツパ状に形成して放電のさまたげ
にならないようにしている。１６ｆは取付穴に連
通する排水孔を示す。 19 is a contact plate made of aluminum or the like interposed between the end faces of the elements; 20 is metal sprayed on each of the upper and lower end faces of each element; and 21 is the upper end face 18a through the metal spraying.
The lower part is connected to the end surface vertically across the entire surface, and only the center of the upper part protrudes to form a connecting part 21a. 21b
indicates the screw hole of the connection part. 22 is a lower terminal similarly connected to the lower end surface 18a, and a screw hole 22b is formed in the protruding connecting portion 22a. 2
Reference numeral 3 denotes a metal fitting for molding, which is used to fix the terminal during molding. 24 is both terminals 21 excluding the connection parts 21a and 22a of the upper and lower terminals,
22 and the outer peripheral surface of the current limiting element 18 are integrally coated with an insulating member made of tracking-resistant rubber such as EPT, EPDM, or synthetic resin such as epoxy, AAS, ABS, etc.; 25 is formed around the upper and lower terminals; A filler such as silicone resin is injected into each of the recesses 26. The current limiting element unit B has the above-mentioned structure, and before the lower cover 16 is fixed to the lower end opening 1a of the main body 1, it is fitted into the concave and semicircular housing part 16b of the cover, and the upper terminal The connecting conductor plate 2 is connected to the connecting portion 21a by screws 27.
Connect 8. Also, the connection part 22a of the lower terminal 22
A threaded portion 29a of the discharge electrode 29 inserted through the attachment hole 16d of the lower cover is connected to. 30
is a filler such as silicone resin injected into the gap formed by the element unit after both terminals are connected.
It also has a double airtight function of fixing the element unit in the housing and further covering the outer periphery of the element unit. Reference numeral 31 designates a discharge guide member made of Teflon or silicone resin, which is located on the front surface of the discharge electrode 29 and has a discharge hole 31a surrounding the tip-shaped discharge portion 29b. It is designed so that it can be easily fitted by pushing it into the mounting hole 16d from the outside of the lower cover. The above-mentioned discharge hole 31a is made of a water-repellent material as mentioned above so that rainwater does not stagnate in this hole, and at the same time, it is formed into a non-uniform tapered shape that expands outward more particularly at the lower part to prevent discharge. I try not to get in the way. 16f indicates a drainage hole communicating with the mounting hole.
上記の如く限流素子ユニツトＢの組付が終れ
ば、下部カバー１６は第１図の如く磁器本体１の
下端開口部１ａに接着材３２で固着するのである
が、上部端子に接続する接続導板２８にビス３３
によつてカツトアウト本体側の下部固定電極９に
電気的に接続される。３５は下部カバーの開口部
１６ｃに係合片３９によつて挿着された合成樹脂
製の密栓、４０は一端を下部カバーの紐用取付孔
１６ｅに通して同カバーに連結し他端を密栓に連
結した連結紐、３４は上記カツトアウト本体側の
放電電極２９の放電部２９ｂと放電ギヤツプＧを
介して対向する腕木取付金具５の下部に設けたア
ース側の閃絡角であり、上記放電電極の放電部２
９ｂと同様に先尖形状となつており、これによつ
て放電開始電圧を低くし（同じギヤツプ長で例え
ば球キヤツプのような場合に比べて）Ｖ−ｔ特性
上の立上りを小さくするようにしている。 When the current limiting element unit B is assembled as described above, the lower cover 16 is fixed to the lower end opening 1a of the porcelain main body 1 with adhesive 32 as shown in FIG. Screw 33 on plate 28
It is electrically connected to the lower fixed electrode 9 on the cutout body side. 35 is a synthetic resin seal plug inserted into the opening 16c of the lower cover by an engagement piece 39; 40 is a seal plug having one end passed through the string attachment hole 16e of the lower cover and connected to the same cover; and the other end being a seal plug. The connection string 34 is a flashing angle on the ground side provided at the lower part of the arm mounting bracket 5 that faces the discharge portion 29b of the discharge electrode 29 on the cutout body side via the discharge gap G, and Discharge part 2 of
Like 9b, it has a pointed shape, which lowers the discharge starting voltage (compared to, for example, a ball cap with the same gap length) and reduces the rise in V-t characteristics. ing.
なお同閃絡角３４は断面形の案内金具３６に
よつて前後真すぐにスライドできるようになつて
おりギヤツプの調整がしやすくなつている。３
７，３８は閃絡角を固定するためのボルトとナツ
トを示す。今、上記構成において雷サージが侵入
してくれば放電ギヤツプＧ間にこの電圧が印加さ
れるため設定値以上であれば、同放電ギヤツプＧ
で放電が起こり、サージはカツトアウトの上部口
出線２−上部固定電極（特に図示しない）−ヒユ
ーズ筒の上部接触子（特に図示しない）−ヒユー
ズ１２−ヒユーズ筒の下部接触子１１−カツトア
ウトの下部固定電極９−接続導板２８−上部端子
２１−限流素子１８−下部端子２２−放電電極２
９−放電部２９ｂ−放電ギヤツプＧ−閃絡角３４
−腕木取付金具５を経て大地に放電するもので、
この場合上記の限流素子１８は電圧非直線性が顕
著であり、急竣な立上りをみせるサージに対して
も素早く応答し、電圧を低く制限すると同時に続
流をも発生しないため変圧器の絶縁破壊を防止
し、またカツトアウトのヒユーズ切れも発生させ
ることがない。なお平常時には上記の放電ギヤツ
プＧによつて限流素子１８は電圧が印加されない
ため素子は常時課電による劣化がなく長寿命化が
はかれる。 The flashing angle 34 can be slid straight forward and backward by a cross-sectional guide fitting 36, making it easy to adjust the gap. 3
7 and 38 indicate bolts and nuts for fixing the flash angle. Now, in the above configuration, if a lightning surge enters, this voltage will be applied across the discharge gap G, so if it exceeds the set value, the same discharge gap G will be applied.
A discharge occurs, and a surge occurs between the upper lead wire 2 of the cutout - the upper fixed electrode (not particularly shown) - the upper contact of the fuse tube (not particularly shown) - the fuse 12 - the lower contact 11 of the fuse tube - the lower part of the cutout Fixed electrode 9 - connection conductive plate 28 - upper terminal 21 - current limiting element 18 - lower terminal 22 - discharge electrode 2
9-Discharge part 29b-Discharge gap G-Flash angle 34
- Discharges to the ground via the arm mounting bracket 5,
In this case, the current limiting element 18 described above has significant voltage non-linearity, responds quickly even to surges that show a sudden rise, and at the same time limits the voltage to a low level and does not generate follow-on current, it provides insulation for the transformer. This prevents damage and also prevents cut-out fuses from blowing out. Note that under normal conditions, no voltage is applied to the current-limiting element 18 due to the above-mentioned discharge gap G, so that the element does not deteriorate due to constant energization and has a long lifespan.
以上のように本案においては、その構成を、円
筒形カツトアウトの磁器本体の下端開口部に固着
した下部カバーに限流素子を保持させ、該限流素
子の上部端子を本体に固着した下部固定電極に電
気的に接続し、又限流素子の下部端子２２を放電
電極２９に接続したものにおいて、前記限流素子
１８を酸化亜鉛を主成分とする焼結体で半円弧状
に形成し、その上下両端面１８ａ，１８ｂに金属
溶射を施し、これに前記上下両端子２１，２２を
それぞれ接続し、さらに上記両端子２１，２２の
それぞれの接続部２１ａ，２２ａを除いた上記端
子２１，２２および素子１８の全外周を絶縁部材
２４で一体に被覆成形した半円弧状の限流素子ユ
ニツトＢを構成し、前記円筒形の磁器本体１内に
は、本体１の下端開口部１ａに固着した下部カバ
ー１６に本体１の内周壁１ｂに添つて立上り部１
６ａを設け、該立上り部で囲まれた半円弧状の収
納部１６ｂを形成し、この収納部１６ｂに対し前
記限流素子ユニツトＢを嵌入保持した結果下部カ
バーへの取付が簡単となると同時に確実に保持さ
れる。また、上記の如く下部カバーに嵌入保持し
た半円弧状の素子ユニツトは下部カバーを本体の
下端開口部に固着した場合その内周壁に添つて配
置されるため限られた空間からなる該下端開口部
にも充分内蔵できるためわざわざ磁器本体を拡張
したりする必要がない、また、上記の如く下部カ
バーと限流素子ユニツトとは別々に成形しその
後、合体させるための従来のインサート成形に比
べて成形不良による損害をできる限り低減できる
と同時にそれぞれの成形材料には目的に合つたも
のが選択でき確実な成形ができて不良率を下げる
ことができる等の特長を有するもので実用上有益
なものと言える。 As described above, in this case, the current limiting element is held in the lower cover fixed to the lower end opening of the cylindrical cut-out porcelain body, and the upper terminal of the current limiting element is fixed to the lower fixed electrode fixed to the main body. In the device in which the lower terminal 22 of the current limiting element is electrically connected to the discharge electrode 29, the current limiting element 18 is formed into a semicircular arc shape with a sintered body mainly composed of zinc oxide. Both the upper and lower end surfaces 18a, 18b are subjected to metal spraying, to which both the upper and lower terminals 21, 22 are connected, respectively, and further the terminals 21, 22 and A semicircular arc-shaped current limiting element unit B is formed by integrally covering the entire outer periphery of the element 18 with an insulating member 24, and inside the cylindrical porcelain main body 1 there is a lower part fixed to the lower end opening 1a of the main body 1. A rising portion 1 is provided on the cover 16 along the inner circumferential wall 1b of the main body 1.
6a to form a semi-circular storage portion 16b surrounded by the rising portion, and as a result of fitting and holding the current limiting element unit B into this storage portion 16b, attachment to the lower cover becomes simple and reliable. is maintained. In addition, when the lower cover is fixed to the lower end opening of the main body, the semicircular arc-shaped element unit fitted and held in the lower cover as described above is arranged along the inner peripheral wall of the lower end opening, which has a limited space. There is no need to take the trouble to expand the porcelain body, as it can be fully incorporated into the porcelain body.Also, as mentioned above, the lower cover and current limiting element unit are molded separately and then combined, making molding easier than conventional insert molding. It has the advantage of being able to reduce damage caused by defects as much as possible, as well as selecting molding materials that suit the purpose, ensuring reliable molding, and lowering the defective rate. I can say it.
第１図は本考案の実施例である限流素子内蔵円
筒形カツトアウトの要部を破断した断面図、第２
図は限流素子ユニツトの正面図、第３図は同じく
限流素子ユニツトの平面図、第４図は第２図にお
けるＡ−Ａ断面図、第５図は下部カバーの縦断面
図、第６図は同じく下部カバーの平面図を各々示
す。
１……磁器本体、１ａ……下端開口部、１ｂ…
…内周壁、５……腕木取付金具、９……下部固定
電極、１６……下部カバー、１６ａ……延長部、
１６ｂ……収納部、Ｂ……限流素子ユニツト、１
８……限流素子、１８ａ……上部端面、１８ｂ…
…下部端面、２０……金属溶射、２１……上部端
子、２１ａ……接続部、２１ｂ……ネジ孔、２２
……下部端子、２２ａ……接続部、２２ｂ……ネ
ジ孔、２４……絶縁部材、２９……放電電極、２
９ａ……ネジ部、２９ｂ……放電部、Ｇ……放電
ギヤツプ、３４……閃絡角。
Figure 1 is a cross-sectional view of a main part of a cylindrical cutout with a built-in current limiting element, which is an embodiment of the present invention.
The figure is a front view of the current limiting element unit, FIG. 3 is a plan view of the current limiting element unit, FIG. 4 is a sectional view taken along line A-A in FIG. The figures also each show a plan view of the lower cover. 1... Porcelain body, 1a... Lower end opening, 1b...
... Inner peripheral wall, 5 ... Arm mounting bracket, 9 ... Lower fixed electrode, 16 ... Lower cover, 16a ... Extension part,
16b... Storage section, B... Current limiting element unit, 1
8... Current limiting element, 18a... Upper end surface, 18b...
...lower end surface, 20...metal spraying, 21...upper terminal, 21a...connection section, 21b...screw hole, 22
... lower terminal, 22a ... connection part, 22b ... screw hole, 24 ... insulating member, 29 ... discharge electrode, 2
9a...screw part, 29b...discharge part, G...discharge gap, 34...flash angle.
Claims (1)
固着した下部カバーに限流素子を保持させ、該限
流素子の上部端子を本体に固着した下部固定電極
に電気的に接続し、又限流素子の下部端子２２を
放電電極２９に接続したものにおいて、前記限流
素子１８を酸化亜鉛を主成分とする焼結体で半円
弧状に形成し、その上下両端面１８ａ，１８ｂに
金属溶射を施し、これに前記上下両端子２１，２
２をそれぞれ接続し、さらに上記両端子２１，２
２のそれぞれの接続部２１ａ，２２ａを除いた上
記両端子２１，２２および素子１８の全外周を絶
縁部材２４で一体に被覆成形した半円弧状の限流
素子ユニツトＢを構成し、前記円筒形の磁器本体
１内には、本体１の下端開口部１ａに固着した下
部カバー１６に本体１の内周壁１ｂに添つて立上
り部１６ａを設け、該立上り部で囲まれた半円弧
状の収納部１６ｂを形成し、この収納部１６ｂに
対し前記限流素子ユニツトＢを嵌入保持したこと
を特徴とする限流素子内蔵円筒形カツトアウトに
於ける限流素子ユニツトの保持構造。 A current limiting element is held in the lower cover fixed to the lower end opening of the cylindrical cut-out porcelain body, and the upper terminal of the current limiting element is electrically connected to the lower fixed electrode fixed to the main body. In the device in which the lower terminal 22 is connected to the discharge electrode 29, the current limiting element 18 is formed into a semicircular arc shape with a sintered body mainly composed of zinc oxide, and both upper and lower end surfaces 18a and 18b are subjected to metal spraying, To this, both the upper and lower terminals 21, 2
2, and further connect both terminals 21 and 2.
A semi-circular current limiting element unit B is constituted by integrally covering and molding the entire outer periphery of the terminals 21 and 22 and the element 18 with an insulating member 24, excluding the respective connecting portions 21a and 22a of the cylindrical In the porcelain main body 1, a rising portion 16a is provided along the inner circumferential wall 1b of the main body 1 on a lower cover 16 fixed to the lower end opening 1a of the main body 1, and a semi-circular storage portion surrounded by the rising portion is provided. A holding structure for a current limiting element unit in a cylindrical cutout with a built-in current limiting element, characterized in that the current limiting element unit B is fitted and held in the housing part 16b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12914985U JPH0316196Y2 (en) | 1985-08-23 | 1985-08-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12914985U JPH0316196Y2 (en) | 1985-08-23 | 1985-08-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6188651U JPS6188651U (en) | 1986-06-10 |
| JPH0316196Y2 true JPH0316196Y2 (en) | 1991-04-08 |
Family
ID=30687767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12914985U Expired JPH0316196Y2 (en) | 1985-08-23 | 1985-08-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0316196Y2 (en) |
-
1985
- 1985-08-23 JP JP12914985U patent/JPH0316196Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6188651U (en) | 1986-06-10 |
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