JPH031765B2 - - Google Patents
Info
- Publication number
- JPH031765B2 JPH031765B2 JP57053021A JP5302182A JPH031765B2 JP H031765 B2 JPH031765 B2 JP H031765B2 JP 57053021 A JP57053021 A JP 57053021A JP 5302182 A JP5302182 A JP 5302182A JP H031765 B2 JPH031765 B2 JP H031765B2
- Authority
- JP
- Japan
- Prior art keywords
- lightning
- bushing
- electrode
- arrester element
- lead wire
- 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 - Lifetime
Links
- 239000012212 insulator Substances 0.000 claims description 18
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 14
- 239000004020 conductor Substances 0.000 claims description 11
- 229910052573 porcelain Inorganic materials 0.000 description 10
- 239000010410 layer Substances 0.000 description 9
- 238000004804 winding Methods 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
Description
【発明の詳細な説明】
本発明は、ブツシングに避雷器素子（ZnO等の
無続流素子）を接合して一体化した耐雷ブツシン
グ、に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lightning bushing in which a lightning arrester element (non-following element such as ZnO) is bonded and integrated with the bushing.
従来の耐雷機能を有した電気機器として、例え
ば、ZnO等の無続流特性を有する避雷器素子を内
蔵した変圧器がある。この変圧器にあつては、例
えば、変圧器巻線部分を雷害から保護するために
巻線の電源側に避雷器素子を配置し、これを取付
部に取り付けて絶縁油中に浸漬した構成を有して
いる。 2. Description of the Related Art As a conventional electric device having a lightning protection function, for example, there is a transformer that includes a built-in lightning arrester element having non-follow current characteristics such as ZnO. For this transformer, for example, in order to protect the transformer winding from lightning damage, a lightning arrester element is placed on the power supply side of the winding, and this is attached to the mounting part and immersed in insulating oil. have.
以上の構成において、避雷器素子は絶縁油中で
冷却されて安定した特性を常時維持しながら、襲
雷が発生したときには、雷電流を大地に放流して
巻線部分を確実に雷害より保護することができ
る。 In the above configuration, the arrester element is cooled in insulating oil and maintains stable characteristics at all times, and when a lightning strike occurs, the lightning current is discharged to the ground to reliably protect the winding from lightning damage. be able to.
しかし、従来の避雷器素子を内蔵した例えば、
変圧器等の電気機器にあつては、ZnO等から成る
避雷器素子が絶縁油中に浸漬されているため、絶
縁油の温度上昇が所定の値より大になつたり、使
用期間中のヒートサイクルを受けると避雷器素子
が劣化するおそれがあり、それによつて絶縁抵抗
が低下して、異常電圧が発生しなくても避雷器素
子を介してアース電流が流れる熱暴走と称される
現象を生じるおそれがある。 However, for example, with a built-in conventional lightning arrester element,
In electrical equipment such as transformers, lightning arrester elements made of ZnO, etc. are immersed in insulating oil, which may cause the temperature of the insulating oil to rise above a specified value or cause heat cycles during use. If this happens, the arrester element may deteriorate, resulting in a decrease in insulation resistance and a phenomenon called thermal runaway, where earth current flows through the arrester element even if no abnormal voltage is generated. .
更に避雷器素子を機器内に設けた取付金具等を
用いて取付けているため、組立時に作業性の向上
に限度があつた。 Furthermore, since the lightning arrester element is attached using a mounting bracket provided inside the device, there is a limit to the improvement in workability during assembly.
また、特開昭56−54710号公報には、端子棒を
絶縁する碍子の端部外周上に避雷器素子を同軸状
に配置し、この避雷器素子を端子棒でねじ止めさ
れたナツトと機器ケースの間で固定したブツシン
グが示されている。 Furthermore, Japanese Patent Application Laid-Open No. 56-54710 discloses that a lightning arrester element is coaxially arranged on the outer periphery of the end of an insulator that insulates a terminal bar, and this lightning arrester element is connected to a nut screwed to the terminal bar and an equipment case. The buttings are shown fixed in between.
しかし、このブツシングによると、機器ケース
のブツシング孔に避雷器素子を通すことができ
ず、また、別体のものをナツトで固定しなければ
ならないので作業性が悪く、更に、取付後、ゆる
み、かた等が生じる恐れがあるので信頼性が低
い。 However, with this bushing, it is not possible to pass the lightning arrester element through the bushing hole in the equipment case, and it is difficult to work because a separate item must be fixed with nuts. The reliability is low because there is a possibility that such problems may occur.
更に、特開昭54−124295号公報にも、機器ケー
スと金属板の間に避雷器素子を挟み、ナツトで固
定したブツシングが示されている。これも特開昭
56−54710号公報と同じ問題点を有する。 Furthermore, Japanese Patent Application Laid-open No. 124295/1983 also discloses a bushing in which a lightning arrester element is sandwiched between an equipment case and a metal plate and fixed with a nut. This is also Tokukai Sho
It has the same problem as Publication No. 56-54710.
従つて、本発明の目的は作業性がすぐれた耐雷
ブツシングを提供することである。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a lightning bushing with excellent workability.
本発明の他の目的は高い信頼性を有する耐雷ブ
ツシングを提供することである。 Another object of the invention is to provide a lightning bushing with high reliability.
本発明は上記の目的を実現するため、ブツシン
グの外周に本体ケースのブツシング孔の内径より
小なる外径のリング筒状の避雷器を固定し、この
避雷器の両端にろう付けによつてリード線および
連絡導体を固定し、リード線を内部口出線に接続
するとともに連絡導体を設置用機器ケースに接続
した耐雷ブツシングを提供する。 In order to achieve the above object, the present invention fixes a ring-shaped lightning arrester on the outer periphery of a bushing, the outer diameter of which is smaller than the inner diameter of the bushing hole in the main body case, and connects lead wires and wires to both ends of this lightning arrester by brazing. To provide a lightning-proof bushing in which a connecting conductor is fixed, a lead wire is connected to an internal outlet wire, and the connecting conductor is connected to an equipment case for installation.
以下、本発明の耐雷ブツシング及び耐雷ブツシ
ングを備えた耐雷電気機器を詳細に説明する。 Hereinafter, the lightning-proof bushing of the present invention and the lightning-proof electrical equipment provided with the lightning-proof bushing will be explained in detail.
第１図は本発明の耐雷ブツシングを備えた耐雷
電気機器の一実施例を示し、変圧器本体１底部の
基台２上には巻線３を巻回した鉄芯４が設置され
該鉄芯４上には固定枠５および端子台支え６によ
つて支持される端子台７が設けられ、これらが絶
縁油８中に浸漬されている。端子台７には端子７
ａが支持され、端子７ａはブツシング９ａ，９ｂ
を介して入出力リード線１１ａ，１１ｂと接続さ
れている。電源側のブツシング９ａには後述する
ように避雷器素子が設けられている。 FIG. 1 shows an embodiment of lightning-proof electrical equipment equipped with a lightning-proof bushing of the present invention, in which an iron core 4 around which a winding 3 is wound is installed on a base 2 at the bottom of a transformer main body 1. A terminal block 7 supported by a fixed frame 5 and a terminal block support 6 is provided on the terminal block 4 and is immersed in an insulating oil 8. Terminal 7 on terminal block 7
a is supported, and the terminal 7a is supported by bushings 9a and 9b.
It is connected to input/output lead wires 11a and 11b via. The bushing 9a on the power supply side is provided with a lightning arrester element as described later.
次に、第２図イは避雷器素子１４を有した耐雷
ブツシング９の部分を拡大して示し、導体１１の
外周には、エポキシ樹脂等から成る充填剤層１２
及び磁器碍子１３が同軸状に設けられ、ブツシン
グ９の変圧器側の外周面上にはZnOよりなる避雷
器素子１４が一体的に接合されている。 Next, FIG. 2A shows an enlarged view of the lightning protection bushing 9 having the lightning arrester element 14, and the outer periphery of the conductor 11 is covered with a filler layer 12 made of epoxy resin or the like.
and a porcelain insulator 13 are provided coaxially, and a lightning arrester element 14 made of ZnO is integrally bonded to the outer peripheral surface of the bushing 9 on the transformer side.
第２図ロは上記避雷器素子１４の取付け状態を
示し（以下、第２図イとともに参照する。）避雷
器素子１４と充填剤層１２は接着剤１５（一本焼
成によつて接合しても良い）によつて接合一体化
され、該素子１４両端面部に接触抵抗を減ずるた
めにメタリコン処理によつて形成した電極１４
ａ，１４ｂを有し電極１４ａはろう着け１８によ
つて固定された接触部１６ａを有するリード線１
６を介して内部口出線１９と接続され、電極１４
ｂは磁器碍子１３との間に連絡導体１７を狭ん
で、これらの間にろう着け部１８ａ，１８ｂを配
置して接続される。磁器碍子１３は連絡導体１７
との接合面にメタリコン層１３ｂを形成した後ろ
う着け部１８ｂを介して接合される。 FIG. 2(b) shows the installed state of the above-mentioned lightning arrester element 14 (hereinafter referred to together with FIG. 2(a)). ), and electrodes 14 formed on both end surfaces of the element 14 by metallization treatment to reduce contact resistance.
a, 14b, and the electrode 14a has a contact portion 16a fixed by soldering 18.
6 to the internal lead wire 19, and the electrode 14
b is connected to the porcelain insulator 13 by interposing the connecting conductor 17 therebetween, and by arranging the soldering parts 18a and 18b therebetween. The porcelain insulator 13 is the connecting conductor 17
After forming a metallicon layer 13b on the joint surface, the metallcon layer 13b is joined via a soldering portion 18b.
また、リード線１６の先端部は内部口出線１９
と接続する一方、連絡導体１７の先端部はスプリ
ング２０の弾性力により碍子１３の溝１３ａ内に
圧接されるよう構成する。 In addition, the tip of the lead wire 16 is connected to the internal outlet wire 19.
On the other hand, the tip of the connecting conductor 17 is configured to be pressed into the groove 13a of the insulator 13 by the elastic force of the spring 20.
スプリング２０は支え金具２１と一体化され、
スプリング２０が磁器碍子１３の外周面上に形成
された溝１３ａ内に着座するとスプリング２０の
弾性によつて支え金具２１はブツシングに固着さ
れる。 The spring 20 is integrated with the support fitting 21,
When the spring 20 is seated in the groove 13a formed on the outer peripheral surface of the porcelain insulator 13, the elasticity of the spring 20 fixes the support fitting 21 to the bushing.
本体１のブツシング孔１０内にブツシングを挿
入固定するにあたつては、本体外部からブツシン
グを挿入後スプリング２０を有する支え金具２１
を碍子外周に取着し、つづいて支え金具２１の突
部２１ａに形成されたネジ穴内に止めネジ２２を
螺入して締付け、ネジ２２の先端で本体１の内壁
を押圧することによりブツシング全体が図面左方
に移動してパツキング２３が圧縮される。次い
で、リード線１６を内部口出線１９に圧縮接続し
て避雷器素子１４の接続を終了する。符号２４は
油切りを示す。 When inserting and fixing the bushing into the bushing hole 10 of the main body 1, after inserting the bushing from the outside of the main body, a support fitting 21 having a spring 20 is inserted.
is attached to the outer periphery of the insulator, then the set screw 22 is screwed into the screw hole formed in the protrusion 21a of the support fitting 21 and tightened, and the tip of the screw 22 is pressed against the inner wall of the main body 1, thereby removing the entire bushing. moves to the left in the drawing, and the packing 23 is compressed. Next, the lead wire 16 is compressed and connected to the internal outlet wire 19 to complete the connection of the lightning arrester element 14. Reference numeral 24 indicates an oil drain.
また、前記磁器碍子１３は符号１３ｃで示すよ
うに沿面距離を大にした耐塩構造とするのが好ま
しい。 Further, it is preferable that the porcelain insulator 13 has a salt-resistant structure with a large creepage distance, as shown by reference numeral 13c.
以上の構成において襲雷があると、雷電流はリ
ード線１６を経て避雷器素子１４に導びかれ、ス
プリング２０、支え金具２１、止めネジ２２、本
体１を介してアースへ放流される。 When a lightning strike occurs in the above configuration, lightning current is guided to the arrester element 14 via the lead wire 16, and is discharged to the ground via the spring 20, the support fitting 21, the set screw 22, and the main body 1.
次に、第３図は本発明の他の実施例を示し導体
の外周には充填剤層１２及び磁器碍子１３が同軸
状に設けられ、該磁器碍子１３の変圧器側の外周
面上にはZnOよりなる避雷器素子１４が、接着剤
１５によつて接合一体化されている。接着剤の代
りに焼成方法により接合してもよい。この避雷器
素子１４の両電極１４ａ，１４ｂには、前記実施
例と同様、メタリコン被覆層を形成し、電極１４
ａはリード線１６に接続する一方、電極１４ｂは
避雷器素子１４に設けた溝に位置する（溝にメタ
リコン層を形成する）スプリング２０と直接接続
する。リード線１６の一端は電極１４ａの端面と
接続し、他端は、充填剤層１２に突き刺すように
して内部口出線１９と接続させる。 Next, FIG. 3 shows another embodiment of the present invention, in which a filler layer 12 and a porcelain insulator 13 are provided coaxially around the outer periphery of the conductor, and on the outer periphery of the porcelain insulator 13 on the transformer side. A lightning arrester element 14 made of ZnO is integrally bonded with an adhesive 15. They may be joined by a firing method instead of using an adhesive. Both electrodes 14a and 14b of this lightning arrester element 14 are coated with a metallicon coating layer, as in the previous embodiment, and
a is connected to the lead wire 16, while the electrode 14b is directly connected to a spring 20 located in a groove provided in the arrester element 14 (forming a metallicon layer in the groove). One end of the lead wire 16 is connected to the end surface of the electrode 14a, and the other end is connected to the internal lead wire 19 so as to pierce the filler layer 12.
以上説明した通り、本発明の耐雷ブツシング及
び耐雷ブツシングを使用した耐雷電気機器によれ
ば、避雷器素子をブツシングに直接取着して一体
構造としたため、変圧器内の絶縁油の温度上昇に
伴なつて生じる熱暴走現象を防止し、かつ避雷器
素子の取付け作業の簡易化を達成することができ
る。 As explained above, according to the lightning-proof bushing of the present invention and the lightning-proof electrical equipment using the lightning-proof bushing, since the lightning arrester element is directly attached to the bushing and has an integral structure, it is possible to reduce the risk of damage caused by the rise in temperature of the insulating oil in the transformer. This makes it possible to prevent the thermal runaway phenomenon that occurs when the lightning arrester element is installed, and to simplify the installation work of the lightning arrester element.
以上の２つの実施例において、スプリング２０
が避雷器素子１４の外周を回避して、碍子１３外
周上に取り付けられているのは、接合部１５に直
接荷重がかかることを防止して、耐久性の向上を
図つたものである。第３図の実施例は、磁器碍子
１３と避雷器素子１４との間に磁器碍子１３が介
在しているので機械的強度にすぐれ、第２図の実
施例は避雷器素子１４の肉厚が大なので容量が大
きい。 In the above two embodiments, the spring 20
is attached on the outer periphery of the insulator 13, avoiding the outer periphery of the lightning arrester element 14, in order to prevent direct load from being applied to the joint 15 and improve durability. The embodiment shown in FIG. 3 has excellent mechanical strength because the porcelain insulator 13 is interposed between the porcelain insulator 13 and the arrester element 14, and the embodiment shown in FIG. 2 has a large thickness of the arrester element 14. Large capacity.
以上説明した通り、本発明の耐雷ブツシングに
よると、機器ケースのブツシング孔から外周に避
雷器素子を固定した碍子を挿入して機器ケースに
固定することができるので作業性および信頼性を
向上することができる。 As explained above, according to the lightning bushing of the present invention, the insulator with the lightning arrester element fixed to the outer periphery can be inserted through the bushing hole of the equipment case and fixed to the equipment case, thereby improving workability and reliability. can.
第１図は本発明の耐雷ブツシングを備えた耐雷
電気機器の一実施例の説明図であり、第２図イは
避雷器素子を有した耐雷ブツシングの拡大図であ
り、第２図ロは避雷器素子の取付け状態の説明図
であり、第３図は本発明の耐雷ブツシングの他の
実施例の説明図である。
符号の説明 １…変圧器本体、２…基台、３…
巻線、４…鉄芯、５…固定枠、６…端子台支え、
７…端子台、７ａ…端子、８…絶縁油、９…ブツ
シング、９ａ…電源側ブツシング、９ｂ…負荷側
ブツシング、１０…孔、１１ａ…入力側リード
線、１１ｂ…出力側リード線、１２…充填剤層、
１３…磁器碍子、１３ａ…溝、１３ｂ…メタリコ
ン層、１３ｃ…耐塩構造部分、１４…避雷器素
子、１４ａ，１４ｂ…電極、１５…接着剤、１６
…リード線、１７…連絡導体、１８，１８ａ，１
８ｂ…ろう着け層、１９…内部口出線、２０…ス
プリング、２１…金具、２２…止めネジ、２３…
パツキン、２４…油切り。
FIG. 1 is an explanatory diagram of an embodiment of lightning-resistant electrical equipment equipped with a lightning-proof bushing of the present invention, FIG. FIG. 3 is an explanatory diagram of another embodiment of the lightning-proof bushing of the present invention. Explanation of symbols 1...Transformer body, 2...Base, 3...
Winding wire, 4... Iron core, 5... Fixed frame, 6... Terminal block support,
7... Terminal block, 7a... Terminal, 8... Insulating oil, 9... Bushing, 9a... Power side bushing, 9b... Load side bushing, 10... Hole, 11a... Input side lead wire, 11b... Output side lead wire, 12... filler layer,
13...Porcelain insulator, 13a...Groove, 13b...Metallicon layer, 13c...Salt-resistant structure portion, 14...Surge arrester element, 14a, 14b...Electrode, 15...Adhesive, 16
...Lead wire, 17...Connection conductor, 18, 18a, 1
8b... Brazing layer, 19... Internal lead wire, 20... Spring, 21... Metal fitting, 22... Set screw, 23...
Patsukin, 24...Drain the oil.
Claims (1)
ブツシング孔の内径より小なる外径のリング状円
筒型の避雷器素子と、 前記避電器素子の両端に施された導電性処理に
よつて形成された第１および第２の電極部と、 前記第１の電極部に一端をろう付けされ、前記
リード線の内部口出部に他端を接続されたリード
導体と、 前記第２の電極部にろう付けされた連絡導体
と、 前記連絡導体に接触しながら前記碍子本体を前
記機器ケースに固定することにより前記第２の電
極部をアースする固定手段より構成されることを
特徴とする耐雷ブツシング。[Scope of Claims] 1. An insulator body into which a lead wire is passed through; a ring-shaped cylindrical lightning arrester element that is joined and integrated with the insulator body and has an outer diameter smaller than the inner diameter of a bushing hole in an equipment case; first and second electrode parts formed by conductive treatment applied to both ends of the earth arrestor element, one end of which is brazed to the first electrode part, and an internal outlet part of the lead wire; a lead conductor whose other end is connected to the second electrode; a connecting conductor brazed to the second electrode; and the second electrode is fixed by fixing the insulator body to the equipment case while contacting the connecting conductor. A lightning-proof bushing characterized by comprising a fixing means for grounding the part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5302182A JPS58169814A (en) | 1982-03-31 | 1982-03-31 | Lightning resistant bushing and lightning resistant electric device using same bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5302182A JPS58169814A (en) | 1982-03-31 | 1982-03-31 | Lightning resistant bushing and lightning resistant electric device using same bushing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58169814A JPS58169814A (en) | 1983-10-06 |
| JPH031765B2 true JPH031765B2 (en) | 1991-01-11 |
Family
ID=12931238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5302182A Granted JPS58169814A (en) | 1982-03-31 | 1982-03-31 | Lightning resistant bushing and lightning resistant electric device using same bushing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58169814A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107195443B (en) * | 2017-07-20 | 2019-05-03 | 山东理工大学 | Distribution transformer sealing insulation thunder-proof bushing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54124295A (en) * | 1978-03-18 | 1979-09-27 | Mitsubishi Electric Corp | Lightning-proof bushing |
| JPS5654710A (en) * | 1979-10-09 | 1981-05-14 | Mitsubishi Electric Corp | Bushing with arrester function |
-
1982
- 1982-03-31 JP JP5302182A patent/JPS58169814A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54124295A (en) * | 1978-03-18 | 1979-09-27 | Mitsubishi Electric Corp | Lightning-proof bushing |
| JPS5654710A (en) * | 1979-10-09 | 1981-05-14 | Mitsubishi Electric Corp | Bushing with arrester function |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58169814A (en) | 1983-10-06 |
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