JPH0513142A - Arrester - Google Patents
ArresterInfo
- Publication number
- JPH0513142A JPH0513142A JP16469991A JP16469991A JPH0513142A JP H0513142 A JPH0513142 A JP H0513142A JP 16469991 A JP16469991 A JP 16469991A JP 16469991 A JP16469991 A JP 16469991A JP H0513142 A JPH0513142 A JP H0513142A
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- JP
- Japan
- Prior art keywords
- zinc oxide
- internal
- lightning arrester
- metal
- arrester
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、避雷器に係り、特に、
酸化亜鉛素子を用いた複数個の避雷器単位を段積みにし
た避雷器における、汚損時の内部電界ストレスを緩和す
る避雷器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightning arrester, and more particularly,
The present invention relates to a lightning arrester in which a plurality of lightning arrester units using a zinc oxide element are stacked, and which alleviates internal electric field stress at the time of pollution.
【０００２】[0002]
【従来の技術】一般に、変電システムなどには、雷サー
ジや開閉サージから他の機器を保護するため、避雷器を
組み入れている。この避雷器としては、近年、非直線性
能に優れた酸化亜鉛素子を内部要素として用いた、ギャ
ップレス形のものが主流になっており、シンプルな構造
であり、高い信頼性を得ている。2. Description of the Related Art Generally, a lightning arrester is incorporated in a substation system or the like in order to protect other devices from lightning surges and switching surges. In recent years, as the lightning arrester, a gapless type using a zinc oxide element excellent in non-linear performance as an internal element has become mainstream, has a simple structure, and has high reliability.
【０００３】この酸化亜鉛素子を用いた避雷器の従来構
造を図７、８に示す。これらの図に示す構造は、段積み
にされて避雷器を構成する避雷器単位１００に関するも
のである。この避雷器単位１００は、密封した碍子管１
０１に内部要素１０２を収納する構造としている。つま
り、碍子管１０１の両端部は、パッキン１０３を介して
蓋１０４を被せ、この蓋１０４に別のパッキン１０５を
介して避圧膜１０６を置き、この避圧膜１０６を押え１
０７で挟み込んでいる。内部要素１０２は、積み重ねら
れた酸化亜鉛素子１０８をある枚数毎に仕切板１０９で
区切り、その下方に、碍子管１０１の内長との協調をと
るための金属管１１０を配設した構造を有する。さら
に、素子１０８のセンタリングと導通面の確実な密着を
図るため、複数本の絶縁ロッド１１１が素子１０８の側
面に接触した状態で仕切板１０９を貫通して配置され、
その両端がナットで固定されている。内部要素１０２の
上端側と蓋１０４の間にはバネ１１２が介挿され、内部
要素１０２がバネ１１２により強く押され、振動や部品
寸法のばらつきを吸収しつつ、確実な導通がとれるよう
になっている。この構成の避雷器単位１００は、汚損度
に応じて、碍子管１０１を長くしたり、酸化亜鉛素子１
０８の積層数及び金属管１１０の長さを増減させる。そ
して、その避雷器単位を複数個、段積みして所定の定格
電圧の避雷器を構成している。The conventional structure of a lightning arrester using this zinc oxide element is shown in FIGS. The structures shown in these figures relate to a lightning arrester unit 100 that is stacked to form an arrester. This lightning arrester unit 100 includes a sealed insulator tube 1
The internal element 102 is housed in 01. That is, the both ends of the insulator tube 101 are covered with the lids 104 via the packings 103, and the pressure-relief film 106 is placed on the lids 104 via the other packings 105.
It is sandwiched with 07. The internal element 102 has a structure in which the stacked zinc oxide elements 108 are divided into a certain number of sheets by a partition plate 109, and a metal tube 110 for coordinating with the inner length of the insulator tube 101 is arranged below the partition plate 109. .. Further, in order to ensure a close contact between the centering of the element 108 and the conducting surface, a plurality of insulating rods 111 are arranged so as to penetrate the partition plate 109 while being in contact with the side surface of the element 108.
Both ends are fixed with nuts. A spring 112 is inserted between the upper end side of the internal element 102 and the lid 104, and the internal element 102 is strongly pressed by the spring 112, so that reliable conduction can be achieved while absorbing vibration and variations in component dimensions. ing. In the lightning arrester unit 100 having this configuration, the insulator tube 101 is lengthened or the zinc oxide element 1 is used depending on the degree of pollution.
The number of laminated layers of 08 and the length of the metal tube 110 are increased or decreased. A plurality of lightning arrester units are stacked to form a lightning arrester having a predetermined rated voltage.
【０００４】ところで、上述の構成の避雷器を汚損度の
高い場所で使用する場合、所定の汚損耐電圧を確保する
ために、碍子管１０１を長くして、その表面漏れ距離を
増加させる必要がある。これに対し、酸化亜鉛素子１０
８は雷サージや開閉サージに起因する過電圧を制限し、
他の変電機器の絶縁耐力以下に抑制する使命があるた
め、その積層数を増加できない。By the way, when the lightning arrester having the above-mentioned structure is used in a place with a high degree of pollution, it is necessary to lengthen the insulator tube 101 and increase its surface leakage distance in order to secure a predetermined pollution withstand voltage. .. On the other hand, the zinc oxide element 10
8 limits the overvoltage caused by lightning surge and switching surge,
The number of laminated layers cannot be increased because there is a mission to suppress it to be lower than the dielectric strength of other transformers.
【０００５】このため、碍子管１０１が長くなり且つ酸
化亜鉛素子１０８の積層数を増やせない以上、必然的
に、金属管１１０を長くすることにより、内部要素１０
２を碍子管１０１に収納することとなる。Therefore, as long as the insulator tube 101 becomes long and the number of layers of the zinc oxide elements 108 cannot be increased, the metal tube 110 is inevitably lengthened, so that the internal element 10 is inevitably lengthened.
2 will be stored in the insulator tube 101.
【０００６】このように構成された、汚損地域向けの段
積み避雷器の内部断面のモデルを図９（ａ）に示し、そ
の避雷器の汚損有り、無しのときの電圧分担特性の比較
を図９（ｂ）に示す。図９（ａ）は３段積み避雷器を示
すもので、酸化亜鉛素子１０８は各避雷器単位１００内
の上方に突き上げて積層し、その下方には非常に長い金
属管１１０を配設し、耐汚損形の避雷器を形成してい
る。酸化亜鉛素子１０８は、浮遊静電容量の影響によ
り、上段側になるほど、避雷器単位１００の分担電圧が
多くなる。このため、上段、中段、下段の避雷器単位１
００，…，１００では、上段側になるほど、酸化亜鉛要
素１０８の積層数を多くして、グレードを付けると共
に、３段構成の最上部にシールドリング１１３を図示の
如く取り付け、電圧分担を均一化させている。FIG. 9 (a) shows a model of the internal cross section of a stacked arrester for a polluted area constructed in this way, and FIG. 9 (shows a comparison of voltage sharing characteristics with and without pollution of the arrester. Shown in b). FIG. 9 (a) shows a three-stage lightning arrester, in which the zinc oxide element 108 is pushed up and stacked in each lightning arrester unit 100, and a very long metal tube 110 is arranged below it to prevent contamination. Form a lightning arrester. Due to the influence of the floating capacitance, the zinc oxide element 108 has a larger shared voltage of the arrester unit 100 as it goes to the upper stage side. Therefore, the upper, middle, and lower arrester units 1
00, ..., 100, the number of layers of the zinc oxide element 108 is increased toward the upper side to give a grade, and the shield ring 113 is attached to the uppermost portion of the three-stage configuration as shown in the figure to make the voltage distribution uniform. I am letting you.
【０００７】図９（ｂ）は上述の３段積みの避雷器の電
圧分担を示すもので、縦軸は同図（ａ）の避雷器の高さ
を、横軸は電圧Ｖの割合を表している。図中、実線Ａ，
Ｂは汚損の無い状態若しくは汚損している場合でも、碍
子表面が乾燥している状態のもので、実線Ａは酸化亜鉛
素子１０８の電圧分担を、実線Ｂは碍子管１０１の電圧
分担である。つまり、汚損の影響が無い状態では碍子表
面のインピーダンスが高いため、各電圧分担Ａ，Ｂは避
雷器単位１００内の素子１０８の積層数に比例する。ま
た、金属管１１０と碍子管下部の金属部１１４が同電位
となる。碍子管１０１は上下の金属部１１４、１１４間
の磁器部分で電圧を分担するので、金属管１１０が長い
場合には、上段の避雷器単位１００における抵抗体部分
１１５の最下部と碍子管１０１との間に最大の電位差Ｖ
ｅを生じる。FIG. 9 (b) shows the voltage sharing of the above-mentioned three-stage lightning arrester, in which the vertical axis represents the height of the lightning arrester in FIG. 9 (a) and the horizontal axis represents the ratio of the voltage V. .. In the figure, the solid line A,
B indicates a state in which there is no fouling or the surface of the insulator is dry even when it is fouled. A solid line A indicates voltage sharing of the zinc oxide element 108, and a solid line B indicates voltage sharing of the insulator tube 101. That is, since the impedance of the insulator surface is high in a state where there is no influence of contamination, each voltage sharing A and B is proportional to the number of layers of the elements 108 in the arrester unit 100. Further, the metal tube 110 and the metal portion 114 below the insulator tube have the same potential. Since the insulator tube 101 shares the voltage with the porcelain portion between the upper and lower metal parts 114, 114, when the metal tube 110 is long, the insulator tube 101 is separated from the lowermost portion of the resistor portion 115 in the upper arrester unit 100. Maximum potential difference V
yields e.
【０００８】一方、図９（ｂ）中、破線Ｃ，Ｄは汚損の
影響を受けた状態を示すもので、破線Ｃは酸化亜鉛素子
１０８の電圧分担、破線Ｄは碍子管１０１の電圧分担で
ある。碍子管１０１の表面が平等に汚損すると、今度は
碍子管表面のインピーダンスが低くなるため、各避雷器
単位１００の電圧分担は碍子管１０１の表面漏れ距離に
比例している。つまり、各避雷器単位１００の碍子管１
０１の構成が同一であるならば、最大の電位差Ｖｅは内
部素子数の最も少ない、下段の避雷器単位１００におけ
る抵抗体部分１１５の最下部と碍子管１０１との間に生
じる。On the other hand, in FIG. 9 (b), broken lines C and D show the state of being affected by fouling, the broken line C is the voltage sharing of the zinc oxide element 108, and the broken line D is the voltage sharing of the insulator tube 101. is there. When the surface of the insulator tube 101 is evenly soiled, the impedance of the surface of the insulator tube becomes low, so that the voltage sharing of each arrester unit 100 is proportional to the surface leakage distance of the insulator tube 101. In other words, insulator tube 1 for each arrester unit 100
If the configuration of 01 is the same, the maximum potential difference Ve occurs between the lowermost portion of the resistor portion 115 and the insulator tube 101 in the lightning arrester unit 100 in the lower stage having the smallest number of internal elements.
【０００９】汚損が不平等の場合、碍子管表面のインピ
ーダンスもアンバランスになるため、そのインピーダン
スが高いほど分担電圧が多くなる。このとき、抵抗体部
分１１５の最下部と碍子管１０１との間に生じる電位差
Ｖｅは、不平等汚損の程度如何によって、非常に大きな
値になる可能性がある。When the pollution is unequal, the impedance of the insulator tube surface also becomes unbalanced, and the higher the impedance, the larger the shared voltage. At this time, the potential difference Ve generated between the lowermost portion of the resistor portion 115 and the insulator tube 101 may have a very large value depending on the degree of unequal contamination.
【００１０】[0010]
【発明が解決しようとする課題】上述のように、耐汚損
形避雷器は通常、積層した酸化亜鉛素子（群）１０８の
下側に挿入する金属管１１０が非常に長くなることか
ら、抵抗体部分１１５の最下部と碍子管１０１との間に
大きな電位差Ｖｅを生じ、この電位差Ｖｅにより内部の
電界ストレスが増加してしまう。As described above, in the antifouling type arrester, since the metal tube 110 to be inserted below the stacked zinc oxide element (group) 108 is usually very long, the resistor portion is not provided. A large potential difference Ve is generated between the lowermost portion of 115 and the insulator tube 101, and this potential difference Ve increases the electric field stress inside.
【００１１】一般に、電界ストレスＥは、次式で計算で
きる。Generally, the electric field stress E can be calculated by the following equation.
【００１２】Ｅ＝ｆ（Ｖｅ／ｄo ） ……（１） ここで、ｆは電界係数であり、電極と誘電体の位置関係
等によって決まる数値、ｄo は酸化亜鉛素子と絶縁ロッ
ドとの間のギャップ長（図８参照）である。E = f (Ve / d o ) ... (1) where f is the electric field coefficient, and is a numerical value determined by the positional relationship between the electrode and the dielectric, and d o is the zinc oxide element and the insulating rod. It is the gap length (see FIG. 8).
【００１３】この電界ストレスＥを前述した図７、８の
構成について考察する。前述した構成では、内部素子１
０８と絶縁ロッド１１１とを接触させているが、絶縁ロ
ッド１１１は軸方向両端で固定されているから、酸化亜
鉛素子１０８の積層時のずれや径のばらつきにより、実
際には、素子１０８の側面との間に微小なギャップがｄ
o が存在する。絶縁ロッド１１１は所定の絶縁性能と機
械的強度を必要とするため、その材料としてはＦＲＰ
（繊維強化プラスチック）などの比誘電率＝５〜６の絶
縁材料が選定される。このように、素子１０８の側面に
微小ギャップｄo を有して絶縁ロッド１１１が配設され
ると、電界係数ｆも大きな値をとることから、（１）式
で計算される電界ストレスＥが大きくなって、微小ギャ
ップｄo 部分に電界が集中してしまう。The electric field stress E will be considered with respect to the configurations shown in FIGS. In the configuration described above, the internal element 1
08 and the insulating rod 111 are in contact with each other, but since the insulating rod 111 is fixed at both ends in the axial direction, the side surface of the element 108 may actually be different due to a deviation or a variation in diameter when the zinc oxide element 108 is stacked. A small gap between
o exists. Since the insulating rod 111 requires a predetermined insulating performance and mechanical strength, its material is FRP.
An insulating material having a relative dielectric constant of 5 to 6 such as (fiber reinforced plastic) is selected. Thus, when the side minute gap d o insulating rod 111 has to the element 108 is provided, also electric field factor f from taking a large value, the electric field stress E calculated in (1) increases, the electric field is concentrated in the small gap d o part.
【００１４】また、汚損状態又は汚損の無い状態におい
ても、図９（ｂ）に示した電位差Ｖｅはコロナ開始電圧
を上回る電界ストレスとなる可能性があった。このよう
に電界ストレスが増大すると、内部コロナが発生し易く
なる。内部コロナが発生すると、絶縁ロッド１１１の沿
面が軸方向に劣化し、沿面地絡に至ってしまう可能性が
あった。Further, even in the fouling state or the state without fouling, the potential difference Ve shown in FIG. 9 (b) may be an electric field stress exceeding the corona starting voltage. When the electric field stress increases in this way, internal corona is likely to occur. When the internal corona occurs, the creeping surface of the insulating rod 111 may deteriorate in the axial direction, leading to a creeping ground fault.
【００１５】本発明は、このような従来技術の問題に鑑
みてなされたもので、耐汚損形として酸化亜鉛素子群の
下方に、碍子管の内長との協調をとるための金属管を取
り付けた構造であっても、内部の電界ストレスを減少さ
せてコロナ放電の発生を抑制し、これにより絶縁劣化を
抑制できるようにした避雷器を提供することを目的とす
る。The present invention has been made in view of the above problems of the prior art. As a stain resistant type, a metal tube for coordinating with the inner length of the insulator tube is attached below the zinc oxide element group. Even with such a structure, it is an object of the present invention to provide a lightning arrester capable of suppressing the occurrence of corona discharge by reducing the internal electric field stress and thereby suppressing the insulation deterioration.
【００１６】[0016]
【課題を解決するための手段】上記目的を達成するた
め、本発明は、複数個の酸化亜鉛素子を積層した酸化亜
鉛素子群と、この酸化亜鉛素子群の積層方向の一方の端
部に設けた金属管と、上記酸化亜鉛素子群の所定位置に
挿入すると共に上記素子群と金属管から成る要素の両端
部に設けた複数の導電性の板体と、この複数の板体を貫
通して配置され上記要素及び板体全体を固定する絶縁ロ
ッドとを有して内部要素を形成し、この内部要素を、両
端を金属製フランジで密封した磁器製の碍子管内に収納
して避雷器単位を形成し、この避雷器単位の複数個を直
列に段積みにした構造を備えた避雷器において、前記酸
化亜鉛素子の積層間の所定位置に金属製スペーサを挿入
すると共に、前記板体には、前記内部要素を成す積層体
の積層方向の位置を固定するガイド部を設け、前記絶縁
ロッドを上記積層体から一定の気中距離を隔てた位置で
上記板体に貫通させている。In order to achieve the above object, the present invention provides a zinc oxide element group in which a plurality of zinc oxide elements are laminated, and a zinc oxide element group provided at one end portion in the laminating direction. A metal tube, a plurality of conductive plate bodies inserted into the zinc oxide element group at predetermined positions and provided at both ends of the element group and the metal tube, and penetrating the plurality of plate bodies. An internal element is formed having the above-mentioned element and an insulating rod for fixing the whole plate, and the internal element is housed in a porcelain insulator tube whose both ends are sealed by metal flanges to form a lightning arrester unit. In the lightning arrester having a structure in which a plurality of lightning arrester units are stacked in series, a metal spacer is inserted at a predetermined position between the stacked layers of the zinc oxide element, and the plate element is provided with the internal element. The stacking direction position of the stack Provided a constant guiding unit, and is passed through to the plate body said insulation rod at a position spaced a certain air intermediate distance from the laminate.
【００１７】[0017]
【作用】本発明では、酸化亜鉛素子及びスペーサ、金属
管、板体から成る一連の積層体は、板体に設けたガイド
部に係止されて位置決めされ、センタリングが的確に行
われる。この状態で、複数の酸化亜鉛素子の間に金属製
スペーサを挿入することにより、各素子が積層方向に分
散し、抵抗体部分が長くなるから、電圧分担域も積層方
向に広がる。これにより、抵抗体部分の下端部の位置が
スペーサを挿入しない場合よりも下がり、その下端部の
位置と碍子管との電位差が小さくなる。また、絶縁ロッ
ドは積層体のセンタリングの役目から解放され、専ら積
層体の積層方向の固定を担う。つまり、絶縁ロッドは積
層体から十分離れて板体を貫通するので、絶縁ロッドと
素子との電界係数が小さくなる。このように、電位差が
低下し、且つ、電界係数も小さくなるので、避雷器内部
の電界ストレスが下がり、コロナ放電による絶縁劣化も
抑制される。また軸方向の沿面せん絡も防止でき、耐汚
損特性も向上する。According to the present invention, a series of laminated bodies composed of the zinc oxide element, the spacer, the metal tube, and the plate body are locked by the guide portion provided on the plate body and positioned, so that the centering is accurately performed. In this state, by inserting metal spacers between the plurality of zinc oxide elements, the elements are dispersed in the stacking direction and the resistor portion becomes long, so that the voltage sharing region also spreads in the stacking direction. As a result, the position of the lower end of the resistor portion is lower than in the case where the spacer is not inserted, and the potential difference between the position of the lower end and the insulator tube becomes smaller. Further, the insulating rod is released from the function of centering the laminated body, and is solely responsible for fixing the laminated body in the laminating direction. That is, since the insulating rod penetrates the plate body sufficiently apart from the laminated body, the electric field coefficient between the insulating rod and the element becomes small. In this way, the potential difference is reduced and the electric field coefficient is also reduced, so that the electric field stress inside the lightning arrester is reduced and the insulation deterioration due to corona discharge is suppressed. In addition, it is possible to prevent axial creeping and improve the anti-fouling property.
【００１８】[0018]
【実施例】以下、本発明の一実施例を図１〜図６に基づ
き説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１９】酸化亜鉛素子を用いた避雷器単位１の構造
を図１〜図３に示し、その避雷器単位１を段積みにした
耐汚損形避雷器２の構造を図４に示す。1 to 3 show the structure of a lightning arrester unit 1 using a zinc oxide element, and FIG. 4 shows the structure of an antifouling lightning arrester 2 in which the lightning arrester units 1 are stacked.
【００２０】まず、避雷器単位１について説明する。こ
の避雷器単位１は、金属製フランジで密封した碍子管１
１に内部要素１２を収納する構造としている。つまり、
碍子管１１の両端部は、パッキン１３を介して蓋１４を
被せ、この蓋１４に別のパッキン１５を介して避圧膜１
６を置き、この避圧膜１６を押え１７で挟み込んでい
る。First, the arrester unit 1 will be described. This lightning arrester unit 1 is an insulator tube 1 sealed with a metal flange.
1 has a structure in which the internal element 12 is housed. That is,
Both ends of the insulator tube 11 are covered with a lid 14 via a packing 13, and the pressure barrier film 1 is covered with another lid 15 on the lid 14.
6 is placed, and the pressure-restraining film 16 is sandwiched by the retainer 17.
【００２１】内部要素１２は、避雷器単位１の定格電圧
に見合う所定複数枚の酸化亜鉛素子１８を積層する構造
を有するが、各酸化亜鉛素子１８の間には、金属製スペ
ーサとしての金属カラー１９を挿入している。この金属
カラー１９は、酸化亜鉛素子１８と同形状に形成されて
いる。このように素子１８と金属カラー１９とを交互に
積層した積層体を、所定枚数毎に円盤状の板体としての
仕切板２０で区切っている。The internal element 12 has a structure in which a predetermined plurality of zinc oxide elements 18 corresponding to the rated voltage of the arrester unit 1 are laminated, and a metal collar 19 as a metal spacer is provided between the zinc oxide elements 18. Have been inserted. The metal collar 19 is formed in the same shape as the zinc oxide element 18. In this way, the laminated body in which the elements 18 and the metal collars 19 are alternately laminated is separated by a partition plate 20 as a disc-shaped plate body for every predetermined number of sheets.
【００２２】仕切板２０は導電性部材で成り、図３に示
すように、その中央部の上面、下面夫々に穿設された、
素子１８及び金属カラー１９を受ける凹状の溝２０ａ、
２０ａ（ガイド部）を有すると共に、その溝２０ａの周
囲の位置に後述する絶縁ロッド２１を貫通させる複数の
貫通孔を有する。この貫通孔の位置は、絶縁ロッド２１
と積層体との間の十分な気中距離を確保できる位置に設
定されている。The partition plate 20 is made of a conductive material, and as shown in FIG. 3, the partition plate 20 is formed on the upper surface and the lower surface of the central portion, respectively.
A concave groove 20a for receiving the element 18 and the metal collar 19,
20a (guide portion) and a plurality of through holes through which an insulating rod 21 to be described later penetrates at a position around the groove 20a. The position of this through hole is the insulating rod 21.
It is set at a position where a sufficient air distance between the stack and the stack can be secured.
【００２３】この仕切板２０は酸化亜鉛素子１８と金属
カラー１９とを積層した最下部にも配設し、その下方に
は、碍子管１１の内長との協調をとるため、金属管２２
を配設する。この一連の積層体の両端にも仕切板２０、
２０を夫々配設し、全部の仕切板２０，…，２０の貫通
孔に絶縁ロッド２１を通した状態で、その両端をナット
で固定することにより、内部要素１２を形成している。This partition plate 20 is also arranged at the lowermost part where the zinc oxide element 18 and the metal collar 19 are laminated, and a metal pipe 22 is provided below the partition plate 20 in order to cooperate with the inner length of the insulator pipe 11.
To arrange. Partition plates 20 are also provided at both ends of this series of laminated bodies.
The inner elements 12 are formed by disposing the respective 20 and fixing the both ends with nuts in a state where the insulating rods 21 are passed through the through holes of all the partition plates 20 ,.
【００２４】このように形成された内部要素１２は、下
側の蓋１４の金属ベース２３上に載置され、上側の蓋１
４と内部要素上端部との間にはバネ２４が介挿されてい
る。このバネ２４により、内部要素１２に圧縮荷重を与
え、碍子管１１内部に固定して収容している。The inner element 12 thus formed is placed on the metal base 23 of the lower lid 14 and the upper lid 1
A spring 24 is inserted between the upper end of the internal element 4 and the upper end of the internal element 4. A compression load is applied to the internal element 12 by the spring 24, and the internal element 12 is fixedly housed inside the insulator tube 11.
【００２５】この避雷器単位１は、図４に示すように、
３段積みにして所定の定格電圧の避雷器２を構成してい
る。なお、図４中、符号３２はシールドリングであり、
符号３３は碍子管金属部を、符号３４は抵抗体部分を夫
々示す。This lightning arrester unit 1 is, as shown in FIG.
The lightning arrester 2 having a predetermined rated voltage is formed by stacking three stages. In FIG. 4, reference numeral 32 is a shield ring,
Reference numeral 33 indicates an insulator tube metal portion, and reference numeral 34 indicates a resistor portion.
【００２６】次に、本実施例の作用効果を説明する。Next, the function and effect of this embodiment will be described.
【００２７】酸化亜鉛素子１８と金属カラー１９が交互
に積層されているため、内部要素１２を構成する抵抗体
部分３４（図４参照）が、同一定格電圧であっても、金
属カラー１９を用いない従来のものよりも長くなる。つ
まり、各避雷器単位１において、電圧を分担する距離
（高さ）範囲が碍子管１１の下方に延びると共に、碍子
管１１の内長との協調をとる金属管２２が短くて済む。
この金属管２２は、碍子管下部の金属部３３（図４参
照）と同電位である。Since the zinc oxide element 18 and the metal collar 19 are alternately laminated, even if the resistor portion 34 (see FIG. 4) forming the internal element 12 has the same rated voltage, the metal collar 19 is used. Not longer than the conventional one. That is, in each lightning arrester unit 1, the distance (height) range in which the voltage is shared extends below the insulator tube 11, and the metal tube 22 that cooperates with the inner length of the insulator tube 11 may be short.
The metal tube 22 has the same potential as the metal portion 33 (see FIG. 4) below the insulator tube.
【００２８】また、素子１８と金属カラー１９の積層体
は、各仕切板２０の溝２０ａによりセンタリングされ、
且つ、バネ２４により内部要素１２全体が押さえられて
いるので、絶縁ロッド２１，…，２１を積層体の周面に
接触させなくても、位置ずれを起こすことはない。これ
により、導通面も十分に確保される。The laminated body of the element 18 and the metal collar 19 is centered by the groove 20a of each partition plate 20,
Further, since the entire inner element 12 is pressed by the spring 24, the displacement does not occur even if the insulating rods 21, ..., 21 are not brought into contact with the peripheral surface of the laminated body. As a result, the conductive surface is sufficiently secured.
【００２９】以上の状況を踏まえて、図５、６に基づき
本実施例の電圧分担特性を説明する。図５は碍子管１１
の汚損が無いときの電圧分担特性を、図６は碍子管１１
が汚損され、その影響を受けたときの電圧分担特性を示
すもので、縦軸及び横軸のとり方は前述した図９（ｂ）
と同一である。図中、実線Ａ，Ｂ及び破線Ｃ，Ｄ並びに
電位差Ｖｅの定義付けも図９（ｂ）と同一であり、比較
し易いように同図のものをそのまま模写している。Based on the above situation, the voltage sharing characteristic of this embodiment will be described with reference to FIGS. FIG. 5 shows an insulator tube 11.
6 shows the voltage sharing characteristic when there is no contamination of the insulator tube 11
Shows the voltage sharing characteristics when it is contaminated and is affected by it, and the vertical and horizontal axes are shown in FIG. 9 (b) described above.
Is the same as In the figure, the solid lines A and B, the broken lines C and D, and the definition of the potential difference Ve are also the same as those in FIG. 9B, and those in the figure are reproduced as they are for easy comparison.
【００３０】図５における一点鎖線Ｅは汚損の影響が無
いときの、酸化亜鉛素子１８、即ち抵抗体部分３４の電
圧分担特性であり、図６における二点鎖線Ｆは汚損時の
抵抗体部分３４の電圧分担特性である。実際には、素子
１８が電圧を分担し、金属カラー１９は電圧を分担しな
いため、特性曲線Ｅ，Ｆは階段状に変化するものである
が、概略、図示の特性として差し支え無い。The dashed-dotted line E in FIG. 5 is the voltage sharing characteristic of the zinc oxide element 18, that is, the resistor portion 34 when there is no influence of pollution, and the dashed-two dotted line F in FIG. 6 is the resistor portion 34 at the time of contamination. Is a voltage sharing characteristic of. In reality, since the element 18 shares the voltage and the metal collar 19 does not share the voltage, the characteristic curves E and F change in a stepwise manner, but the characteristics shown in the figure are acceptable.
【００３１】前述したように、各避雷器単位１における
抵抗体部分３４が金属カラー１９の挿入によって下方に
延びていることから、特性曲線Ｅ，Ｆにおける各碍子管
１１の分担電圧Ｖ1 ，Ｖ2 ，Ｖ3 に到達する各点も従来
の特性（図９（ｂ））に比べ夫々、グラフ上で下方に移
動している。このため、碍子管１１と抵抗体部分３４の
電位差Ｖｆとなり、従来の電位差Ｖｅに比べて、Ｖｅ＞
Ｖｆと小さくなる。As described above, since the resistor portion 34 in each arrester unit 1 extends downward due to the insertion of the metal collar 19, the shared voltages V 1 and V 2 of the respective insulator tubes 11 in the characteristic curves E and F are shown. , V 3 also move downward in the graph as compared with the conventional characteristic (FIG. 9B). Therefore, the potential difference Vf between the insulator tube 11 and the resistor portion 34 becomes Ve, which is higher than the conventional potential difference Ve.
It becomes as small as Vf.
【００３２】さらに、各絶縁ロッド２１は素子１８及び
金属カラー１９の積層体から十分離れて位置するため、
それらの間の距離ｄo （図２参照）が大きくなる。つま
り、誘電体が電極から遠ざかるのと等価であり、電界係
数ｆは小さくなる。このように、電位差Ｖｅ＞Ｖｆ、ギ
ャップｄo ：大、及び、電界係数ｆ：小となるので、前
記（１）式から電界ストレスＥは従来構造よりも小さく
なる。Furthermore, since each insulating rod 21 is located sufficiently away from the laminated body of the element 18 and the metal collar 19,
The distance d o between them (see FIG. 2) increases. That is, it is equivalent to moving the dielectric away from the electrode, and the electric field coefficient f becomes small. Thus, since the potential difference Ve> Vf, the gap d o : large, and the electric field coefficient f: small, the electric field stress E becomes smaller than that in the conventional structure from the equation (1).
【００３３】そこで、本実施例によれば、避雷器２のサ
ージ吸収特性には何等支障を与えない状態で、避雷器２
内部の電界ストレスＥが緩和されることから、コロナ放
電の発生を的確に抑えることができる。したがって、コ
ロナ放電に起因した絶縁ロッド２１の沿面絶縁劣化を確
実に抑制でき、信頼性が向上すると共に汚損にも高い耐
性の避雷器を提供できる。Therefore, according to the present embodiment, the surge arrester 2 is provided in a state where the surge absorbing characteristics of the arrester 2 are not hindered.
Since the internal electric field stress E is relieved, the occurrence of corona discharge can be properly suppressed. Therefore, it is possible to reliably suppress the creeping insulation deterioration of the insulating rod 21 due to the corona discharge, and it is possible to provide a lightning arrester having improved reliability and high resistance to stains.
【００３４】なお、上記実施例においては酸化亜鉛素子
と金属カラーを交互に積層する構成としたが、本発明に
おける内部素子は必ずしもその構成に限定されるもので
はなく、例えば酸化亜鉛素子の２個置きに１個の金属カ
ラーを挿入するなど、サージ特性に応じて変えてもよ
い。また、耐汚損形避雷器を構成する避雷器単位の数は
任意である。さらに、板体としての仕切板に設けるガイ
ド部は、実施例記載のように溝構造である必要は無く、
反対に凸状であってもよい。In the above embodiment, the zinc oxide element and the metal collar are alternately laminated, but the internal element in the present invention is not necessarily limited to that structure. For example, two zinc oxide elements are used. It may be changed depending on the surge characteristics, for example, by inserting one metal collar every other place. Further, the number of lightning arrester units constituting the pollution-proof lightning arrester is arbitrary. Further, the guide portion provided on the partition plate as the plate body does not need to have the groove structure as described in the embodiments,
On the contrary, it may be convex.
【００３５】[0035]
【発明の効果】以上説明したように、本発明に係る避雷
器では、積層した酸化亜鉛素子の間に金属製スペーサを
挿入した内部要素とすると共に、内部要素を仕切る板体
には、その内部要素における積層体の積層方向の位置を
固定するガイド部を設け、固定用の絶縁ロッドを上記積
層体から一定の気中距離を隔てた位置で上記板板に貫通
させた構造にしたため、板体のガイド部が積層体の積層
方向の位置決を行って、積層体全体を確実にセンタリン
グできる。一方、絶縁ロッドはその位置決めの機能から
解放され、内部要素の積層方向の固定に専念でき、積層
体の側面から一定距離だけ離され、内部要素の抵抗部分
と絶縁ロッドとの間の電界係数が小さくなると共に、酸
化亜鉛素子群が担う抵抗部分が金属製スペーサの挿入に
より積層方向に延び、その抵抗部分の下端部と碍子管と
の電位差が、金属製スペーサを挿入しない場合よりも低
下することから、避雷器内部の電界ストレスが格段に低
下し、内部コロナの発生に伴う絶縁劣化が抑制された、
信頼性の高い耐汚損形の避雷器を提供することができ
る。As described above, in the lightning arrester according to the present invention, an internal element is formed by inserting a metal spacer between the stacked zinc oxide elements, and the plate body partitioning the internal element is provided with the internal element. A guide part for fixing the position in the stacking direction of the laminated body in is provided, and since the fixing insulating rod is made to penetrate the plate at a position separated from the laminated body by a certain air distance, The guide portion positions the stacked body in the stacking direction, so that the entire stacked body can be reliably centered. On the other hand, the insulating rod is released from its positioning function and can be dedicated to fixing the inner element in the stacking direction, and is separated from the side surface of the stack by a certain distance, and the electric field coefficient between the resistive portion of the inner element and the insulating rod is As the size of the resistor decreases, the resistance part of the zinc oxide element group extends in the stacking direction due to the insertion of the metal spacer, and the potential difference between the lower end of the resistance part and the insulator tube becomes lower than when the metal spacer is not inserted. Therefore, the electric field stress inside the lightning arrester was drastically reduced, and the insulation deterioration due to the generation of internal corona was suppressed.
It is possible to provide a highly reliable stain-proof type lightning arrester.
【図１】本発明に係る避雷器単位の一例を示す、一部省
略した軸方向断面図。FIG. 1 is a partially omitted axial sectional view showing an example of a lightning arrester unit according to the present invention.
【図２】図１中のＡ−Ａ線に沿った断面図。FIG. 2 is a sectional view taken along the line AA in FIG.
【図３】図１中の仕切板付近の拡大断面図。FIG. 3 is an enlarged cross-sectional view near a partition plate in FIG.
【図４】本発明に係る避雷器単位を段積みにした耐汚損
形避雷器の一例を示す、一部省略した軸方向断面図。FIG. 4 is a partially omitted axial cross-sectional view showing an example of a pollution-proof lightning arrester in which lightning arrester units according to the present invention are stacked.
【図５】汚損の影響が無いときの電圧分担特性図。FIG. 5 is a voltage sharing characteristic diagram when there is no influence of pollution.
【図６】汚損の影響が有るときの電圧分担特性図。FIG. 6 is a voltage sharing characteristic diagram when there is an influence of pollution.
【図７】従来の避雷器単位の一例を示す、一部省略した
軸方向断面図。FIG. 7 is a partially omitted axial sectional view showing an example of a conventional lightning arrester unit.
【図８】図７中のＢ−Ｂ線に沿った断面図。8 is a cross-sectional view taken along the line BB in FIG.
【図９】従来の耐汚損形避雷器の軸方向断面構造と電圧
分担特性を説明する説明図。FIG. 9 is an explanatory diagram illustrating an axial cross-sectional structure and a voltage sharing characteristic of a conventional pollution-proof lightning arrester.
１ 避雷器単位 ２ 耐汚損形避雷器 １１ 碍子管 １２ 内部要素 １３ パッキン １４ 蓋 １７ 抑え １８ 酸化亜鉛素子 １９ 金属カラー ２０ 仕切板 ２０ａ 溝 ２１ 絶縁ロッド ２２ 金属管 1 Lightning Arrestor Unit 2 Antifouling Type Lightning Arrester 11 Insulator Tube 12 Internal Element 13 Packing 14 Lid 17 Suppression 18 Zinc Oxide Element 19 Metal Collar 20 Partition Plate 20a Groove 21 Insulation Rod 22 Metal Tube
Claims (1)
鉛素子群と、この酸化亜鉛素子群の積層方向の一方の端
部に設けた金属管と、上記酸化亜鉛素子群の所定位置に
挿入すると共に上記素子群と金属管から成る要素の両端
部に設けた複数の導電性の板体と、この複数の板体を貫
通して配置され上記要素及び板体全体を固定する絶縁ロ
ッドとを有して内部要素を形成し、この内部要素を、両
端を金属製フランジで密封した磁器製の碍子管内に収納
して避雷器単位を形成し、この避雷器単位の複数個を直
列に段積みにした構造を備えた避雷器において、前記酸
化亜鉛素子の積層間の所定位置に金属製スペーサを挿入
すると共に、前記板体には、前記内部要素を成す積層体
の積層方向の位置を固定するガイド部を設け、前記絶縁
ロッドを上記積層体から一定の気中距離を隔てた位置で
上記板体に貫通させたことを特徴とする避雷器。Claims: 1. A zinc oxide element group in which a plurality of zinc oxide elements are laminated, a metal tube provided at one end of the zinc oxide element group in the laminating direction, and the zinc oxide element. A plurality of electrically conductive plate bodies that are inserted at predetermined positions of the group and are provided at both ends of the element group and the element composed of the metal tube, and the element and the entire plate body that are arranged to penetrate through the plurality of plate bodies. An insulating rod to be fixed is formed to form an internal element, and the internal element is housed in a porcelain insulator tube whose both ends are sealed with metal flanges to form a lightning arrester unit. In a lightning arrester having a structure stacked in series, a metal spacer is inserted at a predetermined position between the stacks of the zinc oxide elements, and the plate body is positioned in the stacking direction of the stack body forming the internal element. A guide part for fixing the Arrester is characterized in that by penetrating into the plate member rod at a position spaced a certain air intermediate distance from the laminate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3164699A JP2744149B2 (en) | 1991-07-04 | 1991-07-04 | Surge arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3164699A JP2744149B2 (en) | 1991-07-04 | 1991-07-04 | Surge arrester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0513142A true JPH0513142A (en) | 1993-01-22 |
| JP2744149B2 JP2744149B2 (en) | 1998-04-28 |
Family
ID=15798195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3164699A Expired - Fee Related JP2744149B2 (en) | 1991-07-04 | 1991-07-04 | Surge arrester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2744149B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004051813A1 (en) * | 2002-12-02 | 2004-06-17 | Young-Ki Chung | Bipolar discharge-dissipation lightning air terminals |
| JP2010016237A (en) * | 2008-07-04 | 2010-01-21 | Otowa Denki Kogyo Kk | Lightening arrester |
| US9145334B2 (en) | 2011-09-22 | 2015-09-29 | Fina Technology, Inc. | Isocyanate-free insulated glass sealant and insulated glass units using the same |
| JP2016537826A (en) * | 2013-09-30 | 2016-12-01 | シーメンス アクチエンゲゼルシヤフトＳｉｅｍｅｎｓ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ | Surge arrester |
| WO2021038976A1 (en) * | 2019-08-30 | 2021-03-04 | 株式会社明電舎 | Surge arrester |
| WO2023281561A1 (en) * | 2021-07-05 | 2023-01-12 | 株式会社東芝 | Lightning arrester |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4089262B2 (en) * | 2002-04-01 | 2008-05-28 | 株式会社明電舎 | Lightning arrestor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6132373A (en) * | 1984-07-23 | 1986-02-15 | 株式会社東芝 | Arrester |
-
1991
- 1991-07-04 JP JP3164699A patent/JP2744149B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6132373A (en) * | 1984-07-23 | 1986-02-15 | 株式会社東芝 | Arrester |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004051813A1 (en) * | 2002-12-02 | 2004-06-17 | Young-Ki Chung | Bipolar discharge-dissipation lightning air terminals |
| JP2010016237A (en) * | 2008-07-04 | 2010-01-21 | Otowa Denki Kogyo Kk | Lightening arrester |
| US9145334B2 (en) | 2011-09-22 | 2015-09-29 | Fina Technology, Inc. | Isocyanate-free insulated glass sealant and insulated glass units using the same |
| JP2016537826A (en) * | 2013-09-30 | 2016-12-01 | シーメンス アクチエンゲゼルシヤフトＳｉｅｍｅｎｓ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ | Surge arrester |
| WO2021038976A1 (en) * | 2019-08-30 | 2021-03-04 | 株式会社明電舎 | Surge arrester |
| JP2021036571A (en) * | 2019-08-30 | 2021-03-04 | 株式会社明電舎 | Lightning arrester |
| KR20220038499A (en) * | 2019-08-30 | 2022-03-28 | 메이덴샤 코포레이션 | lightning arrester |
| WO2023281561A1 (en) * | 2021-07-05 | 2023-01-12 | 株式会社東芝 | Lightning arrester |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2744149B2 (en) | 1998-04-28 |
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