EP0274674A1 - Process for manufacturing a lightning arrester, and lightning arrester obtained by this process - Google Patents

Process for manufacturing a lightning arrester, and lightning arrester obtained by this process Download PDF

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Publication number
EP0274674A1
EP0274674A1 EP87118254A EP87118254A EP0274674A1 EP 0274674 A1 EP0274674 A1 EP 0274674A1 EP 87118254 A EP87118254 A EP 87118254A EP 87118254 A EP87118254 A EP 87118254A EP 0274674 A1 EP0274674 A1 EP 0274674A1
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EP
European Patent Office
Prior art keywords
core
manufacturing
pellets
fittings
lightning arrester
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Granted
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EP87118254A
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German (de)
French (fr)
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EP0274674B1 (en
Inventor
René Parraud
Denis Thuillier
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Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA
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Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA
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Priority to AT87118254T priority Critical patent/ATE63399T1/en
Publication of EP0274674A1 publication Critical patent/EP0274674A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49087—Resistor making with envelope or housing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49101—Applying terminal

Definitions

  • the present invention relates to a method of manufacturing a lightning arrester.
  • a surge arrester is a device which is placed between the phase and the ground of a high-voltage line and which makes it possible to limit the amplitude and the duration of atmospheric overvoltages (shock due to lightning and induction phenomena in conductors) , or temporary electrical overvoltages in the network (operating shock).
  • a surge arrester The functions of a surge arrester are therefore on the one hand to permanently support the nominal operating voltage, and on the other hand to drain the strong discharge current appearing during a temporary overvoltage, so as to protect the equipment from the line (transformers ).
  • a core made of a varistor type material based for example on zinc oxide ZnO, the electrical resistivity of which is highly non-linear as a function of the applied voltage.
  • European patent application EP-A-0196 370 discloses a lightning arrester structure comprising a central core of varistor type material, two end fittings threaded and glued to the ends of the side wall of said core, with two intermediate spring blades between the bases of this core and the fitting; an insulating coating with fins is provided around the side wall of the assembly.
  • Such a structure has drawbacks because it involves on the one hand a machining of the ends of the core, machining which risks damaging it, creating cracks or fractures, and on the other hand a bonding of the fittings which can disturb their contact electric with the ends of the core.
  • a lightning arrester the central core of which comprises several cylindrical pellets stacked in varistor-type material, two extreme fittings being in contact with the pellets by means of blades. springs; this assembly is mechanically linked by a unitary sheath made of a heat-shrinkable material. Such a method is difficult to implement and therefore expensive.
  • the object of the present invention is to simplify the manufacture of lightning arresters and to reduce their cost.
  • the subject of the present invention is a method of manufacturing a lightning arrester comprising a central core of substantially revolution shape comprising at least one varistor, two extreme metal fittings and a side casing of electrically insulating material, characterized in that said metal fittings are overmolded on the metallized ends of said central core and then said lateral envelope, selected from composite material, is overmolded on said core and at least a portion of said fittings.
  • composite materials means elastomers, EPDM, silicones, etc. and resins, loaded or not (epoxy resin, etc.).
  • the metal of said fittings is such that its melting temperature is of the order of 400 ° C; these are for example zinc, lead, tin, aluminum and their alloys, such as Zamak.
  • the fittings are directly overmolded on its ends.
  • the overmolding of the fittings allows the production of a unitary assembly, and the overmolded coating fills the gaps between these bars.
  • This joining of the stack can be carried out for example by thermocompression by inserting a thickness of metal between two faces in contact and by applying a high pressure at high temperature. It can also be carried out in a simple manner by casting or injection of metal between the facing faces of the pellets placed in a mold.
  • a core 1 of a varistor type material for example based on zinc oxide.
  • This core has a generally cylindrical shape with axis 4 with two end faces 2 and 3 provided with a metallization layer; it is not necessary that this shape is regular, nor that the faces 2 and 3 are perfectly flat and orthogonal to the axis 4.
  • the metal fittings 5 and 6 are in fact produced by overmolding on the ends of the core 1 , which allows good electrical contact to be obtained between the ends of the core 1 and these fittings.
  • a material chosen from zinc and its alloys, aluminum and its alloys, etc. can be used for these fittings.
  • the core with a total height of approximately 180 mm could be compatible with a nominal operating voltage of 20 kvolts, and with a cross section of approximately 900 mm2, to allow the flow of '' a current wave of more than 40 KAmps for four tenths of a microsecond.
  • the core 1 of FIG. 1 can be formed of several bars of smaller cross section, as appears in FIGS. 2a and 2b where seven bars 10 based on zinc oxide are regularly illustrated around a axis 14.
  • the cross section of the entire these bars is equivalent to the section provided above for a unitary core; the lengths can be substantially the same for the embodiments of FIGS. 1 and 2a.
  • Fittings 15 and 16 are overmolded on the at least partially metallized ends of the bars 10, and the elastomer coating 17 is then produced, also by overmolding, this material filling the intervals between the bars 10.
  • FIG 3 there is a surge arrester with elements identical to those of Figure 1, except for the central core. It is formed in this variant of a plurality of pellets 21, 22, 23, 24 based on zinc oxide, for example of the same section as the core 1, and whose stack has the same length as the core 1. This stack is stiffened by a connection of the faces in contact by thermocompression. For this, a very thin thickness of fusible metal is introduced between two pellets. Mechanical compression of the assembly combined with heat treatment makes it possible to obtain a very good mechanical bond.
  • metal is a material with a relatively low melting point like zinc; the pressure is around 1 kg / mm2, and the temperature around 400 ° C.
  • the assembly process continues as for core 1 in FIG. 1.
  • FIG. 4 a variant of connection of the pads 21, 22, 23, 24 is shown to produce the central core.
  • metal melting at low temperature, such as zinc, Zamak, or lead, so as to create metallic bonds. 31, 32, 33. This coating ensures both the electrical contact and the mechanical connection between the pellets.

Abstract

A double molded over method of manufacturing a lightning arrester in which a central core 1 is made of zinc oxide in a first step, then two metal end fittings 5, 6 are molded onto the end faces and over the side thereof, and finally a coating of elastomer material 7 is molded around the side wall of the central core and over side portions of the end fittings. The core may be formed of a plurality of smaller section bars of zinc oxide regularly disposed about a longitudinal axis with the end fittings molded onto the end faces and about the sides of the end bars whose end faces are partially metallized. In a further variant, a stack of zinc oxide based pellets having the same cross-sectional area as the core in the first example, with the stack having the same overall length as the core if stiffened by thermal compression with fusible metal inserted between pairs of pellets. The stack assembly is then compressed mechanically in conjunction with heat treatment to effect very good mechanical bonding. The core assembly formed thereby is treated as above.

Description

La présente invention concerne un procédé de fabrication d'un parafoudre.The present invention relates to a method of manufacturing a lightning arrester.

Un parafoudre est un dispositif qui est placé entre la phase et la masse d'une ligne haute-tension et qui permet de limiter l'amplitude et la durée des surtensions atmosphériques (choc dû à la foudre et phénomènes d'induction dans les conducteurs), ou des surtensions électriques temporaires du réseau (choc de manoeuvre).A surge arrester is a device which is placed between the phase and the ground of a high-voltage line and which makes it possible to limit the amplitude and the duration of atmospheric overvoltages (shock due to lightning and induction phenomena in conductors) , or temporary electrical overvoltages in the network (operating shock).

Les fonctions d'un parafoudre sont donc d'une part de supporter en permanence la tension nominale de service, et d'autre part d'écouler le fort courant de décharge apparaissant lors d'une surtension temporaire, de façon à protéger les appareillages de la ligne (transformateurs...).The functions of a surge arrester are therefore on the one hand to permanently support the nominal operating voltage, and on the other hand to drain the strong discharge current appearing during a temporary overvoltage, so as to protect the equipment from the line (transformers ...).

Ces fonctions sont généralement assurées par une âme en un matériau du type varistance à base par exemple d'oxyde de zinc ZnO, dont la résistivité électrique est fortement non linéaire en fonction de la tension appliquée.These functions are generally provided by a core made of a varistor type material based for example on zinc oxide ZnO, the electrical resistivity of which is highly non-linear as a function of the applied voltage.

Cette caractéristique de non linéarité permet à un tel parafoudre de laisser passer :
- Un courant faible (par exemple de l'ordre de 0.5 mA/cm2) lorsque la tension de service est appliquée de façon permanente au parafoudre qui présente alors une résistance très grande. Ce courant est essentiellement d'origine capacitive puisque la permittivité relative de telles varistances est très élevée.
- Un courant fort, pouvant atteindre plusieurs dizaines de kiloampères, lorsque la tension appliquée atteint un seuil d'amorçage à partir duquel la résistance des varistances devient très faible.This characteristic of non-linearity allows such a surge arrester to let pass:
- A low current (for example of the order of 0.5 mA / cm2) when the operating voltage is permanently applied to the surge arrester which then has very high resistance. This current is essentially of capacitive origin since the relative permittivity of such varistors is very high.
- A strong current, which can reach several tens of kiloamperes, when the applied voltage reaches a starting threshold from which the resistance of the varistors becomes very low.

On connaît par la demande de brevet européen EP-A-0196 370 une structure de parafoudre comportant une âme centrale en matériau de type varistance, deux ferrures extrêmes filetées et collées sur les extrémités de la paroi latérale de ladite âme, avec deux lames ressorts intermédiaires entre les bases de cette âme et la ferrure ; un revêtement isolant à ailettes est prévu autour de la paroi latérale de l'ensemble. Une telle structure présente des inconvénients car elle implique d'une part un usinage des extrémités de l'âme, usinage qui risque de l'endommager, en créant des fissures ou des fractures, et d'autre part un collage des ferrures qui peut perturber leur contact électrique avec les extrémités de l'âme.European patent application EP-A-0196 370 discloses a lightning arrester structure comprising a central core of varistor type material, two end fittings threaded and glued to the ends of the side wall of said core, with two intermediate spring blades between the bases of this core and the fitting; an insulating coating with fins is provided around the side wall of the assembly. Such a structure has drawbacks because it involves on the one hand a machining of the ends of the core, machining which risks damaging it, creating cracks or fractures, and on the other hand a bonding of the fittings which can disturb their contact electric with the ends of the core.

On connaît également par la demande de brevet britannique GB-A-2 073 965 un parafoudre dont l'âme centrale comprend plusieurs pastilles cylindriques empilées en matériau de type varistance, deux ferrures extrêmes étant en contact avec les pastilles par l'intermé­diaire de lames de ressorts ; cet ensemble est lié mécaniquement par une gaine unitaire en un matériau thermorétractable. Un tel procédé est difficile à mettre en oeuvre et par conséquent coûteux.Also known from British patent application GB-A-2,073,965 is a lightning arrester, the central core of which comprises several cylindrical pellets stacked in varistor-type material, two extreme fittings being in contact with the pellets by means of blades. springs; this assembly is mechanically linked by a unitary sheath made of a heat-shrinkable material. Such a method is difficult to implement and therefore expensive.

La présente invention a pour but de simplifier la fabrication des parafoudres et d'en réduire le coût.The object of the present invention is to simplify the manufacture of lightning arresters and to reduce their cost.

La présente invention a pour objet un procédé de fabrication d'un parafoudre comprenant une âme centrale de forme sensiblement de révolution comportant au moins une varistance, deux ferrures métalliques extrêmes et une enveloppe latérale en matériau électriquement isolant, caractérisé par le fait que lesdites ferrures métalliques sont surmoulées sur les extrémités métallisées de ladite âme centrale et que l'on surmoule ensuite ladite enveloppe latérale, choisie en matériau composite, sur ladite âme et au moins une portion desdites ferrures.The subject of the present invention is a method of manufacturing a lightning arrester comprising a central core of substantially revolution shape comprising at least one varistor, two extreme metal fittings and a side casing of electrically insulating material, characterized in that said metal fittings are overmolded on the metallized ends of said central core and then said lateral envelope, selected from composite material, is overmolded on said core and at least a portion of said fittings.

On entend par matériaux composites, les élastomères, l'EPDM, les silicones,...et les résines chargées ou non (résine époxy...).The term “composite materials” means elastomers, EPDM, silicones, etc. and resins, loaded or not (epoxy resin, etc.).

Le métal desdites ferrures est tel que sa température de fusion soit de l'ordre de 400°C ; il s'agit par exemple du zinc, du plomb, de l'étain, l'aluminium et de leurs alliages, tel que le Zamak.The metal of said fittings is such that its melting temperature is of the order of 400 ° C; these are for example zinc, lead, tin, aluminum and their alloys, such as Zamak.

Si l'âme centrale est unitaire, on réalise directement le surmoulage des ferrures sur ses extrémités.If the central core is unitary, the fittings are directly overmolded on its ends.

Si elle est composée de plusieurs barreaux sensiblement de révolution et de même longueur, montés en parallèle, le surmoulage des ferrures permet la réalisation d'un ensemble unitaire, et le revêtement surmoulé comble les vides entre ces barreaux.If it is composed of several bars substantially of revolution and of the same length, mounted in parallel, the overmolding of the fittings allows the production of a unitary assembly, and the overmolded coating fills the gaps between these bars.

Si elle est composée de plusieurs pastilles superposées, il convient de la rigidifier préalablement, indépendamment des ferrures extrêmes, ce qui constitue une simplification considérable des procédés antérieurs. Cette solidarisation de l'empilement peut être réalisée par exemple par thermocompression en insérant une épaisseur de métal entre deux faces en contact et en appliquant une forte pression à température élevée. Elle peut être également effectuée de manière simple par coulée ou injection de métal entre les faces en regard des pastilles disposées dans un moule.If it is composed of several superimposed pads, it should be stiffened beforehand, independently of the end fittings, which constitutes a considerable simplification of the prior methods. This joining of the stack can be carried out for example by thermocompression by inserting a thickness of metal between two faces in contact and by applying a high pressure at high temperature. It can also be carried out in a simple manner by casting or injection of metal between the facing faces of the pellets placed in a mold.

D'autres caractéristiques et avantages de la présente invention apparaîtront au cours de la description suivante de modes de réalisation donnés à titre illustratif, mais nullement limitatif.Other characteristics and advantages of the present invention will appear during the following description of embodiments given by way of illustration, but in no way limiting.

Dans le dessin annexé :

  • - La figure 1 montre schématiquement en coupe longitudinale un parafoudre selon l'invention à varistance unique.
  • - La figure 2A montre schématiquement en coupe longitudinale un parafoudre selon l'invention à plusieurs varistances juxtaposées.
  • - La figure 2B est une coupe transversale selon la ligne II-II de la figure 2A.
  • - Les figures 3 et 4 montrent schématiquement en coupe longitudinale deux variantes de parafoudre selon l'invention à plusieurs varistances superposées.
In the attached drawing:
  • - Figure 1 shows schematically in longitudinal section a surge arrester according to the invention with a single varistor.
  • - Figure 2A shows schematically in longitudinal section a surge arrester according to the invention with several juxtaposed varistors.
  • - Figure 2B is a cross section along the line II-II of Figure 2A.
  • - Figures 3 and 4 schematically show in longitudinal section two variants of surge arrester according to the invention with several superimposed varistors.

On voit dans la figure 1, une âme 1 en un matériau de type varistance, par exemple à base d'oxyde de zinc. Cette âme présente une forme générale cylindrique d'axe 4 avec deux faces extrêmes 2 et 3 munies d'une couche de métallisation ; il n'est pas nécessaire que cette forme soit régulière, ni que les faces 2 et 3 soient parfaitement planes et orthogonales à l'axe 4. On réalise en effet les ferrures métalliques 5 et 6 par surmoulage sur les extrémités de l'âme 1, ce qui permet d'obtenir un bon contact électrique entre les extrémités de l'âme 1 et ces ferrures. On peut utiliser pour ces ferrures un matériau choisi parmi le zinc et ses alliages, l'aluminium et ses alliages etc.We see in Figure 1, a core 1 of a varistor type material, for example based on zinc oxide. This core has a generally cylindrical shape with axis 4 with two end faces 2 and 3 provided with a metallization layer; it is not necessary that this shape is regular, nor that the faces 2 and 3 are perfectly flat and orthogonal to the axis 4. The metal fittings 5 and 6 are in fact produced by overmolding on the ends of the core 1 , which allows good electrical contact to be obtained between the ends of the core 1 and these fittings. A material chosen from zinc and its alloys, aluminum and its alloys, etc. can be used for these fittings.

On réalise ensuite par surmoulage un revêtement à ailettes 7, par exemple en élastomère, comme l'EPDM, qui recouvre toute la face latérale de l'âme 1 et une portion latérale de chaque ferrure 5 et 6.A finned coating 7, for example made of an elastomer, such as EPDM, is then produced by overmolding, which covers the entire lateral face of the core 1 and a lateral portion of each fitting 5 and 6.

A titre d'exemple, l'âme d'une hauteur totale d'environ 180 mm, pourrait être compatible avec une tension nominale de service de 20 kvolts, et d'une section transversale de 900 mm2 environ, pour permettre l'écoulement d'une onde de courant de plus de 40 KAmpères pendant quatre dizièmes de microseconde.For example, the core with a total height of approximately 180 mm, could be compatible with a nominal operating voltage of 20 kvolts, and with a cross section of approximately 900 mm2, to allow the flow of '' a current wave of more than 40 KAmps for four tenths of a microsecond.

L'âme 1 de la figure 1 peut être formée de plusieurs barreaux de section plus faible, comme cela apparaît dans les figures 2a et 2b où l'on a illustré sept barreaux 10 à base d'oxyde de zinc régulièrement disposés autour d'un axe 14. La section transversale de la totalité de ces barreaux est équivalente à la section prévue ci-dessus pour une âme unitaire ; les longueurs peuvent être sensiblement les mêmes pour les réalisations des figures 1 et 2a. On surmoule des ferrures 15 et 16 sur les extrémités au moins partielle­ment métallisées des barreaux 10, et on réalise ensuite, également par surmoulage, le revêtement en élastomère 17, ce matériau comblant les intervalles entres les barreaux 10.The core 1 of FIG. 1 can be formed of several bars of smaller cross section, as appears in FIGS. 2a and 2b where seven bars 10 based on zinc oxide are regularly illustrated around a axis 14. The cross section of the entire these bars is equivalent to the section provided above for a unitary core; the lengths can be substantially the same for the embodiments of FIGS. 1 and 2a. Fittings 15 and 16 are overmolded on the at least partially metallized ends of the bars 10, and the elastomer coating 17 is then produced, also by overmolding, this material filling the intervals between the bars 10.

Dans la figure 3, on retrouve un parafoudre avec des éléments identiques à ceux de la figure 1, sauf en ce qui concerne l'âme centrale. Elle est formée dans cette variante d'une pluralité de pastilles 21, 22, 23, 24 à base d'oxyde de zinc, par exemple de même section que l'âme 1, et dont l'empilement présente la même longueur que l'âme 1. Cet empilement est rigidifié par une liaison des faces en contact par thermocompression. Pour cela on introduit entre deux pastilles une épaisseur 20 très mince de métal fusible. Une compression mécanique de l'ensemble associée à un traitement thermique permet d'obtenir une très bonne liaison mécanique.In Figure 3, there is a surge arrester with elements identical to those of Figure 1, except for the central core. It is formed in this variant of a plurality of pellets 21, 22, 23, 24 based on zinc oxide, for example of the same section as the core 1, and whose stack has the same length as the core 1. This stack is stiffened by a connection of the faces in contact by thermocompression. For this, a very thin thickness of fusible metal is introduced between two pellets. Mechanical compression of the assembly combined with heat treatment makes it possible to obtain a very good mechanical bond.

A titre d'exemple le métal est un matériau à relativement bas point de fusion comme le zinc ; la pression est de l'ordre de 1kg/mm2, et la température de l'ordre de 400°C. Lorsque l'âme centrale est réalisée, le procédé de montage se poursuit comme pour l'âme 1 de la figure 1.For example, metal is a material with a relatively low melting point like zinc; the pressure is around 1 kg / mm2, and the temperature around 400 ° C. When the central core is produced, the assembly process continues as for core 1 in FIG. 1.

Dans la figure 4, on montre une variante de liaison des pastilles 21, 22, 23, 24 pour réaliser l'âme centrale. On place ces pastilles dans un moule avec un léger espace entre deux faces en regard et on coule (ou on injecte) du métal fondant à basse température, tel que du zinc, du Zamak, ou du plomb, de manière à créer des liaisons métalliques 31, 32, 33. Cet enrobage assure à la fois le contact électrique et la solidarisation mécanique entre les pastilles.In FIG. 4, a variant of connection of the pads 21, 22, 23, 24 is shown to produce the central core. We place these pellets in a mold with a slight space between two opposite faces and we pour (or we inject) metal melting at low temperature, such as zinc, Zamak, or lead, so as to create metallic bonds. 31, 32, 33. This coating ensures both the electrical contact and the mechanical connection between the pellets.

Les variantes précédemment décrites sont de mise en oeuvre aisée. Mais on pourra utiliser d'autres moyens pour rigidifier l'empilement de pastilles de manière à obtenir un élément sur lequel on puisse surmouler des ferrures et un revêtement.The previously described variants are easy to implement. However, other means could be used to stiffen the stack of pellets so as to obtain an element on which fittings and a coating can be molded.

Claims (9)

1/ Procédé de fabrication d'un parafoudre comprenant une âme centrale de forme sensiblement de révolution comportant au moins une varistance, deux ferrures métalliques extrêmes et une enveloppe latérale en matériau électriquement isolant, caractérisé par le fait que lesdites ferrures métalliques (5, 6)sont surmoulées sur les extrémités (2, 3) au moins partiellement métallisées de ladite âme centrale (1) et que l'on surmoule ensuite ladite enveloppe latérale (7), choisie en matériau composite, sur ladite âme (1) et au moins une portion desdites ferrures (5, 6).1 / Method for manufacturing a lightning arrester comprising a central core of substantially revolutionary shape comprising at least one varistor, two extreme metal fittings and a side casing made of electrically insulating material, characterized in that said metal fittings (5, 6) are overmolded on the ends (2, 3) at least partially metallized of said central core (1) and that said lateral envelope (7), chosen from composite material, is then molded onto said core (1) and at least one portion of said fittings (5, 6). 2/ Procédé de fabrication d'un parafoudre selon la revendication 1, caractérisé par le fait que ladite âme est constituée par plusieurs barreaux (10), sensiblement de révolution, montés en parallèle.2 / A method of manufacturing a arrester according to claim 1, characterized in that said core is constituted by several bars (10), substantially of revolution, mounted in parallel. 3/ Procédé de fabrication d'un parafoudre selon la revendication 1, caractérisé par le fait que ladite âme est constituée par un empilement de plusieurs pastilles (22) que l'on solidarise préalablement auxdits surmoulages.3 / A method of manufacturing a surge arrester according to claim 1, characterized in that said core is constituted by a stack of several pellets (22) which are secured prior to said overmolding. 4/ Procédé de fabrication selon la revendication 3, caractérisé par le fait que la solidarisation desdites pastilles (22) superposées est obtenue par thermocompression.4 / A manufacturing method according to claim 3, characterized in that the joining of said superimposed pellets (22) is obtained by thermocompression. 5/ Procédé de fabrication selon la revendication 3, caractérisé par le fait que la solidarisation desdites pastilles superposées (22) est obtenue par coulée ou injection de métal à bas point de fusion (32) entre les pastilles disposées dans un moule.5 / A manufacturing method according to claim 3, characterized in that the joining of said superimposed pellets (22) is obtained by casting or injection of metal with a low melting point (32) between the pellets placed in a mold. 6/ Procédé de fabrication selon l'une des revendications précédentes, caractérisé par le fait que ledit matériau composite est choisi parmi les élastomères, l'EPDM, les silicones, et les résines chargées ou non telles que l'époxy.6 / manufacturing method according to one of the preceding claims, characterized in that said composite material is chosen from elastomers, EPDM, silicones, and resins loaded or not such as epoxy. 7/ Procédé selon l'une des revendications précédentes, caractérisé par le fait que ladite varistance est à base d'oxyde de zinc.7 / Method according to one of the preceding claims, characterized in that said varistor is based on zinc oxide. 8/ Procédé selon l'une des revendications précédentes, caractérisé par le fait que le matériau desdites ferrures (5, 6) est choisi parmi les métaux à bas point de fusion tels que le plomb, l'aluminium, l'étain, le zinc et leurs alliages.8 / Method according to one of the preceding claims, characterized in that the material of said fittings (5, 6) is chosen from metals with low melting point such as lead, aluminum, tin, zinc and their alloys. 9/ Parafoudre obtenu par le procédé selon l'une des revendications précédentes.9 / Lightning arrester obtained by the method according to one of the preceding claims.
EP87118254A 1986-12-12 1987-12-09 Process for manufacturing a lightning arrester, and lightning arrester obtained by this process Expired - Lifetime EP0274674B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87118254T ATE63399T1 (en) 1986-12-12 1987-12-09 METHOD OF MAKING A LIGHTNING ROD AND LIGHTNING ROD MANUFACTURED BY THIS METHOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8617424 1986-12-12
FR8617424 1986-12-12

Publications (2)

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EP0274674A1 true EP0274674A1 (en) 1988-07-20
EP0274674B1 EP0274674B1 (en) 1991-05-08

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EP87118254A Expired - Lifetime EP0274674B1 (en) 1986-12-12 1987-12-09 Process for manufacturing a lightning arrester, and lightning arrester obtained by this process

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US (1) US4833438A (en)
EP (1) EP0274674B1 (en)
JP (1) JP2628664B2 (en)
AT (1) ATE63399T1 (en)
AU (1) AU592246B2 (en)
BR (1) BR8706753A (en)
CA (1) CA1315963C (en)
DE (1) DE3769955D1 (en)
ES (1) ES2022282B3 (en)
GR (1) GR3002390T3 (en)
NO (1) NO170790C (en)

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EP0406099A1 (en) * 1989-06-30 1991-01-02 Sediver, Societe Europeenne D'isolateurs En Verre Et Composite Alternating current power line insulator with a protective spark arrester
WO2013103494A1 (en) * 2011-12-14 2013-07-11 Tyco Electronics Corporation High amperage surge arresters comprising monlithic bars varistor and heat sink thermal transfert system

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JP2734661B2 (en) * 1989-07-25 1998-04-02 株式会社明電舎 Manufacturing method of lightning arrester
FR2698736B1 (en) * 1992-11-27 1995-03-17 Soule Sa Improvements to varistor surge arresters especially for high voltage.
DE4319986A1 (en) * 1993-06-11 1994-12-15 Siemens Ag Surge arresters
SE9303274D0 (en) 1993-10-07 1993-10-07 Astra Ab Novel phenylethyl and phenylproplamines
US5712757A (en) * 1996-06-27 1998-01-27 Raychem Corporation Surge arrester having ridged terminals
US5680289A (en) * 1996-06-27 1997-10-21 Raychem Corporation Surge arrester
US5757604A (en) * 1996-06-27 1998-05-26 Raychem Corporation Surge arrester having grooved and ridged terminals
US5930102A (en) * 1997-10-08 1999-07-27 Joslyn Manufacturing Co. Surge arrester having single surge arresting block
US6519129B1 (en) 1999-11-02 2003-02-11 Cooper Industries, Inc. Surge arrester module with bonded component stack
US6279811B1 (en) 2000-05-12 2001-08-28 Mcgraw-Edison Company Solder application technique
US7015786B2 (en) * 2001-08-29 2006-03-21 Mcgraw-Edison Company Mechanical reinforcement to improve high current, short duration withstand of a monolithic disk or bonded disk stack
US7436283B2 (en) * 2003-11-20 2008-10-14 Cooper Technologies Company Mechanical reinforcement structure for fuses
US8117739B2 (en) * 2004-01-23 2012-02-21 Cooper Technologies Company Manufacturing process for surge arrester module using pre-impregnated composite
US7075406B2 (en) * 2004-03-16 2006-07-11 Cooper Technologies Company Station class surge arrester
US7633737B2 (en) * 2004-04-29 2009-12-15 Cooper Technologies Company Liquid immersed surge arrester
US7660093B2 (en) 2007-11-20 2010-02-09 Hubbell Incorporated Arrester block module assembly and method
CN105765670B (en) * 2013-11-05 2018-09-28 Abb瑞士股份有限公司 With the arrester for moulding full skirt and for the device of molding
US10741313B1 (en) * 2019-02-06 2020-08-11 Eaton Intelligent Power Limited Bus bar assembly with integrated surge arrestor
US11894166B2 (en) 2022-01-05 2024-02-06 Richards Mfg. Co., A New Jersey Limited Partnership Manufacturing process for surge arrestor module using compaction bladder system

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WO2013103494A1 (en) * 2011-12-14 2013-07-11 Tyco Electronics Corporation High amperage surge arresters comprising monlithic bars varistor and heat sink thermal transfert system
US8629751B2 (en) 2011-12-14 2014-01-14 Tyco Electronics Corporation High amperage surge arresters

Also Published As

Publication number Publication date
NO170790C (en) 1992-12-02
DE3769955D1 (en) 1991-06-13
GR3002390T3 (en) 1992-12-30
NO875129L (en) 1988-06-13
AU8251387A (en) 1988-06-16
JPS63161601A (en) 1988-07-05
JP2628664B2 (en) 1997-07-09
BR8706753A (en) 1988-07-05
CA1315963C (en) 1993-04-13
US4833438A (en) 1989-05-23
EP0274674B1 (en) 1991-05-08
NO875129D0 (en) 1987-12-09
ES2022282B3 (en) 1991-12-01
NO170790B (en) 1992-08-24
ATE63399T1 (en) 1991-05-15
AU592246B2 (en) 1990-01-04

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