EP0281945B1 - Manufacturing process for a lightning arrester - Google Patents

Manufacturing process for a lightning arrester Download PDF

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Publication number
EP0281945B1
EP0281945B1 EP88103272A EP88103272A EP0281945B1 EP 0281945 B1 EP0281945 B1 EP 0281945B1 EP 88103272 A EP88103272 A EP 88103272A EP 88103272 A EP88103272 A EP 88103272A EP 0281945 B1 EP0281945 B1 EP 0281945B1
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EP
European Patent Office
Prior art keywords
pellets
rod
stack
end fittings
assembly
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Expired - Lifetime
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EP88103272A
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German (de)
French (fr)
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EP0281945A1 (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 AT88103272T priority Critical patent/ATE63400T1/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

Definitions

  • the present invention relates to a method of manufacturing a lightning arrester.
  • a surge arrester is a device 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 network overvoltages (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 of a material of the varistor type based for example on zinc oxide ZnO, the electrical resistivity of which is highly non-linear as a function of the applied voltage.
  • the object of the present invention is to produce a surge arrester at reduced cost which does not have the drawbacks of the surge arresters previously described.
  • said core comprises hollow metal spacers interposed between pellets; thanks to the recesses, said space between the rod and said pellets is filled with elastomer at the time of molding of said coating.
  • the thickness of the shim is chosen as a function of the desired prestressing load on the pads.
  • Said shim can be placed between two pads or between a pad and one of said fittings.
  • said pellets are maintained with the rod under longitudinal compression by means of springs arranged between said faces of said fittings and the ends of said stack of pellets.
  • the ends of the rod can be fixed inside their respective fittings by gluing or shrinking.
  • the surge arresters 100 and 200 visible in FIGS. 1 and 2F are obtained by the method according to the invention shown diagrammatically in FIGS. 2A to 2E.
  • the second fitting 20 is fixed to the second end of the rod 1 by a sleeving shown diagrammatically by the arrows 24. A compact assembly has been produced.
  • a longitudinal traction 26 is applied to the two ends 25 of the fittings so as to leave a sufficient gap to introduce into the stack a metal wedge 27 having a recess 28.
  • this filling can be carried out from non-illustrated orifices provided in the end fittings. The result is a perfectly sealed and rigid mechanical assembly.
  • the last operation consists in overmolding on this assembly a finned coating 30 of EPDM elastomer which adheres perfectly to the entire outer surface of the above-mentioned assembly. ( Figure 2F).
  • the arrester 100 also has the preloaded rod 1 and an interposed hollow metal block referenced 45 between the two pads 6 and 7 with two metal washers 46 ensuring electrical continuity.
  • the arrester 300 of FIG. 3 also includes a rod 1 on which are pierced pierced pellets 6, 7, 8.
  • the ends of the rod 1 are sleeved or glued in cavities 55 provided in end fittings 52 and 53 having in off shoulders 56 and 57.
  • An insulating mixture can be introduced through orifices 70 in order to fill the gaps which may exist between the rod 1 and the pads 6, 7, 8. This mixture is chosen so as not to annihilate the compression function of the springs 61 and 63. Finally, the coating 30 is produced by overmolding.
  • the invention is not limited to the embodiments described and shown. Without departing from the scope of the invention, any means can be replaced by equivalent means.
  • the wedge of conductive material can be full. split, fan-shaped, based on slats, etc.
  • EPDM was given as an example of an elastomer, but any other insulating coating can be envisaged, for example based on resin, loaded or not ...

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Abstract

The present invention relates to a method of manufacturing a lightning arrester (100) having two end fittings (2,20) at either end of a substantially cylindrical central core constituted by a stack of pellets (6, 7, 8) made of a varistor-type material and having holes therethrough whereby the pellets are threaded over a central rod (1) made of stratified material. The stack assembly is put into compression against the two facing faces of the end fittings (2, 20) by means of the rod (1), the space between the rod (1) and the pellets (6, 7, 8) is filled by casting or injecting an insulating material, with the assembly obtained in this way being perfectly rigid, and a coating (30) of an elastomer of the EPDM type is molded over the assembly, with the coating adherring perfectly to all of the surfaces of the core and of the end fittings which it covers.

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 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 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 network overvoltages (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 of a material of the varistor type, 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 différentes structures de parafoudres mettant en oeuvre une âme centrale comprenant plusieurs pastilles cylindriques empilées, en matériau de type varistance, et deux ferrures extrêmes en contact électrique avec les pastilles, par exemple par l'intermédiaire de ressorts.Different structures are known for lightning arresters using a central core comprising several stacked cylindrical pellets, of varistor type material, and two extreme fittings in electrical contact with the pellets, for example by means of springs.

Ainsi dans la demande de brevet britannique n° 2 073 965 est décrite une âme centrale comprenant plusieurs pastilles cylindriques empilées et percées de trous dans lesquels passe en barreau isolant qui assure à cette âme une certaine rigidité mécanique. L'âme centrale et les deux ferrures extrêmes sont liées mécaniquement par une enveloppe commune thermorétractable.Thus in British patent application No. 2,073,965 is described a central core comprising several cylindrical pellets stacked and pierced with holes through which passes into an insulating bar which provides this core with a certain mechanical rigidity. The central core and the two end fittings are mechanically linked by a common envelope heat shrink.

Un telle disposition ne donne pas toujours des résultats électriques satisfaisants car le frettage des parois latérales de l'empilement de pastilles par une enveloppe thermorétractable n'est jamais parfait. Il ne permet pas notamment de combler les imperfections de surface de l'âme centrale, qui peuvent être dues à l'état de surface proprement dit de chaque pastille, ou à des défauts de centrage des pastilles les unes par rapport aux autres. La présence d'air entre l'âme et l'enveloppe thermorétractable ou entre l'âme et le barreau central peut entraîner à la longue une activité d'arcs électriques à l'intérieur du parafoudre, préjudiciable au bon comportement du parafoudre.Such an arrangement does not always give satisfactory electrical results because the hooping of the lateral walls of the stack of pellets by a heat-shrinkable envelope is never perfect. In particular, it does not make it possible to fill the surface imperfections of the central core, which may be due to the actual surface condition of each pellet, or to defects in the centering of the pellets with respect to each other. The presence of air between the core and the heat-shrinkable envelope or between the core and the central bar can lead in the long term to an activity of electric arcs inside the arrester, detrimental to the good behavior of the arrester.

La présente invention a pour but de réaliser un parafoudre à coût réduit ne présentant pas les inconvénients des parafoudres précédemment décrits.The object of the present invention is to produce a surge arrester at reduced cost which does not have the drawbacks of the surge arresters previously described.

La présente invention a pour objet un procédé de fabrication d'un parafoudre comprenant deux ferrures extrêmes de part et d'autre d'une âme centrale sensiblement cylindrique formée d'un empilement de pastilles en matériau de type varistance, percées de trous par lesquels elles sont enfilées sur un jonc central en matériau stratifié, caractérisé par le fait

  • que l'on met en compression par l'intermédiaire dudit jonc l'ensemble dudit empilement contre deux faces en regard desdites ferrures,
  • que l'on remplit l'espace compris entre le jonc et lesdites pastilles par coulée ou injection d'un matériau isolant, l'ensemble ainsi réalisé étant parfaitement rigide,
  • que l'on surmoule sur ledit ensemble un revêtement en élastomère de type EPDM parfaitement adhérent à toutes les surfaces de l'âme et des ferrures qu'il recouvre.
The present invention relates to a method of manufacturing a lightning arrester comprising two end fittings on either side of a substantially cylindrical central core formed by a stack of pellets of varistor type material, pierced with holes through which they are strung on a central strip of laminated material, characterized by the fact
  • that one puts in compression by means of said rod the assembly of said stack against two faces opposite said fittings,
  • that the space between the rod and said pellets is filled by casting or injection of an insulating material, the assembly thus produced being perfectly rigid,
  • that there is overmolded on said assembly an elastomer coating of the EPDM type which is perfectly adherent to all the surfaces of the core and of the fittings which it covers.

Selon un mode de réalisation particulier ladite âme comporte des entretoises métalliques évidées intercalées entre des pastilles; grâce à es évidements ledit espace compris entre le jonc et lesdites pastilles est rempli d'élastomère au moment du surmoulage dudit revêtement.According to a particular embodiment, said core comprises hollow metal spacers interposed between pellets; thanks to the recesses, said space between the rod and said pellets is filled with elastomer at the time of molding of said coating.

Afin de mettre en compression ledit empilement de pastilles contre deux faces en regard desdites ferrures on peut effectuer les opérations suivants:

  • on fixe une première extrémité dudit jonc dans la première ferrure,
  • on enfile lesdites pastilles sur ledit jonc,
  • on fixe la seconde extrémité dudic jonc dans la seconde ferrure,
  • on met en traction longitudinale l'ensemble obtenu de manière à pouvoir obtenir au sein de l'empilage un espacement permettant le passage d'une cale évidée,
  • on relâche la traction.
In order to compress said stack of pellets against two faces opposite said fittings, the operations can be carried out following:
  • a first end of said rod is fixed in the first fitting,
  • said pellets are threaded onto said rod,
  • the second end of the rod is fixed in the second fitting,
  • the assembly obtained is put in longitudinal traction so as to be able to obtain a spacing within the stack allowing the passage of a hollowed shim,
  • we release the traction.

L'épaisseur de la cale est choisie en fonction de la charge de précontrainte souhaitée sur les pastilles.The thickness of the shim is chosen as a function of the desired prestressing load on the pads.

Ladite cale peut être placée entre deux pastilles ou entre une pastille et l'une desdites ferrures. Bien entendu, il convient d'assurer dans tous les cas la continuité électrique entre la cale et la face en regard de la pastille par l'intermédiaire d'une rondelle métallique.Said shim can be placed between two pads or between a pad and one of said fittings. Of course, it is advisable to ensure in all cases the electrical continuity between the wedge and the opposite face of the pad by means of a metal washer.

Selon un autre mode de mise en oeuvre, lesdites pastilles sont maintenues avec le jonc sous compression longitudinale grâce à des ressorts disposés entre lesdites faces desdites ferrures et les extrémités dudit empilement de pastilles.According to another embodiment, said pellets are maintained with the rod under longitudinal compression by means of springs arranged between said faces of said fittings and the ends of said stack of pellets.

Les extrémités du jonc peuvent être fixées à l'intérieur de leurs ferrures respectives par collage ou rétreint.The ends of the rod can be fixed inside their respective fittings by gluing or shrinking.

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. Dans le dessin annexé:

  • La figure 1 est une vue en coupe partielle schématique d'un parafoudre obtenu à l'aide du procédé selon l'invention.
  • Les figures 2A à 2F montrent schématiquement en coupes partielles les phases du procédé selon l'invention aboutissant à un parafoudre (figure 2F) analogue à celui de la figure 1.
  • La figure 3 est une vue en coupe partielle schématique d'un autre mode de réalisation d'un parafoudre obtenu par le procédé selon l'invention.
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 limitative. In the attached drawing:
  • Figure 1 is a schematic partial sectional view of a lightning arrester obtained using the method according to the invention.
  • FIGS. 2A to 2F schematically show in partial sections the phases of the method according to the invention leading to a surge arrester (FIG. 2F) similar to that of FIG. 1.
  • Figure 3 is a schematic partial sectional view of another embodiment of a lightning arrester obtained by the method according to the invention.

Les parafoudres 100 et 200 visibles dans les figures 1 et 2F sont obtenus par le procédé selon l'invention schématisé dans les figures 2A à 2E.The surge arresters 100 and 200 visible in FIGS. 1 and 2F are obtained by the method according to the invention shown diagrammatically in FIGS. 2A to 2E.

On part d'un jonc 1 cylindrique en fibres de verre imprégnées de résine, dont une première extrémité est fixée par manchonnage (flèches 4) dans une ouverture 3 prévue dans une première ferrure d'extrémité 2 (voir figure 2A).We start from a cylindrical rod 1 made of glass fibers impregnated with resin, a first end of which is fixed by sleeving (arrows 4) in an opening 3 provided in a first end fitting 2 (see FIG. 2A).

On enfile ensuite sur le jonc 1 dans le sens de la flèche 11 plusieurs pastilles cylindriques 6, 7, 8 en oxyde de zinc ou matériau analogue du type varistance (voir figure 2B). On prévoit une rondelle métallique 10 à l'extrémité de l'empilage.Then threaded on the rod 1 in the direction of the arrow 11 several cylindrical pellets 6, 7, 8 made of zinc oxide or similar material of the varistor type (see FIG. 2B). A metal washer 10 is provided at the end of the stack.

Comme cela apparaît dans la figure 2C, on fixe la seconde ferrure 20 sur la seconde extrémité du jonc 1 par un manchonnage schématisé par les flèches 24. On a réalisé un ensemble compact.As shown in FIG. 2C, the second fitting 20 is fixed to the second end of the rod 1 by a sleeving shown diagrammatically by the arrows 24. A compact assembly has been produced.

Au niveau de la figure 2D on applique une traction longitudinale 26 aux deux extrémités 25 des ferrures de manière à laisser un intervalle suffisant pour introduire dans l'empilement une cale métallique 27 présentant un évidement 28.In FIG. 2D, a longitudinal traction 26 is applied to the two ends 25 of the fittings so as to leave a sufficient gap to introduce into the stack a metal wedge 27 having a recess 28.

Après relâchement de la pression, on aboutit à la structure de la figure 2E où le jonc est précontraint et assure la cohésion et le guidage de l'empilement des pastilles 6, 7, 8....After releasing the pressure, we arrive at the structure of FIG. 2E where the rod is prestressed and ensures the cohesion and the guiding of the stack of pellets 6, 7, 8 ...

On introduit alors par coulée un mélange isolant remplissant l'intervalle cylindrique existant entre la face extérieure du jonc 1 et les faces internes des pastilles. A titre d'exemple ce remplissage peut être effectué à partir d'orifices non illustrés prévus dans les ferrures d'extrémité. Il en résulte un ensemble mécanique parfaitement étanche et rigide.Is then introduced by casting an insulating mixture filling the cylindrical gap between the outer face of the rod 1 and the inner faces of the pellets. By way of example, this filling can be carried out from non-illustrated orifices provided in the end fittings. The result is a perfectly sealed and rigid mechanical assembly.

La dernière opération consiste à surmouler sur cet ensemble un revêtement à ailettes 30 en élastomère EPDM qui adhère parfaitement à toute la surface extérieure de l'ensemble précité. (Figure 2F).The last operation consists in overmolding on this assembly a finned coating 30 of EPDM elastomer which adheres perfectly to the entire outer surface of the above-mentioned assembly. (Figure 2F).

Si on a intercalé entre deux pastilles d'oxyde de zinc une entretoise métallique épaisse évidée, il est inutile d'effectuer un remplissage préalable de la cavité interne par un mélange isolant, le remplissage s'effectuant au moment du surmoulage du revêtement 30.If a thick, hollowed-out metal spacer is inserted between two zinc oxide pellets, it is unnecessary to fill the internal cavity with an insulating mixture beforehand, filling being carried out when the coating 30 is overmolded.

Dans la figure 1, on retrouve les mêmes éléments que dans la figure 2F. Le parafoudre 100 a également le jonc 1 précontraint et une cale évidée métallique interposée référencée 45 entre les deux pastilles 6 et 7 avec deux rondelles métalliques 46 assurant la continuité électrique. On peut prévoir de disposer plusieurs cales en fonction de la précontrainte choisie.In Figure 1, we find the same elements as in Figure 2F. The arrester 100 also has the preloaded rod 1 and an interposed hollow metal block referenced 45 between the two pads 6 and 7 with two metal washers 46 ensuring electrical continuity. We can plan to have several shims depending on the prestress chosen.

Le parafoudre 300 de la figure 3 comporte également un jonc 1 sur lequel sont enfilées des pastilles percées 6, 7, 8. Les extrémités du jonc 1 sont manchonnées ou collées dans des cavités 55 prévues dans des ferrures d'extrémités 52 et 53 présentant en outre des épaulements 56 et 57.The arrester 300 of FIG. 3 also includes a rod 1 on which are pierced pierced pellets 6, 7, 8. The ends of the rod 1 are sleeved or glued in cavities 55 provided in end fittings 52 and 53 having in off shoulders 56 and 57.

Elles comprennent enfin des cavités contenant des ressorts 61 et 63 appliqués sur les extrémités de l'empilement par l'intermédiaire de rondelles métalliques 62 et 64.Finally, they include cavities containing springs 61 and 63 applied to the ends of the stack by means of metal washers 62 and 64.

Un mélange isolant peut être introduit par des orifices 70 afin de combler les vides pouvant exister entre le jonc 1 et les pastilles 6, 7, 8. Ce mélange est choisi de manière à ne pas annihiler la fonction de compression des ressorts 61 et 63. On réalise enfin par surmoulage le revêtement 30.An insulating mixture can be introduced through orifices 70 in order to fill the gaps which may exist between the rod 1 and the pads 6, 7, 8. This mixture is chosen so as not to annihilate the compression function of the springs 61 and 63. Finally, the coating 30 is produced by overmolding.

Comme dans le cas précédent, on peut placer éventuellement des entretoises métalliques évidées entre les pastilles de manière à favoriser la pénétration de l'élastomère au moment du surmoulage et à éviter l'opération intermédiaire de remplissage précédemment décrite.As in the previous case, it is possible to place hollow metal spacers between the pellets so as to favor the penetration of the elastomer at the time of overmolding and to avoid the intermediate filling operation described above.

Bien entendu l'invention n'est pas limitée aux modes de réalisation décrits et représentés. On pourra, sans sortir du cadre de l'invention, remplacer tout moyen par un moyen équivalent. Ainsi la cale en matériau conducteur peut être pleine. fendue, en éventail à base de lamelles etc...Of course, the invention is not limited to the embodiments described and shown. Without departing from the scope of the invention, any means can be replaced by equivalent means. Thus the wedge of conductive material can be full. split, fan-shaped, based on slats, etc.

L'EPDM a été donné comme exemple d'élastomère, mais tout autre revêtement isolant peut être envisagé, par exemple à base de résine chargée ou non...EPDM was given as an example of an elastomer, but any other insulating coating can be envisaged, for example based on resin, loaded or not ...

Claims (8)

1. A method of manufacturing a ligthning arrester comprising two end fittings (2, 20) at respective ends of a central core which is substantially cylindrical and constituted by a stack of pellets (6, 7, 8) made of a varistor-type material, said pellets having holes drilled therethrough whereby they are threaded over a central rod (1) made of stratified material, characterized in that
- said stack assembly is compressed by means of said rod (1) between the two facing faces of said end fittings;
- the space between the rod (1) and said pellets (6, 7, 8) is filled by casting or injecting an insulating material, with the assembly thus constituted being perfectly rigid; and
- a sheath of an elastomer of the EPDM type is molded over said assembly and adhers perfectly to all of the surfaces of the core and the end fittings which it covers.
2. A method of manufacturing a lightning arrester according to claim 1, characterized in that said core includes slotted metal wedges (45) interposed between the pellets (6, 7) and that said space lying between the rod (1) and said pellets is filled with elastomer when said sheath is molded thereover.
3. A method of manufacturing a lightning arrester according to claim 1, characterized in that in order to put said stack of pellets into compression against the two facing faces of said end fittings, the following operations are performed:
- a first end of said rod (1) is fixed in a first end fitting (2),
- said pellets (6, 7, 8) are threaded over said rod (1),
- the second end of said rod is fixed in the second end fitting (20),
- the resulting assembly is put under longitudinal traction so as to obtain a space within the stack enabling a slotted wedge (27) to be received therein, and
- the traction is released.
4. A method of manufacture according to claim 3, characterized in that said wedge (45) is placed between two pellets (6, 7) together with two intermediate metal washers (46) for ensuring electrical continuity.
5. A method of manufacture according to claim 3, characterized in that said wedge (27) is placed between a pellet (8) and one of said end fittings (20), together with a metal washer (10) ensuring electrical continuity.
6. A method of manufacturing a lightning arrester according to claim 1, characterized in that said pellets (6, 7, 8) are maintained together with the rod under longitudinal compression by means of springs (61, 63) disposed between said faces of said end fittings (52, 53) and the ends of said stack of pellets.
7. A method of manufacturing a lightning arrester according to any preceding claim, characterized in that the ends of said rod are fixed in said end fittings by a method elected from crimping and gluing.
8. A method of manufacture according to any preceding claim, characterized in that said pellets are made from material based on zinc oxide.
EP88103272A 1987-03-06 1988-03-03 Manufacturing process for a lightning arrester Expired - Lifetime EP0281945B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88103272T ATE63400T1 (en) 1987-03-06 1988-03-03 PROCESS FOR MAKING A LIGHTNING ROD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8703049 1987-03-06
FR8703049 1987-03-06

Publications (2)

Publication Number Publication Date
EP0281945A1 EP0281945A1 (en) 1988-09-14
EP0281945B1 true EP0281945B1 (en) 1991-05-08

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US (1) US4825188A (en)
EP (1) EP0281945B1 (en)
JP (1) JP2647893B2 (en)
AT (1) ATE63400T1 (en)
AU (1) AU595433B2 (en)
BR (1) BR8800980A (en)
CA (1) CA1310811C (en)
DE (1) DE3862658D1 (en)
ES (1) ES2022494B3 (en)
GR (1) GR3002242T3 (en)
NO (1) NO169413C (en)

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FR2659169B1 (en) * 1990-03-02 1992-06-19 Ferraz SURGE PROTECTION DEVICE FOR THE PROTECTION OF ELECTRICAL LINES.
CH682858A5 (en) * 1991-12-04 1993-11-30 Asea Brown Boveri Surge arresters.
FR2698736B1 (en) * 1992-11-27 1995-03-17 Soule Sa Improvements to varistor surge arresters especially for high voltage.
US5757604A (en) * 1996-06-27 1998-05-26 Raychem Corporation Surge arrester having grooved and ridged terminals
US5680289A (en) * 1996-06-27 1997-10-21 Raychem Corporation Surge arrester
US5712757A (en) * 1996-06-27 1998-01-27 Raychem Corporation Surge arrester having ridged terminals
FR2757693B1 (en) * 1996-12-23 1999-02-19 Sediver SURGE PROTECTOR WITH ENVELOPE HAVING EMBOSSED OUTER SURFACE
GB2322487B (en) * 1997-02-25 2001-07-11 Bowthorpe Ind Ltd Improvements relating to electrical surge arresters
CN1253656A (en) 1997-02-25 2000-05-17 鲍索普工业有限公司 Improvements relating to electrical surge arresters
US5930102A (en) 1997-10-08 1999-07-27 Joslyn Manufacturing Co. Surge arrester having single surge arresting block
US6014306A (en) * 1998-09-24 2000-01-11 Hubbell Incorporated Electrical device with wedge insert gas seal for probe
US6519129B1 (en) 1999-11-02 2003-02-11 Cooper Industries, Inc. Surge arrester module with bonded component stack
ES2166689B1 (en) * 2000-01-26 2003-10-16 Ind De Aparellaje Electrico S SURVEY DOWNLOADER.
DE10020129C1 (en) * 2000-04-14 2001-11-15 Siemens Ag Module with surge arrester for a high-voltage system
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
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US10741313B1 (en) * 2019-02-06 2020-08-11 Eaton Intelligent Power Limited Bus bar assembly with integrated surge arrestor
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AU595433B2 (en) 1990-03-29
NO880941D0 (en) 1988-03-03
US4825188A (en) 1989-04-25
NO169413C (en) 1992-06-17
AU1257388A (en) 1988-09-08
JPS63228701A (en) 1988-09-22
DE3862658D1 (en) 1991-06-13
GR3002242T3 (en) 1992-12-30
JP2647893B2 (en) 1997-08-27
ATE63400T1 (en) 1991-05-15
ES2022494B3 (en) 1991-12-01
CA1310811C (en) 1992-12-01
NO880941L (en) 1988-09-07
EP0281945A1 (en) 1988-09-14
BR8800980A (en) 1988-10-11
NO169413B (en) 1992-03-09

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