EP0304690A1 - Production process for a lightning arrester, and lightning arrester obtained by this process - Google Patents
Production process for a lightning arrester, and lightning arrester obtained by this process Download PDFInfo
- Publication number
- EP0304690A1 EP0304690A1 EP88112616A EP88112616A EP0304690A1 EP 0304690 A1 EP0304690 A1 EP 0304690A1 EP 88112616 A EP88112616 A EP 88112616A EP 88112616 A EP88112616 A EP 88112616A EP 0304690 A1 EP0304690 A1 EP 0304690A1
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- European Patent Office
- Prior art keywords
- stack
- spacers
- fittings
- manufacturing
- envelope
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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
Definitions
- the present invention relates to a method of manufacturing a lightning arrester and a lightning arrester obtained by this method.
- 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 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.
- 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.
- surge arresters using a central core comprising several stacked cylindrical pads, of varistor type material, and two extreme fittings in electrical contact with the pads, for example by means of springs.
- a stack of the pellets is produced with very resistant springs interposed and extreme fittings, by applying a significant compression which can go up to several tens of kg / cm2 along the direction of the stacking axis.
- a filament winding of resin-impregnated glass fibers is then carried around the assembly thus compressed. The winding is carried out at a very small angle relative to said axis; the fiber is stretched successively around a shoulder of a fitting then around the corresponding shoulder of the opposite fitting.
- Such a winding has very high mechanical strength in the longitudinal direction, intended to balance the prestress induced in the stack of pellets before and during winding.
- Resistance to such a longitudinal prestress necessarily implies the creation of shear stresses at the interface between the stack of pellets and the envelope formed by the taut filament winding, in particular in the event of thermal variations, since the materials constituting the have very different mechanical characteristics.
- the detachment of the envelope relative to the stack can then be the site of partial discharges or of sufficient arcing activity which can, in the more or less long term, lead to degradation and even to total short-circuit. from the whole.
- the present invention aims to implement a method of manufacturing a lightning arrester resulting in a more reliable product than the lightning arrester of the prior art.
- the present invention relates to a method of manufacturing a lightning arrester in which first of all a stack of pellets is made of a varistor type material with spacers, extreme fittings, and means for ensuring electrical continuity between the pellets, and between the pellets and the two fittings, then a filament winding is carried out around this assembly, a process characterized by the fact that said stack is mounted in a device for producing said filament winding, so that only perfect coaxiality of all its constituents is obtained, that said filament winding of glass fibers impregnated with resin is carried out in such a way that it ensures adhesion and radial shrinking of said stack, without longitudinal compression, - And that, after the polymerization of the resin of the envelope thus formed, a coating of elastomeric material of the type is injected thereon EPDM
- the filament winding therefore has the sole function of joining the pellets together, being very adherent both on their lateral surface and on that of the spacers, and having a very high mechanical resistance in the radial direction.
- the angle of the turns is very open relative to the axis of said stack.
- the winding angle relative to the axis of the assembly is between 80 ° and 90 °.
- tubular spacers inside which are arranged electrical connection means between the metallized faces of two adjacent pads. They also have recesses to guide said pads radially.
- Said electrical connection means are constituted for example by a low pressure spring associated with metal lamellae applied respectively against said metallized faces.
- said electrical connection means consist of a wire welded to metal strips applied respectively against said metallized faces.
- the invention also relates to a surge arrester comprising a stack of pellets of a varistor type material with spacers and end fittings, and a casing made of glass fibers impregnated with resin, characterized in that the said spacers are tubular , that they comprise, like the end fittings, in internal housings means for ensuring the electrical connection throughout the stack, that said envelope provides radial shrinking of said stack without axial compression, with adhesion to the lateral surfaces of said pellets, said spacers and said fittings, and that said envelope is provided with a finned coating of injected elastomer.
- a stack having a common axis 10 is produced by interposing between the pellets 1 tubular spacers 2, which may be metallic or insulating. They have a recess 12 allowing radial guidance of the pellets 1, and an internal housing 13; likewise, the fittings 3 comprise a recess 15 and a housing 14.
- the spacers 2 have a sealing function and prevent the resin impregnating the fibers 4 from infiltrating between the pellets 1.
- These spacers can be made of a resin similar to that of the impregnation resin so to further promote the adhesion of the envelope.
- a finned coating 5 of elastomer for example EPDM, is injected thereon.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermistors And Varistors (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Abstract
L'invention concerne un parafoudre comprenant un empilement de pastilles (1) en oxyde de zinc et d'entretoises tubulaires (2) entre deux ferrures extrêmes (3). Cet ensemble est enveloppé d'un enroulement filamentaire (4) assurant un frettage radial sans compression axiale, avec une adhérence sur les surfaces latérales de tous les éléments de l'empilement.The invention relates to a surge arrester comprising a stack of zinc oxide pellets (1) and tubular spacers (2) between two end fittings (3). This assembly is wrapped in a filament winding (4) ensuring radial shrinking without axial compression, with adhesion to the lateral surfaces of all the elements of the stack.
Description
La présente invention concerne un procédé de fabrication d'un parafoudre et un parafoudre obtenu par ce procédé.The present invention relates to a method of manufacturing a lightning arrester and a lightning arrester obtained by this method.
Un parafoudre est un dispositif qui est placé entre le 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 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 telle 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.
Un 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.One knows different structures of surge arresters using a central core comprising several stacked cylindrical pads, of varistor type material, and two extreme fittings in electrical contact with the pads, for example by means of springs.
Selon un procédé de fabrication de l'art antérieur décrit dans le brevet US-A-4 656 555, on réalise un empilement des pastilles avec des ressorts très résistants interposés et des ferrures extrêmes, en appliquant une compression importante pouvant aller jusqu'à plusieurs dizaines de kg/cm2 suivant la direction de l'axe de l'empilement. On effectue ensuite autour de l'ensemble ainsi comprimé un enroulement filamentaire de fibres de verre imprégnées de résine. L'enroulement est réalisé avec un angle très faible par rapport audit axe ; la fibre est tendue successivement autour d'un épaulement d'une ferrure puis autour de l'épaulement correspondant de la ferrure opposée. Un tel enroulement présente une très forte résistance mécanique dans le sens longitudinal, destinée à équilibrer la précontrainte induite dans l'empilement de pastilles avant et pendant le bobinage. La résistance à une telle précontrainte longitudinale implique nécessairement la création de contraintes de cisaillement à l'interface entre l'empilement des pastilles et l'enveloppe formée par l'enroulement filamentaire tendu, notamment en cas de variations thermiques, car les matériaux constitutifs de l'ensemble ont des caractéristiques mécaniques très différentes. Le décollement de l'enveloppe par rapport à l'empilement peut alors être le siège de décharges partielles ou d'une activité d'arcs suffisante qui peut, à plus ou moins long terme, conduire à une dégradation et même au court-circuit total de l'ensemble.According to a manufacturing process of the prior art described in US-A-4,656,555, a stack of the pellets is produced with very resistant springs interposed and extreme fittings, by applying a significant compression which can go up to several tens of kg / cm2 along the direction of the stacking axis. A filament winding of resin-impregnated glass fibers is then carried around the assembly thus compressed. The winding is carried out at a very small angle relative to said axis; the fiber is stretched successively around a shoulder of a fitting then around the corresponding shoulder of the opposite fitting. Such a winding has very high mechanical strength in the longitudinal direction, intended to balance the prestress induced in the stack of pellets before and during winding. Resistance to such a longitudinal prestress necessarily implies the creation of shear stresses at the interface between the stack of pellets and the envelope formed by the taut filament winding, in particular in the event of thermal variations, since the materials constituting the have very different mechanical characteristics. The detachment of the envelope relative to the stack can then be the site of partial discharges or of sufficient arcing activity which can, in the more or less long term, lead to degradation and even to total short-circuit. from the whole.
La présente invention a pour but de mettre en oeuvre un procédé de fabrication d'un parafoudre aboutissant à un produit plus fiable que le parafoudre de l'art antérieur.The present invention aims to implement a method of manufacturing a lightning arrester resulting in a more reliable product than the lightning arrester of the prior art.
La présente invention a pour objet un procédé de fabrication d'un parafoudre dans lequel on réalise tout d'abord un empilement de pastilles en un matériau de type varistance avec des entretoises, des ferrures extrêmes, et des moyens pour assurer la continuité électrique entre les pastilles, et entre les pastilles et les deux ferrures, puis on effectue un enroulement filamentaire autour de cet ensemble, procédé caractérisé par le fait
- que ledit empilement est monté dans un dispositif pour la réalisation dudit enroulement filamentaire, de manière que soit obtenue seulement une parfaite coaxialité de tous ses constituants,
- que ledit enroulement filamentaire de fibres de verre imprégnées de résine est effectué de manière telle qu'il assure une adhérisation et un frettage radial dudit empilement, sans compression longitudinale,
- et que, après la polymérisation de la résine de l'enveloppe ainsi formée, on injecte sur elle un revêtement en matériau élastomère de type E.P.D.M.The present invention relates to a method of manufacturing a lightning arrester in which first of all a stack of pellets is made of a varistor type material with spacers, extreme fittings, and means for ensuring electrical continuity between the pellets, and between the pellets and the two fittings, then a filament winding is carried out around this assembly, a process characterized by the fact
that said stack is mounted in a device for producing said filament winding, so that only perfect coaxiality of all its constituents is obtained,
that said filament winding of glass fibers impregnated with resin is carried out in such a way that it ensures adhesion and radial shrinking of said stack, without longitudinal compression,
- And that, after the polymerization of the resin of the envelope thus formed, a coating of elastomeric material of the type is injected thereon EPDM
L'enroulement filamentaire a donc pour seule fonction de solidariser les pastilles entre elles, en étant très adhérent aussi bien sur leur surface latérale que sur celle des entretoises, et en présentant une résistance mécanique très élevée dans le sens radial. L'angle des spires est très ouvert par rapport à l'axe dudit empilement. Ainsi, l'angle de bobinage par rapport à l'axe de l'ensemble est compris entre 80° et 90°.The filament winding therefore has the sole function of joining the pellets together, being very adherent both on their lateral surface and on that of the spacers, and having a very high mechanical resistance in the radial direction. The angle of the turns is very open relative to the axis of said stack. Thus, the winding angle relative to the axis of the assembly is between 80 ° and 90 °.
Selon un mode de réalisation préférentiel, on choisit des entretoises tubulaires à l'intérieur desquelles sont disposés des moyens de connexion électrique entre les faces métallisées de deux pastilles adjacentes. Elles présentent en outre des évidements pour guider radialement lesdites pastilles.According to a preferred embodiment, one chooses tubular spacers inside which are arranged electrical connection means between the metallized faces of two adjacent pads. They also have recesses to guide said pads radially.
Lesdits moyens de connexion électrique sont constitués par exemple par un ressort de faible pression associé à des lamelles métalliques appliquées respectivement contre lesdites faces métallisées.Said electrical connection means are constituted for example by a low pressure spring associated with metal lamellae applied respectively against said metallized faces.
Selon une variante équivalente, lesdits moyens de connexion électrique sont constitués par un fil soudé à des lamelles métalliques appliquées respectivement contre lesdites faces métallisées.According to an equivalent variant, said electrical connection means consist of a wire welded to metal strips applied respectively against said metallized faces.
L'invention a également pour objet un parafoudre comprenant un empilement de pastilles en un matériau de type varistance avec des entretoises et des ferrures d'extrémités, et une enveloppe en fibres de verre imprégnées de résine, caractérisé par le fait que lesdites entretoises sont tubulaires, qu'elles comportent, comme les ferrures d'extrémité, dans des logements internes des moyens pour assurer la liaison électrique dans tout l'empilement, que ladite enveloppe assure un frettage radial dudit empilement sans compression axiale, avec adhérence sur les surfaces latérales desdites pastilles, desdites entretoises et desdites ferrures, et que ladite enveloppe est munie d'un revêtement à ailettes en élastomère injecté.The invention also relates to a surge arrester comprising a stack of pellets of a varistor type material with spacers and end fittings, and a casing made of glass fibers impregnated with resin, characterized in that the said spacers are tubular , that they comprise, like the end fittings, in internal housings means for ensuring the electrical connection throughout the stack, that said envelope provides radial shrinking of said stack without axial compression, with adhesion to the lateral surfaces of said pellets, said spacers and said fittings, and that said envelope is provided with a finned coating of injected elastomer.
D'autres caractéristiques et avantages de la présente invention apparaîtront au cours de la description suivante d'un mode de réalisation donné à titre illustratif mais nullement limitatif. Dans le dessin annexé la figure unique est une vue partielle schématique en coupe d'un parafoudre selon l'invention.Other characteristics and advantages of the present invention will appear during the following description of an embodiment given by way of illustration but in no way limitative. In the accompanying drawing the single figure is a partial schematic sectional view of a surge arrester according to the invention.
On part de deux ferrures d'extrémités 3 et d'un ensemble de pastilles 1 en oxyde de zinc, métallisées suivant leurs faces planes 6. On réalise un empilement ayant un axe commun 10 en interposant entre les pastilles 1 des entretoises tubulaires 2, qui peuvent être métalliques ou isolantes. Elles présentent un évidement 12 permettant un guidage radial des pastilles 1, et un logement interne 13 ; de même, les ferrures 3 comportent un évidement 15 et un logement 14.We start from two end fittings 3 and a set of
Afin d'assurer le continuité électrique, on dispose dans les logements 13 et 14 des lamelles métalliques 11 en contact avec les faces métallisées 6 des pastilles 1 avec des ressorts 7 de faible pression.In order to ensure electrical continuity, there are in the
Tout cet ensemble est mis en place dans un dispositif pour la réalisation de l'enroulement filamentaire. On enroule autour de l'empilement une ou plusieurs nappes de fibres de verre 4 imprégnées de résine de manière à assurer un frettage radial ; l'angle de bobinage par rapport à l'axe 10 est très ouvert. Il est compris entre 80° et 90°. L'enveloppe ainsi formée est parfaitement adhérente aux surfaces latérales des ferrures 3, des entretoises 2 et des pastilles 1. Elle n'assure aucune compression axiale sur cet ensemble.All of this is put in place in a device for making the filament winding. One or more layers of resin-impregnated glass fibers 4 are wound around the stack so as to ensure radial shrinking; the winding angle relative to the axis 10 is very open. It is between 80 ° and 90 °. The envelope thus formed is perfectly adherent to the lateral surfaces of the fittings 3, of the spacers 2 and of the
Au moment du bobinage, les entretoises 2 ont une fonction d'étanchéité et empêchent la résine imprégnant les fibres 4 de s'infiltrer entre les pastilles 1. Ces entretoises peuvent être réalisées en une résine analogue à celle de la résine d'imprégnation de manière à favoriser encore l'adhérence de l'enveloppe.At the time of winding, the spacers 2 have a sealing function and prevent the resin impregnating the fibers 4 from infiltrating between the
Après polymérisation de cette enveloppe, on injecte sur elle un revêtement à ailettes 5 en élastomère, par exemple en EPDM.After this envelope has polymerized, a
Cette liaison mécanique entre l'enveloppe et l'empilement est totalement indépendante des moyens de connexion électrique entre les pastilles, et entre les pastilles et les deux ferrures 3.This mechanical connection between the envelope and the stack is completely independent of the electrical connection means between the pellets, and between the pellets and the two fittings 3.
Bien entendu l'invention n'est pas limitée au mode de réalisation qui vient d'être décrit. On pourra, sans sortir du cadre de l'invention remplacer tout moyen par un moyen équivalent. Ainsi la connexion électrique entre deux lamelles 11 peut être effectuée par un fil électrique soudé.Of course, the invention is not limited to the embodiment which has just been described. Without departing from the scope of the invention, any means may be replaced by equivalent means. Thus the electrical connection between two
Claims (8)
- que l'on choisit des entretoises tubulaires (2)à l'intérieur desquelles sont disposés des moyens de connexion électrique entre les faces métallisées (6) de deux pastilles adjacentes (1),
- que ledit empilement est monté dans un dispositif pour la réalisation dudit enroulement filamentaire, de manière que soit obtenue seulement une parfaite coaxialité de tous ses constituants,
- que ledit enroulement filamentaire de fibres de verre imprégnées de résine est effectué de manière telle qu'il assure une adhérisation et un frettage radial dudit empilement, sans compression longitudinale,
- et que, après la polymérisation de la résine de l'enveloppe ainsi formée, on injecte sur elle un revêtement (5) en matériau de type E.P.D.M.1 / Method for manufacturing a surge arrester in which a stack of pellets (1) is first made of a varistor type material with spacers, extreme fittings (3), and means for ensuring electrical continuity between the two fittings, then a filament winding is carried out around this assembly, a process characterized by the fact
- we choose tubular spacers (2) inside which are arranged electrical connection means between the metallized faces (6) of two adjacent pads (1),
that said stack is mounted in a device for producing said filament winding, so that only perfect coaxiality of all its constituents is obtained,
that said filament winding of glass fibers impregnated with resin is carried out in such a way that it ensures adhesion and radial shrinking of said stack, without longitudinal compression,
- And that, after the polymerization of the resin of the envelope thus formed, a coating (5) of EPDM material is injected on it
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8711201 | 1987-08-06 | ||
| FR8711201A FR2619244B1 (en) | 1987-08-06 | 1987-08-06 | PROCESS FOR MANUFACTURING A SURGE PROTECTOR AND SURGE PROTECTOR OBTAINED BY THIS PROCESS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0304690A1 true EP0304690A1 (en) | 1989-03-01 |
Family
ID=9353973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88112616A Withdrawn EP0304690A1 (en) | 1987-08-06 | 1988-08-03 | Production process for a lightning arrester, and lightning arrester obtained by this process |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4864456A (en) |
| EP (1) | EP0304690A1 (en) |
| JP (1) | JP2761219B2 (en) |
| AU (1) | AU603916B2 (en) |
| BR (1) | BR8803902A (en) |
| CA (1) | CA1305513C (en) |
| FR (1) | FR2619244B1 (en) |
| NO (1) | NO172462C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU603020B2 (en) * | 1988-12-06 | 1990-11-01 | Asea Brown Boveri Ab | Surge arrester |
| EP0397163A1 (en) * | 1989-05-12 | 1990-11-14 | Sediver, Societe Europeenne D'isolateurs En Verre Et Composite | Wound hermetic filamentary envelope and surge arrester assembly using same |
| 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 |
| EP0443178A2 (en) * | 1990-02-23 | 1991-08-28 | AMERACE CORPORATION (a Delaware corporation) | Surge arrester with rigid insulating housing |
| EP0445054A1 (en) * | 1990-03-02 | 1991-09-04 | FERRAZ Société Anonyme | Lightning arrestor device for the protection of electric lines |
| FR2698736A1 (en) * | 1992-11-27 | 1994-06-03 | Soule Sa | Fabricating lightning conductor for use in high voltage electricity distribution network - using varistor disc stack with flexible sheath cover and outer extruded section with fins |
| FR2726118A1 (en) * | 1994-10-19 | 1996-04-26 | Girard Francois | SURGE PROTECTION DEVICE |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220480A (en) * | 1990-10-16 | 1993-06-15 | Cooper Power Systems, Inc. | Low voltage, high energy surge arrester for secondary applications |
| CH682858A5 (en) * | 1991-12-04 | 1993-11-30 | Asea Brown Boveri | Surge arresters. |
| US5363266A (en) * | 1992-06-18 | 1994-11-08 | Raychem Corporation | Electrical surge arrester |
| US5594613A (en) * | 1992-10-09 | 1997-01-14 | Cooper Industries, Inc. | Surge arrester having controlled multiple current paths |
| US5959822A (en) * | 1995-12-22 | 1999-09-28 | Hubbell Incorporated | Compact lightning arrester assembly |
| US5652690A (en) * | 1996-01-26 | 1997-07-29 | General Electric Company | Lightning arrester having a double enclosure assembly |
| US6014306A (en) * | 1998-09-24 | 2000-01-11 | Hubbell Incorporated | Electrical device with wedge insert gas seal for probe |
| JP2001023807A (en) * | 1999-07-09 | 2001-01-26 | Toshiba Corp | Lightning arrester and manufacture thereof |
| FR2800903B1 (en) | 1999-10-25 | 2001-12-21 | Soule Materiel Electr | PERFECTED SURGE PROTECTOR BASED ON ELECTRIC VARISTORS |
| 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 |
| JP2007182654A (en) * | 2006-01-02 | 2007-07-19 | Tokiko Irino | Moisture management socks |
| DE102017214287A1 (en) * | 2017-08-16 | 2019-02-21 | Siemens Aktiengesellschaft | Surge arresters and method of manufacturing a surge arrester |
| WO2020043452A1 (en) * | 2018-08-30 | 2020-03-05 | Siemens Aktiengesellschaft | Item of electrical equipment and production method for an item of electrical equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE898603C (en) * | 1946-10-19 | 1953-12-03 | Dietrich Mueller Hillebrand Dr | Valve element for surge arrester |
| DE3544141A1 (en) * | 1984-12-14 | 1986-06-26 | Hubbell Inc Harvey | WINDED ELECTRICAL ARRANGEMENTS AND METHOD FOR PRODUCING SUCH |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3698920A (en) * | 1967-08-30 | 1972-10-17 | Gen Electric | Porous ceramic insulating material and method of making employing wax |
| JPS6015127B2 (en) * | 1980-04-07 | 1985-04-17 | 株式会社日立製作所 | Voltage nonlinear resistor and its manufacturing method |
| US4404614A (en) * | 1981-05-15 | 1983-09-13 | Electric Power Research Institute, Inc. | Surge arrester having a non-fragmenting outer housing |
| JPS5819485U (en) * | 1981-07-29 | 1983-02-05 | 日立化成工業株式会社 | Molded arrester |
| DK173921B1 (en) * | 1986-01-29 | 2002-02-18 | Bowthorpe Ind Ltd | Electric surge arrester, method and apparatus for making and using such a device |
-
1987
- 1987-08-06 FR FR8711201A patent/FR2619244B1/en not_active Expired - Lifetime
-
1988
- 1988-07-26 US US07/224,146 patent/US4864456A/en not_active Expired - Lifetime
- 1988-08-03 JP JP63194285A patent/JP2761219B2/en not_active Expired - Lifetime
- 1988-08-03 EP EP88112616A patent/EP0304690A1/en not_active Withdrawn
- 1988-08-04 NO NO883458A patent/NO172462C/en not_active IP Right Cessation
- 1988-08-05 BR BR8803902A patent/BR8803902A/en unknown
- 1988-08-05 CA CA000574011A patent/CA1305513C/en not_active Expired - Lifetime
- 1988-08-05 AU AU20457/88A patent/AU603916B2/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE898603C (en) * | 1946-10-19 | 1953-12-03 | Dietrich Mueller Hillebrand Dr | Valve element for surge arrester |
| DE3544141A1 (en) * | 1984-12-14 | 1986-06-26 | Hubbell Inc Harvey | WINDED ELECTRICAL ARRANGEMENTS AND METHOD FOR PRODUCING SUCH |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU603020B2 (en) * | 1988-12-06 | 1990-11-01 | Asea Brown Boveri Ab | Surge arrester |
| US5050032A (en) * | 1989-05-12 | 1991-09-17 | Sediver Societe Europeenne D'isolateurs En Verre Et Composite | Sealed envelope based on a filamentary winding, and application to a composite lightning arrester |
| EP0397163A1 (en) * | 1989-05-12 | 1990-11-14 | Sediver, Societe Europeenne D'isolateurs En Verre Et Composite | Wound hermetic filamentary envelope and surge arrester assembly using same |
| FR2646957A1 (en) * | 1989-05-12 | 1990-11-16 | Sediver Ste Europ Isolateurs V | WATERPROOF ENCLOSURE BASED ON FILAMENTARY WINDING, AND COMPOSITE SURGE PROTECTION USING THE SAME |
| AU627875B2 (en) * | 1989-05-12 | 1992-09-03 | Societe Anonyme dite: Sediver Societe Europeene d'Isolateurs En Verre Et Composite | A sealed envelope based on a filamentary winding, and application to a composite lightning arrester |
| FR2649243A1 (en) * | 1989-06-30 | 1991-01-04 | Sediver Ste Europ Isolat Verre | LINE INSULATOR WITH AC POWER PROVIDED WITH A PROTECTIVE SPLITTER |
| 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 |
| EP0443178A2 (en) * | 1990-02-23 | 1991-08-28 | AMERACE CORPORATION (a Delaware corporation) | Surge arrester with rigid insulating housing |
| EP0443178A3 (en) * | 1990-02-23 | 1992-10-21 | Amerace Corporation (A Delaware Corporation) | Surge arrester with rigid insulating housing |
| EP0445054A1 (en) * | 1990-03-02 | 1991-09-04 | FERRAZ Société Anonyme | Lightning arrestor device for the protection of electric lines |
| FR2659169A1 (en) * | 1990-03-02 | 1991-09-06 | Ferraz | SURGE PROTECTION DEVICE FOR THE PROTECTION OF ELECTRICAL LINES. |
| TR25323A (en) * | 1990-03-02 | 1993-01-01 | Ferraz | PURPOSE YILDIRIMSARAR INSTALLATION FOR THE PROTECTION OF ELECTRICAL LINES |
| FR2698736A1 (en) * | 1992-11-27 | 1994-06-03 | Soule Sa | Fabricating lightning conductor for use in high voltage electricity distribution network - using varistor disc stack with flexible sheath cover and outer extruded section with fins |
| EP0605265A1 (en) * | 1992-11-27 | 1994-07-06 | Soule Materiel Electrique | Arresters on varistor basis, in particular for high voltages |
| FR2726118A1 (en) * | 1994-10-19 | 1996-04-26 | Girard Francois | SURGE PROTECTION DEVICE |
| WO1996013043A1 (en) * | 1994-10-19 | 1996-05-02 | Girard Francois | Lightning arrester device |
| US5831808A (en) * | 1994-10-19 | 1998-11-03 | Girard; Francois | Lightning arrester device |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1305513C (en) | 1992-07-21 |
| NO883458L (en) | 1989-02-07 |
| NO883458D0 (en) | 1988-08-04 |
| AU2045788A (en) | 1989-02-09 |
| FR2619244A1 (en) | 1989-02-10 |
| BR8803902A (en) | 1989-02-28 |
| NO172462B (en) | 1993-04-13 |
| NO172462C (en) | 1993-07-21 |
| US4864456A (en) | 1989-09-05 |
| FR2619244B1 (en) | 1992-09-04 |
| JPS6465804A (en) | 1989-03-13 |
| AU603916B2 (en) | 1990-11-29 |
| JP2761219B2 (en) | 1998-06-04 |
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