EP0445054A1 - Lightning arrestor device for the protection of electric lines - Google Patents

Lightning arrestor device for the protection of electric lines Download PDF

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Publication number
EP0445054A1
EP0445054A1 EP91420071A EP91420071A EP0445054A1 EP 0445054 A1 EP0445054 A1 EP 0445054A1 EP 91420071 A EP91420071 A EP 91420071A EP 91420071 A EP91420071 A EP 91420071A EP 0445054 A1 EP0445054 A1 EP 0445054A1
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EP
European Patent Office
Prior art keywords
stack
intermediate piece
adhesive
varistors
assembly
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Granted
Application number
EP91420071A
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German (de)
French (fr)
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EP0445054B1 (en
Inventor
Christian Gazzola
Joèl Gauchon
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Ferraz SA
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Ferraz SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/16—Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
    • 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 surge protective devices intended for the protection of power lines, in particular of medium voltage overhead lines.
  • the insulation element arranged between the two capsules or terminal connection electrodes is constituted by a stack of varistors based on zinc oxide (Zn0) maintained under axial pressure.
  • this stack and the elastic pressure means are contained inside a rigid tube made of an insulating material, itself sheathed by a plastic envelope, the assembly formed by said tube and envelope giving the aforementioned stacking the mechanical strength and sealing necessary for the practical use of the device.
  • the invention consists in having between the facing faces of the constituent elements (varistors and electrodes) of the insulation stack, intermediate parts with corrugated profile which by crushing the electrical connection and which are profiled to provide free areas suitable for receiving the adhesive layer necessary for the mutual assembly of the aforementioned elements.
  • the device shown in fig. 1 essentially comprises an insulation element formed by the rigid and resistant assembly of a stack of varistors 1 maintained under pressure between two terminal connection electrodes 2, which element 1-2 is covered in a sealed manner by an insulating envelope 3 which with annular projections 3a is directly obtained by overmoulding a synthetic material on said member.
  • the mode of implementation shown in fig. 2 and 3 uses a intermediate piece 4 formed by a washer with a corrugated profile, the outside diameter of which is slightly less than that of each of the varistors 1. On the transverse face of each of these is deposited, for example by a screen printing process, a layer of glue 5 in the form of a disc, the diameter of which is less than the inside diameter of the corrugated washer 4.
  • each adhesive disc 5 is lined with an adhesive ring 50 which surrounds the washer 4.
  • the adhesive layer 5 is in the form of two rigid pads which occupy the opening of the corrugated washer 4 and which cooperate with an intermediate disc 6, capable of being made either of an elastomer or of aluminum .
  • This central disc 6 is intended to improve, by crushing, the elastic pressure effect exerted on the varistors 1.
  • FIG. 8 to 11 Illustrated in fig. 8 to 11 another embodiment of the invention, according to which the intermediate piece provided between the facing faces of the varistors 1 is constituted by an insert 40 comprising a central part integral with radial branches (in number four in the example considered), each of these branches having a wavy profile.
  • Fig. 10 shows the assembly obtained after axial pressure and crushing of the corrugated profile of the insert 40. It was further assumed that the bonding was here ensured by the synthetic material which is overmolded on the insulating body of the arrester for the realization of the outer casing 3, which material is introduced at 30 between the branches of the insert 40.
  • the shape of the intermediate piece 4 or 40 can vary to a large extent, provided that this piece, due to the elastic deformability of its constituent material and having regard to its initial profile, is capable of collapsing during bonding to guarantee a good connection and that said conformation ensures the distribution of the mechanical assembly and electrical connection zones.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Insulated Conductors (AREA)
  • Non-Insulated Conductors (AREA)
  • Filters And Equalizers (AREA)

Abstract

Lightning arrestor device for protection of electric lines, in particular, medium-voltage overhead lines, of the kind comprising a stack which is formed by varistors (1) and end electrodes (2) maintained under axial pressure, and which is arranged inside a sealed protective envelope (3), characterised in that between the elements constituting the stack (1-2) there is provided an insertion piece (4, 40) exhibiting elastic deformability to crushing thus maintaining the quality of the electrical connection between the adjacent elements whilst affording free zones able to receive the layer of adhesive (5, 50, 30) required for the mechanical assembly of said elements. <IMAGE>

Description

La présente invention a trait aux dispositifs parafoudres destinés à la protection des lignes électriques, tout particulièrement des lignes aériennes à moyenne tension.The present invention relates to surge protective devices intended for the protection of power lines, in particular of medium voltage overhead lines.

On connaît des dispositifs de ce genre dans lesquels l'élément d'isolation disposé entre les deux capsules ou électrodes terminales de connexion est constitué par un empilage de varistances à base d'oxyde de zinc (Zn0) maintenues sous pression axiale. Dans les constructions connues, cet empilage et les moyens de pression élastique sont contenus à l'intérieur d'un tube rigide en une matière isolante, lui même gainé par une enveloppe en matière synthétique, l'ensemble formé par lesdits tube et enveloppe conférant à l'empilage précité la résistance mécanique et l'étanchéité nécessaires à l'utilisation pratique du dispositif.Devices of this type are known in which the insulation element arranged between the two capsules or terminal connection electrodes is constituted by a stack of varistors based on zinc oxide (Zn0) maintained under axial pressure. In known constructions, this stack and the elastic pressure means are contained inside a rigid tube made of an insulating material, itself sheathed by a plastic envelope, the assembly formed by said tube and envelope giving the aforementioned stacking the mechanical strength and sealing necessary for the practical use of the device.

Il va de soi que la présence du tube rigide et des moyens élastiques de pression complique et renchérit la fabrication des dispositifs parafoudres. Aussi a-t-on songé à se dispenser d'eux en opérant l'assemblage mécanique direct des varistances et des électrodes terminales, l'ensemble rigide ainsi obtenu étant alors simplement gainé dans une enveloppe isolante de protection. Un tel assemblage peut en principe être opéré par collage, mais il faut évidemment avoir recours à une colle de nature conductrice afin de permettre le passage du courant dans l'empilage ; or les essais ont démontré que les colles conductrices vieillissaient très mal, au point qu'un bon nombre des parafoudres ainsi réalisés perdaient rapidement leur efficacité.It goes without saying that the presence of the rigid tube and of the elastic pressure means complicates and increases the production of the surge protective devices. We have therefore thought of dispensing with them by operating the direct mechanical assembly of the varistors and the terminal electrodes, the rigid assembly thus obtained then being simply sheathed in an insulating protective envelope. Such an assembly can in principle be carried out by gluing, but it is obviously necessary to use an adhesive of a conductive nature in order to allow the passage of current in the stack; However, tests have shown that conductive adhesives age very badly, to the point that many of the surge arresters thus produced quickly lose their effectiveness.

C'est à cet inconvénient qu'entend remédier la présente invention, laquelle a pour objet le dispositif parafoudre défini à la revendication 1.It is to this drawback that the present invention intends to remedy, which relates to the arrester device defined in claim 1.

En fait l'invention consiste à disposer entre les faces en vis-à-vis des éléments constitutifs (varistances et électrodes) de l'empilage d'isolation, des pièces intermédiaires à profil ondulé qui assurent par écrasement la connexion électrique et qui sont profilées pour ménager des zones libres propres à recevoir la couche de colle nécessaire à l'assemblage mutuel des éléments précités.In fact, the invention consists in having between the facing faces of the constituent elements (varistors and electrodes) of the insulation stack, intermediate parts with corrugated profile which by crushing the electrical connection and which are profiled to provide free areas suitable for receiving the adhesive layer necessary for the mutual assembly of the aforementioned elements.

On conçoit qu'on se dispense ainsi de toute colle conductrice et qu'on puisse avoir recours à n'importe quelle substance adhésive, au point que le collage peut en certains cas être assuré par la matière synthétique qui est surmoulée sur l'empilage d'isolation pour constituer l'enveloppe étanche de protection.It is understandable that we thus dispense with any conductive glue and that we can use any adhesive substance, to the point that bonding can in certain cases be ensured by the synthetic material which is overmolded on the insulation stack to constitute the waterproof protective envelope.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :

  • Fig. 1 est une coupe axiale schématique d'un dispositif parafoudre établi conformément à la présente invention.
  • Fig. 2 est une vue en perspective illustrant un premier mode de mise en oeuvre de l'invention, les pièces étant représentées avant assemblage.
  • Fig. 3 est une coupe verticale montrant les pièces après assemblage par pression et collage.
  • Fig. 4 et 5, respectivement 6 et 7, représentent de manière semblable deux variantes de réalisation.
  • Fig. 8 à 11 illustrent un second mode de mise en oeuvre de l'invention.
The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:
  • Fig. 1 is a schematic axial section of a lightning arrester device established in accordance with the present invention.
  • Fig. 2 is a perspective view illustrating a first embodiment of the invention, the parts being shown before assembly.
  • Fig. 3 is a vertical section showing the parts after assembly by pressure and gluing.
  • Fig. 4 and 5, respectively 6 and 7, similarly represent two alternative embodiments.
  • Fig. 8 to 11 illustrate a second embodiment of the invention.

Le dispositif représenté en fig. 1 comprend essentiellement un élément d'isolation formé par l'assemblage rigide et résistant d'un empilage de varistances 1 maintenues sous pression entre deux électrodes terminales de connexion 2, lequel élément 1-2 est recouvert de manière étanche par une enveloppe isolante 3 qui avec ses saillies annulaires 3a est directement obtenue par surmoulage d'une matière synthétique sur ledit élément.The device shown in fig. 1 essentially comprises an insulation element formed by the rigid and resistant assembly of a stack of varistors 1 maintained under pressure between two terminal connection electrodes 2, which element 1-2 is covered in a sealed manner by an insulating envelope 3 which with annular projections 3a is directly obtained by overmoulding a synthetic material on said member.

Il convient ici d'observer que si dans les développements qui vont suivre, le mode d'assemblage suivant l'invention a été décrit et illustré comme intéressant deux varistances 1 superposées, les explications doivent être considérées comme valables en ce qui concerne l'assemblage de chacune des électrodes 2 avec la varistance 1 d'extrémité.It should be noted here that if in the following developments, the assembly method according to the invention has been described and illustrated as interesting two superimposed varistors 1, the explanations must be considered valid with regard to the assembly of each of the electrodes 2 with the varistor 1 at the end.

Le mode de mise en oeuvre représenté en fig. 2 et 3 fait appel à une pièce intercalaire 4 formée par une rondelle à profil ondulé dont le diamètre extérieur est légèrement inférieur à celui de chacune des varistances 1. Sur la face transversale de chacune de celles-ci on a déposé, par exemple par un procédé de sérigraphie, une couche de colle 5 sous la forme d'un disque dont le diamètre est inférieur au diamètre intérieur de la rondelle ondulée 4.The mode of implementation shown in fig. 2 and 3 uses a intermediate piece 4 formed by a washer with a corrugated profile, the outside diameter of which is slightly less than that of each of the varistors 1. On the transverse face of each of these is deposited, for example by a screen printing process, a layer of glue 5 in the form of a disc, the diameter of which is less than the inside diameter of the corrugated washer 4.

On conçoit que si on applique une pression axiale sur les deux varistances 1 superposées avec interposition de la rondelle 4, on obtient l'assemblage montré en fig. 3 et l'on peut constater que la rondelle 4 se trouve écrasée entre les deux varistances 1, liées l'une à l'autre par la colle provenant des disques 5. La connexion électrique est assurée dans de très bonnes conditions par la rondelle 4 à l'état écrasé, tandis que le collage en 5 permet l'obtention d'un ensemble rigide et résistant.It is understood that if an axial pressure is applied to the two varistors 1 superimposed with the interposition of the washer 4, the assembly shown in fig. 3 and it can be seen that the washer 4 is crushed between the two varistors 1, linked to one another by the glue coming from the discs 5. The electrical connection is ensured in very good conditions by the washer 4 in the crushed state, while the bonding in 5 makes it possible to obtain a rigid and resistant assembly.

La variante suivant fig. 4 et 5 ne se distingue de la forme de réalisation qui précède qu'en ce que chaque disque de colle 5 est doublé par un anneau de colle 50 qui entoure la rondelle 4.The variant according to fig. 4 and 5 differs from the preceding embodiment only in that each adhesive disc 5 is lined with an adhesive ring 50 which surrounds the washer 4.

Dans la variante suivant fig. 6 et 7, la couche de colle 5 se présente sous la forme de deux pastilles rigides qui occupent l'ouverture de la rondelle ondulée 4 et qui coopèrent avec un disque intermédiaire 6, susceptible d'être réalisé soit en un élastomère, soit en aluminium. Ce disque central 6 est destiné à améliorer, par écrasement, l'effet de pression élastique exercé sur les varistances 1.In the variant according to fig. 6 and 7, the adhesive layer 5 is in the form of two rigid pads which occupy the opening of the corrugated washer 4 and which cooperate with an intermediate disc 6, capable of being made either of an elastomer or of aluminum . This central disc 6 is intended to improve, by crushing, the elastic pressure effect exerted on the varistors 1.

On a illustré en fig. 8 à 11 un autre mode de mise en oeuvre de l'invention, suivant lequel la pièce intercalaire prévue entre les faces en vis-à-vis des varistances 1 est constitué par un insert 40 conprenant une partie centrale solidaire de branches radiales (au nombre de quatre dans l'exemple considéré), chacune de ces branches présentant un profil ondulé. Fig. 10 montre l'assemblage obtenu après pression axiale et écrasement du profil ondulé de l'insert 40. On a en outre supposé que le collage était ici assuré par la matière synthétique qui est surmoulée sur le corps isolant du parafoudre pour la réalisation de l'enveloppe extérieure 3, laquelle matière s'introduit en 30 entre les branches de l'insert 40.Illustrated in fig. 8 to 11 another embodiment of the invention, according to which the intermediate piece provided between the facing faces of the varistors 1 is constituted by an insert 40 comprising a central part integral with radial branches (in number four in the example considered), each of these branches having a wavy profile. Fig. 10 shows the assembly obtained after axial pressure and crushing of the corrugated profile of the insert 40. It was further assumed that the bonding was here ensured by the synthetic material which is overmolded on the insulating body of the arrester for the realization of the outer casing 3, which material is introduced at 30 between the branches of the insert 40.

Il va de soi que la conformation de la pièce intercalaire 4 ou 40 peut varier dans une large mesure, pour autant que cette pièce, de par la déformabilité élastique de sa matière constitutive et eu égard à son profil initial, soit propre à s'écraser lors du collage pour garantir une bonne connexion et que ladite conformation assure bien la répartition des zones d'assemblage mécanique et de connexion électrique.It goes without saying that the shape of the intermediate piece 4 or 40 can vary to a large extent, provided that this piece, due to the elastic deformability of its constituent material and having regard to its initial profile, is capable of collapsing during bonding to guarantee a good connection and that said conformation ensures the distribution of the mechanical assembly and electrical connection zones.

Claims (7)

Dispositif parafoudre pour la protection des lignes électriques, notamment des lignes aériennes à moyenne tension, du genre comprenant un empilage qui est formé par des varistances (1) et des électrodes terminales (2) maintenues sous pression axiale et qui est disposé à l'intérieur d'une enveloppe étanche de protection (3), caractérisé en ce qu'entre les éléments constitutifs de l'empilage (1-2) est prévue une pièce intercalaire (4, 40) qui présente une déformabilité élastique à l'écrasement maintenant ainsi la qualité de la connexion électrique entre les éléments adjacents tout et qui est profilée pour ménager des zones libres propres à recevoir la couche de colle (5, 50, 30) nécessaire à l'assemblage mécanique desdits éléments.Lightning arrester device for the protection of electric lines, in particular medium voltage overhead lines, of the type comprising a stack which is formed by varistors (1) and terminal electrodes (2) maintained under axial pressure and which is arranged inside a waterproof protective envelope (3), characterized in that between the constituent elements of the stack (1-2) is provided an intermediate piece (4, 40) which has elastic deformability to crushing thus maintaining the quality of the electrical connection between all adjacent elements and which is profiled to provide free areas suitable for receiving the layer of adhesive (5, 50, 30) necessary for the mechanical assembly of said elements. Dispositif suivant la revendication 1, caractérisé en ce que la pièce intercalaire est constituée par une rondelle (4).Device according to claim 1, characterized in that the intermediate piece is constituted by a washer (4). Dispositif suivant la revendication 1, caractérisé en ce que la pièce intercalaire est constituée par un insert (40) présentant une partie centrale pleine et une série de branches radiales à profil ondulé.Device according to claim 1, characterized in that the intermediate piece consists of an insert (40) having a solid central part and a series of radial branches with a wavy profile. Dispositif suivant l'une quelconque des revendications 1 à 2, caractérisé en ce que la colle d'assemblage se présente sous la forme d'un disque (5) qui occupe la zone centrale des faces transversales d'extrémité des varistances (1) et des électrodes (2).Device according to any one of Claims 1 to 2, characterized in that the assembly adhesive is in the form of a disc (5) which occupies the central region of the transverse end faces of the varistors (1) and electrodes (2). Dispositif suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que la colle d'assemblage se présente sous la forme d'un anneau (50) disposé autour de la pièce intercalaire (4, 40).Device according to any one of Claims 1 to 3, characterized in that the assembly adhesive is in the form of a ring (50) arranged around the intermediate piece (4, 40). Dispositif suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que la colle est constituée par la couche (30) de la matière synthétique qui forme l'enveloppe (3), directement surmoulée sur l'empilage (1-2).Device according to any one of Claims 1 to 3, characterized in that the adhesive consists of the layer (30) of the synthetic material which forms the envelope (3), directly overmolded on the stack (1-2) . Dispositif suivant l'une quelconque des revendications 1, 2, 4, 5 et 6, caractérisé en ce qu'à la pièce intercalaire (4, 40) est associé un disque intermédiaire (6) en élastomère ou en aluminium, propre à améliorer par écrasement l'effet de pression élastique exercé sur l'empilage (1-2).Device according to any one of claims 1, 2, 4, 5 and 6, characterized in that the intermediate piece (4, 40) is associated with an intermediate disc (6) made of elastomer or aluminum, suitable for improving by crushing the elastic pressure effect exerted on the stack (1-2).
EP91420071A 1990-03-02 1991-03-01 Lightning arrestor device for the protection of electric lines Expired - Lifetime EP0445054B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9002897 1990-03-02
FR9002897A FR2659169B1 (en) 1990-03-02 1990-03-02 SURGE PROTECTION DEVICE FOR THE PROTECTION OF ELECTRICAL LINES.

Publications (2)

Publication Number Publication Date
EP0445054A1 true EP0445054A1 (en) 1991-09-04
EP0445054B1 EP0445054B1 (en) 1994-12-14

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EP91420071A Expired - Lifetime EP0445054B1 (en) 1990-03-02 1991-03-01 Lightning arrestor device for the protection of electric lines

Country Status (8)

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EP (1) EP0445054B1 (en)
AT (1) ATE115762T1 (en)
CA (1) CA2037115A1 (en)
DE (1) DE69105779T2 (en)
DK (1) DK0445054T3 (en)
ES (1) ES2065653T3 (en)
FR (1) FR2659169B1 (en)
TR (1) TR25323A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0545038A1 (en) * 1991-12-04 1993-06-09 Asea Brown Boveri Ag Surge arrester
DE4306691A1 (en) * 1993-03-04 1994-11-03 Abb Management Ag Surge arresters
WO2001006522A2 (en) * 1999-07-19 2001-01-25 Siemens Aktiengesellschaft Surge arrester
WO2001067467A1 (en) * 2000-03-07 2001-09-13 Tyco Electronics Corporation Overvoltage protection device including wafer of varistor material
US7433169B2 (en) 2005-12-15 2008-10-07 Raycap Corporation Overvoltage protection devices including wafer of varistor material
US8743525B2 (en) 2012-06-19 2014-06-03 Raycap Intellectual Property, Ltd Overvoltage protection devices including wafer of varistor material
US9906017B2 (en) 2014-06-03 2018-02-27 Ripd Research And Ip Development Ltd. Modular overvoltage protection units
US10319545B2 (en) 2016-11-30 2019-06-11 Iskra Za{hacek over (s)}{hacek over (c)}ite d.o.o. Surge protective device modules and DIN rail device systems including same
US10340110B2 (en) 2017-05-12 2019-07-02 Raycap IP Development Ltd Surge protective device modules including integral thermal disconnect mechanisms and methods including same
US10447026B2 (en) 2016-12-23 2019-10-15 Ripd Ip Development Ltd Devices for active overvoltage protection
US10685767B2 (en) 2017-09-14 2020-06-16 Raycap IP Development Ltd Surge protective device modules and systems including same
US10707678B2 (en) 2016-12-23 2020-07-07 Ripd Research And Ip Development Ltd. Overvoltage protection device including multiple varistor wafers
US11223200B2 (en) 2018-07-26 2022-01-11 Ripd Ip Development Ltd Surge protective devices, circuits, modules and systems including same
US11723145B2 (en) 2021-09-20 2023-08-08 Raycap IP Development Ltd PCB-mountable surge protective device modules and SPD circuit systems and methods including same
US11862967B2 (en) 2021-09-13 2024-01-02 Raycap, S.A. Surge protective device assembly modules
US11990745B2 (en) 2022-01-12 2024-05-21 Raycap IP Development Ltd Methods and systems for remote monitoring of surge protective devices

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ES2166689B1 (en) * 2000-01-26 2003-10-16 Ind De Aparellaje Electrico S SURVEY DOWNLOADER.

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EP0281945A1 (en) * 1987-03-06 1988-09-14 Sediver, Societe Europeenne D'isolateurs En Verre Et Composite Manufacturing process for a lightning arrester
EP0304690A1 (en) * 1987-08-06 1989-03-01 Sediver, Societe Europeenne D'isolateurs En Verre Et Composite Production process for a lightning arrester, and lightning arrester obtained by this process

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DE3544141A1 (en) * 1984-12-14 1986-06-26 Hubbell Inc Harvey WINDED ELECTRICAL ARRANGEMENTS AND METHOD FOR PRODUCING SUCH
EP0281945A1 (en) * 1987-03-06 1988-09-14 Sediver, Societe Europeenne D'isolateurs En Verre Et Composite Manufacturing process for a lightning arrester
EP0304690A1 (en) * 1987-08-06 1989-03-01 Sediver, Societe Europeenne D'isolateurs En Verre Et Composite Production process for a lightning arrester, and lightning arrester obtained by this process

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0545038A1 (en) * 1991-12-04 1993-06-09 Asea Brown Boveri Ag Surge arrester
CH682858A5 (en) * 1991-12-04 1993-11-30 Asea Brown Boveri Surge arresters.
US5291366A (en) * 1991-12-04 1994-03-01 Asea Brown Boveri Ltd. Surge voltage arrester
DE4306691A1 (en) * 1993-03-04 1994-11-03 Abb Management Ag Surge arresters
US5517382A (en) * 1993-03-04 1996-05-14 Abb Management Ag Surge suppressor having looped clamping elements
US6430020B1 (en) 1998-09-21 2002-08-06 Tyco Electronics Corporation Overvoltage protection device including wafer of varistor material
WO2001006522A3 (en) * 1999-07-19 2001-10-04 Siemens Ag Surge arrester
WO2001006522A2 (en) * 1999-07-19 2001-01-25 Siemens Aktiengesellschaft Surge arrester
WO2001067467A1 (en) * 2000-03-07 2001-09-13 Tyco Electronics Corporation Overvoltage protection device including wafer of varistor material
AU2001243350B2 (en) * 2000-03-07 2005-12-01 Raycap Corporation Overvoltage protection device including wafer of varistor material
US7433169B2 (en) 2005-12-15 2008-10-07 Raycap Corporation Overvoltage protection devices including wafer of varistor material
US8743525B2 (en) 2012-06-19 2014-06-03 Raycap Intellectual Property, Ltd Overvoltage protection devices including wafer of varistor material
US9906017B2 (en) 2014-06-03 2018-02-27 Ripd Research And Ip Development Ltd. Modular overvoltage protection units
US10340688B2 (en) 2014-06-03 2019-07-02 Ripd Ip Assets Ltd Modular overvoltage protection units
US10734176B2 (en) 2016-11-30 2020-08-04 Raycap, Surge Protective Devices, Ltd. Surge protective device modules and DIN rail device systems including same
US10319545B2 (en) 2016-11-30 2019-06-11 Iskra Za{hacek over (s)}{hacek over (c)}ite d.o.o. Surge protective device modules and DIN rail device systems including same
US11165246B2 (en) 2016-12-23 2021-11-02 Ripd Research And Ip Development Ltd. Overvoltage protection device including multiple varistor wafers
US10707678B2 (en) 2016-12-23 2020-07-07 Ripd Research And Ip Development Ltd. Overvoltage protection device including multiple varistor wafers
US10447026B2 (en) 2016-12-23 2019-10-15 Ripd Ip Development Ltd Devices for active overvoltage protection
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Also Published As

Publication number Publication date
ES2065653T3 (en) 1995-02-16
ATE115762T1 (en) 1994-12-15
EP0445054B1 (en) 1994-12-14
DE69105779D1 (en) 1995-01-26
DE69105779T2 (en) 1995-04-27
FR2659169A1 (en) 1991-09-06
TR25323A (en) 1993-01-01
FR2659169B1 (en) 1992-06-19
CA2037115A1 (en) 1991-09-03
DK0445054T3 (en) 1995-01-23

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