EP2738778A1 - Surge suppressor with disc-shaped varistors - Google Patents

Surge suppressor with disc-shaped varistors Download PDF

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Publication number
EP2738778A1
EP2738778A1 EP13193541.3A EP13193541A EP2738778A1 EP 2738778 A1 EP2738778 A1 EP 2738778A1 EP 13193541 A EP13193541 A EP 13193541A EP 2738778 A1 EP2738778 A1 EP 2738778A1
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EP
European Patent Office
Prior art keywords
housing
overvoltage protection
protection arrangement
arrangement according
shaped
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Granted
Application number
EP13193541.3A
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German (de)
French (fr)
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EP2738778B1 (en
Inventor
Jens Ehrler
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Dehn SE and Co KG
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Dehn and Soehne GmbH and Co KG
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Publication of EP2738778A1 publication Critical patent/EP2738778A1/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
    • H01C7/102—Varistor boundary, e.g. surface layers
    • 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 invention relates to an overvoltage protection arrangement with disc-shaped varistor, which is arranged inside a housing enclosing a cavity and is electrically contacted, according to the preamble of claim 1.
  • From the DE 601 12 410 T2 is a device for overvoltage protection, comprising a varistor disc, previously known.
  • the local device is based on a housing having a cavity with an opening.
  • a side wall and a bottom wall with a contact surface are present, said contact surface forms an elevated platform.
  • an electrode member with a further contact surface is present, which is opposite to the first-mentioned contact surface and which is arranged in the cavity.
  • the housing and the electrode member are arranged and configured with respect to one another such that the wafer-like disc-shaped varistor can be accommodated in the cavity and electrical contacting is possible.
  • a housing with a cavity and an electrode member with contact surface For the overvoltage protection device with a varistor material disc after DE 699 32 170 T2 is again assumed by a housing with a cavity and an electrode member with contact surface. Furthermore, a wafer formed from varistor material is also present there, which comprises a first and a second, mutually opposite, essentially flat wafer surface together with contact area. The wafer is introduced into the cavity of the housing and pressure-contacted. For pressure contact, a spring member is present as a biasing means. In particular, a spring washer is used for the purpose of quasi-cylindrical, central contacting. In addition, the housing opening is closed with an end cap which includes a threaded portion to maintain the required contacting force under all circumstances.
  • the housing wall acts after DE 699 32 170 T2 Also as an electrode wall and is so far with one side of the disc-shaped varistor in connection. Said electrode wall forms a thermal mass that is greater than the thermal mass of the wafer.
  • Subclaims include at least expedient refinements and developments.
  • the housing is designed as a polygonal body, in particular multi-sided prism, cube, cuboid or tetrahedron and has an opening for introducing a plurality of disc-shaped varistors.
  • the varistors each come into mechanical contact with a portion or part of the housing side inner wall or come into abutment with the housing side inner wall.
  • varistors Between the used varistors and the housing wall it is possible to use means for improving the electrical contact.
  • This can e.g. be conductive pastes or even resilient contact electrodes or the like.
  • Another way of better contacting between the varistor and the housing consists in a defined surface design of the housing at the contact location between the housing and varistor.
  • circular depressions or elevations may be present on the housing wall, which optimize the contact, but also prevent sliding over the front sides of the corresponding Varistoruse.
  • a housing e.g. frame-shaped or frame-like Isolierstoff devis located, which fixes the disc-shaped varistors at a distance from each other.
  • the Isolierstoffinger is modeled in a preferred embodiment of the polygonal body framework and thus uses the available maximum cavity.
  • the varistor disks can already be used on the insulator insert, e.g. be fixed by clamping, in which case the module made of insulating material insert and Varistorin is thus introduced into the polygonal body.
  • a contacting body is introduced, which comes into operative connection with the free side surfaces of the varistor disks and contact elements located there.
  • This contacting body may e.g. a cross-shaped, star-shaped or similar type of body having corresponding to the number of free to be contacted side surfaces of the varistors contact extensions or contact surfaces.
  • the varistor disks are mechanically clamped within the housing and thus fastened and simultaneously electrically contacted.
  • Ausgestaltend may be formed on or in the housing at least one threaded bolt, which serves for fastening the arrangement and / or the electricallytagêt.
  • the bolt can also be realized as a passage bolt.
  • the housing consists of an electrically conductive material, it is preferable to choose such a material, which at the same time forms an optimum heat sink.
  • the opening of the housing or the portion around the threaded bolt can be closed by means of a lid or a cap, which still have sealing means according to the respective purpose or degree of protection lid or cap.
  • the disk-shaped varistors are primarily positively locked in the housing, which brings advantages for both mounting as well as a conceivable disassembly, since solder joints can be omitted.
  • the Isolierstoff pills guide sections, guide grooves or guide channels for receiving the disc-shaped varistors have, with the result of further ease of assembly and improved short circuit safety and the realization of an increased separation distance.
  • a viscous or liquid insulating material eg as a resin-hardener mixture is introduced.
  • the varistor disks can then be used and it results in a defined position of the varistors to each other after completion of the curing process. In this sense it is possible, first the aforementioned viscous resin hardener component, forming a frame to inject into the housing and insert the varistors in the housing at a next step and fix.
  • the Fig. 1 (Longitudinal section on the left side, cross section on the right side) shows a cube-shaped polygonal body 1, which has varistor disks 2 at its housing side inner wall sections.
  • varistor disks 2 at its housing side inner wall sections.
  • a threaded bolt 3 is provided for mechanically securing the assembly.
  • Fig. 2 starts first from a square polygon body, which consists of a conductive material, in particular metal.
  • This body is open at the top ( Fig. 2 . 1 ., right side).
  • the four metal oxide varistors can be introduced in disc form.
  • the contact body 5 is formed in a cross shape and communicates with a bolt-like inner electrode 6, which is provided with a thread 7 in order to fix an electrical connection means and / or to fix the overall arrangement to a carrier.
  • the Fig. 3 shows a detailed representation of two disc-shaped varistors 2 with a corner region of the insulating insert 4 for laterally fixing the Varistort 2 in terms of a guide section or guide channel.
  • one-sided threaded fastener or connecting bolt can also be designed as a through-bolt, without departing from the spirit of the invention.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)

Abstract

The overvoltage protection arrangement has a disc-shaped varistor (2) that is electrically connected with a cavity which is provided in a housing portion (1). The housing portion is formed in multi-sided prism shape, cube shape, parallelepiped shape or tetrahedron shape. The housing portion is provided with an aperture for the introduction of several disc-shaped varistors which are connected to a section of the housing side inner wall in mechanical connection manner.

Description

Die Erfindung betrifft eine Überspannungsschutzanordnung mit scheibenförmigem Varistor, welcher innerhalb eines, einen Hohlraum einschließenden Gehäuses angeordnet und elektrisch kontaktiert ist, gemäß Oberbegriff des Anspruchs 1.The invention relates to an overvoltage protection arrangement with disc-shaped varistor, which is arranged inside a housing enclosing a cavity and is electrically contacted, according to the preamble of claim 1.

Aus der DE 601 12 410 T2 ist eine Vorrichtung zum Überspannungsschutz, umfassend eine Varistorscheibe, vorbekannt.From the DE 601 12 410 T2 is a device for overvoltage protection, comprising a varistor disc, previously known.

Die dortige Vorrichtung geht von einem Gehäuse aus, das einen Hohlraum mit Öffnung besitzt. Im Gehäuse sind eine Seitenwand sowie eine Bodenwand mit einer Kontaktfläche vorhanden, wobei diese Kontaktfläche eine erhöhte Plattform bildet. Weiterhin ist ein Elektrodenglied mit einer weiteren Kontaktfläche vorhanden, die der erstgenannten Kontaktfläche gegenüberliegt und welches im Hohlraum angeordnet ist. Das Gehäuse und das Elektrodenglied sind so zueinander angeordnet und konfiguriert, dass der waferartige, scheibenförmige Varistor im Hohlraum aufgenommen werden kann und eine elektrische Kontaktierung möglich ist.The local device is based on a housing having a cavity with an opening. In the housing, a side wall and a bottom wall with a contact surface are present, said contact surface forms an elevated platform. Furthermore, an electrode member with a further contact surface is present, which is opposite to the first-mentioned contact surface and which is arranged in the cavity. The housing and the electrode member are arranged and configured with respect to one another such that the wafer-like disc-shaped varistor can be accommodated in the cavity and electrical contacting is possible.

Bei der Überspannungsschutzeinrichtung mit einer Varistormaterialscheibe nach DE 699 32 170 T2 wird wiederum von einem Gehäuse mit einem Hohlraum und einem Elektrodenglied mit Kontaktfläche ausgegangen. Weiterhin ist auch dort ein aus Varistormaterial geformter Wafer vorhanden, der eine erste und eine zweite, einander gegenüberliegende, im Wesentlichen ebene Waferoberfläche nebst Kontaktbereich umfasst. Der Wafer wird in den Hohlraum des Gehäuses eingebracht und druckkontaktiert. Zur Druckkontaktierung ist ein Federglied als Vorspannmittel vorhanden. Insbesondere wird eine Federscheibe zum Zweck der quasi zylindrischen, zentrischen Kontaktierung eingesetzt. Darüber hinaus wird die Gehäuseöffnung mit einer Endkappe verschlossen, die einen Gewindeteil umfasst, um die erforderliche Kontaktierungs-Kraftwirkung unter allen eintretenden Umständen aufrechtzuerhalten.For the overvoltage protection device with a varistor material disc after DE 699 32 170 T2 is again assumed by a housing with a cavity and an electrode member with contact surface. Furthermore, a wafer formed from varistor material is also present there, which comprises a first and a second, mutually opposite, essentially flat wafer surface together with contact area. The wafer is introduced into the cavity of the housing and pressure-contacted. For pressure contact, a spring member is present as a biasing means. In particular, a spring washer is used for the purpose of quasi-cylindrical, central contacting. In addition, the housing opening is closed with an end cap which includes a threaded portion to maintain the required contacting force under all circumstances.

Die Gehäusewandung wirkt nach DE 699 32 170 T2 auch als Elektrodenwand und steht insofern mit einer Seite des scheibenförmigen Varistors in Verbindung. Die genannte Elektrodenwand bildet eine thermisch wirksame Masse, die größer ist als die thermisch wirksame Masse des Wafers.The housing wall acts after DE 699 32 170 T2 Also as an electrode wall and is so far with one side of the disc-shaped varistor in connection. Said electrode wall forms a thermal mass that is greater than the thermal mass of the wafer.

Den vorgestellten technischen Lösungen ist gemeinsam, dass zwar prinzipiell in den zylindrisch ausgeführten Gehäusen auch mehrere Varistorscheiben quasi als Stapelanordnung eingebracht werden können, jedoch bildet dann eine derartige Stapelanordnung elektrisch gesehen lediglich eine Reihenschaltung. Eine Parallelschaltung der einzelnen Wafer bzw. Varistorscheiben ist ohne aufwendige technische Maßnahmen der Zwischenisolation und der Verbindungsleitungsführung nicht möglich, was zum einen den konstruktiven Aufwand erhöht sowie zum anderen zu thermischen Nachteilen führt.The presented technical solutions have in common that, although in principle in the cylindrically designed housings, a plurality of varistor disks can be introduced as a quasi stack arrangement, however, such a stack arrangement then forms, in electrical terms, only a series connection. A parallel connection of the individual wafers or varistor disks is not possible without expensive technical measures of the intermediate insulation and the connecting line guide, which on the one hand increases the constructive effort and on the other leads to thermal disadvantages.

Aus dem Vorgenannten ist es daher Aufgabe der Erfindung, eine weiterentwickelte Überspannungsschutzanordnung auf der Basis von scheibenförmigen Varistoren anzugeben, wobei mindestens ein, vorzugsweise mehrere Varistoren innerhalb eines, einen Hohlraum einschließenden Gehäuses angeordnet und elektrisch kontaktiert sind, wobei die Kontaktierung in besonders einfacher Weise eine Parallelschaltung der Varistorscheiben ermöglichen soll.From the foregoing, it is therefore an object of the invention to provide a further developed overvoltage protection arrangement on the basis of disc-shaped varistors, wherein at least one, preferably a plurality of varistors are arranged within a, a cavity enclosing housing and electrically contacted, the contacting in a particularly simple manner a parallel connection to allow the Varistorscheiben.

Die Lösung der Aufgabe der Erfindung erfolgt durch die Überspannungsschutzanordnung gemäß Merkmalskombination nach Anspruch 1, wobei dieThe object of the invention is achieved by the overvoltage protection arrangement according to feature combination according to claim 1, wherein the

Unteransprüche mindestens zweckmäßige Ausgestaltungen und Weiterbildungen umfassen.Subclaims include at least expedient refinements and developments.

Es wird demnach von einer Überspannungsschutzanordnung mit scheibenförmigem Varistor ausgegangen, welcher innerhalb eines, einen Hohlraum einschließenden Gehäuses angeordnet und elektrisch kontaktiert ist.It is therefore assumed that an overvoltage protection arrangement with disk-shaped varistor, which is disposed within a, a cavity enclosing housing and electrically contacted.

Erfindungsgemäß ist das Gehäuse als Vieleckkörper, insbesondere mehrseitiges Prisma, Würfel, Quader oder Tetraeder ausgebildet und weist eine Öffnung zum Einbringen mehrerer scheibenförmiger Varistoren auf. Die Varistoren kommen jeweils mit einem Abschnitt oder einem Teil der Gehäuseseiteninnenwandung in mechanischen Kontakt bzw. kommen mit der Gehäuseseiteninnenwandung in Anlage.According to the invention, the housing is designed as a polygonal body, in particular multi-sided prism, cube, cuboid or tetrahedron and has an opening for introducing a plurality of disc-shaped varistors. The varistors each come into mechanical contact with a portion or part of the housing side inner wall or come into abutment with the housing side inner wall.

Durch diese üblicherweise großflächige Anlage an den entsprechenden ebenen Teil des Gehäuseseiteninnenwandungsabschnitts ist bei einem leitfähigen Gehäuse oder einer leitfähigen Gehäuseinnenseitenbeschichtung eine einfache elektrische Kontaktierung zur gewünschten Parallelschaltung möglich. Weiterhin schaffen die großflächige Verbindung und das diesbezügliche Inkontaktkommen der Varistorscheibe mit der Gehäuseseitenwand einen guten thermischen Übergang zum Zweck des Ableitens von Verlustwärme.By this usually large-scale contact with the corresponding planar part of the Gehäuseiteninnenwandungsabschnitts a simple electrical contact with the desired parallel connection is possible with a conductive housing or a conductive housing inner side coating. Furthermore, the large-area connection and the related contacting of the varistor disc with the side wall of the housing provide a good thermal transition for the purpose of dissipating heat loss.

Zwischen den einzusetzenden Varistoren und der Gehäusewandung besteht die Möglichkeit, Mittel zur Verbesserung der elektrischen Kontaktierung einzusetzen. Dies können z.B. leitfähige Pasten sein oder aber auch federnde Kontaktelektroden oder dergleichen.Between the used varistors and the housing wall it is possible to use means for improving the electrical contact. This can e.g. be conductive pastes or even resilient contact electrodes or the like.

Eine weitere Möglichkeit der besseren Kontaktierung zwischen Varistor und Gehäusewandung besteht in einer definierten Oberflächengestaltung des Gehäuses am Kontaktort zwischen Gehäuse und Varistor. Hier können kreisförmige Vertiefungen oder Erhöhungen an der Gehäusewand vorhanden sein, die die Kontaktierung optimieren, aber auch Gleitüberschläge bezüglich der Stirnseiten der entsprechenden Varistorscheibe verhindern.Another way of better contacting between the varistor and the housing consists in a defined surface design of the housing at the contact location between the housing and varistor. Here, circular depressions or elevations may be present on the housing wall, which optimize the contact, but also prevent sliding over the front sides of the corresponding Varistorscheibe.

Durch die Zugänglichkeit des Gehäuses über die erwähnte Öffnung und die Form des Gehäuses als Vieleckkörper können bei einer Ausführungsform der Erfindung einzelne Varistorscheiben im Bedarfsfall ausgetauscht und gewechselt werden, was bei einer üblicherweise verschraubten Stapelanordnung ohne weiteres nicht möglich ist.Due to the accessibility of the housing via the mentioned opening and the shape of the housing as polygonal body can in one embodiment the invention individual Varistorscheiben be replaced if necessary, and changed, which is not possible in a usually bolted stack assembly readily.

Bei einer bevorzugten Ausführungsform der Erfindung ist im Gehäuse ein, z.B. rahmenförmiger oder gestellartiger Isolierstoffeinsatz befindlich, welcher die scheibenförmigen Varistoren in einem Abstand zueinander fixiert.In a preferred embodiment of the invention, a housing, e.g. frame-shaped or frame-like Isolierstoffeinsatz located, which fixes the disc-shaped varistors at a distance from each other.

Der Isolierstoffeinsatz wird bei einer bevorzugten Ausführungsform dem Vieleckkörpergerüst nachempfunden und nutzt demnach den zur Verfügung stehenden Hohlraum maximal aus.The Isolierstoffeinsatz is modeled in a preferred embodiment of the polygonal body framework and thus uses the available maximum cavity.

Montageseitig besteht die Möglichkeit, zunächst den Vieleckkörper zu fertigen, anschließend den Isolierstoffeinsatz in den Hohlraum des Vieleckkörpers einzubringen, um hiernach die Varistorscheiben zu fixieren.On the mounting side, it is possible to first manufacture the polygonal body, then introduce the Isolierstoffeinsatz into the cavity of the polygon body to fix hereafter the Varistorscheiben.

Alternativ können aber auch die Varistorscheiben bereits am Isolierstoffeinsatz, z.B. klemmend fixiert werden, wobei dann das so gefertigte Modul aus Isolierstoffeinsatz und Varistorscheiben in den Vieleckkörper eingebracht wird.Alternatively, however, the varistor disks can already be used on the insulator insert, e.g. be fixed by clamping, in which case the module made of insulating material insert and Varistorscheiben is thus introduced into the polygonal body.

Im nach dem Einsetzen der Varistoren verbleibenden Hohlraum des Gehäuses wird ein Kontaktierungskörper eingebracht, welcher mit den freien Seitenflächen der Varistorscheiben und dort befindlichen Kontakt-elementen in Wirkverbindung gelangt.In the remaining after insertion of the varistors cavity of the housing, a contacting body is introduced, which comes into operative connection with the free side surfaces of the varistor disks and contact elements located there.

Dieser Kontaktierungskörper kann z.B. ein kreuzförmiger, sternförmiger oder ähnlich gearteter Körper sein, der entsprechend der Anzahl der freien zu kontaktierenden Seitenflächen der Varistoren Kontaktfortsätze oder Kontaktflächen besitzt.This contacting body may e.g. a cross-shaped, star-shaped or similar type of body having corresponding to the number of free to be contacted side surfaces of the varistors contact extensions or contact surfaces.

Mit Hilfe eines Verschwenkens oder Verdrehens des Kontaktierungskörpers besteht die Möglichkeit, für eine sichere elektrische und mechanische Verbindung der Konstruktion, umfassend Varistorscheiben, Isolierstoffeinsatz und Gehäuse Sorge zu tragen.By means of pivoting or twisting of the contacting body, it is possible to provide for a secure electrical and mechanical connection of the construction, comprising varistor disks, insulating material insert and housing.

Es werden also mittels des Kontaktierungskörpers die Varistorscheiben mechanisch innerhalb des Gehäuses verspannt und dadurch befestigt und gleichzeitig elektrisch kontaktiert.Thus, by means of the contacting body, the varistor disks are mechanically clamped within the housing and thus fastened and simultaneously electrically contacted.

Ausgestaltend kann am oder im Gehäuse mindestens ein Gewindebolzen ausgebildet sein, welcher zur Befestigung der Anordnung und/oder der elektrischen Außenkontaktierung dient.Ausgestaltend may be formed on or in the housing at least one threaded bolt, which serves for fastening the arrangement and / or the electrical Außenkontaktierung.

Der Bolzen kann auch als Durchgangsbolzen realisiert werden.The bolt can also be realized as a passage bolt.

Wenn das Gehäuse aus einem elektrisch leitfähigen Material besteht, ist bevorzugt ein solches Material zu wählen, was auch gleichzeitig eine optimale Wärmesenke bildet.If the housing consists of an electrically conductive material, it is preferable to choose such a material, which at the same time forms an optimum heat sink.

Die Öffnung des Gehäuses bzw. der Abschnitt um den Gewindebolzen kann mit Hilfe eines Deckels oder einer Kappe verschlossen werden, wobei entsprechend dem jeweiligen Einsatzzweck oder Schutzgrad Deckel oder Kappe noch über Dichtmittel verfügen.The opening of the housing or the portion around the threaded bolt can be closed by means of a lid or a cap, which still have sealing means according to the respective purpose or degree of protection lid or cap.

Die scheibenförmigen Varistoren sind primär kraftschlüssig im Gehäuse befestigt, was sowohl für die Montage als auch eine denkbare Demontage Vorteile bringt, da Lötverbindungen entfallen können.The disk-shaped varistors are primarily positively locked in the housing, which brings advantages for both mounting as well as a conceivable disassembly, since solder joints can be omitted.

In einer Ausgestaltung der Erfindung kann der Isolierstoffeinsatz Führungsabschnitte, Führungsnuten oder Führungskanäle zur Aufnahme der scheibenförmigen Varistoren besitzen, mit der Folge einer weiteren Montageerleichterung und einer verbesserten Kurzschlusssicherheit sowie der Realisierung eines erhöhten Trennungsabstands.In one embodiment of the invention, the Isolierstoffeinsatz guide sections, guide grooves or guide channels for receiving the disc-shaped varistors have, with the result of further ease of assembly and improved short circuit safety and the realization of an increased separation distance.

Alternativ oder in Ergänzung zum bereits erwähnten rahmenförmigen Isolierstoffeinsatz, der die Varistoren in einem Abstand zueinander fixiert, besteht die Möglichkeit, die notwendige Isolierung der Varistoren gegeneinander während des Herstellungsprozesses dadurch auszubilden, indem zunächst eine zähflüssige oder flüssige Isolierstoffkomponente, z.B. als Harz-Härter-Gemisch eingebracht wird. Die Varistorscheiben können dann eingesetzt werden und es ergibt sich eine definierte Lage der Varistoren zueinander nach Abschluss des Aushärtungsvorgangs. In diesem Sinne besteht die Möglichkeit, zunächst die vorerwähnte zähflüssige Harz-HärterKomponente, einen Rahmen bildend, in das Gehäuse einzuspritzen und bei einem nächsten Schritt die Varistoren in das Gehäuse einzusetzen und zu fixieren.Alternatively or in addition to the above-mentioned frame-shaped insulating insert which fixes the varistors at a distance from each other, it is possible to form the necessary isolation of the varistors against each other during the manufacturing process by first a viscous or liquid insulating material, eg as a resin-hardener mixture is introduced. The varistor disks can then be used and it results in a defined position of the varistors to each other after completion of the curing process. In this sense it is possible, first the aforementioned viscous resin hardener component, forming a frame to inject into the housing and insert the varistors in the housing at a next step and fix.

Die Erfindung soll nachstehend anhand eines Ausführungsbeispiels sowie unter Zuhilfenahme von Figuren näher erläutert werden.The invention will be explained below with reference to an embodiment and with the aid of figures.

Hierbei zeigen:

Fig. 1
Längsschnitt und Querschnitt durch eine beispielhafte Überspannungsschutzanordnung in Würfelform mit vier eingesetzten scheibenförmigen Varistoren;
Fig. 2
eine Abfolge der Montage der Überspannungsschutzanordnung, ausgehend von einem würfelförmigen Gehäuse als Vieleckkörper nebst Einsetzen eines Isolierkörpers, der als Isolierstoffeinsatz dient, und
Fig. 3
eine Detaildarstellung der überlappenden Ausbildung des Isolierstoffeinsatzes bzw. des Isolierkörpers im Eckbereich, wodurch ein Führungskanal gebildet ist.
Hereby show:
Fig. 1
Longitudinal section and cross section through an exemplary overvoltage protection arrangement in cube form with four inserted disc-shaped varistors;
Fig. 2
a sequence of mounting the overvoltage protection arrangement, starting from a cube-shaped housing as polygonal body together with inserting an insulating body, which serves as Isolierstoffeinsatz, and
Fig. 3
a detailed representation of the overlapping formation of the insulating insert or of the insulating body in the corner, whereby a guide channel is formed.

Die Fig. 1 (Längsschnitt linksseitig; Querschnitt rechtsseitig) zeigt einen würfelförmigen Vieleckkörper 1, der an seinen Gehäuseseiteninnenwandungsabschnitten Varistorscheiben 2 aufweist. Im Beispiel sind vier Varistorscheiben vorhanden, die jeweils die vier Gehäuseinnenseitenwände bedecken. Darüber hinaus ist ein Gewindebolzen 3 zum mechanischen Befestigen der Anordnung vorgesehen.The Fig. 1 (Longitudinal section on the left side, cross section on the right side) shows a cube-shaped polygonal body 1, which has varistor disks 2 at its housing side inner wall sections. In the example, there are four varistor disks, each covering the four inner side walls of the housing. In addition, a threaded bolt 3 is provided for mechanically securing the assembly.

Die Abfolge gemäß Fig. 2 geht zunächst von einem quadratischen Vieleckkörper aus, der aus einem leitfähigen Material, insbesondere Metall besteht.The sequence according to Fig. 2 starts first from a square polygon body, which consists of a conductive material, in particular metal.

Dieser Körper ist oben offen (Fig. 2, 1., rechtsseitig).This body is open at the top ( Fig. 2 . 1 ., right side).

Über diese offene Seite kann, wie in Fig. 2 unter Ziffer 2 erkennbar, ein Isolierkörper oder Isolierstoffeinsatz 4 eingebracht werden.About this open page can, as in Fig. 2 under number 2 recognizable, an insulating body or Isolierstoffeinsatz 4 are introduced.

Nach dem Einsetzen des Isolierkörpers 4 können dann die vier Metalloxidvaristoren in Scheibenbauform eingebracht werden.After insertion of the insulator 4 then the four metal oxide varistors can be introduced in disc form.

Im nächsten Schritt (Fig. 2, 4.) erfolgt ein Einbringen einer Innenelektrode und mechanische Verspannung der scheibenförmigen Metalloxidvaristoren 2.In the next step ( Fig. 2 4.), introduction of an internal electrode and mechanical clamping of the disc-shaped metal oxide varistors 2 takes place.

Der Kontaktkörper 5 ist in Kreuzform ausgebildet und steht mit einer bolzenartigen Innenelektrode 6 in Verbindung, die mit einem Gewinde 7 versehen ist, um ein elektrisches Anschlussmittel zu fixieren und/oder die Gesamtanordnung an einem Träger zu befestigen.The contact body 5 is formed in a cross shape and communicates with a bolt-like inner electrode 6, which is provided with a thread 7 in order to fix an electrical connection means and / or to fix the overall arrangement to a carrier.

Mit den Pfeildarstellungen gemäß Fig. 2, 4. wird die mechanische Verspannung und Kontaktierung der Varistorscheiben 2 zum Vieleckkörper 1 symbolisiert.With the arrow representations according to Fig. 2 4. the mechanical tension and contacting of the varistor disks 2 to the polygonal body 1 is symbolized.

Die Fig. 3 zeigt eine Detaildarstellung zweier scheibenförmiger Varistoren 2 mit einem Eckbereich des Isolierstoffeinsatzes 4 zum seitlichen Fixieren der Varistorscheiben 2 im Sinne eines Führungsabschnitts oder Führungskanals.The Fig. 3 shows a detailed representation of two disc-shaped varistors 2 with a corner region of the insulating insert 4 for laterally fixing the Varistorscheiben 2 in terms of a guide section or guide channel.

Der in den Fig. 1 und 2 gezeigte einseitige Gewindebefestigungs- oder -anschlussbolzen kann auch als Durchgangsbolzen ausgeführt werden, ohne den Grundgedanken der Erfindung zu verlassen.The in the Fig. 1 and 2 shown one-sided threaded fastener or connecting bolt can also be designed as a through-bolt, without departing from the spirit of the invention.

Claims (11)

Überspannungsschutzanordnung mit scheibenförmigem Varistor, welcher innerhalb eines, einen Hohlraum einschließenden Gehäuses angeordnet und elektrisch kontaktiert ist,
dadurch gekennzeichnet, dass
das Gehäuse als Vieleckkörper, insbesondere mehrseitiges Prisma, Würfel, Quader oder Tetraeder ausgebildet ist und mindestens eine Öffnung zum Einbringen mehrerer scheibenförmiger Varistoren aufweist, welche jeweils mit einem Abschnitt oder einem Teil der Gehäuseseiteninnenwandung in mechanischer Verbindung stehen und in Anlage kommen.Overvoltage protection arrangement with a disk-shaped varistor, which is arranged inside a cavity-enclosing housing and is electrically contacted,
characterized in that
the housing is designed as a polygonal body, in particular multi-sided prism, cube, cuboid or tetrahedron and has at least one opening for introducing a plurality of disc-shaped varistors, which are in mechanical connection with a portion or a part of the Gehäuseiteninneninnenung in mechanical connection and come into abutment. Überspannungsschutzanordnung nach Anspruch 1,
dadurch gekennzeichnet, dass
im Gehäuse ein Isolierstoffeinsatz befindlich ist, welcher die scheibenförmigen Varistoren in einem Abstand zueinander fixiert.Overvoltage protection arrangement according to Claim 1,
characterized in that
an insulating material insert is located in the housing, which fixes the disk-shaped varistors at a distance from each other. Überspannungsschutzanordnung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass
im nach dem Einsetzen der Varistoren verbleibenden Hohlraum des Gehäuses ein Kontaktierungskörper eingebracht ist, welcher mit den freien Seitenflächen der Varistorscheiben und dort befindlichen Kontaktelementen oder Kontaktflächen in Wirkverbindung gelangt.Overvoltage protection arrangement according to Claim 1 or 2,
characterized in that
in the remaining after insertion of the varistors cavity of the housing a contacting body is introduced, which comes into operative connection with the free side surfaces of the varistor disks and there contact elements or contact surfaces. Überspannungsschutzanordnung nach Anspruch 3,
dadurch gekennzeichnet, dass
mittels des Kontaktkörpers die Varistorscheiben mechanisch innerhalb des Gehäuses verspannt werden.Overvoltage protection arrangement according to Claim 3,
characterized in that
by means of the contact body, the varistor disks are clamped mechanically within the housing. Überspannungsschutzanordnung nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, dass
am oder im Gehäuse mindestens ein Gewindebolzen ausgebildet ist, welcher zur Befestigung der Anordnung und/oder der elektrischen Außenkontaktierung dient.Overvoltage protection arrangement according to one of the preceding claims,
characterized in that
at least one threaded bolt is formed on or in the housing, which serves for fastening the arrangement and / or the electrical external contact. Überspannungsschutzanordnung nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, dass
das Gehäuse aus einem elektrisch leitfähigen Material besteht.Overvoltage protection arrangement according to one of the preceding claims,
characterized in that
the housing consists of an electrically conductive material. Überspannungsschutzanordnung nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, dass
das Gehäuse als Wärmesenke ausgebildet ist.Overvoltage protection arrangement according to one of the preceding claims,
characterized in that
the housing is designed as a heat sink. Überspannungsschutzanordnung nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, dass
die Öffnung des Gehäuses mittels Deckel oder Kappe oder durch Verguss verschließbar ist.Overvoltage protection arrangement according to one of the preceding claims,
characterized in that
the opening of the housing by means of a lid or cap or by encapsulation is closed. Überspannungsschutzanordnung nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, dass
die scheibenförmigen Varistoren primär kraftschlüssig im Gehäuse befestigt sind.Overvoltage protection arrangement according to one of the preceding claims,
characterized in that
the disc-shaped varistors are fastened primarily non-positively in the housing. Überspannungsschutzanordnung nach Anspruch 2,
dadurch gekennzeichnet, dass
der, insbesondere rahmenförmige, Isolierstoffeinsatz Führungsabschnitte, Führungsnuten oder Führungskanäle zur Aufnahme der scheibenförmigen Varistoren besitzt.Overvoltage protection arrangement according to Claim 2,
characterized in that
the, in particular frame-shaped, Isolierstoffeinsatz guide sections, guide grooves or guide channels for receiving the disc-shaped varistors has. Überspannungsschutzanordnung nach Anspruch 2,
dadurch gekennzeichnet, dass
der Isolierstoffeinsatz durch eine im Ursprungszustand flüssige oder zähflüssige Masse gebildet ist, welche in das Gehäuse eingebracht wird und welche nach ihrem Aushärten die scheibenförmigen Varistoren fixiert.Overvoltage protection arrangement according to Claim 2,
characterized in that
the Isolierstoffeinsatz is formed by a liquid or viscous mass in the original state, which is introduced into the housing and which fixes the disc-shaped varistors after curing.
EP13193541.3A 2012-11-29 2013-11-19 Surge suppressor with disc-shaped varistors Not-in-force EP2738778B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012023335 2012-11-29
DE102013005327.7A DE102013005327A1 (en) 2012-11-29 2013-03-26 Overvoltage protection arrangement with disk-shaped varistor

Publications (2)

Publication Number Publication Date
EP2738778A1 true EP2738778A1 (en) 2014-06-04
EP2738778B1 EP2738778B1 (en) 2017-05-24

Family

ID=49622697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13193541.3A Not-in-force EP2738778B1 (en) 2012-11-29 2013-11-19 Surge suppressor with disc-shaped varistors

Country Status (3)

Country Link
EP (1) EP2738778B1 (en)
CN (1) CN203812665U (en)
DE (1) DE102013005327A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10629399B2 (en) 2016-06-10 2020-04-21 Dehn Se + Co Kg Overvoltage protection arrangement having a plurality of planar varistors arranged on a first side of an N-cornered supporting plate

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202016001937U1 (en) 2016-03-23 2016-07-11 DEHN + SÖHNE GmbH + Co. KG. Overvoltage protection arrangement with a plurality of disc-shaped varistors arranged on a first side of an n-sided carrier plate
DE202017000117U1 (en) 2016-06-22 2017-01-23 DEHN + SÖHNE GmbH + Co. KG. Overvoltage protection arrangement with at least one, arranged on a first side of a n-shaped support plate, disk-shaped varistor
DE202016107504U1 (en) 2016-06-22 2017-03-02 Dehn + Söhne Gmbh + Co. Kg Overvoltage protection arrangement with at least one, arranged on a first side of a n-shaped support plate, disk-shaped varistor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60112410T2 (en) 2000-03-07 2006-05-18 Raycap Corp. A VARISTOR DISK SHOCKABLE OVERVOLTAGE PROTECTION DEVICE
DE69932170T2 (en) 1998-09-21 2007-05-31 Raycap Corp. OVERVOLTAGE PROTECTION WITH A DISC FROM VARISTOR MATERIAL
DE102008048644A1 (en) * 2008-08-01 2010-02-04 Dehn + Söhne Gmbh + Co. Kg Overvoltage protection device with one or more parallel-connected, located in a structural unit overvoltage limiting elements
JP2010199515A (en) * 2009-02-27 2010-09-09 Otowa Denki Kogyo Kk Varistor device and method of manufacturing same
DE102010015814A1 (en) * 2010-04-20 2011-10-20 Phoenix Contact Gmbh & Co. Kg Snubber

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69932170T2 (en) 1998-09-21 2007-05-31 Raycap Corp. OVERVOLTAGE PROTECTION WITH A DISC FROM VARISTOR MATERIAL
DE60112410T2 (en) 2000-03-07 2006-05-18 Raycap Corp. A VARISTOR DISK SHOCKABLE OVERVOLTAGE PROTECTION DEVICE
DE102008048644A1 (en) * 2008-08-01 2010-02-04 Dehn + Söhne Gmbh + Co. Kg Overvoltage protection device with one or more parallel-connected, located in a structural unit overvoltage limiting elements
JP2010199515A (en) * 2009-02-27 2010-09-09 Otowa Denki Kogyo Kk Varistor device and method of manufacturing same
DE102010015814A1 (en) * 2010-04-20 2011-10-20 Phoenix Contact Gmbh & Co. Kg Snubber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10629399B2 (en) 2016-06-10 2020-04-21 Dehn Se + Co Kg Overvoltage protection arrangement having a plurality of planar varistors arranged on a first side of an N-cornered supporting plate

Also Published As

Publication number Publication date
CN203812665U (en) 2014-09-03
DE102013005327A1 (en) 2014-06-05
EP2738778B1 (en) 2017-05-24

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