EP0995244B1 - Surge voltage protector with an external short-circuiting device - Google Patents

Surge voltage protector with an external short-circuiting device Download PDF

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Publication number
EP0995244B1
EP0995244B1 EP98945012A EP98945012A EP0995244B1 EP 0995244 B1 EP0995244 B1 EP 0995244B1 EP 98945012 A EP98945012 A EP 98945012A EP 98945012 A EP98945012 A EP 98945012A EP 0995244 B1 EP0995244 B1 EP 0995244B1
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EP
European Patent Office
Prior art keywords
electrode
surge arrester
short
electrodes
area
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EP98945012A
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German (de)
French (fr)
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EP0995244A1 (en
Inventor
Jürgen Boy
Norbert Krost
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TDK Electronics AG
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Epcos AG
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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
    • H01T1/00—Details of spark gaps
    • H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure

Definitions

  • the invention is in the field of electrical components and is in the design of a surge arrester apply with an external short-circuit device is provided.
  • Such short-circuit devices are with both two-electrode and three-electrode surge arresters in use.
  • Such arresters usually have a cylindrical shape, the electrodes being arranged insulated from one another.
  • the short-circuit devices serve to protect the surge arrester with long-term loads; a short-circuit device usually contains one at higher temperatures fusible construction element, with the help of which the two Electrodes or the center electrode and one or both End electrodes are short-circuited.
  • each Arm of the spring clip is designed as a contact tab, that protrudes diagonally over the spacing plastic body and in the event of a short circuit, the end face of the respective End electrode contacted in the edge area (US 4,984,125 A, Fig. 1a and 1b).
  • Short-circuit devices known for Surge arrester with two electrodes as well as with three electrodes can be used. These short circuit devices also consist of a resilient bracket with two free ends that axially abut the end electrodes. At Surge arrester with two electrodes is between the a free end of the resilient shorting bar and the associated Electrode arranged a fusible insulating film, which in the event of a short circuit from the contact area of the free end of the Shorting bracket is pierced.
  • This contact area can consist of two flat contact tabs like a fork, provided the surge arrester with axially soldered connection wires is provided (FR 2 621 184 A).
  • the shorting bar contacts with three electrodes the center electrode and lies with its free Ends at the end faces of the two end electrodes axially below Interposition of an off-center in the edge area of the each electrode arranged insulating film (US 5,029,302 A, WO 90/13904).
  • a specially shaped injection molded part is provided, that is saddle-like on the arrester and on both ends with a stirrup-like approach, the foot area of each stirrup being the actual one Spacer for the springy contact tabs of the spring clip forms.
  • Each contact tab has two tongues, the two contact tongues having a common base area have, through a narrow slot from each other are separated, arranged on the eccentric to the respective end electrode Apply spacers and the spacer radially tower (US 5, 187,634 A).
  • the invention is based on the object a robust short-circuit device that is as simple as possible to create that also for surge arresters is suitable with axially welded connecting wires and a high AC load capacity (max. 30 Amp / 15 min per discharge path) having.
  • the invention provides that the contact tabs between them the middle area of the First electrode release that the spacer between the common base area of the contact tabs and the End face of the first electrode is arranged and that the common base area of the contact tabs with is provided in a slot in which the insulating spacer is fixed with a retaining attachment.
  • the holding approach can be designed as a short cylindrical nozzle or also be formed by an annular recess, which, for example, in the lateral surface of a cylindrical Body is incorporated.
  • Such a configuration of the short-circuit device enables - regardless of whether and how (radially or axially protruding) the connecting wires to the front electrodes are connected - a large-scale contact to the front electrodes by forming two contact tabs, those in the edge area of the electrodes without impairment contact through molten insulating material.
  • the one located relatively far from the contact points Spacers can be very small, especially be formed as a cylindrical body, whereby the local Fixing the spacer or spacers is structurally easier is.
  • the short-circuit device designed according to the invention is used for surge arresters with two electrodes, one of which the second electrode the other end of the surge arrester forms and from the first electrode a tubular insulator is kept at a distance, useful applied in such a way that the shorting bar in Axial direction of the surge arrester is symmetrical and is fixed on the insulator by means of a clip.
  • the other end of the shorting bar can also by means of a spacer at a distance from the second electrode being held; the other end of the shorting bar can but also lie directly on the second electrode.
  • the application of the shorting bar designed according to the invention for surge arresters with three electrodes, of which the second electrode is the other end of the surge arrester and the third electrode arranged between the first and the second electrode and of these electrodes by means of a first and a second hollow cylindrical insulator is isolated, is convenient in such a way that the shorting bar also in the axial direction is symmetrical and by means of a bracket sits on the third electrode.
  • the surge arrester 1 has a first end electrode 11, a second end electrode 12 and a third electrode 13, which is designed as a central electrode and of the two end electrodes 11 and 12 by means of the tubular insulators 14 and 15 are arranged insulated. All electrodes are made of copper and are similar to that in the configuration shown in U.S. Patent 4,433,354.
  • the two end electrodes 11 and 12 are axially welded on Provide connecting wires 16, in particular according to Figure 1 of U.S. Patent 4,362,962.
  • the center electrode 13 is with a tangentially welded and radial connecting wire Mistake.
  • the surge arrester 1 is with a short-circuit device 2 equipped, which essentially consist of a two-armed, resilient shorting bar 21 and two insulating spacers 31 exists.
  • the shorting bar 21 has two in parallel Arms running to the longitudinal axis of the surge arrester 22 and 23 on the area of the two end electrodes are angled perpendicular to the longitudinal axis A and then approximately parallel to the end faces of the two end electrodes 11 and 12 run.
  • the ends of the arms 22 and 23 form contact areas 24 and 25, which according to FIG. 2 each have two contact tabs 26 and 27 exist.
  • the contact tabs give that Center area 11 A of the respective end electrode free, wherein the actual contact area the edge region 11 B of the respective Electrode is opposite.
  • the contact tabs 26 and 27 have a common base 28, which is provided with a slot 29. In this slot 29 is a retaining lug 32 of the insulating spacer 31 used.
  • the insulating spacer is therefore located between the common base 28 and the edge region 11B the respective end electrode and is dimensioned so that between the contact tabs 26, 27 and the edge region 11 B of the end electrodes an air gap Ls is maintained.
  • the shorting bar 21 is also provided with a bracket 30, the isolators 14 and 15 on more than half of theirs Includes the scope and with the help of the shorting bar sits on the center electrode 13.
  • the surge arrester according to FIG. 3 is concerned around a two-electrode arrester with the two end electrodes 11 and 12, which are insulated from one another by means of the insulator 33 are.
  • the short-circuit device is according to the short-circuit device constructed and exists according to Figures 1 and 2 from a spring clip 34 and the two insulating spacers 31, the bracket 35 directly on the insulator 33 is placed without electrical contacting there to effect.
  • the surge arrester according to FIG 3 one insulating spacer 31 can also be omitted, so that the contact area of the resilient arm 23 always rests directly on the front edge area of the end electrode 11.
  • FIG. 5 shows the insulating spacer 31 with the holding attachment 32.
  • the insulating spacer can consist of a cylindrical part 36 which with a annular recess 37 is provided with which the spacer inserted into the slot 29 of the contact areas 24 and 25 can be.
  • the spacer can also tolerably consist of a disc 38, which then between the common base 28 of the tabs 26 and 27 and the edge region 11 B of the respective electrode is inserted and there is held by the spring tension of the arms 22, 23.

Description

Die Erfindung liegt auf dem Gebiet der elektrischen Bauelemente und ist bei der konstruktiven Ausgestaltung eines Überspannungsableiters anzuwenden, der mit einer äußeren Kurzschlußeinrichtung versehen ist. Derartige Kurzschlußeinrichtungen sind sowohl bei Zwei-Elektroden- als auch bei Drei-Elektroden-Überspannungsableitern gebräuchlich. Derartige Ableiter weisen üblicherweise eine zylindrische Bauform auf, wobei die Elektroden isoliert voneinander angeordnet sind. Die Kurzschlußeinrichtungen dienen zum Schutz des Überspannungsableiters bei Langzeitbelastungen; eine Kurzschlußeinrichtung enthält in aller Regel ein bei höheren Temperaturen schmelzbares Konstruktionselement, mit dessen Hilfe die beiden Elektroden bzw. die Mittelelektrode und eine oder beide Endelektroden kurzgeschlossen werden.The invention is in the field of electrical components and is in the design of a surge arrester apply with an external short-circuit device is provided. Such short-circuit devices are with both two-electrode and three-electrode surge arresters in use. Such arresters usually have a cylindrical shape, the electrodes being arranged insulated from one another. The short-circuit devices serve to protect the surge arrester with long-term loads; a short-circuit device usually contains one at higher temperatures fusible construction element, with the help of which the two Electrodes or the center electrode and one or both End electrodes are short-circuited.

Für Drei-Elektroden-Ableiter ist eine äußere Kurzschlußeinrichtung bekannt, die aus einem auf die Mittelelektrode mittels einer Klammer aufgesetzten, sich längs der Achse des Überspannungsableiters erstreckenden federnden Bügels besteht. Die freien Enden der beiden Arme dieses Federbügels liegen dabei nicht radial sondern stirnseitig axial an den beiden Endelektroden unter Zwischenschaltung eines im Überlastfall schmelzbaren, mittig zur jeweiligen Endelektrode angeordneten isolierenden Kunststoffkörpers an. Das Ende jedes Armes des Federbügels ist dabei als Kontaktlasche ausgebildet, die den abstandhaltenden Kunststoffkörper diagonal überragt und im Kurzschlußfall die Stirnfläche der jeweiligen Endelektrode in deren Randbereich kontaktiert (US 4,984,125 A, Fig. 1a und 1b). For three-electrode arresters there is an external short-circuit device known from a means of the center electrode put on a bracket, along the axis of the Surge arrester extending spring bracket exists. The free ends of the two arms of this spring clip are not radial but axially on the front two end electrodes with the interposition of one in the event of an overload fusible, arranged centrally to the respective end electrode insulating plastic body. The end of each Arm of the spring clip is designed as a contact tab, that protrudes diagonally over the spacing plastic body and in the event of a short circuit, the end face of the respective End electrode contacted in the edge area (US 4,984,125 A, Fig. 1a and 1b).

Es sind weiterhin Kurzschlußeinrichtungen bekannt, die für Überspannungsableiter sowohl mit zwei Elektroden als auch mit drei Elektroden einsetzbar sind. Diese Kurzschlußeinrichtungen bestehen ebenfalls aus einem federnden Bügel mit zwei freien Enden, die axial an den Endelektroden anliegen. Bei Überspannungsableitern mit zwei Elektroden ist zwischen dem einen freien Ende des federnden Kurzschlußbügels und der zugehörigen Elektrode eine schmelzbare Isolierfolie angeordnet, die im Kurzschlußfall vom Kontaktbereich des freien Endes des Kurzschlußbügels durchstoßen wird. Dieser Kontaktbereich kann dabei gabelartig aus zwei flachen Kontaktlaschen bestehen, sofern der Überspannungsableiter mit axial angelöteten Anschlußdrähten versehen ist (FR 2 621 184 A). Bei Überspannungsableitern mit drei Elektroden kontaktiert der Kurzschlußbügel die Mittelelektrode und liegt mit seinen freien Enden an den Stirnflächen der beiden Endelektroden axial unter Zwischenschaltung einer außermittig im Randbereich der jeweiligen Elektrode angeordneten Isolierfolie an (US 5,029,302 A, WO 90/13904).There are also short-circuit devices known for Surge arrester with two electrodes as well as with three electrodes can be used. These short circuit devices also consist of a resilient bracket with two free ends that axially abut the end electrodes. At Surge arrester with two electrodes is between the a free end of the resilient shorting bar and the associated Electrode arranged a fusible insulating film, which in the event of a short circuit from the contact area of the free end of the Shorting bracket is pierced. This contact area can consist of two flat contact tabs like a fork, provided the surge arrester with axially soldered connection wires is provided (FR 2 621 184 A). With surge arresters the shorting bar contacts with three electrodes the center electrode and lies with its free Ends at the end faces of the two end electrodes axially below Interposition of an off-center in the edge area of the each electrode arranged insulating film (US 5,029,302 A, WO 90/13904).

Bei einem weiterhin bekannten Drei-Elektroden-Überspannungsableiter mit federndem Kurzschlußbügel ist als isolierender Abstandhalter ein speziell geformtes Spritzgießteil vorgesehen, das sattelartig auf den Ableiter aufgesetzt ist und an beiden Enden mit einem steigbügelartigen Ansatz versehen ist, wobei der Fußbereich des jeweiligen Steigbügels den eigentlichen Abstandhalter für die federnden Kontaktlaschen des Federbügels bildet. Jede Kontaktlasche ist zweizüngig ausgebildet, wobei die beiden Kontaktzungen einen gemeinsamen Basisbereich aufweisen, durch einen schmalen Schlitz voneinander getrennt sind, am außermittig zur jeweiligen Endelektrode angeordneten Abstandhalter anliegen und den Abstandhalter radial überragen (US 5, 187,634 A). In a still known three-electrode surge arrester with a springy shorting bar is used as an insulating one Spacer a specially shaped injection molded part is provided, that is saddle-like on the arrester and on both ends with a stirrup-like approach, the foot area of each stirrup being the actual one Spacer for the springy contact tabs of the spring clip forms. Each contact tab has two tongues, the two contact tongues having a common base area have, through a narrow slot from each other are separated, arranged on the eccentric to the respective end electrode Apply spacers and the spacer radially tower (US 5, 187,634 A).

Ausgehend von einem Überspannungsableiter in zylindrischer Bauform mit den Merkmalen des Oberbegriffes des Patentanspruches 1 (US 5,187,634 A) liegt der Erfindung die Aufgabe zugrunde, eine möglichst einfach aufgebaute robuste Kurzschlußeinrichtung zu schaffen, die auch für Überspannungsableiter mit axial angeschweißten Anschlußdrähten geeignet ist und eine hohe Wechselstromtragfähigkeit (max. 30 Amp/15 min je Ableitstrecke) aufweist.Starting from a surge arrester in a cylindrical Design with the features of the preamble of the claim 1 (US 5,187,634 A), the invention is based on the object a robust short-circuit device that is as simple as possible to create that also for surge arresters is suitable with axially welded connecting wires and a high AC load capacity (max. 30 Amp / 15 min per discharge path) having.

Zur Lösung dieser Aufgabe ist gemäß der Erfindung vorgesehen, daß die Kontaktlaschen zwischen sich den Mittenbereich der ersten Elektrode freigeben, daß der Abstandhalter zwischen dem gemeinsamen Basisbereich der Kontaktlaschen und der Stirnfläche der ersten Elektrode angeordnet ist und daß der gemeinsame Basisbereich der Kontaktlaschen jeweils mit einem Schlitz versehen ist, in dem der isolierende Abstandhalter mit einem Halteansatz fixiert wird. Der Halteansatz kann dabei als kurzer zylindrischer Stutzen ausgebildet sein oder auch von einer ringförmigen Ausnehmung gebildet sein, die beispielsweise in die Mantelfläche eines zylindrischen Körpers eingearbeitet ist.To achieve this object, the invention provides that the contact tabs between them the middle area of the First electrode release that the spacer between the common base area of the contact tabs and the End face of the first electrode is arranged and that the common base area of the contact tabs with is provided in a slot in which the insulating spacer is fixed with a retaining attachment. The holding approach can be designed as a short cylindrical nozzle or also be formed by an annular recess, which, for example, in the lateral surface of a cylindrical Body is incorporated.

Eine derartige Ausgestaltung der Kurzschlußeinrichtung ermöglicht - unabhängig davon, ob und wie (radial oder axial abstehend) die Anschlußdrähte an die stirnseitigen Elektroden angeschlossen sind - eine großflächige Kontaktgabe an den stirnseitigen Elektroden durch Ausformung von zwei Kontaktlaschen, die im Randbereich der Elektroden ohne Beeinträchtigung durch geschmolzenes Isoliermaterial zur Kontaktgabe gelangen. Der relativ weit von den Kontaktstellen entfernt angeordnete Abstandhalter kann dabei sehr klein, insbesondere als zylindrischer Körper, ausgebildet sein, wodurch die örtliche Fixierung des bzw. der Abstandhalter konstruktiv erleichtert ist. Such a configuration of the short-circuit device enables - regardless of whether and how (radially or axially protruding) the connecting wires to the front electrodes are connected - a large-scale contact to the front electrodes by forming two contact tabs, those in the edge area of the electrodes without impairment contact through molten insulating material. The one located relatively far from the contact points Spacers can be very small, especially be formed as a cylindrical body, whereby the local Fixing the spacer or spacers is structurally easier is.

Die gemäß der Erfindung ausgebildete Kurzschlußeinrichtung wird für Überspannungsableiter mit zwei Elektroden, von denen die zweite Elektrode das andere stirnseitige Ende des Überspannungsableiters bildet und von der ersten Elektrode durch einen rohrförmigen Isolator auf Abstand gehalten wird, zweckmäßig in der Weise angewendet, daß der Kurzschlußbügel in Achsrichtung des Überspannungsableiters symmetrisch ausgebildet und mittels einer Klammer auf dem Isolator fixiert ist. Dabei kann das andere Ende des Kurzschlußbügels ebenfalls mittels eines Abstandhalters auf Abstand zur zweiten Elektrode gehalten werden; das andere Ende des Kurzschlußbügels kann aber auch direkt an der zweiten Elektrode anliegen.The short-circuit device designed according to the invention is used for surge arresters with two electrodes, one of which the second electrode the other end of the surge arrester forms and from the first electrode a tubular insulator is kept at a distance, useful applied in such a way that the shorting bar in Axial direction of the surge arrester is symmetrical and is fixed on the insulator by means of a clip. The other end of the shorting bar can also by means of a spacer at a distance from the second electrode being held; the other end of the shorting bar can but also lie directly on the second electrode.

Die Anwendung des gemäß der Erfindung ausgebildeten Kurzschlußbügels bei Überspannungsableitern mit drei Elektroden, von denen die zweite Elektrode das andere stirnseitige Ende des Überspannungsableiters bildet und die dritte Elektrode zwischen der ersten und der zweiten Elektrode angeordnet und von diesen Elektroden mittels eines ersten und eines zweiten hohlzylindrischen Isolators isoliert ist, erfolgt zweckmäßig in der Weise, daß der Kurzschlußbügel in Achsrichtung ebenfalls symmetrisch ausgebildet ist und mittels einer Klammer auf der dritten Elektrode aufsitzt.The application of the shorting bar designed according to the invention for surge arresters with three electrodes, of which the second electrode is the other end of the surge arrester and the third electrode arranged between the first and the second electrode and of these electrodes by means of a first and a second hollow cylindrical insulator is isolated, is convenient in such a way that the shorting bar also in the axial direction is symmetrical and by means of a bracket sits on the third electrode.

Drei Ausführungsbeispiele eines gemäß der Erfindung ausgebildeten Überspannungsableiters sind in den Figuren 1 bis 7 dargestellt. Dabei zeigen

Figuren 1 und 2
einen Drei-Elektroden-Überspannungsableiter in zwei Ansichten,
Figur 3
einen Zwei-Elektroden-Ableiter in Seitenansicht,
Figur 4
eine Variante zum Überspannungsableiter gemäß Figur 3 und
Figuren 5 bis 7
drei Ausführungsformen eines isolierenden Abstandhalters.
Three exemplary embodiments of a surge arrester designed according to the invention are shown in FIGS. 1 to 7. Show
Figures 1 and 2
a three-electrode surge arrester in two views,
Figure 3
a two-electrode arrester in side view,
Figure 4
a variant of the surge arrester according to Figure 3 and
Figures 5 to 7
three embodiments of an insulating spacer.

Der Überspannungsableiter 1 gemäß den Figuren 1 und 2 weist eine erste Endelektrode 11, eine zweite Endelektrode 12 und eine dritte Elektrode 13 auf, die als Mittelelektrode ausgebildet und von den beiden Endelektroden 11 und 12 mittels der rohrförmigen Isolatoren 14 und 15 isoliert angeordnet ist. Alle Elektroden bestehen aus Kupfer und sind ähnlich der in der US-PS 4,433,354 dargestellten Konfiguration ausgebildet. Dabei sind die beiden Endelektroden 11 und 12 mit axial angeschweißten Anschlußdrähten 16 versehen, insbesondere gemäß Figur 1 der US-PS 4,362,962. Die Mittelelektrode 13 ist mit einem tangential angeschweißten und radial verlaufenden Anschlußdraht versehen.The surge arrester 1 according to FIGS. 1 and 2 has a first end electrode 11, a second end electrode 12 and a third electrode 13, which is designed as a central electrode and of the two end electrodes 11 and 12 by means of the tubular insulators 14 and 15 are arranged insulated. All electrodes are made of copper and are similar to that in the configuration shown in U.S. Patent 4,433,354. The two end electrodes 11 and 12 are axially welded on Provide connecting wires 16, in particular according to Figure 1 of U.S. Patent 4,362,962. The center electrode 13 is with a tangentially welded and radial connecting wire Mistake.

Der Überspannungsableiter 1 ist mit einer Kurzschlußeinrichtung 2 bestückt, die im wesentlichen aus einem zweiarmigen, federnden Kurzschlußbugel 21 und zwei isolierenden Abstandhaltern 31 besteht. Der Kurzschlußbügel 21 weist zwei parallel zur Längsachse des Überspannungsableiters verlaufende Arme 22 und 23 auf, die im Bereich der beiden Endelektroden senkrecht zur Längsachse A abgewinkelt sind und anschließend etwa parallel zu den Stirnflächen der beiden Endelektroden 11 und 12 verlaufen. Die Enden der Arme 22 und 23 bilden Kontaktbereiche 24 und 25, die gemäß Figur 2 aus je zwei Kontaktlaschen 26 und 27 bestehen. Die Kontaktlaschen geben den Mittenbereich 11 A der jeweiligen Endelektrode frei, wobei die eigentliche Kontaktfläche dem Randbereich 11 B der jeweiligen Elektrode gegenüber steht.The surge arrester 1 is with a short-circuit device 2 equipped, which essentially consist of a two-armed, resilient shorting bar 21 and two insulating spacers 31 exists. The shorting bar 21 has two in parallel Arms running to the longitudinal axis of the surge arrester 22 and 23 on the area of the two end electrodes are angled perpendicular to the longitudinal axis A and then approximately parallel to the end faces of the two end electrodes 11 and 12 run. The ends of the arms 22 and 23 form contact areas 24 and 25, which according to FIG. 2 each have two contact tabs 26 and 27 exist. The contact tabs give that Center area 11 A of the respective end electrode free, wherein the actual contact area the edge region 11 B of the respective Electrode is opposite.

Die Kontaktlaschen 26 und 27 haben eine gemeinsame Basis 28, die mit einem Schlitz 29 versehen ist. In diesen Schlitz 29 ist ein Halteansatz 32 des isolierenden Abstandhalters 31 eingesetzt. Der isolierende Abstandhalter befindet sich somit zwischen der gemeinsamen Basis 28 und dem Randbereich 11 B der jeweiligen Endelektrode und ist so bemessen, daß zwischen den Kontaktlaschen 26,27 und dem Randbereich 11 B der Endelektroden ein Luftspalt Ls eingehalten wird.The contact tabs 26 and 27 have a common base 28, which is provided with a slot 29. In this slot 29 is a retaining lug 32 of the insulating spacer 31 used. The insulating spacer is therefore located between the common base 28 and the edge region 11B the respective end electrode and is dimensioned so that between the contact tabs 26, 27 and the edge region 11 B of the end electrodes an air gap Ls is maintained.

Der Kurzschlußbügel 21 ist noch mit einer Klammer 30 versehen, die die Isolatoren 14 und 15 auf mehr als der Hälfte ihres Umfanges umfaßt und mit deren Hilfe der Kurzschlußbügel auf der Mittelelektrode 13 aufsitzt.The shorting bar 21 is also provided with a bracket 30, the isolators 14 and 15 on more than half of theirs Includes the scope and with the help of the shorting bar sits on the center electrode 13.

Bei dem Überspannungsableiter gemäß Figur 3 handelt es sich um einen Zwei-Elektroden-Ableiter mit den beiden Endelektroden 11 und 12, die mittels des Isolators 33 voneinander isoliert sind. Die Kurzschlußeinrichtung ist gemäß der Kurzschlußeinrichtung gemäß den Figuren 1 und 2 aufgebaut und besteht aus einem Federbügel 34 und den beiden isolierenden Abstandhaltern 31, wobei die Klammer 35 direkt auf den Isolator 33 aufgesetzt ist, ohne dort eine elektrische Kontaktierung zu bewirken.The surge arrester according to FIG. 3 is concerned around a two-electrode arrester with the two end electrodes 11 and 12, which are insulated from one another by means of the insulator 33 are. The short-circuit device is according to the short-circuit device constructed and exists according to Figures 1 and 2 from a spring clip 34 and the two insulating spacers 31, the bracket 35 directly on the insulator 33 is placed without electrical contacting there to effect.

Gemäß Figur 4 kann bei dem Überspannungsableiter gemäß Figur 3 der eine isolierende Abstandhalter 31 auch weggelassen werden, so daß der Kontaktbereich des federnden Armes 23 stets direkt am stirnseitigen Randbereich der Endelektrode 11 anliegt.According to FIG. 4, the surge arrester according to FIG 3 one insulating spacer 31 can also be omitted, so that the contact area of the resilient arm 23 always rests directly on the front edge area of the end electrode 11.

Figur 5 zeigt den isolierenden Abstandhalter 31 mit dem Halteansatz 32. - Gemäß Figur 6 kann der isolierende Abstandhalter aus einem zylindrischen Teil 36 bestehen, das mit einer ringförmigen Ausnehmung 37 versehen ist, mit der der Abstandhalter in den Schlitz 29 der Kontaktbereiche 24 und 25 eingefügt werden kann. - Gemäß Figur 7 kann der Abstandhalter auch leidglich aus einer Scheibe 38 bestehen, die dann zwischen die gemeinsame Basis 28 der Laschen 26 und 27 und dem Randbereich 11 B der jeweiligen Elektrode eingefügt wird und dort durch die Federspannung der Arme 22, 23 festgehalten wird.FIG. 5 shows the insulating spacer 31 with the holding attachment 32. According to FIG. 6, the insulating spacer can consist of a cylindrical part 36 which with a annular recess 37 is provided with which the spacer inserted into the slot 29 of the contact areas 24 and 25 can be. - According to Figure 7, the spacer can also tolerably consist of a disc 38, which then between the common base 28 of the tabs 26 and 27 and the edge region 11 B of the respective electrode is inserted and there is held by the spring tension of the arms 22, 23.

Claims (5)

  1. Surge arrester having a cylindrical shape with at least one first electrode which forms an end-face end of the surge arrester and with a second electrode, which is arranged such that it is insulated from the first electrode, and with a sprung short-circuiting clip whose one end has a contact area which is associated with an edge area of the end surface of the first electrode,
    with the contact area of the short-circuiting clip being held axially at a distance away from the first electrode by means of a spacer which is arranged eccentrically with respect to the first electrode, provides insulation and can melt in the event of an overload, and the contact area (24, 25), which is held at a distance (Ls), of the sprung short-circuiting clip (21) being formed by two contact lugs (26, 27) which originate from a common base area,
    characterized
    in that the contact lugs (26, 27) expose the centre area (11 A) of the first electrode (11) between them,
    in that the insulating spacer (31) is arranged between the common base area (28) of the contact lugs (26, 27) and the end surface of the first electrode (11), and
    in that the common base area (28) of the contact lugs is provided with a slot (29) in which the insulating spacer (31) is fixed by means of a holding attachment (32).
  2. Surge arrester according to Claim 1,
    characterized
    in that the holding attachment is formed by an annular recess (37).
  3. Surge arrester according to Claim 1 or 2 having two electrodes, of which the second electrode forms the other end-face end of the surge arrester, and having a tubular insulator which is arranged between the two electrodes,
    characterized
    in that the short-circuiting clip is designed to be symmetrical in the axial direction of the surge arrester, and is fixed on the insulator (33) by means of a bracket (35).
  4. Surge arrester according to Claim 3,
    characterized
    in that the other end of the short-circuiting clip rests directly on the second electrode (12).
  5. Surge arrester according to Claim 1 or 2 having three electrodes, of which the second electrode forms the other end-face end of the surge arrester, and the third electrode is arranged between the first electrode and the second electrode and is insulated from these electrodes by means of a first and a second hollowcylindrical insulator,
    characterized
    in that the short-circuiting clip (21) is designed to be symmetrical in the axial direction, and is seated on the third electrode (13) by means of a bracket (30).
EP98945012A 1997-07-15 1998-07-14 Surge voltage protector with an external short-circuiting device Expired - Lifetime EP0995244B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19731312A DE19731312A1 (en) 1997-07-15 1997-07-15 Surge arrester with external short-circuit device
DE19731312 1997-07-15
PCT/DE1998/002011 WO1999004468A1 (en) 1997-07-15 1998-07-14 Surge voltage protector with an external short-circuiting device

Publications (2)

Publication Number Publication Date
EP0995244A1 EP0995244A1 (en) 2000-04-26
EP0995244B1 true EP0995244B1 (en) 2001-05-30

Family

ID=7836429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98945012A Expired - Lifetime EP0995244B1 (en) 1997-07-15 1998-07-14 Surge voltage protector with an external short-circuiting device

Country Status (5)

Country Link
US (1) US6424514B1 (en)
EP (1) EP0995244B1 (en)
CN (1) CN1264502A (en)
DE (2) DE19731312A1 (en)
WO (1) WO1999004468A1 (en)

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US7342770B2 (en) * 2003-07-09 2008-03-11 Maxwell Technologies, Inc. Recyclable dry particle based adhesive electrode and methods of making same
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US7203056B2 (en) * 2003-11-07 2007-04-10 Maxwell Technologies, Inc. Thermal interconnection for capacitor systems
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Also Published As

Publication number Publication date
US6424514B1 (en) 2002-07-23
WO1999004468A1 (en) 1999-01-28
EP0995244A1 (en) 2000-04-26
CN1264502A (en) 2000-08-23
DE59800801D1 (en) 2001-07-05
DE19731312A1 (en) 1999-01-28

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