EP2050105B1 - Disconnector for a surge arrester particularly for a pluggable surge arrester - Google Patents

Disconnector for a surge arrester particularly for a pluggable surge arrester Download PDF

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Publication number
EP2050105B1
EP2050105B1 EP07730033A EP07730033A EP2050105B1 EP 2050105 B1 EP2050105 B1 EP 2050105B1 EP 07730033 A EP07730033 A EP 07730033A EP 07730033 A EP07730033 A EP 07730033A EP 2050105 B1 EP2050105 B1 EP 2050105B1
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EP
European Patent Office
Prior art keywords
formed part
arrester
disconnector according
connection
solder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP07730033A
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German (de)
French (fr)
Other versions
EP2050105A1 (en
Inventor
Edmund ZÄUNER
Richard Daum
Georg Wittmann
Florian Gaeck
Sascha Ludewig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dehn SE and Co KG
Original Assignee
Dehn and Soehne GmbH and Co KG
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Publication date
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Publication of EP2050105A1 publication Critical patent/EP2050105A1/en
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Publication of EP2050105B1 publication Critical patent/EP2050105B1/en
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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H01H2037/762—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts

Definitions

  • the invention relates to a separating device for in particular pluggable surge arrester, wherein the separation point is designed as a thermally triggered solder connection between an outer terminal of the arrester and a connection point of the at least one arrester element, for example a varistor disc and wherein further acts on the solder connection a biasing force in the separation direction, according to the preamble of claim 1
  • Surge arresters with separation points which are designed as thermally influenced solder joint belong, for example, according to the DE 295 19 313 U1 and the DE 9305796 U1 to the state of the art.
  • the heat source of which is preferably a surge protection device to be monitored, e.g. forms a varistor
  • the solder is liquefied and separated as a result of thereby triggered switching movement of a specially provided part of the separating device, an electrical connection.
  • the part of the separating device, which performs the switching movement, is biased in the prior art by means of a spring-biased in the switching direction.
  • the switching movement reaches its absolute end point as soon as the preload force of the spring is used up.
  • the EP 0 716 493 A1 discloses a parallel connection of a plurality of varistors each having a disconnecting device, wherein the state of each of the varistors can be displayed by means of a display device.
  • a plurality of solder joints are to be separated as simultaneously as possible in order to cancel the electrical connection.
  • multiple solder joints require a larger amount of solder material with the result that the heat energy has a greater value to reach the melting point of this larger amount of material.
  • a delayed response of the separating device is possible.
  • the separation point is designed as thermally triggered solder connection between an outer terminal contact of the arrester and a connection point of the at least one arrester element, such as a varistor disc and wherein a secure, rapid disconnection can be realized and wherein furthermore an increased thermal sensitivity for safe release of the arrester in case of failure or overload is given.
  • the object of the invention is achieved by a separation device for in particular pluggable surge arrester according to the feature combination according to claim 1, wherein the dependent claims represent at least expedient refinements and developments.
  • the separating device according to the invention can also be used for the parallel connection of several arresters, i.
  • Protective elements are listed as a common separating device, which is arranged virtually in the force-free space between the arresters.
  • the separating device can be loaded with very high surge currents and the close contact with the arresters results in the desired sensitive response.
  • the outer terminal contact of the particular pluggable surge arrester is designed as a metallic molded part, which has an integral extension leg.
  • This extension leg has a solder connection, i. to the separation point leading end, which has a U-shape.
  • connection point of the arrester element e.g. a varistor disk
  • the connection point of the arrester element is formed as a surface piece which, standing in abutment with a portion of the U-shaped end of the molding, is secured thereto by the solder.
  • the metallic molded part is under inherent spring bias, the biasing direction coinciding with the separating movement.
  • the width and the length of the finger is designed so that there is a blade-like dragging and pushing away the molten solder in Abtrennfall. Unwanted solder scratches or solder bridges are avoided by this constructive solution.
  • the solder connection can be made as a pin or rivet of a melting material, wherein the pin and the rivet penetrates both a recess in the surface piece and in the U-shaped end of the molding.
  • a cotter pin made of a melting material i. acts as a connecting solder.
  • a plurality of spaced pins or rivets can be made of a melting material, if this proves to be necessary taking into account the surge currents to be led.
  • the respective surface piece of the arrester element runs parallel to the respective leg of the U-shaped end of the molded part and abuts against it.
  • the finger acts on the connecting portion between the U-shaped leg of the molded part and pulls this section by spring force in the separating direction, wherein the spring biasing force of the molded part vectorially adds that spring force realized on the finger, for example by a helical compression spring , acts.
  • solder joint is the only solder joint, in particular in the form of a solder pill, i. it does not require multiple solder joints, as is necessary in the prior art.
  • the finger may be in communication with an optical display to represent the functional state of the trap.
  • This optical display can comprise a sliding element with a correspondingly colored design, which moves in front of a window or is removed from a window area.
  • two disc-shaped arrester elements are arranged parallel and spaced from each other, wherein the respective surface pieces on opposite sides facing each other such that a U-leg of the molding with a first surface piece and the other U-legs with a second surface piece to the plant comes, wherein the separation direction and the separation movement in the distance space of the arrester elements are given in or run.
  • the metallic molded part may have a V-shaped plug contact bend at its end pointing away from the soldered connection.
  • the sheet may include an angling, e.g. Stirred at an angle of 90 °, having the connecting portion between the legs of the U-shaped end of the molding outside, i. at least partially surrounds at a side facing away from the separation direction. Also in this constructive variant, the distance of the mechanical contact between surface piece and molded part is secured at least over a portion by a solder material.
  • extension leg of the metallic molded part may have at least one one-sided or even a two-sided fold. This fold can be performed up to the U-shaped end of the molding or pass over an extension of the Abkantungsschenkel in the U-shaped end.
  • the separating device and the connection of the surge arrester is made of a single part, preferably consisting of a metallic, resilient material, which is bent into a U-shape and soldered to the respective surface piece or several surface pieces in the parallel connection of arresters , It thus supports the spring action of the material of the molded part, the desired separation movement in particular, even if a plurality of parallel-connected arresters uneven heating of Lotverhindung occurs.
  • Fig. 1 a perspective view of a module for a pluggable surge arrester with disconnecting device and removed outer housing
  • FIG. 2 an analogous representation of those after Fig. 1 but in side view;
  • Fig. 3 a representation of the surge arrester according to those after Fig. 2 but with the support plate removed;
  • FIG. 4 and 5 Representations of the surge arrester in the separated state
  • FIG. 6 and 7 Top view and perspective view of a first embodiment of the embodiment of the separation device in the use of two parallel disc-shaped conductors, in particular varistors;
  • Fig. 8 a second embodiment of the separating device with a rivet or a pin made of a melting material
  • Fig. 9 a representation of the single solder joint executed as Lotpille
  • Fig. 10 a third embodiment of the separating device, wherein the surface pieces of the arrester have an angled portion and engage around the metallic molded part on the outside;
  • Fig. 11 a representation of an embodiment similar to that after Fig. 9 but with only one varistor;
  • Fig. 12 a representation of those similar Fig. 8 , but only with one arrester and
  • Fig. 13 an illustration of the separation device according to Fig. 11 with finger and optical display for signaling the functional state of the separating device or of the arrester used.
  • a disconnecting device for in particular pluggable surge arresters which as a plug-in module 1, comprising one or more arresters, e.g. in the form of varistors, can be performed.
  • FIG. 1 plug-in module 1 shown has a mechanical support member 2, which for attachment and for receiving Varistorizationn 3 (see Fig. 6 ) serves.
  • a support plate 4 serves inter alia to receive a display device 5, e.g. can be realized as a slide.
  • a colored field which is present on the support plate 4, based on a window contained in the outer housing (not shown) can be opened or closed.
  • the plug-in module 1 also has external connection contacts 6, which serve for electrical contacting in conjunction with a mating contact piece of a base part (not shown).
  • terminal contact 6 (in Fig. 1 recognizable in the right part of the picture) is formed as a metallic molded part, which has an integral extension leg 7. Under this integral embodiment, it is understood that the relevant terminal contact with the extension arm 7 is made in one piece.
  • solder joint 8 (see Fig. 9 ) facing end of the extension leg 7 has a U-shape. 9
  • connection point of the arrester element e.g. a varistor disk 3 is formed as a surface piece 10, which, standing in abutment with a portion of the U-shaped end 9 of the molding is secured with this by the solder joint 8.
  • the metallic molding i. the extension leg 7 is under a natural spring bias.
  • a spring-loaded finger 11 mounted in a guide is engaged to cause rapid and safe electrical disconnection of the solder joint 8 by both assisting the separation movement of the molding and displacing it to effect the soldering material.
  • Fig. 3 Based on Fig. 3 is shown as the finger 11 is movably mounted on a guide member 12, wherein the guide member 12 receives a helical compression spring 13.
  • the helical compression spring 13 ensures that the finger 11 is biased in the image direction to the left. This biasing direction thus has the same vector as that which is characterized by the inherent spring force of the extension leg 7.
  • the Fig. 3 also makes it clear that the separating device according to the invention can also be combined with a further thermally triggerable display 14 in order to signal, for example, the reaching of a first limit temperature which does not yet lead to a relevant impairment of the solder connection 8.
  • FIG. 3 represents the state of the in-service connection between terminal contact 6 and surface piece 10, with the Fig. 4 and 5 the disconnected state made clear, and it can also be seen that the display device 5 has moved in the image to the left.
  • the force of the helical compression spring 13 acts on the finger 11 and thus on the melting solder of the solder connection 8.
  • the spring preload of the metallic molding also generates a force in the separation direction (arrow).
  • FIG. 6 shows two spaced Varistorin each with a patch 10 for electrical connection.
  • the U-shaped end 9 of the metallic molded part comes with its outer sides of the U-legs with an outer side of the respective surface piece 10 in contact (see also perspective view Fig. 7 ).
  • a pin or rivet 16 may be fixed from a melting material which secures the point of separation until the melting point of the rivet or stud material is reached.
  • Fig. 9 can also be a solder joint 8 can be realized as Lotpille.
  • a solder joint 8 can be realized as Lotpille.
  • a combination rivet / pin 16 and 8 solder joint as Lotpille feasible.
  • the extension leg 7 has a shape, after which two bends are oriented in the direction of the space, which is formed by the two spaced Varistorin 3.
  • the patches 10 each have a fold 17, which the extension leg 7 on the outside, i. surround away from the separation direction.
  • a solder joint secures the position of the extension leg 7 with respect to the position of the patches 10 provided with a fold 17.
  • FIG. 11 and 12 show a variant of the separating device in each case partially completed, but still without display device 5 and the guided finger 11.
  • the latter elements are shown in the illustration Fig. 13 recognizable.
  • the metallic molded part with the extension leg 7 preferably has stability-increasing contours 18, which can be executed as beading or bending.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Thermistors And Varistors (AREA)
  • Fuses (AREA)

Description

Die Erfindung betrifft eine Abtrennvorrichtung für insbesondere steckbare Überspannungsableiter, wobei die Abtrennstelle als thermisch auslösbare Lotverbindung zwischen einem äußeren Anschlusskontakt des Ableiters und einem Anschlusspunkt des mindestens einen Ableiterelements, beispielsweise einer Varistorscheibe ausgeführt ist und wobei weiterhin auf die Lotverbindung eine Vorspannkraft in Trennrichtung einwirkt, gemäß Oberbegriff des Patentanspruchs 1.The invention relates to a separating device for in particular pluggable surge arrester, wherein the separation point is designed as a thermally triggered solder connection between an outer terminal of the arrester and a connection point of the at least one arrester element, for example a varistor disc and wherein further acts on the solder connection a biasing force in the separation direction, according to the preamble of claim 1

Überspannungsableiter mit Abtrennstellen, die als thermisch beeinflussbare Lotverbindung ausgebildet sind, gehören beispielsweise nach der DE 295 19 313 U1 und der DE 9305796 U1 zum Stand der Technik.Surge arresters with separation points, which are designed as thermally influenced solder joint belong, for example, according to the DE 295 19 313 U1 and the DE 9305796 U1 to the state of the art.

Unter dem Einfluss einer Erwärmung, deren Wärmequelle vorzugsweise ein zu überwachendes Überspannungsschutzbauteil, z.B. einen Varistor bildet, wird das Lot verflüssigt und infolge einer dadurch ausgelösten Schaltbewegung eines speziell vorgesehenen Teils der Abtrennvorrichtung eine elektrische Verbindung aufgetrennt.Under the influence of heating, the heat source of which is preferably a surge protection device to be monitored, e.g. forms a varistor, the solder is liquefied and separated as a result of thereby triggered switching movement of a specially provided part of the separating device, an electrical connection.

Das Teil der Abtrennvorrichtung, welches die Schaltbewegung ausführt, ist nach dem Stand der Technik mittels einer in Schaltrichtung ausgerichteten Federkraft vorgespannt. Die Schaltbewegung erreicht ihren absoluten Endpunkt, sobald die Vorspannkraft der Feder aufgebraucht ist.The part of the separating device, which performs the switching movement, is biased in the prior art by means of a spring-biased in the switching direction. The switching movement reaches its absolute end point as soon as the preload force of the spring is used up.

Die EP 0 716 493 A1 offenbart eine Parallelschaltung von mehreren Varistoren mit je einer Abtrennvorrichtung, wobei der Zustand jedes der Varistoren mit Hilfe einer Anzeigevorrichtung darstellbar ist. Bei dieser Lösung des Standes der Technik sind mehrere Lötverbindungen möglichst gleichzeitig zu trennen, um die elektrische Verbindung aufzuheben. Mehrere Lötverbindungen erfordern naturgemäß eine größere Menge Lotmaterials mit der Folge, dass die Wärmeenergie zum Erreichen des Schmelzpunkts dieser größeren Materialmenge einen größeren Wert besitzt. Hierdurch ist ein verzögertes Ansprechen der Abtrennvorrichtung möglich.The EP 0 716 493 A1 discloses a parallel connection of a plurality of varistors each having a disconnecting device, wherein the state of each of the varistors can be displayed by means of a display device. In this solution of the prior art, a plurality of solder joints are to be separated as simultaneously as possible in order to cancel the electrical connection. Of course, multiple solder joints require a larger amount of solder material with the result that the heat energy has a greater value to reach the melting point of this larger amount of material. As a result, a delayed response of the separating device is possible.

Gemäß der DE 40 42 237 A1 ist es ebenso bekannt, ein Paket aus parallel geschalteten Varistoren vorzusehen, die über Kupferlitzen mit den jeweiligen Anschlüssen in Verbindung stehen. Die Kupferlitzen werden unter Federvorspannung gehalten und weisen Lötverbindungen auf, so dass auch bei diesem Stand der Technik eine Abtrennvorrichtung gegeben ist. Die Verwendung von Kupferlitzen ist jedoch insofern von Nachteil, als dass durch die Stromkraftwirkungen ein Aufspleißen der Litze eintritt mit der Folge, dass die Überspannungsschutzeinrichtung ausfallen kann.According to the DE 40 42 237 A1 It is also known to provide a package of varistors connected in parallel, which communicate with the respective terminals via copper strands. The copper strands are held under spring tension and have solder joints, so that even in this prior art, a separation device is given. However, the use of copper strands is disadvantageous in that by the Stromkraftwirkungen a splicing of the strand occurs with the result that the overvoltage protection device can fail.

Aus dem Vorgenannten ist es daher Aufgabe der Erfindung, eine weiterentwickelte Abtrennvorrichtung für insbesondere steckbare Überspannungsableiter anzugeben, wobei die Abtrennstelle als thermisch auslösbare Lotverbindung zwischen einem äußeren Anschlusskontakt des Ableiters und einem Anschlusspunkt des mindestens einen Ableiterelements, beispielsweise einer Varistorscheibe ausgeführt ist und wobei ein sicheres, schnelles Abtrennen realisiert werden kann und wobei weiterhin eine erhöhte thermische Sensibilität für ein sicheres Auslösen der Ableiter im Störungs-oder Überlastfall gegeben ist.From the foregoing, it is therefore an object of the invention to provide an advanced separation device for in particular pluggable surge, the separation point is designed as thermally triggered solder connection between an outer terminal contact of the arrester and a connection point of the at least one arrester element, such as a varistor disc and wherein a secure, rapid disconnection can be realized and wherein furthermore an increased thermal sensitivity for safe release of the arrester in case of failure or overload is given.

Die Lösung der Aufgabe der Erfindung erfolgt durch eine Abtrennvorrichtung für insbesondere steckbare Überspannungsableiter gemäß der Merkmalskombination nach Patentanspruch 1, wobei die Unteransprüche mindestens zweckmäßige Ausgestaltungen und Weiterbildungen darstellen.The object of the invention is achieved by a separation device for in particular pluggable surge arrester according to the feature combination according to claim 1, wherein the dependent claims represent at least expedient refinements and developments.

Die erfindungsgemäße Abtrennvorrichtung kann auch für die Parallelschaltung von mehreren Ableitern, d.h. Schutzelementen als gemeinsame Abtrennvorrichtung aufgeführt werden, die quasi im kraftfreien Raum zwischen den Ableitern angeordnet ist. Hierdurch kann die Abtrennvorrichtung mit sehr hohen Stoßströmen belastet werden und durch den engen Kontakt zu den Ableitern ergibt sich das gewünschte sensible Ansprechverhalten.The separating device according to the invention can also be used for the parallel connection of several arresters, i. Protective elements are listed as a common separating device, which is arranged virtually in the force-free space between the arresters. As a result, the separating device can be loaded with very high surge currents and the close contact with the arresters results in the desired sensitive response.

Erfindungsgemäß ist der äußere Anschlußkontakt des insbesondere steckbaren Überspannungsableiters als metallisches Formteil ausgeführt, welches einen integralen Verlängerungsschenkel aufweist.According to the invention the outer terminal contact of the particular pluggable surge arrester is designed as a metallic molded part, which has an integral extension leg.

Dieser Verlängerungsschenkel weist ein zur Lotverbindung, d.h. zur Trennstelle führendes Ende auf, das eine U-Form besitzt.This extension leg has a solder connection, i. to the separation point leading end, which has a U-shape.

Der Anschlusspunkt des Ableiterelements, z.B. einer Varistorscheibe, ist als Flächenstück ausgebildet, welches, in Anlage mit einem Abschnitt des U-förmige Endes des Formteils stehend, mit diesem durch das Lot gesichert ist.The connection point of the arrester element, e.g. a varistor disk, is formed as a surface piece which, standing in abutment with a portion of the U-shaped end of the molding, is secured thereto by the solder.

Weiterhin steht erfindungsgemäß das metallische Formteil unter Eigenfedervorspannung, wobei die Vorspannrichtung mit der Trennbewegung übereinstimmt.Furthermore, according to the invention, the metallic molded part is under inherent spring bias, the biasing direction coinciding with the separating movement.

In den von der U-Form des Formteilabschnitts umschlossenen und gebildeten Raum greift ein in einer Führung gelagerter, unter Federvorspannung stehender Finger ein, um beim Auslösen ein schnelles und sicheres elektrisches Trennen der Lotverbindung sowohl durch Unterstützung der Trennbewegung des Formteils als auch ein Verdrängen des Lotmaterials zu bewirken.In the enclosed by the U-shape of the molding portion and formed space engages a bearing mounted in a guide, spring loaded finger to a fast and safe electrical separation of the solder joint both by supporting the separation movement of the molding as well as a Displacing the solder material cause.

Die Breite und die Länge des Fingers ist dabei so ausgeführt, dass sich ein schaufelartiges Mitziehen und Wegdrücken des geschmolzenen Lotes im Abtrennfall ergibt. Unerwünschte Lotspratzer oder Lotbrücken werden durch diese konstruktive Lösung vermieden.The width and the length of the finger is designed so that there is a blade-like dragging and pushing away the molten solder in Abtrennfall. Unwanted solder scratches or solder bridges are avoided by this constructive solution.

Bei einer alternativen Ausführungsform kann die Lotverbindung als Stift oder Niet aus einem schmelzenden Material ausgeführt werden, wobei der Stift und der Niet sowohl eine Ausnehmung im Flächenstück als auch im U-förmigen Ende des Formteils durchdringt. Man kann diese Funktion quasi mit einem Sicherungssplint umschreiben, der aus einem schmelzenden Material besteht, d.h. als Verbindungslot wirkt.In an alternative embodiment, the solder connection can be made as a pin or rivet of a melting material, wherein the pin and the rivet penetrates both a recess in the surface piece and in the U-shaped end of the molding. One can rewrite this function, as it were, with a cotter pin made of a melting material, i. acts as a connecting solder.

Selbstverständlich können auch mehrere beabstandete Stifte oder Nieten aus einem schmelzenden Material ausgeführt werden, wenn dies unter Beachtung der zu führenden Stoßströme sich als notwendig erweist.Of course, a plurality of spaced pins or rivets can be made of a melting material, if this proves to be necessary taking into account the surge currents to be led.

Bei einer bevorzugten Ausführungsform verläuft das jeweilige Flächenstück des Ableiterelements parallel zu dem jeweiligen Schenkel des U-förmigen Endes des Formteils und liegt an diesem an.In a preferred embodiment, the respective surface piece of the arrester element runs parallel to the respective leg of the U-shaped end of the molded part and abuts against it.

In einer Ausgestaltung wirkt der Finger auf den Verbindungsabschnitt zwischen dem U-förmigen Schenkel des Formteils ein und zieht diesen Abschnitt durch Federkraftwirkung in Trennrichtung mit, wobei sich die Federvorspannkraft des Formteils mit derjenigen Federkraft vektoriell addiert, die auf den Finger, beispielsweise durch eine Schraubendruckfeder realisiert, einwirkt.In one embodiment, the finger acts on the connecting portion between the U-shaped leg of the molded part and pulls this section by spring force in the separating direction, wherein the spring biasing force of the molded part vectorially adds that spring force realized on the finger, for example by a helical compression spring , acts.

Die Lotverbindung ist nach Möglichkeit als einzige Lötstelle insbesondere in Form einer Lotpille ausgeführt, d.h. es sind nicht mehrere Lötverbindungen erforderlich, wie dies beim Stand der Technik notwendig ist.If possible, the solder joint is the only solder joint, in particular in the form of a solder pill, i. it does not require multiple solder joints, as is necessary in the prior art.

Der Finger kann mit einer optischen Anzeige zur Darstellung des Funktionszustands des Ableiters in Verbindung stehen. Diese optische Anzeige kann ein Schiebeelement mit entsprechend farblicher Gestaltung umfassen, welches vor ein Fenster bewegt oder aus einem Fensterbereich entfernt wird.The finger may be in communication with an optical display to represent the functional state of the trap. This optical display can comprise a sliding element with a correspondingly colored design, which moves in front of a window or is removed from a window area.

Bei einer weiteren bevorzugten Ausführungsform sind zwei scheibenförmige Ableiterelemente parallel und beabstandet voneinander angeordnet, wobei sich die jeweiligen Flächenstücke auf einander zugewandten Seiten gegenüberliegen derart, dass ein U-Schenkel des Formteils mit einem ersten Flächenstück und der weitere U-Schenkel mit einem zweiten Flächenstück zur Anlage kommt, wobei die Trennrichtung und die Trennbewegung in den Abstandsraum der Ableiterelemente hinein vorgegeben sind bzw. verlaufen.In a further preferred embodiment, two disc-shaped arrester elements are arranged parallel and spaced from each other, wherein the respective surface pieces on opposite sides facing each other such that a U-leg of the molding with a first surface piece and the other U-legs with a second surface piece to the plant comes, wherein the separation direction and the separation movement in the distance space of the arrester elements are given in or run.

Das metallische Formteil kann an seinem von der Lotverbindung weg weisenden Ende eine V-förmige Steckkontaktabwinklung aufweisen.The metallic molded part may have a V-shaped plug contact bend at its end pointing away from the soldered connection.

Bei einer Ausgestaltung kann das Flächenstück eine Abwinklung, z.B. aufgerührt in einem Winkel um 90°, besitzen, welche den Verbindungsabschnitt zwischen den Schenkel des U-förmigen Endes des Formteils außen, d.h. an einer von der Trennrichtung abgewandten Seite mindestens teilweise umgreift. Auch bei dieser konstruktiven Variante ist der Abstand der mechanischen Berührung zwischen Flächenstück und Formteil mindestens über einen Abschnitt durch ein Lotmaterial gesichert.In one embodiment, the sheet may include an angling, e.g. Stirred at an angle of 90 °, having the connecting portion between the legs of the U-shaped end of the molding outside, i. at least partially surrounds at a side facing away from the separation direction. Also in this constructive variant, the distance of the mechanical contact between surface piece and molded part is secured at least over a portion by a solder material.

Zur Erhöhung der Stabilität kann der Verlängerungsschenkel des metallischen Formteils mindestens eine einseitige oder aber auch eine zweiseitige Abkantung aufweisen. Diese Abkantung kann bis zum U-förmigen Ende des Formteils geführt werden bzw. über eine Verlängerung der Abkantungsschenkel in das U-förmige Ende übergehen.To increase the stability of the extension leg of the metallic molded part may have at least one one-sided or even a two-sided fold. This fold can be performed up to the U-shaped end of the molding or pass over an extension of the Abkantungsschenkel in the U-shaped end.

Wie bereits dargelegt, wird die Abtrennvorrichtung und der Anschluss des Üherspannungsableiters aus einem einzigen Teil, vorzugsweise bestehend aus einem metallischen, federnden Material, ausgeführt, das zu einer U-Form gebogen und mit dem jeweiligen Flächenstück oder mehreren Flächenstücken bei der Parallelschaltung von Ableitern verlötet ist. Es unterstützt damit die Federwirkung des Materials des Formteils die gewünschte Abtrennbewegung insbesondere auch dann, wenn bei mehreren parallel geschalteten Ableitern eine ungleichmäßige Erwärmung der Lotverhindung auftritt.As already stated, the separating device and the connection of the surge arrester is made of a single part, preferably consisting of a metallic, resilient material, which is bent into a U-shape and soldered to the respective surface piece or several surface pieces in the parallel connection of arresters , It thus supports the spring action of the material of the molded part, the desired separation movement in particular, even if a plurality of parallel-connected arresters uneven heating of Lotverhindung occurs.

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

Hierbei zeigen:Hereby show:

Fig. 1 eine perspektivische Darstellung eines Moduls für einen steckbaren Überspannungsableiters mit Abtrennvorrichtung und abgenommenem Außengehäuse; Fig. 1 a perspective view of a module for a pluggable surge arrester with disconnecting device and removed outer housing;

Fig. 2 eine analoge Darstellung derjenigen nach Fig. 1, jedoch in Seitenansicht; Fig. 2 an analogous representation of those after Fig. 1 but in side view;

Fig. 3 eine Darstellung des Überspannungsableiters gemäß derjenigen nach Fig. 2, jedoch mit entfernter Tragplatte; Fig. 3 a representation of the surge arrester according to those after Fig. 2 but with the support plate removed;

Fig. 4 und 5 Darstellungen des Überspannungsableiters im abgetrennten Zustand; Fig. 4 and 5 Representations of the surge arrester in the separated state;

Fig. 6 und 7 Draufsicht und perspektivische Darstellung eines ersten Ausführungsbeispiels der Ausbildung der Abtrennvorrichtung bei der Verwendung von zwei parallel geschalteten scheibenförmigen Ableitern, insbesondere Varistoren; Fig. 6 and 7 Top view and perspective view of a first embodiment of the embodiment of the separation device in the use of two parallel disc-shaped conductors, in particular varistors;

Fig. 8 ein zweites Ausführungsbeispiel der Abtrennvorrichtung mit einem Niet oder einem Stift aus einem schmelzenden Material; Fig. 8 a second embodiment of the separating device with a rivet or a pin made of a melting material;

Fig. 9 eine Darstellung der einzigen Lotverbindung als Lotpille ausgeführt; Fig. 9 a representation of the single solder joint executed as Lotpille;

Fig. 10 ein drittes Ausführungsbeispiel der Abtrennvorrichtung, wobei die Flächenstücke der Ableiter eine Abwinklung aufweisen und das metallische Formteil außenseitig umgreifen; Fig. 10 a third embodiment of the separating device, wherein the surface pieces of the arrester have an angled portion and engage around the metallic molded part on the outside;

Fig. 11 eine Darstellung einer Ausführungsform ähnlich derjenigen nach Fig. 9, jedoch mit nur einem Varistor; Fig. 11 a representation of an embodiment similar to that after Fig. 9 but with only one varistor;

Fig. 12 eine Darstellung derjenigen ähnlich Fig. 8, jedoch nur mit einem Ableiter und Fig. 12 a representation of those similar Fig. 8 , but only with one arrester and

Fig. 13 eine Darstellung der Abtrennvorrichtung nach Fig. 11 mit Finger und optischer Anzeige zur Signalisierung des Funktionszustands der Abtrennvorrichtung bzw. des eingesetzten Ableiters. Fig. 13 an illustration of the separation device according to Fig. 11 with finger and optical display for signaling the functional state of the separating device or of the arrester used.

Bei den Darstellungen gemäß Figuren wird von einer Abtrennvorrichtung für insbesondere steckbare Überspannungsableiter ausgegangen, welche als Steckmodul 1, umfassend einen oder mehrere Ableiter, z.B. in Form von Varistoren, ausgeführt werden können.In the illustrations according to figures, it is assumed that a disconnecting device for in particular pluggable surge arresters, which as a plug-in module 1, comprising one or more arresters, e.g. in the form of varistors, can be performed.

Das beispielsweise in Fig. 1 gezeigte Steckmodul 1 weist ein mechanisches Stützteil 2 auf, welches zur Befestigung und zur Aufnahme von Varistorscheiben 3 (siehe Fig. 6) dient.This example in Fig. 1 plug-in module 1 shown has a mechanical support member 2, which for attachment and for receiving Varistorscheiben 3 (see Fig. 6 ) serves.

Eine Tragplatte 4 dient unter anderem der Aufnahme einer Anzeigevorrichtung 5, die z.B. als Schieber realisiert werden kann.A support plate 4 serves inter alia to receive a display device 5, e.g. can be realized as a slide.

Durch eine Lageveränderung der Anzeigevorrichtung 5 kann ein farbiges Feld, das auf der Tragplatte 4 vorhanden ist, bezogen auf ein im Außengehäuse enthaltenes Fenster (nicht gezeigt) geöffnet oder geschlossen werden.By a change in position of the display device 5, a colored field, which is present on the support plate 4, based on a window contained in the outer housing (not shown) can be opened or closed.

Das Steckmodul 1 weist darüber hinaus äußere Anschlusskontakte 6 auf, die zur elektrischen Kontaktierung in Verbindung mit einem Gegenkontaktstück eines Sockelteils (nicht gezeigt) dienen.The plug-in module 1 also has external connection contacts 6, which serve for electrical contacting in conjunction with a mating contact piece of a base part (not shown).

Der für die erfindungsgemäße Abtrennvorrichtung maßgebliche Anschlusskontakt 6 (in Fig. 1 im rechten Bildteil erkennbar) ist als metallisches Formteil ausgebildet, welches einen integralen Verlängerungsschenkel 7 aufweist. Unter dieser integralen Ausführungsform wird verstanden, dass der betreffende Anschlusskontakt mit dem Verlängerungsachenkel 7 einstückig gefertigt ist.The decisive for the separation device according to the invention terminal contact 6 (in Fig. 1 recognizable in the right part of the picture) is formed as a metallic molded part, which has an integral extension leg 7. Under this integral embodiment, it is understood that the relevant terminal contact with the extension arm 7 is made in one piece.

Das zur Lotverbindung 8 (siehe Fig. 9) weisende Ende des Verlängerungsschenkels 7 besitzt eine U-Form 9.The solder joint 8 (see Fig. 9 ) facing end of the extension leg 7 has a U-shape. 9

Der Anschlusspunkt des Ableiterelements, z.B. einer Varistorscheibe 3, ist als Flächenstück 10 ausgebildet, welches, in Anlage mit einem Abschnitt des U-förmigen Endes 9 des Formteils stehend, mit diesem durch die Lotverbindung 8 gesichert ist.The connection point of the arrester element, e.g. a varistor disk 3, is formed as a surface piece 10, which, standing in abutment with a portion of the U-shaped end 9 of the molding is secured with this by the solder joint 8.

Das metallische Formteil, d.h. der Verlängerungsschenkel 7, steht unter einer Eigenfedervorspannung.The metallic molding, i. the extension leg 7, is under a natural spring bias.

In den von der U-Form 9 des Formteilabschnitts umschlossenen und gebildeten Raum ist ein in einer Führung gelagerter unter Federvorspannkraft stehender Finger 11 eingreifend, um beim Auslösen ein schnelles und sicheres elektrisches Trennen der Lotverbindung 8 sowohl durch Unterstützung der Trennbewegung des Formteils als auch durch Verdrängen des Lotmaterials zu bewirken.In the space enclosed and formed by the U-shape 9 of the molding portion, a spring-loaded finger 11 mounted in a guide is engaged to cause rapid and safe electrical disconnection of the solder joint 8 by both assisting the separation movement of the molding and displacing it to effect the soldering material.

Anhand der Fig. 3 ist dargestellt, wie der Finger 11 über ein Führungsteil 12 beweglich gelagert ist, wobei das Führungsteil 12 eine Schraubendruckfeder 13 aufnimmt.Based on Fig. 3 is shown as the finger 11 is movably mounted on a guide member 12, wherein the guide member 12 receives a helical compression spring 13.

Die Schraubendruckfeder 13 sorgt dafür, dass der Finger 11 unter Vorspannung im Bild Richtung nach links steht. Diese Vorspannrichtung weist also den gleichen Vektor wie derjenige auf, welcher durch die Eigenfederkraft des Verlängerungsschenkels 7 geprägt ist.The helical compression spring 13 ensures that the finger 11 is biased in the image direction to the left. This biasing direction thus has the same vector as that which is characterized by the inherent spring force of the extension leg 7.

Die Fig. 3 macht auch deutlich, dass die Abtrennvorrichtung gemäß der Erfindung auch mit einer weiteren thermisch auslösbaren Anzeige 14 kombiniert werden kann, um beispielsweise das Erreichen einer ersten Grenztemperatur zu signalisieren, die noch nicht zu einer relevanten Beeinträchtigung der Lotverbindung 8 führt.The Fig. 3 also makes it clear that the separating device according to the invention can also be combined with a further thermally triggerable display 14 in order to signal, for example, the reaching of a first limit temperature which does not yet lead to a relevant impairment of the solder connection 8.

Während die Fig. 3 den Zustand der in Funktion befindlichen Verbindung zwischen Anschlusskontakt 6 und Flächenstück 10 darstellt, ist mit den Fig. 4 und 5 der abgetrennte Zustand deutlich gemacht, wobei auch ersichtlich ist, dass sich die Anzeigevorrichtung 5 im Bild nach links verschoben hat.While the Fig. 3 represents the state of the in-service connection between terminal contact 6 and surface piece 10, with the Fig. 4 and 5 the disconnected state made clear, and it can also be seen that the display device 5 has moved in the image to the left.

Beim Abtrennvorgang wirkt die Kraft der Schraubendruckfeder 13 auf den Finger 11 und damit auf das schmelzende Lot der Lotverbindung 8 ein. Die Federvorspannung des metallischen Formteils erzeugt ebenfalls eine Kraft in Abtrennrichtung (Pfeildarstellung).During the separation process, the force of the helical compression spring 13 acts on the finger 11 and thus on the melting solder of the solder connection 8. The spring preload of the metallic molding also generates a force in the separation direction (arrow).

Die Detaildarstellung nach Fig. 6 zeigt zwei beabstandete Varistorscheiben mit jeweils einem Flächenstück 10 zum elektrische Anschluss.The detailed representation after Fig. 6 shows two spaced Varistorscheiben each with a patch 10 for electrical connection.

Das U-förmige Ende 9 des metallischen Formteils kommt mit seinen Außenseiten der U-Schenkel mit einer Außenseite des jeweiligen Flächenstücks 10 in Berührung (siehe auch perspektivische Darstellung nach Fig. 7).The U-shaped end 9 of the metallic molded part comes with its outer sides of the U-legs with an outer side of the respective surface piece 10 in contact (see also perspective view Fig. 7 ).

Über Ausnehmungen 15 bzw. Bohrungen sowohl im jeweiligen Flächenstück 10 als auch im entsprechenden Schenkel des U-förmigen Teils 9 kann gemäß der Darstellung nach Fig. 8 ein Stift oder ein Niet 16 aus einem schmelzenden Material fixiert werden, welcher die Trennstelle bis zum Erreichen des Schmelzpunkts des Niet- oder Stiftmateiials sichert.About recesses 15 and holes both in the respective surface piece 10 as also in the corresponding leg of the U-shaped part 9 can according to the illustration according to Fig. 8 a pin or rivet 16 may be fixed from a melting material which secures the point of separation until the melting point of the rivet or stud material is reached.

Gemäß der Darstellung nach Fig. 9 kann auch eine Lotverbindung 8 als Lotpille realisiert werden. Selbstverständlich ist auch eine Kombination Niet / Stift 16 und Lotverbindung 8 als Lotpille realisierbar.As shown Fig. 9 can also be a solder joint 8 can be realized as Lotpille. Of course, a combination rivet / pin 16 and 8 solder joint as Lotpille feasible.

Bei dem dritten Ausführungsbeispiel nach Fig. 10 weist der Verlängerungsschenkel 7 eine Gestalt auf, wonach zwei Abkantungen in Richtung des Raums orientiert sind, welcher von den beiden beabstandeten Varistorscheiben 3 gebildet wird.According to the third embodiment Fig. 10 the extension leg 7 has a shape, after which two bends are oriented in the direction of the space, which is formed by the two spaced Varistorscheiben 3.

In diesem Fall besitzen die Flächenstücke 10 jeweils eine Abkantung 17, die den Verlängerungsschenkel 7 außenseitig, d.h. von der Trennrichtung abgewandt umgreifen.In this case, the patches 10 each have a fold 17, which the extension leg 7 on the outside, i. surround away from the separation direction.

Auch bei dieser Ausführungsform sichert eine Lotverbindung die Position des Verlängerungsrhenkels 7 bezüglich der Lage der mit einer Abkantung 17 versehenen Flächenstücke 10.In this embodiment too, a solder joint secures the position of the extension leg 7 with respect to the position of the patches 10 provided with a fold 17.

Die Darstellungen nach den Fig. 11 und 12 zeigen eine Variante der Abtrennvorrichtung jeweils teilkomplettiert, jedoch noch ohne Anzeigevorrichtung 5 und dem geführten Finger 11. Letztere Elemente sind in der Darstellung nach Fig. 13 erkennbar.The representations after the Fig. 11 and 12 show a variant of the separating device in each case partially completed, but still without display device 5 and the guided finger 11. The latter elements are shown in the illustration Fig. 13 recognizable.

Hier wird auch ersichtlich, wie der Finger 11 mindestens teilweise in die Lotverbindung 8 eintaucht, so dass beim Schmelzen des Lotes durch den Finger 11 ein Mitreißen und Wegbewegen des Lotmaterials von der Trennstelle erfolgen kann.Here is also apparent how the finger 11 at least partially immersed in the solder joint 8, so that when melting the solder by the finger 11 entrainment and removal of the solder material can be carried out from the separation point.

Das metallische Formteil mit dem Verlängerungsschenkel 7 besitzt bevorzugt stabilitätserhöhende Konturen 18, die als Sicke oder Abwinklung ausführbar sind.The metallic molded part with the extension leg 7 preferably has stability-increasing contours 18, which can be executed as beading or bending.

Außerdem weist das metallische Formteil an seinem von der Lotverbindung 8 weg weisenden Ende eine V-förmige Steckkontaktabwinklung auf.In addition, the metallic molded part at its end pointing away from the solder joint 8 on a V-shaped Steckkontaktabwinklung.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

  • 1 Steckmodul1 plug-in module
  • 2 mechanisches Stützteil2 mechanical support part
  • 3 Varistorscheibe3 varistor disk
  • 4 Tragplatte4 support plate
  • 5 Anzeigevorrichtung5 display device
  • 6 Anschlusskontakt6 connection contact
  • 7 Verlängerungsschenkel7 extension legs
  • 8 Lotverbindung8 solder joint
  • 9 U-Form9 U shape
  • 10 Flächenstück10 area piece
  • 11 Finger11 fingers
  • 12 Führungsteil12 guide part
  • 13 Schraubendruckfeder13 helical compression spring
  • 14 thermisch auslösbare weitere Anzeige14 thermally triggered further display
  • 15 Ausnehmung15 recess
  • 16 Niet / Stift16 rivet / pin
  • 17 Abkantung17 fold
  • 18 Kontur18 contour
  • 19 Steckkontaktabwinklung19 plug contact bend

Claims (11)

  1. Disconnector, particularly for pluggable surge arresters, wherein the disconnection point is realized as a thermally triggered soldered connection (8) between an outer connection contact of the arrester and a connection point of the at least one arrester element (3), for example a varistor disk, and wherein furthermore a preload in the separating direction is applied to the soldered connection,
    wherein
    at least one outer connection contact (6) is realized as a metallic formed part, which comprises an integral extension leg (7) whose end pointing to the soldered connection (8) has a U-shape (9),
    the connection point of the arrester element (3) is formed as a planar piece (10) which is adjacent to a section of the U-shaped end (9) of the formed part and is secured thereto by a solder,
    the metallic formed part is subject to an inherent spring preload and a finger (11) subject to a spring preload and mounted on a guide (12) engages into the space formed and encompassed by the U-shape (9) of the formed part section in order to bring about a quick and secure electrical separation of the soldered connection (8) when triggered, both by supporting the separation movement of the formed part and the displacement of the solder material.
  2. Disconnector according to claim 1,
    characterized in that
    the soldered connection is realized as a pin or rivet (16) of a melting material, wherein the pin or the rivet (16) penetrates through both a recess (15) in the planar piece (10) and in the U-shaped end (9) of the formed part.
  3. Disconnector according to claim 1 or 2,
    characterized in that
    the respective planar piece (10) of the arrester element (3) extends parallel to the respective leg of the U-shaped end (9) of the formed part adjacent to the same.
  4. Disconnector according to one of the preceding claims,
    characterized in that
    the finger (11) acts onto the connecting section between the U-legs of formed part.
  5. Disconnector according to claim 1,
    characterized in that
    the soldered connection (8) is realized as a single solder pill.
  6. Disconnector according to one of the preceding claims,
    characterized in that
    the finger (11) is connected to a visual display (5) for displaying the functional state of the arrester (3).
  7. Disconnector according to one of the preceding claims,
    characterized in that
    two disk-shaped arrester elements (3) are arranged parallel to and spaced apart from each other, wherein the respective planar pieces (10) are provided opposite each other on sides pointing to each other in the surge-current-sided zero-force space in such a way that one U-leg of the formed part is adjacent a first planar piece and the other U-leg is adjacent a second planar piece, wherein the separating direction and the separating motion into the spaced-apart space of the arrester elements (3) are predefined or extend into the same.
  8. Disconnector according to one of the preceding claims,
    characterized in that
    the metallic formed part comprises a V-shaped plug-contact bend (19) at its end pointing away from the soldered connection (8).
  9. Disconnector according to claim 1,
    characterized in that
    the planar piece (10) has a bend (17) which at least partially encompasses the connecting section between the legs of the U-shaped end (9) of the formed part on the outside, that is, on the side pointing away from the separating direction.
  10. Disconnector according to claim 1,
    characterized in that
    the extension leg (7) of the metallic formed part comprises at least one contour (18).
  11. Disconnector according to claim 10,
    characterized in that
    the contour is passed as a chamfer until the U-shaped end (9) of the formed part.
EP07730033A 2006-07-19 2007-06-11 Disconnector for a surge arrester particularly for a pluggable surge arrester Expired - Fee Related EP2050105B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006033464 2006-07-19
DE102006042028A DE102006042028B3 (en) 2006-07-19 2006-09-07 Separation device for pluggable surge arrester, has metallic form part and finger standing under self-spring stress, where finger is supported at guide and is engaged into space closed by u-shaped end of metallic form part
PCT/EP2007/055683 WO2008009513A1 (en) 2006-07-19 2007-06-11 Arresting device particularly for a pluggable surge arrester

Publications (2)

Publication Number Publication Date
EP2050105A1 EP2050105A1 (en) 2009-04-22
EP2050105B1 true EP2050105B1 (en) 2009-11-25

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Application Number Title Priority Date Filing Date
EP07730033A Expired - Fee Related EP2050105B1 (en) 2006-07-19 2007-06-11 Disconnector for a surge arrester particularly for a pluggable surge arrester

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Country Link
EP (1) EP2050105B1 (en)
DE (1) DE102006042028B3 (en)
WO (1) WO2008009513A1 (en)

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Publication number Priority date Publication date Assignee Title
CZ2009164A3 (en) * 2009-03-16 2010-09-29 Cernicka@Jozef Overvoltage protection device
CZ308826B6 (en) * 2009-10-19 2021-06-23 KIWA sk, s.r.o Surge protection equipment
FR2958789B1 (en) * 2010-04-09 2012-05-11 Abb France DEVICE FOR PROTECTION AGAINST TRANSIENT OVERVOLTAGES WITH IMPROVED THERMAL DISCONNECTOR
CN101887790B (en) * 2010-06-13 2012-07-04 深圳科安达电子科技股份有限公司 Piezoresistor for lightning protection
DE102011100437B4 (en) 2010-10-29 2016-04-07 Dehn + Söhne Gmbh + Co. Kg Arrangement for forming a thermal separation point
DE102015000331A1 (en) * 2015-01-09 2016-07-14 DEHN + SÖHNE GmbH + Co. KG. Contact arrangement for pluggable surge arresters
ITUB20152327A1 (en) * 2015-07-20 2017-01-20 Zotup S R L IMPROVED DISCONNECTOR AND OVERVOLTAGE RELEASE INCLUDING THIS DISCONNECTOR
DE102018212690A1 (en) * 2018-07-30 2020-01-30 Phoenix Contact Gmbh & Co. Kg Space-saving separation device
FR3107781B1 (en) * 2020-02-27 2023-06-30 Legrand France Electrical device against transient overvoltages and a thermal runaway detection varistor device

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Publication number Priority date Publication date Assignee Title
DE4042237A1 (en) * 1990-01-08 1991-07-11 Bettermann Obo Ohg Plug-in voltage overload conductor - is formed with varistor elements coupled together in housing
DE9305796U1 (en) * 1993-04-17 1993-06-17 Dehn + Söhne GmbH + Co KG, 8500 Nürnberg Surge protection arrangement with a varistor housed in a housing
FR2727806A1 (en) * 1994-12-05 1996-06-07 Soule Sa PROTECTION DEVICE AGAINST TRANSIENT OVERVOLTAGES BASED ON VARISTORS AND THERMAL DISCONNECTORS
DE29519313U1 (en) * 1995-12-06 1996-01-25 Dehn + Söhne GmbH + Co KG, 90489 Nürnberg Surge arresters
DE102004024657B4 (en) * 2004-04-02 2006-12-21 Dehn + Söhne Gmbh + Co. Kg Arrangement for dissipating overvoltages with parallel-connected overvoltage-limiting elements in a structural unit

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DE102006042028B3 (en) 2007-09-27
EP2050105A1 (en) 2009-04-22
WO2008009513A1 (en) 2008-01-24

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