EP3411932B1 - Arrester for surge protection - Google Patents

Arrester for surge protection Download PDF

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Publication number
EP3411932B1
EP3411932B1 EP17701496.6A EP17701496A EP3411932B1 EP 3411932 B1 EP3411932 B1 EP 3411932B1 EP 17701496 A EP17701496 A EP 17701496A EP 3411932 B1 EP3411932 B1 EP 3411932B1
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EP
European Patent Office
Prior art keywords
projection
wall
electrode
arrester
discharge chamber
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.)
Active
Application number
EP17701496.6A
Other languages
German (de)
French (fr)
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EP3411932A1 (en
Inventor
Eduard DORSCH
Frank Werner
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.)
TDK Electronics AG
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TDK Electronics AG
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Publication of EP3411932A1 publication Critical patent/EP3411932A1/en
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Publication of EP3411932B1 publication Critical patent/EP3411932B1/en
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Classifications

    • 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
    • H01T1/02—Means for extinguishing arc
    • H01T1/08—Means for extinguishing arc using flow of arc-extinguishing fluid
    • H01T1/10—Means for extinguishing arc using flow of arc-extinguishing fluid with extinguishing fluid evolved from solid material by heat of arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
    • 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
    • H01T1/12—Means structurally associated with spark gap for recording operation thereof
    • 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
    • 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
    • H01T1/24—Selection of materials for electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
    • H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed

Definitions

  • An arrester for protection against overvoltages is specified.
  • it is a gas-filled arrester.
  • a surge arrester is, for example, from the publication DE 10 2008 029 094 A1 known. It is described here how the arrester is provided with a gradation in the ceramic in order to lengthen the wall-side insulation distance between the electrodes. In addition, from the DE 43 09 610 A1 known to form a flange on an insulating inner surface of a discharge vessel.
  • An arrester for protection against overvoltages which has a first electrode and a second electrode.
  • the electrodes each have an electrically conductive material.
  • the arrester has a discharge space to enable an electrical discharge between the electrodes in the event of an overvoltage.
  • a discharge in particular an arc discharge, should therefore take place between the electrodes in the discharge space.
  • the discharge space is formed, for example, by an area between the electrodes, in particular by an area in which the distance between the electrodes is particularly small.
  • the discharge space can be filled with a gas, in particular an inert gas.
  • the first electrode can have a different geometry than the second electrode.
  • the first electrode is designed in the form of a pin and the second electrode is designed in the geometry of a hollow cylinder. The first electrode protrudes into the cavity of the second electrode.
  • the arrester has an insulator.
  • the insulator has a ceramic.
  • the insulator forms an inner wall of the arrester.
  • the arrester has the shape of a cylinder.
  • the insulator forms the lateral surface of the cylinder.
  • the electrodes are galvanically separated from each other by the insulator. An insulating space is formed between the conductor and the electrodes.
  • a discharge between the electrodes can lead to evaporation of electrode material.
  • the discharge space has, for example, an outlet opening through which the vaporized electrode material can leave the discharge space.
  • the evaporated electrode material can then condense on the inner wall of the insulator. This leads to a reduction in the insulation resistance of the insulator.
  • an electrically conductive bridge can build up between the electrodes via the inner wall and thus impermissibly high leakage currents can occur.
  • the inner wall of the insulator has a protrusion.
  • the projection is intended to ensure that the insulator has sufficient insulation resistance.
  • the projection is designed in such a way that it is an impurity at least one Part of the inner wall obstructed by vaporized electrode material escaping from the discharge space.
  • the projection is intended to prevent the formation of an electrically conductive path that galvanically connects the electrodes to one another.
  • the projection also leads, for example, to an extension of a wall-side insulation gap between the electrodes.
  • the wall thickness of the insulator is preferably not reduced by the projection, so that the mechanical stability of the conductor is maintained.
  • At least one of the electrodes extends along a direction, in particular a vertical direction, of the conductor into the discharge space, with the projection protruding perpendicular to this direction.
  • the inner wall has a first wall area and a second wall area.
  • the first and the second wall area run, for example, parallel to the vertical direction of the conductor.
  • the inner wall is divided into the two wall areas by the projection.
  • the first wall area lies in front of the projection and the second wall area lies behind the projection coming from the unloading space.
  • the vaporized electrode material occurs in the discharge space, the vaporized electrode material thus first reaches the first wall area, then the projection and then the second wall area.
  • the projection forms in particular an obstacle for the evaporated electrode material, so that only part of the evaporated electrode material that reaches the projection also reaches the second wall region via the projection.
  • the projection becomes a path for the vaporized electrode material narrows.
  • the projection can form a narrowing of the insulation space.
  • the evaporated electrode material preferably has to overcome the projection in order to reach the second wall area. In other words, there is preferably no path for the vaporized electrode material to the second wall region that does not lead over the projection.
  • the projection is circumferential.
  • the projection runs around the inner wall of the insulator at a fixed height.
  • the height of the projection is less than the height of the inner wall of the arrester.
  • the height of the projection is significantly less than the height of the inner wall. The projection thus represents only a local change in the geometry of the inner wall. In particular, the insulation space is narrowed only locally by the projection, so that the overall insulation space is only slightly reduced.
  • the projection is offset from half the height of the inner wall.
  • one of the wall areas is larger than the other wall area.
  • the first wall area can be larger than the second wall area.
  • the second wall area should be large enough to be able to effectively prevent the formation of electrically conductive paths.
  • the projection is arranged in relation to the outlet opening in such a way that evaporated electrode material does not strike the projection frontally. In this case, the shielding effect of the projection could be reduced. In one embodiment, the projection is offset in relation to a height position of an outlet opening of the unloading space.
  • the projection is arranged laterally next to one of the electrodes. There is only a gas-filled space between the projection and this electrode.
  • the electrode has an end located within the discharge space and an end opposite thereto. According to the invention, the projection is further away from the end of the electrode arranged within the discharge space than from the end opposite thereto. In this way, it can be prevented that the evaporation of the inner wall is concentrated on too small an area in front of the projection.
  • the projection is formed in the shape of an edge.
  • the underside of the projection is formed in the shape of an edge.
  • the side of the projection that adjoins the second wall area is referred to as the underside.
  • the underside encloses an angle of less than 90° with the second wall area.
  • This shadow space includes, for example, the lower edge of the projection and a part of the second wall area adjoining it.
  • Figure 1A shows a sectional view of an arrester 1 for protection against overvoltages.
  • the arrester 1 has, for example, a cylindrical design.
  • the conductor 1 has a first electrode 2 and a second electrode 3 .
  • the electrodes 2, 3 each have an electrically conductive material.
  • the electrodes 2, 3 have copper.
  • the first electrode 2 projects into the interior of the arrester 1 in the form of a pin.
  • the second electrode 3 protrudes, for example in the form of a hollow cylinder, into the interior of the arrester 1 and partially surrounds the first electrode 2 .
  • the conductor 1 has an insulator 4 .
  • the insulator 4 has an insulating material such as ceramic or glass.
  • the insulator 4 forms, for example, the lateral surface of the arrester 1.
  • the insulator 4 forms an inner wall 5 of the arrester 1.
  • the conductor 1 also has a first contact electrode 6, which is electrically conductively connected to the first electrode 2, and a second contact electrode 7, which is electrically conductively connected to the second electrode 3.
  • the contact electrodes 6, 7 form, for example, the top and bottom surfaces of the conductor 1.
  • the diverter 1 is, for example, hermetically sealed to the outside.
  • the conductor 1 can be filled with a gas, in particular an inert gas.
  • the arrester 1 has a discharge chamber 8 in which a discharge 9, in particular an arc discharge, occurs between the electrodes 2, 3 when an activation voltage is exceeded.
  • the discharge space 8 is formed between the electrodes 2, 3, in particular in an area in which the distance between the electrodes 2, 3 is the smallest.
  • the electrodes 2, 3 are spaced from the inner wall 5.
  • FIG. The second electrode 3 is closer to the inner wall 5 than the first electrode 2.
  • the insulating space 10 is filled with gas, for example.
  • Electrode material can evaporate from the electrodes 2, 3 in the event of a discharge 9, in particular in the case of repeated surge current loads.
  • the vaporized electrode material 11 leads, for example, to contamination of the ionized gas.
  • the vaporized electrode material 11 can exit the discharge space 8 through an exit opening 12 and penetrate to the insulation space 10 .
  • the inner wall 5 of the insulator 4 can be vaporized with electrode material 11 . This can lead to a reduction in the insulation resistance of the inner wall 5 and thus to a deterioration in functionality.
  • the vapor deposition can lead to the formation of an electrically conductive bridge between the electrodes 2 , 3 via the inner wall 5 . For example, this can result in impermissibly high leakage currents when operating at nominal AC voltage.
  • the inner wall 5 has a projection 13 to maintain a sufficient insulation resistance.
  • the projection 13 is part of the insulator 4 and is therefore made of insulating material.
  • the projection 13 is formed, for example, circumferentially along the inner wall 5 .
  • the projection 13 is ring-shaped.
  • the projection 13 projects into the insulation space 10 .
  • the projection 13 is located in the insulating space 10 between the insulator 4 and the second electrode 3.
  • the height h of the projection 13, i.e. the extension of the projection 13 in the direction from one contact electrode 6 to the opposite contact electrode 7, is significantly less than the total height H of the inner wall 5.
  • the gas volume in the insulating space 10 is only slightly reduced by the projection 13.
  • the height h of the projection 13 is less than or equal to a quarter of the height H of the inner wall 5.
  • the projection 13 is offset in relation to half the height of the inner wall 5 .
  • the projection 13 is therefore not arranged centrally on the inner wall 5 . Furthermore, the projection 13 is not arranged at the level of the outlet opening 12 .
  • the projection 13 divides the insulating space 10 into a first spatial area 14 and a second spatial area 15.
  • the vaporized electrode material 11 emerging from the discharge space 8 reaches the first spatial area 14 first.
  • the second spatial area 15 is located behind the first spatial area 14 and behind the projection 13.
  • the second spatial area 15 is for example significantly smaller than the first spatial area 14.
  • the projection 13 forms a local constriction of the insulation space 10 . This prevents the vaporized electrode material 11 from penetrating into the second space 15 through the projection 13 , so that only a reduced amount of the vaporized electrode material 11 gets into the second space 15 . The advance of the evaporated electrode material 11 into the first space 14 is not impeded.
  • the projection 13 divides the inner wall 5 into a first wall area 16 and a second wall area 17.
  • the second wall area 17 lies behind the projection 13 and is thus shaded by the projection 13. This prevents the vapor deposition of the second wall area 17, so that a sufficient insulation resistance is maintained.
  • the vapor deposition of the first wall area 16 is not impeded.
  • the vaporization of the first wall area 16 can even be increased somewhat by the projection 13 .
  • the first wall area 16 and the second wall area 17 are arranged parallel to the vertical direction of the conductor 1 .
  • the second wall area 17 is significantly smaller than the first wall area 16.
  • the projection 13 lengthens the insulation distance between the electrodes 2, 3 on the wall side.
  • the wall thickness of the insulator 4 is not reduced by the projection 13, so that the stability of the insulator 4 against mechanical stress during the current pulse is maintained.
  • the projection 13 is arranged laterally next to the second electrode 3 .
  • the projection 13 is further away from the end of the second electrode 3 arranged within the discharge space 8 than from the end opposite thereto, which adjoins the second contact electrode 7 .
  • the distance from the projection 13 to the end of the second electrode 3 arranged within the discharge space 8 is at least twice as large as the distance to the end adjoining the second contact electrode 7 .
  • the distance is defined, for example, as a difference in height between a center plane through the projection 13 and the respective end of the electrode 3 . Positioning the projection 13 in this way can prevent the evaporation of the inner wall from being concentrated on too small an area in front of the projection.
  • Figure 1B shows an enlarged detailed view of an area of arrester 1.
  • the area shown is in Figure 1A marked by a circle.
  • the projection 13 is edge-shaped.
  • the projection 13 has an edge 19 on its underside 18 .
  • the underside 18 of the projection 13 encloses an acute angle ⁇ with the second wall area 17, for example, i.e. an angle of less than 90°.
  • the angle ⁇ is less than 80°.
  • the angle ⁇ is less than 80° and greater than 30°.
  • the angle ⁇ can also be less than or equal to 90°.
  • An upper side of the projection 13 is designed, for example, to correspond to the lower side 18 and can in particular have a point with the first wall area 16 include angles.
  • the geometry of the projection 13 can also be described as stepped.
  • the projection 13 forms a first step in relation to the first wall area 16 and a second step in relation to the second wall area 17 .
  • a shadow space 20 is formed behind the projection 13, for example.
  • the steaming is additionally reduced.
  • the underside 18 of the projection 13 and an adjoining part of the second wall area are in the shadow space 20.

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Description

Es wird ein Ableiter zum Schutz vor Überspannungen angegeben. Insbesondere handelt es sich um einen gasgefüllten Ableiter.An arrester for protection against overvoltages is specified. In particular, it is a gas-filled arrester.

Ein Überspannungsableiter ist beispielsweise aus der Druckschrift DE 10 2008 029 094 A1 bekannt. Hier wird beschrieben, den Ableiter mit einer Abstufung in der Keramik zu versehen, um die wandseitige Isolationsstrecke zwischen den Elektroden zu verlängern. Darüber hinaus ist aus der DE 43 09 610 A1 bekannt, einen Flansch an einer isolierenden Innenfläche eines Entladungsgefäßes auszubilden.A surge arrester is, for example, from the publication DE 10 2008 029 094 A1 known. It is described here how the arrester is provided with a gradation in the ceramic in order to lengthen the wall-side insulation distance between the electrodes. In addition, from the DE 43 09 610 A1 known to form a flange on an insulating inner surface of a discharge vessel.

Es ist eine Aufgabe der vorliegenden Erfindung einen Ableiter mit verbesserten Eigenschaften anzugeben.It is an object of the present invention to specify an arrester with improved properties.

Es wird ein Ableiter zum Schutz vor Überspannungen angegeben, der eine erste Elektrode und eine zweite Elektrode aufweist. Die Elektroden weisen jeweils ein elektrisch leitfähiges Material auf. Der Ableiter weist einen Entladeraum zur Ermöglichung einer elektrischen Entladung zwischen den Elektroden bei einer Überspannung auf. Bei einer Überspannung soll somit im Entladeraum eine Entladung, insbesondere eine Lichtbogenentladung, zwischen den Elektroden stattfinden. Der Entladeraum wird beispielsweise von einem Bereich zwischen den Elektroden gebildet, insbesondere von einem Bereich, in dem der Abstand der Elektroden besonders klein ist. Der Entladeraum kann mit einem Gas, insbesondere einem Edelgas, gefüllt sein.An arrester for protection against overvoltages is specified, which has a first electrode and a second electrode. The electrodes each have an electrically conductive material. The arrester has a discharge space to enable an electrical discharge between the electrodes in the event of an overvoltage. In the event of an overvoltage, a discharge, in particular an arc discharge, should therefore take place between the electrodes in the discharge space. The discharge space is formed, for example, by an area between the electrodes, in particular by an area in which the distance between the electrodes is particularly small. The discharge space can be filled with a gas, in particular an inert gas.

Die erste Elektrode kann eine andere Geometrie aufweisen als die zweite Elektrode. Gemäß der Erfindung ist die erste Elektrode stiftförmig ausgebildet und die zweite Elektrode in Geometrie eines Hohlzylinders ausgebildet. Die erste Elektrode ragt in den Hohlraum der zweiten Elektrode hinein.The first electrode can have a different geometry than the second electrode. According to the invention, the first electrode is designed in the form of a pin and the second electrode is designed in the geometry of a hollow cylinder. The first electrode protrudes into the cavity of the second electrode.

Der Ableiter weist einen Isolator auf. Beispielsweise weist der Isolator eine Keramik auf. Der Isolator bildet eine Innenwand des Ableiters. Beispielsweise weist der Ableiter die Form eines Zylinders auf. Der Isolator bildet die Mantelfläche des Zylinders. Durch den Isolator werden die Elektroden galvanisch voneinander getrennt. Zwischen dem Ableiter und den Elektroden ist ein Isolationsraum ausgebildet.The arrester has an insulator. For example, the insulator has a ceramic. The insulator forms an inner wall of the arrester. For example, the arrester has the shape of a cylinder. The insulator forms the lateral surface of the cylinder. The electrodes are galvanically separated from each other by the insulator. An insulating space is formed between the conductor and the electrodes.

Bei einer Entladung zwischen den Elektroden kann es zu einer Verdampfung von Elektrodenmaterial kommen. Der Entladeraum weist beispielsweise eine Austrittsöffnung auf, durch die das verdampfte Elektrodenmaterial den Entladeraum verlassen kann. Das verdampfte Elektrodenmaterial kann sich dann auf der Innenwand des Isolators niederschlagen. Dies führt zu einer Herabsetzung des Isolationswiderstandes des Isolators. Insbesondere kann es zum Aufbau einer elektrisch leitenden Brücke zwischen den Elektroden über die Innenwand und damit zu unzulässig hohen Leckströmen kommen.A discharge between the electrodes can lead to evaporation of electrode material. The discharge space has, for example, an outlet opening through which the vaporized electrode material can leave the discharge space. The evaporated electrode material can then condense on the inner wall of the insulator. This leads to a reduction in the insulation resistance of the insulator. In particular, an electrically conductive bridge can build up between the electrodes via the inner wall and thus impermissibly high leakage currents can occur.

Die Innenwand des Isolators weist einen Vorsprung auf. Durch den Vorsprung soll ein ausreichender Isolationswiderstand des Isolators gewährleistet bleiben. Der Vorsprung ist derart ausgebildet, dass er eine Verunreinigung zumindest eines Teils der Innenwand durch aus dem Entladeraum austretendes, verdampftes Elektrodenmaterial behindert. Durch den Vorsprung soll insbesondere die Ausbildung eines elektrisch leitfähigen Pfades, der die Elektroden galvanisch miteinander verbindet, behindert werden. Der Vorsprung führt beispielsweise auch zur Verlängerung einer wandseitigen Isolationsstrecke zwischen den Elektroden. Die Wandstärke des Isolators wird durch den Vorsprung dabei vorzugsweise nicht verringert, so dass die mechanische Stabilität des Ableiters erhalten bleibt.The inner wall of the insulator has a protrusion. The projection is intended to ensure that the insulator has sufficient insulation resistance. The projection is designed in such a way that it is an impurity at least one Part of the inner wall obstructed by vaporized electrode material escaping from the discharge space. In particular, the projection is intended to prevent the formation of an electrically conductive path that galvanically connects the electrodes to one another. The projection also leads, for example, to an extension of a wall-side insulation gap between the electrodes. The wall thickness of the insulator is preferably not reduced by the projection, so that the mechanical stability of the conductor is maintained.

Beispielsweise erstrecken sich wenigstens eine der Elektroden entlang einer Richtung, insbesondere einer Höhenrichtung, des Ableiters in den Entladeraum hinein, wobei der Vorsprung senkrecht zu dieser Richtung hervorsteht.For example, at least one of the electrodes extends along a direction, in particular a vertical direction, of the conductor into the discharge space, with the projection protruding perpendicular to this direction.

Erfindungsgemäß weist die Innenwand einen ersten Wandbereich und einen zweiten Wandbereich auf. Der erste und der zweite Wandbereich verlaufen beispielsweise parallel zur Höhenrichtung des Ableiters. Beispielsweise wird durch den Vorsprung die Innenwand in die zwei Wandbereiche unterteilt.According to the invention, the inner wall has a first wall area and a second wall area. The first and the second wall area run, for example, parallel to the vertical direction of the conductor. For example, the inner wall is divided into the two wall areas by the projection.

Der erste Wandbereich liegt vom Entladeraum kommend vor dem Vorsprung und der zweite Wandbereich liegt vom Entladeraum kommend hinter dem Vorsprung. Bei Entstehung von verdampftem Elektrodenmaterial im Entladeraum erreicht das verdampfte Elektrodenmaterial somit zuerst den ersten Wandbereich, dann den Vorsprung und dann den zweiten Wandbereich.Coming from the unloading space, the first wall area lies in front of the projection and the second wall area lies behind the projection coming from the unloading space. When vaporized electrode material occurs in the discharge space, the vaporized electrode material thus first reaches the first wall area, then the projection and then the second wall area.

Der Vorsprung bildet dabei insbesondere eine Behinderung für das verdampfte Elektrodenmaterial, so dass nur ein Teil des verdampften Elektrodenmaterials, das bis zum Vorsprung gelangt, auch über den Vorsprung zum zweiten Wandbereich gelangt. Beispielsweise wird durch den Vorsprung ein Weg für das verdampfte Elektrodenmaterial verengt. Insbesondere kann der Vorsprung eine Verengung des Isolationsraums bilden. Vorzugsweise muss das verdampfte Elektrodenmaterial den Vorsprung überwinden, um zum zweiten Wandbereich zu gelangen. In anderen Worten gibt es für das verdampfte Elektrodenmaterial vorzugsweise keinen Weg zum zweiten Wandbereich, der nicht über den Vorsprung führt.In this case, the projection forms in particular an obstacle for the evaporated electrode material, so that only part of the evaporated electrode material that reaches the projection also reaches the second wall region via the projection. For example, the projection becomes a path for the vaporized electrode material narrows. In particular, the projection can form a narrowing of the insulation space. The evaporated electrode material preferably has to overcome the projection in order to reach the second wall area. In other words, there is preferably no path for the vaporized electrode material to the second wall region that does not lead over the projection.

In einer Ausführungsform ist der Vorsprung umlaufend ausgebildet. Bei einem zylinderförmigen Ableiter umläuft der Vorsprung beispielsweise die Innenwand des Isolators auf einer festen Höhe.In one embodiment, the projection is circumferential. In the case of a cylindrical arrester, for example, the projection runs around the inner wall of the insulator at a fixed height.

In einer Ausführungsform ist die Höhe des Vorsprungs geringer als die Höhe der Innenwand des Ableiters. Insbesondere ist die Höhe des Vorsprungs wesentlich geringer als die Höhe der Innenwand. Somit stellt der Vorsprung nur eine lokale Änderung der Geometrie der Innenwand dar. Insbesondere wird durch den Vorsprung nur lokal der Isolationsraum verengt, so dass der Isolationsraum insgesamt nur geringfügig verkleinert wird.In one embodiment, the height of the projection is less than the height of the inner wall of the arrester. In particular, the height of the projection is significantly less than the height of the inner wall. The projection thus represents only a local change in the geometry of the inner wall. In particular, the insulation space is narrowed only locally by the projection, so that the overall insulation space is only slightly reduced.

In einer Ausführungsform ist der Vorsprung gegenüber der halben Höhe der Innenwand versetzt angeordnet. Beispielsweise ist einer der Wandbereiche größer als der andere Wandbereich. Insbesondere kann der erste Wandbereich größer sein als der zweite Wandbereich. Der zweite Wandbereich sollte aber ausreichend groß sein, um die Ausbildung elektrisch leitfähiger Pfade effektiv verhindert zu können.In one embodiment, the projection is offset from half the height of the inner wall. For example, one of the wall areas is larger than the other wall area. In particular, the first wall area can be larger than the second wall area. However, the second wall area should be large enough to be able to effectively prevent the formation of electrically conductive paths.

In einer Ausführungsform ist der Vorsprung bezüglich der Austrittsöffnung derart angeordnet, dass verdampftes Elektrodenmaterial nicht frontal auf den Vorsprung trifft. In diesem Fall könnte die abschirmende Wirkung des Vorsprungs reduziert sein. In einer Ausführungsform ist der Vorsprung in Bezug auf eine Höhenposition einer Austrittsöffnung des Entladeraums versetzt angeordnet.In one embodiment, the projection is arranged in relation to the outlet opening in such a way that evaporated electrode material does not strike the projection frontally. In In this case, the shielding effect of the projection could be reduced. In one embodiment, the projection is offset in relation to a height position of an outlet opening of the unloading space.

Der Vorsprung ist seitlich neben einer der Elektroden angeordnet. Es befindet sich zwischen dem Vorsprung und dieser Elektrode lediglich ein gasgefüllter Zwischenraum. Die Elektrode weist ein innerhalb des Entladeraums angeordnetes Ende und ein dazu entgegen gesetztes Ende auf. Der Vorsprung ist erfindungsgemäß weiter von dem innerhalb des Entladeraums angeordneten Ende der Elektrode entfernt als von dem dazu entgegen gesetzten Ende. Auf diese Weise kann verhindert werden, dass die Bedampfung der Innenwand sich auf einen zu kleinen Bereich vor dem Vorsprung konzentriert.The projection is arranged laterally next to one of the electrodes. There is only a gas-filled space between the projection and this electrode. The electrode has an end located within the discharge space and an end opposite thereto. According to the invention, the projection is further away from the end of the electrode arranged within the discharge space than from the end opposite thereto. In this way, it can be prevented that the evaporation of the inner wall is concentrated on too small an area in front of the projection.

In einer Ausführungsform ist der Vorsprung kantenförmig ausgebildet. Beispielsweise ist die Unterseite des Vorsprungs kantenförmig ausgebildet. Als Unterseite wird dabei die Seite des Vorsprungs bezeichnet, die an den zweiten Wandbereich angrenzt. Beispielsweise schließt die Unterseite mit dem zweiten Wandbereich einen Winkel kleiner als 90° ein. Auf diese Weise wird durch den Vorsprung ein Schattenraum gebildet, in dem die Verunreinigung weiter reduziert ist. Dieser Schattenraum umfasst beispielsweise die Unterkante des Vorsprungs und einen daran angrenzenden Teil des zweiten Wandbereichs.In one embodiment, the projection is formed in the shape of an edge. For example, the underside of the projection is formed in the shape of an edge. The side of the projection that adjoins the second wall area is referred to as the underside. For example, the underside encloses an angle of less than 90° with the second wall area. In this way, a shadow space is formed by the protrusion, in which contamination is further reduced. This shadow space includes, for example, the lower edge of the projection and a part of the second wall area adjoining it.

Im Folgenden werden die hier beschriebenen Gegenstände anhand von schematischen Ausführungsbeispielen näher erläutert.The objects described here are explained in more detail below using schematic exemplary embodiments.

Es zeigen:

Figur 1A
eine Ausführungsform eines Ableiters zum Schutz vor Überspannungen im Schnittbild,
Figur 1B
ein vergrößerter Detail aus der Ausführungsform nach Figur 1A.
Show it:
Figure 1A
an embodiment of an arrester for protection against overvoltages in the sectional view,
Figure 1B
an enlarged detail from the embodiment according to FIG Figure 1A .

Figur 1A zeigt einem Ableiter 1 zum Schutz vor Überspannungen im Schnittbild. Der Ableiter 1 weist beispielsweise eine zylindrische Bauform auf. Figure 1A shows a sectional view of an arrester 1 for protection against overvoltages. The arrester 1 has, for example, a cylindrical design.

Der Ableiter 1 weist eine erste Elektrode 2 und eine zweite Elektrode 3 auf. Die Elektroden 2, 3 weisen jeweils ein elektrisch leitfähiges Material auf. Beispielsweise weisen die Elektroden 2, 3 Kupfer auf. Die erste Elektrode 2 ragt stiftförmig ins Innere des Ableiters 1 hinein. Die zweite Elektrode 3 ragt beispielsweise in Form eines Hohlzylinders ins Innere des Ableiters 1 hinein und umgibt die erste Elektrode 2 teilweise.The conductor 1 has a first electrode 2 and a second electrode 3 . The electrodes 2, 3 each have an electrically conductive material. For example, the electrodes 2, 3 have copper. The first electrode 2 projects into the interior of the arrester 1 in the form of a pin. The second electrode 3 protrudes, for example in the form of a hollow cylinder, into the interior of the arrester 1 and partially surrounds the first electrode 2 .

Der Ableiter 1 weist einen Isolator 4 auf. Der Isolator 4 weist ein isolierendes Material, beispielsweise Keramik oder Glas auf. Der Isolator 4 bildet beispielsweise die Mantelfläche des Ableiters 1. Der Isolator 4 bildet eine Innenwand 5 des Ableiters 1.The conductor 1 has an insulator 4 . The insulator 4 has an insulating material such as ceramic or glass. The insulator 4 forms, for example, the lateral surface of the arrester 1. The insulator 4 forms an inner wall 5 of the arrester 1.

Der Ableiter 1 weist zudem eine erste Kontaktelektrode 6, die mit der ersten Elektrode 2 elektrisch leitend verbunden ist, und eine zweite Kontaktelektrode 7, die mit der zweiten Elektrode 3 elektrisch leitend verbunden ist, auf. Die Kontaktelektroden 6, 7 bilden beispielsweise die Deck- und Bodenflächen des Ableiters 1.The conductor 1 also has a first contact electrode 6, which is electrically conductively connected to the first electrode 2, and a second contact electrode 7, which is electrically conductively connected to the second electrode 3. The contact electrodes 6, 7 form, for example, the top and bottom surfaces of the conductor 1.

Der Ableiter 1 ist beispielsweise hermetisch nach außen abgeschlossen. Der Ableiter 1 kann mit einem Gas, insbesondere einem Edelgas, gefüllt sein.The diverter 1 is, for example, hermetically sealed to the outside. The conductor 1 can be filled with a gas, in particular an inert gas.

Der Ableiter 1 weist einen Entladeraum 8 auf, in dem bei Überschreitung einer Aktivierungsspannung eine Entladung 9, insbesondere eine Lichtbogenentladung, zwischen den Elektroden 2, 3 auftritt. Der Entladeraum 8 ist zwischen den Elektroden 2, 3 ausgebildet, insbesondere in einem Bereich, in dem der Abstand der Elektroden 2, 3 am geringsten ist.The arrester 1 has a discharge chamber 8 in which a discharge 9, in particular an arc discharge, occurs between the electrodes 2, 3 when an activation voltage is exceeded. The discharge space 8 is formed between the electrodes 2, 3, in particular in an area in which the distance between the electrodes 2, 3 is the smallest.

Die Elektroden 2, 3 sind von der Innenwand 5 beabstandet. Die zweite Elektrode 3 befindet sich näher an der Innenwand 5 als die erste Elektrode 2. Zwischen der Innenwand 5 und den Elektroden 2, 3 befindet sich ein Isolationsraum 10. Der Isolationsraum 10 ist beispielsweise gasgefüllt.The electrodes 2, 3 are spaced from the inner wall 5. FIG. The second electrode 3 is closer to the inner wall 5 than the first electrode 2. There is an insulating space 10 between the inner wall 5 and the electrodes 2, 3. The insulating space 10 is filled with gas, for example.

Insbesondere bei wiederholten Stoßstrombelastungen kann bei einer Entladung 9 Elektrodenmaterial von den Elektroden 2, 3 verdampfen. Beispielsweise handelt es sich um Kupferpartikel. Das verdampfte Elektrodenmaterial 11 führt beispielsweise zu einer Verunreinigung des ionisierten Gases. Das verdampfte Elektrodenmaterial 11 kann aus dem Entladeraum 8 durch eine Austrittsöffnung 12 austreten und zum Isolationsraum 10 vordringen. Dabei kann eine Bedampfung der Innenwand 5 des Isolators 4 mit Elektrodenmaterial 11 auftreten. Dies kann zu einer Reduzierung des Isolationswiderstandes der Innenwand 5 und damit zu einer Funktionsverschlechterung führen. Insbesondere kann die Bedampfung zur Ausbildung einer elektrisch leitenden Brücke zwischen den Elektroden 2, 3 über die Innenwand 5 führen. Beispielsweise kann es dabei zu unzulässig hohen Leckströmen bei Betrieb an Nennwechselspannung kommen.Electrode material can evaporate from the electrodes 2, 3 in the event of a discharge 9, in particular in the case of repeated surge current loads. For example, it is copper particles. The vaporized electrode material 11 leads, for example, to contamination of the ionized gas. The vaporized electrode material 11 can exit the discharge space 8 through an exit opening 12 and penetrate to the insulation space 10 . In this case, the inner wall 5 of the insulator 4 can be vaporized with electrode material 11 . This can lead to a reduction in the insulation resistance of the inner wall 5 and thus to a deterioration in functionality. In particular, the vapor deposition can lead to the formation of an electrically conductive bridge between the electrodes 2 , 3 via the inner wall 5 . For example, this can result in impermissibly high leakage currents when operating at nominal AC voltage.

Zur Erhaltung eines ausreichenden Isolationswiderstandes weist die Innenwand 5 einen Vorsprung 13 auf. Der Vorsprung 13 ist Teil des Isolators 4 und somit aus isolierendem Material. Der Vorsprung 13 ist beispielsweise umlaufend entlang der Innenwand 5 ausgebildet. Beispielsweise ist der Vorsprung 13 ringförmig. Der Vorsprung 13 ragt in den Isolationsraum 10 hinein. Beispielsweise befindet sich der Vorsprung 13 im Isolationsraum 10 zwischen dem Isolator 4 und der zweiten Elektrode 3.The inner wall 5 has a projection 13 to maintain a sufficient insulation resistance. The projection 13 is part of the insulator 4 and is therefore made of insulating material. The projection 13 is formed, for example, circumferentially along the inner wall 5 . For example, the projection 13 is ring-shaped. The projection 13 projects into the insulation space 10 . For example, the projection 13 is located in the insulating space 10 between the insulator 4 and the second electrode 3.

Die Höhe h des Vorsprungs 13, d.h., die Erstreckung des Vorsprungs 13 in Richtung von einer Kontaktelektrode 6 zur gegenüberliegenden Kontaktelektrode 7, ist wesentlich geringer als die gesamte Höhe H der Innenwand 5. Somit wird das Gasvolumen im Isolationsraum 10 durch den Vorsprung 13 nur geringfügig reduziert. Beispielsweise ist die Höhe h des Vorsprungs 13 kleiner gleich ein Viertel der Höhe H der Innenwand 5.The height h of the projection 13, i.e. the extension of the projection 13 in the direction from one contact electrode 6 to the opposite contact electrode 7, is significantly less than the total height H of the inner wall 5. Thus, the gas volume in the insulating space 10 is only slightly reduced by the projection 13. For example, the height h of the projection 13 is less than or equal to a quarter of the height H of the inner wall 5.

Der Vorsprung 13 ist in Bezug auf die halbe Höhe der Innenwand 5 versetzt angeordnet. Somit ist der Vorsprung 13 nicht mittig an der Innenwand 5 angeordnet. Weiterhin ist der Vorsprung 13 nicht auf Höhe der Austrittsöffnung 12 angeordnet.The projection 13 is offset in relation to half the height of the inner wall 5 . The projection 13 is therefore not arranged centrally on the inner wall 5 . Furthermore, the projection 13 is not arranged at the level of the outlet opening 12 .

Der Vorsprung 13 unterteilt den Isolationsraum 10 in einen ersten Raumbereich 14 und einen zweiten Raumbereich 15. Der erste Raumbereich 14 wird von dem aus dem Entladeraum 8 austretenden, verdampften Elektrodenmaterial 11 zuerst erreicht. Der zweite Raumbereich 15 befindet sich vom Entladeraum 8 kommend hinter dem ersten Raumbereich 14 und hinter dem Vorsprung 13. Der zweite Raumbereich 15 ist beispielsweise wesentlich kleiner als der erste Raumbereich 14.The projection 13 divides the insulating space 10 into a first spatial area 14 and a second spatial area 15. The vaporized electrode material 11 emerging from the discharge space 8 reaches the first spatial area 14 first. Coming from the unloading space 8, the second spatial area 15 is located behind the first spatial area 14 and behind the projection 13. The second spatial area 15 is for example significantly smaller than the first spatial area 14.

Der Vorsprung 13 bildet eine lokale Verengung des Isolationsraums 10. Dadurch wird das Vordringen des verdampften Elektrodenmaterials 11 in den zweiten Raumbereich 15 durch den Vorsprung 13 behindert, so dass nur eine reduzierte Menge des verdampften Elektrodenmaterials 11 in den zweiten Raumbereich 15 gelangt. Das Vordringen des verdampften Elektrodenmaterials 11 in den ersten Raumbereich 14 wird nicht behindert.The projection 13 forms a local constriction of the insulation space 10 . This prevents the vaporized electrode material 11 from penetrating into the second space 15 through the projection 13 , so that only a reduced amount of the vaporized electrode material 11 gets into the second space 15 . The advance of the evaporated electrode material 11 into the first space 14 is not impeded.

Ebenso unterteilt der Vorsprung 13 die Innenwand 5 in einen ersten Wandbereich 16 und in einen zweiten Wandbereich 17. Der zweite Wandbereich 17 liegt vom Entladeraum 8 kommend hinter dem Vorsprung 13 und wird somit vom Vorsprung 13 abgeschattet. Damit wird die Bedampfung des zweiten Wandbereichs 17 behindert, so dass ein ausreichender Isolationswiderstand erhalten bleibt. Die Bedampfung des ersten Wandbereichs 16 wird nicht behindert. Die Bedampfung des ersten Wandbereichs 16 kann durch den Vorsprung 13 sogar etwas verstärkt sein. Der erste Wandbereich 16 und der zweite Wandbereich 17 sind parallel zur Höhenrichtung des Ableiters 1 angeordnet. Der zweite Wandbereich 17 ist wesentlich kleiner als der erste Wandbereich 16.Likewise, the projection 13 divides the inner wall 5 into a first wall area 16 and a second wall area 17. Coming from the unloading space 8, the second wall area 17 lies behind the projection 13 and is thus shaded by the projection 13. This prevents the vapor deposition of the second wall area 17, so that a sufficient insulation resistance is maintained. The vapor deposition of the first wall area 16 is not impeded. The vaporization of the first wall area 16 can even be increased somewhat by the projection 13 . The first wall area 16 and the second wall area 17 are arranged parallel to the vertical direction of the conductor 1 . The second wall area 17 is significantly smaller than the first wall area 16.

Zusätzlich zur Verringerung der Bedampfung der des zweiten Wandbereichs 17 wird durch den Vorsprung 13 die wandseitige Isolationsstrecke zwischen den Elektroden 2, 3 verlängert. Die Wandstärke des Isolators 4 wird durch den Vorsprung 13 dabei nicht reduziert, so dass die Stabilität des Isolators 4 gegen mechanische Belastung während des Stromimpulses erhalten bleibt.In addition to reducing the vaporization of the second wall area 17, the projection 13 lengthens the insulation distance between the electrodes 2, 3 on the wall side. The wall thickness of the insulator 4 is not reduced by the projection 13, so that the stability of the insulator 4 against mechanical stress during the current pulse is maintained.

Der Vorsprung 13 ist seitlich neben der zweiten Elektrode 3 angeordnet. Der Vorsprung 13 ist weiter von dem innerhalb des Entladeraums 8 angeordneten Ende der zweiten Elektrode 3 entfernt als von dem dazu entgegen gesetzten Ende, das an die zweite Kontaktelektrode 7 angrenzt. Beispielsweise ist der Abstand des Vorsprungs 13 zu dem innerhalb des Entladeraums 8 angeordneten Ende der zweiten Elektrode 3 wenigstens doppelt so groß wie der Abstand zu dem an die zweite Kontaktelektrode 7 grenzenden Ende. Der Abstand ist beispielsweise als Höhenunterschied zwischen einer Mittelebene durch den Vorsprung 13 und dem jeweiligen Ende der Elektrode 3 definiert. Durch eine derartige Positionierung des Vorsprungs 13 kann verhindert werden, dass die Bedampfung der Innenwand sich auf einen zu kleinen Bereich vor dem Vorsprung konzentriert.The projection 13 is arranged laterally next to the second electrode 3 . The projection 13 is further away from the end of the second electrode 3 arranged within the discharge space 8 than from the end opposite thereto, which adjoins the second contact electrode 7 . For example, the distance from the projection 13 to the end of the second electrode 3 arranged within the discharge space 8 is at least twice as large as the distance to the end adjoining the second contact electrode 7 . The distance is defined, for example, as a difference in height between a center plane through the projection 13 and the respective end of the electrode 3 . Positioning the projection 13 in this way can prevent the evaporation of the inner wall from being concentrated on too small an area in front of the projection.

Figur 1B zeigt eine vergrößerte Detailansicht eines Bereichs des Ableiters 1. Der gezeigte Bereich ist in Figur 1A durch einen Kreis markiert. Figure 1B shows an enlarged detailed view of an area of arrester 1. The area shown is in Figure 1A marked by a circle.

Der Vorsprung 13 ist kantenförmig ausgebildet. Insbesondere weist der Vorsprung 13 an seiner Unterseite 18 eine Kante 19 auf. Die Unterseite 18 des Vorsprungs 13 schließt dabei mit dem zweiten Wandbereich 17 beispielsweise einen spitzen Winkel α ein, d.h. einen Winkel kleiner als 90°. Beispielsweise ist der Winkel α kleiner als 80°. Beispielsweise ist der Winkel α kleiner als 80° und größer als 30°. Der Winkel α kann auch kleiner oder gleich 90° sein.The projection 13 is edge-shaped. In particular, the projection 13 has an edge 19 on its underside 18 . The underside 18 of the projection 13 encloses an acute angle α with the second wall area 17, for example, i.e. an angle of less than 90°. For example, the angle α is less than 80°. For example, the angle α is less than 80° and greater than 30°. The angle α can also be less than or equal to 90°.

Eine Oberseite des Vorsprungs 13 ist beispielsweise entsprechend zur Unterseite 18 ausgebildet sein und kann insbesondere mit dem ersten Wandbereich 16 einen spitzen Winkel einschließen. Die Geometrie des Vorsprungs 13 kann auch als stufenförmig bezeichnet werden. Dabei bildet der Vorsprung 13 in Bezug auf den ersten Wandbereich 16 eine erste Stufe aus und in Bezug auf den zweiten Wandbereich 17 eine zweite Stufe aus.An upper side of the projection 13 is designed, for example, to correspond to the lower side 18 and can in particular have a point with the first wall area 16 include angles. The geometry of the projection 13 can also be described as stepped. The projection 13 forms a first step in relation to the first wall area 16 and a second step in relation to the second wall area 17 .

Durch die kantenförmige Geometrie des Vorsprungs 13 wird beispielsweise ein Schattenraum 20 hinter dem Vorsprung 13 gebildet. Im Schattenraum 20 ist die Bedampfung noch einmal zusätzlich reduziert. Insbesondere liegt die Unterseite 18 des Vorsprungs 13 und ein daran angrenzender Teil des zweiten Wandbereichs im Schattenraum 20.Due to the edge-shaped geometry of the projection 13, a shadow space 20 is formed behind the projection 13, for example. In the shadow room 20, the steaming is additionally reduced. In particular, the underside 18 of the projection 13 and an adjoining part of the second wall area are in the shadow space 20.

Die Beschreibung der hier angegebenen Gegenstände ist nicht auf die einzelnen speziellen Ausführungsformen beschränkt.The description of the objects given here is not limited to each specific embodiment.

BezugszeichenlisteReference List

11
Ableiterarrester
22
erste Elektrodefirst electrode
33
zweite Elektrodesecond electrode
44
Isolatorinsulator
55
Innenwandinner wall
66
erste Kontaktelektrodefirst contact electrode
77
zweite Kontaktelektrodesecond contact electrode
88th
Entladeraumunloading room
99
Entladungdischarge
1010
Isolationsraumisolation room
1111
verdampftes Elektrodenmaterialevaporated electrode material
1212
Austrittsöffnungexit port
1313
Vorsprunghead Start
1414
erster Raumbereichfirst room area
1515
zweiter Raumbereichsecond room area
1616
erster Wandbereichfirst wall area
1717
zweiter Wandbereichsecond wall area
1818
Unterseitebottom
1919
Kanteedge
2020
Schattenraumshadow space
hH
Höhe des Vorsprungsheight of the projection
HH
Höhe der Innenwandinner wall height
αa
eingeschlossener Winkelincluded angle

Claims (10)

  1. Arrester for surge protection,
    comprising a first electrode (2) and a second electrode (3), a discharge chamber (8) for enabling an electrical discharge (9) between the electrodes (2, 3) in the event of an overvoltage, wherein the first electrode (2) is configured in a pin-shaped fashion and the second electrode (3) is configured in the form of a hollow cylinder, wherein the first electrode (2) extends into a hollow space of the second electrode (3), and an insulator (4), which forms an inner wall (5) of the arrester (1), wherein the insulator (4) is configured in the form of a hollow cylinder, wherein the hollow cylinder defined by the second electrode (3) is arranged concentrically within the hollow cylinder defined by the insulator (4), wherein a gas-filled insulation space (10) is situated between the inner wall (5) and the electrodes (2, 3), wherein the inner wall (5) has a projection (13) in the region of the gas-filled insulation space,
    wherein the projection (13) is arranged in such a way that it faces a side surface of the second electrode (3), wherein the second electrode (3) has a first end arranged in the discharge chamber and has a second end arranged opposite to the first end, wherein the projection (13) is further away from the end arranged within the discharge chamber by comparison with the end opposite thereto,
    wherein the inner wall (5) has a first wall region (16) and a second wall region (17), wherein the first wall region (16) is situated before the projection (13), coming from the discharge chamber (8), and the second wall region (17) is situated behind the projection (13), coming from the discharge chamber (8).
  2. Arrester according to Claim 1,
    wherein the projection (13) is configured for obstructing a contamination of at least one part of the inner wall (5) by evaporated electrode material (11) emerging from the discharge chamber (8).
  3. Arrester according to either of the preceding claims,
    wherein the projection (13) is configured in a circumferentially extending fashion.
  4. Arrester according to any of the preceding claims, wherein the height (h) of the projection (13) is less than the height (H) of the inner wall (5).
  5. Arrester according to any of the preceding claims, wherein the projection (13) is arranged in a manner offset with respect to half the height of the inner wall (6).
  6. Arrester according to any of the preceding claims, wherein the discharge chamber (8) has an exit opening (12), from which evaporated electrode material (11) can emerge from the discharge chamber (8), wherein the projection (13) is arranged in a manner offset with respect to a height position of the exit opening (12).
  7. Arrester according to any of the preceding claims, wherein the projection (13) is configured in an edge-shaped fashion.
  8. Arrester according to any of the preceding claims, wherein the inner wall (5) is subdivided by the projection (13) into a first wall region (16) and a second wall region (17), wherein the projection (13) has an underside (18) adjoining the second wall region (17), wherein the underside (18) forms with the second wall region (17) an angle (α) of less than 90°.
  9. Arrester according to any of the preceding claims, wherein at least one of the electrodes (2, 3) extends along a height direction of the arrester (1) into the discharge chamber (8), wherein the projection (13) protrudes perpendicularly to the height direction of the arrester (1).
  10. Arrester according to any of the preceding claims, wherein the distance between the projection (13) and the end of the electrode (2, 3) that is arranged within the discharge chamber (8) has a magnitude at least double as that of the distance between the projection (13) and the opposite end of the electrode (2, 3).
EP17701496.6A 2016-02-01 2017-01-25 Arrester for surge protection Active EP3411932B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016101728.0A DE102016101728A1 (en) 2016-02-01 2016-02-01 Arrester for protection against overvoltages
PCT/EP2017/051562 WO2017133951A1 (en) 2016-02-01 2017-01-25 Arrester for surge protection

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EP3411932A1 EP3411932A1 (en) 2018-12-12
EP3411932B1 true EP3411932B1 (en) 2023-07-26

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US (1) US10910795B2 (en)
EP (1) EP3411932B1 (en)
JP (1) JP2019508844A (en)
CN (1) CN108604776A (en)
DE (1) DE102016101728A1 (en)
WO (1) WO2017133951A1 (en)

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Publication number Priority date Publication date Assignee Title
JP6769086B2 (en) * 2016-04-26 2020-10-14 三菱マテリアル株式会社 Surge protection element

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US4241374A (en) * 1979-01-29 1980-12-23 Reliable Electric Company Surge voltage arrester with ventsafe feature
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JPS6055091U (en) * 1983-09-22 1985-04-17 株式会社サンコ−シャ discharge type lightning arrester
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US10910795B2 (en) 2021-02-02
EP3411932A1 (en) 2018-12-12
CN108604776A (en) 2018-09-28
JP2019508844A (en) 2019-03-28
DE102016101728A1 (en) 2017-08-03
US20190052064A1 (en) 2019-02-14
WO2017133951A1 (en) 2017-08-10

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