EP2669903B1 - Enclosed surge absorber with central feedthrough - Google Patents

Enclosed surge absorber with central feedthrough Download PDF

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Publication number
EP2669903B1
EP2669903B1 EP12170022.3A EP12170022A EP2669903B1 EP 2669903 B1 EP2669903 B1 EP 2669903B1 EP 12170022 A EP12170022 A EP 12170022A EP 2669903 B1 EP2669903 B1 EP 2669903B1
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EP
European Patent Office
Prior art keywords
housing
surge arrester
end fitting
earth
housing cover
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
EP12170022.3A
Other languages
German (de)
French (fr)
Other versions
EP2669903A1 (en
Inventor
Markus Sulitze
Gundolf Barenthin
Ingo Gottschalk
Erhard Pippert
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Siemens AG
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Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP12170022.3A priority Critical patent/EP2669903B1/en
Priority to PCT/EP2013/058612 priority patent/WO2013178411A1/en
Priority to KR1020147033168A priority patent/KR101674785B1/en
Priority to CN201380028701.XA priority patent/CN104350553B/en
Priority to JP2015514395A priority patent/JP6113274B2/en
Publication of EP2669903A1 publication Critical patent/EP2669903A1/en
Application granted granted Critical
Publication of EP2669903B1 publication Critical patent/EP2669903B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • 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
    • H01C7/123—Arrangements for improving potential distribution
    • 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
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure

Definitions

  • surge arresters are protective systems, for example, for switchgear, which in case of overvoltages caused by lightning or malfunction of other subsystems derive these surges to ground out and protect other components of the switchgear.
  • a surge arrester comprises one or more cylindrical diverting elements, which have a varistor column made up of individual, likewise cylindrical varistor elements.
  • Varistor elements are characterized by a voltage-dependent resistance. At low voltages these act as insulators. From a certain threshold voltage, which is material-dependent, they show a good conductivity.
  • varistor elements are made of metal oxides such as zinc oxide. The diverter is limited at both ends by end fittings that make electrical contact with the switchgear and ground.
  • the varistor column must be held together under pressure. This can be done by tension members, for example, ropes or rods are preferably clamped in glass fiber reinforced plastic in the end fittings under train.
  • the tension elements surround the varistor column and thus form a cage around them.
  • For use in gas-insulated switchgear surge arresters have a fluid-tight housing, which surrounds one or more diverting elements.
  • the housing is filled to increase the dielectric strength with a fluid, usually sulfur hexafluoride.
  • the housing is usually made of metal and is electrically grounded. An end fitting of the discharge element is grounded via a contact made through the housing.
  • the other end fitting is electrically connected via a high voltage feedthrough with a located on the outside of the housing contact, which serves to connect to the switchgear.
  • larger surge arresters often have at their high voltage end of a control hood, which is slipped over the end of the varistor column as a cylinder closed on one side.
  • the varistor column is electrically connected to the end fittings and the earth-side end fitting to the housing cover, so that an electrical connection of the varistor column with the housing. About the grounding of the housing then the connection of the varistor column is made to earth. If occurring discharge processes are to be registered, the varistor column must be connected to a monitoring device arranged outside the fluid-tight housing.
  • a surge arrester has a discharge column arranged in a housing.
  • the delivery column comprises a discharge element, Tensile elements and a ground-side and a high-voltage side end fitting.
  • the discharge element is clamped between the end fittings by means of the tension elements.
  • the surge arrester has an electrical leadthrough with a current path insulated from the housing from the interior of the housing to the exterior of the housing.
  • a longitudinal axis of the feedthrough is arranged coaxially with a longitudinal axis of the diverting element and the diverting element is electrically connected to the feedthrough via connecting means.
  • the connecting means form an electrical connection between the discharge element and the feedthrough, which is electrically insulated from the earth-side end fitting and which is guided through a passage opening in the earth-side end fitting.
  • the housing is formed fluid-tight and filled with an insulating gas.
  • an insulating gas In particular, if sulfur hexafluoride is used as the insulating gas, it is possible to construct very compact surge arresters by virtue of the fact that insulating distances are less than air.
  • the housing has a housing cover, on which the earth-side end fitting is arranged. The implementation leads through the housing cover. As a result, the feed-through and delivery columns can be easily mounted and assembled outside the housing.
  • the housing cover has a pressure compensation device for equalizing an overpressure in the interior of the housing.
  • the housing cover has a closable access opening.
  • An inspection opening allows easy opening of the housing for maintenance purposes.
  • the housing cover has a filling and discharge device for insulating gas.
  • the filling and discharge device With the filling and discharge device, the housing without being opened can be filled with insulating gas or the insulating gas can be removed from the housing for maintenance purposes. This ensures that no insulating gas can escape into the atmosphere.
  • the housing By accommodating pressure compensation devices and / or inspection openings and / or filling and discharge devices in the housing cover, the housing can be constructed more easily.
  • the earth contact has a flat bearing surface, on which the discharge element is supported, and a receptacle for the resilient element.
  • the discharge element is spaced by an electrically insulating spacer element of the earth-side end fitting.
  • the diverter is thereby electrically isolated from the end fitting. This advantageously prevents electrical flashovers between the discharge element and the end fitting.
  • the spacer element is tubular and arranged the resilient element at least partially within the spacer element. This makes a particularly compact design possible. So that insulating gas can penetrate into the tube interior of the spacer element, the spacer element may have openings in the tube wall.
  • the recording of the earth contact is designed as an annular projection for guiding the spacer element and / or the resilient element.
  • the spacer element and / or the resilient element By guiding spacer and / or resilient element assembly is facilitated.
  • the earth-side end fitting is formed by the housing cover.
  • the tension elements of the Ableit yarn are anchored on the ground side directly in the housing cover and thus fix the discharge on the housing cover.
  • the housing cover thus forms the earth-side end fitting, which is particularly material-efficient.
  • FIG. 1 the finished mounted earth-side end of a surge arrester 1 according to the invention is shown without housing.
  • a diverting element 2 is constructed from a plurality of columnar varistor elements and is clamped between two end fittings 5, one on the earth side and one on the high side, of which only the earth side is shown here, by means of tension elements 7, of which only one is shown here.
  • the tension elements 7 are arranged parallel to the longitudinal axis 30 of the diverting element 2 and surround this in the radial direction. By the longitudinal axis 30 of the diverter 2 an axial direction is defined.
  • the tension elements 7 are often made of fiberglass reinforced plastic and with mounting sockets 8, which are crimped onto the tension elements 7, pressed or glued, anchored in the end fittings 5.
  • the tension elements 7 are fastened in an end fitting 5 in a similar manner.
  • a disk-shaped earth contact 3 is arranged at the earth-side end face of the discharge element 2.
  • the spacer element 17 immersed in the axial direction in a circular opening 23 in the end fitting 5 and is supported on a radial projection 24 in this opening 23 from.
  • the spacer 17 is made of a shape and temperature-resistant electrically insulating material and in particular has a high bending strength.
  • the spacer element 17 is made of an electrically insulating material
  • the discharge element 2 is electrically insulated from the earth-side end fitting 5.
  • the ground contact 3 has on its the discharge element 2 facing away End face on an annular projection 21. This has an outer diameter which corresponds to the inner diameter of the spacer element 17, so that the radially outer side of the projection 21 serves as a guide for the spacer element 17.
  • the active part 18 mentioned block of diverter 2, end fittings 5, tension elements 7 with mounting sockets 8, and the spacer 17 can be easily pre-assembled.
  • FIG. 3 shows the earth-side end of such an active part 18, but only one of several tension elements 7 is shown.
  • FIG. 1 further shows the ground-side housing wall of the housing, which is formed by a housing cover 4.
  • a passage 10 is passed through an opening in the housing cover 4.
  • the bushing 10 has an insulating tube 13, an outer insulating bushing 12, an inner insulating bushing 14 and a bushing conductor 11.
  • the insulating tube 13 is first inserted into the opening of the housing cover 4.
  • the insulating tube 13 protrudes on both sides out of the opening.
  • the inner insulating bush 14 is now placed on the inside of the housing cover 4. This is likewise tubular and has an inner diameter which corresponds to the outer diameter of the insulating tube 13.
  • the insulating bush 14 stands in the axial direction over the housing-internal end of the insulating tube 13 via. Insulating tube 13 and inner insulating bushing 14 are arranged coaxially to the longitudinal axis 30.
  • an outer insulating sleeve 12 is placed on the housing outer side end of the insulating tube 13.
  • the outer insulating bush 12 in this case has an annular recess 29 which receives the housing outer side end of the insulating tube 13.
  • An annular projection 28 of the outer insulating sleeve 12 protrudes on the radial inner side of the insulating tube 13 in the axial direction into this.
  • the housing inside End of the feedthrough conductor 11 stands over the inner insulating bushing 14 and protrudes into the housing.
  • a stop, for example a nut, on the housing outer side end of the feedthrough conductor 11 limits its penetration depth.
  • a washer 15 is placed, which rests on the inner insulating bushing 14 and is then fixed with a nut 16.
  • the outer insulating sleeve 12 has at its end faces seals 22, such as O-rings, on which seal the outer insulating sleeve 12 against the housing, here against the housing cover 4, and against the feedthrough 11.
  • the bushing 10 thus constitutes a gas-tight electrical connection from the inside of the housing to the outside of the housing, which is electrically insulated from the housing.
  • FIG. 2 shows a housing cover 4 with such a fully assembled passage 10th
  • FIG. 1 the housing cover 4 with implementation 10 and active part 18 in the assembled state.
  • the end fitting 5 is fixed to the housing cover 4 by means of screws 6.
  • the inner insulating bushing 14 with the housing-internal end of the bushing conductor 11 projects at least partially into the spacer element 17.
  • a resilient element 9 here a coil spring, which is arranged in the interior of the spacer element 17 between earth contact 3 and washer 15, an electrical connection between the ground contact 3 and the bushing 10 is made.
  • Ground contact 3 and spring-elastic element 9 thus constitute connection means which electrically connect the discharge element 2 to the feedthrough 10.
  • the radial inner side of the projection 21 of the earth contact 3 provides a receptacle for the resilient element 9, which is guided and centered by this recording.
  • openings 20 are provided in the wall of the spacer element 17.
  • An electrical current path now leads from the diverter 2 via the ground contact 3, the resilient element 9, washer 15, nut 16 and feedthrough 11 on the outside of the housing. This Current path leads electrically against the end fitting 5 and housing insulated by the end fitting 5 and through the housing wall, here the housing cover 4, through.
  • a surge arrester 1 can also have a plurality of active parts 18 in a housing. Each active part 18 is then assigned its own feedthrough 10, which is arranged coaxially with the diverting element 2 of the respective active part 18.
  • FIG. 4 shows further embodiments of the invention.
  • the earth-side end fitting is formed by the housing cover 4.
  • the tension elements 7 are fastened by means of the mounting bushes 8 directly to the housing cover 4, which thus forms the earth-side end fitting.
  • the housing cover 4 closes off the housing 19 on an end face. Seals 32 ensure gas tightness.
  • Each active part 18 is assigned its own implementation 10.
  • the two active parts 18 have a common earth-side end fitting, which is provided here by the housing cover 4.
  • the housing cover 4 also has a pressure compensation device 25.
  • a rupture disk 26 covers an annular opening in the housing cover 4.
  • the rupture disk 26 is fixed on the inside of the housing with an annular flange 31. Seals 33 seal the rupture disk 26 against the housing cover 4 gas-tight. If an overpressure arises in the housing 19, the rupture disk 26 bursts and releases the excess pressure to the outside, thus preventing damage to the housing 19.
  • a Ausblasschute 27 on the outside of the opening deflects the outflowing gases in a desired direction.
  • the housing cover 4 may have a filling and discharge device for insulating gas and / or a revision opening.
  • the filling and discharge device for insulating gas serves to insulating gas, For example, sulfur hexafluoride to be filled in the housing 19 or to drain from the housing.
  • the filling and discharge device is designed so that no insulating gas can escape uncontrollably.
  • the inspection opening serves, for example, for assembly, maintenance or inspection purposes, to get to elements inside the housing 19 without having to disassemble them.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Thermistors And Varistors (AREA)
  • Emergency Protection Circuit Devices (AREA)

Description

Die Erfindung betrifft einen gekapselten Überspannungsableiter gemäß Patentanspruch 1 Überspannungsableiter sind Schutzsysteme beispielsweise für Schaltanlagen, die bei auftretenden Überspannungen durch Blitzeinschlag oder Fehlfunktionen anderer Teilsysteme diese Überspannungen zur Masse hin ableiten und so andere Bauteile der Schaltanlage schützen.
Ein derartiger Überspannungsableiter umfasst ein oder mehrere zylindrische Ableitelemente, die eine aus einzelnen ebenfalls zylindrischen Varistorelementen aufgebaute Varistorsäule aufweisen. Varistorelemente zeichnen sich durch einen spannungsabhängigen Widerstand aus. Bei niedrigen Spannungen wirken diese als Isolatoren. Ab einer bestimmten Schwellenspannung, die materialabhängig ist, zeigen sie eine gute Leitfähigkeit. Häufig werden Varistorelemente aus Metalloxiden wie Zinkoxid hergestellt. Das Ableitelement wird an beiden Enden von Endarmaturen begrenzt, die den elektrischen Kontakt zur Schaltanlage und zur Masse herstellen. Um einen guten elektrischen Kontakt auch unter mechanischer Belastung zu gewährleisten, muss die Varistorsäule unter Druck zusammengehalten werden. Dies kann erfolgen, indem Zugelemente beispielsweise Seile oder Stäbe vorzugsweise aus glasfaserverstärktem Kunststoff in den Endarmaturen unter Zug eingespannt werden. Die Zugelemente umgeben dabei die Varistorsäule und bilden so einen Käfig um diese.
Für den Einsatz in gasisolierten Schaltanlagen weisen Überspannungsableiter ein fluiddichtes Gehäuse auf, das ein oder mehrere Ableitelemente umgibt. Das Gehäuse ist dabei zur Erhöhung der Durchschlagfestigkeit mit einem Fluid, meist Schwefelhexafluorid gefüllt. Das Gehäuse besteht meist aus Metall und ist elektrisch geerdet. Eine Endarmatur des Ableitelementes ist über einen durch das Gehäuse geführten Kontakt geerdet. Die andere Endarmatur ist über eine Hochspannungsdurchführung mit einem an der Außenseite des Gehäuses befindlichen Kontakt elektrisch verbunden, der dem Anschluss an die Schaltanlage dient. Insbesondere größere Überspannungsableiter besitzen häufig an ihrem hochspannungsseitigen Ende eine Steuerhaube, die als einseitig verschlossener Zylinder über das Ende der Varistorsäule gestülpt ist. Im einfachsten Fall ist die Varistorsäule mit den Endarmaturen und die erdseitige Endarmatur mit dem Gehäusedeckel elektrisch verbunden, so dass eine elektrische Verbindung von der Varistorsäule mit dem Gehäuse besteht. Über die Erdung des Gehäuses wird dann die Verbindung der Varistorsäule zur Erde hergestellt. Sollen auftretende Ableitvorgänge registriert werden, muss die Varistorsäule an eine außerhalb des fluiddichten Gehäuses angeordnete Überwachungseinrichtung angeschlossen werden. Dazu wird ein vom Gehäuse getrennter Erdungspfad der Varistorsäule benötigt. Um diesen bereitzustellen, muss eine elektrische Verbindung elektrisch isoliert vom Gehäuse von der Varistorsäule zu einem außerhalb des Gehäuses liegenden Kontakt geführt werden.
Aus der älteren deutschen Anmeldung der Anmelderin mit dem Aktenzeichen 10 2011 077 394.0 ist ein gattungsgemäßer Überspannungsableiter bekannt mit einer Durchführung im erdseitigen Gehäusedeckel, zwischen dem Ableitelement und der Gehäusewand. Die elektrische Verbindung zwischen der Varistorsäule und der Durchführung wird über ein Kabel hergestellt.The invention relates to an encapsulated surge arrester according to claim 1 surge arresters are protective systems, for example, for switchgear, which in case of overvoltages caused by lightning or malfunction of other subsystems derive these surges to ground out and protect other components of the switchgear.
Such a surge arrester comprises one or more cylindrical diverting elements, which have a varistor column made up of individual, likewise cylindrical varistor elements. Varistor elements are characterized by a voltage-dependent resistance. At low voltages these act as insulators. From a certain threshold voltage, which is material-dependent, they show a good conductivity. Frequently, varistor elements are made of metal oxides such as zinc oxide. The diverter is limited at both ends by end fittings that make electrical contact with the switchgear and ground. To ensure a good electrical contact even under mechanical stress, the varistor column must be held together under pressure. This can be done by tension members, for example, ropes or rods are preferably clamped in glass fiber reinforced plastic in the end fittings under train. The tension elements surround the varistor column and thus form a cage around them.
For use in gas-insulated switchgear surge arresters have a fluid-tight housing, which surrounds one or more diverting elements. The housing is filled to increase the dielectric strength with a fluid, usually sulfur hexafluoride. The housing is usually made of metal and is electrically grounded. An end fitting of the discharge element is grounded via a contact made through the housing. The other end fitting is electrically connected via a high voltage feedthrough with a located on the outside of the housing contact, which serves to connect to the switchgear. In particular larger surge arresters often have at their high voltage end of a control hood, which is slipped over the end of the varistor column as a cylinder closed on one side. In the simplest case, the varistor column is electrically connected to the end fittings and the earth-side end fitting to the housing cover, so that an electrical connection of the varistor column with the housing. About the grounding of the housing then the connection of the varistor column is made to earth. If occurring discharge processes are to be registered, the varistor column must be connected to a monitoring device arranged outside the fluid-tight housing. For this purpose, a separate from the housing grounding path of the varistor column is needed. To provide this, an electrical connection must be electrically isolated from the housing from the varistor column to an out-of-housing contact.
From the older German application of the applicant with the file number 10 2011 077 394.0 a generic surge arrester is known with a passage in the ground-side housing cover, between the diverter and the housing wall. The electrical connection between the varistor column and the bushing is made via a cable.

Ein weiterer Überspannungsableiter ist aus US4015228 A bekannt. Aufgabe der vorliegenden Erfindung ist es, einen Überspannungsableiter anzugeben, der eine erleichterte Montage und eine kompaktere Bauform ermöglicht.
Die Aufgabe wird mit den Mitteln der Erfindung gemäß Patentanspruch 1 gelöst.
Dabei weist ein Überspannungsableiter eine in einem Gehäuse angeordnete Ableitsäule auf. Die Ableitsäule umfasst ein Ableitelement, Zugelemente sowie eine erdseitige und eine hochspannungsseitige Endarmatur. Das Ableitelement ist zwischen den Endarmaturen mittels der Zugelemente eingespannt. Weiterhin weist der Überspannungsableiter eine elektrische Durchführung mit einem gegenüber dem Gehäuse isolierten Strompfad vom Inneren des Gehäuses zum Äußeren des Gehäuses auf. Erfindungsgemäß ist eine Längsachse der Durchführung koaxial mit einer Längsachse des Ableitelementes angeordnet und das Ableitelement über Verbindungsmittel mit der Durchführung elektrisch verbunden. Die Verbindungsmittel bilden dabei eine elektrische Verbindung zwischen Ableitelement und Durchführung aus, die gegen die erdseitige Endarmatur elektrisch isoliert ist und die durch eine Durchgangsöffnung in der erdseitigen Endarmatur geführt ist.
Indem die Durchführung durch eine Durchgangsöffnung in der erdseitigen Endarmatur geführt ist, wird kein zusätzlicher Bauraum neben der Endarmatur mit entsprechendem Isolationsabstand für die Durchführung benötigt, der Überspannungsableiter kann dadurch kompakter aufgebaut werden. Auch in axialer Richtung führt diese Lösung zu kleineren Abmessungen, da der Bauraum im Inneren der Endarmatur für die Durchführung genutzt werden kann. Außerdem ist ein einfaches Vormontieren des Blocks aus Ableitelement, Endarmaturen und Zugelemente sowie der Durchführung möglich und der Zusammenbau kann durch die koaxiale Anordnung durch einfaches Zusammenstecken erfolgen, was die Montage vereinfacht.Another surge arrester is out US4015228A known. Object of the present invention is to provide a surge arrester, which allows easier installation and a more compact design.
The object is achieved with the means of the invention according to claim 1.
In this case, a surge arrester has a discharge column arranged in a housing. The delivery column comprises a discharge element, Tensile elements and a ground-side and a high-voltage side end fitting. The discharge element is clamped between the end fittings by means of the tension elements. Furthermore, the surge arrester has an electrical leadthrough with a current path insulated from the housing from the interior of the housing to the exterior of the housing. According to the invention, a longitudinal axis of the feedthrough is arranged coaxially with a longitudinal axis of the diverting element and the diverting element is electrically connected to the feedthrough via connecting means. The connecting means form an electrical connection between the discharge element and the feedthrough, which is electrically insulated from the earth-side end fitting and which is guided through a passage opening in the earth-side end fitting.
By the implementation is guided through a passage opening in the earth-side end fitting, no additional space is required in addition to the end fitting with a corresponding insulation distance for the implementation, the surge arrester can be made more compact. Also in the axial direction, this solution leads to smaller dimensions, since the space in the interior of the end fitting can be used for the implementation. In addition, a simple pre-assembly of the block of diverter, end fittings and tension members and the implementation is possible and the assembly can be done by the coaxial arrangement by simply mating, which simplifies assembly.

Erfindungsgemäß ist das Gehäuse fluiddicht ausgebildet und mit einem Isoliergas gefüllt. Insbesondere wenn als Isoliergas Schwefelhexafluorid verwendet wird, lassen sich durch die gegenüber Luft geringeren Isolationsabstände sehr kompakte Überspannungsableiter konstruieren.
In einer vorteilhaften Ausgestaltung weist das Gehäuse einen Gehäusedeckel auf, auf dem die erdseitige Endarmatur angeordnet ist. Die Durchführung führt dabei durch den Gehäusedeckel. Dadurch lassen sich Durchführung und Ableitsäule leicht außerhalb des Gehäuses montieren und zusammenbauen.According to the invention, the housing is formed fluid-tight and filled with an insulating gas. In particular, if sulfur hexafluoride is used as the insulating gas, it is possible to construct very compact surge arresters by virtue of the fact that insulating distances are less than air.
In an advantageous embodiment, the housing has a housing cover, on which the earth-side end fitting is arranged. The implementation leads through the housing cover. As a result, the feed-through and delivery columns can be easily mounted and assembled outside the housing.

Vorzugsweise weist der Gehäusedeckel eine Druckausgleichsvorrichtung zum Ausgleichen eines Überdruckes im Inneren des Gehäuses auf.Preferably, the housing cover has a pressure compensation device for equalizing an overpressure in the interior of the housing.

Ferner wird bevorzugt, dass der Gehäusedeckel eine verschließbare Revisionsöffnung aufweist. Eine Revisionsöffnung erlaubt das einfache Öffnen des Gehäuses zu Wartungszwecken.Furthermore, it is preferred that the housing cover has a closable access opening. An inspection opening allows easy opening of the housing for maintenance purposes.

Es wird auch bevorzugt, dass der Gehäusedeckel eine Füll- und Ablassvorrichtung für Isoliergas aufweist. Mit der Füll- und Ablassvorrichtung kann das Gehäuse, ohne es zu öffnen, mit Isoliergas gefüllt werden oder zu Wartungszwecken das Isoliergas aus dem Gehäuse entnommen werden. Damit ist gewährleistet, dass dabei kein Isoliergas in die Atmosphäre entweichen kann.It is also preferred that the housing cover has a filling and discharge device for insulating gas. With the filling and discharge device, the housing without being opened can be filled with insulating gas or the insulating gas can be removed from the housing for maintenance purposes. This ensures that no insulating gas can escape into the atmosphere.

Durch die Unterbringung von Druckausgleichsvorrichtungen und/oder Revisionsöffnungen und/oder Füll- und Ablassvorrichtungen im Gehäusedeckel lässt sich das Gehäuse einfacher konstruieren.By accommodating pressure compensation devices and / or inspection openings and / or filling and discharge devices in the housing cover, the housing can be constructed more easily.

Besonders vorteilhaft weisen die Verbindungsmittel einen Erdkontakt und ein in Richtung der Längsachse der Durchführung federelastisches Element auf. Dabei weist der Erdkontakt eine ebene Auflagefläche, auf der sich das Ableitelement abstützt, und eine Aufnahme für das federelastische Element auf. Diese Ausgestaltung gewährleistet eine besonders zuverlässige elektrische Verbindung.Particularly advantageously, the connecting means on a ground contact and a spring-elastic element in the direction of the longitudinal axis of the implementation. In this case, the earth contact has a flat bearing surface, on which the discharge element is supported, and a receptacle for the resilient element. This embodiment ensures a particularly reliable electrical connection.

In einer weiteren vorteilhaften Ausgestaltung ist das Ableitelement durch ein elektrisch isolierendes Distanzelement von der erdseitigen Endarmatur beabstandet. Das Ableitelement ist dadurch elektrisch von der Endarmatur isoliert. Dies verhindert vorteilhaft elektrische Überschläge zwischen Ableitelement und Endarmatur.In a further advantageous embodiment, the discharge element is spaced by an electrically insulating spacer element of the earth-side end fitting. The diverter is thereby electrically isolated from the end fitting. This advantageously prevents electrical flashovers between the discharge element and the end fitting.

Besonders vorteilhaft ist das Distanzelement rohrförmig ausgebildet und das federelastische Element zumindest teilweise innerhalb des Distanzelementes angeordnet. Dadurch wird eine besonders kompakte Konstruktion möglich. Damit Isoliergas in das Rohrinnere des Distanzelementes eindringen kann, kann das Distanzelement Öffnungen in der Rohrwand aufweisen.Particularly advantageously, the spacer element is tubular and arranged the resilient element at least partially within the spacer element. This makes a particularly compact design possible. So that insulating gas can penetrate into the tube interior of the spacer element, the spacer element may have openings in the tube wall.

Vorzugsweise ist die Aufnahme des Erdkontaktes als ringförmiger Ansatz zur Führung des Distanzelementes und/oder des federelastischen Elementes ausgebildet. Durch die Führung von Distanzelement und/oder federelastischem Element wird die Montage erleichtert.Preferably, the recording of the earth contact is designed as an annular projection for guiding the spacer element and / or the resilient element. By guiding spacer and / or resilient element assembly is facilitated.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung ist vorgesehen, dass die erdseitige Endarmatur durch den Gehäusedeckel gebildet wird. Die Zugelemente der Ableitsäule sind dabei auf der Erdseite direkt im Gehäusedeckel verankert und fixieren somit das Ableitelement am Gehäusedeckel. Der Gehäusedeckel bildet so die erdseitige Endarmatur, was besonders materialeffizient ist.In a further advantageous embodiment of the invention it is provided that the earth-side end fitting is formed by the housing cover. The tension elements of the Ableitsäule are anchored on the ground side directly in the housing cover and thus fix the discharge on the housing cover. The housing cover thus forms the earth-side end fitting, which is particularly material-efficient.

Im Folgenden wird die Erfindung anhand der Zeichnungen näher erläutert. Dabei zeigen:

Figur 1
eine perspektivische Schnittdarstellung eines erfindungsgemäßen Überspannungsableiters,
Figur 2
eine perspektivische Schnittdarstellung eines Gehäusedeckels mit einer elektrischen Durchführung,
Figur 3
eine perspektivische Schnittdarstellung des erdseitigen Endes des Aktivteils eines erfindungsgemäßen Überspannungsableiters,
Figur 4
eine alternative Ausführungsform eines erfindungsgemäßen Überspannungsableiters.
In the following the invention will be explained in more detail with reference to the drawings. Showing:
FIG. 1
a perspective sectional view of a surge arrester according to the invention,
FIG. 2
a perspective sectional view of a housing cover with an electrical feedthrough,
FIG. 3
a perspective sectional view of the earth-side end of the active part of a surge arrester according to the invention,
FIG. 4
an alternative embodiment of a surge arrester according to the invention.

Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided in all figures with the same reference numerals.

In der Figur 1 ist das fertig montierte erdseitige Ende eines erfindungsgemäßen Überspannungsableiters 1 ohne Gehäuse dargestellt. Ein Ableitelement 2 ist aus mehreren säulenartig zusammengesetzten Varistorelementen aufgebaut und zwischen zwei Endarmaturen 5, einer erdseitigen und einer hochspannungsseitigen, von denen hier nur die erdseitige dargestellt ist, mit Hilfe von Zugelementen 7, von denen hier nur eines dargestellt ist, eingespannt. Die Zugelemente 7 sind parallel zur Längsachse 30 des Ableitelementes 2 angeordnet und umgeben dieses in radialer Richtung. Durch die Längsachse 30 des Ableitelementes 2 ist eine axiale Richtung definiert. Die Zugelemente 7 sind häufig aus glasfaserverstärktem Kunststoff und mit Befestigungsbuchsen 8, die auf die Zugelemente 7 aufgecrimpt, aufgepresst oder geklebt werden, in den Endarmaturen 5 verankert. Am hier nicht dargestellten hochspannungsseitigen Ende des Ableitelementes 2 sind die Zugelemente 7 in ähnlicher Weise in einer Endarmatur 5 befestigt. An der erdseitigen Stirnseite des Ableitelementes 2 ist ein scheibenförmiger Erdkontakt 3 angeordnet. Ein rohrförmiges Distanzelement 17 zwischen Erdkontakt 3 und Endarmatur 5 beabstandet in axialer Richtung das Ableitelement 2 von der Endarmatur 5 und stellt so einen ausreichenden Isolationsabstand zwischen Erdkontakt 3 und Befestigungsbuchse 8 beziehungsweise Erdkontakt 3 und Endarmatur 5 sicher. Das Distanzelement 17 taucht dabei in axialer Richtung in eine kreisförmige Öffnung 23 in der Endarmatur 5 ein und stützt sich an einem radialen Vorsprung 24 in dieser Öffnung 23 ab. Das Distanzelement 17 ist aus einem form- und temperaturbeständigen elektrisch isolierenden Material gefertigt und weist insbesondere eine hohe Biegefestigkeit auf. Häufig wird hier ein verstärkter, insbesondere ein glasfaserverstärkter Kunststoff verwendet. Dadurch, dass das Distanzelement 17 aus einem elektrisch isolierenden Material gefertigt ist, ist das Ableitelement 2 gegen die erdseitige Endarmatur 5 elektrisch isoliert. Der Erdkontakt 3 weist auf seiner dem Ableitelement 2 abgewandten Stirnseite einen ringförmigen Ansatz 21 auf. Dieser weist einen Außendurchmesser auf, der dem Innendurchmesser des Distanzelementes 17 entspricht, so dass die radial außen liegende Seite des Ansatzes 21 als Führung für das Distanzelement 17 dient. Der auch Aktivteil 18 genannte Block aus Ableitelement 2, Endarmaturen 5, Zugelementen 7 mit Befestigungsbuchsen 8, sowie dem Distanzelement 17 kann so leicht vormontiert werden. Figur 3 zeigt das erdseitige Ende eines solchen Aktivteils 18, jedoch ist nur eines von mehreren Zugelementen 7 dargestellt.In the FIG. 1 the finished mounted earth-side end of a surge arrester 1 according to the invention is shown without housing. A diverting element 2 is constructed from a plurality of columnar varistor elements and is clamped between two end fittings 5, one on the earth side and one on the high side, of which only the earth side is shown here, by means of tension elements 7, of which only one is shown here. The tension elements 7 are arranged parallel to the longitudinal axis 30 of the diverting element 2 and surround this in the radial direction. By the longitudinal axis 30 of the diverter 2 an axial direction is defined. The tension elements 7 are often made of fiberglass reinforced plastic and with mounting sockets 8, which are crimped onto the tension elements 7, pressed or glued, anchored in the end fittings 5. At the high-voltage-side end of the diverter element 2, not shown here, the tension elements 7 are fastened in an end fitting 5 in a similar manner. At the earth-side end face of the discharge element 2, a disk-shaped earth contact 3 is arranged. A tubular spacer 17 between ground contact 3 and end fitting 5 spaced in the axial direction of the diverter 2 of the end fitting 5 and thus ensures a sufficient isolation distance between ground contact 3 and mounting bushing 8 and Erdkontakt 3 and end fitting 5 safe. The spacer element 17 immersed in the axial direction in a circular opening 23 in the end fitting 5 and is supported on a radial projection 24 in this opening 23 from. The spacer 17 is made of a shape and temperature-resistant electrically insulating material and in particular has a high bending strength. Frequently, a reinforced, in particular a glass fiber reinforced plastic is used here. Characterized in that the spacer element 17 is made of an electrically insulating material, the discharge element 2 is electrically insulated from the earth-side end fitting 5. The ground contact 3 has on its the discharge element 2 facing away End face on an annular projection 21. This has an outer diameter which corresponds to the inner diameter of the spacer element 17, so that the radially outer side of the projection 21 serves as a guide for the spacer element 17. The active part 18 mentioned block of diverter 2, end fittings 5, tension elements 7 with mounting sockets 8, and the spacer 17 can be easily pre-assembled. FIG. 3 shows the earth-side end of such an active part 18, but only one of several tension elements 7 is shown.

Figur 1 zeigt weiterhin die erdseitige Gehäusewand des Gehäuses, die durch einen Gehäusedeckel 4 gebildet ist. Eine Durchführung 10 ist durch eine Öffnung in dem Gehäusedeckel 4 hindurchgeführt. Die Durchführung 10 weist dabei ein Isolierrohr 13, eine äußere Isolierbuchse 12, eine innere Isolierbuches 14 und einen Durchführungsleiter 11 auf. Zur Montage der Durchführung 10 wird zunächst das Isolierrohr 13 in die Öffnung des Gehäusedeckels 4 eingeführt. Das Isolierrohr 13 ragt dabei auf beiden Seiten aus der Öffnung hervor. Über den überstehenden Teil des Isolierrohres 13 wird nun auf der Innenseite des Gehäusedeckels 4 die innere Isolierbuchse 14 aufgesetzt. Diese ist ebenfalls rohrförmig und weist einen Innendurchmesser auf, der dem Außendurchmesser des Isolierrohres 13 entspricht. Die Isolierbuchse 14 steht dabei in axialer Richtung über das gehäuseinnere Ende des Isolierrohres 13 über. Isolierrohr 13 und innere Isolierbuchse 14 sind so koaxial zur Längsachse 30 angeordnet. Auf der Außenseite des Gehäuses wird eine äußere Isolierbuchse 12 auf das gehäuseaußenseitige Ende des Isolierrohres 13 aufgesetzt. Die äußere Isolierbuchse 12 weist dabei eine ringförmige Vertiefung 29 auf, die das gehäuseaußenseitige Ende des Isolierrohres 13 aufnimmt. Ein ringförmiger Ansatz 28 der äußeren Isolierbuchse 12 ragt auf der radialen Innenseite des Isolierrohres 13 in axialer Richtung in dieses hinein. Ein Durchführungsleiter 11, hier als Metallbolzen dargestellt, wird dann von der Gehäuseaußenseite durch die äußere Isolierbuchse 12, durch das Isolierrohr 13 bis auf die Gehäuseinnenseite geführt. Das gehäuseinnenseitige Ende des Durchführungsleiters 11 steht dabei über die innere Isolierbuchse 14 über und ragt in das Gehäuse hinein. Ein Anschlag, beispielsweise eine Mutter, am gehäuseaußenseitigen Ende des Durchführungsleiters 11 begrenzt dessen Eindringtiefe. Über das gehäuseinnere Ende des Durchführungsleiters 11 wird eine Unterlegscheibe 15 gelegt, die auf der inneren Isolierbuchse 14 aufliegt und dann mit einer Mutter 16 fixiert wird. Die äußere Isolierbuchse 12 weist an ihren Stirnflächen Dichtungen 22, wie beispielsweise O-Ringe, auf, die die äußere Isolierbuchse 12 gegen das Gehäuse, hier gegen den Gehäusedeckel 4, und gegen den Durchführungsleiter 11 abdichten. Die Durchführung 10 stellt somit eine gasdichte elektrische Verbindung von der Innenseite des Gehäuses zur Außenseite des Gehäuses dar, die gegen das Gehäuse elektrisch isoliert ist. Figur 2 zeigt einen Gehäusedeckel 4 mit einer solchen fertig montierten Durchführung 10. FIG. 1 further shows the ground-side housing wall of the housing, which is formed by a housing cover 4. A passage 10 is passed through an opening in the housing cover 4. In this case, the bushing 10 has an insulating tube 13, an outer insulating bushing 12, an inner insulating bushing 14 and a bushing conductor 11. For mounting the bushing 10, the insulating tube 13 is first inserted into the opening of the housing cover 4. The insulating tube 13 protrudes on both sides out of the opening. About the protruding part of the insulating tube 13, the inner insulating bush 14 is now placed on the inside of the housing cover 4. This is likewise tubular and has an inner diameter which corresponds to the outer diameter of the insulating tube 13. The insulating bush 14 stands in the axial direction over the housing-internal end of the insulating tube 13 via. Insulating tube 13 and inner insulating bushing 14 are arranged coaxially to the longitudinal axis 30. On the outside of the housing, an outer insulating sleeve 12 is placed on the housing outer side end of the insulating tube 13. The outer insulating bush 12 in this case has an annular recess 29 which receives the housing outer side end of the insulating tube 13. An annular projection 28 of the outer insulating sleeve 12 protrudes on the radial inner side of the insulating tube 13 in the axial direction into this. A feedthrough conductor 11, shown here as a metal bolt, is then guided from the outside of the housing through the outer insulating bushing 12, through the insulating tube 13 to the inside of the housing. The housing inside End of the feedthrough conductor 11 stands over the inner insulating bushing 14 and protrudes into the housing. A stop, for example a nut, on the housing outer side end of the feedthrough conductor 11 limits its penetration depth. About the housing interior end of the feedthrough conductor 11, a washer 15 is placed, which rests on the inner insulating bushing 14 and is then fixed with a nut 16. The outer insulating sleeve 12 has at its end faces seals 22, such as O-rings, on which seal the outer insulating sleeve 12 against the housing, here against the housing cover 4, and against the feedthrough 11. The bushing 10 thus constitutes a gas-tight electrical connection from the inside of the housing to the outside of the housing, which is electrically insulated from the housing. FIG. 2 shows a housing cover 4 with such a fully assembled passage 10th

Des Weiteren zeigt Figur 1 den Gehäusedeckel 4 mit Durchführung 10 und Aktivteil 18 in zusammengebautem Zustand. Die Endarmatur 5 ist am Gehäusedeckel 4 mittels Schrauben 6 befestigt. Die innere Isolierbuchse 14 mit dem gehäuseinneren Ende des Durchführungsleiters 11 ragt dabei zumindest teilweise in das Distanzelement 17 hinein. Über ein federelastisches Element 9, hier eine Schraubenfeder, die im Inneren des Distanzelementes 17 zwischen Erdkontakt 3 und Unterlegscheibe 15 angeordnet ist, ist eine elektrische Verbindung zwischen dem Erdkontakt 3 und der Durchführung 10 hergestellt. Erdkontakt 3 und federelastisches Element 9 stellen so Verbindungsmittel dar, die das Ableitelement 2 mit der Durchführung 10 elektrisch verbinden. Die radiale Innenseite des Ansatzes 21 des Erdkontaktes 3 stellt eine Aufnahme für das federelastische Element 9 bereit, das durch diese Aufnahme geführt und zentriert wird. Damit Isoliergas in das Innere des Distanzelementes 17 eindringen kann, sind Öffnungen 20 in der Wand des Distanzelementes 17 vorgesehen. Ein elektrischer Strompfad führt nun vom Ableitelement 2 über den Erdkontakt 3, das federelastische Element 9, Unterlegscheibe 15, Mutter 16 und Durchführungsleiter 11 auf die Außenseite des Gehäuses. Dieser Strompfad führt elektrisch gegen Endarmatur 5 und Gehäuse isoliert durch die Endarmatur 5 und durch die Gehäusewand, hier den Gehäusedeckel 4, hindurch.Further shows FIG. 1 the housing cover 4 with implementation 10 and active part 18 in the assembled state. The end fitting 5 is fixed to the housing cover 4 by means of screws 6. The inner insulating bushing 14 with the housing-internal end of the bushing conductor 11 projects at least partially into the spacer element 17. Via a resilient element 9, here a coil spring, which is arranged in the interior of the spacer element 17 between earth contact 3 and washer 15, an electrical connection between the ground contact 3 and the bushing 10 is made. Ground contact 3 and spring-elastic element 9 thus constitute connection means which electrically connect the discharge element 2 to the feedthrough 10. The radial inner side of the projection 21 of the earth contact 3 provides a receptacle for the resilient element 9, which is guided and centered by this recording. So that insulating gas can penetrate into the interior of the spacer element 17, openings 20 are provided in the wall of the spacer element 17. An electrical current path now leads from the diverter 2 via the ground contact 3, the resilient element 9, washer 15, nut 16 and feedthrough 11 on the outside of the housing. This Current path leads electrically against the end fitting 5 and housing insulated by the end fitting 5 and through the housing wall, here the housing cover 4, through.

Obwohl in den Figuren 1 und 3 nur jeweils ein Aktivteil 18 und eine Durchführung 10 gezeigt ist, kann ein erfindungsgemäßer Überspannungsableiter 1 auch in einem Gehäuse mehrere Aktivteile 18 aufweisen. Jedem Aktivteil 18 ist dann eine eigene Durchführung 10, die jeweils koaxial zum Ableitelement 2 des jeweiligen Aktivteils 18 angeordnet ist, zugeordnet.Although in the FIGS. 1 and 3 only one active part 18 and one bushing 10 is shown, a surge arrester 1 according to the invention can also have a plurality of active parts 18 in a housing. Each active part 18 is then assigned its own feedthrough 10, which is arranged coaxially with the diverting element 2 of the respective active part 18.

Die Figur 4 zeigt weitere Ausgestaltungen der Erfindung. Hier wird die erdseitige Endarmatur durch den Gehäusedeckel 4 gebildet. Die Zugelemente 7 sind mittels der Befestigungsbuchsen 8 direkt am Gehäusedeckel 4 befestigt, der somit die erdseitige Endarmatur bildet. Der Gehäusedeckel 4 schließt das Gehäuse 19 an einer Stirnseite ab. Dichtungen 32 gewährleisten dabei Gasdichtheit. In einem Gehäuse 19 sind hier mehrere Aktivteile 18 untergebracht. Jedem Aktivteil 18 ist eine eigene Durchführung 10 zugeordnet. Die beiden Aktivteile 18 weisen eine gemeinsame erdseitige Endarmatur auf, die hier durch den Gehäusedeckel 4 bereitgestellt wird.The FIG. 4 shows further embodiments of the invention. Here, the earth-side end fitting is formed by the housing cover 4. The tension elements 7 are fastened by means of the mounting bushes 8 directly to the housing cover 4, which thus forms the earth-side end fitting. The housing cover 4 closes off the housing 19 on an end face. Seals 32 ensure gas tightness. In a housing 19 more active parts 18 are housed here. Each active part 18 is assigned its own implementation 10. The two active parts 18 have a common earth-side end fitting, which is provided here by the housing cover 4.

Der Gehäusedeckel 4 weist außerdem eine Druckausgleichsvorrichtung 25 auf. Bei dieser Druckausgleichsvorrichtung 25 deckt eine Berstscheibe 26 eine ringförmige Öffnung im Gehäusedeckel 4 ab. Die Berstscheibe 26 ist auf der Gehäuseinnenseite mit einem ringförmigen Flansch 31 befestigt. Dichtungen 33 dichten die Berstscheibe 26 gegen den Gehäusedeckel 4 gasdicht ab. Entsteht im Gehäuse 19 ein Überdruck, birst die Berstscheibe 26 und entlässt den Überdruck ins Freie, eine Beschädigung des Gehäuses 19 wird damit verhindert. Eine Ausblasschute 27 auf der Außenseite der Öffnung lenkt die ausströmenden Gase in eine gewünschte Richtung ab. Anstatt oder zusätzlich zu der Druckausgleichsvorrichtung 25 kann der Gehäusedeckel 4 eine Füll- und Ablassvorrichtung für Isoliergas und/oder eine Revisionsöffnung aufweisen. Die Füll- und Ablassvorrichtung für Isoliergas dient dabei dazu, Isoliergas, beispielsweise Schwefelhexafluorid, in das Gehäuse 19 einzufüllen oder aus dem Gehäuse abzulassen. Die Füll- und Ablassvorrichtung ist dabei so ausgestaltet, dass kein Isoliergas unkontrolliert entweichen kann. Die Revisionsöffnung dient dazu, beispielsweise zu Montage-, Wartungs- oder Kontrollzwecken, an Elemente im Inneren des Gehäuses 19 zu gelangen, ohne diese zerlegen zu müssen.The housing cover 4 also has a pressure compensation device 25. In this pressure compensation device 25, a rupture disk 26 covers an annular opening in the housing cover 4. The rupture disk 26 is fixed on the inside of the housing with an annular flange 31. Seals 33 seal the rupture disk 26 against the housing cover 4 gas-tight. If an overpressure arises in the housing 19, the rupture disk 26 bursts and releases the excess pressure to the outside, thus preventing damage to the housing 19. A Ausblasschute 27 on the outside of the opening deflects the outflowing gases in a desired direction. Instead of or in addition to the pressure compensation device 25, the housing cover 4 may have a filling and discharge device for insulating gas and / or a revision opening. The filling and discharge device for insulating gas serves to insulating gas, For example, sulfur hexafluoride to be filled in the housing 19 or to drain from the housing. The filling and discharge device is designed so that no insulating gas can escape uncontrollably. The inspection opening serves, for example, for assembly, maintenance or inspection purposes, to get to elements inside the housing 19 without having to disassemble them.

Claims (10)

  1. Surge arrester (1) for a gas-insulated switchgear and having an arresting element (2), which is arranged in a housing (19) and is clamped between an end fitting (5) on the earth side and an end fitting (5) on the high-voltage side by means of tension elements (7), which are under tension, and having an electrical feedthrough (10), which has a current path that is insulated with respect to the housing (19), from the interior of the housing (19) to the exterior of the housing (19), wherein the housing (19) is metallic, earthed, formed as fluidtight and filled with an insulating gas, wherein a longitudinal axis (30) of the feedthrough (10) is arranged coaxially in relation to a longitudinal axis (30) of the arresting element (2) and wherein the arresting element (2) is electrically connected to the feedthrough (10) by way of connecting means (3, 9), which are electrically insulated with respect to the end fitting (5) on the earth side and led through a throughopening (23) in the end fitting (5) on the earth side.
  2. Surge arrester (1) according to Claim 1,
    characterized
    in that the housing (19) has a housing cover (4), on which the end fitting (5) on the earth side is arranged.
  3. Surge arrester (1) according to Claim 2,
    characterized
    in that the housing cover (4) has a pressure-equalizing device (25) for equalizing a positive pressure in the interior of the housing (19).
  4. Surge arrester (1) according to either of Claims 2 and 3,
    characterized
    in that the housing cover (4) has a closable inspection opening.
  5. Surge arrester (1) according to one of Claims 2 to 4,
    characterized
    in that the housing cover (4) has a filling and bleeding device for insulating gas.
  6. Surge arrester (1) according to one of the preceding claims,
    characterized
    in that the connecting means (3, 9) have an earth contact (3) with a planar supporting surface, on which the arresting element (2) supports itself, and an element (9) that is spring-elastic in the direction of the longitudinal axis (30) of the feedthrough (10), wherein the earth contact (3) has a receptacle (21) for the spring-elastic element (9).
  7. Surge arrester (1) according to Claim 6,
    characterized
    in that the arresting element (2) is kept at a distance from the end fitting (5) on the earth side by an electrically insulating spacing element (17).
  8. Surge arrester (1) according to Claim 7,
    characterized
    in that the spacing element (17) is formed as tubular and in that the spring-elastic element (9) is at least partially arranged within the spacing element (17).
  9. Surge arrester (1) according to either of Claims 7 and 8,
    characterized
    in that the receptacle (21) of the earth contact (3) is formed as an annular attachment for guiding the spacing element (17) and/or the spring-elastic element (9).
  10. Surge arrester (1) according to one of claims 2-5,
    characterized
    in that the end fitting (5) on the earth side is formed by the housing cover (4).
EP12170022.3A 2012-05-30 2012-05-30 Enclosed surge absorber with central feedthrough Active EP2669903B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP12170022.3A EP2669903B1 (en) 2012-05-30 2012-05-30 Enclosed surge absorber with central feedthrough
PCT/EP2013/058612 WO2013178411A1 (en) 2012-05-30 2013-04-25 Encapsulated surge protector having a central duct
KR1020147033168A KR101674785B1 (en) 2012-05-30 2013-04-25 Encapsulated surge protector having a central duct
CN201380028701.XA CN104350553B (en) 2012-05-30 2013-04-25 Packaged type discharge device for overvoltage protection with center sleeve
JP2015514395A JP6113274B2 (en) 2012-05-30 2013-04-25 Encapsulated surge arrester with center bushing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12170022.3A EP2669903B1 (en) 2012-05-30 2012-05-30 Enclosed surge absorber with central feedthrough

Publications (2)

Publication Number Publication Date
EP2669903A1 EP2669903A1 (en) 2013-12-04
EP2669903B1 true EP2669903B1 (en) 2018-09-12

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EP (1) EP2669903B1 (en)
JP (1) JP6113274B2 (en)
KR (1) KR101674785B1 (en)
CN (1) CN104350553B (en)
WO (1) WO2013178411A1 (en)

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AT14491U1 (en) * 2014-02-20 2015-12-15 Wopfinger Baustoffindustrie Gmbh audit module
DE102017203657A1 (en) * 2017-03-07 2018-09-13 Siemens Aktiengesellschaft Surge arresters and method of manufacturing a surge arrester
DE102017216024A1 (en) * 2017-09-12 2019-03-14 Siemens Aktiengesellschaft Surge arresters
AT523645B1 (en) * 2020-04-06 2021-10-15 Avl List Gmbh Adapter arrangement and component assembly

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US4015228A (en) * 1974-06-10 1977-03-29 Matsushita Electric Industrial Co., Ltd. Surge absorber
DE3112477C2 (en) * 1981-03-26 1984-02-02 Siemens AG, 1000 Berlin und 8000 München Surge arrester with shielding bodies surrounding a column of arrester elements
JPH06260305A (en) * 1993-03-08 1994-09-16 Fuji Electric Co Ltd Current-terminal leading-out structure of lightning arrester
WO1997028591A1 (en) * 1996-01-31 1997-08-07 Siemens Aktiengesellschaft Metal-encased switchgear
DE10000617A1 (en) * 2000-01-10 2001-07-12 Abb Hochspannungstechnik Ag Surge arresters
KR100697917B1 (en) * 2005-01-12 2007-03-20 엘에스전선 주식회사 PTC current limiting device
KR100697919B1 (en) * 2005-01-12 2007-03-20 엘에스전선 주식회사 PTC current limiting device having multi insulator
US20060152330A1 (en) * 2005-01-12 2006-07-13 Jong-Sung Kang PTC current limiting device having molding part made of insulating material
JP4809379B2 (en) * 2007-01-22 2011-11-09 昭和電線ケーブルシステム株式会社 Arrester and mounting area of arrester
WO2008090735A1 (en) * 2007-01-22 2008-07-31 Swcc Showa Cable Systems Co., Ltd. Arrestor
JP2010004656A (en) * 2008-06-20 2010-01-07 Mitsubishi Electric Corp Bursting plate, bursting apparatus and gas-insulated switching apparatus using the bursting plate
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Publication number Publication date
CN104350553A (en) 2015-02-11
KR20150004407A (en) 2015-01-12
JP6113274B2 (en) 2017-04-12
WO2013178411A1 (en) 2013-12-05
KR101674785B1 (en) 2016-11-09
EP2669903A1 (en) 2013-12-04
JP2015524242A (en) 2015-08-20
CN104350553B (en) 2017-09-29

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