EP0673543B1 - Overvoltage suppressor with a metal oxide resistor - Google Patents

Overvoltage suppressor with a metal oxide resistor Download PDF

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Publication number
EP0673543B1
EP0673543B1 EP94900756A EP94900756A EP0673543B1 EP 0673543 B1 EP0673543 B1 EP 0673543B1 EP 94900756 A EP94900756 A EP 94900756A EP 94900756 A EP94900756 A EP 94900756A EP 0673543 B1 EP0673543 B1 EP 0673543B1
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EP
European Patent Office
Prior art keywords
columns
column
metal oxide
modules
resistance elements
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Expired - Lifetime
Application number
EP94900756A
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German (de)
French (fr)
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EP0673543A1 (en
Inventor
Johannes Kirch
Hans Leuschner
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Siemens AG
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Siemens AG
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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

Definitions

  • the invention is in the field of protection technology for power distribution systems and is concerned with the structural design of a surge arrester, with an insulating material housing and with a metal oxide resistor arranged inside the insulating material housing, the metal oxide resistor consisting of two or more columns connected in parallel from a larger one There are a number of resistance elements, of which each column has two separate holding plates, between which the resistance elements of the column are arranged, and which in turn are connected by means of insulating holding rods which fix the resistance elements laterally.
  • Surge arresters with a metal oxide resistor as a discharge element generally consist of a large number of flat cylindrical resistance elements arranged one above the other in a column-like manner, the column formed from these resistance elements being arranged within a ceramic insulator or plastic insulator which is tightly sealed at the top and bottom ("IEEE transactions on powerdelivery, volume PWRD- 1, No. 1, January 1986, pp. 151 to 156; Figure 6).
  • metal oxide arresters To increase the energy absorption capacity or to reduce the residual voltage values, it is customary in the case of metal oxide arresters to electrically connect a plurality of resistance columns made up of individual resistance elements in parallel. For this purpose, two to four columns are arranged side by side on a support plate within a common insulating material housing, with the aid of which they are inserted into the common housing. This is known for example from US-A-4,326,232.
  • the invention provides a surge arrester construction which facilitates the handling and the measurement accessibility of the individual columns.
  • a surge arrester with the features of the preamble of protection claim 1, it is provided that the columns at the lower end of the insulating housing are arranged on a board centered on the axis of the insulating housing and that each of the columns is assigned a separate compression spring for contacting.
  • Such an embodiment therefore provides that the individual columns constructed from resistance elements each form an independent module that represents a mechanically stable construction.
  • the required number of each of these modules is placed next to one another in the insulating housing and mechanically and electrically connected and fixed to one another at the two ends by suitable design measures.
  • the standardized, mutually identical structure of several modules significantly simplifies production.
  • the individual modules are easy to handle during the installation of the surge arrester. It is also possible to measure the individual modules before the surge arrester is completely assembled and thus to check the current distribution.
  • the separate structure of the individual resistance columns enables the modules to be displaced relative to one another when the arrester is overloaded, so as to open up a pressure relief duct with the largest possible cross section in the area of the burning arc.
  • This displaceability can be achieved by appropriate design measures on the upper and possibly also on the lower End of each pillar.
  • FIG. 1 shows a vertical section of the housing with a view of the arrester element and
  • FIG. 2 shows a cross section through the arrester in the region of the lower end.
  • FIG. 1 shows a surge arrester, the housing of which, in a known manner, consists of the ceramic insulator 1 and a metal foot part 2 and a metal head part 3.
  • the housing could also consist of a plastic.
  • a circuit board 4 in the form of a support star, which is fixed by means of a mounting ring 41, this mounting ring simultaneously fixing a membrane 42 and a sealing ring 43.
  • These modules consist of a multiplicity of resistance elements 64 arranged one above the other, which are located between the lower holding plate 61 and the upper holding plate 62, the holding plates being connected to one another by means of three holding rods 63 arranged uniformly distributed around the circumference.
  • a block-like spacer 5 is fastened to the lower holding plate 61, via which the respective columnar module 6 in a form-fitting manner cross-like web body 44 is centered.
  • the pressure ring 13 also serves to fix the upper membrane 12 and the associated sealing ring.
  • FIG. 2 four columnar modules 6 are arranged within the ceramic insulator 1.
  • the holding plates 61 and 62 of the modules are triangular in shape to ensure the smallest possible radial expansion of the surge arrester as a whole.

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

Abstract

In an overvoltage suppressor with a multi-column arrangement of the metal oxide resistors within an insulating housing (1), each column (6) is to be made of resistance elements (64) in a mechanically self-supporting structure. To this end, the resistance elements (64) of each column are arranged between two holding plates (61, 62) interconnected by holding rods (63). The individual columns (6), called 'modules', are arranged to be individually centred on a plate (4, 44) fitted at the lower end of the insulating housing (1).

Description

Die Erfindung liegt auf dem Gebiet der Schutztechnik für Energieverteilungsanlagen und befaßt sich mit der konstruktiven Ausgestaltung eines Überspannungsableiters, mit einem Isolierstoffgehäuse und mit einem innerhalb des Isolierstoffgehäuses angeordneten Metalloxid-Widerstand, wobei der Metalloxid-Widerstand aus zwei oder mehr elektrisch parallel geschalteten Säulen aus einer größeren Anzahl von Widerstandselementen besteht, von denen jede Säule zwei gesonderte Halteplatten aufweist, zwischen denen die Widerstandselemente der Säule angeordnet sind, und die ihrerseits mittels isolierender, die Widerstandselemente seitlich fixierender Haltestangen verbunden sind.The invention is in the field of protection technology for power distribution systems and is concerned with the structural design of a surge arrester, with an insulating material housing and with a metal oxide resistor arranged inside the insulating material housing, the metal oxide resistor consisting of two or more columns connected in parallel from a larger one There are a number of resistance elements, of which each column has two separate holding plates, between which the resistance elements of the column are arranged, and which in turn are connected by means of insulating holding rods which fix the resistance elements laterally.

Überspannungsableiter mit einem Metalloxidwiderstand als Ableitelement bestehen im allgemeinen aus einer Vielzahl säulenartig übereinander angeordneter flacher zylindrischer Widerstandselemente, wobei die aus diesen Widerstandselementen gebildete Säule innerhalb eines oben und unten dicht verschlossenen Keramikisolators bzw. Kunststoffisolators angeordnet ist ("IEEE-Transactions on powerdelivery, Volume PWRD-1, No. 1, January 1986, S. 151 bis 156; Figur 6).Surge arresters with a metal oxide resistor as a discharge element generally consist of a large number of flat cylindrical resistance elements arranged one above the other in a column-like manner, the column formed from these resistance elements being arranged within a ceramic insulator or plastic insulator which is tightly sealed at the top and bottom ("IEEE transactions on powerdelivery, volume PWRD- 1, No. 1, January 1986, pp. 151 to 156; Figure 6).

Zur Erhöhung des Energieaufnahmevermögens oder zur Reduzierung der Restspannungswerte ist es bei Metalloxid-Ableitern üblich, mehrere aus einzelnen Widerstandselementen aufgebaute Widerstandssäulen elektrisch parallel zu schalten. Hierzu sind innerhalb eines gemeinsamen Isolierstoffgehäuses zwei bis vier Säulen nebeneinander auf einer Tragplatte angeordnet, mit deren Hilfe sie in das gemeinsame Gehäuse eingesetzt werden. Dies ist beispielsweise aus der US-A-4,326,232 bekannt.To increase the energy absorption capacity or to reduce the residual voltage values, it is customary in the case of metal oxide arresters to electrically connect a plurality of resistance columns made up of individual resistance elements in parallel. For this purpose, two to four columns are arranged side by side on a support plate within a common insulating material housing, with the aid of which they are inserted into the common housing. This is known for example from US-A-4,326,232.

Durch die Erfindung wird eine Überspannungsableiterkonstruktion geschaffen, die die Handhabbarkeit und die meßtechnische Zugänglichkeit der einzelnen Säulen erleichtert. Ausgehend von einem Überspannungsableiter mit den Merkmalen des Oberbegriffes des Schutzanspruches 1 ist hierzu vorgesehen, daß die Säulen am unteren Ende des Isolierstoffgehäuses auf einer Platine zentriert zur Achse des Isolierstoffgehäuses angeordnet sind und daß jeder der Säulen eine gesonderte Druckfeder zur Kontaktierung zugeordnet ist.The invention provides a surge arrester construction which facilitates the handling and the measurement accessibility of the individual columns. Starting from a surge arrester with the features of the preamble of protection claim 1, it is provided that the columns at the lower end of the insulating housing are arranged on a board centered on the axis of the insulating housing and that each of the columns is assigned a separate compression spring for contacting.

Eine derartige Ausgestaltung sieht also vor, daß die einzelnen, aus Widerstandselementen aufgebauten Säulen jeweils ein eigenständiges Modul bilden, das eine mechanisch in sich tragfähige Konstruktion darstellt. Von diesen Modulen wird jeweils die benötigte Anzahl nebeneinander in das Isoliergehäuse gestellt und an den beiden Enden durch geeignete konstruktive Maßnahmen mechanisch und elektrisch miteinander verbunden und fixiert. Durch den auf diese Weise standardisierten, untereinander völlig gleichen Aufbau mehrerer Module erhält man eine wesentliche Fertigungsvereinfachung. Insbesondere sind die einzelnen Module während der Montage des Überspannungsableiters leicht handhabbar. Weiterhin ist die Möglichkeit gegeben, vor dem kompletten Zusammenbau des Überspannungsableiters die einzelnen Module auszumessen und somit die Stromaufteilung zu überprüfen. - Bezüglich des Betriebs eines solchen Uberspannungsableiters ermöglicht der getrennte Aufbau der einzelnen Widerstandssäulen bei Überlastung des Ableiters ein Verschieben der Module gegeneinander, um so im Bereich des brennenden Lichtbogens einen Druckentlastungskanal mit größtmöglichen Querschnitt freizugeben. Diese Verschiebbarkeit kann durch entsprechende konstruktive Maßnahmen am oberen und gegebenenfalls auch am unteren Ende der einzelnen Säulen gewährleistet sein.Such an embodiment therefore provides that the individual columns constructed from resistance elements each form an independent module that represents a mechanically stable construction. The required number of each of these modules is placed next to one another in the insulating housing and mechanically and electrically connected and fixed to one another at the two ends by suitable design measures. The standardized, mutually identical structure of several modules significantly simplifies production. In particular, the individual modules are easy to handle during the installation of the surge arrester. It is also possible to measure the individual modules before the surge arrester is completely assembled and thus to check the current distribution. - With regard to the operation of such a surge arrester, the separate structure of the individual resistance columns enables the modules to be displaced relative to one another when the arrester is overloaded, so as to open up a pressure relief duct with the largest possible cross section in the area of the burning arc. This displaceability can be achieved by appropriate design measures on the upper and possibly also on the lower End of each pillar.

Dadurch, daß die einzelnen Widerstandssäulen jeweils mittels einer gesonderten Druckfeder kontaktiert sind, wird für alle Module ein im wesentlichen gleich großer Kontaktdruck und somit ein gleich großer Übergangswiderstand erreicht.Because the individual resistance columns are each contacted by means of a separate compression spring, an essentially equal contact pressure and thus an equally large contact resistance is achieved for all modules.

Ein Ausführungsbeispiel des neuen Uberspannungsableiters ist in den Figuren 1 und 2 dargestellt. Dabei zeigt Figur 1 einen Vertikalschnitt des Gehäuses mit einer Ansicht des Ableiterelementes und Figur 2 einen Querschnitt durch den Ableiter im Bereich des unteren Endes.An embodiment of the new surge arrester is shown in Figures 1 and 2. 1 shows a vertical section of the housing with a view of the arrester element and FIG. 2 shows a cross section through the arrester in the region of the lower end.

Figur 1 zeigt einen Überspannungsableiter, dessen Gehäuse in bekannter Weise aus dem Keramikisolator 1 und einem metallenen Fußteil 2 sowie einem metallenen Kopfteil 3 besteht. Das Gehäuse könnte auch aus einem Kunststoff bestehen. Am unteren Ende des Keramikisolators 1 ist eine Platine 4 in Form eines Tragsternes angeordnet, die mittels eines Montageringes 41 fixiert ist, wobei dieser Montagering zugleich eine Membrane 42 und einen Dichtring 43 fixiert. Mit der Platine 4 ist weiterhin ein aufgesetzter kreuzartiger Stegkörper 44 verbunden, auf dem sich die säulenartigen Widerstandsmodule 6 abstützen. Diese Module bestehen aus einer Vielzahl übereinander angeordneter Widerstandselemente 64, die sich zwischen der unteren Halteplatte 61 und der oberen Halteplatte 62 befinden, wobei die Halteplatten mittels dreier am Umfang gleichmäßig verteilt angeordneter Haltestangen 63 miteinander verbunden sind. An der unteren Halteplatte 61 ist jeweils ein klotzartiger Abstandhalter 5 befestigt, über den der jeweilige säulenartige Modul 6 formschlüssig im kreuzartigen Stegkörper 44 zentriert ist.FIG. 1 shows a surge arrester, the housing of which, in a known manner, consists of the ceramic insulator 1 and a metal foot part 2 and a metal head part 3. The housing could also consist of a plastic. At the lower end of the ceramic insulator 1 there is a circuit board 4 in the form of a support star, which is fixed by means of a mounting ring 41, this mounting ring simultaneously fixing a membrane 42 and a sealing ring 43. A cross-shaped web body 44, on which the column-like resistance modules 6 are supported, is also connected to the circuit board 4. These modules consist of a multiplicity of resistance elements 64 arranged one above the other, which are located between the lower holding plate 61 and the upper holding plate 62, the holding plates being connected to one another by means of three holding rods 63 arranged uniformly distributed around the circumference. A block-like spacer 5 is fastened to the lower holding plate 61, via which the respective columnar module 6 in a form-fitting manner cross-like web body 44 is centered.

An der oberen Halteplatte 62 ist ebenfalls ein Abstandhalter 7 angeordnet, auf dem eine Druckfeder 8 aufliegt. Gemeinsam für alle säulenartigen Module 6 ist weiterhin eine Kontaktplatte 9 vorgesehen, die unter Zwischenschaltung von Druckstücken 10 von dem mit dem Kopfteil 3 verbundenen Druckring 11 sowie der Druckplatine 13 unter Druck gesetzt wird. Der Druckring 13 dient weiterhin zur Fixierung der oberen Membran 12 und des zugehörigen Dichtringes.A spacer 7, on which a compression spring 8 rests, is also arranged on the upper holding plate 62. Together for all column-like modules 6, a contact plate 9 is also provided, which, with the interposition of pressure pieces 10, is put under pressure by the pressure ring 11 connected to the head part 3 and the pressure plate 13. The pressure ring 13 also serves to fix the upper membrane 12 and the associated sealing ring.

Gemäß Figur 2 sind innerhalb des Keramikisolators 1 vier säulenartige Module 6 angeordnet. Die Halteplatten 61 und 62 der Module sind dabei dreieckförmig gestaltet, um eine möglichst geringe radiale Ausdehnung des Uberspannungsableiters als Ganzes zu gewährleisten.According to Figure 2, four columnar modules 6 are arranged within the ceramic insulator 1. The holding plates 61 and 62 of the modules are triangular in shape to ensure the smallest possible radial expansion of the surge arrester as a whole.

Claims (2)

  1. Surge diverter having an insulating case (1) and having a metal-oxide resistor arranged within the insulating case (1), whereby the metal-oxide resistor comprises two or more columns of a larger number of resistor elements, which columns are connected electrically in parallel, each column (6) having two separate holding plates (61, 62), between which the resistor elements of the column (6) are arranged, and which for their part are connected by means of insulating holding rods (63) which laterally fix the resistor elements in position, characterized in that the columns (6) at the lower end of the insulating case (1) are arranged on a board (4, 44) centred with respect to the axis of the insulating case (1) and in that a separate pressure spring (8) is allocated to each of the columns for contacting.
  2. Surge diverter according to claim 1, characterized in that the holding plates (61, 62) are formed in triangular manner.
EP94900756A 1992-12-08 1993-12-02 Overvoltage suppressor with a metal oxide resistor Expired - Lifetime EP0673543B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9217133U DE9217133U1 (en) 1992-12-08 1992-12-08 Surge arrester with a metal oxide resistor
DE9217133U 1992-12-08
PCT/DE1993/001159 WO1994014171A1 (en) 1992-12-08 1993-12-02 Overvoltage suppressor with a metal oxide resistor

Publications (2)

Publication Number Publication Date
EP0673543A1 EP0673543A1 (en) 1995-09-27
EP0673543B1 true EP0673543B1 (en) 1997-03-19

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ID=6887168

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Application Number Title Priority Date Filing Date
EP94900756A Expired - Lifetime EP0673543B1 (en) 1992-12-08 1993-12-02 Overvoltage suppressor with a metal oxide resistor

Country Status (6)

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US (1) US5596476A (en)
EP (1) EP0673543B1 (en)
JP (1) JPH07509809A (en)
CA (1) CA2151130C (en)
DE (2) DE9217133U1 (en)
WO (1) WO1994014171A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010010067A1 (en) * 2008-07-24 2010-01-28 Siemens Aktiengesellschaft Surge arrestor arrangement comprising an arrestor current path with a plurality of arrestor columns

Families Citing this family (10)

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JP2996059B2 (en) * 1993-07-14 1999-12-27 株式会社日立製作所 Arrester and method of assembling it
DE4413938A1 (en) * 1994-04-21 1995-11-02 Gerhild Dr Wildner Peptides as a therapeutic agent for autoimmune diseases
GB2299161A (en) * 1995-03-24 1996-09-25 Alan Philip Roper Electronic digital control unit for measuring pollution levels in liquids
DE19824606C2 (en) * 1998-06-02 2001-02-08 Siemens Ag Device for limiting overvoltages for transformers
DE10020129C1 (en) * 2000-04-14 2001-11-15 Siemens Ag Module with surge arrester for a high-voltage system
DE10104393C1 (en) * 2001-01-19 2002-04-04 Siemens Ag Support plate for high voltage (HV) overvoltage diverter, has openings for reception and positioning of rods provided by aligned curved slots in partially overlapping partial plates
DE102007048986B4 (en) 2007-10-12 2011-02-03 Tridelta Überspannungsableiter Gmbh Surge arresters
EP3057109A1 (en) 2015-02-12 2016-08-17 Siemens Aktiengesellschaft Surge arrester
DE102015214938A1 (en) 2015-08-05 2017-02-09 Siemens Aktiengesellschaft An arrester with multiple columns of resistors, with the columns attached at one end to a fixture, and a method of mounting a surge arrester
DE102018213789B4 (en) * 2018-08-16 2021-06-10 Siemens Energy Global GmbH & Co. KG Support device and surge arrester

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CH422965A (en) * 1965-02-26 1966-10-31 Oerlikon Maschf Surge arrester in insulating housing
CH615052A5 (en) * 1977-07-08 1979-12-28 Sprecher & Schuh Ag Surge arrester
JPS5834723Y2 (en) * 1979-04-16 1983-08-04 株式会社東芝 gear press lightning arrester
DE3001943A1 (en) * 1980-01-21 1981-07-23 Boris Konstantinovič Avdeenko Surge voltage arrester - with gas duct in insulated tube parallel to nonlinear resistor stack
DD208891A1 (en) * 1982-08-30 1984-04-11 Ulrich Herrmann DEVICE FOR OVERVOLTAGE PROTECTION OF LOW VOLTAGE SYSTEMS
GB8527548D0 (en) * 1985-11-08 1985-12-11 Raychem Gmbh Electrical equipment
JPH0773085B2 (en) * 1987-04-07 1995-08-02 株式会社日立製作所 Ground tank type arrester
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JP2740390B2 (en) * 1992-02-24 1998-04-15 株式会社日立製作所 Zinc oxide arrester

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010010067A1 (en) * 2008-07-24 2010-01-28 Siemens Aktiengesellschaft Surge arrestor arrangement comprising an arrestor current path with a plurality of arrestor columns
DE102008034890A1 (en) 2008-07-24 2010-02-04 Siemens Aktiengesellschaft Surge arrester arrangement with a Ableitstrompfad having several Ableitersäulen
CN102105950B (en) * 2008-07-24 2013-02-13 西门子公司 Surge arrestor arrangement comprising an arrestor current path with a plurality of arrestor columns

Also Published As

Publication number Publication date
WO1994014171A1 (en) 1994-06-23
DE9217133U1 (en) 1993-02-11
US5596476A (en) 1997-01-21
CA2151130C (en) 1998-05-26
EP0673543A1 (en) 1995-09-27
DE59305907D1 (en) 1997-04-24
CA2151130A1 (en) 1994-06-23
JPH07509809A (en) 1995-10-26

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