EP2347424A1 - Éclateur à étincelle avec un élément varistor et procédé de fabrication d'un éclateur à étincelle - Google Patents

Éclateur à étincelle avec un élément varistor et procédé de fabrication d'un éclateur à étincelle

Info

Publication number
EP2347424A1
EP2347424A1 EP09752782A EP09752782A EP2347424A1 EP 2347424 A1 EP2347424 A1 EP 2347424A1 EP 09752782 A EP09752782 A EP 09752782A EP 09752782 A EP09752782 A EP 09752782A EP 2347424 A1 EP2347424 A1 EP 2347424A1
Authority
EP
European Patent Office
Prior art keywords
varistor element
surge arrester
fitting body
traverse
bracing
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.)
Withdrawn
Application number
EP09752782A
Other languages
German (de)
English (en)
Inventor
Dirk Springborn
Gundolf Barenthin
Erhard Pippert
Markus Sulitze
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.)
Siemens AG
Original Assignee
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
Publication of EP2347424A1 publication Critical patent/EP2347424A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making

Definitions

  • Surge arrester having a varistor element and method of manufacturing a surge arrester
  • the invention relates to a surge arrester having a varistor element, against which at opposite ends a first and a second fitting body are pressed via a bracing device.
  • Such a surge arrester is known, for example, from US Pat. No. 4,812,944.
  • the local surge arrester is limited at opposite ends of its varistor element of valve bodies.
  • a clamping device is provided for bracing the valve body against the varistor element. It is proposed, for example, to form hooks on the fitting bodies, in which fibers or bands can be suspended. In order to achieve a tension between the valve bodies is further proposed to shrink the fibers or bands, for example by the action of heat radiation.
  • a surge arrester ter which is designed in a simplified and thus cheaper to manufacture. According to the invention this is achieved in a surge arrester of the type mentioned in that at least one of the fitting body has a shoulder on which a traverse of the bracing is supported and at least one tensile strand is struck on the traverse.
  • mutually facing support surfaces are formed complementary shape on traverse and shoulder.
  • the traverse lies with a support surface on a support surface of the shoulder.
  • the support surfaces should be at least partially complementary shape, so that accidental slipping or deflecting the traverse is prevented by the shoulder.
  • the shape-complementary support surfaces have sections which at least partially have surface sections extending in the direction of the contact force to be generated by the clamping device.
  • Such surface sections can, for. B. protrude perpendicularly from the support surfaces and protrude into this.
  • pins, holes, locking lugs, recesses and the like can be arranged.
  • An advantageous embodiment may provide that a few number of tension cords is struck on a crossbar.
  • a traverse is a rigid body, to which, for example, several tensile cords are struck. The tension cords are spaced from each other. The traverse can be used to move forces between the traction strands are transmitted or forces are transferred to other components.
  • a traverse is preferably formed as a cross member, which serves a mechanical stabilization, connection and attachment.
  • At least one of the fitting body relative to the Verspannhalle the fitting body on the varistor element has a plurality of symmetrically distributed circumferentially arranged shoulders.
  • a holding force between the valve bodies is generated in a clamping direction.
  • the clamping direction preferably passes through the varistor element.
  • the individual tension cords should be arranged distributed on the outer circumference of the varistor element, so that a cage formed from the individual tensile strands surrounds the varistor element on the shell side.
  • additional mechanical protection of the varistor element can be ensured.
  • Assigning now several shoulders symmetrically distributed on the circumference of the fitting body it is possible, for example, in a similar design of several trusses and several tension strands an approximately uniform distribution of tension cords. Due to the position of the shoulders, a position of the trusses is clearly defined. Consequently, a cage structure is formed around the varistor element by the tensile strands attached to the trusses.
  • a bracing device can have a plurality of independently arranged on shoulders of a valve body truss.
  • the bracing device has two oppositely oriented uniform cross-members. If one equips the bracing with oppositely oriented similarly shaped trusses, so it is possible to connect the trusses by means of at least one, preferably by means of several, preferably in a paired number of tension strands with each other. It is thus possible, for example, to press fitting bodies located at opposite ends of the varistor element with shoulders arranged thereon with the interposition of the varistor element against one another. By choosing the length of the tension cords, there is a possibility to regulate the tensioning force to be applied by the tensioning device. Depending on requirements, the fitting body can be pressed against the varistor element with a more or less strong force. In addition to a formation of a mechanically rigid angular rigid
  • the first and the second fitting body are shaped similarly.
  • a use of similar valve bodies makes it possible to choose a mounting position of the surge arrester comparatively free. Furthermore, the use of identical parts additionally reduces the number of components to be designed. As a result, the storage can be made cheaper, thereby reducing the total manufacturing costs for a surge arrester.
  • a further object of the invention is to specify a method for producing a surge arrester having a first and a second fitting body, which are pressed against opposite ends of a varistor element by means of a bracing device.
  • the object is achieved in a method of the above type in that at opposite ends of the varistor each of the first and the second Armatur- tur sciences placed and pressed by external forces against the varistor element that a first and a second traverse at opposite ends at least a pull string are struck that the first cross member on a shoulder of the first fitting body and the second Traverse are placed on a shoulder of the second fitting body and the external forces are reduced and pressing the fitting body against the varistor element on the tensioned tensile strand and the traverses of the bracing takes place.
  • a compression of the assemblies to be joined together occurs.
  • This compression can be in the range of a few millimeters, the compression should preferably be reversible.
  • a bracing is created, which can be placed on shoulders of the two fitting body.
  • the external forces are reduced. Due to the reduction of the external forces, there is a reversal of the compression of the varistor element or of the fitting body during the application of the external forces. By the withdrawal of the external forces is an elongation of the stack of valve bodies and the varistor element. As a result, the tension cords are placed under increased tension. About the attached to the valve bodies trusses a lengthening of the valve body and the varistor element is limited and the stack pressed against each other.
  • an angle rigid stack is formed, which, for example, after a successful tightening of the tension cords is disassembled by again external forces from opposite directions can act on the valve body and compresses the stack of valve bodies and varistor, so that the tension cords are relaxed and the trusses can be taken down from the shoulders.
  • This provides a possibility for carrying out, for example, repairs to surge arresters produced in this way.
  • Figure 3 is a strained surge arrester.
  • a bracing device can have one or more bracing elements.
  • the bracing element has a first cross member 1 and a second cross member 2.
  • the first and the second traverse 1, 2 are designed as similar shaped body.
  • Trusses 1, 2 each have a cuboidal basic structure, wherein two opposite ends of the trusses 1, 2 each have broken corners in such a way that a portion of a lateral surface of a circular cylinder is formed.
  • the trusses 1, 2 In the region of the rounded ends, the trusses 1, 2 each have recesses 3a, 3b. These recesses 3a, 3b are, for example, shaped like a blind hole.
  • the recesses 3a, 3b lie in a support surface.
  • the support surface is bounded by two mutually parallel body edges of the traverse 1, 2. The two parallel body edges go over into curved body edges of the rounded ends and connect the two mutually parallel body edges each end. In the support surface a recess 4 is formed.
  • the recess 4 is formed in the present example as a groove.
  • the support surface of the traverse 1, 2 with the corresponding recess 4 serves to be placed on a shape-complementary support surface of a shoulder 9a, 9b, 9c, 9d.
  • Pulling cords 5a, 5b are used in the recesses 3a, 3b.
  • the tension cords 5a, 5b are designed as dimensionally stable rods.
  • the tension cords should preferably have an electrically insulating effect, so that formation of a flow path between the cross members 1, 2 arranged at the end of the tension strands and oriented opposite to one another is prevented.
  • Fiberglass rods for forming the tension cords 5a, 5b have proven successful.
  • other suitable materials may be used.
  • the tension cords 5a, 5b are inserted into the recesses 3a, 3b of the trusses 1, 2 and struck there. An attack of the tension cords 5a, 5b on the trusses 1, 2 can be done by various methods or devices.
  • a bracing element is formed, which can transmit forces between the traverses 1, 2 via the tension cords 5a, 5b.
  • FIG. 2 shows a stage during the manufacture of a surge arrester.
  • the surge arrester has a varistor element 6.
  • the varistor element 6 is, for example, a sintered metal oxide body which optionally has a multiplicity of stacked subsections.
  • a first fitting body 7 and a second fitting body 8 are designed to be electrically conductive, so that via the fitting body 7, 8, an electrical contacting of the varistor element 6 can take place.
  • various shapes for the fitting body 7, 8 may be provided.
  • the two fitting body 7, 8 are formed similarly, wherein they are opposite to each other aligned at opposite ends of the varistor element 6 are placed on the varistor element 6.
  • the varistor element 6 preferably has circular end faces for this purpose. On the circular faces justify istsflachen the fitting body 7, 8 are placed.
  • contacting blocks are provided.
  • cable lugs can be screwed to the contacting blocks in order to bring about electrical contacting of the surge arrester. It can also be provided that corresponding threaded rods or other suitable elements are screwed or formed on the contacting blocks.
  • the two fitting bodies 7, 8 have radially projecting shoulders 9a, 9b, 9c, 9d on their circumference. These shoulders 9a, 9b, 9c, 9d are equipped with a support surface.
  • surveys 10 are formed in the support surfaces of the trusses 1, 2 to the wells opposite.
  • the support surfaces of the trusses 1, 2 at least partially opposite to the support surfaces of the shoulders 9a, 9b, 9c, 9d formed.
  • the stack of first fitting body 7, varistor element 6 and second fitting body 8 is compressed by external forces F and compressed.
  • at least one bracing element can advantageously be placed on the shoulders 9a, 9b, 9c, 9d but several bracing elements.
  • the distance between mutually aligned arranged shoulders 9a, 9b, 9c, 9d on the first fitting body 7 and the second fitting body 8 is selected such that the tensioning device with the first cross member 1 and second cross member 2, via the ailing pull cords 5a, 5b with each other are connected, latching on the elevations 10 on the shoulders 9a, 9b, 9c, 9d are pushed in a direction of delay. Due to the counter-running recess 4 in the support surfaces of the trusses 1, 2 is a position assurance of the trusses 1, 2 at the shoulders 9a, 9b, 9c, 9d given.
  • two bracing elements forming a bracing device are provided which have similar braces 1, 2 and tension elements 5a, 5b. If necessary, the number of bracing elements can be increased. For example, it is possible to arrange three or four bracing elements around the varistor element 6 symmetrically distributed. For this purpose, a corresponding number of shoulders on the two valve bodies 7, 8 are provided.
  • the external forces F are reduced.
  • the compression caused on the armature bodies 7, 8 and the varistor element 6 reverses, so that an expansion of the armature body 7, 8 and the varistor element 6 takes place in the clamping direction of the clamping device.
  • the Verspannetti the bracing are set under increased tension.
  • the bracing device is dimensioned such that the expanding stack of valve bodies 7, 8 and varistor element 6 itself can not fully expand to its original dimension.
  • the surge arrester formed in this way can be surrounded by a housing for its protection. It is possible, for example, to use electrically insulating throws or to provide a plastic encapsulation on the surge arrester.

Landscapes

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

Abstract

L'invention concerne un éclateur à étincelle comprenant un élément varistor (6). On presse contre l'élément varistor (6) un premier et un deuxième corps d'induit (7, 8) à l'aide d'un dispositif de serrage. Au moins l'un des corps d'induit (7, 8) comprend un épaulement (9a, 9b, 9c, 9d) sur lequel prend appui une traverse (1, 2) du dispositif de serrage. La traverse (1, 2) porte une tige de traction (5a, 5b).
EP09752782A 2008-11-11 2009-11-02 Éclateur à étincelle avec un élément varistor et procédé de fabrication d'un éclateur à étincelle Withdrawn EP2347424A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008057232A DE102008057232A1 (de) 2008-11-11 2008-11-11 Überspannungsableiter mit einem Varistorelement und Verfahren zur Herstellung eines Überspannungsableiters
PCT/EP2009/064458 WO2010054947A1 (fr) 2008-11-11 2009-11-02 Éclateur à étincelle avec un élément varistor et procédé de fabrication d'un éclateur à étincelle

Publications (1)

Publication Number Publication Date
EP2347424A1 true EP2347424A1 (fr) 2011-07-27

Family

ID=41507935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09752782A Withdrawn EP2347424A1 (fr) 2008-11-11 2009-11-02 Éclateur à étincelle avec un élément varistor et procédé de fabrication d'un éclateur à étincelle

Country Status (9)

Country Link
US (1) US8531812B2 (fr)
EP (1) EP2347424A1 (fr)
KR (1) KR20110082559A (fr)
CN (1) CN102209996B (fr)
AU (1) AU2009315833A1 (fr)
BR (1) BRPI0921887A2 (fr)
CA (1) CA2743094A1 (fr)
DE (1) DE102008057232A1 (fr)
WO (1) WO2010054947A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010043655B4 (de) * 2010-11-09 2012-08-30 Siemens Aktiengesellschaft Überspannungsableiter mit dehnbarer Manschette
DE102011078210A1 (de) * 2011-06-28 2013-01-03 Siemens Aktiengesellschaft Überspannungsableiter
EP2690633A1 (fr) * 2012-07-26 2014-01-29 Siemens Aktiengesellschaft Paratonnerre avec éléments de traction maintenus par des boucles
US11894166B2 (en) 2022-01-05 2024-02-06 Richards Mfg. Co., A New Jersey Limited Partnership Manufacturing process for surge arrestor module using compaction bladder system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000055869A1 (fr) * 1999-03-17 2000-09-21 Siemens Aktiengesellschaft Coupe-circuit de surtension dote d'un element de traction

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406691A1 (de) 1984-02-24 1985-09-05 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung zur verhinderung des abhoerens bei digitalen fernsprechapparaten
GB8527548D0 (en) 1985-11-08 1985-12-11 Raychem Gmbh Electrical equipment
DE4306691A1 (de) * 1993-03-04 1994-11-03 Abb Management Ag Ueberspannungsableiter
SE516123C2 (sv) 1994-05-13 2001-11-19 Abb Ab Ventilavledare, metod för framställning av en sådan samt användning
SE504075C2 (sv) 1994-08-29 1996-11-04 Asea Brown Boveri Ventilavledare
US5712757A (en) * 1996-06-27 1998-01-27 Raychem Corporation Surge arrester having ridged terminals
EP1447822B1 (fr) 2003-02-12 2009-09-09 ABB Technology AG Composant active pour limiteur de surtension
DE102005024206B4 (de) * 2005-05-25 2007-03-15 Tridelta Überspannungsableiter Gmbh Überspannungsableiter mit Käfig-Design

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000055869A1 (fr) * 1999-03-17 2000-09-21 Siemens Aktiengesellschaft Coupe-circuit de surtension dote d'un element de traction

Also Published As

Publication number Publication date
US8531812B2 (en) 2013-09-10
BRPI0921887A2 (pt) 2015-12-29
CA2743094A1 (fr) 2010-05-20
CN102209996B (zh) 2013-12-18
WO2010054947A1 (fr) 2010-05-20
DE102008057232A1 (de) 2010-05-12
CN102209996A (zh) 2011-10-05
US20110216464A1 (en) 2011-09-08
AU2009315833A1 (en) 2010-05-20
KR20110082559A (ko) 2011-07-19

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