EP0372106A1 - Überspannungsbegrenzer - Google Patents

Überspannungsbegrenzer Download PDF

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Publication number
EP0372106A1
EP0372106A1 EP88120326A EP88120326A EP0372106A1 EP 0372106 A1 EP0372106 A1 EP 0372106A1 EP 88120326 A EP88120326 A EP 88120326A EP 88120326 A EP88120326 A EP 88120326A EP 0372106 A1 EP0372106 A1 EP 0372106A1
Authority
EP
European Patent Office
Prior art keywords
arrester
protective housing
elements
surge arrester
surge
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.)
Granted
Application number
EP88120326A
Other languages
English (en)
French (fr)
Other versions
EP0372106B1 (de
Inventor
Bengt Johnnerfelt
Bengt Thors
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.)
ABB AB
Original Assignee
Asea Brown Boveri AB
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8199631&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0372106(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to AU26354/88A priority Critical patent/AU603020B2/en
Application filed by Asea Brown Boveri AB filed Critical Asea Brown Boveri AB
Priority to DE19883889729 priority patent/DE3889729T2/de
Priority to ES88120326T priority patent/ES2056881T3/es
Priority to EP19880120326 priority patent/EP0372106B1/de
Publication of EP0372106A1 publication Critical patent/EP0372106A1/de
Application granted granted Critical
Publication of EP0372106B1 publication Critical patent/EP0372106B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors

Definitions

  • the invention relates to a surge arrester according to the introductory part of claim 1.
  • the invention aims at a surge arrester of the above-men­tioned kind with a protective housing that meets the afore­ mentioned resistance requirements but can be provided in a considerably simpler way than what has previously been pos­sible.
  • the invention suggests a surge arrester according to the introductory part of claim 1, which is characterised by the features of the characterising part of claim 1.
  • a protective housing of cross-­linked HD (High Density) polyethylene is used, which housing is resistant to deformation under operating conditions for the surge arrester and remains intact when subjected to the influence of arrester elements which have been heated to temperatures of the magnitude stated above.
  • the wall thickness of the protective housing is made sufficient, preferably at least 2 mm, for the parts of the protective housing located furthest away from the arrester elements to attain a temperature, during maximum heating of the arrester elements, which is safely below the softening temperature of the cross-linked HD polyethylene, i.e. even if the inside of the protective housing is in contact with an arrester element which is briefly heated to a temperature in the vicinity of 200°C, the outside is only heated, in the presence of the heat-absorbing bodies, to a temperature safely below 130°C. The outside is preferably heated to at most around 100°C.
  • the heat-absorbing bodies have a total length in the longitudinal direction of the protective hous­ ing which is at least 10% and preferably 15-35% of the total length of the arrester elements in the same direction.
  • the varistor material in the arrester element may be of a known kind and preferably 70-97 mole per cent thereof con­sists of ZnO with additives of one or more oxides and/or carbonates of Bi, Sb, Cr, Mn, Co, Ni, Si, B, Ba, Pb, Al, each in an amount of 0.01-10 mole percent.
  • the arrester ele­ments are manufactured from a powder of the varistor mate­rial which under known conditions are moulded pressed and sintered into bodies of the desired shape.
  • the electrodes on the end surfaces of the arrester element may, inter alia, consist of layers of copper or aluminium which have been applied by arc spraying or other spraying of metal, or of varnish layers which are electrically conduc­tive, for example of epoxy resin containing powder of sil­ver. It may also consist of surface layers in the varistor material itself which have been made low-ohmic by laser treatment.
  • cross-linked HD polyethylene Upon heating, cross-linked HD polyethylene is transformed from crystalline to substantially amorphous state. In the amorphous state, the shape of an object of the polymer mate­rial may be changed and, upon cooling, be brought to main­tain the changed shape. If the object is heated again, the object resumes its original shape.
  • This property of cross-­linked HD polyethylene is utilized when it is applied around the stack of arrester elements disposed on top of each other with the heat-absorbing bodies disposed therebe­tween.
  • the cross-linked HD polyethylene is suitably of the kind which is manufactured by silane grafting of linear HD polyethylene and a subsequent cross-linking of the grafted polymer after extrusion or other moulding by the moulded product being subjected to moisture or water so that the hy­drolyzable groups in the silane radical are hydrolyzed and provide siloxane bonds between the grafted polyethylene molecules.
  • This cross-linked HD polyethylene has a softening temperature of around 130°C.
  • the end electrodes which like the heat-absorbing bodies may advantageously be of aluminium or copper, are preferably provided with annular recesses or projections, into which and between which, respectively, parts of the protective housing project.
  • the protective housing is provided on its outside with means extending the creep distance.
  • This can be done by cov­ering the outside of the protective housing with a separate creep distance extending body, supported by the protective housing, preferably a body which, in a known manner, is formed with a plurality of surrounding projections arranged one after the other in the longitudinal direction of the protective housing. It can also be done by forming the out­side of the protective housing itself with a plurality of creep distance extending projections arranged one after the other in the longitudinal direction of the protective hous­ing. The projections are then of the same material as the protective housing and form a coherent unit with the rest of the protective housing.
  • the tubes are heated to 150°C, whereafter the polyethylene tube is expanded by compressed air supplied to the interior of the polymer tube, so that its outer enve­lope surface makes allround contact with the inside of the metal tube. Thereafter, the tubes are cooled down in this expanded state of the polymer tube, whereby its inner diame­ter becomes 32 mm.
  • the expansion of the polyethylene tube can also be performed, inter alia, with a mandrel.
  • a plurality of arrester elements 11 in the form of circular-cylindrical ZnO blocks provided with electrodes 11a alternately with a plurality of heat-absorb­ing bodies 12 in the form of circular-cylindrical blocks of aluminium are placed, in a stack one after the other, in the tube of HD polyethylene.
  • the polyethy­lene tube is designated 10 in the Figures.
  • an electrode 13 is arranged in the form of a substantially circular-cylindrical block of aluminium.
  • the ZnO blocks 11 have a diameter of 30 mm and a height of 47 mm and the aluminium blocks 12 have the same diameter and a height of 15 mm.
  • That part 13a of the aluminium blocks 13 which faces the interior of the surge arrester has a diameter of 30 mm
  • that part 13b of the aluminium blocks 13 which faces away from the interior has a diameter of 28 mm.
  • the blocks 13 have a height of 40 mm. They are provided with annular slots or recesses 14 with a depth of 2 mm and, at the end facing the interior of the surge arrester, with a spring 15 which exerts a pressure on a washer 16, made for example, of aluminium.
  • the blocks and the tube are heated to a temperature of 150°C.
  • This causes the tube 10 to shrink so as to make contact with the envelope surfaces of the blocks 11,12,and 13, as is clear from Figure 1, and to penetrate into the slots 14, thus forming a pro­tective housing for the arrester elements.
  • the springs 15 ensure that the blocks 12 and 13, the latter via the washers 16, make contact, with an effective contact pressure, with the electrodes 11a secured to the end surfaces of the ZnO blocks.
  • the electrodes 11a may consist of sprayed-on layers of aluminium.
  • the wall thickness of the tube, after shrink­ing, is still 3 mm.
  • That part of the protective housing which makes contact with the part 13b on each end electrode 13 is surrounded with a binding strap or a hose clamp 17 to strengthen the fixing of the protective housing to the end electrodes.
  • a cap 18 for example of aluminium, together with a seal, for example in the form of an O-ring or a sealing compound 19, such as silicone rubber.
  • the surge arrester is provided with terminals 20.
  • the surge arrester according to Figure 1 is designed for indoor use.
  • Surge arresters according to the invention which are de­signed for outdoor use, are provided, as is clear from Fig­ure 2, with a creep distance extending body 21, which is formed with a plurality of surrounding projections 21a ar­ranged one after the other in the longitudinal direction of the protective housing.
  • the body 21 may be of an elastomer, for example ethylene propylene terpolymer (EPDM rubber) and is passed over the protective housing 10. It may also con­sist of a shrinking plastic, for example of a cross-linked ethylene-propylene polymer or cross-linked HD polyethylene, applied on the protective housing 10 by shrinkage. The body 21 is applied on the protective housing 10 before the caps 18 are fitted.
  • a creep distance extending body 21 is formed with the same shape as that shown in Figure 2 as part of the protective housing 10, so that the parts 10 and 21 form a coherent unit of cross-­linked HD polyethylene manufactured in one piece.
  • the protective housing is then provided with a plurality of creep distance extending projections, arranged one after the other in the longitudinal direction of the protective housing, of a kind analogous to those des­ignated 21a in Figure 2.
  • the protective housing is then preferably manufactured by injection moulding, since a manu­facture by extrusion of a thick-walled tube with subsequent milling away of material for forming projections would in­volve a considerable waste of material.
  • FIG 3 illustrates an alternative embodiment of the surge arrester according fo Figure 1.
  • the surge arrester shown in Figure 3 may also be used for outdoor use if provided with a creep distance extending body 21 similar to that shown in Figure 2.
  • spring elements in the form of disc springs 22 are arranged between the ar­rester elements 11 and the heat-absorbing bodies 12 and be­tween the arrester elements 11 and the end electrodes 13 to ensure maintenance of an effective contact pressure between the parts 11, 12 and 13 in the entire stack under varying conditions.
  • springs 15 of the kind shown in Figures 1 and 2 which are built into the end electrodes in the manner shown in Figures 1 and 2 and in analogous manner into the heat-absorbing bodies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
EP19880120326 1988-12-06 1988-12-06 Überspannungsbegrenzer Revoked EP0372106B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU26354/88A AU603020B2 (en) 1988-12-06 1988-11-30 Surge arrester
DE19883889729 DE3889729T2 (de) 1988-12-06 1988-12-06 Überspannungsbegrenzer.
ES88120326T ES2056881T3 (es) 1988-12-06 1988-12-06 Disipador de sobretensiones.
EP19880120326 EP0372106B1 (de) 1988-12-06 1988-12-06 Überspannungsbegrenzer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19880120326 EP0372106B1 (de) 1988-12-06 1988-12-06 Überspannungsbegrenzer

Publications (2)

Publication Number Publication Date
EP0372106A1 true EP0372106A1 (de) 1990-06-13
EP0372106B1 EP0372106B1 (de) 1994-05-25

Family

ID=8199631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880120326 Revoked EP0372106B1 (de) 1988-12-06 1988-12-06 Überspannungsbegrenzer

Country Status (4)

Country Link
EP (1) EP0372106B1 (de)
AU (1) AU603020B2 (de)
DE (1) DE3889729T2 (de)
ES (1) ES2056881T3 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2685532A1 (fr) * 1991-12-20 1993-06-25 Soule Sa Parafoudre a proprietes mecaniques perfectionnees.
FR2685533A1 (fr) * 1991-12-20 1993-06-25 Soule Sa Parafoudre comprenant une piece de contact perfectionnee.
FR2698736A1 (fr) * 1992-11-27 1994-06-03 Soule Sa Perfectionnements aux parafoudres à varistances notamment pour haute tension.
US5363266A (en) * 1992-06-18 1994-11-08 Raychem Corporation Electrical surge arrester
EP1067565A3 (de) * 1999-07-09 2002-05-08 Kabushiki Kaisha Toshiba Überspannungsableiter und Verfahren zu seiner Herstellung
WO2011095590A1 (de) 2010-02-05 2011-08-11 Abb Technology Ag Überspannungsableiter
WO2019140586A1 (en) * 2018-01-18 2019-07-25 Abb Schweiz Ag Surge arrester and associated manufacturing method
CN110993225A (zh) * 2019-11-19 2020-04-10 深圳供电局有限公司 变压器中性点避雷装置
CN114898956A (zh) * 2022-05-26 2022-08-12 国网安徽省电力有限公司青阳县供电公司 一种基于智慧台区的配电网供电线路用避雷器
CN115036087A (zh) * 2022-06-23 2022-09-09 山东泰开互感器有限公司 一种避雷器芯体的安装结构及其基于激光定位的装配方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007146A1 (de) * 2005-02-11 2006-08-24 Siemens Ag Verfahren zur Ummantelung eines Varistorblockes mit einer elektrisch isolierenden Umhüllung sowie Varistorblock für einen Überspannungsableiter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002014A1 (de) * 1980-01-21 1981-07-23 Lev Romanovič Moskva Škundin Einrichtung zum ueberspannungsschutz
GB2073965A (en) * 1980-04-08 1981-10-21 Bowthorpe Emp Ltd Surge diverter/arrester
EP0153199A2 (de) * 1984-02-21 1985-08-28 RAYCHEM CORPORATION (a Delaware corporation) Rückstellbare Polyethylen-Komposition und Gegenstand
EP0230103A2 (de) * 1985-11-08 1987-07-29 Raychem Gmbh Packungsanordnung, insbesondere für Überspannungsableiter
EP0233022A2 (de) * 1986-01-29 1987-08-19 Bowthorpe Industries Limited Elektrischer Überspannungsableiter/-ablenker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463405A (en) * 1981-02-19 1984-07-31 Electric Power Research Institute, Inc. Fail safe surge arrester
US4899248A (en) * 1984-12-14 1990-02-06 Hubbell Incorporated Modular electrical assemblies with plastic film barriers
FR2619244B1 (fr) * 1987-08-06 1992-09-04 Sediver Ste Europ Isolateurs V Procede de fabrication d'un parafoudre et parafoudre obtenu par ce procede

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002014A1 (de) * 1980-01-21 1981-07-23 Lev Romanovič Moskva Škundin Einrichtung zum ueberspannungsschutz
GB2073965A (en) * 1980-04-08 1981-10-21 Bowthorpe Emp Ltd Surge diverter/arrester
EP0153199A2 (de) * 1984-02-21 1985-08-28 RAYCHEM CORPORATION (a Delaware corporation) Rückstellbare Polyethylen-Komposition und Gegenstand
EP0230103A2 (de) * 1985-11-08 1987-07-29 Raychem Gmbh Packungsanordnung, insbesondere für Überspannungsableiter
EP0233022A2 (de) * 1986-01-29 1987-08-19 Bowthorpe Industries Limited Elektrischer Überspannungsableiter/-ablenker

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2685532A1 (fr) * 1991-12-20 1993-06-25 Soule Sa Parafoudre a proprietes mecaniques perfectionnees.
FR2685533A1 (fr) * 1991-12-20 1993-06-25 Soule Sa Parafoudre comprenant une piece de contact perfectionnee.
EP0549432A1 (de) * 1991-12-20 1993-06-30 Soule Materiel Electrique Blitzableiter mit mechanisch verbesserten Eigenschaften
US5363266A (en) * 1992-06-18 1994-11-08 Raychem Corporation Electrical surge arrester
FR2698736A1 (fr) * 1992-11-27 1994-06-03 Soule Sa Perfectionnements aux parafoudres à varistances notamment pour haute tension.
EP0605265A1 (de) * 1992-11-27 1994-07-06 Soule Materiel Electrique Überspannungsableiter auf Varistor-Basis, insbesondere für hohe Spannungen
EP1067565A3 (de) * 1999-07-09 2002-05-08 Kabushiki Kaisha Toshiba Überspannungsableiter und Verfahren zu seiner Herstellung
US8593775B2 (en) 2010-02-05 2013-11-26 Abb Technology Ag Surge arrester
WO2011095590A1 (de) 2010-02-05 2011-08-11 Abb Technology Ag Überspannungsableiter
WO2019140586A1 (en) * 2018-01-18 2019-07-25 Abb Schweiz Ag Surge arrester and associated manufacturing method
CN111684549A (zh) * 2018-01-18 2020-09-18 Abb电网瑞士股份公司 电涌放电器及相关的制造方法
US11380464B2 (en) 2018-01-18 2022-07-05 Hitachi Energy Switzerland Ag Surge arrester and associated manufacturing method
CN111684549B (zh) * 2018-01-18 2022-08-30 日立能源瑞士股份公司 电涌放电器及相关的制造方法
CN110993225A (zh) * 2019-11-19 2020-04-10 深圳供电局有限公司 变压器中性点避雷装置
CN114898956A (zh) * 2022-05-26 2022-08-12 国网安徽省电力有限公司青阳县供电公司 一种基于智慧台区的配电网供电线路用避雷器
CN114898956B (zh) * 2022-05-26 2022-12-02 国网安徽省电力有限公司青阳县供电公司 一种基于智慧台区的配电网供电线路用避雷器
CN115036087A (zh) * 2022-06-23 2022-09-09 山东泰开互感器有限公司 一种避雷器芯体的安装结构及其基于激光定位的装配方法

Also Published As

Publication number Publication date
AU2635488A (en) 1990-07-19
AU603020B2 (en) 1990-11-01
ES2056881T3 (es) 1994-10-16
EP0372106B1 (de) 1994-05-25
DE3889729T2 (de) 1994-12-15
DE3889729D1 (de) 1994-06-30

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