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EP0274674B1 - Procédé de fabrication d'un parafoudre et parafoudre obtenu par ce procédé - Google Patents

Procédé de fabrication d'un parafoudre et parafoudre obtenu par ce procédé Download PDF

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Publication number
EP0274674B1
EP0274674B1 EP87118254A EP87118254A EP0274674B1 EP 0274674 B1 EP0274674 B1 EP 0274674B1 EP 87118254 A EP87118254 A EP 87118254A EP 87118254 A EP87118254 A EP 87118254A EP 0274674 B1 EP0274674 B1 EP 0274674B1
Authority
EP
European Patent Office
Prior art keywords
core
fittings
manufacturing
lightning arrester
pellets
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.)
Expired - Lifetime
Application number
EP87118254A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0274674A1 (fr
Inventor
René Parraud
Denis Thuillier
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.)
Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA
Original Assignee
Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA
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 Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA filed Critical Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA
Priority to AT87118254T priority Critical patent/ATE63399T1/de
Publication of EP0274674A1 publication Critical patent/EP0274674A1/fr
Application granted granted Critical
Publication of EP0274674B1 publication Critical patent/EP0274674B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • Y10T29/49082—Resistor making
    • Y10T29/49087—Resistor making with envelope or housing
    • 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
    • Y10T29/49082—Resistor making
    • Y10T29/49101—Applying terminal

Definitions

  • the present invention relates to a method of manufacturing a lightning arrester.
  • a surge arrester is a device which is placed between the phase and the ground of a high-voltage line and which makes it possible to limit the amplitude and the duration of atmospheric overvoltages (shock due to lightning and induction phenomena in conductors) , or temporary electrical overvoltages in the network (operating shock).
  • a surge arrester The functions of a surge arrester are therefore on the one hand to permanently support the nominal operating voltage, and on the other hand to drain the strong discharge current appearing during a temporary overvoltage, so as to protect the equipment from the line (transformers ).
  • a core made of a varistor type material based for example on zinc oxide ZnO, the electrical resistivity of which is highly non-linear as a function of the applied voltage.
  • European patent application EP-A-0196 370 discloses a lightning arrester structure comprising a central core of varistor type material, two end fittings threaded and glued to the ends of the side wall of said core, with two intermediate spring blades between the bases of this core and the fitting; an insulating coating with fins is provided around the side wall of the assembly.
  • Such a structure has drawbacks because it involves on the one hand a machining of the ends of the core, machining which risks damaging it, by creating cracks or fractures, and on the other hand a bonding of the fittings which can disturb their contact electric with the ends of the core.
  • a lightning arrester the central core of which comprises several cylindrical pellets stacked in varistor-type material, two extreme fittings being in contact with the pellets by means of blades. springs; this assembly is mechanically linked by a unitary sheath made of a heat-shrinkable material. Such a method is difficult to implement and therefore expensive.
  • the object of the present invention is to simplify the manufacture of lightning arresters and to reduce their cost.
  • the present invention relates to a method of manufacturing a lightning arrester comprising a central core of substantially revolution shape comprising at least one varistor, two extreme metal fittings and a side casing of electrically insulating material, characterized in that said metal fittings are overmolded on the metallized ends of said central core and then said lateral envelope, selected from composite material, is overmolded on said core and at least a portion of said fittings.
  • composite materials means elastomers, EPDM, silicones, etc. and resins, loaded or not (epoxy resin, etc.).
  • the metal of said fittings is such that its melting temperature is of the order of 400 ° C; these are for example zinc, lead, tin, aluminum and their alloys, such as Zamak (R).
  • the fittings are directly overmolded on its ends.
  • the overmolding of the fittings allows the production of a unitary assembly, and the overmolded coating fills the gaps between these bars.
  • This joining of the stack can be carried out for example by thermocompression by inserting a thickness of metal between two faces in contact and by applying high pressure at high temperature. It can also be carried out in a simple manner by casting or injection of metal between the facing faces of the pellets placed in a mold.
  • a core 1 of a varistor type material for example based on zinc oxide.
  • This core has a generally cylindrical shape with axis 4 with two end faces 2 and 3 provided with a metallization layer; it is not necessary that this shape is regular, nor that the faces 2 and 3 are perfectly flat and orthogonal to the axis 4.
  • the metal fittings 5 and 6 are produced by overmolding on the ends of the core 1 , which allows good electrical contact to be obtained between the ends of the core 1 and these fittings.
  • a material chosen from zinc and its alloys, aluminum and its alloys, etc. can be used for these fittings.
  • the core with a total height of approximately 180 mm could be compatible with a nominal operating voltage of 20 kvolts, and with a cross section of approximately 900 mm2, to allow the flow of '' a current wave of more than 40 KAmps for four tenths of a microsecond.
  • the core 1 of FIG. 1 can be formed of several bars of smaller cross section, as appears in FIGS. 2a and 2b where seven bars 10 based on zinc oxide are regularly illustrated around a axis 14.
  • the cross section of the entire these bars is equivalent to the section provided above for a unitary core; the lengths can be substantially the same for the embodiments of FIGS. 1 and 2a.
  • the fittings 15 and 16 are overmolded on the at least partially metallized ends of the bars 10, and then, also by overmolding, the elastomer coating 17 is produced, this material filling the intervals between the bars 10.
  • FIG 3 there is a surge arrester with elements identical to those of Figure 1, except for the central core. It is formed in this variant of a plurality of pellets 21, 22, 23, 24 based on zinc oxide, for example of the same section as the core 1, and whose stacking has the same length as the core 1. This stack is stiffened by a connection of the faces in contact by thermocompression. For this, a very thin thickness of fusible metal is introduced between two pellets. Mechanical compression of the assembly combined with heat treatment makes it possible to obtain a very good mechanical bond.
  • metal is a material with a relatively low melting point like zinc; the pressure is around 1 kg / mm2, and the temperature around 400 ° C.
  • the assembly process continues as for core 1 in FIG. 1.
  • FIG. 4 a variant of connection of the pads 21, 22, 23, 24 is shown to produce the central core.
  • metal melting such as zinc, Zamak (R), or lead, so as to create metallic connections 31, 32, 33. This coating ensures both the electrical contact and the mechanical connection between the pellets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Small-Scale Networks (AREA)
  • Sewing Machines And Sewing (AREA)
  • Elimination Of Static Electricity (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Insulated Conductors (AREA)
EP87118254A 1986-12-12 1987-12-09 Procédé de fabrication d'un parafoudre et parafoudre obtenu par ce procédé Expired - Lifetime EP0274674B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87118254T ATE63399T1 (de) 1986-12-12 1987-12-09 Verfahren zur herstellung eines blitzableiters und durch dieses verfahren hergestellter blitzableiter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8617424 1986-12-12
FR8617424 1986-12-12

Publications (2)

Publication Number Publication Date
EP0274674A1 EP0274674A1 (fr) 1988-07-20
EP0274674B1 true EP0274674B1 (fr) 1991-05-08

Family

ID=9341841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87118254A Expired - Lifetime EP0274674B1 (fr) 1986-12-12 1987-12-09 Procédé de fabrication d'un parafoudre et parafoudre obtenu par ce procédé

Country Status (11)

Country Link
US (1) US4833438A (no)
EP (1) EP0274674B1 (no)
JP (1) JP2628664B2 (no)
AT (1) ATE63399T1 (no)
AU (1) AU592246B2 (no)
BR (1) BR8706753A (no)
CA (1) CA1315963C (no)
DE (1) DE3769955D1 (no)
ES (1) ES2022282B3 (no)
GR (1) GR3002390T3 (no)
NO (1) NO170790C (no)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2649243B1 (fr) * 1989-06-30 1994-04-29 Sediver Ste Europ Isolat Verre Isolateur de ligne a courant alternatif muni d'un eclateur de protection
JP2734661B2 (ja) * 1989-07-25 1998-04-02 株式会社明電舎 避雷器の製造方法
FR2698736B1 (fr) * 1992-11-27 1995-03-17 Soule Sa Perfectionnements aux parafoudres à varistances notamment pour haute tension.
DE4319986A1 (de) * 1993-06-11 1994-12-15 Siemens Ag Überspannungsableiter
SE9303274D0 (sv) 1993-10-07 1993-10-07 Astra Ab Novel phenylethyl and phenylproplamines
US5712757A (en) * 1996-06-27 1998-01-27 Raychem Corporation Surge arrester having ridged terminals
US5680289A (en) * 1996-06-27 1997-10-21 Raychem Corporation Surge arrester
US5757604A (en) * 1996-06-27 1998-05-26 Raychem Corporation Surge arrester having grooved and ridged terminals
US5930102A (en) 1997-10-08 1999-07-27 Joslyn Manufacturing Co. Surge arrester having single surge arresting block
US6519129B1 (en) 1999-11-02 2003-02-11 Cooper Industries, Inc. Surge arrester module with bonded component stack
US6279811B1 (en) 2000-05-12 2001-08-28 Mcgraw-Edison Company Solder application technique
US7015786B2 (en) * 2001-08-29 2006-03-21 Mcgraw-Edison Company Mechanical reinforcement to improve high current, short duration withstand of a monolithic disk or bonded disk stack
US7436283B2 (en) * 2003-11-20 2008-10-14 Cooper Technologies Company Mechanical reinforcement structure for fuses
US8117739B2 (en) * 2004-01-23 2012-02-21 Cooper Technologies Company Manufacturing process for surge arrester module using pre-impregnated composite
US7075406B2 (en) * 2004-03-16 2006-07-11 Cooper Technologies Company Station class surge arrester
US7633737B2 (en) * 2004-04-29 2009-12-15 Cooper Technologies Company Liquid immersed surge arrester
US7660093B2 (en) 2007-11-20 2010-02-09 Hubbell Incorporated Arrester block module assembly and method
US8629751B2 (en) * 2011-12-14 2014-01-14 Tyco Electronics Corporation High amperage surge arresters
WO2015067297A1 (en) * 2013-11-05 2015-05-14 Abb Technology Ltd Surge arrester with moulded sheds and apparatus for moulding
US10741313B1 (en) * 2019-02-06 2020-08-11 Eaton Intelligent Power Limited Bus bar assembly with integrated surge arrestor
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

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB764693A (en) * 1954-01-06 1957-01-02 E M P Electric Ltd Improvements in non-linear resistor elements for lightning arresters
US2885523A (en) * 1954-02-25 1959-05-05 Sprague Electric Co Molded resistors
US3394455A (en) * 1967-03-17 1968-07-30 Westinghouse Electric Corp Method of constructing cast electrical bushings
JPS55175203U (no) * 1979-05-31 1980-12-16
DE3002014A1 (de) * 1980-01-21 1981-07-23 Lev Romanovič Moskva Škundin Einrichtung zum ueberspannungsschutz
CY1295A (en) * 1980-04-08 1985-10-18 Bowthorpe Emp Ltd Surge diverter/arrester
US4444351A (en) * 1981-11-16 1984-04-24 Electric Power Research Institute, Inc. Method of soldering metal oxide varistors
DE3508030A1 (de) * 1985-02-07 1986-08-07 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Verfahren zur herstellung eines ueberspannungsableiters unter verwendung eines aktiven widerstandskoerpers aus einem spannungsabhaengigen widerstandsmaterial auf zno-basis und danach hergestellter ueberspannungsableiter
DE3505862A1 (de) * 1985-02-20 1986-08-21 Siemens AG, 1000 Berlin und 8000 München Varistor und verfahren zu seiner herstellung
DE3670544D1 (de) * 1985-09-02 1990-05-23 Bbc Brown Boveri & Cie Ueberspannungsableiter und verfahren zu seiner herstellung.

Also Published As

Publication number Publication date
US4833438A (en) 1989-05-23
CA1315963C (fr) 1993-04-13
GR3002390T3 (en) 1992-12-30
NO170790C (no) 1992-12-02
BR8706753A (pt) 1988-07-05
AU592246B2 (en) 1990-01-04
NO170790B (no) 1992-08-24
NO875129D0 (no) 1987-12-09
JP2628664B2 (ja) 1997-07-09
NO875129L (no) 1988-06-13
DE3769955D1 (de) 1991-06-13
ATE63399T1 (de) 1991-05-15
JPS63161601A (ja) 1988-07-05
AU8251387A (en) 1988-06-16
EP0274674A1 (fr) 1988-07-20
ES2022282B3 (es) 1991-12-01

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