EP1166287B1 - Verfahren zur herstellung von überspannungsableiter und überspannungsableiter mit elektrischen varistoren - Google Patents

Verfahren zur herstellung von überspannungsableiter und überspannungsableiter mit elektrischen varistoren Download PDF

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Publication number
EP1166287B1
EP1166287B1 EP00971467A EP00971467A EP1166287B1 EP 1166287 B1 EP1166287 B1 EP 1166287B1 EP 00971467 A EP00971467 A EP 00971467A EP 00971467 A EP00971467 A EP 00971467A EP 1166287 B1 EP1166287 B1 EP 1166287B1
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EP
European Patent Office
Prior art keywords
fact
varistors
coating
composite material
arrestor
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
EP00971467A
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English (en)
French (fr)
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EP1166287A1 (de
Inventor
Mehrdad Hassanzadeh
Frédéric Malpiece
Dominique Mercier
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Grid Solutions SAS
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Areva T&D SAS
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Publication of EP1166287A1 publication Critical patent/EP1166287A1/de
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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
    • H01C7/18—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 comprising a plurality of layers stacked between terminals
    • 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
    • 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
    • Y10T29/49085—Thermally variable
    • 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
    • Y10T29/49087—Resistor making with envelope or housing
    • Y10T29/49096—Resistor making with envelope or housing with winding
    • 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
    • Y10T29/49098—Applying terminal
    • 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
    • Y10T29/49099—Coating resistive material on a base

Definitions

  • the present invention relates to the field of surge arresters.
  • medium-voltage surge arresters typically to electrical networks with a nominal voltage greater than 1 kV effective between phases.
  • Surge arresters are devices designed to be connected between a power line, particularly at medium or high voltage, and earth, to limit the amplitude and duration of overvoltages appearing on the line.
  • overvoltages may be due for example to atmospheric phenomena, such as lightning, or induction phenomena in the conductors.
  • Surge arresters are generally formed by stacking different varistors, most often nowadays by stacking several zinc oxide-based disks, the electrical resistivity of which is highly nonlinear depending on the applied voltage.
  • these varistors pass virtually no current as long as the voltage at their terminals is below a conduction threshold and, on the other hand, pass a very strong current, which can reach several tens of kA, when the voltage applied to their terminals exceeds the above-mentioned conduction threshold.
  • the number of varistors used in the arrester is such that the operating voltage on the power line is less than the conduction threshold of the stack of varistors.
  • the surge arrester can withstand the operating voltage permanently, without significant leakage of current, and allows on the other hand to discharge the very high intensity discharge currents that can appear temporarily on the line in case of surge accidental.
  • GB-A-2 073 965 proposed to make this envelope using a heat-shrinkable material.
  • US-A-4,092,694 and US-A-4,100,588 have proposed placing each varistor in a silicone-based ring and arranging the stack of varistors thus surrounded in a porcelain casing.
  • US-A-2,050,334 has proposed to place a stack of varistors in a porcelain case and to fill the space formed between the porcelain case and the stack of varistors with a filling material.
  • a filling material formed for example of a halogenated compound based on wax.
  • EP-A-0 008 181, EP-A-0 274 674, EP-A-0 231245 and US-A-4,456,942 have proposed to make the envelope surrounding the varistors using a material elastomer, formed especially by overmolding.
  • EP-A-0 274 674 has proposed overmolding a shell of composite material based on elastomer, EPDM, silicone, or other resin loaded or not, on a stack of varistors.
  • US-A-4 161 012 has also proposed to have an elastomeric casing on the varistors.
  • This document proposes to make this envelope by depositing the elastomer on the outer surface of the varistors, or by molding the casing on the varistors, or by preforming the elastomer casing, and then inserting the varistors into it. .
  • US-A-3 586 934 has proposed to make the envelope using a synthetic resin, for example based on epoxy or polyester, or a silicone or polyester varnish.
  • EP-A-0 196 370 proposes to make the casing on a body of varistors by casting a synthetic resin formed for example of epoxy resin, polymer concrete, silicone resin, or an elastomer, or covering the body of varistors with a plastic shrinkable tube, or by providing this stack with a layer of synthetic resin.
  • a synthetic resin formed for example of epoxy resin, polymer concrete, silicone resin, or an elastomer, or covering the body of varistors with a plastic shrinkable tube, or by providing this stack with a layer of synthetic resin.
  • US-A-4,656,555 has proposed firstly forming a winding of plastic-based fibers, such as polyethylene, or glass, or possibly ceramic impregnated with resin, for example epoxy, then form on the outside of this winding a weather-resistant polymer material housing, for example based on elastomeric polymers, synthetic rubber, thermoplastic elastomers or EPDM.
  • plastic-based fibers such as polyethylene, or glass, or possibly ceramic impregnated with resin, for example epoxy
  • This document proposes more precisely either to preform the weather-resistant polymer housing, then to engage the stack of varistors provided with the winding of fibers in this housing, or to initially form the winding of fibers on the stack of varistors, then to realize the housing of weather-resistant polymeric material, by molding on the winding, spraying polymer on the winding or insertion of the stack of varistors provided with the winding in a polymer bath.
  • US-A-4 404 614 has proposed to arrange successively on a stack of varistors a first envelope based on glass fibers impregnated with resin, for example epoxy resin, then a second envelope based on glass flakes and epoxy resin, and finally an elastic outer shell based on EPDM rubber, or butyl rubber.
  • resin for example epoxy resin
  • EPDM rubber or butyl rubber
  • first envelope, the second envelope and the outer envelope can be put in place successively on the stack of varistors, or the envelopes can be formed in a reverse order.
  • EP-A-0 233 022 has proposed forming on a stack of varistors a shell based on glass fibers reinforced with epoxy resin, then a heat-shrinkable envelope, or can be released by equivalent mechanical means on said shell, to elastomer base.
  • the casing may be molded in situ based on synthetic resin or polymeric material.
  • the document indicates that the shell can be preformed. This document also proposes to use a web of pre-impregnated fibers.
  • the document EP-A-0 304 690 proposes firstly to produce a filament winding of glass fibers impregnated with resin, then to form on the outside of the winding a coating of elastomer material of the EPDM type, by injection.
  • the document EP-A-0 355 479 proposes to place successively on the stack of varistors, first of all a barrier formed of a plastic film, for example based on propylene, then a winding of non-conductive filaments, and finally a weatherproof elastomer housing.
  • EP-A-0 397 163 proposed to place successively on the stack of varistors a filament winding impregnated with resin, then to form on this winding a finned coating, elastomer, for example EPDM, by injection.
  • a method of manufacturing a surge arrester comprising the steps of stacking varistors, forming a first envelope of composite material, on the stack of varistors, which first envelope at least semi-rigid present a constant outer section, over its length, compensating in particular for the surface unevenness of the stack of varistors due to misalignment and dispersion of the dimensions of varistors and placing an outer fin envelope on the first composite material by extruding a substantially constant outer casing on the first casing, and then returning annular fins to the extruded outer casing.
  • Enameling varistors has so far been considered essential to improve the dielectric strength and incidentally constitute a chemical barrier to their immediate environment.
  • enamelling which generally comprises a high proportion of lead, typically greater than 50%, leads to a major risk of environmental pollution, if precautions, inevitably costly, are not taken at the manufacturing level. , recovery and / or recycling of used arresters.
  • enamelling which can only be achieved before stacking, therefore individually varistor varistor, is a significant part of the overall cost of current surge arresters.
  • the Applicant proposes, by the present invention, to improve the existing surge arresters.
  • a main object of the present invention is to produce reliable surge arresters based on varistors, without requiring enamelling.
  • a more incidental object of the present invention is to further reduce the cost of known surge arresters.
  • the present invention also relates to surge arresters obtained by the implementation of the aforementioned method.
  • the bonding / sealing agent 30 deposited on the interfaces of the stack of varistors 10 is a flexible, adhesive and dielectric material. It is advantageously an elastomer or a gel, for example based on silicone or equivalent.
  • the varistors 10 are unglazed varistors.
  • unglazed varistors 10 is made possible, in the context of the present invention, by the addition of this specific material 30 at the level of the peripheral junctions of varistors 10, said material 30 making it possible at the same time to guarantee good dielectric withstand (glue function) and total absence of axial partial discharge (sealing function).
  • the varistors 10 can include a thin enamel protective film intended to protect the varistors during the manufacturing process of the surge arrester, in particular in order to avoid any pollution of the varistors during the perfume manufacturing process.
  • the conventional enamel layers typically have a thickness of the order of 100 .mu.m.
  • Such a protective film according to the present invention may typically have a thickness in the range of 1 ⁇ 2 to 1/3 of this conventional thickness.
  • the protective film may be removable, that is to say removed, once the risks of pollution become non-existent during the manufacturing process.
  • the protective film is made of a material free of lead.
  • each silicone sealant bead 30 has an axial width of about 5 mm and a comparable thickness, preferably less than 5 mm.
  • the cords 30 are preferably deposited in the form of a single turn into a one-component silicone mastic, necessarily compatible with the material of the varistors 10 formed very advantageously based on zinc oxide.
  • the material does not contain acetic acid.
  • the material constituting the cords 30 is formed of a silicone sealant marketed by the company Dow Corning under the reference 7091.
  • This silicone sealant has excellent adhesion without primary and neutral polymerization base.
  • This silicone sealant allows a temperature range of -55 ° C to + 150 ° C, and it has an elongation of 500% and a dielectric strength of 16 kV per mm.
  • the ribbon 40 of preimpregnated fabric wound preferably at 45 ° with an overlap of 50% preferably has a resin content of between one third and one half by weight.
  • the preimpregnated fabric tape 40 consists of a fabric whose mass content of resin is of the order of 35% has a nominal mass of 470. g / m 2 and a reinforcing structure based on glass fibers having a nominal mass of 305 g / m 2 in a satin-like structure 8.
  • the bonding / sealing agent forming the cords 50 deposited on the composite tape 40 may be formed of the same material, preferably silicone mastic or equivalent, that used to make the cords 30 and described above.
  • the material 50 is chosen to have properties of lubricant, adhesive, dielectric, and filler, in order to facilitate the engagement of the outer shell 60, to adhere perfectly thereto, to provide dielectric functions, and to perform perfectly the interface between the composite coating 40 and the outer casing 60.
  • the material 50 deposited on the composite coating 40 may optionally be placed in a helix. However, as illustrated in FIG. 3, the material 50 is preferably deposited in the form of annular beads.
  • the material 50 is deposited preferably with the aid of several nozzles or a nozzle 32 fixed in rotation but cyclically displaced axially with a pitch equal to the distance separating two cords 50, and rotating the preformed assembly surge arrester around the axis 12.
  • cords 50 are deposited respectively at the two ends of the stack to ensure a complete filling of the surface irregularities between the composite tape 40 and the outer shell 60, over the entire length of the surge arrester, as well as to guarantee a perfect seal of the arrester.
  • the outer shell 60 of elastomer is an outer annular fin envelope for extending the creepage line on the outside of the arrester.
  • the number of fins and their profile and spacing may vary depending on the requirements for resistance to pollution, and of course the nominal voltage surge arrester.
  • annular fins are characterized by zones of greater rigidity at its fins.
  • outer casing 60 as a molding mold by radial compression of the body of the surge arrester during the polymerization step of the prepreg ribbon resin 40 provides a perfect adhesion between the different layers of internal materials and allows both to guarantee a good seal and the absence of partial radial discharge for the device.
  • this polymerization step is carried out under axial compression at a temperature of the order of 130 ° C. and for a duration of the order of 1 hour.
  • the ribbon 40 of glass fiber fabric pre-impregnated with synthetic resin may be deposited on the stack of varistors 10 provided with beads 30 of silicone putty, not in a helix, but in the form of rings placed opposite of the interface between each pair of adjacent varistors.
  • the resulting assembly is preferably further provided with an outer casing having a good dielectric strength, for example based on a silicone overmoulding, or of an envelope deposited by expansion and then retraction, or a heat-shrinkable envelope.
  • the ribbon 40 of preimpregnated fabric can be deposited both in the form of rings opposite the connection interfaces between each pair of adjacent varistors, then a superimposed helix as shown in FIG. 2.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Insulating Bodies (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)

Claims (26)

  1. Verfahren zum Herstellen von Überspannungsableitern, mit den Schritten, die darin bestehen,
    - Varistoren (10) zu stapeln und
    - eine Ummantelung (40) aus Verbundmaterial an der Stapelung von Varistoren (10) auszubilden,
    dadurch gekennzeichnet, dass:
    - zwischen den Schritten der Stapelung und der Ausbildung der Ummantelung aus Verbundmaterial (40) das Verfahren einen Schritt umfasst, der darin besteht, eine Litze (30) aus weichem, dielektrischem Haftmaterial an die zuvor gebildete Stapelung, den verschiedenen Schnittstellen zwischen jedem Paar von aneinandergrenzenden Varistoren gegenüberliegend anzuordnen.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Litzen (30) aus weichem, dielektrischem Haftmaterial auf Basis von Elastomer oder eines Gels, vorzugsweise aus Silikonmaterial hergestellt sind.
  3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass jede Litze (30) eine Breite typischerweise von 5 mm und eine Dicke unter 5 mm besitzt.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das die Litzen (30) bildende Material frei von Essigsäure ist.
  5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass es ferner einen Schritt umfasst, der darin besteht, eine Außenhülle (60) auf die Ummantelung (40) aus Verbundmaterial aufzubringen und diese Außenhülle (60) unter radialem Druck als Gießform für den Überspannungsableiterkörper bei einem Polymerisierungsschritt zu verwenden.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass die Außenhülle (60) ringförmige Rippen enthält.
  7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass es ferner einen Schritt umfasst, der darin besteht, Litzen aus einem Klebe-/Dichtmittel (50) auf die Ummantelung aus Verbundmaterial (40) vor Anbringen der Außenhülle (60) aufzubringen.
  8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass die auf die Ummantelung aus Verbundmaterial (40) aufgebrachten Litzen (50) aus Klebe-/Dichtmittel aus Silikonmasse hergestellt werden.
  9. Verfahren nach einem der Ansprüche 7 oder 8, dadurch gekennzeichnet, dass die auf die Ummantelung aus Verbundmaterial (40) aufgebrachten Litzen (50) aus Klebe-/Dichtmittel ringförmig angeformt werden.
  10. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Ummantelung aus Verbundmaterial (40) wendelförmig aufgewickelt wird.
  11. Verfahren nach eine der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die Ummantelung aus Verbundmaterial (40) durch wendelförmige Aufwicklung eines vorimprägnierten Webbandes mit 50%-iger Überlappung hergestellt wird.
  12. Verfahren nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die Ummantelung aus Verbundmaterial (40) Ringe aus vorimprägniertem Webband enthält, die den Schnittstellen zwischen zwei Paaren von aneinandergrenzenden Varistoren (10) gegenüberliegend angebracht werden.
  13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass der Überspannungsableiter mit einer Hülle ergänzt ist, die auf die Ummantelung aus Verbundmaterial (40) aufgebracht ist, um das dielektrische Verhalten des Überspannungsableiters zu verstärken.
  14. Verfahren nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass die Ummantelung aus Verbundmaterial (40), die vorzugsweise auf Basis von Glasfasern und Epoxydharz gebildet ist, einen Harzgehalt in Masse zwischen einem Drittel und der Hälfte aufweist.
  15. Verfahren nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass die Ummantelung aus Verbundmaterial (40) unter axialem Druck der Stapelung von Varistoren (10) hergestellt wird.
  16. Verfahren nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass die Varistoren (10) nicht emailliert werden.
  17. Verfahren nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass die Varistoren (10) mit einem feinen Schutzfilm aus bleifreiem Email überzogen werden.
  18. Überspannungsableiter mit einer Stapelung von Varistoren (10) und einer Ummantelung aus Verbundmaterial (40), dadurch gekennzeichnet, dass er ferner Litzen (30) aus weichem, dielektrischem Haftmaterial an der Stapelung von Varistoren, den verschiedenen Schnittstellen zwischen jedem Paar von aneinandergrenzenden Varistoren (10) gegenüberliegend, enthält.
  19. erspannungsableiter nach Anspruch 18, dadurch gekennzeichnet, dass die Litzen (30) aus weichem, dielektrischem Haftmaterial auf Basis von Silikonmaterial gebildet sind.
  20. Überspannungsableiter nach einem der Ansprüche 18 oder 19, dadurch gekennzeichnet, dass er ferner eine Außenhülle (60) mit ringförmigen Rippen enthält.
  21. Überspannungsableiter nach einem der Ansprüche 18 bis 20, dadurch gekennzeichnet, dass er ferner Litzen (50) aus einem Klebe-/Dichtmittel zwischen der Ummantelung aus Verbundmaterial (40) und der Außenhülle (60) enthält.
  22. Überspannungsableiter nach Anspruch 21, dadurch gekennzeichnet, dass die auf die Ummantelung aus Verbundmaterial (40) aufgebrachten Litzen (50) aus Klebe-/Dichtmittel aus Silikonmasse hergestellt sind.
  23. Überspannungsableiter nach einem der Anspräche 18 bis 22, dadurch gekennzeichnet, dass die Ummantelung aus Verbundmaterial (40) durch wendelförmige Aufwicklung eines vorimprägnierten Webbandes mit 50%-iger Überlappung hergestellt ist.
  24. Überspannungsableiter nach einem der Ansprüche 18 bis 23, dadurch gekennzeichnet, dass die Ummantelung aus Verbundmaterial (40) einen Harzgehalt in Masse zwischen einem Drittel und der Hälfte aufweist.
  25. Überspannungsableiter nach einem der sprüche 18 bis 24, dadurch gekennzeichnet, dass die Varistoren (10) nicht emailliert sind.
  26. Überspannungsableiter nach einem der Ansprüche 18 bis 24, dadurch gekennzeichnet, dass die Varistoren (10) mit einem feinen Schutzfilm aus bleifreiem Email überzogen sind.
EP00971467A 1999-10-25 2000-10-20 Verfahren zur herstellung von überspannungsableiter und überspannungsableiter mit elektrischen varistoren Expired - Lifetime EP1166287B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9913270A FR2800903B1 (fr) 1999-10-25 1999-10-25 Parafoudre perfectionne a base de varistances electriques
FR9913270 1999-10-25
PCT/FR2000/002930 WO2001031661A1 (fr) 1999-10-25 2000-10-20 Parafoudre perfectionne a base de varistances electriques

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EP1166287A1 EP1166287A1 (de) 2002-01-02
EP1166287B1 true EP1166287B1 (de) 2006-12-13

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Country Status (14)

Country Link
US (1) US7272885B2 (de)
EP (1) EP1166287B1 (de)
CN (1) CN1267940C (de)
AT (1) ATE348393T1 (de)
AU (1) AU1031701A (de)
BR (1) BR0007455A (de)
CA (1) CA2356383C (de)
DE (1) DE60032345D1 (de)
ES (1) ES2278636T3 (de)
FR (1) FR2800903B1 (de)
PT (1) PT1166287E (de)
TR (1) TR200101835T1 (de)
WO (1) WO2001031661A1 (de)
ZA (1) ZA200104867B (de)

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US8117739B2 (en) * 2004-01-23 2012-02-21 Cooper Technologies Company Manufacturing process for surge arrester module using pre-impregnated composite
US7653371B2 (en) 2004-09-27 2010-01-26 Qualcomm Mems Technologies, Inc. Selectable capacitance circuit
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
FR2907365B1 (fr) * 2006-10-20 2011-07-22 Astrium Sas Dispositif et procede de bobinage filamentaire de tubes de grande longueur et tubes de grande longueur realises par ce procede.
BR112018069972A8 (pt) 2016-09-28 2022-12-27 Hitachi Energy Switzerland Ag Para-raios e método de fabricação associado
CN108439982B (zh) * 2018-05-14 2021-06-15 济南大学 一种轴向复合负温度系数热敏陶瓷材料及其制备方法
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Also Published As

Publication number Publication date
EP1166287A1 (de) 2002-01-02
ATE348393T1 (de) 2007-01-15
ZA200104867B (en) 2002-06-14
CA2356383C (fr) 2009-01-20
TR200101835T1 (tr) 2002-04-22
BR0007455A (pt) 2001-10-30
US7272885B2 (en) 2007-09-25
AU1031701A (en) 2001-05-08
PT1166287E (pt) 2007-02-28
CA2356383A1 (fr) 2001-05-03
ES2278636T3 (es) 2007-08-16
CN1327598A (zh) 2001-12-19
FR2800903A1 (fr) 2001-05-11
DE60032345D1 (de) 2007-01-25
FR2800903B1 (fr) 2001-12-21
US20040111867A1 (en) 2004-06-17
CN1267940C (zh) 2006-08-02
WO2001031661A1 (fr) 2001-05-03

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