EP0163873B1 - Diélectrique en verre pour isolateur électrique - Google Patents

Diélectrique en verre pour isolateur électrique Download PDF

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Publication number
EP0163873B1
EP0163873B1 EP85104627A EP85104627A EP0163873B1 EP 0163873 B1 EP0163873 B1 EP 0163873B1 EP 85104627 A EP85104627 A EP 85104627A EP 85104627 A EP85104627 A EP 85104627A EP 0163873 B1 EP0163873 B1 EP 0163873B1
Authority
EP
European Patent Office
Prior art keywords
dielectric
glass
insulator
maximum value
mpa
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
Application number
EP85104627A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0163873A1 (fr
Inventor
Denis Dumora
Jean-Paul Parant
Laurent Pargamin
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 AT85104627T priority Critical patent/ATE45241T1/de
Publication of EP0163873A1 publication Critical patent/EP0163873A1/fr
Application granted granted Critical
Publication of EP0163873B1 publication Critical patent/EP0163873B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/14—Supporting insulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/20—Pin insulators
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31—Surface property or characteristic of web, sheet or block
    • Y10T428/315—Surface modified glass [e.g., tempered, strengthened, etc.]

Definitions

  • the present invention relates to a glass electrical insulator and in particular to a high or medium voltage distribution insulator, where soda-lime glass dielectrics are generally used, either annealed or highly thermally toughened.
  • severe conditions are required, among which: good resistance to sudden temperature differences of the order of at least 70 ° C., and sufficient resistance to accidental impacts.
  • the annealed glass dielectrics do not meet the aforementioned temperature condition and their impact resistance is insufficient.
  • the dielectrics in highly thermally tempered glass resist abrupt variations in temperature much greater than 100 ° C. and exhibit very good impact resistance because they have very high surface stresses.
  • a glass of this kind the thickness of which is of the order of 10 to 15 mm, presents transversely to its thickness a substantially parabolic profile of constraints: the surface compression constraints can reach several hundred Megapascales, the constraints internal extension being very close to half of the compression stresses.
  • a total fragmentation of the dielectric is observed.
  • the object of the present invention is to produce a dielectric which does not have this drawback, while meeting the other requirements mentioned above.
  • the subject of the present invention is a rigid insulator comprising a plurality of dielectric pieces joined together, the lower insulator being fixed to a metal rod and comprising at least one dielectric piece made of soda-lime glass with an average thickness of 10 to 15 mm and having a substantially parabolic stress profile, at any point in the part, the maximum value of the surface compression constraints being between 30 and 80 MPa, while the maximum value of the internal stresses of extension is between 15 and 40 MPa.
  • the present invention also relates to a rigid insulator comprising a plurality of dielectric pieces stacked on each other so as to form a column and immobilized between them on a base, at least one of said dielectric pieces made of glass as indicated below. -above.
  • FIG. 1 shows a dielectric 1 according to the invention, the head 2 of which has grooves 3 and 4 capable of supporting a conductor of an overhead line.
  • This dielectric is made of soda-lime glass and its average thickness is of the order of 10 to 15 mm.
  • Figure 2 the transverse distribution of the stresses existing in this glass. The values of the stresses C in Megapascals are shown on the ordinate and the thickness e in millimeters on the abscissa.
  • Profile A of the constraints is parabolic. This profile corresponds to the ideal case where the portion of glass slide studied has its two parallel faces.
  • the A values of surface compression stresses can be measured by the method of D. B. MARSHAL; and B. R. LAWN described in "the Journal of the Ceramic Society Feb. 77. Vol 60 no 1 - 2".
  • the maximum value of the external compression constraints is 60 Megapascals, while the maximum value of the internal extension constraints is 30 Megapascals.
  • Such a dielectric withstands sudden temperature differences of at least 90 ° C. It has an impact resistance at least three times that of annealed glass. Even in the event of an impact leading to rupture, no fragmentation of the dielectric is observed.
  • FIGS. 3 and 4 Two very advantageous uses of the dielectrics according to the invention have been illustrated in FIGS. 3 and 4.
  • FIG. 3 illustrates a rigid rod insulator fixed in a support 15. It comprises a first dielectric 11, similar to that of FIG. 1, and provided with two grooves 13 and 14; a second dielectric 12 having the same stress characteristics is secured to the dielectric 11.
  • a metal rod 16 fixed in the head of the dielectric 12 allows immobilization of the insulator 10 in the support 15.
  • the dielectrics according to the invention can present when they undergo an impact whose energy is greater than their prestressing: instead of a total fragmentation of the dielectrics, there appears a sharp break of one or two pieces of their skirts, and the cable continues to be fixed correctly on the head of the insulator 10.
  • a rigid insulator 20 mounted on a metal base 21 fixed on a support 22.
  • This insulator 20 is formed of a plurality of dielectrics 30 according to the invention stacked, sealed one inside the other so as to form a column.
  • the head of the upper dielectric 31 has two grooves 33 and 34 for an overhead line conductor. In this type of application, a fragmentation of two successive dielectrics would risk causing the conductor to fall.
  • the present invention solves this problem.

Landscapes

  • Inorganic Insulating Materials (AREA)
  • Insulating Bodies (AREA)
  • Glass Compositions (AREA)
  • Insulators (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)
  • Electronic Switches (AREA)
EP85104627A 1984-04-20 1985-04-18 Diélectrique en verre pour isolateur électrique Expired EP0163873B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85104627T ATE45241T1 (de) 1984-04-20 1985-04-18 Dielektrikum aus glas fuer elektrischen isolator.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8406301 1984-04-20
FR8406301A FR2563365B1 (fr) 1984-04-20 1984-04-20 Dielectrique en verre pour isolateur electrique

Publications (2)

Publication Number Publication Date
EP0163873A1 EP0163873A1 (fr) 1985-12-11
EP0163873B1 true EP0163873B1 (fr) 1989-08-02

Family

ID=9303372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85104627A Expired EP0163873B1 (fr) 1984-04-20 1985-04-18 Diélectrique en verre pour isolateur électrique

Country Status (13)

Country Link
US (1) US4757162A (no)
EP (1) EP0163873B1 (no)
AT (1) ATE45241T1 (no)
AU (1) AU581653B2 (no)
BR (1) BR8501888A (no)
CA (1) CA1255768A (no)
DE (1) DE3572073D1 (no)
FR (1) FR2563365B1 (no)
IN (1) IN168791B (no)
MX (1) MX158952A (no)
NO (1) NO165898C (no)
NZ (1) NZ211795A (no)
ZA (1) ZA852957B (no)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9593042B2 (en) 2014-10-08 2017-03-14 Corning Incorporated Glasses and glass ceramics including a metal oxide concentration gradient
US9908811B2 (en) 2015-12-11 2018-03-06 Corning Incorporated Fusion formable glass-based articles including a metal oxide concentration gradient
US10017417B2 (en) 2016-04-08 2018-07-10 Corning Incorporated Glass-based articles including a metal oxide concentration gradient

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100910417B1 (ko) 2008-02-14 2009-08-04 삼광유리공업주식회사 내열 강화 유리 애자 및 그 제조방법
CN101409119B (zh) * 2008-11-18 2010-10-27 上海玻璃机器制造厂有限公司 一种叠层钢化玻璃绝缘子及制备方法
FR2964655B1 (fr) * 2010-09-13 2017-05-19 Saint Gobain Feuille de verre
US9359251B2 (en) 2012-02-29 2016-06-07 Corning Incorporated Ion exchanged glasses via non-error function compressive stress profiles
US11079309B2 (en) 2013-07-26 2021-08-03 Corning Incorporated Strengthened glass articles having improved survivability
US10118858B2 (en) 2014-02-24 2018-11-06 Corning Incorporated Strengthened glass with deep depth of compression
US9941035B2 (en) * 2014-04-04 2018-04-10 Mitsubishi Electric Corporation Insulating support for electric device
TWI773291B (zh) 2014-06-19 2022-08-01 美商康寧公司 無易碎應力分布曲線的玻璃
US10150698B2 (en) 2014-10-31 2018-12-11 Corning Incorporated Strengthened glass with ultra deep depth of compression
CN115536270A (zh) 2014-11-04 2022-12-30 康宁股份有限公司 深层非易碎应力曲线及其制造方法
US11613103B2 (en) 2015-07-21 2023-03-28 Corning Incorporated Glass articles exhibiting improved fracture performance
US9701569B2 (en) 2015-07-21 2017-07-11 Corning Incorporated Glass articles exhibiting improved fracture performance
KR20200091500A (ko) 2016-04-08 2020-07-30 코닝 인코포레이티드 두 영역을 포함하는 응력 프로파일을 포함하는 유리-계 물품, 및 제조 방법

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2344630A (en) * 1939-11-25 1944-03-21 Hartford Empire Co Method of tempering glassware
FR1138304A (fr) * 1954-07-26 1957-06-12 Pilkington Brothers Ltd Perfectionnements apportés aux isolateurs en verre trempé
GB846467A (en) * 1956-10-05 1960-08-31 Nat Res Dev Method of and apparatus for prestressing glass articles
NL298724A (no) * 1962-10-04
FR1516160A (fr) * 1967-01-25 1968-03-08 Europ D Isolateurs En Verre Re Perfectionnements aux isolateurs-supports à éléments emboîtés
FR1559006A (no) * 1967-12-22 1969-03-07
GB1556051A (en) * 1975-08-29 1979-11-21 Pilkington Brothers Ltd Thermal treatment of glass
FR2515634A1 (fr) * 1981-10-29 1983-05-06 Ceraver Procede de fabrication d'un dielectrique en verre pour isolateur electrique et dielectrique en resultant
FR2515635B1 (fr) * 1981-10-29 1986-03-14 Ceraver Procede de fabrication d'un dielectrique en verre trempe pour isolateur electrique et isolateur en resultant

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
"At a glance inspection" de la Société SEDIVER-CERAVER S.A., Commercial Department, Paris *
ANSI C29.2-1983, American National Standards Institute, Inc., New York, N.Y., US: "Insulators wet-process porcelain and toughened glass-suspension type" *
ANSI C29.6-1984, American National Standards Institute, Inc., New York, N.Y., US: "High-voltage pin type" *
ANSI C29.7-1983, American National Standards Institute, Inc., New York, N.Y., US: "High-voltage line-post type" *
INFOVER, une brochure de la Société SEDIVER-CERAVER S.A., Commercial Department, Paris *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9593042B2 (en) 2014-10-08 2017-03-14 Corning Incorporated Glasses and glass ceramics including a metal oxide concentration gradient
US10259746B2 (en) 2014-10-08 2019-04-16 Corning Incorporated Glasses and glass ceramics including a metal oxide concentration gradient
US10266447B2 (en) 2014-10-08 2019-04-23 Corning Incorporated Glasses and glass ceramics including a metal oxide concentration gradient
US10294151B2 (en) 2014-10-08 2019-05-21 Corning Incorporated Glasses and glass ceramics including a metal oxide concentration gradient
US10730791B2 (en) 2014-10-08 2020-08-04 Corning Incorporated Glasses and glass ceramics including a metal oxide concentration gradient
US9908811B2 (en) 2015-12-11 2018-03-06 Corning Incorporated Fusion formable glass-based articles including a metal oxide concentration gradient
US10787387B2 (en) 2015-12-11 2020-09-29 Corning Incorporated Fusion-formable glass-based articles including a metal oxide concentration gradient
US10017417B2 (en) 2016-04-08 2018-07-10 Corning Incorporated Glass-based articles including a metal oxide concentration gradient
US10570059B2 (en) 2016-04-08 2020-02-25 Corning Incorporated Glass-based articles including a metal oxide concentration gradient

Also Published As

Publication number Publication date
IN168791B (no) 1991-06-08
US4757162A (en) 1988-07-12
MX158952A (es) 1989-03-31
CA1255768A (fr) 1989-06-13
BR8501888A (pt) 1985-12-24
FR2563365A1 (fr) 1985-10-25
AU581653B2 (en) 1989-03-02
ATE45241T1 (de) 1989-08-15
NZ211795A (en) 1989-01-06
FR2563365B1 (fr) 1986-12-05
DE3572073D1 (en) 1989-09-07
NO165898B (no) 1991-01-14
NO165898C (no) 1991-04-24
AU4129785A (en) 1985-10-24
EP0163873A1 (fr) 1985-12-11
NO851545L (no) 1985-10-21
ZA852957B (en) 1985-12-24

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