EP0028281B1 - Synthetic insulating member under mechanical stress with glass fibre reinforcement free of boron and boron compounds for high tension switching arrangements containing sulphur-hexafluorid gas - Google Patents

Synthetic insulating member under mechanical stress with glass fibre reinforcement free of boron and boron compounds for high tension switching arrangements containing sulphur-hexafluorid gas Download PDF

Info

Publication number
EP0028281B1
EP0028281B1 EP80101036A EP80101036A EP0028281B1 EP 0028281 B1 EP0028281 B1 EP 0028281B1 EP 80101036 A EP80101036 A EP 80101036A EP 80101036 A EP80101036 A EP 80101036A EP 0028281 B1 EP0028281 B1 EP 0028281B1
Authority
EP
European Patent Office
Prior art keywords
boron
insulating member
glass fibre
fibre reinforcement
weight
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
EP80101036A
Other languages
German (de)
French (fr)
Other versions
EP0028281A1 (en
Inventor
Hansruedi Dr. Dipl.-Ing.-Chem. Eth Zahner
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.)
Rockwell Automation Switzerland GmbH
Original Assignee
Sprecher und Schuh 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 Sprecher und Schuh AG filed Critical Sprecher und Schuh AG
Priority to AT80101036T priority Critical patent/ATE3481T1/en
Publication of EP0028281A1 publication Critical patent/EP0028281A1/en
Application granted granted Critical
Publication of EP0028281B1 publication Critical patent/EP0028281B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
    • H01B3/087—Chemical composition of glass
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/021—Use of solid insulating compounds resistant to the contacting fluid dielectrics and their decomposition products, e.g. to SF6
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S174/00—Electricity: conductors and insulators
    • Y10S174/01—Anti-tracking
    • 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
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31511—Of epoxy ether
    • Y10T428/31525—Next to glass or quartz
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31616—Next to polyester [e.g., alkyd]

Definitions

  • the invention relates to a mechanically stressed plastic insulating part according to the preamble of claim 1.
  • Such insulating parts such as shift rods, must be able to transmit high, often jerky, forces over longer periods of time without breaking or damage occurring.
  • the known glass fiber reinforced plastic insulating bodies also lose so much strength due to the decomposition products mentioned that they are no longer able to perform the reinforcement function intended for them.
  • the invention has for its object to provide mechanically stressed plastic insulating parts for high-voltage switchgear containing sulfur hexafluoride gas, in which electrical discharges and / or arcs occur at least temporarily, these insulating parts having a high mechanical strength against the decomposition products of SF6 should be sufficiently stable and should be economically advantageous.
  • Such glass fibers are commercially available inexpensively.
  • plastics known per se can be used, for example epoxy resins, polyester resins, silicone resins, polyurethane resins, phenolic resins and melamine resins.
  • Resin compositions are naturally preferred in the production of the insulating parts according to the invention, which have a pot life sufficient for mixing and the best possible shaping at a relatively low viscosity.
  • Known cycloaliphatic epoxy resins are advantageous in this regard when using suitable hardeners.
  • size-free glass fibers are contained in the insulating part according to the invention.
  • Such fibers can e.g. obtained from sized fibers by heat treatment.
  • the initial strength of the insulating parts can be lower than for those with the same but sized glass fibers. This could be due to fiber breakage and thus shorter fiber length.
  • a fragmentary, longitudinally sectioned section of an encapsulation tube 1 is shown, the cavity 2 of which is filled with SF 6 gas, and in which a tubular, hollow shift rod 3 is arranged lengthwise. Detects at the partially cut point of the shift rod 3 one that their wall 4 is a laminate of a glass fiber reinforcement 5 and a plastic 6.
  • two shift rods are provided with a glass fiber reinforcement made of commercially available glass free of boron and boron compounds and low in alkali according to FR-A-1 435073.
  • the fibers of the first shift rod are sized, those of the second shift rod are unsized.
  • a third shift rod is made as a comparison test with a glass fiber reinforcement made of commercially available E-glass, which contains boron and has a normal alkali content.
  • a plastic mixture was prepared for the casting, which contained 100 parts by weight of cycloaliphatic epoxy resin and 80 parts by weight of hexahydrophthalic anhydride.
  • Laminating was carried out by first venting at 100 ° C. under vacuum, then gelling at excess pressure and finally curing at normal pressure and 140 ° C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Insulating Bodies (AREA)
  • Glass Compositions (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Inorganic Insulating Materials (AREA)
  • Insulators (AREA)
  • Laminated Bodies (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Organic Insulating Materials (AREA)

Abstract

The resistance of insulating pieces made of fiberglass reinforced plastics against the decay products of SF6, such as occur within sealed high-voltage switching devices is unexpectedly enhanced by the use of a reinforcing fiberglass made of a low-alkali silicate glass containing neither boron nor boron-compounds.

Description

Die Erfindung betrifft ein mechanisch beanspruchtes Kunststoff-Isolierteil nach dem Oberbegriff des Anspruchs 1.The invention relates to a mechanically stressed plastic insulating part according to the preamble of claim 1.

Derartige Isolierteile, wie Schaltstangen, müssen hohe, oft auch ruckartig auftretende Kräfte über längere Zeitabschnitte übertragen können, ohne dass Bruch oder Beschädigung auftritt.Such insulating parts, such as shift rods, must be able to transmit high, often jerky, forces over longer periods of time without breaking or damage occurring.

Nun ist es aber bekannt, dass Silizium und Bor enthaltende Materialien, wie Porzellan, Quarzsand-Kunststoffteile und glasfaserverstärkte Kunststoffe, durch die Zersetzungsprodukte von SF6 so beeinflusst werden, dass ihr elektrischer Widerstand oft schon nach kurzer Betriebszeit unzulässig abnimmt.However, it is now known that materials containing silicon and boron, such as porcelain, quartz sand plastic parts and glass fiber reinforced plastics, are so affected by the decomposition products of SF6 that their electrical resistance often decreases inadmissibly after a short operating time.

Nach der CH-A-466391 wurde deshalb der Verzicht auf Silizium und Borverbindungen in den lsolierteilen postuliert, wodurch sich der gefürchtete Widerstandsabbau vermeiden lassen soll.According to CH-A-466391, the waiver of silicon and boron compounds in the insulating parts has been postulated, which is to avoid the feared reduction in resistance.

Ohne Faserstoffe, die zwar eine hohe Festigkeit und Elastizität, aber eine geringe elastische Dehnung aufweisen, lassen sich aber z.B. Schaltstangen kaum herstellen. Wollte man auf Glasfasern verzichten, weil sie Silizium und Bor enthalten, müsste auf Produkte ausgewichen werden, die aus Preisgründen wieder ausscheiden.Without fibrous materials, which have a high strength and elasticity, but a low elastic elongation, e.g. Hardly make shift rods. If you wanted to do without glass fibers because they contain silicon and boron, you would have to switch to products that are no longer available for price reasons.

Es ist denn auch nach der DE-A1-2429475 vorgeschlagen worden, die Glasfaser-Kunststoffschicht einer Schaltstange durch eine Schutzschicht aus Kunstoff und organischen Faserstoffen, wie Polyesterfasern, zu schützen. Es hat sich aber gezeigt, dass die gefürchteten Zersetzungsprodukte des Schwefelhexafluorids auch durch solche Schutzschichten diffundieren und die Glasfasern angreifen.It has also been proposed according to DE-A1-2429475 to protect the glass fiber plastic layer of a shift rod by a protective layer made of plastic and organic fiber materials, such as polyester fibers. However, it has been shown that the dreaded decomposition products of the sulfur hexafluoride also diffuse through such protective layers and attack the glass fibers.

Die bekannten glasfaserverstärkten Kunststoff-Isolierkörper verlieren ausserdem durch die genannten Zersetzungsprodukte so erheblich an Festigkeit, dass sie nicht mehr in der Lage sind, die ihnen zugedachte Armierungsfunktion zu erfüllen.The known glass fiber reinforced plastic insulating bodies also lose so much strength due to the decomposition products mentioned that they are no longer able to perform the reinforcement function intended for them.

Bei dem in der DE-A1-25 38 400 beschriebenen, mit einer mechanischen Verstärkung versehenen Kunststoff-Isolierkörper wird eine Glasfaserverstärkung aus Kalziumaluminatglas ohne Silizium-, Bor- und Alkaligehalt vorgeschlagen. Dieses Glas ist gegenüber den Zersetzungsprodukten des Schwefelhexafluorids widerstandsfähig und weist in Verbindung mit dem Kunststoff-Bindemittel eine ausreichende mechanische Festigkeit auf. Diese Lösung ist jedoch wirtschaftlich nachteilig, weil Kalziumaluminatglasfasern relativ teuer sind.In the case of the plastic insulating body described in DE-A1-25 38 400, which is provided with a mechanical reinforcement, glass fiber reinforcement made of calcium aluminate glass without silicon, boron and alkali content is proposed. This glass is resistant to the decomposition products of sulfur hexafluoride and, in conjunction with the plastic binder, has sufficient mechanical strength. However, this solution is economically disadvantageous because calcium aluminate glass fibers are relatively expensive.

Der Erfindung liegt die Aufgabe zugrunde, mechanisch beanspruchte Kunststoff-Isolierteile für Schwefelhexafluorid-Gas enthaltende Hochspannungs-Schaltanlagen, in denen mindestens zeitweise elektrische Entladungen und/oder Lichtbögen auftreten, zu schaffen, wobei diese Isotierteile eine hohe mechanische Festigkeit aufweisen, gegen die Zersetzungsprodukte des SF6 ausreichend beständig sein und wirtschaftlich vorteilhaft sein sollen.The invention has for its object to provide mechanically stressed plastic insulating parts for high-voltage switchgear containing sulfur hexafluoride gas, in which electrical discharges and / or arcs occur at least temporarily, these insulating parts having a high mechanical strength against the decomposition products of SF6 should be sufficiently stable and should be economically advantageous.

Zur Lösung dieser Aufgabe wird ein Kunststoff-Isolierteil nach dem Anspruch 1 vorgeschlagen.To solve this problem, a plastic insulating part is proposed according to claim 1.

Es hat sich nämtich entgegen der Lehre der CH-A-466 391 gezeigt, dass bei Abwesenheit von Bor und dessen Verbindungen ein alkaliarmes Siliziumglas als Material der Verstärkungs-Glasfasern gut geeignet ist, ohne dass der bislang befürchtete starke Abbau des elektrischen Widerstandes und der mechanischen 'Festigkeit durch die Zersetzungsprodukte des SF6 auftritt. Ein gewisser Abbau der genannten Eigenschaften ist zwar nicht ganz auszuschliessen, er wird aber bei erfindungsgemässen Isofierteilen so bescheiden sein, dass deren Betriebstauglichkeit erhalten bleibt.In fact, contrary to the teaching of CH-A-466 391, it has been shown that in the absence of boron and its compounds, a low-alkali silicon glass is well suited as the material of the reinforcing glass fibers, without the previously feared strong reduction in electrical resistance and mechanical '' Strength occurs through the decomposition products of the SF6. A certain degradation of the properties mentioned cannot be ruled out entirely, but it will be so modest in the case of insulating parts according to the invention that their operational suitability is retained.

Als besonders geeignet haben sich Glasfasern nach der FR-A-1 4'35 073 erwiesen, die aus einem Glas bestehen, das aus 50 bis 65 Gew.-% Si02, 20 bis 30 Gew.-% Al2O3, 5 bis 20 Gew.-% MgO und 2 bis 10 Gew.-% CaO besteht, wobei die Gewichtsprozentsumme von CaO und MgO mindestens 15 und höchstens 25, der Quotient der Gewichtsprozente von SiO2 und Al2O3 mindestens 2 und höchstens 2, 8 sowie der Quotient der Gewichtsprozente von IMg O und Si02 höchstens 0,3 beträgt. Derartige Glasfasern sind im Handel preiswert erhältlich.Glass fibers according to FR-A-1 4,335,073, which consist of a glass consisting of 50 to 65% by weight of SiO 2, 20 to 30% by weight of Al 2 O 3 , 5 to, have proven to be particularly suitable 20% by weight of MgO and 2 to 10% by weight of CaO, the weight percentages of CaO and MgO being at least 15 and at most 25, the quotient of the weight percentages of SiO 2 and Al 2 O 3 being at least 2 and at most 2, 8 and the quotient of the weight percent of IMg O and Si02 is at most 0.3. Such glass fibers are commercially available inexpensively.

Als Kunststoff für erfindungsgemässe Isolierteile können an sich bekannte Kunststoffe verwendet werden, beispielsweise Epoxydharze, Polyesterharze, Silikonharze, Polyurethanharze, Phenolharze und Melaminharze. Man wird naturgemäss Harzzusammensetzungen bei der Herstellung der erfindungsgemässen Isolierteile bevorzugen, die eine zum Mischen und möglichst guten Formen ausreichende Topfzeit bei relativ niedriger Viskosität haben. Bekannte cycloaliphatische Epoxydharze sind diesbezüglich bei Verwendung geeigneter Härter vorteilhaft.As a plastic for insulating parts according to the invention, plastics known per se can be used, for example epoxy resins, polyester resins, silicone resins, polyurethane resins, phenolic resins and melamine resins. Resin compositions are naturally preferred in the production of the insulating parts according to the invention, which have a pot life sufficient for mixing and the best possible shaping at a relatively low viscosity. Known cycloaliphatic epoxy resins are advantageous in this regard when using suitable hardeners.

Es kann vorteilhaft sein, wenn schlichtefreie Glasfasern im erfindungsgemässen Isolierteil enthalten sind. Solche Fasern kann man z.B. durch Hitzebehandlung auch aus geschlichteten Fasern erhalten. Allerdings kann beim Verarbeiten schlichtefreier Fasern die Anfangsfestigkeit der Isolierteile niedriger ausfallen als bei solchen mit gleichen aber geschlichteten Glasfasern. Dies könnte auf Brechen von Fasern und somit auf kürzere Faserlänge zurückzuführen sein.It can be advantageous if size-free glass fibers are contained in the insulating part according to the invention. Such fibers can e.g. obtained from sized fibers by heat treatment. However, when processing size-free fibers, the initial strength of the insulating parts can be lower than for those with the same but sized glass fibers. This could be due to fiber breakage and thus shorter fiber length.

Die Erfindung wird nachstehend beispielsweise unter Hinweis auf die rein schematische Zeichnung besprochen.The invention is discussed below, for example with reference to the purely schematic drawing.

Dargestellt ist ein fragmentarer längs geschnittener Abschnitt eines Kapselungsrohres 1, dessen Hohlraum 2 mit SF6-Gas gefüllt ist, und in welchem eine rohrförmige hohle Schaltstange 3 längs angeordnet ist. An der teilweise geschnittenen Stelle der Schaltstange 3 erkennt man, dass ihre Wandung 4 ein Laminat aus einer Glasfaserverstärkung 5 und einem Kunststoff 6 ist.A fragmentary, longitudinally sectioned section of an encapsulation tube 1 is shown, the cavity 2 of which is filled with SF 6 gas, and in which a tubular, hollow shift rod 3 is arranged lengthwise. Detects at the partially cut point of the shift rod 3 one that their wall 4 is a laminate of a glass fiber reinforcement 5 and a plastic 6.

Die Herstellung von drei derartigen Schaltstangen soll nachstehend beispielsweise beschrieben werden.The production of three such shift rods will be described below, for example.

Zwei Schaltstangen werden dabei erfindungsgemäss mit einer Glasfaserverstärkung aus von Bor und Borverbindungen freiem und alkaliarmem handelsüblichen Glas nach der FR-A-1 435073 versehen. Die Fasern der ersten Schaltstange sind geschlichtet, die der zweiten Schaltstange sind ungeschlichtet.According to the invention, two shift rods are provided with a glass fiber reinforcement made of commercially available glass free of boron and boron compounds and low in alkali according to FR-A-1 435073. The fibers of the first shift rod are sized, those of the second shift rod are unsized.

Eine dritte Schaltstange ist als Vergleichsversuch mit einer Glasfaserverstärkung aus handelsüblichem E-Glas gefertigt, das borhaltig ist und normalen Alkaligehalt hat.A third shift rod is made as a comparison test with a glass fiber reinforcement made of commercially available E-glass, which contains boron and has a normal alkali content.

Für den Guss wurde eine Kunststoffmischung vorbereitet, welche 100 Gewichtsteile cycloaliphatisches Epoxydharz und 80 Gewichtsteile Hexahydrophthalsäureanhydrid enthielt.A plastic mixture was prepared for the casting, which contained 100 parts by weight of cycloaliphatic epoxy resin and 80 parts by weight of hexahydrophthalic anhydride.

Man laminierte, indem man vorerst bei 100°C unter Vakuum entlüftete, dann bei Überdruck gelierte und schliesslich bei Normaldruck und 140°C aushärtete.Laminating was carried out by first venting at 100 ° C. under vacuum, then gelling at excess pressure and finally curing at normal pressure and 140 ° C.

Von allen drei Schaltstangen wurden Proben abgetrennt und in einer SF6-Gas-Atmosphäre während hunderten von Stunden bei elektrischen Entladungen behandelt.Samples were separated from all three shift rods and treated in an SF 6 gas atmosphere for hundreds of hours with electrical discharges.

Eine Prüfung der drei Schaltstangen ergab:

  • Die zwei Schaltstangen (erfindungsgemäss) hatten ein gutes Aussehen. Sie waren mechanisch und elektrisch für den normalen Betriebseinsatz geeignet. Dabei hatte die zweite Schaltstange zwar eine geringere Anfangsfestigkeit, aber einen geringeren Festigkeitsverlust.
  • Die dritte Schaltstange mit E-Glas-Faserverstärkung zeigte schon ein zerrüttetes Aussehen und war vollkommen unbrauchbar.
  • Dies zeigt deutlich, dass entgegen den Erwartungen, ein Siliziumglas, welches von Bor und Borverbindungen frei und alkaliarm ist, sich als Glasfaserverstärkung der geschilderten Art für Anlagen der genannten Art eignet. Dies heisst, dass die der früheren Lehre entsprechende Zersetzung nicht im anzunehmenden Masse auftritt. Dabei ist zu beachten, dass die erfindungsgemässen Schaltstangen ihre Betriebstauglichkeit noch behielten, wenn übliche glasfaserverstärkte Kunststoffprodukte vollständig ausgeschieden waren.
An examination of the three shift rods showed:
  • The two shift rods (according to the invention) had a good appearance. They were mechanically and electrically suitable for normal operational use. The second shift rod had a lower initial strength, but a lower loss of strength.
  • The third shift rod with E-glass fiber reinforcement already had a broken appearance and was completely unusable.
  • This clearly shows that, contrary to expectations, a silicon glass which is free of boron and boron compounds and low in alkali is suitable as a glass fiber reinforcement of the type described for systems of the type mentioned. This means that the decomposition corresponding to the previous teaching does not occur to the extent that can be assumed. It should be noted that the shift rods according to the invention still retained their operational suitability when conventional glass fiber reinforced plastic products were completely eliminated.

Claims (4)

1. A synthetic insulating member under mechanical stress with glass fibre reinforcement free of boron and boron compounds, for the interior of encapsulated high tension switching arrangements, containing sulphur hexafluoride gas, in which arrangements electrical discharges and/or arcs occur at least periodically, characterised in that the glass fibre reinforcement consists of a lowalkali silicon-containing glass.
2. Insulating member according to claim 1, characterised in that the glass fibre reinforcement consists of a glas which contains, by weight,
'50 to 65% of SiO2
20 to 30% of Al2O3
'5 to 20°/o MgO
'2 to 10% CaO

the sum of the percentages by weight of CaO and MgO being at least 1'5 and at most 25,
the quotient of the percentages by weight of SiO2 and Al2O3 being at least 2 and at most 2.8 and
the quotient of the percentages by weight of MgO and SiO2 being at most 0.3.
3. Insulating member according to one of Claims 1 to 2, characterised in that an unsized glass fibre reinforcement is provided.
4. Insulating member according to one of claims 1 to 2, characterised in that the insulating member is constructed as a switch operating rod.
EP80101036A 1979-11-05 1980-03-03 Synthetic insulating member under mechanical stress with glass fibre reinforcement free of boron and boron compounds for high tension switching arrangements containing sulphur-hexafluorid gas Expired EP0028281B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80101036T ATE3481T1 (en) 1979-11-05 1980-03-03 MECHANICALLY STRESSED PLASTIC INSULATION PART WITH FIBERGLASS REINFORCEMENT WITHOUT BORON AND BORON COMPOUNDS FOR HIGH VOLTAGE SWITCHGEAR CONTAINING SULFUR HEXAFLUORIDE GAS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH990379A CH640664A5 (en) 1979-11-05 1979-11-05 MECHANICAL STRENGTHENED GLASS FIBER REINFORCED PLASTIC INSULATING PART.
CH9903/79 1979-11-05

Publications (2)

Publication Number Publication Date
EP0028281A1 EP0028281A1 (en) 1981-05-13
EP0028281B1 true EP0028281B1 (en) 1983-05-18

Family

ID=4356939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101036A Expired EP0028281B1 (en) 1979-11-05 1980-03-03 Synthetic insulating member under mechanical stress with glass fibre reinforcement free of boron and boron compounds for high tension switching arrangements containing sulphur-hexafluorid gas

Country Status (6)

Country Link
US (1) US4375527A (en)
EP (1) EP0028281B1 (en)
JP (1) JPS5671227A (en)
AT (1) ATE3481T1 (en)
CH (1) CH640664A5 (en)
DE (1) DE3063238D1 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58501528A (en) * 1981-11-04 1983-09-08 ヘキスト・セラムテック・アクチエンゲゼルシヤフト composite insulator
DE3322149A1 (en) * 1983-06-20 1984-12-20 Siemens AG, 1000 Berlin und 8000 München FITTING FOR INSULATING BODY
US4944975A (en) * 1988-10-03 1990-07-31 E. I. Du Pont De Nemours And Company Composite coil forms for electrical systems
DE19629796C5 (en) * 1996-07-24 2004-12-16 Lapp Insulator Gmbh & Co. Kg Plastic composite insulator with a spiral shield and process for its production
EP1387368B1 (en) * 2002-08-02 2009-11-04 Abb Research Ltd. Solid insulator and method for manufacturing a solid insulator
US20050272989A1 (en) * 2004-06-04 2005-12-08 Medtronic Minimed, Inc. Analyte sensors and methods for making and using them
FR2856055B1 (en) * 2003-06-11 2007-06-08 Saint Gobain Vetrotex GLASS YARNS FOR REINFORCING ORGANIC AND / OR INORGANIC MATERIALS, COMPOSITES COMPRISING SAME AND COMPOSITION USED THEREFOR
FR2879591B1 (en) * 2004-12-16 2007-02-09 Saint Gobain Vetrotex GLASS YARNS FOR REINFORCING ORGANIC AND / OR INORGANIC MATERIALS
US9656903B2 (en) * 2005-11-04 2017-05-23 Ocv Intellectual Capital, Llc Method of manufacturing high strength glass fibers in a direct melt operation and products formed there from
US8338319B2 (en) * 2008-12-22 2012-12-25 Ocv Intellectual Capital, Llc Composition for high performance glass fibers and fibers formed therewith
US8586491B2 (en) 2005-11-04 2013-11-19 Ocv Intellectual Capital, Llc Composition for high performance glass, high performance glass fibers and articles therefrom
US7799713B2 (en) * 2005-11-04 2010-09-21 Ocv Intellectual Capital, Llc Composition for high performance glass, high performance glass fibers and articles therefrom
US7823417B2 (en) * 2005-11-04 2010-11-02 Ocv Intellectual Capital, Llc Method of manufacturing high performance glass fibers in a refractory lined melter and fiber formed thereby
US9187361B2 (en) 2005-11-04 2015-11-17 Ocv Intellectual Capital, Llc Method of manufacturing S-glass fibers in a direct melt operation and products formed there from
USD628718S1 (en) 2008-10-31 2010-12-07 Owens Corning Intellectual Capital, Llc Shingle ridge vent
USD615218S1 (en) 2009-02-10 2010-05-04 Owens Corning Intellectual Capital, Llc Shingle ridge vent
US8252707B2 (en) * 2008-12-24 2012-08-28 Ocv Intellectual Capital, Llc Composition for high performance glass fibers and fibers formed therewith
US10370855B2 (en) 2012-10-10 2019-08-06 Owens Corning Intellectual Capital, Llc Roof deck intake vent
USD710985S1 (en) 2012-10-10 2014-08-12 Owens Corning Intellectual Capital, Llc Roof vent

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1435073A (en) * 1965-03-02 1966-04-15 Verre Textile Soc Du Glass compositions

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069294A (en) * 1954-06-03 1962-12-18 Corning Glass Works Electrical metal oxide resistor having a glass enamel coating
DE1060016B (en) * 1954-09-30 1959-06-25 Calor Emag Elek Zitaets Ag High-voltage circuit breaker with a switching rocker made of synthetic resin and glass fibers
CH466391A (en) * 1965-08-26 1968-12-15 Bbc Brown Boveri & Cie Electrical equipment, in particular encapsulated switchgear, switches, transformers or converters, and methods for their production
US3574104A (en) * 1968-01-24 1971-04-06 Plastigage Corp Glass fiber constructional member
GB1329609A (en) * 1969-09-27 1973-09-12 Tokyo Electric Power Co Composite material of temerred glass insulator for use in electric power transmission lines
DE2429475C3 (en) * 1974-06-20 1984-10-18 Siemens AG, 1000 Berlin und 8000 München Rod or tube made of fiberglass-reinforced plastic for a high-voltage circuit breaker
US3945838A (en) * 1974-08-12 1976-03-23 Owens-Corning Fiberglas Corporation Glass compositions and their fibers
CH601897A5 (en) * 1974-12-20 1978-07-14 Sprecher & Schuh Ag
US4046948A (en) * 1975-04-09 1977-09-06 Ppg Industries, Inc. Acid resistant glass fibers
CH613555A5 (en) * 1977-01-17 1979-09-28 Sprecher & Schuh Ag Solid insulating part, exposed to arcs, in an electric appliance
CH640973A5 (en) * 1978-06-02 1984-01-31 Micafil Ag Method for producing an insulating rod, which is resistant to tension, compression and torsion and has attachment fittings, and a device for carrying out the method
US4199364A (en) * 1978-11-06 1980-04-22 Ppg Industries, Inc. Glass composition
US4251590A (en) * 1979-06-18 1981-02-17 Johns-Manville Corporation High temperature pipe insulation
US4263364A (en) * 1979-12-14 1981-04-21 Eastman Kodak Company Stampable reinforced thermoplastic polyester sheets

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1435073A (en) * 1965-03-02 1966-04-15 Verre Textile Soc Du Glass compositions

Also Published As

Publication number Publication date
DE3063238D1 (en) 1983-07-07
JPS5671227A (en) 1981-06-13
EP0028281A1 (en) 1981-05-13
US4375527A (en) 1983-03-01
ATE3481T1 (en) 1983-06-15
CH640664A5 (en) 1984-01-13

Similar Documents

Publication Publication Date Title
EP0028281B1 (en) Synthetic insulating member under mechanical stress with glass fibre reinforcement free of boron and boron compounds for high tension switching arrangements containing sulphur-hexafluorid gas
DE2650363C2 (en) Composite insulator for high voltage open air applications
EP0585547B1 (en) Refractory fiber containing bodies for construction
CH637907A5 (en) ALKALINE-RESISTANT, SYNTHETIC MINERAL FIBERS.
EP0025461B1 (en) Element for transferring traction forces and use of same as a suspension means for free conductor cables
DE1494209B2 (en)
DE4426927A1 (en) Electrical silicone rubber insulator for high voltage applications
DE2325100B2 (en) Electrically insulating product made of porcelain
DE1496662A1 (en) High melting point fiberglass
EP0092548B1 (en) Composite insulator
CH218012A (en) Glass fiber.
EP0202218B1 (en) Leaf spring
DE524966C (en) Process for the production of weather-resistant high-voltage insulators
AT297114B (en) Isolation arrangement
DE2806663A1 (en) Hardenable resin compsn. for arc extinguishing materials - comprises a polyacetal and an unsatd. polyester resin
DE2039884C3 (en) Leaching method for producing a body made of an alkali borosilicate glass for a secondary emission electrode
DE1465922A1 (en) Plastic insulator for high voltage transmission lines using glass fibers and process for its manufacture
DE1040444B (en) Use of silicate fibers for the production of molded parts with cement as a binding agent
DE808962C (en) Suspension and tension chain insulator for high voltage overhead lines
DE1282122B (en) Process for the manufacture of high voltage insulators
DE102022205236A1 (en) Insulating support
DE8312170U1 (en) Actuating rod or tube for switching devices, in particular disconnectors, housed within a housing filled with SP or an encapsulation
AT121613B (en) High-voltage insulator, especially for horizontal arrangement in overhead lines for electric railways.
EP0652571A1 (en) Electrical cable
DE1859658U (en) SCREEN INSULATOR, IN PARTICULAR STAB ISOLATOR.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19810313

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE DE FR GB IT NL SE

REF Corresponds to:

Ref document number: 3481

Country of ref document: AT

Date of ref document: 19830615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3063238

Country of ref document: DE

Date of ref document: 19830707

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19840228

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19840229

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19840331

Year of fee payment: 5

Ref country code: BE

Payment date: 19840331

Year of fee payment: 5

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19870302

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19870331

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19880303

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19880304

BERE Be: lapsed

Owner name: SPRECHER & SCHUH A.G.

Effective date: 19880331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19881001

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881118

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19881201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19890331

EUG Se: european patent has lapsed

Ref document number: 80101036.4

Effective date: 19881130