EP0762434B1 - Apparatus useful as an electrical insulation - Google Patents
Apparatus useful as an electrical insulation Download PDFInfo
- Publication number
- EP0762434B1 EP0762434B1 EP96113144A EP96113144A EP0762434B1 EP 0762434 B1 EP0762434 B1 EP 0762434B1 EP 96113144 A EP96113144 A EP 96113144A EP 96113144 A EP96113144 A EP 96113144A EP 0762434 B1 EP0762434 B1 EP 0762434B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shielding
- shield
- insulating device
- insulating
- electrically conductive
- 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
Links
- 238000010292 electrical insulation Methods 0.000 title description 4
- 239000003822 epoxy resin Substances 0.000 claims description 10
- 229920000647 polyepoxide Polymers 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000012212 insulator Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/40—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes epoxy resins
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
-
- 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
- H01B17/56—Insulating bodies
- H01B17/64—Insulating bodies with conductive admixtures, inserts or layers
Definitions
- the above invention relates to a device for electrical insulation consisting of a body insulating material, e.g. Epoxy resin and one Shielding consisting of electrically conductive material and Epoxy resin. It is envisaged that the shielding in the Body of the isolation device is embedded.
- a body insulating material e.g. Epoxy resin
- Shielding consisting of electrically conductive material and Epoxy resin. It is envisaged that the shielding in the Body of the isolation device is embedded.
- Isolators There are already facilities for electrical Insulation, e.g. for isolators on in the field of medium voltage.
- This Isolators have one or more shields that usually from a mesh or grid made of metal consist.
- the known insulators have the disadvantage that the Manufacture from a mesh or grid existing shielding is to be carried out by hand and therefore considerable manufacturing costs arise.
- the known shields can be considerable Dimensional deviations between the body of the insulator and the known shield, consisting of a metal mesh, be determined. Furthermore, the known shields unwanted fraying the Metal network from which the well-known shield consists, what to an undesirable local increase in electrical Field leads.
- the object of the above invention is a device to create electrical insulation which the Disadvantages of the prior art does not have and rational way, advantageously using automatic devices can be mass-produced, to the manufacturing disadvantages, as well as the previously to avoid rejects that have occurred and further improved uniformity from electrical engineering View for the shielding and an insulation device too create one together with the shielding device forms a unified body.
- This task is done by an electrical Isolation device created from a body insulating material such as synthetic resin, and the body receives a shield made of conductive material and characterized in that the shield made of epoxy resin exists, which is enriched with soot particles and the Shielding makes it electrically conductive.
- the shielding in a desired proportion Made way electrically conductive.
- both the insulator and the shield be made using the same resin it is possible to have a uniformly trained To create insulating bodies.
- the insulating body designed according to the invention has furthermore the advantage that the component of the shield can be produced automatically and in series advantageously by a casting / pressing process.
- the shape of the shielding can easily be attached to the predetermined shape of the insulating body or vice versa be adjusted. Furthermore, an undesirable, local Increase in the electric field as so far along the inevitable fraying of a metal mesh existing shielding occurred.
- this used synthetic resin to create the insulating body features similar to the resin composition are used for the electrically conductive shielding will, and because of this, undesirable disconnection avoided between the shield and the insulating body.
- the shield advantageously has a tubular shape Form and consists of a cylindrical body connect to the end parts, which are frustoconical trained collar to form the shield to give sufficient strength and dimensional stability.
- the wall is the Shield along its outer circumferential surface Blind holes provided to ensure an accurate location the shield inside the mold or die for to ensure the manufacture of the insulating body.
- edges and edges of the shield are more advantageous Rounded off to avoid undesirable turbulence and air pockets in the resin flow during to avoid the casting process of the insulating body.
- the insulating body can also have more than one shielding part take in.
- the wall of the shield advantageously faces uniform thickness.
- FIG. 1 and 4 is an isolation device shown, which is generally identified with 1.
- the insulating device 1 consists of an insulating body 2 and an electrically conductive shield 3, which in the Insulator is embedded and shown in dashed lines is.
- the shield 3 which is completely in the insulating body 2 is embedded, points in the example shown tubular shape and consists of a cylindrical part 4 and an end part 5, e.g. Has the shape of a truncated cone.
- the cylindrical component 4 of the shield 3 points in advantageously blind holes on the outer circumference of the Are arranged component; are in the example shown four holes offset by 90 °.
- Figures 2 and 3 show the body of the shield 3, which according to the invention consists of epoxy resin.
- the resin is been enriched with soot.
- the wall of the Shielding 3 advantageously constant thickness having.
- the edges 7 of the shield are in advantageously rounded.
- the shield 3 is produced using a material mixture with the following structure.
- Used material Company name Relative quantities epoxy resin SIR 7120/49 100 Soot CB L6 20 Harder Anidride 70/30 80 reaction accelerators Ammina DM-16D 0.8 Filler and adhesive Quartz M10 270
- the premix of the ingredients is at room temperature made and the mixing takes place in an advantageous manner at a vacuum ( ⁇ 3 mbar) over a period of 10 Minutes and at a temperature of around 70 ° C.
- the structure of the insulating body 2 made of epoxy resin advantageously has the same mixing ratio or a similar composition of the Mix of materials used for the production of the Shield 3 was used.
- the curing time of the material mixture is approximately 20 Minutes at the usual processing temperatures.
- the shield 3 is made separately in a mold which the material mixture with the addition of soot and other components (corresponding to the aforementioned Mixture example).
- the shield 3 which advantageously has a Casting process or a casting / pressing process after the shield has cured) in a known manner in a further known form Manufacture of the final insulating body 2 introduced.
- the finished insulating body 2 takes the shield 3 in its inside.
- the Shield 3 according to the invention which is made of epoxy resin exists, which was enriched with soot, a high Dimensional stability and enables precise location the attachment inside the mold, which then for the production of the actual insulating body 2 Is used.
- the special shape of the shield 3, the Final shape of the insulating body 2 is adapted, allows undesirable turbulence in the material flow of the synthetic resin to avoid during the casting process, whereby especially the formation of small cavities in the Resin mass, which is introduced into the mold, avoided become.
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Insulating Bodies (AREA)
- Insulators (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Liquid Crystal (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Description
Die vorstehende Erfindung betrifft eine Einrichtung zur elektrischen Isolierung bestehend aus einem Körper aus isolierendem Material, z.B. Epoxydharz und einer Abschirmung bestehend aus elektrisch leitendem Material und Epoxydharz. Es ist vorgesehen, dass die Abschirmung in den Körper der Isoliereinrichtung eingebettet wird.The above invention relates to a device for electrical insulation consisting of a body insulating material, e.g. Epoxy resin and one Shielding consisting of electrically conductive material and Epoxy resin. It is envisaged that the shielding in the Body of the isolation device is embedded.
Es sind bereits Einrichtungen für die elektrische Isolierung bekannt geworden, z.B. für Isolatoren, die auf dem Gebiet der Mittelspannung eingesetzt werden. Diese Isolatoren weisen eine oder mehrere Abschirmungen auf, die üblicherweise aus einem Maschennetz oder Gitter aus Metall bestehen.There are already facilities for electrical Insulation, e.g. for isolators on in the field of medium voltage. This Isolators have one or more shields that usually from a mesh or grid made of metal consist.
Die bekannten Isolatoren weisen den Nachteil auf, dass die Herstellung der aus einem Maschennetz oder Gitter bestehende Abschirmung in Handarbeit durchzufuehren ist und daher erhebliche Fertigungskosten entstehen.The known insulators have the disadvantage that the Manufacture from a mesh or grid existing shielding is to be carried out by hand and therefore considerable manufacturing costs arise.
Ferner können bei den bekannten Abschirmungen erhebliche Massabweichungen zwischen dem Körper des Isolators und der bekannten Abschirmung, bestehend aus einem Metallgewebe, festgestellt werden. Des weiteren bilden sich bei den bekannten Abschirmungen unerwünschte Ausfransungen des Metallnetzes, aus dem die bekannte Abschirmung besteht, was zu einem unerwünschten örtlichen Anstieg des elektrischen Feldes führt.Furthermore, the known shields can be considerable Dimensional deviations between the body of the insulator and the known shield, consisting of a metal mesh, be determined. Furthermore, the known shields unwanted fraying the Metal network from which the well-known shield consists, what to an undesirable local increase in electrical Field leads.
Aufgabe der vorstehenden Erfindung ist es, eine Einrichtung zum elektrischen Isolieren zu schaffen, welche die Nachteile des Standes der Technik nicht aufweist und auf rationelle Weise, in vorteilhafter Weise unter Einsatz automatischer Einrichtungn in Serie gefertigt werden kann, um die fertigungstechnischen Nachteile, sowie die bisher aufgetretenen Ausschusserzeugnisse zu vermeiden und ferner eine verbessserte Gleichmässigkeit aus elektrotechnischer Sicht für die Abschirmung und eine Isoliereinrichtung zu schaffen, die zusammen mit der Abschirmeinrichtung einen einheitlichen Körper bildet.The object of the above invention is a device to create electrical insulation which the Disadvantages of the prior art does not have and rational way, advantageously using automatic devices can be mass-produced, to the manufacturing disadvantages, as well as the previously to avoid rejects that have occurred and further improved uniformity from electrical engineering View for the shielding and an insulation device too create one together with the shielding device forms a unified body.
Diese Aufgabe wird durch eine elektrische Isoliereinrichtung geschaffen, die aus einem Körper aus isolierendem Material wie Kunstharz besteht, und der Körper eine Abschirmung aus leitendem Material aufnimmt und sich dadurch kennzeichnet, dass die Abschirmung aus Epoxydharz besteht, das mit Russteilchen angereichert ist und die Abschirmung elektrisch leitend macht.This task is done by an electrical Isolation device created from a body insulating material such as synthetic resin, and the body receives a shield made of conductive material and characterized in that the shield made of epoxy resin exists, which is enriched with soot particles and the Shielding makes it electrically conductive.
Durch die Beimengung von mehr oder weniger grossen Russanteilen wird die Abschirmung in einer gewünschten Weise elektrisch leitend gemacht.By adding more or less large ones The shielding in a desired proportion Made way electrically conductive.
Dadurch, dass sowohl der Isolator als auch die Abschirmung unter Verwendung des gleichen Harzes hergestellt werden, wird es ermöglicht, einen einheitlich ausgebildeten Isolierkörper zu schaffen.Because both the insulator and the shield be made using the same resin it is possible to have a uniformly trained To create insulating bodies.
Der erfindungsgemäss ausgebildete Isolierkörper weist ferner den Vorteil auf, dass das Bauteil der Abschirmung automatisch und in Serien hergestellt werden kann, in vorteilhafter Weise durch einen Giess/Pressvorgang.The insulating body designed according to the invention has furthermore the advantage that the component of the shield can be produced automatically and in series advantageously by a casting / pressing process.
Dadurch kann die Abschirmung und somit der gesamte Isolator mit grosser Genauigkeit hergestellt und mit höchsten, konstanten Qualitätsmerkmalen gefertigt werden besonders, was die räumliche Ausbildung der Bauteile anbetrifft. Die Form der Abschirmung kann in einfacher Weise an die vorgegebene Form des Isolierkörpers oder umgekehrt angepasst werden. Ferner kann eine unerwünschte, örtliche Zunahme des elektrischen Feldes, wie dies bisher entlang der unvermeidlichen Ausfransungen der aus einen Metallnetz bestehenden Abschirmung auftrat, vermieden werden.This allows the shield and thus the entire insulator manufactured with great accuracy and with the highest constant quality features are especially manufactured, as far as the spatial training of the components is concerned. The The shape of the shielding can easily be attached to the predetermined shape of the insulating body or vice versa be adjusted. Furthermore, an undesirable, local Increase in the electric field as so far along the inevitable fraying of a metal mesh existing shielding occurred.
Bei einem bevorzugten Ausführungsbeispiel weist das verwendete Kunstharz zur Schaffung des Isolierkörpers Merkmale auf, die ähnlich der Kunstharzzusammensetzung sind, die für die elektrisch leitende Abschirmung verwendet wird, und aus diesem Grund wird ein unerwünschtes Trennen zwischen der Abschirmung und dem Isolierkörper vermieden.In a preferred embodiment, this used synthetic resin to create the insulating body Features similar to the resin composition are used for the electrically conductive shielding will, and because of this, undesirable disconnection avoided between the shield and the insulating body.
In vorteilhafter Weise weist die Abschirmung rohrförmige Gestalt auf und besteht aus einem zylindrischen Grundkörper an den Endteile anschliessen, die einen kegelstumpfartig ausgebildeten Kragen bilden, um somit der Abschirmung ausreichende Festigkeit und Formstabilität zu verleihen.The shield advantageously has a tubular shape Form and consists of a cylindrical body connect to the end parts, which are frustoconical trained collar to form the shield to give sufficient strength and dimensional stability.
Auch andere geometrische Formgestalten sind möglich.Other geometric shapes are also possible.
In einem bevorzugten Ausführungsbeispiel ist die Wand der Abschirmung entlang ihrer äusseren Umfangsfläche mit Sacklöchern versehen, um somit eine genaue Lageanordnung der Abschirmung im Inneren der Giess- oder Pressform für die Herstellung des Isolierkörpers zu gewährleisten.In a preferred embodiment, the wall is the Shield along its outer circumferential surface Blind holes provided to ensure an accurate location the shield inside the mold or die for to ensure the manufacture of the insulating body.
Die Kanten und Ränder der Abschirmung sind in vorteilhafter Weise abgerundet, um somit unverwünschte Turbulenzerscheinungen und Lufteinschlüsse im Kunstharzfluss während des Giessvorganges des Isolierkörpers zu vermeiden.The edges and edges of the shield are more advantageous Rounded off to avoid undesirable turbulence and air pockets in the resin flow during to avoid the casting process of the insulating body.
Der Isolierkörper kann auch mehr als eine Abschirmungsteil in sich aufnehmen.The insulating body can also have more than one shielding part take in.
Die Wand der Abschirmung weist in vorteilhafter Weise gleichmässige Dicke auf.The wall of the shield advantageously faces uniform thickness.
Der Erfindungsgegenstand wird nun genauer beschrieben und anhand eines Ausführungsbeispieles in den beigefügten Zeichnungen dargestellt.The subject of the invention will now be described in more detail and using an exemplary embodiment in the accompanying Drawings shown.
Es zeigen:
In den Figuren 1 und 4 ist eine Isoliereinrichtung dargestellt, die gesamthaft mit 1 gekennzeichnet ist.In Figures 1 and 4 is an isolation device shown, which is generally identified with 1.
Die Isoliereinrichtung 1 besteht aus einem Isolierkörper 2
und einer elektrisch leitenden Abschirmung 3, die in den
Isolierkörper eingebettet ist und gestrichelt dargestellt
ist.The
Die Abschirmung 3, die vollständig in den Isolierkörper 2
eingebettet ist, weist bei dem dargestellten Beispiel
rohrförmige Gestalt auf und besteht aus einem
zylinderförmigen Teil 4 und einem Endteil 5, das z.B.
Kegelstumpfform aufweist.The
Auch andere Formgebungen sind möglich.Other shapes are also possible.
Das zylinderförmige Bauteil 4 der Abschirmung 3 weist in
vorteilhafter Weise Sacklöcher auf, die am Aussenumfang des
Bauteiles angeordnet sind; im dargestellten Beispiel sind
vier Bohrungen um 90° versetzt angeordnet.The
Die Figuren 2 und 3 zeigen den Körper der Abschirmung 3,
der erfindungsgemäss aus Epoxydharz besteht. Das Harz ist
mit Russ angereichert worden.Figures 2 and 3 show the body of the
Diese Massnahme wurde getroffen, um die Abschirmung 3 in der gewünschten Weise elektrisch leitend auszubilden.This measure was taken to shield 3 in the desired way to form electrically conductive.
Den Zeichnungen kann entnommmen werden, dass die Wand der
Abschirmung 3 in vorteilhafter Weise konstante Dicke
aufweist. Die Kanten 7 der Abschirmung sind in
vorteilhafter Weise abgerundet ausgebildet.It can be seen from the drawings that the wall of the
Gemäss der Erfindung wird die Abschirmung 3 unter
Verwendung einer Materialmischung mit folgenden Aufbau
hergestellt.
Die Vormischung der Bestandteile wird bei Raumtemperatur vorgenommen und die Mischung erfolgt in vorteilhafter Weise bei einem Unterdruck (< 3 mbar) über einen Zeitraum von 10 Minuten und bei einer Temperatur von ungefähr 70° C. The premix of the ingredients is at room temperature made and the mixing takes place in an advantageous manner at a vacuum (<3 mbar) over a period of 10 Minutes and at a temperature of around 70 ° C.
Der aus Epoxydharz bestehende Aufbau des Isolierkörpers 2
weist in vorteilhafter Weise das gleiche Mischungsverhältnis
oder eine ähnliche Zusammensetzung der
Materialmischung auf, die für die Herstellung der
Abschirmung 3 verwendet wurde.The structure of the
Die Aushärtezeit der Materialmischung beträgt ungefähr 20 Minuten bei den üblichen Verarbeitungstemperaturen.The curing time of the material mixture is approximately 20 Minutes at the usual processing temperatures.
Die Abschirmung 3 wird getrennt in einer Form hergestellt,
welche die Materialmischung unter Beimischung von Russ und
anderen Bestandteilen (entsprechend dem vorgenannten
Mischungsbeispiel) aufnimmt.The
Die Abschirmung 3, die in vorteilhafter Weise über ein
Giessverfahren oder ein Giess/Pressverfahren hergestellt
wurde, wird (nach dem Aushärten der Abschirmung) in
bekannter Weise in eine weitere an sich bekannte Form zur
Herstellung des entgültigen Isolierkörpers 2 eingebracht.
Der fertige Isolierkörper 2 nimmt die Abschirmung 3 in
seinem Inneren auf.The
Gegenüber einer bekannten Abschirmung weist die
erfindungsgemässe Abschirmung 3, die aus Epoxydharz
besteht, das mit Russ angereichert wurde, eine hohe
Formstabilität auf und ermöglicht ein ortgenaues Anbringen
der Anbringung im Inneren der Giessform, die anschliesend
zur Herstellung des eigentlichen Isolierkörpers 2
Verwendung findet. Compared to a known shield, the
Die besondere Formgestaltung der Abschirmung 3, die der
Endform des Isolierkörpers 2 angepasst ist, erlaubt es,
unerwünschte Turbulenzen im Materialfluss des Kunstharzes
während des Giessvorganges zu vermeiden, wodurch
insbesondere die Bildung von Kleinsthohlräumen in der
Harzmasse, die in die Giessform eingebracht wird, vermieden
werden.The special shape of the
Die Steifigkeit der Abschirmung 3 und das Fehlen von
Ausfransungen an den Rändern eines Metallgewebes vermeiden
die Bildung von Teilentladungen, die in kürzester Zeit zu
einer Materialveränderung und zu einem Verschleiss des
Isolators führen würden.The rigidity of the
Die Verwendung von Epoxydharz zusammen mit den
verschiedenen aufgeführten Zusatzstoffen soll für die
Abschirmung 3 als auch für den Isoierkörprer 2
gewährleisten, dass eine einwandfreie innige Verbindung
zwischen der Abschirmung 3 und dem Isolierkörper 2 erzielt
wird. Somit wird ein unerwünschtes Ablösung der Abschirmung
3 vom Isolierkörper 2 aufgrund thermischer Veränderungen,
die sich während des Einsatzes der gesamten
Isoliereinrichtung 1 ergeben, vermieden.The use of epoxy resin together with the
The various additives listed are intended for
Claims (8)
- Electrically insulating device (1) comprising a body (2) of insulating material, such as synthetic resin, the body (2) accommodating a shielding (3) of electrically conductive material, characterized in that the shielding (3) consists of epoxy resin which is enriched with carbon black particles and makes the shielding (3) electrically conductive.
- Insulating device according to Patent Claim 1, characterized in that the material for creating the insulating body (2) and the electrically conductive shielding (3) consist of epoxy resin.
- Insulating device according to Patent Claim 1, characterized in that the shielding (3) comprises a cylindrical tube body (4), which has end parts (5) which are frustoconically formed.
- Insulating device according to Patent Claims 1 and 2, characterized in that the shielding (3) is produced by means of a casting/pressing process.
- Insulating device according to Patent Claim 1, characterized in that the body of the shielding (3) has on its outer circumference blind holes (6) for the insertion of positioning means.
- Insulating device according to Patent Claim 1, characterized in that the edges or rims (7) of the shielding (3) are formed such that they are rounded off.
- Insulating device according to Patent Claim 1, characterized in that a number of shieldings (3) are arranged in the body (2).
- Insulating device according to Patent Claim 1, characterized in that the wall of the shielding (3) has a constant thickness.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI951797 | 1995-08-24 | ||
| IT95MI001797A IT1277490B1 (en) | 1995-08-24 | 1995-08-24 | ELECTRIC INSULATION VEHICLE |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0762434A2 EP0762434A2 (en) | 1997-03-12 |
| EP0762434A3 EP0762434A3 (en) | 1998-04-01 |
| EP0762434B1 true EP0762434B1 (en) | 2003-06-04 |
Family
ID=11372188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96113144A Expired - Lifetime EP0762434B1 (en) | 1995-08-24 | 1996-08-16 | Apparatus useful as an electrical insulation |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0762434B1 (en) |
| DE (1) | DE59610492D1 (en) |
| ES (1) | ES2200024T3 (en) |
| IT (1) | IT1277490B1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3394455A (en) * | 1967-03-17 | 1968-07-30 | Westinghouse Electric Corp | Method of constructing cast electrical bushings |
| US3600502A (en) * | 1969-11-26 | 1971-08-17 | Westinghouse Electric Corp | Electrical condenser bushing having a plurality of cylindrical, interleaved, ground and tap layers |
| DE3843943A1 (en) * | 1988-12-24 | 1990-06-28 | Asea Brown Boveri | Converter housing and a method for producing bushing arrangements on this housing |
-
1995
- 1995-08-24 IT IT95MI001797A patent/IT1277490B1/en active IP Right Grant
-
1996
- 1996-08-16 EP EP96113144A patent/EP0762434B1/en not_active Expired - Lifetime
- 1996-08-16 DE DE59610492T patent/DE59610492D1/en not_active Expired - Lifetime
- 1996-08-16 ES ES96113144T patent/ES2200024T3/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ES2200024T3 (en) | 2004-03-01 |
| EP0762434A2 (en) | 1997-03-12 |
| ITMI951797A1 (en) | 1997-02-24 |
| EP0762434A3 (en) | 1998-04-01 |
| IT1277490B1 (en) | 1997-11-10 |
| ITMI951797A0 (en) | 1995-08-24 |
| DE59610492D1 (en) | 2003-07-10 |
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