EP0700057A2 - Longitudinally and transversely watertight power cable - Google Patents

Longitudinally and transversely watertight power cable Download PDF

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Publication number
EP0700057A2
EP0700057A2 EP95109668A EP95109668A EP0700057A2 EP 0700057 A2 EP0700057 A2 EP 0700057A2 EP 95109668 A EP95109668 A EP 95109668A EP 95109668 A EP95109668 A EP 95109668A EP 0700057 A2 EP0700057 A2 EP 0700057A2
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EP
European Patent Office
Prior art keywords
power cable
cable according
tape
screen
cable
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.)
Granted
Application number
EP95109668A
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German (de)
French (fr)
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EP0700057A3 (en
EP0700057B1 (en
Inventor
Dietmar Dipl.-Ing. Banowski
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.)
Nexans SA
Alcatel Lucent SAS
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Alcatel Kabel AG and Co
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Publication of EP0700057A2 publication Critical patent/EP0700057A2/en
Publication of EP0700057A3 publication Critical patent/EP0700057A3/en
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Publication of EP0700057B1 publication Critical patent/EP0700057B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
    • H01B7/288—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using hygroscopic material or material swelling in the presence of liquid

Definitions

  • the present invention relates to a longitudinally and transversely watertight electrical energy cable with a screen made of metallic wires or strips arranged above the conductor insulation or a conductive layer above it, and a closed metallic sheath as a cross-water barrier in the further layer structure, the screen area containing swelling materials when exposed to moisture.
  • the so-called layered sheath which has long been used in the production of communication cables, in the form of a metal foil which surrounds the cable core and is sealed at the edges, has now become established that is glued to the outer jacket.
  • this measure protects the undamaged cable in normal, undisturbed operation, the layered jacket construction does not prevent water ingress and moisture conduction along the cable axis in the event of a fault if this moisture protection is destroyed at one point by the action of external forces.
  • the invention is therefore based on the object to find a way that allows the screen area of an electrical power cable to seal against moisture transmission, but at the same time to ensure that potential differences between the electrical screen of the power cable and the metallic sheath to ensure cross-water resistance in the Avoid cables from the outset.
  • This object is achieved according to the invention in that at least one swellable material and at the same time a strip containing conductive inserts is provided above the screen.
  • the swellable material ensures local limitation, e.g. B. after mechanical damage to the outer shell and the metallic shell, moisture penetration. At the same time, however, it also guarantees that the swelling material closes cavities at the point of damage and thus prevents further penetration of moisture into the interior of the cable.
  • the Conductive inserts also ensure a permanent electrically conductive contact between the cable shield and the metallic sheath if the tape according to the invention directly surrounds the shield wires or tapes or a transverse helix applied thereon and the metallic sheath, for. B. in the form of an aluminum tape applied with overlapping tape edges.
  • the tape used is a nonwoven tape containing swellable material and doped with metal particles.
  • the basis of such so-called swellable nonwovens is formed by plastic layer nonwovens, the layers of which are built up from or contain swellable material.
  • Swellable masses for example in powder form, can be those based on cellulose but also those based on synthetic materials.
  • Such tapes allow a short-term access to moisture to the swellable material, moreover, by installing the swellable material in such tape material, a simple manufacturing process is guaranteed and ensured that the materials to be sealed off the cable core even after the manufacture of the cable, the transport or its installation to the Places are available where they effectively block the damaged area when moisture breaks in.
  • the conductive material also embedded in such a swellable nonwoven in addition to the swellable material can consist, for example, of metal tinsel or short threads, for example of copper or aluminum, the usual wall thickness of such swellable nonwovens ensures that a constant metallic conductive contact between the metallic shield of the metal over the cable length Cable and the metallic sheath used for water resistance is ensured.
  • the tape is a non-woven tape containing swellable material and interwoven with metallic threads or strips.
  • the metallic thread or strip e.g. B. made of aluminum or copper, runs alternately from one surface of the tape to the other, in addition to the simultaneous, problem-free contacting of the metallic shield and the metallic sheath ensures this embodiment regular cross-connections along the entire cable route.
  • possible potential differences along the cable are compensated, special measures to compensate for potential differences, for example in the socket area, are no longer necessary.
  • the arrangement of the tape according to the invention in the layer structure of the cable can be such that the swellable material and tape containing conductive inserts run in the longitudinal direction of the cable.
  • it can often be expedient to let two or more bands run in the longitudinal direction on opposite sides in the cable. This is particularly the case if additional winding devices are to be dispensed with in the production process.
  • the band containing swellable materials and conductive inserts helically surrounds the screen.
  • Such a winding can be applied in the form of a closed layer, but one can also apply two tapes in opposite directions and at a distance to the shielding of the electrical cable, so that a so-called cross helix results as the image.
  • the decisive factor is that in addition to the plugging by embedded swellable material, a permanent electrical connection between the screen and the Cross-watertight metallic sheath along the cable is ensured.
  • the so-called inner conductive layer 2 for example made of a soot-filled polymer material, extruded.
  • This inner conductive layer 2 is followed by the electrical insulation 3, for example made of a cross-linked polyethylene, it is covered by the so-called outer conductive layer 4, in the illustrated embodiment also made of a carbon-black conductive polymer material, such as polyethylene or one of its copolymers.
  • a conductive tape 5 is arranged above the outer conductive layer 4, for example a crepe paper tape made conductive by graphite or carbon black, optionally in combination with a swellable nonwoven tape.
  • This conductive tape 5 serves practically as a cushion layer for the screen 6 located above it from z.
  • the tape 7 designed according to the invention, also swellable nonwoven, is used to block the shield area and to prevent it from being passed on to the cable at one point. ensures constant contact between the screen 6 and the metallic sheath 8 arranged above the band 7.
  • This metallic shell 8 is, for example, one on the polyethylene outer jacket 9 facing surface with a copolymer of ethylene or a hot melt adhesive coated aluminum tape, the tape edges overlap each other and which are glued together in the overlap area.
  • a permanent connection to the outer jacket takes place after the coating of the aluminum strip has melted and has hardened again after cooling.

Landscapes

  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Bridges Or Land Bridges (AREA)
  • Building Environments (AREA)

Abstract

On the multi-wire core (1) and inner conductive layer (2) of e.g. soot-filled polymer is extruded and covered with e.g. crosslinked polyethylene insulation (3). Over this an outer conductive layer (4) of filled polyethylene or one of its copolymers underlies a layer of crepe paper tape (5) rendered conductive by graphite or soot and forming a cushion for the screen (6) of e.g. CU wires. An absorbent textile strip (7) loaded with e.g. Cu or Al tinsel or threads of limited length guarantees continuous contact between this screen and an outer metallic sleeve (8) under polyethylene jacket (9).

Description

Die vorliegende Erfindung betrifft ein längs- und querwasserdichtes elektrisches Energiekabel mit über der Leiterisolierung bzw. einer darüber befindlichen Leitschicht angeordnetem Schirm aus metallischen Drähten oder Bändern sowie einer geschlossenen metallischen Hülle als Querwassersperre im weiteren Schichtenaufbau, wobei der Schirmbereich bei Feuchtigkeitseinwirkung quellende Materialien enthält.The present invention relates to a longitudinally and transversely watertight electrical energy cable with a screen made of metallic wires or strips arranged above the conductor insulation or a conductive layer above it, and a closed metallic sheath as a cross-water barrier in the further layer structure, the screen area containing swelling materials when exposed to moisture.

Elektrische Kabel für Mittel- oder Hochspannung, bei denen über der Isolierung bzw. einer darauf befindlichen äußeren Leitschicht der Metallschirm in Form von die Kabelseele umfassenden Drähten oder Bändern aufgebracht ist, sind seit langem üblich. Die Drähte oder Bänder werden in der Regel durch eine Bandbewicklung in ihrer Lage fixiert bevor der Außenmantel durch Extrusion aufgebracht wird. Bei Beschädigung dieser äußeren Schutzhülle, beispielsweise bei der Verlegung oder im Betrieb durch äußere mechanische Einwirkung, besteht Gefahr, daß von außen Feuchtigkeit in das Kabel eindringt und entlang der Zwischenräume zwischen den einzelnen Bändern oder Drähten wandert und damit zu Korrosionserscheinungen führen kann. Eingedrungene Feuchtigkeit kann aber auch Anlaß zu Schäden in der Isolierung sein, so daß etwa durch das sogenannte "watertreeing" verursachte Durchschläge im Laufe der Zeit erwartet werden können.Electrical cables for medium or high voltage, in which the metal shield in the form of wires or strips comprising the cable core is applied over the insulation or an outer conductive layer thereon, have long been common. The wires or tapes are usually fixed in their position by tape winding before the outer sheath is applied by extrusion. If this outer protective cover is damaged, for example during installation or in operation by external mechanical influences, there is a risk that moisture will penetrate into the cable from the outside and migrate along the spaces between the individual strips or wires and thus lead to signs of corrosion. Moisture penetration can also cause damage to the insulation, so that breakdowns caused by the so-called "watertreeing" occur over time can be expected.

Da es weiterhin bekannt ist, daß die normalerweise zur Herstellung von Kabelmänteln verwendeten Kunststoffe keine vollständige Diffusionssperre gegen Feuchtigkeit darstellen, hat sich zwischenzeitlich der seit langem bei der Herstellung von Nachrichtenkabeln verwendete sogenannte Schichtenmantel in Form einer die Kabelseele rohrförmig umschließenden und an den Kanten verschlossenen Metallfolie durchgesetzt, die mit dem Außenmantel verklebt ist. Diese Maßnahme schützt zwar das unbeschädigte Kabel im ungestörten Normalbetrieb, die Schichtenmantelkonstruktion verhindert aber nicht einen Wassereintritt und Fortleitung der Feuchtigkeit längs der Kabelachse im Störungsfall, wenn dieser Feuchtigkeitsschutz durch Einwirkung äußerer Kräfte an einer Stelle zerstört wird.Since it is also known that the plastics normally used for the production of cable sheaths do not represent a complete diffusion barrier against moisture, the so-called layered sheath, which has long been used in the production of communication cables, in the form of a metal foil which surrounds the cable core and is sealed at the edges, has now become established that is glued to the outer jacket. Although this measure protects the undamaged cable in normal, undisturbed operation, the layered jacket construction does not prevent water ingress and moisture conduction along the cable axis in the event of a fault if this moisture protection is destroyed at one point by the action of external forces.

In die von den Schirmdrähten oder Bändern gebildeten Zwischenräume der Abschirmung Quellpulver einzubringen, hat zwar zur Folge, daß durch Aufnahme der Feuchtigkeit im Schadensfall dieses Quellpulver den Bereich eingedrungener Feuchtigkeit abstopft, die Füllung des Schirmbereiches mit Quellpulver bringt jedoch einen erheblichen Montageaufwand mit sich, wenn Muffen am Kabel gesetzt oder Verbindungsstellen hergestellt werden müssen. Bei der Herstellung des Kabels sind darüberhinaus besondere Vorrichtungen zur Quellpulveraufbringung erforderlich, aus Gründen der Arbeitssicherheit bedarf es zusätzlicher Absaugvorrichtungen für überschüssiges Quellpulvermaterial. Bei der bereits angesprochenen Kabelmontage führt das freigelegte Quellpulver beim Absetzen des Kabels unter Einwirkung von Feuchtigkeit, insbesondere der Luftfeuchtigkeit wenn die Montage im Freien erfolgt, durch das gelartige Aufquellen des Pulvers zu erschwerten Montagebedingungen.Introducing swelling powder into the interstices of the shield formed by the shielding wires or bands has the consequence that this swelling powder absorbs moisture in the event of damage in the event of damage, but filling the shielding area with swelling powder entails a considerable amount of assembly work if sleeves on the cable or connection points must be made. In addition, special devices for applying source powder are required in the manufacture of the cable. For reasons of occupational safety, additional suction devices for excess source powder material are required. In the case of the cable assembly mentioned above, the exposed swelling powder when the cable is removed under the influence of moisture, in particular the atmospheric humidity when the assembly is carried out outdoors, leads to more difficult installation conditions due to the gel-like swelling of the powder.

Zwar ist es auch bekannt (DE-OS 30 05 875), anstelle des Quellpulvers im Schirmbereich über dem Schirm eine geschlossene Lage aus quellfähigen Bändern vorzusehen, im Zusammenhang mit der für die Querwasserdichtigkeit erforderlichen metallischen Hülle im Schichtenaufbau ist diese bekannte Maßnahme jedoch insofern weniger geeignet, als zusätzliche Maßnahmen getroffen werden müssen, um beim Betrieb des Kabels erzeugte elektrische Potentialdifferenzen zwischen der Abschirmung des Kabels und der im Schichtenaufbau in der Regel unmittelbar unter dem Außenmantel befindlichen metallischen Hülle zu vermeiden bzw. auszugleichen. Ein solcher Ausgleich muß dann in der nächstliegenden Muffe oder Verbindungsstelle erfolgen, was dort einen zusätzlichen Montageaufwand erfordert.Although it is also known (DE-OS 30 05 875) to provide a closed layer of swellable tapes instead of the swelling powder in the area of the screen above the screen, this known measure is less suitable in connection with the metallic sheath required for cross-water resistance in the layer structure , as additional measures must be taken in order to avoid or compensate for electrical potential differences generated during operation of the cable between the shielding of the cable and the metallic sheath which is generally located directly under the outer sheath in the layer structure. Such compensation must then take place in the nearest sleeve or connection point, which requires additional assembly work there.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Möglichkeit zu finden, die es erlaubt, den Schirmbereich eines elektrischen Energiekabels gegen Feuchtigkeitsweiterleitung abzudichten, gleichzeitig aber dafür zu sorgen, daß mögliche Potentialdifferenzen zwischen dem elektrischen Schirm des Energiekabels und der metallischen Hülle zur Sicherung einer Querwasserdichtigkeit im Kabel von vornherein unterbleiben.The invention is therefore based on the object to find a way that allows the screen area of an electrical power cable to seal against moisture transmission, but at the same time to ensure that potential differences between the electrical screen of the power cable and the metallic sheath to ensure cross-water resistance in the Avoid cables from the outset.

Gelöst wird diese Aufgabe gemäß der Erfindung dadurch, daß oberhalb des Schirmes mindestens ein quellfähiges Material und gleichzeitig leitfähige Einlagen enthaltendes Band vorgesehen ist. Das quellfähige Material sichert eine örtliche Begrenzung, z. B. nach mechanischer Beschädigung des Außenmantels sowie der metallischen Hülle, eingedrungener Feuchtigkeit. Es bietet gleichzeitig aber auch Gewähr dafür, daß das bei Wasserzutritt quellende Material Hohlräume an der Schadensstelle verschließt und damit weiteres Eindringen von Feuchtigkeit in das Kabelinnere verhindert. Die leitfähigen Einlagen sichern darüberhinaus einen ständigen elektrisch leitenden Kontakt zwischen dem Kabelschirm und der metallischen Hülle, wenn das erfindungsgemäße Band die Schirmdrähte bzw. -bänder oder eine darauf aufgebrachte Querwendel unmittelbar umschließt und über diesem Band die metallische Hülle, z. B. in Form eines mit überlappenden Bandkanten aufgebrachten Aluminiumbandes, angeordnet ist.This object is achieved according to the invention in that at least one swellable material and at the same time a strip containing conductive inserts is provided above the screen. The swellable material ensures local limitation, e.g. B. after mechanical damage to the outer shell and the metallic shell, moisture penetration. At the same time, however, it also guarantees that the swelling material closes cavities at the point of damage and thus prevents further penetration of moisture into the interior of the cable. The Conductive inserts also ensure a permanent electrically conductive contact between the cable shield and the metallic sheath if the tape according to the invention directly surrounds the shield wires or tapes or a transverse helix applied thereon and the metallic sheath, for. B. in the form of an aluminum tape applied with overlapping tape edges.

Besonders vorteilhaft ist es, wenn in Durchführung der Erfindung das verwendete Band ein quellfähiges Material enthaltendes und mit Metallpartikeln dotiertes Vliesband ist. Die Basis solcher sogenannter Quellvliese bilden Kunststoff-Schichtvliesstoffe, deren Lagen aus quellfähigem Material aufgebaut sind oder solches enthalten. Quellfähige Massen, etwa in Pulverform, können solche auf Cellulosebasis sein aber auch solche auf Basis synthetischer Werkstoffe. Solche Bänder ermöglichen einen kurzfristigen Feuchtigkeitszutritt zu dem quellfähigen Material, darüberhinaus ist durch den Einbau des quellfähigen Materials in solchem Bandmaterial ein einfacher Fertigungsablauf gewährleistet und sichergestellt, daß die die Kabelseele abzudichtenden Materialien auch nach der Herstellung des Kabels, dem Transport oder seiner Verlegung noch an den Stellen vorhanden sind, wo sie bei Feuchtigkeitseinbruch wirksam die Abstopfung der Schadensstelle bewirken.It is particularly advantageous if, in carrying out the invention, the tape used is a nonwoven tape containing swellable material and doped with metal particles. The basis of such so-called swellable nonwovens is formed by plastic layer nonwovens, the layers of which are built up from or contain swellable material. Swellable masses, for example in powder form, can be those based on cellulose but also those based on synthetic materials. Such tapes allow a short-term access to moisture to the swellable material, moreover, by installing the swellable material in such tape material, a simple manufacturing process is guaranteed and ensured that the materials to be sealed off the cable core even after the manufacture of the cable, the transport or its installation to the Places are available where they effectively block the damaged area when moisture breaks in.

Das neben dem quellfähigen Material ebenfalls in einem solchen Quellvlies eingelagerte leitfähige Material kann beispielsweise aus Metallflittern oder kurzen Fäden bestehen, beispielsweise aus Kupfer oder Aluminium, die übliche Wandstärke solcher Quellvliese stellt sicher, daß über die Kabellänge ein ständiger metallisch leitfähiger Kontakt zwischen dem metallischen Schirm des Kabels und der zur Querwasserdichtigkeit herangezogenen metallischen Hülle sichergestellt ist.The conductive material also embedded in such a swellable nonwoven in addition to the swellable material can consist, for example, of metal tinsel or short threads, for example of copper or aluminum, the usual wall thickness of such swellable nonwovens ensures that a constant metallic conductive contact between the metallic shield of the metal over the cable length Cable and the metallic sheath used for water resistance is ensured.

Eine andere vorteilhafte Variante erfindungsgemäßer Ausführungsformen ist die, daß das Band ein quellfähiges Material enthaltendes und mit metallischen Fäden oder Streifen durchwirktes Vliesband ist. Der metallische Faden oder der Streifen, z. B. aus Aluminium oder Kupfer hergestellt, verläuft abwechselnd von einer Oberfläche des Bandes zur anderen, neben der gleichzeitigen, problemlosen Kontaktierung des metallischen Schirmes sowie der metallischen Hülle sichert diese Ausführungsform regelmäßige Querverbindungen längs der gesamten Kabelstrecke. Wie auch bei der ersten Ausführungsform werden mögliche Potentialdifferenzen noch längs des Kabels ausgeglichen, besondere Maßnahmen zum Ausgleich von Potentialdifferenzen etwa im Muffenbereich, sind nicht mehr erforderlich.Another advantageous variant of embodiments according to the invention is that the tape is a non-woven tape containing swellable material and interwoven with metallic threads or strips. The metallic thread or strip, e.g. B. made of aluminum or copper, runs alternately from one surface of the tape to the other, in addition to the simultaneous, problem-free contacting of the metallic shield and the metallic sheath ensures this embodiment regular cross-connections along the entire cable route. As in the first embodiment, possible potential differences along the cable are compensated, special measures to compensate for potential differences, for example in the socket area, are no longer necessary.

Die Anordnung des erfindungsgemäßen Bandes im Schichtenaufbau des Kabels kann so getroffen sein, daß das quellfähiges Material und leitfähige Einlagen enthaltende Band in Kabellängsrichtung verläuft. Anstelle eines einzigen Bandes kann es oft zweckmäßig sein, an im Kabel gegenüberliegenden Seiten zwei oder mehr Bänder in Längsrichtung verlaufen zu lassen. Dies ist insbesondere dann der Fall, wenn im Fertigungsprozeß auf zusätzliche Wickeleinrichtungen verzichtet werden soll.The arrangement of the tape according to the invention in the layer structure of the cable can be such that the swellable material and tape containing conductive inserts run in the longitudinal direction of the cable. Instead of a single band, it can often be expedient to let two or more bands run in the longitudinal direction on opposite sides in the cable. This is particularly the case if additional winding devices are to be dispensed with in the production process.

Man kann aber auch so vorgehen, daß das quellfähige Materialien und leitfähige Einlagen enthaltende Band wendelförmig den Schirm umgibt. Eine solche Bewicklung kann in Form einer geschlossenen Lage aufgebracht werden, man kann aber auch zwei Bänder jeweils gegenläufig und mit Abstand auf die Schirmung des elektrischen Kabels aufbringen, so daß sich als Bild eine sogenannte Kreuzwendel ergibt. Welche Form des Aufbringens auch gewählt wird, entscheidend ist, daß neben der Abstopfung durch eingelagertes quellfähiges Material eine ständige elektrische Verbindung zwischen dem Schirm und der die Querwasserdichtigkeit bewirkenden metallischen Hülle längs des Kabels sichergestellt ist.However, one can also proceed in such a way that the band containing swellable materials and conductive inserts helically surrounds the screen. Such a winding can be applied in the form of a closed layer, but one can also apply two tapes in opposite directions and at a distance to the shielding of the electrical cable, so that a so-called cross helix results as the image. Whichever form of application is chosen, the decisive factor is that in addition to the plugging by embedded swellable material, a permanent electrical connection between the screen and the Cross-watertight metallic sheath along the cable is ensured.

Die Erfindung sei anhand des in der Figur als Ausführungsbeispiel dargestellten elektrischen Mittel- oder Hochspannungskabels näher erläutert.The invention will be explained in more detail with reference to the medium or high-voltage electrical cable shown as an exemplary embodiment in the figure.

Auf den z. B. aus miteinander verseilten oder verwirkten Einzeldrähten bestehenden Leiter 1 dieses Kabels ist die sogenannte innere Leitschicht 2, beispielsweise aus einem rußgefüllten Polymermaterial, aufextrudiert. An diese innere Leitschicht 2 schließt sich die elektrische Isolierung 3 an, beispielsweise aus einem vernetzten Polyethylen, sie wird abgedeckt von der sogenannten äußeren Leitschicht 4, im dargestellten Ausführungsbeispiel ebenfalls aus einem rußgefüllten leitfähigen polymeren Material, wie Polyethylen oder eines seiner Copolymere.On the z. B. from stranded or forged individual wires existing conductor 1 of this cable, the so-called inner conductive layer 2, for example made of a soot-filled polymer material, extruded. This inner conductive layer 2 is followed by the electrical insulation 3, for example made of a cross-linked polyethylene, it is covered by the so-called outer conductive layer 4, in the illustrated embodiment also made of a carbon-black conductive polymer material, such as polyethylene or one of its copolymers.

Über der äußeren Leitschicht 4 ist ein leitfähiges Band 5 angeordnet, beispielsweise ein durch Graphit oder Ruß leitfähig gemachtes Kreppapierband, gegebenenfalls in Kombination mit einem Quellvliesband. Dieses leitfähige Band 5 dient praktisch als Polsterschicht für den darüber befindlichen Schirm 6 aus z. B. Kupferdrähten, die von einer sogenannten Querleitwendel ebenfalls aus Kupfer umwickelt sind. Zur Abstopfung des Schirmbereiches und zur Verhinderung einer Fortleitung an einer Stelle in das Kabel eingedrungener Feuchtigkeit dient das erfindungsgemäß ausgebildete Band 7, auch Quellvlies, das mittels seiner beispielsweise aus Kupfer oder Aluminium bestehenden Einlagen, wie Flitter oder Fäden begrenzter Länge oder eingewirkter Fäden oder Streifen, eine ständige Kontaktierung zwischen dem Schirm 6 und der über dem Band 7 angeordneten metallischen Hülle 8 gewährleistet. Diese metallische Hülle 8 ist beispielsweise ein an der dem Polyethylen- Außenmantel 9 zugekehrten Oberfläche mit einem Copolymer des Ethylens oder einem Schmelzkleber beschichtetes Aluminiumband, dessen Bandkanten einander überlappen und die im Überlappungsbereich miteinander verklebt sind. Bei der Extrusion des Polyethylens des Außenmantels erfolgt nach Aufschmelzen der Beschichtung des Aluminiumbandes und Wiedererhärten nach dem Erkalten eine dauerhafte Verbindung mit dem Außenmantel.A conductive tape 5 is arranged above the outer conductive layer 4, for example a crepe paper tape made conductive by graphite or carbon black, optionally in combination with a swellable nonwoven tape. This conductive tape 5 serves practically as a cushion layer for the screen 6 located above it from z. B. copper wires, which are also wrapped by a so-called transverse helix made of copper. The tape 7 designed according to the invention, also swellable nonwoven, is used to block the shield area and to prevent it from being passed on to the cable at one point. ensures constant contact between the screen 6 and the metallic sheath 8 arranged above the band 7. This metallic shell 8 is, for example, one on the polyethylene outer jacket 9 facing surface with a copolymer of ethylene or a hot melt adhesive coated aluminum tape, the tape edges overlap each other and which are glued together in the overlap area. In the extrusion of the polyethylene of the outer jacket, a permanent connection to the outer jacket takes place after the coating of the aluminum strip has melted and has hardened again after cooling.

Claims (7)

Längs- und querwasserdichtes elektrisches Energiekabel mit über der Leiterisolierung bzw. einer darüber befindlichen Leitschicht angeordnetem Schirm aus metallischen Drähten oder Bändern sowie einer geschlossenen metallischen Hülle als Querwassersperre im weiteren Schichtenaufbau, wobei der Schirmbereich bei Feuchtigkeitseinwirkung quellende Materialien enthält, dadurch gekennzeichnet, daß oberhalb des Schirmes mindestens ein quellfähiges Material und gleichzeitig leitfähige Einlagen enthaltendes Band vorgesehen ist.Longitudinal and transverse water-tight electrical energy cable with a shield made of metallic wires or strips arranged above the conductor insulation or a conductive layer above it, as well as a closed metallic sheath as a cross-water barrier in the further layer structure, the shield area containing swelling materials when exposed to moisture, characterized in that above the shield at least one swellable material and at the same time a tape containing conductive inserts is provided. Energiekabel nach Anspruch 1, dadurch gekennzeichnet, daß das Band ein quellfähiges Material enthaltendes und mit Metallpartikeln dotiertes Vliesband ist.Power cable according to claim 1, characterized in that the tape is a non-woven tape containing swellable material and doped with metal particles. Energiekabel nach Anspruch 2, dadurch gekennzeichnet, daß die Metallpartikel Metallflitter oder Fäden begrenzter Länge sind.Power cable according to claim 2, characterized in that the metal particles are metal flakes or threads of limited length. Energiekabel nach Anspruch 1, dadurch gekennzeichnet, daß das Band ein quellfähiges Material enthaltendes und mit metallischen Fäden oder Streifen durchwirktes Vliesband ist.Power cable according to claim 1, characterized in that the band is a non-woven band containing swellable material and interwoven with metallic threads or strips. Energiekabel nach Anspruch 1 oder einem der folgenden, dadurch gekennzeichnet, daß das quellfähige Materialien und leitfähige Einlagen enthaltende Band in Kabellängsrichtung verläuft.Power cable according to Claim 1 or one of the following, characterized in that the band containing swellable materials and conductive inserts runs in the longitudinal direction of the cable. Energiekabel nach Anspruch 1 oder einem der folgenden, dadurch gekennzeichnet, daß das quellfähige Materialien und leitfähige Einlagen enthaltende Band wendelförmig den Schirm umgibt.Power cable according to claim 1 or one of the following, characterized in that the band containing swellable materials and conductive inserts helically surrounds the screen. Energiekabel nach Anspruch 6, dadurch gekennzeichnet, daß zwei Bänder den Schirm in Form einer Kreuzwendel umgeben.Power cable according to claim 6, characterized in that two bands surround the screen in the form of a cross helix.
EP95109668A 1994-09-02 1995-06-22 Longitudinally and transversely watertight power cable Expired - Lifetime EP0700057B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4431221 1994-09-02
DE4431221A DE4431221A1 (en) 1994-09-02 1994-09-02 Longitudinal and cross-waterproof energy cable

Publications (3)

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EP0700057A2 true EP0700057A2 (en) 1996-03-06
EP0700057A3 EP0700057A3 (en) 1996-10-09
EP0700057B1 EP0700057B1 (en) 1998-10-21

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EP95109668A Expired - Lifetime EP0700057B1 (en) 1994-09-02 1995-06-22 Longitudinally and transversely watertight power cable

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EP (1) EP0700057B1 (en)
AT (1) ATE172573T1 (en)
DE (2) DE4431221A1 (en)
DK (1) DK0700057T3 (en)
ES (1) ES2125521T3 (en)
NO (1) NO953449L (en)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
EP0890961A3 (en) * 1997-07-10 1999-06-16 Alcatel Electric cable
EP1128396A1 (en) * 2000-02-28 2001-08-29 Nexans Electrical cable
WO2004006272A1 (en) * 2002-05-27 2004-01-15 Telefonaktiebolaget L M Ericsson (Publ) Cable with shielding strip
EP2317525A1 (en) * 2009-11-03 2011-05-04 Nexans Electric power cable for medium or high voltage
EP2034491A3 (en) * 2007-09-05 2012-04-11 HEW-KABEL GmbH Extremely flexible shielded electric data conductor

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
DE202008015693U1 (en) 2008-11-26 2009-02-19 Draka Comteq Berlin Gmbh & Co. Kg communication cable

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DE58907954D1 (en) * 1989-04-07 1994-07-28 Siemens Ag Extrudable polymer-based mixture for electrical cables and electrical cables with an inner jacket made of this mixture.
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0890961A3 (en) * 1997-07-10 1999-06-16 Alcatel Electric cable
EP1128396A1 (en) * 2000-02-28 2001-08-29 Nexans Electrical cable
WO2004006272A1 (en) * 2002-05-27 2004-01-15 Telefonaktiebolaget L M Ericsson (Publ) Cable with shielding strip
US7053309B2 (en) 2002-05-27 2006-05-30 Telefonaktiebolaget Lm Ericsson (Publ) Cable with shielding strip
CN1328734C (en) * 2002-05-27 2007-07-25 艾利森电话股份有限公司 Cable with shielding strip
EP1508145B1 (en) 2002-05-27 2016-02-24 NKT Cables Group A/S Cable with shielding strip
EP3002763B1 (en) 2002-05-27 2018-07-25 NKT Cables Group A/S An insulated electrical cable
EP2034491A3 (en) * 2007-09-05 2012-04-11 HEW-KABEL GmbH Extremely flexible shielded electric data conductor
EP2317525A1 (en) * 2009-11-03 2011-05-04 Nexans Electric power cable for medium or high voltage
WO2011054887A1 (en) * 2009-11-03 2011-05-12 Nexans Electric power cable for medium or high voltage
US9281102B2 (en) 2009-11-03 2016-03-08 Nexans Electric power cable for medium or high voltage

Also Published As

Publication number Publication date
EP0700057A3 (en) 1996-10-09
DE59503976D1 (en) 1998-11-26
ATE172573T1 (en) 1998-11-15
NO953449L (en) 1996-03-04
DE4431221A1 (en) 1996-03-07
DK0700057T3 (en) 1999-06-28
EP0700057B1 (en) 1998-10-21
NO953449D0 (en) 1995-09-01
ES2125521T3 (en) 1999-03-01

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