EP0815567B1 - Electric cable - Google Patents

Electric cable Download PDF

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Publication number
EP0815567B1
EP0815567B1 EP96905648A EP96905648A EP0815567B1 EP 0815567 B1 EP0815567 B1 EP 0815567B1 EP 96905648 A EP96905648 A EP 96905648A EP 96905648 A EP96905648 A EP 96905648A EP 0815567 B1 EP0815567 B1 EP 0815567B1
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EP
European Patent Office
Prior art keywords
metal screen
adhesive
cable
conductor
electric cable
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Revoked
Application number
EP96905648A
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German (de)
French (fr)
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EP0815567A1 (en
Inventor
Ewald Sarbach
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Studer Schweiz AG
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Studer Draht und Kabelwerk AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/023—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of helicoidally wound tape-conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/022—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of longitudinal lapped tape-conductors

Definitions

  • the invention relates to an electrical cable according to the preamble of Claim 1.
  • a generic electrical cable is suitable preferably as a medium voltage cable for voltages between 10 and 50 kV or also as high-voltage cable up to 420 kV.
  • a known electrical cable according to US-5,281,757 consists essentially of a centrally arranged, several copper or aluminum wires stranded together generated electrical conductor and ring-shaped from the latter enclosing multi-layer insulation, which from a Conductor surrounding first semiconductor layer, one made of an aging-resistant Plastic, for example made of cross-linked polyethylene, existing insulation sheath, a second semiconductor layer, a Swelling tape, a neutral conductor and one made of plastic manufactured outer jacket is manufactured.
  • the ring-shaped in cross section The neutral conductor is from a band around the source band, this completely enveloping metal foil tape formed with its band edges forms an overlap point. This metal foil is glued together at this point of overlap.
  • the aim is that the metal foil almost floating between the outer Sheath and the layer adjacent to the inside is arranged.
  • the metal foil almost floating between the outer Sheath and the layer adjacent to the inside is arranged.
  • there is a gap between the outer jacket and Metal foil is no longer given a full temperature conductivity, which in the event of a short circuit is more likely to destroy the Can lead metal foil.
  • the isolation through the Layer between the metal foil and the internal semiconductor not beneficial.
  • the object of the present invention is an electric cable according to the type described above to further develop that in the case of this being easier Manufacturing neither liquid nor moisture, especially Water vapor, can penetrate inside and with this one increased resistance to aging compared to conventional cables is achieved.
  • the object is characterized by the characterizing part of the claim 1 solved.
  • this metal screen is on its entire inside with a semiconductor designed Provide adhesive, which is designed as a film and before Finishing the cable attached to the inside of the metal screen is.
  • This electric cable according to the invention offers simple and consequently, cost-effective manufacture, absolute tightness especially before moisture and liquid penetration.
  • the inside of this metal shade protected against corrosion by the adhesive film attached to it.
  • FIG. 1 shows an electrical cable 10, which is particularly suitable for medium voltages in a voltage range between 10 and 50 kV or for high voltages up to 420 kV and one centrically arranged, made of several copper or aluminum wires 14 or the like produced electrical Conductor 12 and a multilayer enclosing it Isolation system includes.
  • the latter has a electrical conductor 12 surrounding semiconductor layer 15, one of these comprehensive insulation sleeve 16, an outer semiconductor layer 17, a metal shield which surrounds the latter and serves as a neutral conductor 20 and an outer jacket 18.
  • For the metal screen 20 is an aluminum foil tape is provided, which runs along the cable is placed around the outer semiconductor layer 17 and such Width that there is a along the cable 10th extending overlap point 22 forms.
  • the band edges overlap at an angle of at least 10 °, they could but overlap so far that this metal screen two or would be sheathed several times around the inside of the cable.
  • the metal screen 20 is at its overlap point 22 continuously over the entire cable length an adhesive 23 sealingly joined together and thus forms a liquid and vapor impermeable protective sleeve inside the cable.
  • the adhesive 23 is on the entire inside the metal screen 20 attached, advantageously as a semiconductor film trained and prior to manufacturing the cable by a pressing process glued to the inside of the metal screen 20.
  • the adhesive 23 exposes itself essentially an adhesive material and chemically produced carbon black and its formation as a semiconductor enables an electrical Contact from the metal screen to the outer semiconductor layer 17 in spite of the full range between them Adhesive film.
  • the outer semiconductor layer 17 and the metal screen 20 is also a semiconductor Source tape 19 inserted, which primarily has two functions. If the outer layer of the cable is damaged, which has, among other things, cracked the metal screen this swelling band 19 the water penetrating into the interior of the cable as well as the moisture and the strong swelling The same will cause the water to continue flowing in the longitudinal direction of the cable prevented.
  • this swelling band 19 due to its elastic design, a cushion function in particular the outer diameter when the cable is installed changing insulation sleeve 16 and this surrounding semiconductor layer 17.
  • This swelling band 19 is out a nonwoven fabric or the like with one on the inside like also plastic coating applied on the outside manufactured, the latter being mixed with carbon particles, which gives the source tape the semiconducting property as a whole to lend.
  • Such an electrical cable usually has an outside diameter between 10 and 70 millimeters. It will be single or used as a three-wire cable, in the latter case of application the three individual cables are stranded together and by are held together in a comprehensive coat.
  • the foil tape used as a metal screen can in principle also made of copper or another electrically conductive material be.
  • the point of overlap of this film strip must also do not necessarily run parallel to the conductor along the cable, but the film could also be helical or in a row following layers around the cable.

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  • Insulated Conductors (AREA)
  • Inorganic Insulating Materials (AREA)

Abstract

The electric cable (10) proposed consists of at least one electrical conductor (12) enclosed in a multi-layer insulation system comprising a semiconductor layer (15) surrounding the conductor (12), an insulating sheath (16) round the semiconductor layer (15), an outer semiconductor layer (17), a metal screen (20) round the outer semiconductor layer (17) and an outer casing (18). The metal screen (20), which acts as a neutral conductor, has an overlap (22) which extends along the cable and along which the screen (20) is sealed along its whole length, preferably by means of adhesive (23), thus forming a liquidtight and vapourproof protective sheath round the cable interior. The cable (10) proposed is easy and inexpensive to manufacture and offers a permanent seal against the ingress of moisture or liquid. In addition, the inside surface of the metal screen is protected against corrosion by an adhesive film attached to it.

Description

Die Erfindung betrifft ein Elektrokabel nach dem Oberbegriff des Anspruchs 1.The invention relates to an electrical cable according to the preamble of Claim 1.

Ein gattungsmässiges Elektrokabel eignet sich vorzugsweise als Mittelspannungskabel für Spannungen zwischen 10 und 50 kV oder auch als Hochspannungskabel bis 420 kV.A generic electrical cable is suitable preferably as a medium voltage cable for voltages between 10 and 50 kV or also as high-voltage cable up to 420 kV.

Ein bekanntes Elektrokabel gemäss der Druckschrift US-5,281,757 besteht im wesentlichen aus einem zentrisch angeordneten, aus mehreren miteinander verseilten Kupfer- oder Aluminiumdrähten erzeugten elektrischen Leiter und aus einer letzteren ringförmig umschliessenden mehrschichtigen Isolation, die aus einer den Leiter umgebenden ersten Halbleiterschicht, einer aus einem alterungsbeständigen Kunststoff, bspw. aus vernetztem Polyäthylen, bestehenden Isolationshülle, einer zweiten Halbleiterschicht, einem Quellband, einem Nulleiter und aus einem aus Kunststoff hergestellten Aussenmantel gefertigt ist. Der im Querschnitt ringförmige Nulleiter ist aus einem um das Quellband gelegten, dieses vollständig einhüllenden Metallfolienband gebildet, welches mit seinen Bandrändern eine Überlappungsstelle bildet. Diese Metallfolie ist dabei an dieser Überlappungsstelle aneinandergeklebt.A known electrical cable according to US-5,281,757 consists essentially of a centrally arranged, several copper or aluminum wires stranded together generated electrical conductor and ring-shaped from the latter enclosing multi-layer insulation, which from a Conductor surrounding first semiconductor layer, one made of an aging-resistant Plastic, for example made of cross-linked polyethylene, existing insulation sheath, a second semiconductor layer, a Swelling tape, a neutral conductor and one made of plastic manufactured outer jacket is manufactured. The ring-shaped in cross section The neutral conductor is from a band around the source band, this completely enveloping metal foil tape formed with its band edges forms an overlap point. This metal foil is glued together at this point of overlap.

Bei diesem bekannten mehrlagigen Kabel wird angestrebt, dass die Metallfolie annähernd schwimmend zwischen dem äusseren Mantel und der innen angrenzenden Schicht angeordnet ist. Hierbei ist aber nicht gewährleistet, dass bei einem Riss im Aussenmantel ein Eindringen von Flüssigkeit zwischen diesen und die Folie und damit ein Korridieren der Metallfolie verhindert wird. Ausserdem ist bei einer Spaltbildung zwischen Aussenmantel und Metallfolie eine Temperatur-Leitfähigkeit nicht mehr vollauf gegeben, was in einem Kurzschlussfall eher zu einer Zerstörung der Metallfolie führen kann. Ferner ist auch die Isolation durch die Schicht zwischen der Metallfolie und dem innenliegenden Halbleiter nicht vorteilhaft.In this known multi-layer cable, the aim is that the metal foil almost floating between the outer Sheath and the layer adjacent to the inside is arranged. Here However, there is no guarantee that a crack in the outer jacket an intrusion of fluid between these and the Foil and thus a correlation of the metal foil is prevented. In addition, there is a gap between the outer jacket and Metal foil is no longer given a full temperature conductivity, which in the event of a short circuit is more likely to destroy the Can lead metal foil. Furthermore, the isolation through the Layer between the metal foil and the internal semiconductor not beneficial.

Bei einem bekannten Starkstromkabel nach der Druckschrift DE- A-27 39 572 wird auf eine den Leiter umgebende Schicht eine Schutzhülle aufgeklebt, die beispielsweise aus einer Bleifolie und einer Kunststoffschicht, z.B. Polymer und/oder anderem, besteht. Diese Schutzhülle wird an einer Überlappungsstelle durch Kleben zusammengefügt. Dieses Aufkleben ist mit relativ grossem Arbeitsaufwand verbunden und bedingt, dass der Kleber dauerhaft zusammenhält, ansonsten bei einem Lösen desselben an der Überlappungsstelle der Schutz gegen Eindringen von Flüssigkeit nicht mehr gewährleistet ist. Darüberhinaus besteht bei diesem Stromkabel ein weiterer Nachteil darin, dass die Metallfolie und die den Aussenmantel bildende Polymerschicht die Aussenseite des Kabels mit der Überlappungsstelle bilden. Die mit dieser Überlappungssielle verbundene Erhöhung der Kabelrundung ist beim Durchziehen des Kabels durch einen Schacht oder ähnlichem einer verstärkten Abnutzung ausgesetzt, was rasch zu einer Beschädigung der Metallfolie führen kann.In a known power cable according to DE A-27 39 572 becomes a on a layer surrounding the conductor Protective cover glued on, for example from a lead foil and a plastic layer, e.g. Polymer and / or other. This protective cover is glued at an overlap point put together. This sticking is a relatively large amount of work connected and requires that the adhesive hold together permanently, otherwise when loosening it at the overlap point protection against the ingress of liquid is no longer guaranteed is. There is also a power cord Another disadvantage is that the metal foil and the outer jacket polymer layer forming the outside of the cable with the Form overlap. The one associated with this overlap serial Increasing the cable rounding is when pulling the cable through through a shaft or the like of increased wear exposed, quickly causing damage to the metal foil can lead.

Aufgabe der vorliegenden Erfindung besteht demgegenüber darin, ein Elektrokabel nach der eingangs beschriebenen Gattung derart weiterzubilden, dass bei diesem bei vorausgesetzter einfacher Herstellung weder Flüssigkeit noch Feuchtigkeit, insbesondere Wasserdampf, ins Innere eindringen können und mit diesem eine gegenüber den herkömmlichen Kabeln erhöhte Alterungsbeständigkeit erzielt wird.In contrast, the object of the present invention is an electric cable according to the type described above to further develop that in the case of this being easier Manufacturing neither liquid nor moisture, especially Water vapor, can penetrate inside and with this one increased resistance to aging compared to conventional cables is achieved.

Erfindungsgemäss ist die Aufgabe durch das Kennzeichen des Anspruchs 1 gelöst. According to the invention the object is characterized by the characterizing part of the claim 1 solved.

Bei einer sehr vorteilhaften Ausführung ist dieser Metallschirm an seiner gesamten Innenseite mit einem als Halbleiter konzipierten Klebstoff versehen, welcher als Folie ausgebildet ist und vor dem Fertigen des Kabels an die Innenseite des Metallschirms angebracht ist.In a very advantageous embodiment, this metal screen is on its entire inside with a semiconductor designed Provide adhesive, which is designed as a film and before Finishing the cable attached to the inside of the metal screen is.

Dieses erfindungsgemässe Elektrokabel bietet bei einfacher und demzufolge kostengünstiger Herstellung eine absolute Dichtigkeit insbesondere vor dem Eindringen von Feuchtigkeit und von Flüssigkeit. Darüberhinaus ist die Innenseite dieses Metallschirms durch die an ihr angebrachte Klebfolie gegen Korrosion geschützt.This electric cable according to the invention offers simple and consequently, cost-effective manufacture, absolute tightness especially before moisture and liquid penetration. In addition, the inside of this metal shade protected against corrosion by the adhesive film attached to it.

Ein Ausführungsbeispiel der Erfindung sowie weitere Vorteile derselben sind nachfolgend anhand der Zeichnung näher erläutert. Es zeigt:

Fig. 1
als einzige Figur eine perspektivische Darstellung eines erfindungsgemässen, stirnseitig im Schnitt veranschaulichten Elektrokabels.
An embodiment of the invention and further advantages thereof are explained in more detail below with reference to the drawing. It shows:
Fig. 1
the only figure is a perspective view of an electrical cable according to the invention, illustrated on the front side in section.

Fig.1 zeigt ein Elektrokabel 10, welches insbesondere für Mittelspannungen in einem Spannungsbereich zwischen 10 und 50 kV oder für Hochspannungen bis 420 kV eingesetzt wird und einen zentrisch angeordneten, aus mehreren miteinander verseilten Kupfer- oder Aluminiumdrähten 14 oder dergleichen erzeugten elektrischen Leiter 12 und einem diesen umschliessendes mehrschichtiges Isolations-System umfasst. Letzteres weist eine den elektrischen Leiter 12 umgebende Halbleiterschicht 15, eine diese umfassende Isolationshülle 16, eine äussere Halbleiterschicht 17, einen letztere umhüllenden, als Nulleiter dienenden Metallschirm 20 sowie einen Aussenmantel 18 auf. Für den Metallschirm 20 ist ein Aluminium-Folienband vorgesehen, welches entlang des Kabels um die äussere Halbleiterschicht 17 gelegt ist und eine solche Breite aufweist, dass es eine sich entlang des Kabels 10 erstreckende Überlappungsstelle 22 bildet. Die Bandränder überlappen sich dabei um einen Winkel von wenigstens 10°, sie könnten sich aber soweit überlappen, dass dieser Metall schirm zweioder mehrfach um das Kabelinnere ummantelt wäre.1 shows an electrical cable 10, which is particularly suitable for medium voltages in a voltage range between 10 and 50 kV or for high voltages up to 420 kV and one centrically arranged, made of several copper or aluminum wires 14 or the like produced electrical Conductor 12 and a multilayer enclosing it Isolation system includes. The latter has a electrical conductor 12 surrounding semiconductor layer 15, one of these comprehensive insulation sleeve 16, an outer semiconductor layer 17, a metal shield which surrounds the latter and serves as a neutral conductor 20 and an outer jacket 18. For the metal screen 20 is an aluminum foil tape is provided, which runs along the cable is placed around the outer semiconductor layer 17 and such Width that there is a along the cable 10th extending overlap point 22 forms. The band edges overlap at an angle of at least 10 °, they could but overlap so far that this metal screen two or would be sheathed several times around the inside of the cable.

Erfindungsgemäss ist der Metallschirm 20 an seiner Überappungsstelle 22 durchgehend über die gesamte Kabellänge mittels eines Klebstoffes 23 abdichtend zusammengefügt und bildet somit eine flüssigkeits- und dampfundurchlässige Schutzhülle des Kabelinnerns. Der Klebstoff 23 ist dabei an der gesamten Innenseite des Metall schirms 20 angebracht, vorteilhaft als Halbleiter-Folie ausgebildet und vor dem Fertigen des Kabels durch ein Pressverfahren an die Innenseite des Metallschirms 20 geklebt. Zweckmässigerweise setzt sich der Klebstoff 23 im wesentlichen aus einem Klebermaterial sowie aus chemisch erzeugtem Russ zusammen und dessen Ausbildung als Halbleiter ermöglicht einen elektrischen Kontakt vom Metallschirm zur äusseren Halbleiterschicht 17 trotz der zwischen diesen vollumfänglich befindlichen Klebfolie.According to the invention, the metal screen 20 is at its overlap point 22 continuously over the entire cable length an adhesive 23 sealingly joined together and thus forms a liquid and vapor impermeable protective sleeve inside the cable. The adhesive 23 is on the entire inside the metal screen 20 attached, advantageously as a semiconductor film trained and prior to manufacturing the cable by a pressing process glued to the inside of the metal screen 20. Conveniently the adhesive 23 exposes itself essentially an adhesive material and chemically produced carbon black and its formation as a semiconductor enables an electrical Contact from the metal screen to the outer semiconductor layer 17 in spite of the full range between them Adhesive film.

Vorteilhaft ist zwischen der äusseren Halbleiterschicht 17 und dem Metallschirm 20 ein ebenfalls als Halbleiter ausgebildetes Quellband 19 eingelegt, welchem primär zwei Funktionen zukommen. Bei einer Beschädigung der äusseren Schicht des Kabels, bei der unter anderem ein Riss des Metallschirms erfolgt ist, absorbiert dieses Quellband 19 das ins Kabelinnere eindringende Wasser wie auch die Feuchtigkeit und durch das starke Aufquellen desselben wird ein Weiterfliessen des Wassers in Längsrichtung des Kabels verhindert. Darüberhinaus übt dieses Quellband 19 aufgrund seiner elastischen Ausbildung eine Polsterfunktion insbesondere der im verlegten Zustand des Kabels im Aussendurchmesser sich verändernden Isolationshülle 16 und der diese umgebenden Halbleiterschicht 17 aus. Dieses Quellband 19 ist aus einem Vliesstoff oder dergleichen mit einer auf dessen Innen- wie auch auf der Aussenseite aufgetragenen Kunststoffbeschichtung gefertigt, wobei letzterer Kohlenstoffpartikel zugemischt sind, welche dem Quellband insgesamt die halbleitende Eigenschaft verleihen.It is advantageous between the outer semiconductor layer 17 and the metal screen 20 is also a semiconductor Source tape 19 inserted, which primarily has two functions. If the outer layer of the cable is damaged, which has, among other things, cracked the metal screen this swelling band 19 the water penetrating into the interior of the cable as well as the moisture and the strong swelling The same will cause the water to continue flowing in the longitudinal direction of the cable prevented. In addition, this swelling band 19 due to its elastic design, a cushion function in particular the outer diameter when the cable is installed changing insulation sleeve 16 and this surrounding semiconductor layer 17. This swelling band 19 is out a nonwoven fabric or the like with one on the inside like also plastic coating applied on the outside manufactured, the latter being mixed with carbon particles, which gives the source tape the semiconducting property as a whole to lend.

Bei der Herstellung eines solchen Elektrokabels 10 nach der Erfindung werden zunächst nacheinander die erste Halbleiterschicht 15, die Isolationshülle 16 sowie die äussere Halbleiterschicht 17 aufgezogen. Sodann wird das Quellband 19 um die äussere Halbleiterschicht 17 aufgebracht und darauffolgend der bandförmige Metallschirm 20 darum gelegt und an der Überlappungsstelle 22 durch Aufwärmen desselben beispielsweise auf annähernd 120° Celsius verklebt. Zuletzt wird der Aussenmantel 18, bei dem ein zähes Polyäthylen-Isolationsmaterial verwendet wird, um den Metallschirm 20 aufgezogen, wobei zur Schaffung einer einwandfreien Haftung dieses Aussenmantels an dem Metallschirm vorteilhaft beim Aufziehen zwischen diesen ein Unterdruck oder ein Teilvakuum erzeugt wird, oder der Aussenmantel 18 mittels einer Press-Extrusion auf den Metallschirm 20 aufgebracht wird, bei dem dieser mit Druck auf den Metallschirm aufgezogen wird.In the manufacture of such an electrical cable 10 according to the invention become the first semiconductor layer one after the other 15, the insulation sleeve 16 and the outer semiconductor layer 17 raised. Then the swelling tape 19 is around the outer semiconductor layer 17 applied and then the band-shaped Metal screen 20 placed around it and at the overlap point 22 by warming it up to approximately 120 °, for example Celsius glued. Finally, the outer jacket 18, in which a tough polyethylene insulation material is used to the Metal screen 20 pulled up, creating a flawless Adhesion of this outer jacket to the metal screen advantageous when pulling between them a vacuum or a partial vacuum is generated, or the outer jacket 18 by means of a press extrusion is applied to the metal screen 20, where it is pulled onto the metal screen with pressure.

Ein solches Elektrokabel weist in der Regel einen Aussendurchmesser zwischen 10 und 70 Millimetern auf. Es wird einzeln oder als Dreileiterkabel verwendet, wobei in letzterem Anwendungsfalle die drei Einzelkabel miteinander verseilt werden und von einem diese umfassenden Mantel zusammengehalten sind.Such an electrical cable usually has an outside diameter between 10 and 70 millimeters. It will be single or used as a three-wire cable, in the latter case of application the three individual cables are stranded together and by are held together in a comprehensive coat.

Das als Metallschirm verwendete Folienband kann im Prinzip auch aus Kupfer oder einem andern elektrisch leitenden Material gefertigt sein. Auch die Überlappungsstelle dieses Folienbandes muss nicht zwingend entlang des Kabels parallel zum Leiter verlaufen, sondern die Folie könnte auch wendelförmig oder in hintereinander folgenden Lagen um das Kabel gewickelt sein.The foil tape used as a metal screen can in principle also made of copper or another electrically conductive material be. The point of overlap of this film strip must also do not necessarily run parallel to the conductor along the cable, but the film could also be helical or in a row following layers around the cable.

Theoretisch könnten drei von jeweils einer Halbleiterschicht umgebene elektrische Leiter in einem Abstand zueinander angeordnet und dabei von einem Isolationsmaterial umgeben sein. Diese drei Leiter wären dann insgesamt von einem um diese führenden Metallschirm ummantelt, welcher wiederum eine Überlappungsstelle aufweisen würde, die mittels eines an der Innenseite des Metallschirms vorgesehenen Klebstoffes über die gesamte Kabellänge eine hermetisch dichte Verbindung der übereinander angeordneten Bandränder bilden würde.Theoretically, three could be surrounded by a semiconductor layer electrical conductors spaced from each other and be surrounded by an insulation material. These three In total, conductors would be of a metal screen leading around this encased, which in turn is an overlap point would have, which by means of on the inside of the metal screen provided adhesive over the entire cable length a hermetically sealed connection of the one above the other Would form band edges.

Claims (7)

  1. Electric cable, with at least one electric conductor (12) and a multilayer insulation system surrounding the latter, which system comprises a conductor (12), surrounded by a semi-conductor layer (15), an insulation casing (16) surrounding the latter, an outer semi-conductor layer (17), a metal screen neutral conductor (20) as well as an outer sheathing (18), the metal screen (20) being provided with an overlapping point (22) extending along the cable, at which the metal screen (20) is joined together in a sealed manner continuously over the entire length of the cable preferably by means of an adhesive (23) an thus forms a protective casing for the inside of the cable, which is impermeable to liquid and vapour, characterized by the combination of the following features: that a swelling strip (19) provided inside the metal screen neutral conductor (20) is consisted to be semi-conducting, in which water or moisture can be absorbed and which is able to swell up when water is absorbed, and in addition the adhesive (23) is made from a semi-conductor material,
    that the outer sheathing (18) is applied to the metal screen (20), in that at least a partial vacuum is produced between these for the purpose of creating trouble-free adhesion of the outer sheathing to the metal screen, or
    that the outer sheathing (18) is applied to the metal screen (20) by means of a press extrusion, in which the outer sheathing is applied with pressure to the metal screen (20).
  2. Electric cable according to Claim 1, characterized in that the metal screen (20) is provided over its entire inner side with an adhesive (23).
  3. Electric cable according to Claim 1, characterized in that the adhesive (23) is applied as a foil to the inside of the metal screen (20).
  4. Electric cable according to Claim 1, characterized in that the adhesive (23) consisting essentially of an adhesive material as well as of a chemically produced carbon black which is mixed with the adhesive material.
  5. Electric cable according to one of the preceding claims, characterized in that for the metal screen (20) a foil strip consisting of aluminium or copper is used, this foil strip laid along the cable (10) around the outer semi-conductor layer (17) and having such a width that it forms the overlapping point (22) extending along the cable (10).
  6. Electric cable according to one of the preceding claims, characterized in that the swelling strip (19) is made from a fleece material or the like with a synthetic coating applied to its inside as well as to the outside, carbon particles being mixed with the latter, which give the swelling strip as a whole the semi-conducting property.
  7. Electric cable according to one of the preceding claims, characterized in that the adhesive (23) can be struck to the metal screen (20) at a temperature approximately higher than 80° Celsius.
EP96905648A 1995-03-14 1996-03-12 Electric cable Revoked EP0815567B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH00721/95A CH690473A5 (en) 1995-03-14 1995-03-14 Electrical cable.
CH721/95 1995-03-14
PCT/CH1996/000091 WO1996028830A1 (en) 1995-03-14 1996-03-12 Electric cable

Publications (2)

Publication Number Publication Date
EP0815567A1 EP0815567A1 (en) 1998-01-07
EP0815567B1 true EP0815567B1 (en) 1999-02-03

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Application Number Title Priority Date Filing Date
EP96905648A Revoked EP0815567B1 (en) 1995-03-14 1996-03-12 Electric cable

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EP (1) EP0815567B1 (en)
AT (1) ATE176547T1 (en)
AU (1) AU4936096A (en)
CH (1) CH690473A5 (en)
DE (1) DE59601264D1 (en)
WO (1) WO1996028830A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH708133B1 (en) * 2013-06-03 2017-06-30 Leoni Studer Ag Electric cables, in particular for solar or wind power plants.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE401874B (en) * 1976-09-15 1978-05-29 Asea Ab POWER POWER CABLE
FI863463A (en) * 1985-08-30 1987-03-01 Kable Tapes Ltd SKYDDSTEJP FOER ELEKTRISKA KRAFTKABLAR.
US5281757A (en) * 1992-08-25 1994-01-25 Pirelli Cable Corporation Multi-layer power cable with metal sheath free to move relative to adjacent layers

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EP0815567A1 (en) 1998-01-07
AU4936096A (en) 1996-10-02
WO1996028830A1 (en) 1996-09-19
ATE176547T1 (en) 1999-02-15
DE59601264D1 (en) 1999-03-18
CH690473A5 (en) 2000-09-15

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