EP0815567A1 - Electric cable - Google Patents

Electric cable

Info

Publication number
EP0815567A1
EP0815567A1 EP96905648A EP96905648A EP0815567A1 EP 0815567 A1 EP0815567 A1 EP 0815567A1 EP 96905648 A EP96905648 A EP 96905648A EP 96905648 A EP96905648 A EP 96905648A EP 0815567 A1 EP0815567 A1 EP 0815567A1
Authority
EP
European Patent Office
Prior art keywords
metal screen
cable
adhesive
semiconductor layer
cable according
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
EP96905648A
Other languages
German (de)
French (fr)
Other versions
EP0815567B1 (en
Inventor
Ewald Sarbach
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.)
Studer Schweiz AG
Original Assignee
Studer Draht und Kabelwerk AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Studer Draht und Kabelwerk AG filed Critical Studer Draht und Kabelwerk AG
Publication of EP0815567A1 publication Critical patent/EP0815567A1/en
Application granted granted Critical
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Anticipated expiration legal-status Critical
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Links

Classifications

    • 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 with at least one electrical conductor and a multi-layer insulation system enclosing it, which has an insulation sheath, at least one semiconductor layer, a metal shield enveloping it and an outer jacket, the metal shield serving as a neutral conductor having a along the Cable extending overlap point is provided.
  • An electrical cable of the generic type according to Swiss patent application No. 00 610 / 92-4 is preferably suitable as a medium voltage cable for voltages between 10 and 50 kV or as a high voltage cable up to 420 kV.
  • a centrally arranged electrical conductor produced from a plurality of copper or aluminum wires stranded together and from a multilayer insulation which surrounds the latter in an annular manner, which consists of a first semiconductor layer surrounding the conductor, and one made of an aging-resistant plastic, for example of cross-linked polyethylene , existing insulating sleeve, a second semiconductor layer, a swelling tape, a neutral conductor and an outer jacket made of plastic.
  • the neutral conductor which is ring-shaped in cross section, is formed from a metal foil strip which is wrapped around the swelling band and completely envelops it and which forms an overlap point with its band edges.
  • This known electrical cable which can be single-core or a three-conductor cable, can be manufactured in an extremely compact manner and has a high resistance to aging.
  • the same When the same is laid, for example, in a cable pipe or the like laid in the ground, it is constantly exposed to moist ambient air in many applications and, despite the outer sheath consisting of plastic, water vapor particles can infiltrate in this, thereby increasing the service life of this insulation and thus of the cable can decrease.
  • the object of the present invention is to develop an electrical cable of the type described in the introduction in such a way that, with simple manufacture presupposed, neither liquid nor moisture, in particular water vapor, can penetrate into the interior and achieve an increased resistance to aging compared to conventional cables becomes.
  • the object is achieved in that the metal screen is joined at its overlap point in a sealing manner throughout the entire cable length, preferably by means of an adhesive, and thus forms a liquid and vapor-barrier protective sheath of the cable interior.
  • the entire inside of this metal screen is provided with an adhesive designed as a semiconductor, which is designed as a film and is attached to the inside of the metal screen before the cable is manufactured.
  • This electrical cable according to the invention offers absolute tightness, in particular in the case of simple and therefore inexpensive production, in particular before moisture and liquid penetrate.
  • the inside of this metal screen is protected against corrosion by the adhesive film attached to it.
  • FIG. 1 is the only figure showing a perspective view of an electrical cable according to the invention, illustrated in section on the end face.
  • FIG. 1 shows an electrical cable 10, which is used in particular for medium voltages in a voltage range between 10 and 50 kV or for high voltages up to 420 kV, and an electrically arranged center made of a plurality of copper or aluminum wires 14 or the like which are stranded together ⁇ trical conductor 12 and a multi-layer insulation system enclosing this.
  • the latter has a semiconductor layer 15 surrounding the electrical conductor 12, an insulation sleeve 16 encompassing it, an outer semiconductor layer 17, a metal shield 20 enveloping the latter and serving as a neutral conductor, and an outer jacket 18.
  • An aluminum foil strip is provided for the metal screen 20, which is placed along the cable around the outer semiconductor layer 17 and has such a width that it forms an overlap point 22 extending along the cable 10.
  • the band edges over lapping at an angle of at least 10 °, but they could overlap to such an extent that this metal screen would be sheathed two or more times around the interior of the cable.
  • the metal screen 20 is joined at its overlap point 22 in a sealing manner over the entire cable length by means of an adhesive 23 and thus forms a liquid and vapor impermeable protective sheath for the inside of the cable.
  • the adhesive 23 is applied to the entire inside of the metal screen 20, advantageously in the form of a semiconductor film, and is glued to the inside of the metal screen 20 by a pressing process before the cable is manufactured.
  • the adhesive 23 expediently consists essentially of an adhesive material and of chemically produced carbon black, and its formation as a semiconductor enables electrical contact from the metal screen to the outer semiconductor layer 17, despite the adhesive film located between them in full.
  • a swelling band 19 likewise formed as a semiconductor, is advantageously inserted, which primarily has two functions.
  • this swelling band 19 absorbs the water penetrating into the cable interior as well as the moisture, and the strong swelling of the latter causes the water to continue flowing in the longitudinal direction of the cable prevented.
  • this swelling tape 19 performs a cushioning function, in particular the insulation sleeve 16, which changes in the outer diameter when the cable is laid, and the semiconductor layer 17 surrounding it.
  • This swelling tape 19 is made of a nonwoven fabric or the like with a plastic coating applied to the inside as well as to the outside, the latter being mixed with carbon particles, which give the source tape the semiconducting property as a whole.
  • the first semiconductor layer 15, the insulation sheath 16 and the outer semiconductor layer 17 are first pulled on one after the other. Then the swelling tape 19 is applied around the outer semiconductor layer 17 and then the tape-shaped metal screen 20 is placed around it and glued to the overlap point 22 by heating it up, for example to approximately 120 ° Celsius. Finally, the outer jacket 18, in which a tough polyethylene insulation material is used, is drawn around the metal screen 20, with a vacuum or partial vacuum advantageously being created between these to create perfect adhesion of this outer jacket to the metal screen, or the Outer jacket 18 is applied to the metal screen 20 by means of a press extrusion, in which the metal screen 20 is pulled onto the metal screen with pressure.
  • Such an electrical cable generally has an outside diameter between 10 and 70 millimeters. It is used individually or as a three-wire cable, the three individual cables being twisted together in the latter application and being held together by a sheath comprising them.
  • the foil strip used as a metal screen can also be made of copper or another electrically conductive material.
  • the point of overlap of this film strip does not necessarily have to run parallel to the conductor along the cable, but the film could also be wound helically or in successive layers around the cable.

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

Elektrokabel Electrical cables
Die Erfindung betrifft ein Elektrokabel, mit mindestens einem elektrischen Leiter und einem diesen umschliessendes mehrschich¬ tiges Isolations-System, welches eine Isolationshülle, wenigstens eine Halbleiterschicht, einen diese umhüllenden Metallschirm sowie einen Aussenmantel aufweist, wobei der als Nulleiter dienende Metallschirm mit einer sich entlang des Kabels erstreckenden Überlappungsstelle versehen ist.The invention relates to an electrical cable with at least one electrical conductor and a multi-layer insulation system enclosing it, which has an insulation sheath, at least one semiconductor layer, a metal shield enveloping it and an outer jacket, the metal shield serving as a neutral conductor having a along the Cable extending overlap point is provided.
Ein gattungsmässiges Elektrokabel nach dem Schweizerischen Patentgesuch Nr. 00 610/92-4 eignet sich vorzugsweise als Mit¬ telspannungskabel für Spannungen zwischen 10 und 50 kV oder auch als Hochspannungskabel bis 420 kV. Es besteht im wesentli- chen aus einem zentrisch angeordneten, aus mehreren miteinander verseilten Kupfer- oder Aluminiumdrähten erzeugten elektrischen Leiter und aus einer letzteren ringförmig umschliessenden mehr¬ schichtigen Isolation, die aus einer den Leiter umgebenden ersten Halbleiterschicht, einer aus einem alterungsbeständigen Kunst¬ stoff, bspw. aus vernetztem Polyäthylen, bestehenden Isolations¬ hülle, einer zweiten Halbleiterschicht, einem Quellband, einem Nulleiter und aus einem aus Kunststoff hergestellten Aussenman¬ tel 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.An electrical cable of the generic type according to Swiss patent application No. 00 610 / 92-4 is preferably suitable as a medium voltage cable for voltages between 10 and 50 kV or as a high voltage cable up to 420 kV. There is essentially Chen from a centrally arranged electrical conductor produced from a plurality of copper or aluminum wires stranded together and from a multilayer insulation which surrounds the latter in an annular manner, which consists of a first semiconductor layer surrounding the conductor, and one made of an aging-resistant plastic, for example of cross-linked polyethylene , existing insulating sleeve, a second semiconductor layer, a swelling tape, a neutral conductor and an outer jacket made of plastic. The neutral conductor, which is ring-shaped in cross section, is formed from a metal foil strip which is wrapped around the swelling band and completely envelops it and which forms an overlap point with its band edges.
Dieses bekannte Elektrokabel, welches einadrig oder als Dreilei¬ terkabel ausgebildet sein kann, lässt sich äusserst kompakt her¬ stellen und weist eine hohe Alterungsbeständigkeit auf. Beim Verlegen desselben zum Beispiel in ein in die Erde verlegtes Ka¬ belrohr oder ähnlichem ist es in vielen Anwendungsfällen ständig einer feuchten Umgebungsluft ausgesetzt und es können trotz des aus Kunststoff bestehenden Aussenmantels in diesem Wasser¬ dampfteilchen infiltrieren, wodurch sich die Lebensdauer dieser Isolation und damit des Kabels verringern kann.This known electrical cable, which can be single-core or a three-conductor cable, can be manufactured in an extremely compact manner and has a high resistance to aging. When the same is laid, for example, in a cable pipe or the like laid in the ground, it is constantly exposed to moist ambient air in many applications and, despite the outer sheath consisting of plastic, water vapor particles can infiltrate in this, thereby increasing the service life of this insulation and thus of the cable can decrease.
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 Alterungsbestän¬ digkeit erzielt wird.In contrast, the object of the present invention is to develop an electrical cable of the type described in the introduction in such a way that, with simple manufacture presupposed, neither liquid nor moisture, in particular water vapor, can penetrate into the interior and achieve an increased resistance to aging compared to conventional cables becomes.
Erfindungsgemäss ist die Aufgabe dadurch gelöst, dass der Metall¬ schirm an seiner Überlappungsstelle durchgehend über die gesam¬ te Kabellänge vorzugsweise mittels eines Klebstoffes abdichtend zusammengefügt ist und somit eine flüssigkeits- und dampfsper¬ rende Schutzhülle des Kabelinnerns bildet. 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 ange¬ bracht ist.According to the invention, the object is achieved in that the metal screen is joined at its overlap point in a sealing manner throughout the entire cable length, preferably by means of an adhesive, and thus forms a liquid and vapor-barrier protective sheath of the cable interior. In a very advantageous embodiment, the entire inside of this metal screen is provided with an adhesive designed as a semiconductor, which is designed as a film and is attached to the inside of the metal screen before the cable is manufactured.
Dieses erfindungsgemässe Elektrokabel bietet bei einfacher und demzufolge kostengünstiger Herstellung eine absolute Dichtigkeit insbesondere vor dem Eindringen von Feuchtigkeit und von Flüs¬ sigkeit. Darüberhinaus ist die Innenseite dieses Metallschirms durch die an ihr angebrachte Klebfolie gegen Korrosion geschützt.This electrical cable according to the invention offers absolute tightness, in particular in the case of simple and therefore inexpensive production, in particular before moisture and liquid penetrate. In addition, the inside of this metal screen is 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:An embodiment of the invention and further advantages thereof are explained in more detail below with reference to the drawing. It shows:
Fig. l als einzige Figur eine perspektivische Darstellung eines er- findungsgemässen, stirnseitig im Schnitt veranschaulichten Elektrokabels.1 is the only figure showing a perspective view of an electrical cable according to the invention, illustrated in section on the end face.
Fig. l zeigt ein Elektrokabel 10, welches insbesondere für Mit¬ telspannungen in einem Spannungsbereich zwischen 10 und 50 kV oder für Hochspannungen bis 420 kV eingesetzt wird und einen zentrisch angeordneten, aus mehreren miteinander verseilten Kup¬ fer- oder Aluminiumdrähten 14 oder dergleichen erzeugten elek¬ trischen Leiter 12 und einem diesen umschliessendes mehr¬ schichtiges 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 Ka¬ bels 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 über- läppen sich dabei um einen Winkel von wenigstens 10°, sie könn¬ ten sich aber soweit überlappen, dass dieser Metallschirm zwei- oder mehrfach um das Kabelinnere ummantelt wäre.1 shows an electrical cable 10, which is used in particular for medium voltages in a voltage range between 10 and 50 kV or for high voltages up to 420 kV, and an electrically arranged center made of a plurality of copper or aluminum wires 14 or the like which are stranded together ¬ trical conductor 12 and a multi-layer insulation system enclosing this. The latter has a semiconductor layer 15 surrounding the electrical conductor 12, an insulation sleeve 16 encompassing it, an outer semiconductor layer 17, a metal shield 20 enveloping the latter and serving as a neutral conductor, and an outer jacket 18. An aluminum foil strip is provided for the metal screen 20, which is placed along the cable around the outer semiconductor layer 17 and has such a width that it forms an overlap point 22 extending along the cable 10. The band edges over lapping at an angle of at least 10 °, but they could overlap to such an extent that this metal screen would be sheathed two or more times around the interior of the cable.
Erfindungsgemäss ist der Metallschirm 20 an seiner Überap- pungsstelle 22 durchgehend über die gesamte Kabellänge mittels eines Klebstoffes 23 abdichtend zusammengefügt und bildet somit eine flüssigkeits- und dampfundurchlässige Schutzhülle des Ka- belinnerns. Der Klebstoff 23 ist dabei an der gesamten Innenseite des Metallschirms 20 angebracht, vorteilhaft als Halbleiter-Folie ausgebildet und vor dem Fertigen des Kabels durch ein Pressver¬ fahren an die Innenseite des Metallschirms 20 geklebt. Zweck- mässigerweise setzt sich der Klebstoff 23 im wesentlichen aus einem Klebermaterial sowie aus chemisch erzeugtem Russ zusam¬ men und dessen Ausbildung als Halbleiter ermöglicht einen elek¬ trischen Kontakt vom Metallschirm zur äusseren Halbleiterschicht 17 trotz der zwischen diesen vollumfänglich befindlichen Klebfolie.According to the invention, the metal screen 20 is joined at its overlap point 22 in a sealing manner over the entire cable length by means of an adhesive 23 and thus forms a liquid and vapor impermeable protective sheath for the inside of the cable. The adhesive 23 is applied to the entire inside of the metal screen 20, advantageously in the form of a semiconductor film, and is glued to the inside of the metal screen 20 by a pressing process before the cable is manufactured. The adhesive 23 expediently consists essentially of an adhesive material and of chemically produced carbon black, and its formation as a semiconductor enables electrical contact from the metal screen to the outer semiconductor layer 17, despite the adhesive film located between them in full.
Vorteilhaft ist zwischen der äusseren Halbleiterschicht 17 und dem Metallschirm 20 ein ebenfalls als Halbleiter ausgebildetes Quellband 19 eingelegt, welchem primär zwei Funktionen zukom¬ men. Bei einer Beschädigung der äusseren Schicht des Kabels, bei der unter anderem ein Riss des Metallschirms erfolgt ist, absor¬ biert dieses Quellband 19 das ins Kabelinnere eindringende Was¬ ser 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 ins¬ besondere der im verlegten Zustand des Kabels im Aussendurch- messer 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.Between the outer semiconductor layer 17 and the metal screen 20, a swelling band 19, likewise formed as a semiconductor, is advantageously inserted, which primarily has two functions. In the event of damage to the outer layer of the cable, in which, among other things, the metal screen has cracked, this swelling band 19 absorbs the water penetrating into the cable interior as well as the moisture, and the strong swelling of the latter causes the water to continue flowing in the longitudinal direction of the cable prevented. In addition, due to its elastic design, this swelling tape 19 performs a cushioning function, in particular the insulation sleeve 16, which changes in the outer diameter when the cable is laid, and the semiconductor layer 17 surrounding it. This swelling tape 19 is made of a nonwoven fabric or the like with a plastic coating applied to the inside as well as to the outside, the latter being mixed with carbon particles, which give the source tape the semiconducting property as a whole.
Bei der Herstellung eines solchen Elektrokabels 10 nach der Er¬ findung werden zunächst nacheinander die erste Halbleiterschicht 15, die Isolationshülle 16 sowie die äussere Halbleiterschicht 17 aufgezogen. Sodann wird das Quellband 19 um die äussere Halb¬ leiterschicht 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 ein¬ wandfreien 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, the first semiconductor layer 15, the insulation sheath 16 and the outer semiconductor layer 17 are first pulled on one after the other. Then the swelling tape 19 is applied around the outer semiconductor layer 17 and then the tape-shaped metal screen 20 is placed around it and glued to the overlap point 22 by heating it up, for example to approximately 120 ° Celsius. Finally, the outer jacket 18, in which a tough polyethylene insulation material is used, is drawn around the metal screen 20, with a vacuum or partial vacuum advantageously being created between these to create perfect adhesion of this outer jacket to the metal screen, or the Outer jacket 18 is applied to the metal screen 20 by means of a press extrusion, in which the metal screen 20 is pulled onto the metal screen with pressure.
Ein solches Elektrokabel weist in der Regel einen Aussendurch- messer zwischen 10 und 70 Millimetern auf. Es wird einzeln oder als Dreileiterkabel verwendet, wobei in letzterem Anwendungs¬ falle die drei Einzelkabel miteinander verseilt werden und von einem diese umfassenden Mantel zusammengehalten sind.Such an electrical cable generally has an outside diameter between 10 and 70 millimeters. It is used individually or as a three-wire cable, the three individual cables being twisted together in the latter application and being held together by a sheath comprising them.
Das als Metallschirm verwendete Folienband kann im Prinzip auch aus Kupfer oder einem andern elektrisch leitenden Material gefer¬ tigt sein. Auch die Überlappungsstelle dieses Folienbandes muss nicht zwingend entlang des Kabels parallel zum Leiter verlaufen, sondern die Folie könnte auch wendeiförmig oder in hinterein¬ ander folgenden Lagen um das Kabel gewickelt sein.In principle, the foil strip used as a metal screen can also be made of copper or another electrically conductive material. The point of overlap of this film strip does not necessarily have to run parallel to the conductor along the cable, but the film could also be wound helically or in successive layers around the cable.
Theoretisch könnten drei von jeweils einer Halbleiterschicht um¬ gebene 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 Me- tallschirm ummantelt, welcher wiederum eine Überlappungsstelle aufweisen würde, die mittels eines an der Innenseite des Metall¬ schirms vorgesehenen Klebstoffes über die gesamte Kabellänge eine hermetisch dichte Verbindung der übereinander angeordneten Bandränder bilden würde. Theoretically, three electrical conductors, each surrounded by a semiconductor layer, could be arranged at a distance from one another and thereby surrounded by an insulation material. These three leaders would then be from a total of encased in a metal screen, which in turn would have an overlap point which, by means of an adhesive provided on the inside of the metal screen, would form a hermetically sealed connection of the tape edges arranged one above the other over the entire cable length.

Claims

PATENTANSPRÜCHE PATENT CLAIMS
1. Elektrokabel, mit mindestens einem elektrischen Leiter (12) und einem diesen umschliessendes mehrschichtiges Isolations- System, welches eine Isolationshülle ( 16), wenigstens eine Halbleiterschicht ( 17), einen diese umhüllenden Metallschirm (20) sowie einen Aussenmantel ( 18) aufweist, wobei der als Nulleiter dienende Metallschirm (20) mit einer sich entlang des Kabels erstreckenden Überlappungsstelle (22) versehen ist, dadurch gekennzeichnet, dass der Metallschirm (20) an seiner Überlappungsstelle (22) durch¬ gehend über die gesamte Kabellänge vorzugsweise mittels eines Klebstoffes (23) abdichtend zusammengefügt ist und somit eine flüssigkeits- und dampfundurchlässige Schutzhülle des Kabelin- nerns bildet.1. Electric cable, with at least one electrical conductor (12) and a multilayer insulation system enclosing it, which has an insulation sheath (16), at least one semiconductor layer (17), a metal screen (20) enveloping it and an outer jacket (18), the metal screen (20) serving as neutral conductor being provided with an overlap point (22) extending along the cable, characterized in that the metal screen (20) at its overlap point (22) continuously over the entire cable length, preferably by means of an adhesive ( 23) is sealed together and thus forms a liquid and vapor impermeable protective sheath of the cable interior.
2. Elektrokabel nach Anspruch 1, dadurch gekennzeichnet, dass der Metallschirm (20) an seiner gesamten Innenseite mit einem Klebstoff (23) versehen ist. 2. Electric cable according to claim 1, characterized in that the metal screen (20) is provided on its entire inside with an adhesive (23).
3. Elektrokabel nach Anspruch 1 , dadurch gekennzeichnet, dass der Klebstoff (23) als Folie ausgebildet ist und vor dem Fertigen des Kabels an die Innenseite des Metallschirms (20) angebracht ist.3. Electric cable according to claim 1, characterized in that the adhesive (23) is designed as a film and is attached to the inside of the metal screen (20) before the cable is manufactured.
4. Elektrokabel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Klebstoff (23) aus einem Halb¬ leiter-Material hergestellt ist.4. Electric cable according to one of the preceding claims, characterized in that the adhesive (23) is made of a semiconductor material.
5. Elektrokabel nach Anspruch 4, dadurch gekennzeichnet, dass sich der Klebstoff (23) im wesentlichen aus einem Klebermaterial sowie aus einem diesem beigemischten, chemisch erzeugten Russ zusammensetzt.5. Electric cable according to claim 4, characterized in that the adhesive (23) is composed essentially of an adhesive material and a chemically produced carbon black mixed with it.
6. Elektrokabel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass für den Metallschirm (20) ein aus Aluminium oder Kupfer bestehendes Folienband verwendet wird, wobei dieses Folienband entlang des Kabels ( 10) um die äussere Halbleiterschicht ( 17) gelegt ist und eine solche Breite aufweist, dass es die entlang des Kabels ( 10) verlaufende Überlappungsstel¬ le (22) bildet.6. Electric cable according to one of the preceding claims, characterized in that an aluminum or copper foil strip is used for the metal screen (20), this foil strip being laid along the cable (10) around the outer semiconductor layer (17) and such Width that it forms the overlap (22) running along the cable (10).
7. Elektrokabel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das mehrschichtige Isolations- System eine den Leiter ( 12) umgebende Halbleiterschicht ( 15), eine diese umfassende Isolationshülle ( 16), eine äussere Halb¬ leiterschicht ( 17), ein Quellband ( 19), einen letzteres umhül¬ lenden Metallschirm (20) sowie einen Aussenmantel ( 18) auf¬ weist.7. Electrical cable according to one of the preceding claims, characterized in that the multilayer insulation system comprises a semiconductor layer (15) surrounding the conductor (12), an insulation sleeve (16) comprising this, an outer semiconductor layer (17), a swelling band ( 19), a metal screen (20) enveloping the latter and an outer jacket (18).
8. Elektrokabel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Klebstoff (23) mit dem Metall¬ schirm (20) verklebt, wenn er auf eine annähernd höher als 80° Celsius liegende Temperatur erwärmt wird. 8. Electrical cable according to one of the preceding claims, characterized in that the adhesive (23) with the Metall¬ screen (20) glued when it is heated to an approximately higher than 80 ° Celsius temperature.
9. Elektrokabel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass beim Aufziehen des Aussenmantels ( 18) auf den Metallschirm (20) zwischen diesen zumindest ein Teilvakuum zwecks Schaffung einer einwandfreien Haftung des Aussenmantels am Metallschirm erzeugt wird.9. Electric cable according to one of the preceding claims, characterized in that when the outer sheath (18) is pulled onto the metal screen (20), at least a partial vacuum is generated between them in order to create perfect adhesion of the outer jacket to the metal screen.
10. Elektrokabel nach einem der vorhergehenden Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Aussenmantel ( 18) mittels einer Press-Extrusion auf den Metallschirm (20) aufgebracht wird, bei dem dieser mit Druck auf den Metallschirm (20) aufgezogen wird. 10. Electrical cable according to one of the preceding claims 1 to 8, characterized in that the outer jacket (18) is applied by means of a press extrusion to the metal screen (20), in which the latter is pulled onto the metal screen (20) with pressure.
EP96905648A 1995-03-14 1996-03-12 Electric cable Revoked EP0815567B1 (en)

Applications Claiming Priority (3)

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

Publications (2)

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

Family

ID=4193643

Family Applications (1)

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

Country Status (6)

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

Families Citing this family (1)

* 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9628830A1 *

Also Published As

Publication number Publication date
EP0815567B1 (en) 1999-02-03
DE59601264D1 (en) 1999-03-18
CH690473A5 (en) 2000-09-15
ATE176547T1 (en) 1999-02-15
AU4936096A (en) 1996-10-02
WO1996028830A1 (en) 1996-09-19

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