EP0996014B1 - Isolated aerial cable with lightwaveguide - Google Patents

Isolated aerial cable with lightwaveguide Download PDF

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Publication number
EP0996014B1
EP0996014B1 EP99121001A EP99121001A EP0996014B1 EP 0996014 B1 EP0996014 B1 EP 0996014B1 EP 99121001 A EP99121001 A EP 99121001A EP 99121001 A EP99121001 A EP 99121001A EP 0996014 B1 EP0996014 B1 EP 0996014B1
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EP
European Patent Office
Prior art keywords
wires
cable according
sheath
overhead cable
overhead
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP99121001A
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German (de)
French (fr)
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EP0996014A1 (en
Inventor
Peter König
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Draka Comteq Draka Telekom GmbH and Co KG
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Draka Comteq Draka Telekom GmbH and Co KG
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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
    • H01B9/005—Power cables including optical transmission elements

Definitions

  • the present invention relates to an insulated electrical Overhead cable according to the preamble of claim 1.
  • Such an overhead cable is known. It deals this is a weatherproof insulated overhead line a solid crosslinked polyethylene (VPE) dielectric.
  • the ladder is usually made of aluminum or out a so-called Aldrey alloy. They are round, stranded and condensed. The individual wires are to one Bundle stranded. By means of a pressing the Ladder compression is achieved that at the Cable sheath bordering conductor surface virtually gore-free is trained. This creates a deviating from the round shape Cross section of the wires.
  • the cables can be in High voltage range of about 0.6 to 36 kV can be used.
  • the overhead line can, for example, four Conductor bundles are made, preferably by longitudinal Nubs of the dielectric an identification of the three phase conductors and the center point conductor can.
  • a typical line of this type is known, for example, under the name NFA2X 0.6 / 1kV.
  • a flame-retarding process is preferably used for the crosslinking of the insulation.
  • the individual wires can preferably correspond to DIN 48200.
  • the permissible tensile stress of such a line is about 5 to 15 kp / mm 2 .
  • the pressing of the wires is - as already mentioned - made in particular for the purpose that takes place at the transition point conductor / insulation as possible a gore-free system. This is important in that, in the opposite case, technological problems may arise in the implementation of the crosslinking of the insulation.
  • a high-voltage overhead line known in which at least one conductor element is replaced by a tubular element, in the multiple optical fibers are arranged loosely.
  • This tubular element is flattened as seen in the radial direction designed, leaving more room for evasive action the optical fiber is obtained.
  • the known High-voltage overhead line cable is not to an electrical line of the type mentioned.
  • the specific problem of a line of the aforementioned Art is, however, that the compression of the wires for generating the smooth contact surface on the cable sheath at Presence of an optical waveguide, or an in a tubular element arranged optical waveguide, would lead to damage of the loose tube.
  • the present invention is therefore based on the problem starting from the isolated described above Overhead cable to design this so that it at the same time for information and energy transmission can be used, but on the one hand its mechanical Properties and other things in particular the am Cable jacket adjacent, almost gore-free training of Conductor interface may not be affected.
  • the pre-profiled wrapping wires can advantageously according to the invention, on the one hand, with a high packing density the conductor wires in the cable a circumferential chambering the metal bundle with the integrated one or more Fiber optic (s) can be achieved, which are the metal beam protects against damage during pressing, On the other hand, it is also possible, the gore-free Formation of the conductor interface already by the profiled To reach wrapping wires.
  • the segmented, electrically conductive enclosing the metal beam Case is according to the invention almost gap-free, so that a high packing density of the wires in the overhead line cable is reached. On the one hand, this can cause the known compression the wires are easily used for cable production On the other hand, the cable production can Alternatively, however, without the known compression of the Wires take place.
  • a first, shown in Fig. 1 embodiment of an inventive. isolated electrical overhead cable has metallic conductors that are stranded into a bundle Wires 1, 2 exist.
  • the metallic ladder can preferably be made of aluminum or an aluminum-containing Alloy (so-called Aldrey wires) exist.
  • the wires 1, 2 may preferably have diameters or in the case of a non-circular shape a diameter equivalent cross sectional dimension in Range of about 5 to 15 mm.
  • the cable has a, made of a dielectric existing, surrounding the conductor outer cable sheath. 3 on, wherein the voltage applied to the cable sheath 3 wires 1 a have such a cross section deviating from the round shape, that the bordering on the cable sheath 3 conductor surface 4 is formed almost gore free.
  • these are compacted by compression.
  • the cable sheath 3 can with advantage of cross-linked, in particular from technologically low-cost producible flame-retardant, Polyethylene (VPE) consist, whereby the wall thickness of the cable sheath 3 preferably in the range of about 1 to 3 mm can lie.
  • VPE Polyethylene
  • other materials, in particular other thermoplastics, can be used with advantage as materials for the cable sheath 3.
  • a metal beam loader 5 arranged with integrated optical waveguides 6.
  • the metal beam 5 is so pre-profiled Envelope wires 2 stranded that these sheath wires 2 a nearly gap-free, segmented, electrically conductive, the metal artery 5 enclosing envelope 7 form.
  • the Envelope wires 2 are surrounded by the pressed wires 1, wherein the compressed wires 1 to the cable sheath form adjacent gusset-free conductor surface 4.
  • the sheath wires 2 in a preferred manner in each case in cross section in the form of a circular ring segment and thus form an annular sheath 7.
  • Such a geometric cross-sectional shape of the sheath 7 has favorable, the mechanical strength of the line substantially mitbemer, polar and axial Area inertia and also moments resistance, so that the sheath 7 both in torsion (stranding) or lateral pressure (compression) as well as train and bending (usual load case after installation, wind load, ice load) optimal protection for the inside Metal beam 5 forms.
  • the usually required by overhead lines of the type described mechanical strength parameters, in particular the required allowable tensile stress of about 5 to 15 kgf / mm 2 can be easily guaranteed. In a compression, in particular damage to the metal beam 5 can not occur.
  • the metal beam loader 5 is in the first embodiment as Stranded central element in the overhead line cable according to the invention. It should be longitudinally watertight protected against corrosion be what by introducing overhead line within the area enclosed by the cable sheath 3 cross section the overhead line cable can happen.
  • the smooth on Cable sheath 3 adjacent conductor surface 4 can in particular a controlled flame crosslinking of a polyethylene material of the cable sheath 3 without complications, i. without any problems caused by melting or evaporating Grease, be carried out because near the cable sheath 3 the formation of any cavities in the fat could invade, is excluded.
  • the metal beam loader 5 has a metallic sleeve 8, as protection and strain relief of optical fibers 6 serves.
  • This sleeve 8 of the metal beam loader 5 may preferably be formed from a tube, the tube in particular a diameter of 1 to 4 mm and a Wall thickness of 0.15 to 0.2 mm. It is production engineering advantageous if the metal beam 5 made of tubular steel, in particular stainless steel strip is prepared, which, preferably by means of a Lasers, longitudinally welded. Inside the metal bundle 5 can with radial play and especially with excess length relative to the sleeve 8 one or more, preferably 1 to 24 optical waveguide 6 may be arranged. By game and excess length, for example, due to the weather Temperature fluctuations occurring different Length expansions or contractions of the metallic Sleeve 8 and the material of the optical waveguide 6 bill carried.
  • the overhead line cable, the sheath wires 2 not surrounded by pressed wires 1 be, but the bordering on the cable sheath 3 smooth Conductor surface 4 can also by the wrapping wires. 2 be educated yourself.
  • the production step of pressing can be advantageously eliminated in this way.
  • a third embodiment of a erfindungeassien Illustrated overhead line goes that the loose tube 5 is not only a central element, but also in an asymmetric stranding with other wires within that of the pre-profiled ones Enveloping wires 2 formed segmented, electrically conductive sheath 7 can be stranded.
  • the fourth embodiment (Fig. 4) of an inventive Overhead cable shows that the invention a wealth of possible combinations for design an overhead line cable and thus a very broad spectrum for its application offers.
  • a metal beam 5 with integrated optical fibers 6 and several round wires 9 within the Envelope wires 2 arranged are - as in first embodiment - the voltage applied to the cable sheath 3 outer wires 1 compacted by compression.
  • the Invention is not limited to the illustrated embodiments limited, but includes all as defined in the claims. Invention falling versions.
  • an overhead line according to the invention also several, especially three or four, bundles of stranded wires 1, 2, 9 and metal bundles 5, each of a Cable sheath 3 are surrounded.
  • the skilled person may further appropriate features for constructive design of an overhead line according to the invention, so for example - as described above - a Phase identification by longitudinal knobs on the cable sheath 3, provide.
  • a Phase identification by longitudinal knobs on the cable sheath 3 provide.
  • one against abrasion and corrosion protective sheath for the metal beam 5 may additionally be provided.
  • the stranding of the wires 1, 2, 9 and the metal beam core (s) 5 may preferably be a so-called Helix stranding, but also another type of Stranding are used.

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  • Communication Cables (AREA)
  • Insulated Conductors (AREA)
  • Non-Insulated Conductors (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)

Abstract

An insulated overhead line cable has bundled stranded metal wire conductors surrounded by a dielectric sheath (3), the wires (1, 2) adjacent the sheath (3) having a non-round cross-section for forming an almost gap-free conductor face (4) adjoining the sheath (3). The cable contains a metallic bundle core (5) with one or more integrated light guides (6), the core (5) being stranded with enclosing wires (2) which are pre-profiled to form a segmented, electrically conductive sleeve (7). Preferably, the sheath (3) consists of cross-linked (especially flame cross-linked) polyethylene and the conductors consist of aluminium or an aluminium alloy.

Description

Die vorliegende Erfindung betrifft ein isoliertes elektrisches Freileitungskabel gemäß der Präambel des Anspruch 1.The present invention relates to an insulated electrical Overhead cable according to the preamble of claim 1.

Ein derartiges Freileitungskabel ist bekannt. Es handelt sich dabei um eine wetterfest isolierte Freileitung mit einem festen Dielektrikum aus vernetztem Polyethylen (VPE). Die Leiter bestehen in der Regel aus Aluminium bzw. aus einer sogenannten Aldrey-Legierung. Sie sind rund, mehrdrähtig und verdichtet. Die einzelnen Adern sind zu einem Bündel verseilt. Durch die mittels eines Verpressens der Leiter erfolgende Verdichtung wird erreicht, daß die an den Kabelmantel grenzenden Leiterfläche nahezu zwickelfrei ausgebildet ist. Dabei entsteht ein von der runden Form abweichender Querschnitt der Drähte. Die Kabel können im Hochspannungsbereich von etwa 0,6 bis 36 kV eingesetzt werden. Die Freileitung kann dabei beispielsweise aus vier Leiter-Bündeln bestehen, wobei vorzugsweise durch längslaufende Noppen des Dielektrikums eine Kennzeichnung der drei Phasenleiter und des Mittelpunktsleiters erfolgen kann.Such an overhead cable is known. It deals this is a weatherproof insulated overhead line a solid crosslinked polyethylene (VPE) dielectric. The ladder is usually made of aluminum or out a so-called Aldrey alloy. They are round, stranded and condensed. The individual wires are to one Bundle stranded. By means of a pressing the Ladder compression is achieved that at the Cable sheath bordering conductor surface virtually gore-free is trained. This creates a deviating from the round shape Cross section of the wires. The cables can be in High voltage range of about 0.6 to 36 kV can be used. The overhead line can, for example, four Conductor bundles are made, preferably by longitudinal Nubs of the dielectric an identification of the three phase conductors and the center point conductor can.

Eine typische Leitung dieser Art ist beispielsweise unter dem Namen NFA2X 0,6/1kV bekannt. Für die Vernetzung der Isolierung wird vorzugsweise ein Flammvernetzungs-Verfahren eingesetzt. Die Einzeldrähte können vorzugsweise der DIN 48200 entsprechen. Die zulässige Zugspannung einer solchen Leitung beträgt etwa 5 bis 15 kp/mm2. Die Verpressung der Drähte wird - wie bereits erwähnt - insbesondere zu dem Zweck vorgenommen, daß an der Übergangsstelle Leiter/Isolierung eine möglichst zwickelfreie Anlage erfolgt. Dies ist insofern von Bedeutung, als im gegenteiligen Fall technologische Probleme bei der Ausführung der Vernetzung der Isolierung entstehen können.A typical line of this type is known, for example, under the name NFA2X 0.6 / 1kV. For the crosslinking of the insulation, a flame-retarding process is preferably used. The individual wires can preferably correspond to DIN 48200. The permissible tensile stress of such a line is about 5 to 15 kp / mm 2 . The pressing of the wires is - as already mentioned - made in particular for the purpose that takes place at the transition point conductor / insulation as possible a gore-free system. This is important in that, in the opposite case, technological problems may arise in the implementation of the crosslinking of the insulation.

In der DE 40 27 538 A1 wird festgestellt, daß die Entwicklung bei Starkstromkabeln dazu geführt hat, daß für die Informationsübertragung in Anlagen der Energietechnik Lichtwellenleiter-Elemente in vielfältiger Weise von Elektrizitätsversorgungs-Unternehmen und von der Industrie genutzt werden. Bei identischen Wegen der Informations- und Energieübertragung sind heute bei Freileitungen, flexiblen Leitungstrossen und Dreileiterenergiekabeln integrierte Lichtwellenleiter-Elemente in Betrieb.In DE 40 27 538 A1 it is found that the development in power cables has led to that for the Information transmission in power engineering plants Fiber optic elements in many ways from Electricity supply companies and industry be used. With identical ways of information and Energy transmission today are overhead lines, flexible Cable lances and 3-wire power cables integrated Fiber optic elements in operation.

So ist aus der DE 44 36 304 A1 ein Hochspannungs-Freileitungsseil bekannt, bei dem mindestens ein Leiterelement durch ein rohrförmig ausgebildetes Element ersetzt ist, in dem mehrere Lichtwellenleiter lose angeordnet sind. Dieses rohrförmige Element ist in radialer Richtung gesehen abgeplattet ausgebildet, wodurch mehr Raum für Ausweichvorgänge der Lichtwellenleiter gewonnen wird. Bei dem bekannten Hochspannungs-Freileitungsseil handelt es sich jedoch nicht um eine elektrische Leitung der eingangs genannten Art. Die spezifische Problematik einer Leitung der eingangs genannten Art besteht aber darin, daß die Verpressung der Drähte zur Erzeugung der glatten Anlagefläche am Kabelmantel beim Vorhandensein eines Lichtwellenleiters, bzw. auch eines in einem rohrförmigen Element angeordneten Lichtwellenleiters, zu Beschädigungen der Bündelader führen würde.Thus, from DE 44 36 304 A1 a high-voltage overhead line known, in which at least one conductor element is replaced by a tubular element, in the multiple optical fibers are arranged loosely. This tubular element is flattened as seen in the radial direction designed, leaving more room for evasive action the optical fiber is obtained. In the known High-voltage overhead line cable is not to an electrical line of the type mentioned. The specific problem of a line of the aforementioned Art is, however, that the compression of the wires for generating the smooth contact surface on the cable sheath at Presence of an optical waveguide, or an in a tubular element arranged optical waveguide, would lead to damage of the loose tube.

Um den Schutz eines metallischen Lichtwellenleiter-Röhrchen zu erhöhen, ist es aus der EP 443 085 A1 auch bekannt, in einem Lichtwellenleiter-Freileiterseil, das in Hochspannungs-Freileitungsnetzen eingesetzt werden soll, eine gegen Abrieb und Korrosion schützende Hülle einzusetzen. Ein solcher Schutz erweist sich jedoch beim Verpressen von Leitern als unzulänglich. Die Erzielung einer hochdichten Leiterpackung ist hingegen bei den eingangs beschriebenen Freileitungskabeln unabdingbar notwendig, einesteils, um die möglichst relieffreie Grenzfläche zum Kabelmantel herzustellen, andereseits aber auch, damit die geforderten mechanischen Eigenschaften, insbesondere die zulässige Zugspannung, gewährleistet werden können, die auch bei Vorliegen einer Wind- oder einer Eislast die notwendige Stabilität des Kabels gewährleisten.To protect a metallic fiber optic tube it is also known from EP 443 085 A1, in an overhead optical fiber cable used in high voltage overhead transmission networks should be used, one against Wear abrasion and corrosion protective sheath. One However, such protection proves when pressing Ladders as inadequate. Achieving a high density Ladder packing is, however, in the above-described Overhead cables essential, partly in order the most reliable interface to the cable sheath on the other hand, however, so that the required mechanical properties, in particular the permissible Tension can be ensured, which is also at Presence of a wind or ice load the necessary Ensure stability of the cable.

Der vorliegenden Erfindung liegt somit das Problem zugrunde, ausgehend von dem eingangs beschriebenen isolierten Freileitungskabel, dieses derart auszugestalten, daß es gleichzeitig zur Informations- und zur Energieübertragung genutzt werden kann, wobei aber einerseits seine mechanischen Eigenschaften und andereseits insbesondere die am Kabelmantel anliegende, nahezu zwickelfreie Ausbildung der Leitergrenzfläche nicht beeinträchtigt werden dürfen.The present invention is therefore based on the problem starting from the isolated described above Overhead cable to design this so that it at the same time for information and energy transmission can be used, but on the one hand its mechanical Properties and other things in particular the am Cable jacket adjacent, almost gore-free training of Conductor interface may not be affected.

Erfindungsgemäß wird dies durch die Kombination von Merkmalen des keinnzeichnenden Teils des Anspruchs 1.This is achieved by the invention the combination of features of the non-marking Part of claim 1.

Durch die vorprofilierten Umhüllungsdrähte kann vorteilhafterweise gemäß der Erfindung einerseits bei hoher Packungsdichte der Leiterdrähte im Kabel eine umfangsgemäße Kammerung der Metallbündelader mit dem oder den integrierten Lichtwellenleiter(n) erreicht werden, die die Metallbündelader bei einem Verpressen vor Beschädigungen schützt, andererseits ist es aber auch möglich, die zwickelfreie Ausbildung der Leitergrenzfläche bereits durch die profilierten Umhüllungsdrähte zu erreichen. Die segmentierte, elektrisch leitende die Metallbündelader umschließende Hülle ist dabei erfindungsgemäß nahezu spaltfrei, so daß eine hohe Packungsdichte der Drähte im Freileitungskabel erreicht wird. Einerseits kann dadurch die bekannte Verpressung der Drähte problemlos zur Kabelherstellung eingesetzt werden, andererseits kann die Kabelherstellung alternativ jedoch auch ohne die bekannte Verpressung der Drähte erfolgen.Due to the pre-profiled wrapping wires can advantageously according to the invention, on the one hand, with a high packing density the conductor wires in the cable a circumferential chambering the metal bundle with the integrated one or more Fiber optic (s) can be achieved, which are the metal beam protects against damage during pressing, On the other hand, it is also possible, the gore-free Formation of the conductor interface already by the profiled To reach wrapping wires. The segmented, electrically conductive enclosing the metal beam Case is according to the invention almost gap-free, so that a high packing density of the wires in the overhead line cable is reached. On the one hand, this can cause the known compression the wires are easily used for cable production On the other hand, the cable production can Alternatively, however, without the known compression of the Wires take place.

Auf dieser möglichen Doppelfunktion der profilierten Umhüllungsdrähte basieren verschiedene vorteilhafte Ausgestaltungen der Erfindung, die in den Unteransprüchen enthalten sind und anhand der in den beiliegenden Zeichnungen dargestellten Ausführungsbeispiele näher erläutert werden. Dabei zeigen:

Fig. 1
einen Querschnitt durch eine erste Ausführung eines erfindungsgemäßen Freileitungskabels,
Fig. 2
einen Querschnitt durch eine zweite Ausführung eines erfindungsgemäßen Freileitungskabels,
Fig. 3
einen Querschnitt durch eine dritte Ausführung eines erfindungegemäßen Freileitungskabels,
Fig. 4
einen Querschnitt durch eine vierte Ausführung eines erfindungsgemäßen Freileitungskabels.
Based on this possible dual function of the profiled sheath wires, various advantageous embodiments of the invention are contained in the subclaims and will be explained in more detail with reference to the embodiments illustrated in the accompanying drawings. Showing:
Fig. 1
a cross section through a first embodiment of an overhead cable according to the invention,
Fig. 2
a cross section through a second embodiment of an overhead cable according to the invention,
Fig. 3
a cross section through a third embodiment of an inventive overhead line cable,
Fig. 4
a cross section through a fourth embodiment of an overhead cable according to the invention.

In den einzelnen Figuren 1 bis 4 sind gleiche Teile mit denselben Bezugsziffern versehen, so daß sie in der Regel auch nur einmal beschrieben werden.In the individual figures 1 to 4 are the same parts the same reference numerals, so that they are usually be described only once.

Eine erste, in Fig. 1 dargestellte Ausführung eines erfindungsgemäßen. isolierten elektrischen Freileitungskabels weist metallische Leiter auf, die aus zu einem Bündel verseilten Drähten 1, 2 bestehen. Die metallischen Leiter können vorzugsweise aus Aluminium oder einer aluminiumhaltigen Legierung (sog. Aldrey-Drähte) bestehen. Die Drähte 1, 2 können vorzugsweise Durchmesser bzw. bei unrunder Form eine dem Durchmesser äquivalente Querschnittsabmessung im Bereich von etwa 5 bis 15 mm aufweisen.A first, shown in Fig. 1 embodiment of an inventive. isolated electrical overhead cable has metallic conductors that are stranded into a bundle Wires 1, 2 exist. The metallic ladder can preferably be made of aluminum or an aluminum-containing Alloy (so-called Aldrey wires) exist. The wires 1, 2 may preferably have diameters or in the case of a non-circular shape a diameter equivalent cross sectional dimension in Range of about 5 to 15 mm.

Des weiteren weist das Kabel einen, aus einem Dielektrikum bestehenden, die Leiter umgebenden äußeren Kabelmantel 3 auf, wobei die am Kabelmantel 3 anliegenden Drähte 1 einen derart von der runden Form abweichenden Querschnitt besitzen, daß die an den Kabelmantel 3 grenzenden Leiterfläche 4 nahezu zwickelfrei ausgebildet ist. Zu diesem Zweck und um die Packungsdichte der Drähte 1 in der Leitung zu erhöhen, sind diese durch Verpressen verdichtet.Furthermore, the cable has a, made of a dielectric existing, surrounding the conductor outer cable sheath. 3 on, wherein the voltage applied to the cable sheath 3 wires 1 a have such a cross section deviating from the round shape, that the bordering on the cable sheath 3 conductor surface 4 is formed almost gore free. For this purpose and to increase the packing density of the wires 1 in the line, these are compacted by compression.

Der Kabelmantel 3 kann mit Vorteil aus vernetzem, insbesondere aus technologisch aufwandsarm herstellbarem flammvernetztem, Polyethylen (VPE) bestehen, wobei die Wanddicke des Kabelmantels 3 vorzugsweise im Bereich von etwa 1 bis 3 mm liegen kann. Selbstverständlich sind auch andere Werkstoffe, insbesondere andere thermoplastische Kunststoffe, mit Vorteil als Materialien für den Kabelmantel 3 einsetzbar.The cable sheath 3 can with advantage of cross-linked, in particular from technologically low-cost producible flame-retardant, Polyethylene (VPE) consist, whereby the wall thickness of the cable sheath 3 preferably in the range of about 1 to 3 mm can lie. Of course, other materials, in particular other thermoplastics, can be used with advantage as materials for the cable sheath 3.

In dem erfindungsgemäßen Freileitungskabel ist eine Metallbündelader 5 mit integrierten Lichtwellenleitern 6 angeordnet. Die Metallbündelader 5 ist derart mit vorprofilierten Umhüllungsdrähten 2 verseilt, daß diese Umhüllungsdrähte 2 eine nahezu spaltfreie, segmentierte, elektrisch leitende, die Metallbündelader 5 umschließende Hülle 7 bilden. Die Umhüllungsdrähte 2 sind von den verpreßten Drähten 1 umgeben, wobei die verpreßten Drähte 1 die an den Kabelmantel grenzende zwickelfreie Leiterfläche 4 bilden.In the overhead cable according to the invention is a metal beam loader 5 arranged with integrated optical waveguides 6. The metal beam 5 is so pre-profiled Envelope wires 2 stranded that these sheath wires 2 a nearly gap-free, segmented, electrically conductive, the metal artery 5 enclosing envelope 7 form. The Envelope wires 2 are surrounded by the pressed wires 1, wherein the compressed wires 1 to the cable sheath form adjacent gusset-free conductor surface 4.

In allen dargestellten Ausführungsbeispielen weisen die Umhüllungsdrähte 2 in bevorzugter Weise jeweils im Querschnitt die Form eines Kreisring-Segments auf und bilden so eine kreisringförmige Hülle 7. Eine solche geometrische Querschnittsform der Hülle 7 besitzt günstige, die mechanische Festigkeit der Leitung wesentlich mitbestimmende, polare und axiale Flächenträgheits- bzw. auch Widerstandsmomente, so daß die Hülle 7 sowohl bei Torsion (Verseilen) oder bei seitlichem Druck (Verpressen) als auch bei Zug und Biegung (üblicher Belastungsfall nach der Montage, Windlast, Eis-last) einen optimalen Schutz für die innenliegende Metallbündelader 5 bildet. Die üblicherweise von Freileitungen der eingangs beschriebenen Art geforderten mechanischen Festigkeitsparameter, insbesondere die geforderte zulässige Zugspannung von etwa 5 bis 15 kp/mm2, können so problemlos gewährleistet werden. Bei einer Verpressung können insbesondere Beschädigungen der Metallbündelader 5 nicht auftreten.In all the illustrated embodiments, the sheath wires 2 in a preferred manner in each case in cross section in the form of a circular ring segment and thus form an annular sheath 7. Such a geometric cross-sectional shape of the sheath 7 has favorable, the mechanical strength of the line substantially mitbestimmende, polar and axial Area inertia and also moments resistance, so that the sheath 7 both in torsion (stranding) or lateral pressure (compression) as well as train and bending (usual load case after installation, wind load, ice load) optimal protection for the inside Metal beam 5 forms. The usually required by overhead lines of the type described mechanical strength parameters, in particular the required allowable tensile stress of about 5 to 15 kgf / mm 2 , can be easily guaranteed. In a compression, in particular damage to the metal beam 5 can not occur.

Die Metallbündelader 5 ist in der ersten Ausführung als Zentralelement im erfindungsgemäßen Freileitungskabel verseilt. Sie sollte längswasserdicht gegen Korrosion geschützt sein, was durch Einbringen von Freileitungsfett innnerhalb des vom Kabelmantel 3 umschlossenen Querschnitts des Freileitungskabels geschehen kann. Durch die glatte am Kabelmantel 3 anliegende Leiterfläche 4 kann dabei insbesondere eine gesteuerte Flammvernetzung eines Polyethylen-Werkstoffes des Kabelmantels 3 komplikationslos, d.h. ohne eventuelle Probleme durch schmelzendes oder verdampfendes Fett, durchgeführt werden, da in der Nähe des Kabelmantels 3 die Bildung etwaiger Hohlräume, in die Fett eindringen könnte, ausgeschlossen ist.The metal beam loader 5 is in the first embodiment as Stranded central element in the overhead line cable according to the invention. It should be longitudinally watertight protected against corrosion be what by introducing overhead line within the area enclosed by the cable sheath 3 cross section the overhead line cable can happen. By the smooth on Cable sheath 3 adjacent conductor surface 4 can in particular a controlled flame crosslinking of a polyethylene material of the cable sheath 3 without complications, i. without any problems caused by melting or evaporating Grease, be carried out because near the cable sheath 3 the formation of any cavities in the fat could invade, is excluded.

Die Metallbündelader 5 weist eine metallische Hülse 8 auf, die als Schutz und zur Zugentlastung der Lichtwellenleiter 6 dient. Diese Hülse 8 der Metallbündelader 5 kann vorzugsweise aus einem Röhrchen gebildet sein, wobei das Röhrchen insbesondere einen Durchmesser von 1 bis 4 mm und eine Wandstärke von 0,15 bis 0,2 mm aufweist. Dabei ist es fertigungstechnisch von Vorteil, wenn die Metallbündelader 5 aus rohrförmig geformten Stahl-, insbesondere Edelstahlband hergestellt ist, das, in bevorzugter Weise mittels eines Lasers, längsverschweißt ist. Innerhalb der Metallbündelader 5 können mit radialem Spiel und insbesondere mit Überlänge gegenüber der Hülse 8 ein oder mehrere, vorzugsweise 1 bis 24 Lichtwellenleiter 6 angeordnet sein. Durch Spiel und Überlänge wird beispielsweise witterungsbedingt den bei Temperaturschwankungen auftretenden unterschiedlichen Längenausdehnungen - bzw. -kontraktionen der metallischen Hülse 8 und des Materials der Lichtwellenleiter 6 Rechnung getragen.The metal beam loader 5 has a metallic sleeve 8, as protection and strain relief of optical fibers 6 serves. This sleeve 8 of the metal beam loader 5 may preferably be formed from a tube, the tube in particular a diameter of 1 to 4 mm and a Wall thickness of 0.15 to 0.2 mm. It is production engineering advantageous if the metal beam 5 made of tubular steel, in particular stainless steel strip is prepared, which, preferably by means of a Lasers, longitudinally welded. Inside the metal bundle 5 can with radial play and especially with excess length relative to the sleeve 8 one or more, preferably 1 to 24 optical waveguide 6 may be arranged. By game and excess length, for example, due to the weather Temperature fluctuations occurring different Length expansions or contractions of the metallic Sleeve 8 and the material of the optical waveguide 6 bill carried.

Wie die in Fig. 2 dargestellte zweite Ausführungsform eines erfindungsgemäßes Freileitungskabels zeigt, müssen die Umhüllungsdrähte 2 nicht von verpreßten Drähten 1 umgeben sein, sondern die an den Kabelmantel 3 grenzende glatte Leiterfläche 4 kann auch durch die Umhüllungsdrähte 2 selbst gebildet sein. Der Fertigungsschritt des Verpressen kann auf diese Weise vorteilhafterweise entfallen.As shown in Fig. 2 second embodiment of a According to the invention, the overhead line cable, the sheath wires 2 not surrounded by pressed wires 1 be, but the bordering on the cable sheath 3 smooth Conductor surface 4 can also by the wrapping wires. 2 be educated yourself. The production step of pressing can be advantageously eliminated in this way.

Aus Fig. 3, die eine dritte Ausführungsform eines erfindungegemäßen Freileitungskabels veranschaulicht, geht hervor, daß die Bündelader 5 nicht nur als Zentralelement, sondern auch in einem asymmetrischen Verseilverbund mit anderen Drähten innerhalb der von den vorprofilierten Umhüllungsdrähten 2 gebildeten segmentierten, elektrisch leitenden Hülle 7 verseilt werden kann.From Fig. 3, a third embodiment of a erfindungegemäßen Illustrated overhead line, goes that the loose tube 5 is not only a central element, but also in an asymmetric stranding with other wires within that of the pre-profiled ones Enveloping wires 2 formed segmented, electrically conductive sheath 7 can be stranded.

Wie die zeichnerische Darstellung zeigt, ist bei dieser Ausführung eine Metallbündelader 5 mit integrierten Lichtwellenleitern 6 sowie mehrere Runddrähte 9 innerhalb der Umhüllungsdrähte 2 angeordnet. Auch mehrere Metallbündeladern 5 mit integrierten Lichtwellenleitern 6 können zusammen mit den Runddrähten 9 für eine Verseilung innerhalb der aus den Umhüllungsdrähten 2 gebildeten Hülle 7 vorgesehen sein. Anstelle von Runddrähten 9 können auch andere konzentrische Drähte vorgesehen werden. Auch bei dieser Ausführung kann der Fertigungsschritt des Verpressen vorteilhafterweise entfallen, da die zwickelfreie Ausbildung der Leitergrenzfläche 4 am Kabelmantel 3 durch die profilierten Umhüllungsdrähte 2 erzielt wird.As the graphic representation shows is with this Execution of a metal beam loader 5 with integrated optical waveguides 6 and several round wires 9 within the Envelope wires 2 arranged. Also several metal bundles 5 with integrated optical fibers 6 can together with the round wires 9 for a stranding within the sheath 7 formed from the sheath wires 2 is provided be. Instead of round wires 9 can also others concentric wires are provided. Also with this Execution, the production step of the pressing advantageously omitted since the gore-free training the conductor interface 4 on the cable sheath 3 through the profiled Envelope wires 2 is achieved.

Das vierte Ausführungsbeispiel (Fig. 4) eines erfindungsgemäßen Freileitungskabels zeigt auf, daß die Erfindung eine Fülle von Kombinationsmöglichkeiten zur Gestaltung eines Freileitungskabels und damit ein sehr breites Spektrum für dessen Einsatzbereich bietet. Bei dieser Ausführung sind einerseits - wie beim dritten Ausführungsbeispiel - eine Metallbündelader 5 mit integrierten Lichtwellenleitern 6 sowie mehrere Runddrähte 9 innerhalb der Umhüllungsdrähte 2 angeordnet, andererseits sind - wie beim ersten Ausführungsbeispiel - die am Kabelmantel 3 anliegenden äußeren Drähte 1 durch Verpressen verdichtet.The fourth embodiment (Fig. 4) of an inventive Overhead cable shows that the invention a wealth of possible combinations for design an overhead line cable and thus a very broad spectrum for its application offers. In this version on the one hand - as in the third embodiment - A metal beam 5 with integrated optical fibers 6 and several round wires 9 within the Envelope wires 2 arranged, on the other hand are - as in first embodiment - the voltage applied to the cable sheath 3 outer wires 1 compacted by compression.

Wie schon aus der vierten Ausführung deutlich wird, ist die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt, sondern umfaßt auch alle unter die in den Ansprüchen definierte. Erfindung fallenden Ausführungen. Beispielsweise könnte eine erfindungsgemäße Freileitung auch mehrere, insbesondere drei oder vier, Bündel von verseilten Drähten 1, 2, 9 und Metallbündeladern 5, die alle jeweils von einem Kabelmantel 3 umgeben sind, umfassen. As is clear from the fourth embodiment, is the Invention is not limited to the illustrated embodiments limited, but includes all as defined in the claims. Invention falling versions. For example could an overhead line according to the invention also several, especially three or four, bundles of stranded wires 1, 2, 9 and metal bundles 5, each of a Cable sheath 3 are surrounded.

Außerdem kann der Fachmann weitere zweckmäßige Merkmale zur konstruktiven Gestaltung einer erfindungsgemäßen Freileitung, so beispielsweise - wie eingangs beschrieben - eine Phasenkennzeichnung durch längslaufende Noppen am Kabelmantel 3, vorsehen. Auch eine gegen Abrieb und Korrosion schützende Hülle für die Metallbündelader 5 kann zusätzlich vorgesehen werden. Für die Verseilung der Drähte 1, 2, 9 und der Metallbündelader(n) 5 kann vorzugsweise eine sognannten Helix-Verseilung, aber auch eine andere Art der Verseilung zur Anwendung kommen.In addition, the skilled person may further appropriate features for constructive design of an overhead line according to the invention, so for example - as described above - a Phase identification by longitudinal knobs on the cable sheath 3, provide. Also one against abrasion and corrosion protective sheath for the metal beam 5 may additionally be provided. For the stranding of the wires 1, 2, 9 and the metal beam core (s) 5 may preferably be a so-called Helix stranding, but also another type of Stranding are used.

Claims (14)

  1. Insulated - electrical high-voltage overhead cable with metallic electrical conductors, in particular composed of aluminium or of an alloy containing aluminium, which comprise at least one bundle of twisted wires (1, 2, 9), and having an outer cable sheath (3) which is composed of a dielectric and surrounds the conductors, with at least those wires (1, 2) which make contact with the cable sheath (3) having a cross section which differs from the round shape such that they form a conductor surface with virtually no gaps adjacent to the cable sheath (3), characterized by at least one metal bundle core (5), which is arranged in the interior and comprises a metal sleeve (8) and at least one optical waveguide (6) which is arranged in the sleeve (8), with the metal bundle core (5) being twisted with preprofiled electrically conductive sheathing wires (2) in such a way that the sheathing wires (2) form a segmented, electrically conductive annular sleeve (7) which surrounds the metal bundle core (5) such that the sheathing wires (2) ensure optimum protection by absorbing the mechanical loads which occur during production and when loaded.
  2. Overhead cable according to Claim 1,
    characterized in that the sheathing wires (2) each have a cross section in the form of an annular segment, and form an annular sleeve (7).
  3. Overhead cable according to Claim 1 or 2,
    characterized in that the metal bundle core (5) with at least one integrated optical waveguide (6) is arranged centrally within the sheathing wires (2).
  4. Overhead cable according to Claim 1 or 2,
    characterized in that at least one metal bundle core (5) with at least one integrated optical waveguide (6) as well as two or more round wires (9) are arranged within the sheathing wires (2).
  5. Overhead cable according to one of Claims 1 to 4,
    characterized in that the sheathing wires (2) form the conductor surface (4) which is adjacent to the cable sheath (3).
  6. Overhead cable according to one of Claims 1 to 4,
    characterized in that the sheathing wires (2) are surrounded by pressed wires (1) with the pressed wires (1) forming the conductor surface (4) which is adjacent to the cable sheath (3).
  7. Overhead cable according to one of Claims 1 to 6,
    characterized in that the cable sheath (3) is composed of crosslinked, in particular flame-crosslinked, polyethylene (VPE).
  8. Overhead cable according to one of Claims 1 to 7,
    characterized by two or more, in particular three or four, bundles of twisted wires (1, 2, 9) and metal bundle cores (5), which are each surrounded by a cable sheath (3).
  9. Overhead cable according to one of Claims 1 to 8,
    characterized in that the wires (1, 2, 9) have diameters in the range from about 5 to 15 mm.
  10. Overhead cable according to one of Claims 1 to 9,
    characterized in that the cable sheath (3) has a wall thickness in the range from about 1 to 3 mm.
  11. Overhead cable according to one of Claims 1 to 10,
    characterized in that the metal bundle core (5) is protected by grease against corrosion such that it is longitudinally watertight.
  12. Overhead cable according to one of Claims 1 to 11,
    characterized in that the meal bundle core (5) has a sleeve (8) which is formed from a small tube, with the small tube in particular having a diameter of 1 to 4 mm and having a wall thickness of 0.15 to 0.2 mm.
  13. Overhead cable according to one of Claims 1 to 12,
    characterized in that the metal bundle core (5) is produced from steel strip which has been shaped into a tubular and is longitudinally welded, in particular by means of a laser.
  14. Overhead cable according to one of Claims 1 to 13,
    characterized in that 1 to 24 optical waveguides, in particular, are arranged within the metal bundle core (5) with radial play and, in particular, with an excess length in comparison to the sleeve (8).
EP99121001A 1998-10-20 1999-10-20 Isolated aerial cable with lightwaveguide Expired - Lifetime EP0996014B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29818646U DE29818646U1 (en) 1998-10-20 1998-10-20 Insulated electrical overhead line cable with fiber optic cable
DE29818646U 1998-10-20

Publications (2)

Publication Number Publication Date
EP0996014A1 EP0996014A1 (en) 2000-04-26
EP0996014B1 true EP0996014B1 (en) 2005-01-12

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EP99121001A Expired - Lifetime EP0996014B1 (en) 1998-10-20 1999-10-20 Isolated aerial cable with lightwaveguide

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EP (1) EP0996014B1 (en)
AT (1) ATE287094T1 (en)
DE (2) DE29818646U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020264498A1 (en) * 2019-06-28 2020-12-30 Schlumberger Technology Corporation Mechanically responsive fiber optic thread assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105679451A (en) * 2016-04-07 2016-06-15 江苏通光强能输电线科技有限公司 Cable temperature on-line monitoring fiber composite conductor

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Publication number Priority date Publication date Assignee Title
JPH09219117A (en) * 1996-02-08 1997-08-19 Fujikura Ltd Overhead earth-wire compounding power line and optical communication line

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
US5044722A (en) * 1988-12-05 1991-09-03 Kupferdraht-Isolierwerk Ag Self-supporting optical cable
JP2989854B2 (en) * 1990-06-13 1999-12-13 株式会社フジクラ Lightning resistant stranded wire

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09219117A (en) * 1996-02-08 1997-08-19 Fujikura Ltd Overhead earth-wire compounding power line and optical communication line

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020264498A1 (en) * 2019-06-28 2020-12-30 Schlumberger Technology Corporation Mechanically responsive fiber optic thread assembly
GB2599555A (en) * 2019-06-28 2022-04-06 Schlumberger Technology Bv Mechanically responsive fiber optic thread assembly
GB2599555B (en) * 2019-06-28 2024-02-07 Schlumberger Technology Bv Mechanically responsive fiber optic thread assembly

Also Published As

Publication number Publication date
ATE287094T1 (en) 2005-01-15
DE29818646U1 (en) 1999-02-11
EP0996014A1 (en) 2000-04-26
DE59911433D1 (en) 2005-02-17

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