SE1400140A1 - Power cable and method of manufacturing the same - Google Patents

Power cable and method of manufacturing the same Download PDF

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Publication number
SE1400140A1
SE1400140A1 SE1400140A SE1400140A SE1400140A1 SE 1400140 A1 SE1400140 A1 SE 1400140A1 SE 1400140 A SE1400140 A SE 1400140A SE 1400140 A SE1400140 A SE 1400140A SE 1400140 A1 SE1400140 A1 SE 1400140A1
Authority
SE
Sweden
Prior art keywords
rst
conductive core
power cable
section
joint member
Prior art date
Application number
SE1400140A
Other languages
Swedish (sv)
Inventor
Peter Maartensson
Thomas Worzyk
Original Assignee
Abb Technology Ltd
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
Application filed by Abb Technology Ltd filed Critical Abb Technology Ltd
Priority to SE1400140A priority Critical patent/SE1400140A1/en
Publication of SE1400140A1 publication Critical patent/SE1400140A1/en
Priority to PCT/EP2014/075219 priority patent/WO2015135605A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/021—Soldered or welded connections between two or more cables or wires
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B23K35/286—Al as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/302—Cu as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/017—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of aluminium or an aluminium alloy, another layer being formed of an alloy based on a non ferrous metal other than aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/12—Copper or alloys thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/18—Dissimilar materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/523—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases for use under water
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/029—Welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H01R4/625—Soldered or welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0207—Ultrasonic-, H.F.-, cold- or impact welding
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

POWER CABLE AND METHOD OF MANUFACTURING THE SAME. KRAFTKABEL OCH TILLVERKNINGSFORFARANDE DARAV. The present disclosure relates to a power cable () comprising a conductive core (a), and a sheath enclosing the conductive core (a), wherein the conductive core (a) comprises a first section (b) made of a first metal material and a second section (c) made of a second metal material, and wherein the conductive core (a) has a joint member (id) having a first end (e) made of the first material and a second end made (if) of the second material, the first end (e) connecting with the first section (b) and the second end (if) connecting with the second section (c), wherein the first end (e) and the second end (if) of the joint member (id) have been joined thermally.(Fig.)

Description

15 20 25 Hence, according to a first aspect of the present disclosure there is provided a power cable comprising: a conductive core, and a sheath enclosing the conductive core, wherein the conductive core comprises a first section made of a first metal material and a second section made of a second metal material, and wherein the conductive core has a joint member having a first end made of the first material and a second end made of the second material, the first end connecting with the first section and the second end connecting with the second section, wherein the first end and the second end of the joint member have been joined thermally. 15 20 25 Hence, according to a aspect rst aspect of the present disclosure there is provided a power cable comprising: a conductive core, and a sheath enclosing the conductive core, wherein the conductive core comprises a fi rst section made of a fi rst metal material and a second section made of a second metal material, and where the conductive core has a joint member having a end rst end made of the fi rst material and a second end made of the second material, the fi rst end connecting with the fi rst section and the second end connecting with the second section, where the fi rst end and the second end of the joint member have been joined thermally.

Installing a stiff joint of the prior art is usually combined with very significant costs since for example a laying ship and crew have to utilise several days for installation. By means of a join member that has a first end and a second end which are thermally connected, a join which is non-rigid compared to sleeve or collar solutions may be obtained, and which enables faster installation time.Installing a stiff joint of the prior art is usually combined with very significant costs since for example a laying ship and crew have to utilize several days for installation. By means of a join member that has a first end and a second end which are thermally connected, a join which is non-rigid compared to sleeve or collar solutions may be obtained, and which enables faster installation time.

According to one embodiment the first end of the joint member is welded to the first section of the conductive core.According to one embodiment the first end of the joint member is welded to the first section of the conductive core.

According to one embodiment the second end of the joint member is welded to the second section of the conductive core.According to one embodiment the second end of the joint member is welded to the second section of the conductive core.

According to one embodiment the first metal material is aluminium and the second metal material is copper.According to one embodiment the first metal material is aluminum and the second metal material is copper.

According to one embodiment the first end and the second end of the joint member are friction welded.According to one embodiment the first end and the second end of the joint member are friction welded.

According to one embodiment the power cable is a high voltage power cable.According to one embodiment the power cable is a high voltage power cable.

According to one embodiment the power cable is a subsea cable.According to one embodiment the power cable is a subsea cable.

According to a second aspect of the present disclosure there is provided a method of manufacturing a power cable, comprising: 10 15 20 25 a) providing a joint member having a first end made of a first metal material and a second end made of a second metal material, the first end and the second end being joined thermally, b) providing a first conductive core part made of a first metal material, c) providing a second conductive core part made of a second metal material, d) joining the first conductive core part with the first end of the joint member, e) joining the second conductive core part with the second end of the joint member, thereby obtaining a conductive core having a first section defined by the first conductive core part and a second section defined by the second conductive core part, and f) providing a sheath to enclose the conductive core.According to a second aspect of the present disclosure there is provided a method of manufacturing a power cable, comprising: 10 15 20 25 a) providing a joint member having a end rst end made of a fi rst metal material and a second end made of a second metal material, the end rst end and the second end being joined thermally, b) providing a fi rst conductive core part made of a fi rst metal material, c) providing a second conductive core part made of a second metal material, d) joining the fi rst conductive core part with the end rst end of the joint member, e) joining the second conductive core part with the second end of the joint member, thereby obtaining a conductive core having a fi rst section de fi ned by the fi rst conductive core part and a second section de fi ned by the second conductive core part, and f) providing a sheath to enclose the conductive core.

According to one embodiment the first end and the second end of the joint member are joined thermally.According to one embodiment the first end and the second end of the joint member are joined thermally.

According to one embodiment the first end and the second end of the joint member are joined by means of friction welding.According to one embodiment the fi rst end and the second end of the joint member are joined by means of friction welding.

According to one embodiment the first conductive core part is joined with the first end of the joint member by means of welding.According to one embodiment the conduct rst conductive core part is joined with the fi rst end of the joint member by means of welding.

According to one embodiment the second conductive core part is joined with the second end of the joint member by means of welding.According to one embodiment the second conductive core part is joined with the second end of the joint member by means of welding.

According to one embodiment the first metal material is aluminium and the second metal material is copper.According to one embodiment the first metal material is aluminum and the second metal material is copper.

According to one embodiment the power cable is a high voltage power cable.According to one embodiment the power cable is a high voltage power cable.

According to one embodiment the power cable is a subsea cable. 10 15 20 25 Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/ an/ the element, apparatus, component, means, etc. are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, etc., unless explicitly stated otherwise. Moreover, the steps of the method need not necessarily have to be carried out in the indicated order unless explicitly stated.According to one embodiment the power cable is a subsea cable. 10 15 20 25 Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical fi eld, unless explicitly de fi ned otherwise herein. All references to "a / an / the element, apparatus, component, means, etc. are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, etc., unless explicitly stated otherwise. Moreover , the steps of the method need not necessarily have to be carried out in the indicated order unless explicitly stated.

BRIEF DESCRIPTION OF THE DRAVVINGS The specific embodiments of the inventive concept will now be described, by way of example, with reference to the accompanying drawings, in which: Fig. 1 schematically depicts an example of power cable prior to assembly of different sections; F ig. 2a depicts the power cable in Fig. 1 in an assembled state; Fig. 2b shows another example of a power cable in an assembled state; and F íg. 3 is a flowchart of a method of manufacturing a power cable such as the power cable depicted in Figs 2a or 2b.BRIEF DESCRIPTION OF THE DRAVVINGS The speci fi c embodiments of the inventive concept will now be described, by way of example, with reference to the accompanying drawings, in which: Fig. 1 schematically depicts an example of power cable prior to assembly of different sections; F ig. 2a depicts the power cable in Fig. 1 in an assembled state; Fig. 2b shows another example of a power cable in an assembled state; and F íg. 3 is a ch owchart of a method of manufacturing a power cable such as the power cable depicted in Figs 2a or 2b.

DETAILED DESCRIPTION The inventive concept will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplifying embodiments are shown. The inventive concept may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art.DETAILED DESCRIPTION The inventive concept will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplifying embodiments are shown. The inventive concept may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art.

Like numbers refer to like elements throughout the description.Like numbers refer to like elements throughout the description.

Fig. 1a depicts a portion of a power cable 1 prior to assembly thereof. The power cable 1 comprises a sheath (not shown), a conductive core 1a having a first section 1b made of a first metal material, a second section 1c made of a 10 15 20 25 30 second metal material, and a joint member 1d. The sheath, which may be made of a polymer material for example, is arranged to enclose the conductive core 1a for the purpose of protection thereof. Moreover, the power cable may comprise one or more layers of armour wires protecting the conductive core. Depending on the number of electrical phases, a number of such conductive cores may be arranged within the sheath, for example one conductive core in case the power cable is a DC cable, and three conductive cores in case the power cable is a three-phase AC cable. However for the purpose of illustration, an example having only one conductive core 1a is shown in Fig. 1.Fig. 1a depicts a portion of a power cable 1 prior to assembly thereof. The power cable 1 comprises a sheath (not shown), a conductive core 1a having a section rst section 1b made of a fi rst metal material, a second section 1c made of a 10 15 20 25 30 second metal material, and a joint member 1d. The sheath, which may be made of a polymeric material for example, is arranged to enclose the conductive core 1a for the purpose of protection thereof. Moreover, the power cable may comprise one or more layers of armor wires protecting the conductive core. Depending on the number of electrical phases, a number of such conductive cores may be arranged within the sheath, for example one conductive core in case the power cable is a DC cable, and three conductive cores in case the power cable is a three-phase AC cable. However for the purpose of illustration, an example having only one conductive core 1a is shown in Fig. 1.

The joint member 1d is arranged to join the first section 1b with the second section 1c. To this end, the joint member 1d has a first end 1e made of the first metal material and a second end 1f made of the second metal material. The first end 1e and the second end 1f are joined thermally, for example by means of welding such as friction welding. Thus, initially, the joint member comprises two separate pieces, which are then thermally joined. The thermal joint is schematically shown by means of the dashed lines indicated by reference numeral 1g. Friction welding is obtained by rotating one of the first end 1e and the second end 1f relative to the other end. It would typically not be possible to utilise friction welding directly for the first section 1b and the second section 1c of the conductive core 1a without the joint member 1d because of the length of these section.The joint member 1d is arranged to join the section rst section 1b with the second section 1c. To this end, the joint member 1d has a end rst end 1e made of the fi rst metal material and a second end 1f made of the second metal material. The fi rst end 1e and the second end 1f are joined thermally, for example by means of welding such as friction welding. Thus, initially, the joint member comprises two separate pieces, which are then thermally joined. The thermal joint is schematically shown by means of the dashed lines indicated by reference numeral 1g. Friction welding is obtained by rotating one of the first end 1e and the second end 1f relative to the other end. It would typically not be possible to utilize friction welding directly for the section rst section 1b and the second section 1c of the conductive core 1a without the joint member 1d because of the length of these section.

The first section 1b is joined with the first end 1e. The first section 1b and the first end le are both made of the first metal material, and can thus easily be joined for example by heating, e.g. by means of welding.The section rst section 1b is joined with the fi rst end 1e. The fi rst section 1b and the fi rst end le are both made of the fi rst metal material, and can thus easily be joined for example by heating, e.g. by means of welding.

The second section 1c is joined with the second end 1f. The second section 1c and the second end 1f are both made of the second metal material, and can thus easily be joined for example by heating, e.g. by means of welding.The second section 1c is joined with the second end 1f. The second section 1c and the second end 1f are both made of the second metal material, and can thus easily be joined for example by heating, e.g. by means of welding.

The first metal material may for example be aluminium, and the second metal material may for example be copper. It is however envisaged that other 10 15 20 25 conductive metal materials could be used for the components of the conductive core 1a.The first metal material may for example be aluminum, and the second metal material may for example be copper. It is however envisaged that other 10 15 20 25 conductive metal materials could be used for the components of the conductive core 1a.

Fig. 2a depicts the power cable 1 in an assembled state, again without the sheath visible.Fig. 2a depicts the power cable 1 in an assembled state, again without the sheath visible.

Fig. 2b schematically depicts a portion of a power cable 2, with its sheath removed to expose a conductive core 2a. The power cable 2 thus comprising a conductive core 2a having a first section 2b which has a first diameter, and a second section 2c which has a second diameter, larger than the first diameter.Fig. 2b schematically depicts a portion of a power cable 2, with its sheath removed to expose a conductive core 2a. The power cable 2 thus comprising a conductive core 2a having a first section 2b which has a first diameter, and a second section 2c which has a second diameter, larger than the first diameter.

The conductive core 2a further comprises a joint member 2d which has a first end 2e joined with the first section 2b, having a diameter essentially corresponding to the first diameter, i.e. the diameter of the first section 2b.The conductive core 2a further comprises a joint member 2d which has a end rst end 2e joined with the fi rst section 2b, having a diameter essentially corresponding to the fi rst diameter, i.e. the diameter of the section rst section 2b.

The joint member 2d has a second end 2fjoined with the second section 2c, having a diameter essentially corresponding to the second diameter, i.e. the diameter of the second section 2c. The joint member 2 may thus enable the connection of the first section 2b and the section 2b in case they have different diameters.The joint member 2d has a second end 2fjoined with the second section 2c, having a diameter essentially corresponding to the second diameter, i.e. the diameter of the second section 2c. The joint member 2 may thus enable the connection of the first section 2b and the section 2b in case they have different diameters.

Similarly to the example described with reference to Fig. 1, the first part 2e and the second part 2f are joined thermally, for example by means of friction welding. Moreover, the first part 2e is joined with the first part 2b and the second part 2f is joined with the second part 2c in the same manner as previously described.Similarly to the example described with reference to Fig. 1, the fi rst part 2e and the second part 2f are joined thermally, for example by means of friction welding. Moreover, the part rst part 2e is joined with the fi rst part 2b and the second part 2f is joined with the second part 2c in the same manner as previously described.

A method of manufacturing a power cable such as power cable 1 or 2 will now be described with reference to Fig. 3. In a step a) a joint member having a first end made of a first metal material and a second end made of a second metal material are provided. The first end and the second end are joined thermally, In a step b) a first conductive core part made of a first metal material is provided. 10 15 In a step c) a second conductive core part made of a second metal material is provided.A method of manufacturing a power cable such as power cable 1 or 2 will now be described with reference to Fig. 3. In a step a) a joint member having a first end made of a first metal material and a second end made of a second metal materials are provided. The end rst end and the second end are joined thermally, In a step b) a fi rst conductive core part made of a fi rst metal material is provided. 10 15 In a step c) a second conductive core part made of a second metal material is provided.

In a step d) the first conductive core part is joined with the first end of the joint member.In a step d) the conduct rst conductive core part is joined with the fi rst end of the joint member.

In a step e) the second conductive core part is joined with the second end of the joint member. A conductive core having a first section defined by the first conductive core part and a second section defined by the second conductive core part is thereby obtained.In a step e) the second conductive core part is joined with the second end of the joint member. A conductive core having a first section de fi ned by the conduct rst conductive core part and a second section de fi ned by the second conductive core part is thereby obtained.

In a step f) a sheath is provided to enclose the conductive core.In a step f) a sheath is provided to enclose the conductive core.

It is envisaged that the power cable presented herein may be utilised in for example subsea applications e.g. power transmission or power distribution.It is envisaged that the power cable presented herein may be utilized in for example subsea applications e.g. power transmission or power distribution.

The power cable may for example be utilised for landfalls for subsea cables.The power cable may for example be utilized for landfalls for subsea cables.

The inventive concept has mainly been described above with reference to a few examples. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the inventive concept, as defined by the appended claims.The inventive concept has mainly been described above with reference to a few examples. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the inventive concept, as de fi ned by the appended claims.

Claims (15)

10 15 20 25 CLAIMS10 15 20 25 CLAIMS 1. A power cable (1; 2) comprising: a conductive core (1a; 2a) , and a sheath enclosing the conductive core (1a; 2a), wherein the conductive core (1a; 2a) comprises a flrst section (1b; 2b) made of a first metal material and a second section (1c; 2c) made of a second metal material, and wherein the conductive core (1a; 2a) has a joint member (1d; 2d) having a first end (1e; 2e) made of the first material and a second end (1f; 2f) made of the second material, the first end (1e; 2e) connecting with the first section (1b; 2b) and the second end (1f; 2f) connecting with the second section (1c; 2c), wherein the first end (1e; 2e) and the second end (1f; 2f) of the joint member (1d; 2d) have been joined thermally.1. A power cable (1; 2) comprising: a conductive core (1a; 2a), and a sheath enclosing the conductive core (1a; 2a), wherein the conductive core (1a; 2a) comprises a section rst section (1b; 2b) made of a metal rst metal material and a second section (1c; 2c) made of a second metal material, and wherein the conductive core (1a; 2a) has a joint member (1d; 2d) having a fi rst end (1e; 2e) made of the material rst material and a second end (1f; 2f) made of the second material, the fi rst end (1e; 2e) connecting with the fi rst section (1b; 2b) and the second end (1f; 2f) connecting with the second section (1c; 2c), where the fi rst end (1e; 2e) and the second end (1f; 2f) of the joint member (1d; 2d) have been joined thermally. 2. The power cable (1 ; 2) as claimed in claim 1, wherein the first end (1e; 2e) of the joint member (1d; 2d) is welded to the first section (1b; 2b) of the conductive core (1a; 2a).2. The power cable (1; 2) as claimed in claim 1, wherein the fi rst end (1e; 2e) of the joint member (1d; 2d) is welded to the fi rst section (1b; 2b) of the conductive core ( 1a; 2a). 3. The power cable (1; 2) as claimed in claim 1 or 2, wherein the second end (1f; 2f) of the joint member (1d; 2d) is welded to the second section (1c; 2c) of the conductive core (1a; 2a).3. The power cable (1; 2) as claimed in claim 1 or 2, wherein the second end (1f; 2f) of the joint member (1d; 2d) is welded to the second section (1c; 2c) of the conductive core (1a; 2a). 4. The power cable (1; 2) as claimed in any of the preceding claims, wherein the first metal material is aluminium and the second metal material is copper.4. The power cable (1; 2) as claimed in any of the preceding claims, wherein the fi rst metal material is aluminum and the second metal material is copper. 5. The power cable (1; 2) as claimed in any of the preceding claims, wherein the first end (1e; 2e) and the second end (1f; 2f) of the joint member (1d; 2d) are friction welded.5. The power cable (1; 2) as claimed in any of the preceding claims, wherein the fi rst end (1e; 2e) and the second end (1f; 2f) of the joint member (1d; 2d) are friction welded. 6. The power cable (1; 2) as claimed in any of the preceding claims, wherein the power cable (1; 2) is a high voltage power cable. 10 15 20 256. The power cable (1; 2) as claimed in any of the preceding claims, wherein the power cable (1; 2) is a high voltage power cable. 10 15 20 25 7. The power cable (1 ; 2) as claimed in any of the preceding claims, wherein the power cable (1 ; 2) is a subsea cable.7. The power cable (1; 2) as claimed in any of the preceding claims, wherein the power cable (1; 2) is a subsea cable. 8. A method of manufacturing a power cable (1; 2), comprising: a) providing a joint member (1d; 2d) having a first end (1e; 2e) made of a first metal material and a second end (1f; 2f) made of a second metal material, the first end (1e; 2e) and the second end (1f; 2f) being joined thermally, b) providing a first conductive core part made of a first metal material, c) providing a second conductive core part made of a second metal material, d) joining the first conductive core part with the first end (1e; 2e) of the joint member (1d; 2d), e) joining the second conductive core part with the second end (1f; 2f) of the joint member (1d; 2d), thereby obtaining a conductive core (1a; 2a) having a first section (1b; 2b) defined by the first conductive core part and a second section (1c; 2c) defined by the second conductive core part, and f) providing a sheath to enclose the conductive core (1a; 2a).8. A method of manufacturing a power cable (1; 2), comprising: a) providing a joint member (1d; 2d) having a end rst end (1e; 2e) made of a fi rst metal material and a second end (1f; 2f) made of a second metal material, the end rst end (1e; 2e) and the second end (1f; 2f) being joined thermally, b) providing a conduct rst conductive core part made of a fi rst metal material, c) providing a second conductive core part made of a second metal material, d) joining the fi rst conductive core part with the fi rst end (1e; 2e) of the joint member (1d; 2d), e) joining the second conductive core part with the second end ( 1f; 2f) of the joint member (1d; 2d), thereby obtaining a conductive core (1a; 2a) having a first section (1b; 2b) defined by the fi rst conductive core part and a second section (1c; 2c) de fi ned by the second conductive core part, and f) providing a sheath to enclose the conductive core (1a; 2a). 9. The method as claimed in claim 8, wherein the first end (1e; 2e) and the second end (1f; 2f) of the joint member (1d; 2d) are joined thermally.9. The method as claimed in claim 8, where the fi rst end (1e; 2e) and the second end (1f; 2f) of the joint member (1d; 2d) are joined thermally. 10. The method as claimed in claim 9, wherein the first end (1e; 2e) and the second end (1f; 2f) of the joint member (1d; 2d) are joined by means of friction welding.10. The method as claimed in claim 9, wherein the fi rst end (1e; 2e) and the second end (1f; 2f) of the joint member (1d; 2d) are joined by means of friction welding. 11. The method as claimed in any of claims 8-10 wherein the first conductive core part is joined with the first end (1e; 2e) of the joint member (1d; 2d) by means of welding. 1011. The method as claimed in any of claims 8-10 wherein the fi rst conductive core part is joined with the fi rst end (1e; 2e) of the joint member (1d; 2d) by means of welding. 10 12. The method as claimed in any of claims 8-11, wherein the second conductive core part is joined with the second end (1f; 2f) of the joint member (1d; 2d) by means of welding.12. The method as claimed in any of claims 8-11, wherein the second conductive core part is joined with the second end (1f; 2f) of the joint member (1d; 2d) by means of welding. 13. The method as claimed in any of claims 8-12, wherein the first metal material is aluminium and the second metal material is copper.13. The method as claimed in any of claims 8-12, wherein the first metal material is aluminum and the second metal material is copper. 14. The method as claimed in any of claims 8-13, wherein the power cable (1 ; 2) is a high voltage power cable.14. The method as claimed in any of claims 8-13, wherein the power cable (1; 2) is a high voltage power cable. 15. The method as claimed in any of claims 8-14, wherein the power cable (1; 2) is a subsea cable.15. The method as claimed in any of claims 8-14, wherein the power cable (1; 2) is a subsea cable.
SE1400140A 2014-03-13 2014-03-13 Power cable and method of manufacturing the same SE1400140A1 (en)

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KR102625955B1 (en) * 2018-12-07 2024-01-16 엘에스전선 주식회사 Connecting Conductor For Connecting Different Conductor And Conneting Joint Of Power Cable
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US10410766B2 (en) 2014-11-25 2019-09-10 Nkt Hv Cables Gmbh Jointed power cable and method of manufacturing the same
AU2014412382B2 (en) * 2014-11-25 2020-12-03 Nkt Hv Cables Ab Jointed power cable and method of manufacturing the same
EP3139443A1 (en) * 2015-09-01 2017-03-08 Nexans Electrical high voltage cable
EP3916937A1 (en) 2020-05-29 2021-12-01 Nexans Conductor joint

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