EP2742514B1 - Electric cable - Google Patents
Electric cable Download PDFInfo
- Publication number
- EP2742514B1 EP2742514B1 EP12740048.9A EP12740048A EP2742514B1 EP 2742514 B1 EP2742514 B1 EP 2742514B1 EP 12740048 A EP12740048 A EP 12740048A EP 2742514 B1 EP2742514 B1 EP 2742514B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cable
- layer
- outer sheath
- electric cable
- conductor
- 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.)
- Active
Links
- 239000004020 conductor Substances 0.000 claims description 11
- 239000006260 foam Substances 0.000 claims description 4
- 238000001266 bandaging Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 238000001125 extrusion Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
Definitions
- the invention relates to an electric cable with a conductor, with at least one surrounding insulating layer and with an outer sheath.
- Electric cables in particular medium voltage cables with a higher voltage range, which can be at 1000 V, must continue to function in the event of a fire for a defined period of time, without the voltage collapsing or the current being cut off.
- Such cables are sometimes used where the security of the power supply to the safety of persons or the availability of necessary equipment must be ensured even in case of fire.
- These may be skyscrapers, hospitals, metro stations, metro services, tunnel power supplies, airports, etc., ie those infrastructures that have high numbers of people or large and expensive property and / or require the highest level of availability.
- EP-A-0 017 609 discloses a plastic-insulated electrical cable with a flame-retardant inner cable, which is provided with an intumescent in case of fire inner jacket.
- a filler having esterifiable hydroxyl groups and, moreover, it is provided with a catalyzed acid catalyst and a blowing agent.
- the electrical lines are disadvantageously associated with each individual insulation, which are surrounded by the inner shell, which in turn is enclosed by an outer sheath. Such a cable is thus not suitable for the required power with 1000 V of a medium voltage cable.
- the present invention has been based on the object to provide an electric cable, which ensures a longer period of operation than known cables in case of fire and yet it is compact and inexpensive to produce in its construction.
- the object is achieved by arranging at least one intumescent layer surrounding the conductor over the entire cable length, which is integrated in the cable in such a way that it can foam when the electric cable is heated and provides heat protection thereof.
- Fig. 1 a designed for a single-phase operation electric cable 10 is shown, which is sometimes suitable for medium voltage and high voltage cables, which are used for operating voltages in particular for 1000 V or more.
- the electric cable 10 has a conductor 12, which in the present case is formed by a strand consisting of a plurality of wires 12 '.
- a surrounding insulating layer 13 and an outer shell 16 is provided.
- an intumescent layer 15 extending over the entire cable length is arranged between the insulation layer 13 and the outer sheath 16, which intumesces when the electric cable is heated, thereby providing heat protection over an increased period of time.
- This intumescent layer 15 is composed essentially of a polymer carrier and expandable graphite. It can be applied to a surrounding the insulating layer 13 band-shaped layer 14 and an inner shell 14 'by bandaging or extrusion.
- This band-shaped layer 14 in turn is formed for example as a metal shield and it comes to an electrical protective function, which serves as a diffusion barrier against ingress of molecular water and heat dissipation, this to increase the life of the cable.
- the mechanical protection of the cable 10 forming outer shell 16 is made of such a material and a thickness that this example, in case of fire and a corresponding heating Cracks and / or melts, so that this intumescent layer can foam up to a multiple of the cable outside diameter.
- the outer shell 16 is also applied by extrusion or by bandaging and it consists, for example, essentially of a polyolefin copolymer.
- conductor 12 could be surrounded by one or more semiconductor layers, at least one intervening dielectric isolation layer, and / or other layers.
- a cable can be used, the three inventive, preferably as in Fig. 1 illustrated trained Einleitertiv includes. This can be equipped with an additional jacket, a reinforcement, etc.
Landscapes
- Insulated Conductors (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Installation Of Indoor Wiring (AREA)
Description
Die Erfindung betrifft ein Elektrokabel mit einem Leiter, mit mindestens eine diesen umgebende Isolationsschicht und mit einem Aussenmantel.The invention relates to an electric cable with a conductor, with at least one surrounding insulating layer and with an outer sheath.
Elektrokabel, insbesondere Mittelspannungskabel mit einem höheren Spannungsbereich, welcher bei 1000 V liegen kann, müssen auch im Brandfall während einer definierten Zeit ihre Funktion aufrechterhalten, ohne dass die Spannung zusammenbricht oder der Stromschluss unterbrochen wird. Solche Kabel werden mitunter dort eingesetzt, wo die Sicherstellung der Spannungsversorgung der Sicherheit von Personen oder der Verfügbarkeit von notwendigen Anlagen auch im Brandfall sichergestellt werden muss. Es kann sich um Hochhäuser, Spitäler, Metrostationen, U-Bahnversorgungen, Tunnelstromversorgungen, Flughäfen etc. handeln, d.h. um solche Infrastrukturen, die hohe Personendichte oder grosse und teure Sachanlagen aufweisen und/oder höchste Verfügbarkeit verlangen.Electric cables, in particular medium voltage cables with a higher voltage range, which can be at 1000 V, must continue to function in the event of a fire for a defined period of time, without the voltage collapsing or the current being cut off. Such cables are sometimes used where the security of the power supply to the safety of persons or the availability of necessary equipment must be ensured even in case of fire. These may be skyscrapers, hospitals, metro stations, metro services, tunnel power supplies, airports, etc., ie those infrastructures that have high numbers of people or large and expensive property and / or require the highest level of availability.
Bekannte Energiekabel weisen in der Regel mehrere Bandierungslagen auf dem Leiter auf, die im Brandfall den Isolationserhalt auch nach dem Wegbrennen des Isolationsmaterials sicherstellen. Hochspannungskabel mit Bandierungen auf dem Kupferleiter weisen ein von normalem Mittelspannungskabel unterschiedliches Alterungsverhalten auf, und alle bekannten Versionen sind in der Herstellung sehr aufwendig.Known power cables generally have several Bandierungslagen on the conductor, which ensure the isolation in the event of fire after the burning away of the insulation material. High voltage cables with banding on the copper conductor have a different aging behavior from normal medium voltage cables, and all known versions are very expensive to manufacture.
Die Druckschrift
Der vorliegenden Erfindung wurde die Aufgabe zugrundegelegt, ein Elektrokabel zu schaffen, welches im Brandfall eine längere Funktionstüchtigkeit als bekannte Kabel gewährleistet und dabei aber dennoch in seinem Aufbau kompakt und kostengünstig herstellbar ist.The present invention has been based on the object to provide an electric cable, which ensures a longer period of operation than known cables in case of fire and yet it is compact and inexpensive to produce in its construction.
Die Aufgabe ist erfindungsgemäss dadurch gelöst, dass mindestens eine den Leiter über die gesamte Kabellänge umgebende intumeszierende Schicht angeordnet ist, welche derart im Kabel integriert ist, dass sie bei Erhitzung des Elektrokabels aufschäumen kann und einen Hitzeschutz desselben bietet.According to the invention, the object is achieved by arranging at least one intumescent layer surrounding the conductor over the entire cable length, which is integrated in the cable in such a way that it can foam when the electric cable is heated and provides heat protection thereof.
Weitere bevorzugte Ausgestaltungen des erfindungsgemässen Einleiterkabels bilden den Gegenstand der abhängigen Ansprüche.Further preferred embodiments of the inventive single conductor cable form the subject of the dependent claims.
Ausführungsbeispiele sowie weitere Vorteile der Erfindung sind nachfolgend anhand der Zeichnung näher erläutert. Es zeigt:
- Fig. 1
- ein Ausführungsbeispiel eines erfindungsgemässen Einleiterkabels im Querschnitt.
- Fig. 1
- An embodiment of an inventive single conductor cable in cross section.
Gemäss
Das Elektrokabel 10 weist einen Leiter 12 auf, der vorliegend durch eine aus mehreren Drähten 12' bestehenden Litze gebildet ist. Zudem ist eine diesen umgebende Isolationsschicht 13 und ein Aussenmantel 16 vorgesehen.The
Erfindungsgemäss ist zwischen der Isolationsschicht 13 und dem Aussenmantel 16 eine sich über die gesamte Kabellänge erstreckende intumeszierende Schicht 15 angeordnet, welche bei Erhitzung des Elektrokabels aufschäumt und dadurch einen Hitzeschutz über eine erhöhte Zeitdauer desselben bietet.According to the invention, an
Diese intumeszierende Schicht 15 ist im Wesentlichen aus einem Polymerträger und Blähgraphit zusammengesetzt. Sie kann auf einer die Isolationsschicht 13 umgebenden bandförmigen Schicht 14 und einem Innenmantel 14' durch Bandagieren oder Extrudieren aufgebracht werden. Diese bandförmige Schicht 14 ihrerseits ist beispielsweise als Metallschirm ausgebildet und es kommt ihr eine elektrische Schutzfunktion zu, welche als Diffusionssperre gegen Eindringen von molekularem Wasser und als Wärmeableitung dient, dies zur Erhöhung der Lebensdauer des Kabels.This
Der einen mechanischen Schutz des Kabels 10 bildenden Aussenmantel 16 ist aus einem solchen Material und einer solchen Dicke hergestellt, dass dieser beispielsweise im Brandfall und einer entsprechenden Erhitzung reisst und/oder schmilzt, damit diese intumeszierende Schicht um ein Mehrfaches des Kabelaussendurchmessers aufschäumen kann. Der Aussenmantel 16 ist ebenfalls im Extrudierverfahren oder durch Bandagieren aufgebracht und er besteht zum Beispiel im Wesentlichen aus einem Polyolefin-Copolymer.The mechanical protection of the
Die Erfindung ist mit dem obigen Ausführungsbeispiel ausreichend dargetan. Sie könnte aber noch anders ausgestaltet sein. So könnte zum Beispiel der Leiter 12 von einer oder mehreren Halbleiterschichten, von wenigstens einer dazwischen liegenden Dielektrikum-Isolationsschicht und/oder von weiteren Schichten umgeben sein.The invention is sufficiently demonstrated with the above embodiment. But it could be designed differently. For example,
Für den dreiphasigen Betrieb mit Drehstrom kann ein Kabel verwendet werden, das drei erfindungsgemässe, vorzugsweise wie in
Claims (4)
- Electric cable comprising a conductor (12), at least one insulating layer (13) and an outer sheath (16), whereby at least one intumescent layer (15) surrounding the conductor (12) over the entire length of the cable is provided, which is integrated into the cable (10) such that it foams up if heated and provides a heat protection for this cable, characterised in that
at least one insulating layer (13) surrounding the conductor (12) consisting of a number of wires (12') is provided, whereby the at least one intumescent layer (15) is located between the insulating layer (13) and the outer sheath (16) and is composed of a polymer carrier and distending graphite, and the outer sheath (16) providing a mechanical protection for the cable (10) is produced from such a material and such a thickness that the latter ruptures and/or melts in the event of fire and heated correspondingly so that this intumescent layer (15) can foam up by a multiple of the outside diameter of the cable. - Electric cable according to Claim 1, characterised in that there is provided between the insulating layer (13) and the layer provided as a strip or extruded intumescent layer (15) a ribbon-like layer (14) and an inner sheath (14').
- Electric cable according to Claim 1 or 2, characterised in that the outer sheath (16) is applied by the extruding process or by bandaging.
- Electric cable according to any one of the preceding Claims 1 to 3, characterised in that the outer sheath (16) is composed of a polyolefin copolymer in two layers.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH01317/11A CH705184B1 (en) | 2011-08-09 | 2011-08-09 | Electrical cable. |
| PCT/EP2012/002972 WO2013020630A1 (en) | 2011-08-09 | 2012-07-16 | Electric cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2742514A1 EP2742514A1 (en) | 2014-06-18 |
| EP2742514B1 true EP2742514B1 (en) | 2016-08-31 |
Family
ID=46581886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12740048.9A Active EP2742514B1 (en) | 2011-08-09 | 2012-07-16 | Electric cable |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2742514B1 (en) |
| CH (1) | CH705184B1 (en) |
| MY (1) | MY175367A (en) |
| SG (1) | SG2014008205A (en) |
| WO (1) | WO2013020630A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2439395B1 (en) * | 2013-11-15 | 2014-11-14 | Relats, S. A. | Self-closing fire, thermal and electric protection cover |
| CN105324892A (en) * | 2013-06-19 | 2016-02-10 | 瑞拉特斯有限公司 | Self-closing thermal and electrical fire protection sheath |
| CN107731365A (en) * | 2017-09-29 | 2018-02-23 | 惠州市鼎丰泰科技有限公司 | A kind of novel conductive row |
| CN110660521B (en) * | 2019-09-30 | 2021-06-04 | 江苏亨通线缆科技有限公司 | High-performance fire-resistant flame-retardant railway signal cable and preparation method thereof |
| CN117936178B (en) * | 2024-03-18 | 2024-07-09 | 广州南洋电缆集团有限公司 | Fire-retardant fire-resistant cable for monitoring line for fire control |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012071732A1 (en) * | 2010-12-02 | 2012-06-07 | Dow Global Technologies Llc | Intumescent, halogen-free, silicon-phosphorus-nitrogen based polymeric flame retardant |
| WO2012174712A1 (en) * | 2011-06-21 | 2012-12-27 | Dow Global Technologies Llc | Halogen-free flame-retardant polymer composition comprising piperazine based intumescent flame retardant |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2915188C2 (en) * | 1979-04-10 | 1983-02-17 | Siemens AG, 1000 Berlin und 8000 München | Plastic-insulated electrical cable with a flame-retardant inner sheath |
| US5132054A (en) * | 1991-05-16 | 1992-07-21 | Specified Technologies Inc. | Composition of matter for a fire retardant intumescent material having two stages of expansion and a process for making thereof |
| DE10162532C1 (en) * | 2001-12-19 | 2003-10-09 | Hilti Ag | Expandable graphite intercalation compounds, process for their preparation and their use |
| US7015398B2 (en) * | 2003-03-10 | 2006-03-21 | Gavriel Vexler | Communications cable |
| CA2469534A1 (en) * | 2003-06-18 | 2004-12-18 | Hilti Aktiengesellschaft | The use of thermally expandable graphite intercalation compounds for producing fire-protection seals and method for their production |
| CN101563733B (en) * | 2006-12-19 | 2012-10-31 | 联合碳化化学及塑料技术有限责任公司 | Cable comprising a shear thickening composition |
-
2011
- 2011-08-09 CH CH01317/11A patent/CH705184B1/en unknown
-
2012
- 2012-07-16 SG SG2014008205A patent/SG2014008205A/en unknown
- 2012-07-16 EP EP12740048.9A patent/EP2742514B1/en active Active
- 2012-07-16 MY MYPI2014000336A patent/MY175367A/en unknown
- 2012-07-16 WO PCT/EP2012/002972 patent/WO2013020630A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012071732A1 (en) * | 2010-12-02 | 2012-06-07 | Dow Global Technologies Llc | Intumescent, halogen-free, silicon-phosphorus-nitrogen based polymeric flame retardant |
| WO2012174712A1 (en) * | 2011-06-21 | 2012-12-27 | Dow Global Technologies Llc | Halogen-free flame-retardant polymer composition comprising piperazine based intumescent flame retardant |
Also Published As
| Publication number | Publication date |
|---|---|
| CH705184B1 (en) | 2015-07-15 |
| SG2014008205A (en) | 2014-04-28 |
| CH705184A2 (en) | 2013-02-15 |
| MY175367A (en) | 2020-06-23 |
| EP2742514A1 (en) | 2014-06-18 |
| WO2013020630A1 (en) | 2013-02-14 |
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