EP2713374A1 - Multiconductor cable with high performance against fire - Google Patents
Multiconductor cable with high performance against fire Download PDFInfo
- Publication number
- EP2713374A1 EP2713374A1 EP20130175372 EP13175372A EP2713374A1 EP 2713374 A1 EP2713374 A1 EP 2713374A1 EP 20130175372 EP20130175372 EP 20130175372 EP 13175372 A EP13175372 A EP 13175372A EP 2713374 A1 EP2713374 A1 EP 2713374A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conductors
- cable
- electrical cable
- outer sheath
- cable according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- 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 a multicore cable with high fire performance. More specifically, such a cable is dimensioned in particular to slow the spread of fire.
- Fire-resistant cables exist and have already been patented.
- the cables according to the invention are configured to be effective vis-à-vis a fire, slowing down the propagation of flames, while maintaining good flexibility in all directions, to facilitate their implementation in an installation. They are easier to handle and transport because of their lightness, and are inexpensive because of a reduction in the amount of material involved in their outer shell.
- the invention relates to an electrical cable comprising at least three non-aligned conductors and a common outer sheath surrounding said three conductors.
- the main characteristic of a cable according to the invention is that each conductor is in contact with at least two other conductors, and that the outer sheath closely follows the shape of the conductors by having bumps and grooves, said sheath representing the layer the outermost of said cable.
- the conductors are not arranged with each other in a flat arrangement, for which all the conductors would be aligned in the same plane. On the contrary, they are arranged in a compact manner so that the cross-section of the cable is substantially circular.
- Such a cable may in particular have a conductor in the central position.
- the outer outer sheath is dimensioned to the fair, and therefore tightly enclose the drivers by marrying their shape.
- This sheath therefore has a reduced thickness around and between the conductors, compared to that which would have a bulky sheath, in which the conductors would be embedded.
- a cable according to the invention has good flexibility in all directions of space, unlike a flat conductor arrangement. It can therefore be implanted in a facility with great flexibility of handling.
- the electric cables according to the invention are configured to slow the spread of a fire. Such a thickness therefore gives said cables a high security character.
- a thin outer sheath tends to lighten the cable, and is therefore an undeniable asset for the transport and handling phases.
- the conductors are conventional, and may for example be made of copper.
- the outer profile of the sheath is rugged to account for the presence of drivers. It should be noted that the outer outer sheath is the outermost layer of the cable, and that the bumps and grooves are visible from outside the cable.
- the bumps and grooves are parallel and extend in a longitudinal direction of said cable, each bump corresponding to a conductor. It is important to emphasize that the grooves correspond to retracted parts of the sheath, and which are located further back than would be a sheath tensioned between said conductors. These grooves are thus hollow parts of the sheath.
- the cable has a cross section formed alternately by rounded protuberances corresponding to the bumps, and by recessed areas embodying the grooves.
- the cross section of the cable to a star-shaped profile whose parts protruding correspond to the drivers.
- the recessed areas are hollow areas corresponding to the interstices between the drivers. In other words, not only the outer sheath closely matches the shape of the conductors but also the areas between said conductors.
- the recessed areas of the sheath have a rounded profile.
- the curvature of these recessed zones is opposite to that corresponding to the outline of the conductors, so that the circumference of the cable is sinusoidal.
- Such a cable has a softened outer surface, without striking breakage and is therefore unlikely to rupture or accidental cutting.
- the recessed areas have an angled profile materialized by a ridge bottom.
- Such a cable has an outer surface with a rugged terrain, including these angle returns marking the interstices between the conductors.
- Such a configuration favors a small amount of material for the outer sheath.
- the common outer sheath has a constant thickness around the conductors.
- each conductor is surrounded by an individual insulating layer.
- the common outer sheath encloses the individual insulating layers of each cable, being in contact with them.
- the common outer sheath comprises a flame retardant filler.
- a flame retardant filler increases the non-propagation properties of the fire of a cable according to the invention.
- the flame retardant filler comprises a metal hydroxide.
- the cable comprises at most seven straight conductors.
- This particular embodiment excludes configurations for which the conductors are twisted or wound in any way whatsoever, around each other.
- the cables according to the invention have the advantage of possessing proven properties of non-propagation of the flame or fire, while maintaining flexibility in all directions, allowing them to be easily wrapped around a support coil, or to be handled with ease when they are installed in an installation. They also have the advantage of being light and can be transported in large quantities, without particular difficulty. Finally, they have the advantage of being inexpensive because of the small thickness of the outer casing, requiring only a small amount of material.
- a first preferred embodiment of a cable 1 comprises three copper conductors 2, each surrounded by an individual insulating layer 3.
- This insulating layer 3 is preferably made of polymer, and the three conductors 2 are placed in the cable 1, so that each individual layer 3 is in contact with the other individual layers 3.
- the three conductors 2 are regularly distributed around a circle, making an angle of 120 ° between them.
- These conductors 2 are rectilinear and parallel to each other, and are placed in a common outer sheath 4 constituting the outermost layer of the cable 1.
- This common outer sheath 4 comprises a flame-retardant filler preferably made from a metal hydroxide, such as for example aluminum trihydroxide or magnesium dihydroxide.
- This sheath 4 encloses the three conductors 2 bearing against their insulating layer 3, said sheath 4 closely matching the shape of said individual layers 3.
- the outer sheath of the cable 1 has three rounded protuberances 5 protruding radially from the cable 1, and located at 120 ° from each other, each of said protuberances 5 corresponding to a conductor 2 which emerges laterally from the cable 1.
- the outer outer sheath 4 of the cable 1 is alternately constituted by a plurality of bumps 5 and grooves 6 arranged in parallel and extending along a longitudinal axis of the cable 1.
- the central portion 7 of the cable 1, which is delimited by the three conductors 2, provides a free space between said conductors 2.
- a second preferred embodiment of a cable 10 according to the invention differs from the first mode described above in that the recessed areas 16 are not rounded, but terminate in an edge 17, marking a clear break of the relief of said sheath 14 at the interstices separating the conductors 2.
- these recessed areas 16 are much more marked and allow the outer outer sheath to have a substantially constant thickness all around the cable 10, both at each conductor 2 at the level of each gap between two conductors 2. All other structural, dimensional and geometric characteristics are retained between the two embodiments described above.
- This second embodiment favors an outer sheath as light as possible, having a uniform thickness all around the circumference of the cable.
Landscapes
- Insulated Conductors (AREA)
Abstract
Description
L'invention se rapporte à un câble multiconducteur à haute performance contre le feu. Plus spécifiquement, un tel câble est dimensionné pour notamment ralentir la propagation du feu.The invention relates to a multicore cable with high fire performance. More specifically, such a cable is dimensioned in particular to slow the spread of fire.
Les câbles conçus pour résister au feu existent et ont déjà fait l'objet de brevet. On peut, par exemple, citer la demande de brevet
Les câbles selon l'invention, sont configurés pour être performants vis-à-vis d'un incendie, en ralentissant notamment la propagation des flammes, tout en conservant une bonne flexibilité dans toutes les directions, afin de faciliter leur implantation dans une installation. Ils sont de plus faciles à manipuler et à transporter en raison de leur légèreté, et sont d'un coût avantageux en raison d'une réduction de la quantité de matière impliquée au niveau de leur enveloppe externe.The cables according to the invention are configured to be effective vis-à-vis a fire, slowing down the propagation of flames, while maintaining good flexibility in all directions, to facilitate their implementation in an installation. They are easier to handle and transport because of their lightness, and are inexpensive because of a reduction in the amount of material involved in their outer shell.
L'invention a pour objet un câble électrique comprenant au moins trois conducteurs non alignés et une gaine extérieure commune entourant lesdits trois conducteurs.The invention relates to an electrical cable comprising at least three non-aligned conductors and a common outer sheath surrounding said three conductors.
La principale caractéristique d'un câble selon l'invention, est que chaque conducteur est en contact avec au moins deux autres conducteurs, et que la gaine extérieure épouse étroitement la forme des conducteurs en présentant des bosses et des gorges, ladite gaine représentant la couche la plus externe dudit câble. Autrement dit, les conducteurs ne sont pas agencés les uns avec les autres selon un arrangement à plat, pour lequel tous les conducteurs seraient alignés dans le même plan. Au contraire, ils sont agencés de façon compacte de façon à ce que la section transversale du câble soit sensiblement circulaire. Un tel câble peut notamment posséder un conducteur en position centrale. La gaine extérieure commune est dimensionnée au plus juste, et vient donc enserrer étroitement les conducteurs en épousant leur forme. Cette gaine possède donc une épaisseur réduite autour et entre les conducteurs, par rapport à celle qu'aurait une gaine volumineuse, dans laquelle seraient noyés les conducteurs. De par cette configuration particulière de gaine et d'agencement de conducteurs, un câble selon l'invention possède une bonne flexibilité dans toutes les directions de l'espace, contrairement à un arrangement de conducteurs à plat. Il peut donc être implanté dans une installation avec une grande souplesse de manipulation. De plus, puisqu'une gaine extérieure d'épaisseur réduite et épousant étroitement la forme des conducteurs entraine une plus faible quantité de matière combustible sur le câble, les câbles électriques selon l'invention, sont configurés pour ralentir la propagation d'un incendie. Une telle épaisseur confère donc auxdits câbles, un caractère sécuritaire élevé. Enfin, une gaine extérieure peu épaisse a tendance à alléger le câble, et constitue par conséquent, un atout indéniable pour les phases de transport et de manipulation. Les conducteurs sont conventionnels, et peuvent par exemple être constitués de cuivre. Le profil extérieur de la gaine est accidenté pour tenir compte de la présence des conducteurs. Il est à souligner que la gaine extérieure commune est la couche la plus externe du câble, et que les bosses et les gorges sont visibles de l'extérieur du câble.The main characteristic of a cable according to the invention is that each conductor is in contact with at least two other conductors, and that the outer sheath closely follows the shape of the conductors by having bumps and grooves, said sheath representing the layer the outermost of said cable. In other words, the conductors are not arranged with each other in a flat arrangement, for which all the conductors would be aligned in the same plane. On the contrary, they are arranged in a compact manner so that the cross-section of the cable is substantially circular. Such a cable may in particular have a conductor in the central position. The outer outer sheath is dimensioned to the fair, and therefore tightly enclose the drivers by marrying their shape. This sheath therefore has a reduced thickness around and between the conductors, compared to that which would have a bulky sheath, in which the conductors would be embedded. By this particular configuration of sheath and conductor arrangement, a cable according to the invention has good flexibility in all directions of space, unlike a flat conductor arrangement. It can therefore be implanted in a facility with great flexibility of handling. In addition, since an outer sheath of reduced thickness and closely matching the shape of the conductors causes a smaller amount of combustible material on the cable, the electric cables according to the invention are configured to slow the spread of a fire. Such a thickness therefore gives said cables a high security character. Finally, a thin outer sheath tends to lighten the cable, and is therefore an undeniable asset for the transport and handling phases. The conductors are conventional, and may for example be made of copper. The outer profile of the sheath is rugged to account for the presence of drivers. It should be noted that the outer outer sheath is the outermost layer of the cable, and that the bumps and grooves are visible from outside the cable.
Avantageusement, les bosses et les gorges sont parallèles et s'étendent selon une direction longitudinale dudit câble, chaque bosse correspondant à un conducteur. Il est important de souligner que les gorges correspondent à des parties rentrées de la gaine, et qui sont situées plus en retrait que ne le serait un gaine tendue entre lesdits conducteurs. Ces gorges constituent donc des parties creusées de la gaine.Advantageously, the bumps and grooves are parallel and extend in a longitudinal direction of said cable, each bump corresponding to a conductor. It is important to emphasize that the grooves correspond to retracted parts of the sheath, and which are located further back than would be a sheath tensioned between said conductors. These grooves are thus hollow parts of the sheath.
De façon préférentielle, le câble présente une section transversale constituée en alternance par des protubérances arrondies correspondant aux bosses, et par des zones en retrait matérialisant les gorges. De façon schématique, la section transversale du câble à un profil étoilé dont les parties saillantes correspondent aux conducteurs. Les zones en retrait sont des zones creuses correspondant aux interstices entre les conducteurs. Autrement dit, non seulement la gaine extérieure épouse étroitement la forme des conducteurs mais également les zones situées entre lesdits conducteurs.Preferably, the cable has a cross section formed alternately by rounded protuberances corresponding to the bumps, and by recessed areas embodying the grooves. Schematically, the cross section of the cable to a star-shaped profile whose parts protruding correspond to the drivers. The recessed areas are hollow areas corresponding to the interstices between the drivers. In other words, not only the outer sheath closely matches the shape of the conductors but also the areas between said conductors.
Selon un premier mode de réalisation préféré d'un câble selon l'invention, les zones en retrait de la gaine ont un profil arrondi. L'incurvation de ces zones en retrait est inverse de celle correspondant au contour des conducteurs, si bien que la circonférence du câble est sinusoïdale. Un tel câble présente une surface externe adoucie, sans cassure marquante et est donc peu sujet à une rupture ou à un découpage accidentel.According to a first preferred embodiment of a cable according to the invention, the recessed areas of the sheath have a rounded profile. The curvature of these recessed zones is opposite to that corresponding to the outline of the conductors, so that the circumference of the cable is sinusoidal. Such a cable has a softened outer surface, without striking breakage and is therefore unlikely to rupture or accidental cutting.
Selon un deuxième mode de réalisation préféré d'un câble selon l'invention, les zones en retrait ont un profil en angle matérialisé par un fond en arête. Un tel câble présente une surface extérieure avec un relief accidenté, avec notamment ces renvois d'angle marquant les interstices entre les conducteurs. Une telle configuration privilégie une faible quantité de matière pour la gaine extérieure.According to a second preferred embodiment of a cable according to the invention, the recessed areas have an angled profile materialized by a ridge bottom. Such a cable has an outer surface with a rugged terrain, including these angle returns marking the interstices between the conductors. Such a configuration favors a small amount of material for the outer sheath.
Préférentiellement, la gaine extérieure commune possède une épaisseur constante autour des conducteurs.Preferably, the common outer sheath has a constant thickness around the conductors.
De façon avantageuse, chaque conducteur est entouré par une couche isolante individuelle. Pour cette configuration, la gaine extérieure commune vient enserrer les couches isolantes individuelles de chaque câble, en étant à leur contact.Advantageously, each conductor is surrounded by an individual insulating layer. For this configuration, the common outer sheath encloses the individual insulating layers of each cable, being in contact with them.
Avantageusement, la gaine extérieure commune comprend une charge ignifugeante. Une telle composition accroit les propriétés de non propagation de l'incendie d'un câble selon l'invention.Advantageously, the common outer sheath comprises a flame retardant filler. Such a composition increases the non-propagation properties of the fire of a cable according to the invention.
De façon préférentielle, la charge ignifugeante comprend un hydroxyde métallique.Preferably, the flame retardant filler comprises a metal hydroxide.
Préférentiellement, le câble comprend au plus sept conducteurs rectilignes. Ce mode de réalisation particulier exclut les configurations pour lesquelles les conducteurs sont torsadés ou enroulés d'une quelconque façon que ce soit, les uns autour des autres.Preferably, the cable comprises at most seven straight conductors. This particular embodiment excludes configurations for which the conductors are twisted or wound in any way whatsoever, around each other.
Les câbles selon l'invention présentent l'avantage de posséder des propriétés éprouvées de non propagation de la flamme ou de l'incendie , tout en conservant des aptitudes à la flexibilité dans toutes les directions, leur permettant d'être facilement enroulés autour d'une bobine support, ou d'être manipulés avec aisance lors de leur implantation dans une installation. Ils ont de plus l'avantage d'être légers et peuvent donc être transportés en grande quantité, sans difficulté particulière. Ils présentent enfin l'avantage, d'être peut coûteux en raison de la faible épaisseur de l'enveloppe extérieure, ne nécessitant qu'une faible quantité de matériau.The cables according to the invention have the advantage of possessing proven properties of non-propagation of the flame or fire, while maintaining flexibility in all directions, allowing them to be easily wrapped around a support coil, or to be handled with ease when they are installed in an installation. They also have the advantage of being light and can be transported in large quantities, without particular difficulty. Finally, they have the advantage of being inexpensive because of the small thickness of the outer casing, requiring only a small amount of material.
On donne, ci-après, une description détaillée de deux modes de réalisation préférés d'un câble selon l'invention, en se référant aux
- La
figure 1A est une vue en coupe transversale d'un premier mode de réalisation préféré d'un câble selon l'invention, - La
figure 1B est une vue en perspective d'une portion du câble de lafigure 1A , - La
figure 2A est une vue en coupe transversale d'un deuxième mode de réalisation préféré d'un câble selon l'invention, - La
figure 2B est une vue en perspective d'une portion du câble de lafigure 2A ,
- The
Figure 1A is a cross-sectional view of a first preferred embodiment of a cable according to the invention, - The
Figure 1B is a perspective view of a portion of the cable from theFigure 1A , - The
Figure 2A is a cross-sectional view of a second preferred embodiment of a cable according to the invention, - The
Figure 2B is a perspective view of a portion of the cable from theFigure 2A ,
En se référant aux
En se référant aux
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1259212A FR2996349B1 (en) | 2012-09-28 | 2012-09-28 | MULTICONDUCTIVE CABLE WITH HIGH PERFORMANCE AGAINST FIRE |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2713374A1 true EP2713374A1 (en) | 2014-04-02 |
Family
ID=47356130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20130175372 Withdrawn EP2713374A1 (en) | 2012-09-28 | 2013-07-05 | Multiconductor cable with high performance against fire |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2713374A1 (en) |
FR (1) | FR2996349B1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2654867A1 (en) * | 1989-11-23 | 1991-05-24 | Fressynet Eric | Electrical cable capable of providing a minimum electrical service during a fire, even when directly exposed to a flame |
US20080073105A1 (en) * | 2006-09-21 | 2008-03-27 | Clark William T | Telecommunications cable |
US20090133897A1 (en) * | 2005-07-29 | 2009-05-28 | Thierry Jorand | Substantially flat fire-resistant safety cable |
-
2012
- 2012-09-28 FR FR1259212A patent/FR2996349B1/en not_active Expired - Fee Related
-
2013
- 2013-07-05 EP EP20130175372 patent/EP2713374A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2654867A1 (en) * | 1989-11-23 | 1991-05-24 | Fressynet Eric | Electrical cable capable of providing a minimum electrical service during a fire, even when directly exposed to a flame |
US20090133897A1 (en) * | 2005-07-29 | 2009-05-28 | Thierry Jorand | Substantially flat fire-resistant safety cable |
US20080073105A1 (en) * | 2006-09-21 | 2008-03-27 | Clark William T | Telecommunications cable |
Also Published As
Publication number | Publication date |
---|---|
FR2996349A1 (en) | 2014-04-04 |
FR2996349B1 (en) | 2014-09-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2047345C (en) | Telecommunications underwater optical fiber cable | |
CA2047346C (en) | Telecommunications underwater optical fiber cable | |
CA2088215C (en) | High frequency electric cable | |
EP0330525B1 (en) | Prefabricated electric conduit, adaptable to several rated currents, of the type comprising a flat, channelled insulator support for conductor rails | |
FR2669143A1 (en) | ELECTRICAL CABLE WITH HIGH SPEED OF PROPAGATION. | |
FR2485859A1 (en) | ELECTRIC HEATING FLEXIBLE CABLE WITH TEMPERATURE SELF-LIMITATION | |
FR2511178A1 (en) | CABLE FOR OIL WELL | |
FR2522438A1 (en) | ELECTRIC CABLE FOR USE IN OIL WELLS | |
EP2105994A1 (en) | Joint structure for connecting two superconducting cables | |
EP1816656B1 (en) | Electric cable protected against corrosion | |
FR2465303A1 (en) | SHIELDING FOR ELECTRICAL CONDUCTOR | |
FR2529007A1 (en) | ELECTRICAL CABLE SUPPORTING VERY SEVERE CONDITIONS OF USE | |
EP2665069B1 (en) | High voltage electrical transmission cable | |
EP0506521B1 (en) | Laminated heating window | |
EP2713374A1 (en) | Multiconductor cable with high performance against fire | |
EP3270385A1 (en) | Electrical transmission cable with composite cores | |
FR2521732A1 (en) | OPTICAL FIBER CABLES AND METHOD FOR MANUFACTURING SAME | |
FR2468189A1 (en) | ELECTRIC CABLE PROTECTED AGAINST MOISTURE | |
EP1163682B1 (en) | Radiating cable | |
EP3109943B1 (en) | Electric connection device for an electrical appliance | |
FR3018003B1 (en) | IMPEDANCE ADAPTATION SYSTEM AND CONTACT SYSTEM WITH SUCH AN IMPEDANCE ADAPTATION SYSTEM | |
EP3266278B1 (en) | Heating cable with directed heat flow | |
EP0707322A1 (en) | Power cable | |
FR2709592A1 (en) | Cable resistant to chemical attack | |
FR2644660A1 (en) | Heating cable, more especially intended for direct heating by radiation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
17P | Request for examination filed |
Effective date: 20141002 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
17Q | First examination report despatched |
Effective date: 20150318 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20151210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20160421 |