EP0802544A1 - Quad having attached insulated conductors - Google Patents
Quad having attached insulated conductors Download PDFInfo
- Publication number
- EP0802544A1 EP0802544A1 EP97400850A EP97400850A EP0802544A1 EP 0802544 A1 EP0802544 A1 EP 0802544A1 EP 97400850 A EP97400850 A EP 97400850A EP 97400850 A EP97400850 A EP 97400850A EP 0802544 A1 EP0802544 A1 EP 0802544A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conductors
- insulated conductors
- quad
- cavity
- quarter
- 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- Withdrawn
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/005—Quad constructions
Definitions
- the present invention relates to a fourth.
- star quads used in telecommunication power lines.
- the star quads consist of two pairs of insulated conductors arranged at the top of a square, the two conductors of the same pair being arranged along a diagonal of the square.
- the conductors must be twisted and the pitch must be all the shorter as the requested speed is high.
- local networks are asked to transmit rates of 150 Mbits / s or even more by signals at frequencies of 100 MHz or more.
- star quads comprising insulated conductors arranged in a cylindrical tube of extruded synthetic material.
- the conductors In order for the conductors to be properly held, in particular during the handling of wiring during which several fourths are brought together to form a cable, it is necessary that the tube is fairly rigid and thick enough. Quarters of known structure are therefore difficult to handle.
- Document DE-A-25 16 830 also discloses a quarter star in which non-insulated conductors are arranged in cells of a central rod and held in place in these cells by extruding around the conductors a dielectric material in which the conductors are embedded.
- a quarter star in which non-insulated conductors are arranged in cells of a central rod and held in place in these cells by extruding around the conductors a dielectric material in which the conductors are embedded.
- Document US-A-3,610,814 also discloses a fourth star comprising insulated conductors placed side by side so as to define a central cavity. A sticky thermoplastic filling material is placed in the central cavity and around the insulated conductors. Although ensuring a good hold in position, a quarter of this type is very rigid.
- double pair quads are known in which four insulated conductors are twisted in pairs generally arranged in a double tube to produce a fourth.
- a quarter comprising four insulated conductors, characterized in that the insulated conductors are joined to each other to form an assembly comprising a curvilinear external contour covered by a mass of dielectric material and an empty central cavity or filled with '' a sealing material that does not reduce the flexibility of the fourth.
- the mass of dielectric material ensures that the insulated conductors are maintained in a precise position and the fourth keeps flexibility due to the absence of dielectric material in the cavity. central delimited by conductors or very low resistance to bending of the sealing material introduced therein.
- the fourth star comprises, in a manner known per se, four conductors 1 isolated by a solid or cellular dielectric material 2 such as polyethylene, polypropylene, polyvinyl chloride or a fluorinated polymer.
- a solid or cellular dielectric material 2 such as polyethylene, polypropylene, polyvinyl chloride or a fluorinated polymer.
- the insulated conductors are placed side by side to form an assembly having a curvilinear external contour which is covered by a mass of dielectric material 3, the central cavity 4 between the contiguous conductors not being filled with dielectric material.
- the fourth according to the invention is for example produced by first forming all of the insulated conductors joined together.
- This assembly is obtained by making a twist of four insulated conductors, which can easily be obtained on a traditional wiring machine.
- the assembly thus obtained is then passed through an extrusion head while maintaining the assembly according to the desired twisting pitch.
- the insulated conductors then remain suitably contiguous to each other and the extruded dielectric material covers the curvilinear external contour of the assembly without penetrating into the cavity 4.
Abstract
Description
La présente invention concerne une quarte.The present invention relates to a fourth.
On connaît des quartes étoile utilisées dans les lignes électriques de télécommunication. Les quartes étoile sont constituées de deux paires de conducteurs isolés disposés au sommet d'un carré, les deux conducteurs d'une même paire étant disposés selon une diagonale du carré.There are known star quads used in telecommunication power lines. The star quads consist of two pairs of insulated conductors arranged at the top of a square, the two conductors of the same pair being arranged along a diagonal of the square.
On sait que le positionnement relatif des conducteurs formant une quarte étoile est essentiel pour obtenir des couplages capacitifs et inductifs déterminés dont dépend la qualité de la transmission des informations. Ces couplages doivent être réalisés de façon d'autant plus précise que l'on souhaite faire passer un grand débit d'informations. Tout défaut de symétrie de la quarte se traduit par des couplages parasites entraînant des erreurs de transmission qui ne peuvent être corrigées qu'au dépend du débit des informations transmises.It is known that the relative positioning of the conductors forming a fourth star is essential for obtaining determined capacitive and inductive couplings on which the quality of the information transmission depends. These couplings must be carried out all the more precisely if it is desired to pass a large flow of information. Any lack of symmetry in the fourth results in parasitic couplings causing transmission errors which can only be corrected depending on the speed of the information transmitted.
Par ailleurs pour assurer une transmission satisfaisante les conducteurs doivent être torsadés et le pas doit être d'autant plus court que le débit demandé est élevé.Furthermore, to ensure satisfactory transmission, the conductors must be twisted and the pitch must be all the shorter as the requested speed is high.
A titre d'exemple on demande dans les réseaux locaux de transmettre des débits de 150 Mbits/s ou même plus par des signaux à des fréquences de 100 MHz ou plus.For example, local networks are asked to transmit rates of 150 Mbits / s or even more by signals at frequencies of 100 MHz or more.
On connaît, notamment du document FR-A-2.144.573 des quartes étoile comportant des conducteurs isolés disposés dans un tube cylindrique en matière synthétique extrudée. Afin que les conducteurs soient convenablement maintenus, en particulier lors des manipulations de câblage au cours desquelles plusieurs quartes sont réunies pour former un câble, il est nécessaire que le tube soit assez rigide et assez épais. Les quartes de structure connue sont donc d'une manipulation mal aisée.Are known, in particular from document FR-A-2,144,573, star quads comprising insulated conductors arranged in a cylindrical tube of extruded synthetic material. In order for the conductors to be properly held, in particular during the handling of wiring during which several fourths are brought together to form a cable, it is necessary that the tube is fairly rigid and thick enough. Quarters of known structure are therefore difficult to handle.
On connaît également du document DE-A-25 16 830 une quarte étoile dans laquelle des conducteurs non isolés sont disposés dans des alvéoles d'un jonc central et maintenues en place dans ces alvéoles en extrudant autour des conducteurs un matériau diélectrique dans lequel les conducteur sont noyés. De même que dans le cas précédent, il est nécessaire pour maintenir les conducteurs selon une disposition précise, de prévoir une couche importante de matière diélectrique de sorte que la quarte obtenue est d'une manipulation malaisée lors d'une opération de câblage associant plusieurs quartes. En outre, il est difficile de maintenir les conducteurs dans une position précise dans le fond des alvéoles pendant l'opération d'extrusion de la matière diélectrique.Document DE-A-25 16 830 also discloses a quarter star in which non-insulated conductors are arranged in cells of a central rod and held in place in these cells by extruding around the conductors a dielectric material in which the conductors are embedded. As in the previous case, it is necessary to maintain the conductors according to a precise arrangement, to provide a large layer of dielectric material so that the quarter obtained is difficult to handle during a wiring operation associating several quarters . In addition, it is difficult to maintain the conductors in a precise position in the bottom of the cells during the operation of extruding the dielectric material.
On connaît aussi du document US-A-3.610.814 une quarte étoile comportant des conducteurs isolés et accolés de façon à définir une cavité centrale. Un matériau de remplissage thermoplastique collant est disposé dans la cavité centrale et autour des conducteurs isolés. Bien qu'assurant un bon maintien en position, une quarte de ce type est très rigide.Document US-A-3,610,814 also discloses a fourth star comprising insulated conductors placed side by side so as to define a central cavity. A sticky thermoplastic filling material is placed in the central cavity and around the insulated conductors. Although ensuring a good hold in position, a quarter of this type is very rigid.
Par ailleurs on connaît des quartes double paires dans lesquelles quatre conducteurs isolés sont torsadés par paires généralement disposées dans un tube double pour réaliser une quarte.Furthermore, double pair quads are known in which four insulated conductors are twisted in pairs generally arranged in a double tube to produce a fourth.
Selon l'invention on prévoit une quarte comportant quatre conducteurs isolés, caractérisée en ce que les conducteurs isolés sont accolés les uns aux autres pour former un ensemble comportant un contour externe curviligne recouvert par une masse de matière diélectrique et une cavité centrale vide ou remplie d'un matériau d'étanchéité ne réduisant pas la flexibilité de la quarte.According to the invention there is provided a quarter comprising four insulated conductors, characterized in that the insulated conductors are joined to each other to form an assembly comprising a curvilinear external contour covered by a mass of dielectric material and an empty central cavity or filled with '' a sealing material that does not reduce the flexibility of the fourth.
Ainsi, en épousant le contour externe curviligne de l'ensemble des conducteurs isolés accolés, la masse de matière diélectrique assure un maintien des conducteurs isolés selon une position précise et la quarte garde une flexibilité en raison de l'absence de matière diélectrique dans la cavité centrale délimitée par les conducteurs accolés ou de la très faible résistance à la flexion de la matière d'étanchéité qui y est introduite.Thus, by marrying the curvilinear external contour of all of the insulated conductors placed side by side, the mass of dielectric material ensures that the insulated conductors are maintained in a precise position and the fourth keeps flexibility due to the absence of dielectric material in the cavity. central delimited by conductors or very low resistance to bending of the sealing material introduced therein.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui va suivre d'un mode de réalisation particulier non limitatif de l'invention, en référence à la figure unique ci-jointe qui est une vue en coupe très agrandie d'une quarte étoile selon l'invention.Other characteristics and advantages of the invention will appear on reading the following description of a particular, non-limiting embodiment of the invention, with reference to the attached single figure which is a very sectional view. enlarged by a fourth star according to the invention.
En référence à la figure, la quarte étoile selon l'invention comporte d'une façon connue en soi quatre conducteurs 1 isolés par un matériau diélectrique 2 plein ou cellulaire tel que du polyéthylène, du polypropylène, du polychlorure de vinyle ou un polymère fluoré. Lors de la réalisation de la quarte étoile, les quatre conducteurs isolés sont torsadés tout en étant guidés pour les maintenir de façon précise au sommet d'un carré.Referring to the figure, the fourth star according to the invention comprises, in a manner known per se, four
Selon l'invention les conducteurs isolés sont accolés les uns aux autres pour former un ensemble ayant un contour externe curviligne qui est recouvert par une masse de matière diélectrique 3, la cavité centrale 4 entre les conducteurs accolés n'étant pas remplie de matière diélectrique.According to the invention the insulated conductors are placed side by side to form an assembly having a curvilinear external contour which is covered by a mass of
La quarte selon l'invention est par exemple réalisée en formant tout d'abord l'ensemble des conducteurs isolés accolés. Cet ensemble est obtenu en réalisant une torsade de quatre conducteurs isolés, ce qui peut aisément être obtenu sur une machine de câblage traditionnel. L'ensemble ainsi obtenu est ensuite passé dans une tête d'extrusion en maintenant l'ensemble selon le pas de torsade souhaité. Les conducteurs isolés restent alors convenablement accolés les uns aux autres et la matière diélectrique extrudée recouvre le contour externe curviligne de l'ensemble sans pénétrer dans la cavité 4. Si l'on souhaite réaliser une quarte étanche on peut également prévoir d'introduire dans la cavité 4 une matière d'étanchéité telle qu'une graisse qui assure un remplissage de la cavité 4 sans diminuer la flexibilité de la quarte obtenue.The fourth according to the invention is for example produced by first forming all of the insulated conductors joined together. This assembly is obtained by making a twist of four insulated conductors, which can easily be obtained on a traditional wiring machine. The assembly thus obtained is then passed through an extrusion head while maintaining the assembly according to the desired twisting pitch. The insulated conductors then remain suitably contiguous to each other and the extruded dielectric material covers the curvilinear external contour of the assembly without penetrating into the
Bien entendu l'invention n'est pas limitée au mode de réalisation décrit et on peut y apporter des variantes de réalisation sans sortir du cadre de l'invention tel que défini par les revendications.Of course, the invention is not limited to the embodiment described and it is possible to make variant embodiments without departing from the scope of the invention as defined by the claims.
En particulier, on peut prévoir un ruban métallique posé en long ou en hélice autour de la quarte pour améliorer la diaphonie avec des quartes adjacentes et assurer une protection contre le rayonnement du câble ou contre les perturbations extérieures.In particular, it is possible to provide a metallic strip laid lengthwise or helically around the quarter to improve the crosstalk with adjacent quads and to protect against radiation from the cable or against external disturbances.
Bien que l'invention ait été plus particulièrement décrite en relation avec une quarte étoile, elle s'applique également à une quarte double paire.Although the invention has been more particularly described in relation to a quarter star, it also applies to a double pair quarter.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9604924A FR2747829B1 (en) | 1996-04-19 | 1996-04-19 | QUARTER COMPRISING ADDED ISOLATED CONDUCTORS |
FR9604924 | 1996-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0802544A1 true EP0802544A1 (en) | 1997-10-22 |
Family
ID=9491373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97400850A Withdrawn EP0802544A1 (en) | 1996-04-19 | 1997-04-15 | Quad having attached insulated conductors |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0802544A1 (en) |
FR (1) | FR2747829B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2940499A1 (en) * | 2008-12-22 | 2010-06-25 | Nexans | ASSEMBLY OF TORSADED INSULATED ELECTRICAL CONDUCTOR WIRES |
ITMC20120088A1 (en) * | 2012-11-21 | 2014-05-22 | Simone Marini | TRANSMISSION MEANS FOR BALANCED ANALOGUE / DIGITAL ELECTRICAL SIGNALS, FOR THE SUPPORT OF IP AND POE PROTOCOLS AND EQUIPPED WITH PECULIAR MECHANICAL CHARACTERISTICS |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB389118A (en) * | 1931-09-10 | 1933-03-10 | John Richard Pheazey | Improvements in or relating to electric signalling cables |
CH504082A (en) * | 1969-02-24 | 1971-02-28 | Huber+Suhner Ag | Core group of several cable cores with electrical conductors, process for their production and device for carrying out the process |
US3610814A (en) * | 1969-12-08 | 1971-10-05 | Bell Telephone Labor Inc | Spiral-four quad structure |
-
1996
- 1996-04-19 FR FR9604924A patent/FR2747829B1/en not_active Expired - Fee Related
-
1997
- 1997-04-15 EP EP97400850A patent/EP0802544A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB389118A (en) * | 1931-09-10 | 1933-03-10 | John Richard Pheazey | Improvements in or relating to electric signalling cables |
CH504082A (en) * | 1969-02-24 | 1971-02-28 | Huber+Suhner Ag | Core group of several cable cores with electrical conductors, process for their production and device for carrying out the process |
US3610814A (en) * | 1969-12-08 | 1971-10-05 | Bell Telephone Labor Inc | Spiral-four quad structure |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2940499A1 (en) * | 2008-12-22 | 2010-06-25 | Nexans | ASSEMBLY OF TORSADED INSULATED ELECTRICAL CONDUCTOR WIRES |
WO2010072934A1 (en) * | 2008-12-22 | 2010-07-01 | Nexans | Assembly of twisted insulated electric wires |
RU2490741C2 (en) * | 2008-12-22 | 2013-08-20 | Нексан | Assembly of twisted insulated electrical conductors |
CN102257577B (en) * | 2008-12-22 | 2013-12-25 | 尼克桑斯公司 | Assembly of twisted insulated electric wires |
ITMC20120088A1 (en) * | 2012-11-21 | 2014-05-22 | Simone Marini | TRANSMISSION MEANS FOR BALANCED ANALOGUE / DIGITAL ELECTRICAL SIGNALS, FOR THE SUPPORT OF IP AND POE PROTOCOLS AND EQUIPPED WITH PECULIAR MECHANICAL CHARACTERISTICS |
Also Published As
Publication number | Publication date |
---|---|
FR2747829B1 (en) | 1998-05-22 |
FR2747829A1 (en) | 1997-10-24 |
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