IEC 60794-4-20-ed.2.0

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Designation: IEC 60794-4-20-ed.2.0

Publication date: 28/08/2018

Pages: 53

Country: International technical standard

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IEC 60794-4-20:2018 covers optical telecommunication cables, commonly with single-mode fibres used primarily in overhead power lines applications. The cables can also be used in other overhead utility networks, such as for telephony or TV services. Requirements of the sectional specification IEC 60794-4 for aerial optical cables along electrical power lines are applicable to cables covered by this document. This document covers the construction, mechanical, electrical, and optical performance, installation guidelines, acceptance criteria, test requirements, environmental considerations, and accessories compatibility for an all dielectric, self-supporting fibre optic (ADSS) cable. This document provides construction and performance requirements that ensure, within the guidelines of this document, that the required mechanical integrity of the cable components as well as optical fibre mechanical reliability and transmission parameters are maintained. The ADSS cable consists of single mode optical fibres contained in one or more protective dielectric fibre optic units surrounded by or attached to suitable dielectric strength members and sheaths. The cable does not contain metallic components. An ADSS cable is designed to meet the optical and mechanical requirements under different installation, operating and environmental conditions and loadings, as described in Annex B. This document excludes any "lashed" or "wrapped" OPAC cables included in IEC 60794-4. Figure 8 aerial cables are also excluded; they are specified in IEC 60794-3-20. This second edition cancels and replaces the first edition published in 2012 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - this document has been streamlined by cross-referencing IEC 60794-1-1, - IEC 60794-4 (all parts) and IEC 60794-1-2; - reference to the MICE table has been deleted; - the example of test method for particular environment in Annex C has been deleted; - creep test method has been updated in Annex E. Keywords: optical telecommunication cables, single-mode fibres used primarily in overhead power lines .LIEC 60794-4-20:2018 couvre les cables optiques de telecommunication generalement equipes de fibres unimodales, utilises principalement dans des applications le long des lignes aeriennes a haute tension. Les cables peuvent egalement etre utilises dans dautres reseaux de services aeriens, tels que des services de telephonie ou de television. Les exigences de la specification intermediaire IEC 60794-4 pour des cables optiques aeriens le long de lignes electriques de puissance sont applicables aux cables couverts par le present document. Le present document couvre la construction, les performances mecaniques, electriques et optiques, les lignes directrices relatives a linstallation, les criteres dacceptation, les exigences relatives aux essais, les considerations sur lenvironnement et la compatibilite des accessoires pour cable fibronique autoporteur entierement dielectrique (ADSS: all dielectric self-supporting). Le present document fournit des exigences de performances et de construction qui garantissent, par les lignes directrices du present document, que sont maintenus lintegrite mecanique exigee des composants du cable ainsi que les parametres de transmission et la fiabilite mecanique des fibres optiques. Le cable ADSS est constitue de fibres optiques unimodales contenues dans une ou plusieurs unites fibroniques dielectriques de protection entourees de, ou fixees a des gaines et des elements de rigidite dielectrique appropriee. Le cable ne contient pas de composants metalliques. Un cable ADSS est concu pour satisfaire aux exigences mecaniques et optiques dans differentes conditions d’installations, de fonctionnement et denvironnement et pour differentes charges, comme cela est decrit a lAnnexe B.AnchorAnchorAnchorAnchor Le present document exclut les cables OPAC "laces" ou "enroules" inclus dans lIEC 60794-4. Les cables aeriens figure-8 sont egalement exclus; ils sont specifies dans lIEC 60794-3-20. Cette deuxieme edition annule et remplace la premiere edition parue en 2012 dont elle constitue une revision technique. La presente edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: - le present document a ete simplifie par etablissement de correspondances avec les normes IEC 60794-1-1, IEC 60794-4 (toutes les parties) et IEC 60794-1-2; - la reference au tableau MICE a ete supprimee; - lexemple de methode dessai pour un environnement particulier a lAnnexe C a ete supprime; - la methode dessai de fluage a ete mise a jour a lAnnexe E. Mots-cles: cables optiques de telecommunication, lignes aeriennes a haute tension