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IEC 60287-3-1-ed.2.0
Electric cables - Calculation of the current rating - Part 3-1: Operating conditions - Site reference conditions
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STANDARD published on 8.6.2017
The information about the standard:
Designation standards: IEC 60287-3-1-ed.2.0
Publication date standards: 8.6.2017
SKU: NS-685525
The number of pages: 49
Approximate weight : 147 g (0.32 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Annotation of standard text IEC 60287-3-1-ed.2.0 :
IEC 60287-3-1:2017 is applicable to the conditions of steady-state operation of cables at all voltages, buried directly in the ground, in ducts, troughs or in steel pipes, both with and without partial drying-out of the soil, as well as cables in air. The term "steady state" is intended to mean a continuous constant current (100 % load factor) just sufficient to produce asymptotically the maximum conductor temperature, the surrounding ambient conditions being assumed constant. This document defines site reference conditions, however the general values are superseded by specific national requirements. This edition includes the following significant technical changes with respect to the previous edition: - the updated list of national laying conditions is now covered in Annex A; - Clause 5 about the information required from the purchaser for the selection of the appropriate type of cable has been removed. IEC 60287-3-1:2017 sapplique aux conditions de fonctionnement en regime permanent des cables de toutes tensions enterres directement dans le sol, places dans des fourreaux, caniveaux ou tubes dacier, avec ou sans assechement partiel du sol, ainsi que les cables poses a lair libre. On entend par "regime permanent" la circulation continue dun courant constant (facteur de charge 100 %) assez suffisant pour produire asymptotiquement la temperature maximale a lame en supposant que les conditions du milieu ambiant restent constantes. Le present document definit les conditions du site de reference, cependant les valeurs generales sont remplacees par les exigences specifiques nationales. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: - la liste mise a jour des conditions de pose nationales est maintenant couverte par lAnnexe A; - lArticle 5 relatif aux informations exigees de lacheteur pour permettre la selection du type approprie de cable a ete supprime.
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