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IEC 60287-1-1:2006

Electric cables - Calculation of the current rating - Part 1-1: Current rating equations (100 % load factor) and calculation of losses - General

Edition date: 2023-05-22
Cancelled
Available languages: Spanish, French, English
Summary: Applicable to the conditions of steady-state operation of cables at all alternating voltages, and direct voltages up to 5 kV, 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. Provides formulae for current ratings and losses. The formulae given are essentially literal and designedly leave open the selection of certain important parameters. These may be divided into three groups: - parameters related to construction of a cable (for example, thermal resistivity of insulating material) for which representative values have been selected based on published work; - parameters related to the surrounding conditions, which may vary widely, the selection of which depends on the country in which the cables are used or are to be used; - parameters which result from an agreement between manufacturer and user and which involve a margin for security of service (for example, maximum conductor temperature).

Concerne uniquement le fonctionnement en régime permanent des câbles de toutes tensions alternatives et de tensions continues jusqu'à 5 kV, enterrés directement dans le sol, placés dans des fourreaux, caniveaux ou tubes d'acier, avec ou sans assèchement partiel du sol, ainsi que les câbles posés à l'air libre. On entend par "régime permanent" la circulation continue d'un courant constant (facteur de charge 100 %) juste suffisant pour atteindre asymptotiquement la température maximale de l'âme en supposant que les conditions du milieu ambiant restent inchangées. Fournit des formules pour l'intensité du courant et les pertes. Les formules proposées sont essentiellement littérales et laissent en principe libre le choix de certains paramètres importants. Ceux-ci peuvent être divisés en trois groupes: - les paramètres liés à la constitution du câble (par exemple résistance thermique de l'isolant) pour lesquels des valeurs représentatives ont été recueillies, à partir des travaux publiés; - les paramètres liés aux conditions du milieu, qui peuvent varier considérablement; le choix de ceux-ci dépend du pays où les câbles sont ou doivent être utilisés; - les paramètres résultant d'un accord entre fabricant et utilisateur et qui supposent une marge de sécurité en service (par exemple température maximale du conducteur).
ICS: 29.060.20-Cables
CTN: TC 20 - 1214

Standards Cancellations

Anula a IEC 60287-1-1:1994

Anula a IEC 60287-1-1:1994/AMD1:1995

Anula a IEC 60287-1-1:1994/AMD2:2001

Es anulada por IEC 60287-1-1:2023

Modificaciones Normas

Es modificada por IEC 60287-1-1:2006/AMD1:2014

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