BS IEC 60287-1-1:2006+A1:2014 - Electric cables. Calculation of the current rating. Current rating equations (100 % load factor) and calculation of losses. General

BS IEC 60287-1-1:2006+A1:2014

Electric cables. Calculation of the current rating. Current rating equations (100 % load factor) and calculation of losses. General

Status : Current   Published : January 2007

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HARDCOPY



This part of IEC 60287 is 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.

This part 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).




Standard NumberBS IEC 60287-1-1:2006+A1:2014
TitleElectric cables. Calculation of the current rating. Current rating equations (100 % load factor) and calculation of losses. General
StatusCurrent
Publication Date31 January 2007
Normative References(Required to achieve compliance to this standard)IEC 60027-3, IEC 60141, IEC 60889, IEC 60502-2, IEC 60502-1, IEC 60228, IEC 60028:1925
Informative References(Provided for Information)No other standards are informatively referenced
ReplacesBS 7769-1.1:1997, IEC 60287-1-1:1994
International RelationshipsIEC 60287-1-1:2006/AMD1:2014
Amended ByAmendment, November 2014
Draft Superseded By12/30272842 DC
DescriptorsSheathed cables, Mathematical calculations, Power losses, Graphic characters, Dissipation factor, Dielectric properties, Rated current, Equations, Circuits, Electric conductors, Power cables, Symbols, Insulated cables, Single-core cables, Electric cables, Formulae (mathematics)
ICS29.060.20
Title in FrenchCâbles électriques. Calcul du courant admissible. Equations de l'intensité du courant admissible (facteur de charge 100 %) et calcul des pertes. Généralités
Title in GermanBerechnung der Strombelastbarkeit von Kabeln. Strombelastbarkeits-Gleichungen (100 %-Lastfaktor) und Berechnung der Verluste. Allgemeines
CommitteeGEL/20/16
ISBN978 0 580 80900 2
PublisherBSI
FormatA4
DeliveryYes
Pages34
File Size1.407 MB
Price£214.00


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