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Description of BS IEC 60287-2-1:2015 - TC 2020IEC 60287-2-1:2015 is available as /2 which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60287-2-1:2015 is solely 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, in 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 of IEC 60287 provides formulae for thermal resistance. This second edition of IEC 60287-2-1 cancels and replaces the first edition, published in 1994, Amendment 1:2001, Amendment 2:2006 and Corrigendum 1:2008. This edition includes the following significant technical changes with respect to the previous edition: a) inclusion of a reference to the use of finite element methods where analytical methods are not available for the calculation of external thermal resistance; b) explanation about SL and SA type cables; c) calculation method for T3 for unarmoured three-core cables with extruded insulation and individual copper tape screens on each core; d) change of condition for X in 5.4; e) inclusion of constants or installation conditions for water filled ducts in Table 4.
About BSIBSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses. |
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