IEC 60287-3-3 Ed. 1.0现行
Electric cables - Calculation of the current rating Part 3-3: Sections on operating conditions - Cables crossing external heat sources
出版：International Electrotechnical Committee
专家解读视频
Describes a method for calculating the continuous current rating factor for cables of all voltages where crossings of external heat sources are involved. The method is applicable to any type of cable. The method assumes that the entire region surrounding a cable, or cables, has uniform thermal characteristics and that the principle of superposition applies. The principle of superposition does not strictly apply to touching cables and hence the calculation method set out in this standard will produce an optimistic result if applied to touching cables
NEN IEC 60287-3-3:2007 - Identical
UNE 21144-3-3:2007 - Identical
BS IEC 60287-3-3:2007 - Identical
CEI 20-21/3-3 Ed. 3 (2007) - Identical
