IEC 60287-3-3:2007
Current
The latest, up-to-date edition.
Electric cables - Calculation of the current rating - Part 3-3: Sections on operating conditions - Cables crossing external heat sources
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
English - French, Spanish, Castilian
15-05-2007
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FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Symbols
4 Description of method
4.1 General description
4.2 Single source crossing
4.3 Several crossings
4.4 Rating of two crossing cables
Annex A (informative) Example calculation
Annex B (informative) Temperature rise calculation
at any point along the route
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
| Committee |
TC 20
|
| DevelopmentNote |
Stability Date: 2019. (09/2017)
|
| DocumentType |
Standard
|
| Pages |
33
|
| PublisherName |
International Electrotechnical Committee
|
| Status |
Current
|
| Standards | Relationship |
| CEI 20-21/3-3 : 2007 | Identical |
| BS IEC 60287-3-3:2007 | Identical |
| NEN IEC 60287-3-3 : 2007 | Identical |
| UNE 21144-3-3:2007 | Identical |
| GOST R IEC 60287-3-3 : 2011 | Identical |
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