IEC 60287-3-1:2017
Current
The latest, up-to-date edition.
Electric cables - Calculation of the current rating - Part 3-1: Operating conditions - Site reference conditions
Hardcopy , PDF
English - French
08-06-2017
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Reference ambient temperatures and thermal
resistivities of soil in various countries
Annex A (informative) - Values relating to the operating
conditions in various countries
Bibliography
IEC 60287-3-1:2017 is applicable to the conditions of steady-state operation of cables at all voltages, 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 This document defines site reference conditions, however the general values are superseded by specific national requirements. This edition includes the following significant technical changes with respect to the previous edition:
- the updated list of national laying conditions is now covered in Annex A;
- Clause 5 about the information required from the purchaser for the selection of the appropriate type of cable has been removed.
| Committee |
TC 20
|
| DevelopmentNote |
Supersedes IEC 60287 (03/2001) Stability Date: 2021. (06/2017)
|
| DocumentType |
Standard
|
| Pages |
49
|
| PublisherName |
International Electrotechnical Committee
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| NEN IEC 60287-3-1 : 2017 | Identical |
| CEI IEC 60287-3-1 : 2018 | Identical |
| UNE 21144-3-1:2018 | Identical |
| BS IEC 60287-3-1:2017 | Identical |
| CEI 20-21/3-1 : 2007 | Identical |
| NEN 10287-3-1 : 1996 | Identical |
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