BS IEC 60287-3-1:2017
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Electric cables. Calculation of the current rating – Operating conditions. Site reference conditions
| Published By | Publication Date | Number of Pages |
| BSI | 2017 | 28 |
This part of IEC 60287-3 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This document defines site reference conditions, however the general values are superseded by specific national requirements.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 4 | English CONTENTS |
| 5 | FOREWORD |
| 7 | INTRODUCTION |
| 8 | 1 Scope 2 Normative references 3 Terms and definitions 4 Reference ambient temperatures and thermal resistivities of soil in various countries 4.1 Operating conditions – Site reference conditions |
| 9 | 4.2 Procedure when values are not provided in national tables 4.2.1 General 4.2.2 Ambient temperatures at sea level 4.2.3 Thermal resistivity of soil 4.2.4 Solar radiation Tables Table 1 – Ambient temperatures at sea level Table 2 – Thermal resistivity of soil |
| 10 | Annex A (informative) Values relating to the operating conditions in various countries A.1 Australia A.2 Austria |
| 11 | A.3 Canada |
| 12 | A.4 China A.5 Egypt |
| 13 | A.6 Finland |
| 14 | A.7 France |
| 15 | A.8 Germany |
| 16 | A.9 Italy A.10 Japan A.11 Mexico |
| 19 | A.12 Netherlands |
| 20 | A.13 New Zealand A.14 Norway |
| 21 | A.15 Oman A.16 Poland |
| 22 | A.17 Portugal A.18 Spain |
| 23 | A.19 South Africa A.20 Sweden |
| 24 | A.21 Switzerland A.22 United Kingdom A.22.1 HV |
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