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
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English - French, Spanish, Castilian
06-08-2017
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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 This document defines site reference conditions, however the general values are superseded by specific national requirements.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 21144-3-1:1997 | Identical |
| BS IEC 60287-3-1:2017 | Identical |
| UNE 21144-3-1:2018 | Identical |
| CEI 20-21/3-1 : 2007 | Identical |
| NEN 10287-3-1 : 1996 | Identical |
| UNE-EN 50341-1:2017 | Overhead electrical lines exceeding AC 1 kV - Part 1: General requirements - Common specifications |
| BS IEC 60287-2-1:2015 | Electric cables. Calculation of the current rating Thermal resistance. Calculation of thermal resistance |
| CEI EN 62271-204 : 2012 | HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 204: RIGID GAS-INSULATED TRANSMISSION LINES FOR RATED VOLTAGES ABOVE 52 KV |
| IEEE 525-2007 | IEEE Guide for the Design and Installation of Cable Systems in Substations |
| BS EN 50341-1:2012 | Overhead electrical lines exceeding AC 1 kV General requirements. Common specifications |
| I.S. EN 50522:2010 | EARTHING OF POWER INSTALLATIONS EXCEEDING 1 KV A.C. |
| BS EN 50522:2010 | Earthing of power installations exceeding 1 kV a.c. |
| HD 637 S1:1999/corrigendum:2005 | POWER INSTALLATIONS EXCEEDING 1 KV A.C. |
| HD 60364-5-52:2011/A11:2017 | LOW-VOLTAGE ELECTRICAL INSTALLATIONS - PART 5-52: SELECTION AND ERECTION OF ELECTRICAL EQUIPMENT - WIRING SYSTEMS |
| UNE-EN 62271-204:2012 | High-voltage switchgear and controlgear - Part 204: Rigid gas-insulated transmission lines for rated voltage above 52 kV |
| 09/30205410 DC : 0 | BS EN 62271-204 - HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 204: RIGID HIGH-VOLTAGE, GAS-INSULATED TRANSMISSION LINES FOR RATED VOLTAGES OF 72,5 KV AND ABOVE |
| I.S. HD 637:1999 | POWER INSTALLATIONS EXCEEDING 1 KV A.C. |
| EN 50341-1:2012 | Overhead electrical lines exceeding AC 1 kV - Part 1: General requirements - Common specifications |
| CEI EN 50522 : 2011 | EARTHING OF POWER INSTALLATIONS EXCEEDING 1 KV A.C. |
| 08/30191664 DC : DRAFT OCT 2008 | BS EN 50522 - EARTHING OF POWER INSTALLATIONS EXCEEDING 1 KV A.C. |
| IEC 60287-2-1:2015 RLV | Electric cables - Calculation of the current rating - Part 2-1: Thermal resistance - Calculation of thermal resistance |
| IEC 60364-5-52:2009 | Low-voltage electrical installations - Part 5-52: Selection and erection of electrical equipment - Wiring systems |
| NFC 32 902 : 1998 | INSULATED CABLES AND CORDS FOR INSTALLATIONS - POWER CABLE ACCESSORIES INTENDED FOR INDUSTRY, FOR RATED VOLTAGE 0,6/1(1,2) KV - TEST METHODS AND TEST REQUIREMENTS |
| I.S. EN 50341-1:2012 | OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS |
| CEI EN 50341-1 : 2013 | OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS |
| 12/30260570 DC : 0 | BS EN 50341-1 - OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS |
| IEEE 848-2015 | IEEE Standard Procedure for the Determination of the Ampacity Derating Factor for Fire-Protected Cable Systems |
| S.R. HD 60364-5-52:2011 | LOW-VOLTAGE ELECTRICAL INSTALLATIONS - PART 5-52: SELECTION AND ERECTION OF ELECTRICAL EQUIPMENT - WIRING SYSTEMS |
| IEC 60364-5-523:1999 | Electrical installations of buildings - Part 5: Selection and erection of electrical equipment - Section 523: Current-carrying capacities in wiring systems |
| IEC 60502-2:2014 RLV | Power cables with extruded insulation and their accessories for rated voltages from 1 kV (<em>U</em><sub>m</sub> = 1,2 kV) up to 30 kV (<em>U</em><sub>m</sub> = 36 kV) – Part 2: Cables for rated voltages from 6 kV (<em>U</em><sub>m</sub> = 7,2 kV) up to 30 kV (<em>U</em><sub>m</sub> = 36 kV) |
| UNE-EN 50522:2012 | Earthing of power installations exceeding 1 kV a.c. |
| IEC 62271-204:2011 | High-voltage switchgear and controlgear - Part 204: Rigid gas-insulated transmission lines for rated voltage above 52 kV |
| EN 62271-204:2011 | High-voltage switchgear and controlgear - Part 204: Rigid gas-insulated transmission lines for rated voltage above 52 kV |
| PREN 50341-1 : DRAFT 2012 | OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS |
| I.S. EN 62271-204:2011 | HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 204: RIGID GAS-INSULATED TRANSMISSION LINES FOR RATED VOLTAGE ABOVE 52 KV (IEC 62271-204:2011 (EQV)) |
| BS EN 62271-204:2011 | High-voltage switchgear and controlgear Rigid gas-insulated transmission lines for rated voltage above 52 kV |
| IEC 60183:2015 | Guidance for the selection of high-voltage A.C. cable systems |
| EN 50522:2010 | Earthing of power installations exceeding 1 kV a.c. |
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