IEC 60287-1-2:1993
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Electric cables - Calculation of the current rating - Part 1: Current rating equations (100 % load factor) and calculations of losses - Section 2: Sheath eddy current loss factors for two circuits in flat formation
Hardcopy , PDF
English - French, English, French, Spanish, Castilian
09-12-1993
12-05-2023
FOREWORD
1 Scope
2 Normative references
3 Symbols
4 Description of method
4.1 General
4.2 Outline of method
4.3 Criteria for use of formulae and co-efficients
5 Formulae for sheath loss factors for high-
resistance sheaths in a single circuit
6 Calculation of the coefficients H, N and J
6.1 Allocation of coefficients to each cable,
time sequence and phase identification
6.2 Calculation of coefficients H(1,2 and 3)
table 1
6.3 Calculation of coefficients N(1,2,3,4,5 and 6)
table 2
6.4 Calculation of coefficients J(1,2,3,4,5 and 6)
tables 3 to 11
6.5 Calculation of coefficients Gs and gs
7 Notes on transposition of cables
8 Worked examples of calculation of eddy current losses
8.1 Introduction
8.2 Example 1
8.3 Example 2
Tables
Provides a method for calculating theeddy current losses in the metallic sheaths of single-core cablesarranged as a three-phase, double-circuit in flat formation.
| Committee |
TC 20
|
| DevelopmentNote |
Also numbered as BS 7769-1.2(1994) (10/2005) Stability Date: 2018. (10/2012)
|
| DocumentType |
Standard
|
| Pages |
59
|
| PublisherName |
International Electrotechnical Committee
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| CEI 20-21/1-2 : 2007 | Identical |
| GOST R IEC 60287-1-2 : 2009 | Identical |
| NEN 10287-1-2 : 1994 | Identical |
| UNE 21144-1-2:1997 | Identical |
| IEEE 525-2007 | IEEE Guide for the Design and Installation of Cable Systems in Substations |
| BS IEC 60287-1-3:2002 | Electric cables. Calculation of the current rating Current rating equations (100 % load factor) and calculation of losses - Current sharing between parallel single-core cables and calculation of circulating current losses |
| 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 |
| IEC 60287-1-3:2002 | Electric cables - Calculation of the current rating - Part 1-3: Current rating equations (100 % load factor) and calculation of losses - Current sharing between parallel single-core cables and calculation of circulating current losses |
| IEEE 848-2015 | IEEE Standard Procedure for the Determination of the Ampacity Derating Factor for Fire-Protected Cable Systems |
| IEC 60287-1-1:2006+AMD1:2014 CSV | Electric cables - Calculation of the current rating - Part 1-1:Current rating equations (100 % load factor) and calculation of losses - General |
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