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BS IEC 60287-1-3:2023

BS IEC 60287-1-3:2023

$142.49

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

Published By Publication Date Number of Pages
BSI 2023 24
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PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
5 FOREWORD
7 INTRODUCTION
8 1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
9 4 Description of method
4.1 General
10 4.2 Outline of method
12 Table 1 ā€“ Values of Ī± for conductors
13 4.3 Matrix solution
14 Annex A (informative) Example calculations
A.1 Overview
A.2 Example 1
A.2.1 General
15 A.2.2 Calculations
Table A.1 ā€“ Sheath loss factor calculation according to IEC 60287-1-1
17 Table A.2 ā€“ Sheath current and sheath loss factor calculation per phase
18 Table A.3 ā€“ Calculated values of di,k
Table A.4 ā€“ Calculated values of zz
19 Table A.5 ā€“ Array [Z] including coefficients for currents
20 A.3 Example 2
A.4 Example 3
Table A.6 ā€“ Sheath current and sheath loss factor calculation per phase
21 A.5 Example 4
Table A.7 ā€“ Sheath current and sheath loss factor calculation per phase
Table A.8 ā€“ Sheath current and sheath loss factor calculation per phase
22 Annex B (informative) Example of the computation of the coefficient Ī± for hollow core conductors
Figure B.1 ā€“ Representation of a hollow core conductor
23 Bibliography

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BS IEC 60287-1-3:2023
$142.49