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IEC 60287-2-3 : 1ED 2017

M00030888

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IEC 60287-2-3 : 1ED 2017

ELECTRIC CABLES - CALCULATION OF THE CURRENT RATING - PART 2-3: THERMAL RESISTANCE - CABLES INSTALLED IN VENTILATED TUNNELS

International Electrotechnical Committee

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Table of Contents

FOREWORD<br>INTRODUCTION<br>1 Scope <br>2 Normative references <br>3 Terms, definitions and symbols<br>4 Description of method <br>5 Formulae for air properties <br>6 Temperature profile<br>Annex A (informative) - Calculation example <br>Annex B (informative) - Delta-star transformation<br>Annex C (informative) - Calculation of F[m] coefficient<br>Bibliography

Abstract

Specifies a method for calculating the continuous current rating factor for cables of all voltages installed in ventilated tunnels.

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Document Type Standard
Status Current
Publisher International Electrotechnical Committee
Committee TC 20