1、 IEC 60826 Edition 4.0 2017-02 INTERNATIONAL STANDARD Overhead transmission lines Design criteria IEC 60826:2017-02(en)colourinsideCopyright International Electrotechnical Commission Provided by IHS under license with IECNot for Resale,02/16/2017 21:43:08 MSTNo reproduction or networking permitted w
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11、license with IECNot for Resale,02/16/2017 21:43:08 MSTNo reproduction or networking permitted without license from IHS-,-,-IEC 60826 Edition 4.0 2017-02 INTERNATIONAL STANDARD Overhead transmission lines Design criteria INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.240.20 ISBN 978-2-8322-3884-4 R
12、egistered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideCopyright International Electrotechnical Commission Provided by IHS under license with IECNot for Resale,02/16/2017 21:43:08 MSTNo repr
13、oduction or networking permitted without license from IHS-,-,-2 IEC 60826:2017 IEC 2017 CONTENTS FOREWORD.7 1 Scope.9 2 Normative references.9 3 Terms,definitions,symbols and abbreviations.9 3.1 Terms and definitions.9 3.2 Symbols and abbreviations.12 4 General.15 4.1 Objective.15 4.2 System design.
14、15 4.3 System reliability.16 5 General design criteria.16 5.1 Methodology.16 5.1.1 General.16 5.1.2 Reliability requirements.17 5.1.3 Security requirements.19 5.1.4 Safety requirements.19 5.2 Load-strength requirements.19 5.2.1 Climatic loads.19 5.2.2 Design requirements for the system.20 5.2.3 Desi
15、gn formula for each component.21 6 Loadings.22 6.1 Description.22 6.2 Climatic loads,wind and associated temperatures.22 6.2.1 General.22 6.2.2 Field of application.22 6.2.3 Terrain roughness.23 6.2.4 Reference wind speed VR.23 6.2.5 Assessment of meteorological measurements.24 6.2.6 Determination f
16、rom gradient wind velocities.25 6.2.7 Combination of wind speed and temperatures.25 6.2.8 Number of supports subjected in wind action,effect of length of line.26 6.2.9 Unit action of the wind speed on any line component or element.26 6.2.10 Evaluation of wind loads on line components and elements.27 6.3 Climatic loads,ice without wind.34 6.3.1 Description.34 6.3.2 Ice data.34 6.3.3 Evaluation of yearly maximum ice load by means of meteorological data analysis.35 6.3.4 Reference limit ice load.36
