IEC_TR_61328-2017.pdf

IEC TR 61328 Edition 3.0 2017-04 TECHNICAL REPORT Live working Guidelines for the installation of transmission and distribution line conductors and earth wires Stringing equipment and accessory items IEC TR 61328:2017-04(en)colourinside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office Tel.:+41 22 919 02 11 3,rue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.IEC Catalogue-webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical information on IEC International Standards,Technical Specifications,Technical Reports and other documents.Available for PC,Mac OS,Android Tablets and iPad.IEC publications search-www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and also once a month by email.Electropedia-www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions in English and French,with equivalent terms in 16 additional languages.Also known as the International Electrotechnical Vocabulary(IEV)online.IEC Glossary-std.iec.ch/glossary 65 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries have been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:csciec.ch.IEC TR 61328 Edition 3.0 2017-04 TECHNICAL REPORT Live working Guidelines for the installation of transmission and distribution line conductors and earth wires Stringing equipment and accessory items INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 13.260;29.240.20;29.260.99 ISBN 978-2-8322-4130-1 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinside 2 IEC TR 61328:2017 IEC 2017 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms and definitions.7 4 Understanding the hazard Basic theory.17 4.1 General.17 4.2 Electric field induction from nearby circuits.17 4.2.1 Overview.17 4.2.2 Induced voltage.18 4.2.3 Induced current.19 4.2.4 Electrostatic charging.20 4.3 Magnetic field induction from nearby circuits.20 4.3.1 Induced current.20 4.3.2 Induced voltage.21 4.4 Re-energization.22 4.5 Mechanical risk.22 5 Conductor stringing methods and equipment.23 5.1 General.23 5.2 Slack stringing method.23 5.3 Tension stringing method.25 5.4 Stringing equipment.34 5.4.1 General.34 5.4.2 Tensioners.34 5.4.3 Pullers.37 5.4.4 Reel winders.41 5.4.5 Reel stands.42 5.4.6 Pilot rope puller.43 5.4.7 Pilot rope,pulling rope.43 5.4.8 Woven wire grip.44 5.4.9 Stringing blocks.44 5.4.10 Stringing rollers.47 5.4.11 Stringing block earth.48 5.4.12 Running earth.49 5.4.13 Hold-down block.49 5.4.14 Conductor car.49 5.5 Communications.53 6 Special earthing requirements.53 6.1 General.53 6.2 Work site earthing systems.54 6.2.1 Overview.54 6.2.2 Use of earth rods.55 6.2.3 Equipment earths.56 6.2.4 Earths for conductor,earth wire,metallic and synthetic rope.56 6.2.5 Earths for earth mat,conductors or earth wires.56 6.2.6 Earths for mid-span joining of conductors or earth wires.56 IEC TR 61328:2017 IEC 2017 3 6.2.7 Earths for clipping in the conductors or earth wires.57 6.2.8 Earths for installation of jumper loops for the conductor.57 6.2.9 Stringing block earths.57 6.2.10 Earth mat.57 6.3 General procedures and use of earthing systems.62 6.3.1 Overview.62 6.3.2 General procedures.62 6.3.3 Installation of the pilot or pulling ro