IEC_TS_62257-9-4-2006.pdf

TECHNICAL SPECIFICATION IECTS 62257-9-4 First edition2006-10 Recommendations for small renewable energy and hybrid systems for rural electrification Part 9-4:Integrated system User installation Reference number IEC/TS 62257-9-4:2006(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editions The IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,the base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2.Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating to this publication,including its validity,is available in the IEC Catalogue of publications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication,as well as the list of publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publications The on-line catalogue on the IEC web site(www.iec.ch/searchpub)enables you to search by a variety of criteria including text searches,technical committees and date of publication.On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda.IEC Just Published This summary of recently issued publications(www.iec.ch/online_news/justpub)is also available by email.Please contact the Customer Service Centre(see below)for further information.Customer Service Centre If you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.ch Tel:+41 22 919 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TECHNICAL SPECIFICATION IECTS 62257-9-4 First edition2006-10 Recommendations for small renewable energy and hybrid systems for rural electrification Part 9-4:Integrated system User installation PRICE CODE IEC 2006 Copyright-all rights reserved 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 the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.ch S For price,see current catalogueCommission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TS 62257-9-4 IEC:2006(E)CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative reference.6 3 Terms and definitions.6 4 General considerations.7 4.1 General.7 4.2 Installation limits.7 4.3 User interface.7 5 Protection against electric shock.8 5.1 Requirements for d.c.parts of installation.8 5.2 Requirements for a.c.parts of installation.8 6 Protection against overcurrent.9 7 Protection against effect of lightning.10 7.1 Installation supplied from a microgrid.10 7.2 Standalone installation.10 8 Selection and erection of electrical equipment.10 8.1 Wiring system.10 8.2 Isolation and switching.16 8.3 Surge protective devices.17 8.4 Earthing arrangement,protective conductors and protective bonding.17 8.5 User interface.17 9 Verification.17 9.1 Pre-commissioning checks.17 10 Operation and maintenance.18 Annex A(informative)Maximum possible length of circuits with different cables and conductors to handle maximum voltage drops(ambient temperature 30C).19 Figure 1 Installation limits.7 Figure 2 Protection of persons in an installation supplied from a microgrid according to a TN-C-S system.8 Figure 3 Protection of persons in a combined d.c.and a.c.system.9 Figure A.1 Maximum possible length of circuit as a function of current for a voltage drop of 3%in a.c.system in a cable HO5VVF.20 Figure A.2 Maximum possible length of circuit as a function of current for a voltage drop of 15%in d.c.system in a cable 1000RO2V.21 Table 1 maximum design current of circuits depending on voltages.9 Table 2 Maximum acceptable voltage drop values in installations.11 Table 3 Cross-sectional area for copper conductors in fixed installations.11 Table 4 Selection of wiring systems.12 Table 5 Installation of wiring systems.13 Table 6 Fuses/circuit breakers rating and selection for overcurrent protection.17 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS