1、 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 T
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8、stserviec.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
9、 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 p
10、ublisher.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
11、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 Installati
12、on 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 St
13、andalone 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 chec
14、ks.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 ac
15、cording 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
16、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
