1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-20431-0 ARP 062-9-4:2008Edition 1IEC/TS 62257-9-4:2006Edition 1STANDARDS SOUTH AFRICA Recommended practice Recommendations for small renew
4、able energy and hybrid systems for rural electrification Part 9-4: Integrated system User installation This recommended practice is the identical implementation of IEC/TS 62257-9-4:2006 and is adopted with the permission of the International Electrotechnical Commission. WARNING Can only be used in c
5、onjunction with the ARP 062 series. This document does not have the status of a South African National Standard. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards S
6、outh Africa ARP 062-9-4:2008 Edition 1 IEC/TS 62257-9-4:2006 Edition 1 Table of changes Change No. Date Scope National foreword This recommended practice is a technical agreement developed in accordance with SANS 1-1, and agreed to by StanSA TC 69, Power electronics and alternative energy conversion
7、. This document was published in March 2008. TECHNICAL SPECIFICATION IECTS 62257-9-4First edition2006-10Recommendations 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
8、 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, SwitzerlandTeleph
9、one: +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 SANS 062-9-4:2008This s tandard may only be used and printed by approved subscription and freemai
10、ling clients of the SABS . 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 interface7 5 Protection against electric shock 8 5.1 Requirements for d
11、.c. parts of installation8 5.2 Requirements for a.c. parts of installation8 6 Protection against overcurrent9 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 equipment10 8.1 Wiring system1
12、0 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 interface17 9 Verification .17 9.1 Pre-commissioning checks 17 10 Operation and maintenance18 Annex A (informative) Maximum possible length of circuits
13、 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. syst
14、em 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 cur
15、rent 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
16、rating and selection for overcurrent protection17 SANS 062-9-4:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .TS 62257-9-4 IEC:2006(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ RECOMMENDATIONS FOR SMALL RENEWABLE ENERGY AND HYBRID SY
17、STEMS FOR RURAL ELECTRIFICATION Part 9-4: Integrated system User installation FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
18、 international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (he
19、reafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also pa
20、rticipate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible,
21、 an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While a
22、ll reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to a
23、pply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate
24、 its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including ind
25、ividual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon
26、, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements o
27、f this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. The main task of IEC technical committees is to prepare International Standards. In exceptional circumstances, a technical committee may propose the publicatio
28、n of a technical specification when the required support cannot be obtained for the publication of an International Standard, despite repeated efforts, or The subject is still under technical development or where, for any other reason, there is the future but no immediate possibility of an agreement
29、 on an International Standard. Technical specifications are subject to review within three years of publication to decide whether they can be transformed into International Standards. IEC 62257-9-4, which is a technical specification, has been prepared by IEC technical committee 82: Solar photovolta
30、ic energy systems. This part of IEC 62257-9 is based on IEC/PAS 62111 (1999); it cancels and replaces the relevant parts of IEC/PAS 62111. SANS 062-9-4:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 4 TS 62257-9-4 IEC:2006(E) This part
31、of IEC 62257-9 is to be used in conjunction with the IEC 62257 series. The text of this technical specification is based on the following documents: Enquiry draft Report on voting 82/414/DTS 82/441/RVC Full information on the voting for the approval of this technical specification can be found in th
32、e report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 62257 series, under the general title Recommendations for small renewable energy and hybrid systems for rural electrification, can be f
33、ound on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be transfor
34、med into an international standard; reconfirmed; withdrawn; replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. SANS 062-9-4:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .TS
35、62257-9-4 IEC:2006(E) 5 INTRODUCTION The IEC 62257 series intends to provide to different players involved in rural electrification projects (such as project implementers, project contractors, project supervisors, installers, etc.) documents for the setting up of renewable energy and hybrid systems
36、with a.c. nominal voltage below 500 V, d.c. nominal voltage below 750 V and nominal power below 100 kVA. These documents are recommendations: to choose the right system for the right place, to design the system, to operate and maintain the system. These documents are focused only on rural electrific
37、ation concentrating on but not specific to developing countries. They should not be considered as all inclusive to rural electrification. The documents try to promote the use of Renewable energies in rural electrification; they do not deal with clean mechanisms developments at this time (CO2emission
38、, carbon credit, etc.). Further developments in this field could be introduced in future steps. This consistent set of documents is best considered as a whole with different parts corresponding to items for safety, sustainability of systems and at the lowest life cycle cost as possible. One of the m
39、ain objectives is to provide the minimum sufficient requirements, relevant to the field of application that is: small renewable energy and hybrid off-grid systems. SANS 062-9-4:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 6 TS 62257-9
40、-4 IEC:2006(E) RECOMMENDATIONS FOR SMALL RENEWABLE ENERGY AND HYBRID SYSTEMS FOR RURAL ELECTRIFICATION Part 9-4: Integrated system User installation 1 Scope The purpose of this part of IEC 62257 is to specify the general requirements for the design and the implementation of a users installation. Thi
41、s part of IEC 62257-9 applies to single phase users electrical installations with maximum power of 500 VA, in Decentralized Rural Electrification Systems (DRES). NOTE For installations above 500 VA in decentralized electrification systems, IEC 62257-5 applies. This part of IEC 62257-9 is applicable
42、to installations supplied by a microgrid (120 V a.c. or 230 V a.c.) and to installations encompassing their own single-unit micropowerplant (120 V a.c. or 230 V a.c. or 12 V d.c. or 24 V d.c.) The part of IEC 62257-9 applies neither to the electric power production and distribution installations des
43、cribed in the sections concerning microplants and microgrids, nor to user electrical equipment. It details the rules governing the design and construction of consumers electrical installations for the purpose of ensuring the safety of persons and property, and satisfactory operation in accordance wi
44、th the purpose for which the installations are designed. It applies to new installations and modifications of existing installations. 2 Normative reference The following referenced documents are essential for the application of this document. For dated references, only the edition cited applies. For
45、 undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60269 (all parts), Low-voltage fuses IEC 60364-5-52, Electrical installations of buildings Part 5-52: Selection and erection of electrical equipment Wiring systems IEC 62257 (all parts), Recomm
46、endations for small renewable energy and hybrid systems for rural electrification 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 protective conductor (identification: PE) conductor provided for purposes of safety, for example protection agai
47、nst electric shock NOTE In an electrical installation, the conductor identified PE is normally also considered as protective earthing conductor. IEV 195-02-09 SANS 062-9-4:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .TS 62257-9-4 IEC:2
48、006(E) 7 3.2 PEN conductor conductor combining the functions of a protective earthing conductor and a neutral conductor IEV 195-02-12 3.3 equipotential bonding provision of electric connections between conductive parts, intended to achieve equipotentiality NOTE The role of the equipotential bonding
49、is to decrease the difference in potential that can exists between two exposed-conductive parts of an installation. 3.4 surge arrester device designed to protect the electrical apparatus from high transient overvoltages and to limit the duration and frequently, the amplitude of the follow-on current 3.5 supply point contractual limit between the grid and the users installation NOTE In rural electrification systems, it is generally
