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 978-0-626-23431-7 SANS 62110:2009Edition 1IEC 62110:2009Edition 1SOUTH AFRICAN NATIONAL STANDARD Electric and magnetic field levels generated by AC
4、power systems Measurement procedures with regard to public exposure This national standard is the identical implementation of IEC 62110:2009 and is adopted with the permission of the International Electrotechnical Commission. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private
5、Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 62110:2009 Edition 1 IEC 62110:2009 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS TC 73, Electromagnetic compatibility, in
6、 accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in December 2009. IEC 62110Edition 1.0 2009-08INTERNATIONAL STANDARD NORME INTERNATIONALEElectric and magnetic field levels generated by AC power systems
7、Measurement procedures with regard to public exposure Champs lectriques et magntiques gnrs par les systmes dalimentation courant alternatif Procdures de mesure des niveaux dexposition du public INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XAICS 17.220.20; 29.2
8、40 PRICE CODECODE PRIXISBN 2-8318-1059-3 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale colourinsideSANS 62110:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the
9、SABS . 2 62110 IEC:2009 CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope.8 2 Normative reference .8 3 Terms and definitions .8 4 Measurement principle for electric and magnetic fields.9 4.1 General .9 4.2 Instruments .9 4.3 Harmonic content 10 4.4 Record of measurement result.10 4.5 Measurement considerat
10、ions.11 4.5.1 Field orientation.11 4.5.2 Measurement locations12 4.5.3 Perturbing effects of an operator in electric field measurement12 4.5.4 Effects from other sources in magnetic field measurement 12 4.5.5 Humidity condition in electric field measurement .12 5 Fundamental measurement procedures f
11、or electric and magnetic fields12 5.1 General procedure 12 5.2 Single-point measurement.13 5.3 Three-point measurement13 5.4 Five-point measurement 14 6 Measurement procedures for finding the maximum exposure level to an electric field15 6.1 Overhead lines 15 6.2 Underground cables 15 6.3 Substation
12、s and power system equipment .15 7 Measurement procedures for finding the maximum exposure level to a magnetic field16 7.1 Overhead lines 16 7.2 Underground cables 16 7.3 Substations and power system equipment .16 Annex A (informative) Characteristics of electric fields generated by AC overhead line
13、s18 Annex B (informative) Characteristics of magnetic fields generated by AC power systems 30 Annex C (informative) Concept of the three-point measurement with regard to the average exposure level.42 Annex D (informative) Example of a reporting form for field measurement 47 Bibliography50 Figure 1 H
14、eights of the three-point measurement.13 Figure 2 Five-point measurement.14 Figure A.1 Linear charge distribution above ground .19 Figure A.2 General n-phase system with ground 20 Figure A.3 Electric field levels under an overhead transmission line.22 SANS 62110:2009This s tandard may only be used a
15、nd printed by approved subscription and freemailing clients of the SABS .62110 IEC:2009 3 Figure A.4 Electric field levels under an overhead transmission line with bundled conductors22 Figure A.5 Electric field levels and non-uniformity under a 77 kV overhead transmission line Effect of heights of c
16、onductors24 Figure A.6 Electric field levels and non-uniformity under a 500 kV overhead transmission line Effects of the heights of conductors 25 Figure A.7 Electric field levels under a 77 kV overhead transmission line Effect of separation between conductors.26 Figure A.8 Electric field levels and
17、non-uniformity under a 500 kV overhead transmission line Effect of separation between conductors.27 Figure A.9 Vertical and horizontal components of electric field levels under a 77 kV overhead transmission line .27 Figure A.10 Vertical and horizontal components of electric field levels under a 500
18、kV overhead transmission line28 Figure A.11 Electric field contour of a 25 kV overhead line.28 Figure A.12 Electric field profile along the wall of a building and at 1 m above ground level29 Figure B.1 Magnetic field levels under a 77 kV overhead transmission line 32 Figure B.2 Magnetic field levels
19、 under a 500 kV overhead transmission line 33 Figure B.3 Magnetic field levels and non-uniformity under a 77 kV overhead transmission line Effect of heights of conductors34 Figure B.4 Magnetic field levels and non-uniformity under a 500 kV overhead transmission line Effect of heights of conductors35
20、 Figure B.5 Magnetic field levels and non-uniformity under a 77 kV overhead transmission line Effect of separation between conductors.36 Figure B.6 Magnetic field levels under a 500 kV overhead transmission line Effect of separation between conductors.37 Figure B.7 Values of semi-major and semi-mino
21、r components (r.m.s.) of magnetic field levels under a 77 kV overhead transmission line .38 Figure B.8 Values of semi-major and semi-minor components (r.m.s.) of magnetic field levels under a 500 kV overhead transmission line .38 Figure B.9 Magnetic field levels and non-uniformity under an overhead
22、distribution line (6 600 V / 100 V)39 Figure B.10 Magnetic field levels and non-uniformity above underground cables Effect of buried depth .40 Figure B.11 Magnetic field levels and non-uniformity above underground cables Effect of separation between conductors.40 Figure B.12 Measured magnetic field
23、levels and non-uniformity around a 6 600 V pad-mounted transformer41 Figure B.13 Measured magnetic field levels and non-uniformity around 6 600 V vertical cables.41 Figure C.1 A spheroidal human model .42 Figure C.2 The model in the magnetic field generated by a straight cable 43 Figure C.3 Magnetic
24、 field levels generated by a straight cable .43 Figure C.4 The model in the magnetic field generated by three parallel cables 44 Figure C.5 Magnetic field levels generated by three balanced parallel cables 44 Figure C.6 The model in the magnetic field generated by underground cables .45 Figure C.7 M
25、agnetic field levels generated by underground cables 45 Figure C.8 The model in the magnetic field generated by overhead wires 46 SANS 62110:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 4 62110 IEC:2009 Figure C.9 Magnetic field level
26、s generated by balanced overhead wires 46 SANS 62110:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .62110 IEC:2009 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRIC AND MAGNETIC FIELD LEVELS GENERATED BY AC POWER SYSTEMS MEASUREMENT
27、 PROCEDURES WITH REGARD TO PUBLIC EXPOSURE 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 international co-operation on all
28、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 (hereafter referred to as “IEC Publica
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34、d 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 individual experts and members of its
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36、 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 of this IEC Publication may be the s
37、ubject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62110 has been prepared by IEC technical committee 106: Methods for the assessment of electric, magnetic and electromagnetic fields associated with human exposure. The
38、 text of this standard is based on the following documents: FDIS Report on voting 106/177/FDIS 106/185/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/
39、IEC Directives, Part 2. Terms defined in Clause 3 appear in italics throughout the document. SANS 62110:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 6 62110 IEC:2009 The committee has decided that the contents of this publication will
40、 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 reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The “colour inside” logo
41、 on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this publication using a colour printer. SANS 62110:2009This s tandard may only be used and printed by approved subs
42、cription and freemailing clients of the SABS .62110 IEC:2009 7 INTRODUCTION All populations of the world are now exposed to electric and magnetic fields and the levels will continue to increase with developing industry and technology. A number of countries have implemented regulations on public expo
43、sure to these fields. Therefore, in order to evaluate human exposure levels to these fields adequately, common measurement procedures are required by not only professionals of national authorities and electric power industries, but also the general public. This standard is applied to the measurement
44、 of fields generated by AC power systems in areas accessible to the public. It establishes a common measurement procedure to evaluate the exposure levels of the human body to electric and magnetic fields among the general public. The values obtained are for use to determine whether the fields comply
45、 with exposure limits by comparing them with the field limits for general public exposure such as the reference levels from the ICNIRP (International Commission on Non-Ionizing Radiation Protection) Guidelines 11), MPE (maximum permissible exposure) from the IEEE (Institute of Electrical and Electro
46、nics Engineers) 2 or in national regulations. If the values obtained are higher than the reference level or MPE, it does not necessarily mean that the basic restriction has been exceeded, in which case other methods must be used to ensure that basic restriction is not exceeded. The values obtained b
47、y using the procedures in this standard are for the load conditions occurring at the time of measurement. Therefore, in the case of magnetic field, in order to check compliance with some exposure guidelines or regulations these values may need to be extrapolated to take account of the maximum load o
48、f the circuits. This standard is not applicable to occupational exposure associated with, for example, the operation and/or maintenance of the power systems. Such exposure may occur when working inside a distribution or transmission substation, a power plant, in a manhole or a tunnel for underground
49、 cables, or on an overhead line tower or pole. _ 1)Numbers in square brackets refers to the Bibliography. SANS 62110:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 8 62110 IEC:2009 ELECTRIC AND MAGNETIC FIELD LEVELS GENERATED BY AC POWER SYSTEMS MEASUREMENT PROCEDURES WITH REGARD TO PUBLIC EXPOSURE 1 Scope This International Standard estab
