SANS 61000-4-7-2009 Electromagnetic compatibility (EMC) Part 4-7 Testing and measurement techniques - General guide on harmonics and interharmonics measurements and instrumentationcte.pdf

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 978-0-626-23720-2 SANS 61000-4-7:2009Edition 2.1 (incorporating IEC corr. 1)IEC 61000-4-7:2009Edition 2.1 (incorporating corr. 1)SOUTH AFRICAN NATIO

4、NAL STANDARD Electromagnetic compatibility (EMC) Part 4-7: Testing and measurement techniques General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems nd equipment connected thereto aThis national standard is the identical implementation of IEC 61000-4

5、-7:2009 (which incorporates IEC corrigendum 1), and is adopted with the permission of the International Electrotechnical Commission. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 6100

6、0-4-7:2009 Edition 2.1 (incorporating IEC corr. 1) IEC 61000-4-7:2009 Edition 2.1 (incorporating corr. 1) Table of changes Change No. Date Scope IEC corr. 1 2004 Amended to correct two equations related to frequency analysis in 3.1. IEC amdt 1 2008 Amended to provide more detailed information on har

7、monics and interharmonics by means of additional references and definitions, and new equations, figures, tables and text. National foreword This South African standard was approved by National Committee SABS TC 73, Electromagnetic compatibility, in accordance with procedures of the SABS Standards Di

8、vision, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in December 2009. This SANS document supersedes SANS 61000-4-7:2003 (edition 2 as modified by IEC corr. 1:2004 and IEC amdt 1:2008). IEC 61000-4-7Edition 2.1 2009-10INTERNATIONAL STANDARD NORME INTERNATIONA

9、LEElectromagnetic compatibility (EMC) Part 4-7: Testing and measurement techniques General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto Compatibilit lectromagntique (CEM) Partie 4-7: Techniques dessai et de mesure Gu

10、ide gnral relatif aux mesures dharmoniques et dinterharmoniques, ainsi qu lappareillage de mesure, applicable aux rseaux dalimentation et aux appareils qui y sont raccords INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE CJICS 33.100.10; 33.100.20 PRICE CODECODE P

11、RIXISBN 2-8318-1062-6BASIC EMC PUBLICATION PUBLICATION FONDAMENTALE EN CEM Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale colourinsideSANS 61000-4-7:2009This s tandard may only be used and printed by approved subscr

12、iption and freemailing clients of the SABS . 2 61000-4-7 IEC:2002+A1:2008 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references .7 3 Definitions, symbols and indices.8 3.1 Definitions related to frequency analysis .8 3.2 Definitions related to harmonics 9 3.3 Definitions related to dis

13、tortion factors 10 3.4 Definitions related to interharmonics .11 3.5 Notations.12 3.5.1 Symbols 12 3.5.2 Subscripts .13 4 General concepts and common requirements for all types of instrumentation .14 4.1 Characteristics of the signal to be measured .14 4.2 Accuracy classes of instrumentation14 4.3 T

14、ypes of measurement 14 4.4 General structure of the instrument .14 4.4.1 Main instrument.14 4.4.2 Post-processing parts16 5 Harmonic measurements 16 5.1 Current input circuit.16 5.2 Voltage input circuit.17 5.3 Accuracy requirements17 5.4 Measurement set-up and supply voltage19 5.4.1 Measurement set

15、-up for emission assessment.19 5.4.2 Supply voltage for emission assessment .19 5.4.3 Equipment power.21 5.5 Assessment of harmonic emissions .21 5.5.1 Grouping and smoothing21 5.5.2 Compliance with emission limits 23 5.6 Assessment of voltage harmonic subgroups 23 6 Other analysis principles 23 7 T

16、ransitional period24 8 General 24 Annex A (informative) Measurement of interharmonics 25 Annex B (informative) Measurements above the harmonic frequency range up to 9 kHz27 Annex C (informative) Technical considerations for grouping method.32 Bibliography41 SANS 61000-4-7:2009This s tandard may only

17、 be used and printed by approved subscription and freemailing clients of the SABS .61000-4-7 IEC:2002+A1:2008 3 Figure 1 General structure of the measuring instrument.15 Figure 2 Measurement set-up for single-phase emission measurement19 Figure 3 Measurement set-up for three-phase emission measureme

18、nts .19 Figure 4 Illustration of harmonic and interharmonic groups (here shown for a 50-Hz supply) .21 Figure 5 Realization of a digital low-pass filter: z1 designates a window width delay, and are the filter coefficients (see Table 2 for values).22 Figure 6 Illustration of a harmonic subgroup and a

19、n interharmonic centred subgroup (here shown for a 50 Hz supply) .23 Figure B.1 Illustration of frequency bands for measurement in the range above the 40thharmonic order for 50 Hz power system up to 9 kHz 28 Figure B.2 General measurement setup .29 Figure B.3 Artificial mains network for 16-A curren

20、t and below.30 Figure B.4 Artificial mains network impedance viewed by the EUT .31 Figure C.1 Large 5th harmonic current fluctuation35 Figure C.2 Large 5th harmonic voltage fluctuation .35 Figure C.3 Fluctuating 3rd harmonic current of a micro-wave appliance.36 Figure C.4 Communication signal of 178

21、 Hz together with 3rd and 5th harmonics 37 Figure C.5 Interharmonic at 287 Hz, 5th and 6th harmonic.37 Figure C.6 Modulated 5th harmonic and interharmonic at 287 Hz.39 Figure C.7 Component vectors at frequencies of 245 Hz and 255Hz 40 Table 1 Accuracy requirements for current, voltage and power meas

22、urements.18 Table 2 Smoothing filter coefficients according to the window width.22 SANS 61000-4-7:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 4 61000-4-7 IEC:2002+A1:2008 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTROMAGNETIC CO

23、MPATIBILITY (EMC) Part 4-7: Testing and measurement techniques General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for stan

24、dardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote 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 In

25、ternational Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may particip

26、ate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement betwee

27、n the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications

28、 have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all 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

29、misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding n

30、ational or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any servic

31、es carried out by independent certification bodies. 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 technical committees and IEC Natio

32、nal 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, this IEC Publication or any other IEC Publications. 8) Attention is

33、 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 subject of patent rights. IEC shall

34、 not be held responsible for identifying any or all such patent rights. International Standard IEC 61000-4-7 has been prepared by subcommittee 77A: Low frequency phenomena, of IEC technical committee 77: Electromagnetic compatibility. This consolidated version of IEC 61000-4-7 consists of the second

35、 edition (2002) documents 77A/382/FDIS and 77A/387/RVD, its amendment 1 (2008) documents 77A/645/FDIS and 77A/651/RVD and its corrigendum of July 2004. The technical content is therefore identical to the base edition and its amendment and has been prepared for user convenience. It bears the edition

36、number 2.1. SANS 61000-4-7:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .61000-4-7 IEC:2002+A1:2008 5 A vertical line in the margin shows where the base publication has been modified by amendment 1. This standard forms part 4-7 of IEC 6

37、1000. It has the status of a basic EMC publication in accordance with IEC Guide 107. Annexes A, B and C are for information only. The committee has decided that the contents of the base publication and its amendments will remain unchanged until the maintenance result date indicated on the IEC web si

38、te 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 on the cover page of this publication indicates that it contains colours which

39、 are considered to be useful for the correct understanding of its contents. Users should therefore print this publication using a colour printer. SANS 61000-4-7:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 6 61000-4-7 IEC:2002+A1:2008

40、 INTRODUCTION IEC 61000 is published in separate parts, according to the following structure: Part 1: General General considerations (introduction, fundamental principles) Definitions, terminology Part 2: Environment Description of the environment Classification of the environment Compatibility leve

41、ls Part 3: Limits Emission limits Immunity limits (in so far as they do not fall under the responsibility of the product committees) Part 4: Testing and measurement techniques Measurement techniques Testing techniques Part 5: Installation and mitigation guidelines Installation guidelines Mitigation

42、methods and devices Part 6: Generic standards Part 9: Miscellaneous Each part is further subdivided into several parts, published either as International Standards or as technical specifications or technical reports, some of which have already been published as sections. Other will be published with

43、 the part number followed by a dash and a second number identifying the subdivision (example: 61000-6-1). These publications will be published in chronological order and numbered accordingly. This part is an International Standard for the measurement of harmonic currents and voltages in power supply

44、 systems and harmonic currents emitted by equipment. It also specifies the performance of a standard measuring instrument. SANS 61000-4-7:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .61000-4-7 IEC:2002+A1:2008 7 ELECTROMAGNETIC COMPATI

45、BILITY (EMC) Part 4-7: Testing and measurement techniques General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto 1 Scope This part of IEC 61000 is applicable to instrumentation intended for measuring spectral component

46、s in the frequency range up to 9 kHz which are superimposed on the fundamental of the power supply systems at 50 Hz and 60 Hz. For practical considerations, this standard distinguishes between harmonics, interharmonics and other components above the harmonic frequency range, up to 9 kHz. This standa

47、rd defines the measurement instrumentation intended for testing individual items of equipment in accordance with emission limits given in certain standards (for example, harmonic current limits as given in IEC 61000-3-2) as well as for the measurement of harmonic currents and voltages in actual supp

48、ly systems. Instrumentation for measurements above the harmonic frequency range, up to 9 kHz is tentatively defined (see Annex B). NOTE 1 This document deals in detail with instruments based on the discrete Fourier transform. NOTE 2 The description of the functions and structure of the measuring ins

49、truments in this standard is very explicit and meant to be taken literally. This is due to the necessity of having reference instruments with reproducible results irrespective of the characteristics of the input signals. NOTE 3 The instrument is defined to accommodate measurements of harmonics up to the 50th order. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only