1、 IEC 60076-10 Edition 2.0 2016-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Power transformers Part 10: Determination of sound levels Transformateurs de puissance Partie 10: Dtermination des niveaux de bruit IEC 60076-10:2016-03(en-fr) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyrigh
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19、 questions contactez-nous: csciec.ch. IEC 60076-10 Edition 2.0 2016-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Power transformers Part 10: Determination of sound levels Transformateurs de puissance Partie 10: Dtermination des niveaux de bruit INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION
20、ELECTROTECHNIQUE INTERNATIONALE ICS 29.180 ISBN 978-2-8322-3252-1 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuil
21、lez vous assurer que vous avez obtenu cette publication via un distributeur agr. colour inside 2 IEC 60076-10:2016 IEC 2016 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 8 2 Normative references. 8 3 Terms and definitions 9 4 Sound power for different loading conditions 11 4.1 General . 11 4.2 Soun
22、d power at no-load excitation . 12 4.3 Sound power of the cooling device(s) 12 4.4 Sound power due to load current . 12 5 Sound level measurement specification 14 6 Instrumentation, calibration and accuracy . 15 7 Principal radiating surface 16 7.1 General . 16 7.2 Transformers with or without cooli
23、ng device . 16 7.3 Transformers in enclosures with cooling devices inside the enclosure 16 7.4 Transformers in enclosures with cooling devices outside the enclosure 17 7.5 Cooling devices mounted on a separate structure where the distance between the two principal radiating surfaces is 3 m . 17 7.6
24、Dry-type transformers 17 7.7 Dry-type air-core reactors 17 8 Prescribed contour 18 9 Microphone positions . 19 10 Calculation of the measurement surface area . 19 10.1 Measurement surface area for measuring distances up to 30 m 19 10.2 Measurement surface area for measuring distances larger than 30
25、m . 19 11 Sound measurement 20 11.1 Test conditions 20 11.1.1 Placement of test object . 20 11.1.2 Test energisation options . 20 11.1.3 Test application details 21 11.1.4 Prevailing ambient conditions . 21 11.2 Sound pressure method 21 11.2.1 General . 21 11.2.2 Test procedure . 21 11.2.3 Calculati
26、on of the spatially averaged sound pressure level 22 11.2.4 Validation of test measurements with respect to background noise 23 11.2.5 Calculation of environmental correction K . 23 11.2.6 Final correction for steady-state background noise and test environment . 25 11.3 Sound intensity method . 26 1
27、1.3.1 General . 26 11.3.2 Test procedure . 26 11.3.3 Calculation of average normal sound intensity and sound pressure level . 27 11.3.4 Measurement validation . 28 11.3.5 Final correction based on P-I index and direction flag . 28 IEC 60076-10:2016 IEC 2016 3 12 Determination of sound power level by
28、 calculation 29 13 Logarithmic addition and subtraction of individual sound levels . 29 14 Far-field calculations for distances larger than 30 m . 30 15 Presentation of results . 31 Annex A (informative) Narrow-band and time-synchronous measurements 40 A.1 General considerations 40 A.2 Narrow-band m
29、easurement . 40 A.2.1 General . 40 A.2.2 Post processing of narrow-band measurements to exclude background noise . 41 A.3 Time-synchronous averaging technique . 41 Annex B (informative) Typical report of sound level determination . 42 B.1 Sound pressure method 42 B.2 Sound pressure method Appendix f
30、or the point-by-point procedure 50 B.3 Sound intensity method . 51 B.4 Sound intensity method Appendix for the point-by-point procedure 59 Bibliography . 60 Figure 1 Typical microphone path / positions for sound measurement on transformers excluding cooling devices . 33 Figure 2 Typical microphone p
31、ath / positions for sound measurement on transformers having cooling devices mounted either directly on the tank or on a separate structure spaced 3 m away from the principal radiating surface of the main tank 34 Figure 3 Typical microphone path / positions for sound measurement on transformers havi
32、ng separate cooling devices spaced 3 m away from the principal radiating surface of the main tank 35 Figure 4 Typical microphone path / positions for sound measurement on cooling devices mounted on a separate structure spaced 3 m away from the principal radiating surface of the transformer . 36 Figu
33、re 5 Typical microphone positions for sound measurement on dry-type transformers without enclosures 37 Figure 6 Principle radiating surface and prescribed contour of dry-type air-core reactors 38 Figure 7 Environmental correction, K 39 Table 1 Test acceptance criteria . 23 Table 2 Approximate values
34、 of the average acoustic absorption coefficient . 25 4 IEC 60076-10:2016 IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ POWER TRANSFORMERS Part 10: Determination of sound levels FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comp
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44、ormative 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 not be held re
45、sponsible for identifying any or all such patent rights. International Standard IEC 60076-10 has been prepared by IEC technical committee 14: Power transformers This second edition cancels and replaces the first edition published in 2001 and constitutes a technical revision. This edition includes th
46、e following significant technical changes with respect to the previous edition: additional useful definitions introduced; definition of distribution type transformers introduced for the purpose this standard; new clause for sound level measurement specification introduced; requirement for 1/3 octave
47、 band measurements introduced for transformers other than distribution type transformers; IEC 60076-10:2016 IEC 2016 5 standard measurement distance changed from 0,3 m to 1 m for transformers other than distribution type transformers; height of measurement surface is now clearly defined to count fro
48、m the reflecting plane; measurement surface formula unified; correction criteria for intensity method introduced; rules for sound measurements on dry-type reactors introduced; figures revised; new informative test report templates introduced (Annex B); IEC 60076-10-1 (application guide) revised in p
49、arallel providing worthwhile information for the use of this standard. The text of this standard is based on the following documents: FDIS Report on voting 14/846/FDIS 14/849/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/IEC Directives, Part 2. A list of all par
