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GB/T 32524.2-2016 English PDF

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GB/T 32524.2-2016: Acoustics -- Determination of sound power level and directivity character of power capacitor using sound pressure -- Part 2：Engineering methods for an essentially free field over a reflecting plane
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GB/T 32524.2-2016English799 Add to Cart 6 days [Need to translate] Acoustics -- Determination of sound power level and directivity character of power capacitor using sound pressure -- Part 2：Engineering methods for an essentially free field over a reflecting plane Valid GB/T 32524.2-2016

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Basic data

Standard ID GB/T 32524.2-2016 (GB/T32524.2-2016)
Description (Translated English) Acoustics -- Determination of sound power level and directivity character of power capacitor using sound pressure -- Part 2��Engineering methods for an essentially free field over a reflecting plane
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A59
Classification of International Standard 17.140
Word Count Estimation 40,468
Date of Issue 2016-02-24
Date of Implementation 2016-09-01
Regulation (derived from) National Standard Announcement No
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 32524.2-2016: Acoustics -- Determination of sound power level and directivity character of power capacitor using sound pressure -- Part 2：Engineering methods for an essentially free field over a reflecting plane



---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Acoustics - Determination of sound power level and directivity character of power capacitor using sound pressure - Part 2. Engineering methods for an radical free field over a RMS plane ICS 17.140 A59 National Standards of People's Republic of China Acoustic pressure measurement of power capacitor units Sound power level and pointing characteristics Part 2. engineering method for the approximate free field above the reflective surface Acoustics-Determination ofsoundpowerlevelanddirectivitycharacter Part 2. Engineeringmethodsforanessentialy 2016-02-24 released 2016-09-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released Directory Preface I Introduction II 1 Scope 1 2 normative reference document 1 3 Terms and definitions 1 4 Test environment and requirements 5 5 Equipment and equipment requirements 7 Installation and Requirements of Capacitor Unit 7 Capacitor unit loading 8 8 Measuring surface and measuring point position 10 9 Determination of sound power level 11 Measurement Uncertainty 13 Record content 12 Test Report 15 Appendix A (normative appendix) Acoustic environment identification method 16 Appendix B (normative appendix) Calculate A-weighted sound power level with 1/3 octave sound power level Appendix C (normative appendix) sound power level under standard weather conditions 22 Appendix D (informative) Guidelines for measuring uncertainty Appendix E (informative) Capacitor unit Sound power level and pointing characteristics Measurement record table 33 Reference 34

Foreword

GB/T 32524 "Acoustic pressure measurement of power capacitor unit of the sound power level and pointing characteristics" is divided into two parts. - Part 1. semi - anechoic chamber precision method; Part 2. Engineering method for approximate free field above the reflective surface. This part is part 2 of GB/T 32524. This part is drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. The issuer of this document does not assume responsibility for the identification of these patents. This part is presented by the Chinese Academy of Sciences. This section is under the jurisdiction of the National Acoustics Standardization Technical Committee (SAC/TC17). This part of the drafting unit. Hefei University of Technology, China Southern Power Grid Science Research Institute limited liability company, Shenzhen Ya Ya Electrical and Mechanical Industry Co., Ltd., Institute of Acoustics, Chinese Academy of Sciences, Guilin Power Capacitor Co., Ltd., Beijing Institute of Labor Protection Science, Zhejiang University. This part of the main drafters. Li Zhiyuan, Huang Ying, Fang Qingchuan, Cheng Mingkun, Liang Cong, Lu Yadong, Li Xiaodong, Xu Xin, Kuang Dongwei, Lu Yimin, Huang Cheng, Chen Zhang bit.

Introduction

In order to be able to conduct a unified evaluation and comparison of the noise emitted by the power capacitor and to design the noise of the specific project of the power system With the basis of the control provided, this part of the provisions of a reflective surface above the free surface of the environment, the use of sound pressure measurement of power capacitor single The engineering level of the noise power level and the pointing characteristics of the radiation in the engineering conditions required by the project. In order to ensure the measurement of this part of the energy To meet the GB/T 19052 requirements of the project level (2) measurement requirements, this part of the focus on the actual operation of the power capacitor to load, measured Test equipment selection and use, test the environment requirements, installation conditions, measuring surface and measuring point layout and other issues given the specific provisions. The method specified in this section measures the sound power level and expression orientation characteristics of the power capacitor unit using the band sound level or the A-weighted sound level. The sound power level and pointing characteristics measured according to the method of this part can be used to improve the noise level of the same type of power capacitor unit Line comparison, for the specific project to provide the basis for noise design. Acoustic pressure measurement of power capacitor units Sound power level and pointing characteristics Part 2. engineering method for the approximate free field above the reflective surface

1 Scope

This part of GB/T 32524 specifies that the power capacitor unit (hereinafter referred to as the capacitor unit) is approximately free on top of a reflective surface The method of determining the sound power level of the capacitor unit by the sound pressure level measured on the measurement surface surrounding the capacitor unit, Part of the measurement of the uncertainty in line with GB/T 19052 engineering level (2) requirements. The frequency range of this part is to include a frequency band with a center frequency of 125Hz ~.2000Hz or a center frequency of 100Hz ~ 3150Hz 1/3 times the frequency band, according to the need, the frequency range can be expanded or reduced, but the measurement environment should meet the frequency range requirements. This part applies to the nominal voltage 1kV and above the AC filter capacitors, DC filter capacitors, shunt capacitors, other electricity Force capacitors can be specified with this section.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. GB/T 3241 electroacoustics octave and fractional octave filters GB/T 3767-2016 Acoustic sound pressure level measurement Noise source Sound power level Harmony energy level Approximate free field on the reflection surface Process method Electroacoustics - Sound level gauges - Part 1. Specifications GB/T 4129-2003 Acoustics Performance and calibration requirements for standard sound sources for sound power level measurement GB/T 6882 Acoustic vocal pressure method for the determination of noise sources Sound power level Anechoic chamber and semi-anechoic chamber precision method GB/T 15173 electroacoustic sound calibrator GB/T 16538 Acoustic vocal pressure method for the determination of noise source sound power level field comparison method High voltage test technology - Part 1. General definitions and test requirements GB/T GB/T 19052 Guidelines for the drafting and presentation of noise noise test specifications for acoustic machines and equipment radiation GB/T 20993 DC Filter Capacitor and Neutral Bus Impact Capacitor for HVDC System GB/T 20994 HVDC system with parallel capacitors and AC filter capacitors Safety rules for electrical safety - Part

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Sound pressure soundpressure The difference between instantaneous pressure and static pressure. Note. The unit is Pascal (Pa).

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