GB/T 32524.1-2016Acoustics—Determination of sound power level and directivity character of power capacitor unit using sound pressure—Part 1: Precision method for hemi-anechoic rooms (English PDF)
声学 声压法测定电力电容器单元的声功率级和指向特性 第1部分：半消声室精密法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
February 24, 2016
Implementation date
September 1, 2016
Scope
GB/T 32524.1-2016 is the English-translated version of 声学 声压法测定电力电容器单元的声功率级和指向特性 第1部分：半消声室精密法.
GB/T 32524.1-2016 is the Chinese standard "Acoustics—Determination of sound power level and directivity character of power capacitor unit using sound pressure—Part 1: Precision method for hemi-anechoic rooms".
Its scope clause reads: This part of GB/T 32524 specifies the power capacitor unit (hereinafter referred to as. capacitor unit) in a semi-free field environment (semi-silencer Chamber) by determining the sound pressure level measured on the measurement surface surrounding the capacitor unit to determine the precision of the sound level and the direction of the capacitor unit Level (GB/T 19052 level 1 accuracy) method.
The test frequency range in this section is the range in which the center frequency is covered by the 1/3 octave band of 100 Hz to 4000 Hz. base on needs, 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. Its clauses include normative reference documents; terms and definitions.
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Document preview — GB/T 32524.1-2016
National Standard of the People's Republic of China
- ICS
- 17.140
- Classification
- A 59
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Preface
- Introduction
- 1 Scope
- 2 normative reference document
- 3 Terms and definitions
- 4 Meteorological conditions
- 5 test environment and requirements
- 7 Installation requirements for capacitor units
- 8 Capacitor Unit Loading
- 9 Measuring surface and measuring point position
- 11 Calculation of sound power level
- 14 record content
- Appendix A (Normative Appendix) Calculate A-weighted sound power level with 1/3 octave sound power level
- Appendix B (informative) Guidelines for measuring uncertainty
- Appendix C (informative) Capacitor units Sound power level and pointing characteristics Measurement record table
1 Scope
This part of GB/T 32524 specifies the power capacitor unit (hereinafter referred to as. capacitor unit) in a semi-free field environment (semi-silencer
Chamber) by determining the sound pressure level measured on the measurement surface surrounding the capacitor unit to determine the precision of the sound level and the direction of the capacitor unit
Level (GB/T 19052 level 1 accuracy) method.
The test frequency range in this section is the range in which the center frequency is covered by the 1/3 octave band of 100 Hz to 4000 Hz. base on needs,
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
Electroacoustics - Sound level gauges - Part 1. Specifications
GB/T 6882-2016 Acoustic sound pressure method for the determination of noise sources of sound power and acoustic energy level of anechoic chamber and semi-anechoic chamber precision method
GB/T 15173 electroacoustic sound calibrator
High voltage test technology - Part 1. General definitions and test requirements GB/T 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
The difference between instantaneous pressure and static pressure.
Note. The sound pressure unit is Pa (Pa).
[GB/T 6882-2016, definition 3.1]
3.2 Time average sound pressure level
Lp, T
At the specified duration interval T (starting at t1, terminating in t2), the ratio of the mean value of the sound pressure p square to the square of the reference value […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 27 pages — is available in the English PDF.
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