GB/T 1094.101-2023 English PDFUS$739.00 · In stock
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Basic dataStandard ID: GB/T 1094.101-2023 (GB/T1094.101-2023)Description (Translated English): Power transformers - Part 101: Determination of sound levels - Application guide Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K41 Classification of International Standard: 29.180 Word Count Estimation: 38,343 Date of Issue: 2023-03-17 Date of Implementation: 2023-10-01 Older Standard (superseded by this standard): GB/T 1094.101-2008 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 1094.101-2023: Power transformers - Part 101: Determination of sound levels - Application guide---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.ICS29:180 CCSK41 National Standards of People's Republic of China Replace GB/T 1094:101-2008 power transformer Part 101: Guidelines for the application of sound level determination Power transformers - (IEC 60076-10-1:2016, Powertransformers- Released on 2023-03-17 2023-10-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee table of contentsPreface III Introduction V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Physical Basis of Sound 1 5 Noise sources and characteristics of transformers and reactors 4 6 Measuring principle 12 7 Precautions for sound level measurement 20 8 Differences between factory test and on-site sound level measurement 22 Appendix A (informative) Sound levels caused by harmonic currents in windings 25 Reference 30 Fig:1 Simulation of spatially averaged sound intensity level (solid line) and sound pressure level (dashed line) at different measurement distances d in the near field3 Figure 2 The maximum magnetic induction intensity Bmax of a certain brand of iron core steel sheet is complete when it changes from 1:2T to 1:9T when 50Hz AC is applied Relative change curve of lamination length under cyclic state 4 Fig: 3 Function curve of flux density changing with time when peak flux density is 1:8T and frequency is 50Hz AC without DC bias (smooth line) and the relative change of lamination length with time (dashed line) 5 Figure 4: The relative change curve of the lamination length when the 50Hz complete AC cycle is applied, the peak magnetic density reaches 1:8T, and the DC bias is 0:1T Example 5 Fig:5 The curves (smooth lines) and The curve of the relative change of lamination length with time (dotted line) 6 Figure 6 The relationship between the sound level increase and the DC bias current in the winding6 Figure 7 Typical sound spectrum caused by load current7 Fig:8 100Hz sound pressure field (color) of 31:5MVA transformer and sound intensity vector simulation along the measurement path11 Fig:9 A-weighted graph derived from function A(f)12 Fig: 10 Disturbance distribution affecting sound pressure in the test environment Fig: 14 Figure 11 Microphone arrangement 15 Figure 12 Schematic diagram of the background noise passing through the test area and the noise emitted by the test object16 Figure 13 Transformer tones for 1/1 octave and 1/3 octave in 50Hz and 60Hz systems 17 Figure 14 Record of spatial variation of sound pressure along the measurement path19 Figure 15 Test environment 20 Figure A:1 Current waveforms for the current spectrum of the star junction and delta junction windings given in Table A:2 26 Table 1 A-weighted values of transformer tones from 1st to 15th order13 Table A:1 Components of winding electromotive forces caused by harmonic currents 25 Table A:2 Current spectrum caused by B6 commutation 26 Table A:3 Calculation of test current and force components 27 Table A:4 Summary of Harmonic Force and Test Current 28forewordThis document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting: This document is part 101 of GB/T 1094 "Power Transformers": GB/T 1094 has issued the following parts: --- Part 1: General; --- Part 2: Temperature rise of liquid-immersed transformers; --- Part 3: Insulation level, insulation test and outer insulation air gap; --- Part 4: Lightning impulse and operating impulse test guidelines for power transformers and reactors; --- Part 5: Ability to withstand short circuit; --- Part 6: Reactors; --- Part 7: Load guidelines for oil-immersed power transformers; --- Part 10: Determination of sound level; --- Part 101: Application Guidelines for Sound Level Determination; --- Part 11: Dry-type transformers; --- Part 12: Load guidelines for dry-type power transformers; --- Part 14: Liquid-immersed power transformers using high-temperature insulating materials; --- Part 15: Gas-filled power transformers; --- Part 16: Transformers for wind power generation; --- Part 18: Frequency response measurement; --- Part 23: DC bias suppression device: This document replaces GB/T 1094:101-2008 "Power Transformers Part 10:1: Guidelines for the Application of Sound Level Determination", and Compared with GB/T 1094:101-2008, except for structural adjustment and editorial changes, the main technical changes are as follows: --- Added more sound field information (see Chapter 4); --- Increased consideration of the influence of winding current harmonics (see 5:2); --- Added description of A-weighting (see 6:2); --- Added information on sound pressure measurement and sound intensity measurement (see 6:3:2 and 6:3:3); --- Added frequency band information (see 6:4); --- Added background information for measuring distances (see 6:6); --- Added support information for walking movement measurement method and point-by-point measurement method (see 6:7); --- Added additional noise caused by winding harmonic current (see Appendix A): This document is modified to adopt IEC 60076-10-1:2016 "Power Transformers Part 10-1: Guidelines for the Application of Sound Level Determination": This document adds Chapter 3 "Terms and Definitions", and the corresponding chapters and article numbers are sequentially extended: The technical differences between this document and IEC 60076-10-1:2016 and the reasons are as follows: --- Added a reference to GB/T 2900:95 in Chapter 2; ---Adjust the last paragraph of 4:2:5:3 from the main text to a note (because the appendix A involved is informative); --- In order to coordinate with the content of 6:2, the last paragraph of 3:2 of the IEC original text "the peak sensitivity to frequency is about 1kHz, with reduced sensitivity at lower or higher frequencies": The following editorial changes have been made to this document: ---Incorporated the amendments of IEC 60076-101-1:2016/AMD1:2020; --- In order to coordinate with our country's standard, change the name of the standard to "Power Transformer Part 101: Guidelines for the Application of Sound Level Determination"; ---Adjusted the number of the formula; ---Adjust the items in A:3 to the form of clauses; --- Adjust "iTn" in the header of Table A:3 to "inT"; --- Correct the two test current values corresponding to the:200Hz harmonic noise frequency in Table A:4 from "0:630" to "0:632"; ---Adjust ISO 3746:2010 in the original IEC reference as a normative reference; --- The references have been adjusted: Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed by China Electrical Equipment Industry Association: This document is under the jurisdiction of the National Transformer Standardization Technical Committee (SAC/TC44): This document is drafted by: Shenyang Transformer Research Institute Co:, Ltd:, Baoding Tianwei Baobian Electric Co:, Ltd:, China Electric Power Research Institute Research Institute Co:, Ltd:, TBEA Hengyang Transformer Co:, Ltd:, Chint Electric Co:, Ltd:, Xi'an Xidian Transformer Co:, Ltd:, TBEA Shenyang Transformer Group Co:, Ltd:, TBEA Co:, Ltd: Xinjiang Transformer Factory, Pearl Electric Co:, Ltd:, Wu Jiang Transformer Co:, Ltd:, Guangdong Zhongpeng Electric Co:, Ltd:, Shunte Electric Equipment Co:, Ltd:, Zhejiang Jiangshan Transformer Co:, Ltd:, Cheng Lai Electric Technology Co:, Ltd:, Tianjin TBEA Transformer Co:, Ltd:, Haihong Electric Co:, Ltd:, Changzhou Xidian Transformer Co:, Ltd: Company, Hefei Yuanzhen Power Technology Co:, Ltd: The main drafters of this document: Zhang Xianzhong, Guo Mansheng, Wang Xinsheng, Su Zhonghuan, Guan Junjun, Zhang Pengfei, Dong Chunguang, Yu Jinhua, Cai Dingguo, Lin Canhua, Han Baojia, Xiao Ming, Jiang Zhenjun, Zheng Guopei, Zhao Wenzhong, Xu Kaixuan, Chen Xinfu, Xiong Shifeng: The documents replaced by this document and the release status of previous versions are as follows: ---GB/T 1094:101-2008 was released for the first time in:2008; --- This is the first revision:IntroductionThe formulation of power transformer standards is to establish a set of best evaluation criteria for power transformers, and to select raw materials for power transformers: Provide guidance on matters needing attention in selection, design, production, inspection, selection, operation, maintenance, etc: GB/T 1094 aims to establish the applicable The design, manufacture, test, operation, maintenance and other aspects of power transformers follow the principles and related rules, and are proposed to be composed of 16 parts: --- Part 1: General: The purpose is to establish the requirements to be followed in the design, manufacture and production test of various power transformers: General principles and related rules: --- Part 2: Temperature rise of liquid-immersed transformers: The purpose is to establish the relevant temperature rise applicable to all kinds of liquid-immersed power transformers technical requirements and test methods: --- Part 3: Insulation level, insulation test and outer insulation air gap: The purpose is to establish suitable for all kinds of liquid-immersed power transformers Technical requirements and insulation test methods for insulation level, insulation test and external insulation air gap: --- Part 4: Lightning impulse and operating impulse test guidelines for power transformers and reactors: The purpose is to establish the applicable Technical requirements and test methods for lightning impulse tests and operating impulse tests of power transformers and reactors: --- Part 5: Ability to withstand short-circuit: The purpose is to establish the standards applicable to various types of power transformers in terms of short-circuit withstand capacity: Technical requirements and test methods: --- Part 6: Reactor: The purpose is to establish the technical requirements and test requirements applicable to various reactors: --- Part 7: Load guidelines for oil-immersed power transformers: The purpose is to provide relevant information on the load operation of various oil-immersed power transformers provide guidance: --- Part 10: Determination of sound level: The purpose is to establish the sound level measurement technology applicable to various power transformers and reactors: Technical requirements and test methods: --- Part 101: Application guidelines for sound level determination: The purpose is to test the sound level measurement application methods of various power transformers and reactors: provide guidance: --- Part 11: Dry-type transformers: The purpose is to establish the technical requirements and test requirements applicable to various dry-type power transformers: --- Part 12: Load guidelines for dry-type power transformers: The purpose is to provide various dry-type power transformers with load operation for guidance: --- Part 14: Liquid-immersed power transformers using high-temperature insulating materials: The purpose is to establish suitable for all kinds of high temperature insulation Material technical requirements and test requirements for liquid-immersed power transformers: --- Part 15: Inflatable power transformers: The purpose is to establish the technical requirements and test requirements applicable to various types of gas-filled power transformers: inspection requirements: --- Part 16: Transformers for wind power generation: The purpose is to establish the technical requirements and test requirements applicable to all kinds of wind power transformers: inspection requirements: --- Part 18: Frequency response measurement: The purpose is to establish the technical requirements applicable to the frequency response of various power transformers Summation test method: --- Part 23: DC bias suppression device: The purpose is to establish the technical requirements and test conditions applicable to various DC bias suppression devices: inspection requirements: GB/T 1094 clarifies the technical content of various power transformers and reactors through 16 parts, and gives specific technical specifications: Technical requirements, test items, test procedures, test methods and operation guidance, etc: By establishing clear scope, terminology and technical requirements for various products and test requirements, etc:, so that personnel engaged in related product design, production, testing, use, operation and maintenance can more clearly and accurately To operate, so as to lay the foundation for the design and manufacture of high-quality products, better promote trade, exchanges and technical cooperation, and provide my country's power grid normal operation is guaranteed: This document is used in conjunction with GB/T 1094:10: power transformer Part 101: Guidelines for the application of sound level determination1 ScopeThis document provides guidance to manufacturers and users on how to use the measurement techniques specified in GB/T 1094:10: except basic acoustics In addition to the principles, this document describes the noise sources and characteristics of transformers and reactors, gives practical guidelines for making measurements, and discusses possible effects: Various factors that affect the accuracy of the measurement method are also explained, and the reasons why the factory measured value differs from the field measured value are also clarified: This document applies to transformers and reactors and their associated auxiliary cooling equipment:2 Normative referencesThe contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document: GB/T 1094:10-2022 Power Transformers Part 10: Determination of Sound Level (IEC 60076-10:2016, MOD) Note: There is no technical difference between the referenced content of GB/T 1094:10-2022 and the referenced content of IEC 60076-10:2016: GB/T 2900:95 Electrotechnical terms transformers, voltage regulators and reactors (GB/T 2900:95-2015, IEC 60050-421: 1990,NEQ) GB/T 3768-2017 Acoustic sound pressure method for the determination of sound power level and sound energy level of noise sources using the envelope measurement surface above the reflecting surface The simplified method (ISO 3746:2010, IDT)3 Terms and DefinitionsThe terms and definitions defined in GB/T 2900:95 and GB/T 1094:10-2022 apply to this document:4 Physical basis of sound4:1 Phenomena Sound is a pressure change wave (in air, water or other elastic medium) that can be felt by the human ear: This pressure change wave passes through the medium (this The file refers to the air) from the sound source to the listener's ear: The number of times a cyclical pressure change occurs per second is called the frequency of the sound, and its measurement is in Hertz (Hz): specific frequency of sound Perceived as a distinct tone or pitch: The hum of a transformer is basically a low frequency sound at 100Hz or 120Hz, while the whistle is a high frequency sound Sound, its typical frequency value exceeds 3kHz: The normal hearing range of healthy young people is about 20Hz~20kHz: 4:2 Sound pressure p The root-mean-square value of the instantaneous sound pressure at a specific location and a given time interval is called the sound pressure, and the unit of its measurement is Pascal (Pa): Sound pressure is a scalar quantity, and its characteristic is expressed only by its amplitude: The weakest sound pressure that a healthy human ear can perceive has a clear relationship with frequency: Generally, it is 20μPa at 1kHz: perceived pain threshold It should be one million times of this value, or even higher, such as 20Pa: Due to the large range, in order to avoid using large values, decibels (dB) are used ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 1094.101-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 1094.101-2023_English as soon as possible, and keep you informed of the progress. 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