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如果买家需要PDF格式的本标准，可以提供邮箱给我（前提是购买了本标准），我免费发送到你的邮箱。标标准王国豆丁网标准下载地址 BRITISH STANDARD BS EN60034-9:1998IEC 60034-9:1997Rotating electrical machines -,-,-Part 9: Noise limitsThe European Standard EN 60034-9:1997 has the status of aBritish StandardICS 17.140.20; BS EN 60034-9:1998National forewordThis British Standard is the English language version of EN 60034-9:1997. It is identical with IEC 60034-9:1997. It supersedes BS EN 60034-9:1994 which is withdrawn.The UK participation in its preparation was entrusted to Technical CommitteePEL/2, Rotating electrical machinery, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK.A list of organizations represented on this committee can be obtained on request to its secretary.From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems.Cross-referencesAttention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue.A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 8 and a back cover.This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.-,-,-Amd. No.DateCommentsThis British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board andcomes into effect on15 February 1998 BSI 04-1999ISBN 0 580 29360 2Amendments issued since publicationBS EN 60034-9:1998ContentsPage National forewordInside front cover Foreword2Text of EN 60034-93-,-,- BSI 04-1999i-,-,-iiblankEUROPEAN STANDARD NORME EUROPENNEEUROPISCHE NORMEN 60034-9August 1997ICS 17.140.20; 29.160.30Supersedes EN 60034-9:1993 and its amendmentDescriptors: Electrical rotating machinery, machinery noise, noise limit, sound power density, sound power, maximum valueEnglish versionRotating electrical machinesPart 9: Noise limits(IEC 60034-9:1997)Machines lectriques tournantesPartie 9: Limites de bruit(CEI 60034-9:1997)Drehende elektrische MaschinenTeil 9: Geruschgrenzwerte(IEC 60034-9:1997)This European Standard was approved by CENELEC on 1997-07-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions.CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.CENELECEuropean Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische NormungCentral Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide forCENELEC members.-,-,-Ref. No. EN 60034-9:1997 EEN 60034-9:1997ForewordThe text of document 2/979/FDIS, future edition 3 of IEC 60034-9, prepared by IEC TC 2, Rotating machinery, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60034-9 on 1997-07-01.This European Standard supersedesEN 60034-9:1993 and its amendment A1:1995.The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or byendorsement(dop) 1998-05-01 latest date by which the national standardshave to be withdrawn(dow) 1998-05-01For products which have complied withEN 60034-9:1993 and its amendment A1:1995 before 1998-05-01, as shown by the manufacturer orby a certification body, this previous standard maycontinue to apply for production until 2003-05-01.Annexes designated “normative” are part of the body of the standard.In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement noticeThe text of the International StandardIEC 60034-9:1997 was approved by CENELEC as a2European Standard without any modification.ContentsPageForeword2Introduction31Scope and object32Normative references33Terms and definitions 44Test nomenclature45Test conditions45.1Machine mounting45.2Test operating conditions46Sound power level limits57Declaration and verification ofnoise emission values7Annex ZA (normative) Normativewith their corresponding Europeanpublications8Table 1 Maximum A-weighted sound power level, LWA in dB, at no-load (excluding motors according to Table 2) (Method of cooling, IC code, see IEC 60034-6) (Degree ofprotection, IP code, see IEC 60034-5)6Table 2 Maximum A-weighted sound power level, LWA in dB at no-load (for single-speed three-phase cage induction motors IC01, IC11, IC21,IC411, IC511 and IC611) 7Table 3 Incremental expected increase, over no-load condition, in A-weighted sound power levels, %LWA in dB, (forrated load condition for motorsaccording to Table 2)7-,-,- BSI 04-1999EN 60034-9:1997IntroductionThe main changes in this edition relate to the possibility of making measurements under rated load condition and the addition of a table providing typical increases when asynchronous motors are fully loaded. The addition of reference standards for methods of measurement and mounting provisions eliminates the need for a separate test code(ISO 16801).Acoustic quantities can be expressed in sound pressure terms or sound power terms. The use of a sound power level, which can be specified independently of the measurement surface and environmental conditions, avoids the complications associated with sound pressure levels, which require additional data to be specified. Sound power levels provide a measure of radiated energy and have advantages in acoustic analysis and design.1 Scope and objectThis part of IEC 60034 specifies maximum A-weighted sound power levels for factory acceptance testing of rotating electrical machines in accordance with IEC 60034-1, having methods of cooling according to IEC 60034-6 and degrees of protection according to IEC 60034-5, and having the following characteristics: standard design, either a.c. or d.c., without additional special electrical, mechanical, or acoustical modifications intended to reduce the noise level; rated output from 1 kW (or kVA) up to and including 5 500 kW (or kVA); speed not greater than 3 750 min1.Excluded are a.c. motors supplied by convertors. For these conditions see IEC 60034-17 for guidance.NOTE 1 This standard recognizes the economic reason for the availability of standard noise-level machines for use innon-critical areas or for use with supplementary means of noise attenuation.NOTE 2 Where noise levels lower than those specifiedin Table 1 or Table 2 are required, these should be agreed between the manufacturer and the purchaser, as special electrical, mechanical, or acoustical design may involve additional cost.The object of this standard is to determine maximum A-weighted sound power levels, LWA in decibels, dB, for airborne noise emitted by rotating electrical machines of standard design, as a function of power, speed and load, and to specify the methodof the test conditions appropriatefor the determination of the sound power level of the machines to provide a standardized evaluation of machine noise up to the maximum specified sound power levels. This standard does not provide correction for the existence of tonal characteristics.Sound pressure levels at a distance from the machine may be required in some applications, such as hearing protection programs. However, this standard is only concerned with the physical aspect of noise, to express limits in terms of sound power. In situ sound pressure calculations require knowledge of machine size, operating conditions and the environment in which the machine is to be installed. Information for such calculations taking into account environmental factors can be found, if needed, in classical textbooks on acoustics.2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 60034. At the time of publication, the editions indicated were valid. All normative documents are subject to revision and parties to agreements based on this part of IEC 60034 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.IEC 60034-1:1996, Rotating electrical machines Part 1: Rating and performance.IEC 60034-5:1991, Rotating electrical machines Part 5: Classification of degrees of protection provided by enclosures of rotating electrical machines (IP code).IEC 60034-6:1991, Rotating electrical machines Part 6: Methods of cooling (IC Code).IEC 60034-17:1992, Rotating electrical machines Part 17: Guide for the application of cage induction motors when fed from convertors.ISO 3741:1988, Acoustics Determination of sound power levels of noise sources using sound pressure Precision methods for reverberation rooms.1) ISO 1680: Acoustics Test code for the measurement of airborne noise emitted by rotating electrical machinery.-,-,- BSI 04-19993EN 60034-9:1997ISO 3743-1:1994, Acoustics Determination of sound power levels of noise sources Engineering methods for small, movable sources in reverberant fields Part 1: Comparison method for hard-walled test rooms.ISO 3743-2:1994, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering methods for small, movable sources in reverberant fields Part 2: Method for special reverberation test rooms.ISO 3744:1994, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering method in an essentially free field over a reflecting plane.ISO 3745:1977, Acoustics Determination of sound power levels of noise sources Precision methods for anechoic and semi-anechoic rooms.ISO 3746:1995, Acoustics Determination of sound power levels of noise sources using sound pressure Survey method using an enveloping measurement surface over a reflecting plane.ISO 3747:1987, Acoustics Determination of sound power levels of noise sources Survey method using a reference sound source.ISO 9614-1:1993, Acoustics Determination of sound power levels of noise sources using sound intensity Part 1: Measurement at discrete points.ISO 9614-2:1996, Acoustics Determination of sound power levels of noise sources using sound intensity Part 2: Measurement by scanning.3 Terms and definitions-,-,-The terms and definitions used in this part ofIEC 60034 are those used in the standards listed in the normative references.4 Methods of measurement4.1 Sound level measurements and calculation of sound power level produced by the machine shall be made in accordance with ISO 3744, unless one of the conditions specified in or 4.4 applies.4.2 The maximum sound power levels specifiedin Table 1 and Table 2 or adjusted by Table 3, relate to measurements made in accordance with 4.1.4.3 When appropriate, one of the methods of precision or engineering grade accuracy, such as the methods of ISO 3741, ISO 3743-1, ISO 3743-2,ISO 3745, ISO 9614-1 or ISO 9614-2, may be used to determine sound power levels.44.4 The simpler but less accurate method specified in ISO 3746 or ISO 3747 may be used, especially when the environmental conditions required by ISO 3744 cannot be satisfied (e.g., for large machines).However, to prove compliance with this standard, unless a correction due to inaccuracy of the measurement has already been applied to the values determined by this method in accordance with ISO 3746 or ISO 3747, the levels of Table 1 and Table 2 shall be decreased by 2 dB.4.5 If testing under rated load conditions, the methods of ISO 9614 are preferred. However, other methods are allowed when the load machine and auxiliary equipment are acoustically isolated or located outside the test environment.5 Test conditions Machine mounting PrecautionsCare should be taken to minimize the transmission and the radiation of structure-borne noise from all mounting elements including the foundation. This can be achieved by the resilient mounting of smaller machines, however, larger machines can usually only be tested under rigid mounting conditions. If practicable, when testing, the machine should be orientated as it would be in normal use.Machines tested under load conditions shall be rigidly mounted. Resilient mountingThe natural frequency of the support system and the machine under test shall be lower than a quarter of the frequency corresponding to the lowest rotational speed of the machine. The effective mass of the resilient support shall be not greater than one-tenth of that of the machine under test. Rigid mountingThe machines shall be rigidly mounted to a surface with dimensions adequate for the machine type (for example by foot or flange fixed in accordance with the manufacturers instructions). The machine shall not be subject to additional mounting stresses from incorrect shimming or fasteners. Test operating conditionsThe following test conditions shall apply:a) The machine shall operate at rated voltage(s), rated frequency or rated speed(s) and with appropriate field current(s) (when applicable). These shall be measured with instruments of an accuracy of not less than 1,0 %.1) The standard load condition shall be no-load, except for series d.c. motors.2) When required by agreement, the machine may be operated at a load condition.b) A machine designed to operate with a vertical axis shall be tested with a vertical axis. BSI 04-1999c) For an a.c. motor, the waveform and the degree of unbalance of the supply system shall comply with the requirements of of IEC 60034-1. Power supplied from convertors is not permitted (refer to IEC 60034-17).NOTE Any increase of voltage (and current) waveform distortion and unbalance will result in an increase in noise and vibration.d) A synchronous motor shall be run with appropriate excitation to obtain unity power factor.e) A . machine suitable for variable speed shall be evaluated over the whole range of operating speeds.-,-,-f) A generator may be run as a motor, or may be driven at rated speed with appropriate excitation to obtain the rated voltage on open circuit when operation as a motor is not possible.g) A machine designed to operate at two or more distinct speeds shall be tested at each speed.h) A motor intended to be reversible shall be operated in both directions, unless no difference in sound power level is expected, and tested in the noisier direction. A unidirectional motor shall be tested in its design direction.6 Sound power level limitsWhere a machine is tested under the conditions specified in clause 5, the sound power level of the machine shall not exceed the relevant value(s) specified as follows:a) A machine, other than those specified in b), operating at no-load shall be as specifiedin Table 1.b) A single-speed three-phase cage induction motor with cooling classification IC01, IC11, IC21, IC411, IC511 or IC611, at 50 Hz or 60 Hz, and with rated output not less than 1,0 kW and not exceeding 400 kW;1) operating at no-load shall be as specified in Table 2.2) operating at rated load shall be the sum of the values specified in Table 2 and Table 3.NOTE 1 The limits of Table 1 and Table 2 recognize class 2 accuracy grade levels of measurement uncertainty and production variations.NOTE 2 Sound power levels, under load conditions, are normally higher than those at no-load. Generally, if ventilation noise is predominant the change may be small; but if the electromagnetic noise is predominant the change may be significant.NOTE 3 The limits are irrespective of the direction of rotation. A machine with a unidirectional ventilator is generally less noisy than one with a bi-directional ventilator. This effect is more significant for high speed machines, which may be designed for unidirectional operation only.NOTE 4 For . machines the limits in Table 1 may not apply for speeds below nominal speed. In such a case, or where the relationship between noise level and load is important, limits should be agreed between the manufacturer and the purchaser. NOTE 5 For multispeed machines the values in Table 1 apply. BSI 04-19995EN 60034-9:1997 BSI 04-19996Table 1 Maximum A-weighted sound power level, LWA in dB, at no-load (excluding motors according to Table 2)(Method of cooling, IC code, see IEC 60034-6)(Degree of protection, IP code, see IEC 60034-5)Rated speed nNmin1nN # 960960 nN # 1 3201 320 nN # 1 9001 900 nN # 2 3602 360 nN # 3 1503 150 nN # 3 750Methods of cooling(simplified code)IC01IC11IC21Note 1IC411IC511IC611Note 2IC31IC71W IC81W
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