SIST EN 60034-9:2006

Rotating electrical machines - Part 9: Noise limits (IEC 60034-9:2003, modified)

Specifies test methods for the determination of sound power level of rotating electrical machines. Provides maximum A-weighted sound power levels for factory acceptance testing of rotating electrical machines. To be used in conjunction with EN 60034-1, EN 60034-5 and EN 60034-6.

Drehende elektrische Maschinen - Teil 9: Geräuschgrenzwerte (IEC 60034-9:2003, modifiziert)

Machines électriques tournantes - Partie 9: Limites de bruit (CEI 60034-9:2003, modifiée)

Spécifie les méthodes d'essai pour la détermination du niveau de puissance acoustique des machines électriques tournantes. Fournit les niveaux maximaux de puissance acoustique pondérée A pour les essais de réception en usine des machines électriques tournantes. A utiliser conjointement avec les EN 60034-1, EN 60034-5 et EN 60034-6.

Električni rotacijski stroji - 9. del: Omejitve hrupa (IEC 60034-9:2003, spremenjen)

General Information

• Status: Published
• Publication Date: 31-Dec-2005
• ICS: 17.140.20 - Noise emitted by machines and equipment
• ICS: 29.160.01 - Rotating machinery in general
• Technical Committee: ERS - Rotating machinery
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2006
• Due Date: 01-Jan-2006
• Completion Date: 01-Jan-2006
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 73/23/EEC - Electrical equipment designed for use within certain voltage limits
• Ref Project: EN 60034-9:2005 - Rotating electrical machines - Part 9: Noise limits

Relations

• Replaces: SIST EN 60034-9:1999 - Rotating electrical machines -- Part 9: Noise limits
• Effective Date: 07-Jun-2022
• Official Journal Project Relation: SIST EN 60034-9:1999 - Rotating electrical machines -- Part 9: Noise limits
• Effective Date: 16-Mar-2010
• Amended By: SIST EN 60034-9:2006/A1:2007 - Rotating electrical machines - Part 9: Noise limits (IEC 60034-9:2003/A1:2007)
• Effective Date: 21-Sep-2010

Overview

EN 60034-9:2005 - Rotating electrical machines - Part 9: Noise limits specifies how to measure and declare the A-weighted sound power level of rotating electrical machines and sets maximum sound-power limits for factory acceptance testing. It applies to standard-design rotating machines (AC or DC) with rated output from 1 kW up to and including 5 500 kW and maximum speed ≤ 3 750 min‑1. The standard is intended to be used together with EN/IEC 60034-1, -5 and -6 and excludes AC motors supplied by converters (see IEC 60034-17).

Key topics and requirements

• Sound power measurement methods: Defines measurement procedures for determining sound power level (preferred recommendation: the parallelepiped method for enveloping measurement surfaces).
• A-weighted sound power limits: Provides maximum A-weighted sound power levels (Tables 1 & 2) for factory acceptance testing and guidance on expected increases at rated load (Table 3 for specific cage-induction motors).
• Test conditions:
  • Machines tested in their operating position.
  • For multi-speed or variable-speed designs, test at the speed generating the greatest noise.
  • Guidance on mounting (rigid vs. resilient) and necessary test precautions.
• Sound pressure level guidance: Sound pressure values are not mandatory; Clause 7 gives a method to derive A-weighted sound pressure levels from test readings or from sound power using a parallelepiped surface at 1 m (ISO 3744 reference).
• Declaration & verification: Procedures for declaring and verifying sound-power values for compliance and procurement.
• Informative guidance: Measurement surface selection, method for average sound pressure, and uncertainty indication based on test category.
• Limitations: No corrections for tonal characteristics are provided.

Practical applications

• Factory acceptance testing: Verify that motors meet the maximum noise limits specified by EN 60034-9:2005 prior to shipment.
• Procurement & specifications: Buyers and OEMs set contractual noise limits and compare offers on a standardized basis.
• Acoustic engineering & plant design: Use sound power data for noise mapping, enclosure design, and hearing-protection planning.
• Quality control & product development: Manufacturers use the standard to benchmark and reduce machine noise to standardized levels.

Who should use this standard

• Motor manufacturers and test laboratories
• OEMs, purchasers and procurement engineers
• Acoustic consultants and health & safety professionals
• Compliance officers responsible for CE/EN conformity of rotating machinery

Related standards

• EN/IEC 60034-1 (Rating & performance)
• EN/IEC 60034-5 (IP code)
• EN/IEC 60034-6 (Cooling / IC code)
• IEC 60034-17 (motors fed from converters) - for converter-driven machines
• ISO 3744 / ISO 3746 / ISO 3741 / ISO 4871 / ISO 9614 (acoustics test methods and declaration)

Keywords: EN 60034-9:2005, rotating electrical machines noise limits, sound power level, A-weighted, factory acceptance testing, noise measurement, ISO 3744, IEC 60034.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2006
1DGRPHãþD
SIST EN 60034-9:1999
(OHNWULþQLURWDFLMVNLVWURMLGHO2PHMLWYHKUXSD,(&VSUHPHQMHQ
Rotating electrical machines - Part 9: Noise limits (IEC 60034-9:2003, modified)
Drehende elektrische Maschinen - Teil 9: Geräuschgrenzwerte (IEC 60034-9:2003,
modifiziert)
Machines électriques tournantes - Partie 9: Limites de bruit (CEI 60034-9:2003,
modifiée)
Ta slovenski standard je istoveten z: EN 60034-9:2005
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60034-9
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2005
ICS 29.160 Supersedes EN 60034-9:1997

English version
Rotating electrical machines
Part 9: Noise limits
(IEC 60034-9:2003, modified)
Machines électriques tournantes Drehende elektrische Maschinen
Partie 9: Limites de bruit Teil 9: Geräuschgrenzwerte
(CEI 60034-9:2003, modifiée) (IEC 60034-9:2003, modifiziert)

This European Standard was approved by CENELEC on 2005-03-01. 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60034-9:2005 E
Foreword
The text of the International Standard IEC 60034-9:2003, prepared by IEC TC 2, Rotating machinery,
together with the common modifications prepared by the Technical Committee CENELEC TC 2,
Rotating machinery, was submitted to the formal vote and was approved by CENELEC as EN 60034-9
on 2005-03-01.
This European Standard supersedes EN 60034-9:1997.
It includes the following significant technical changes:
– it reduces the no-load noise limits for single-speed, cage-induction motors according to Table 2;
– it provides informative guidance on
– the measurement surface to be used during some tests,
– a method for the determination of an average sound pressure level,
– an indication of "uncertainty" based upon the category of test procedure.
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 by endorsement (dop) 2006-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-03-01
Annex ZA has been added by CENELEC.
__________
- 3 - EN 60034-9:2005
Endorsement notice
The text of the International Standard IEC 60034-9:2003 was approved by CENELEC as a European
Standard with agreed common modifications as given below.
COMMON MODIFICATIONS
4 Methods of measurement
4.1 Replace the note by:
NOTE  It is recommended that the parallelepiped method be used for all electrical machines.
5 Test conditions
5.2 Replace item b) by:
b) Machines shall be tested in their operating position and in case of designs for several
distinct speeds or for a speed range at that speed which generates the greatest noise.
Delete item f) and rename item g) to become item f).
7 Determination of sound pressure level
Replace the first paragraph by:
Sound pressure levels are not required as part of this standard. If requested, an A-weighted
sound pressure level may be determined from the test readings (see 4.1). Only if tested
sound pressure values are not available an A-weighted sound pressure level may be
determined from the sound power level as follows:
Replace the last paragraph by:
S is the area in m² of a parallelepiped surface enveloping the machine at a distance from
the machine of 1 m according to ISO 3744.
Delete the two columns headed "Shaft height" and "Surface area, S".

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60034-1 - Rotating electrical machines EN 60034-1 2004
Part 1: Rating and performance
1) 2)
IEC 60034-5 - Part 5: Degrees of protection provided EN 60034-5 2004
by the integral design of rotating
electrical machines (IP code) -
Classification
1) 2)
IEC 60034-6 - Part 6: Methods of cooling (IC Code) EN 60034-6 1993
1) 2)
IEC/TS 60034-17 - Part 17: Cage induction motors when fed CLC/TS 60034-17 2004
from converters - Application guide
1) 2)
ISO 3741 - Acoustics - Determination of sound EN ISO 3741 1999
power levels of noise sources using
sound pressure - Precision methods for
reverberation rooms
1) 2)
ISO 3743-1 - Acoustics - Determination of sound EN ISO 3743-1 1995
power levels of noise sources using
sound pressure - Engineering methods
for small, movable sources in
reverberant fields
Part 1: Comparison method for hard-
walled test rooms
1) 2)
ISO 3743-2 - Part 2: Methods for special reverberation EN ISO 3743-2 1996
test rooms
1) 2)
ISO 3744 - Acoustics - Determination of sound EN ISO 3744 1995
power levels of noise sources using
sound pressure - Engineering method in
an essentially free field over a reflecting
plane
1)
Undated reference.
2)
Valid edition at date of issue.

- 5 - EN 60034-9:2005
Publication Year Title EN/HD Year
1) 2)
ISO 3745 - Acoustics - Determination of sound EN ISO 3745 2003
power levels of noise sources -
Precision methods for anechoic and

semi-anechoic rooms
1) 2)
ISO 3746 - Acoustics - Determination of sound EN ISO 3746 1995
power levels of noise sources using
sound pressure - Survey method using
an enveloping measurement surface
over a reflecting plane
1) 2)
ISO 3747 - Acoustics - Determination of sound EN ISO 3747 2000
power levels of noise sources using
sound pressure - Comparison method in
situ
1) 2)
ISO 4871 - Acoustics - Declaration and verification EN ISO 4871 1996
of noise emission values of machinery
and equipment
1) 2)
ISO 9614-1 - Acoustics - Determination of sound EN ISO 9614-1 1995
power levels of noise sources using
sound intensity
Part 1: Measurement at discrete points
1) 2)
ISO 9614-2 - Part 2: Measurement by scanning EN ISO 9614-2 1996

NORME CEI
INTERNATIONALE IEC
60034-9
INTERNATIONAL
Quatrième édition
STANDARD
Fourth edition
2003-10
Machines électriques tournantes –
Partie 9:
Limites de bruit
Rotating electrical machines –
Part 9:
Noise limits
 IEC 2003 Droits de reproduction réservés  Copyright - all rights reserved
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utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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Telephone: [phone] Telefax: [phone] E-mail: [e-mail]  Web: www.iec.ch
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Pour prix, voir catalogue en vigueur
For price, see current catalogue

60034-9  IEC:2003 – 3 –
CONTENTS
FOREWORD . 5
INTRODUCTION .9
1 Scope .11
2 Normative references.13
3 Terms and definitions .15
4 Methods of measurement.15
5 Test conditions .17
5.1 Machine mounting .17
5.1.1 Precautions.17
5.1.2 Resilient mounting .17
5.1.3 Rigid mounting.17
5.2 Test operating conditions.17
6 Sound power level limits .19
7 Determination of sound pressure level .19
8 Declaration and verification of sound power values.21
Table 1 – Maximum A-weighted sound power level, L in dB, at no-load
WA
(excluding motors according to Table 2).23

Table 2 – Maximum A-weighted sound power level, L in dB, at no-load (for single
WA
speed three-phase cage induction motors IC01, IC11, IC21, IC411, IC511, IC611) .25
Table 3 – Maximum expected increase, over no-load condition, in A-weighted sound
power levels, ∆L in dB, for rated load condition (for motors according to Table 2).25
WA
60034-9  IEC:2003 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 9: Noise limits
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
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8) Attention is drawn to the Normative 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 responsible for identifying any or all such patent rights.
International Standard IEC 60034-9 has been prepared by IEC technical committee 2:
Rotating machinery.
This fourth edition cancels and replaces the third edition published in 1997. This edition
includes the following significant technical changes:
• this edition reduces the no-load noise limits for single-speed, cage-induction motors
according to Table 2;
• it also provides informative guidance on
– the measurement surface to be used during some tests,
– a method for the determination of an average sound pressure level,
– an indication of “uncertainty” based upon the category of test procedure.

60034-9  IEC:2003 – 7 –
The text of this standard is based on the following documents:
FDIS Report on voting
2/1256/FDIS 2/1272/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.
The committee has decided that the contents of this publication will remain unchanged until 2005.
At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
60034-9  IEC:2003 – 9 –
INTRODUCTION
Acoustic quantitie
...