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GB/T 10069.3-2024: Measurement of airborne noise emitted by rotating electrical machines and the noise limits - Part 3: Noise limits
GB/T 10069.3-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.160
CCS K 20
GB/T 10069.3-2024 / IEC 60034-9:2021
Replacing GB/T 10069.3-2008
Measurement of airborne noise emitted by rotating electrical
machines and the noise limits - Part 3: Noise limits
(IEC 60034-9:2021, Rotating electrical machines - Part 9: Noise limits, IDT)
ISSUED ON: AUGUST 23, 2024
IMPLEMENTED ON: MARCH 01, 2025
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative references ... 7
3 Terms and definitions ... 9
4 Test methods ... 10
5 Test conditions ... 10
6 Sound power level limits ... 12
7 Determination of sound pressure level ... 13
8 Indication and confirmation of sound power values ... 13
Table 1 -- Maximum no-load A-weighted sound power level LWA (except for motors specified
in Table 2 and Table 3) (Cooling method, IC code, according to IEC 60034-6: Protection degree,
IP code, according to IEC 60034-5) ... 15
Table 2 -- Maximum no-load A-weighted sound power level LWA, 50 Hz, sinusoidal supply
(single-speed three-phase cage induction motor) ... 17
Table 3 -- Maximum no-load A-weighted sound power level LWA, 60 Hz, sinusoidal supply
(single-speed three-phase cage induction motor) ... 18
Table 4 -- Permissible increase in the A-weighted sound power level at rated load over no-load
condition ΔLWA (for motors in Tables 2 and 3) ... 19
Annex A (informative) Typical values of the measurement surface index ... 20
Table A.1 -- Typical values of the measurement surface index based on the conversion of sound
power level to sound pressure level using a parallelepiped measuring surface according to ISO
3744 ... 21
Annex B (informative) Information on typical noise increase when powered by a
frequency converter ... 22
Figure B.1 -- 6-pulse square wave current source inverter output current spectrum f1 = 50 Hz
... 23
Figure B.2 -- Class A voltage source inverter port voltage spectrum (characterized by obvious
peak values close to the inverter switching frequency and its multiples) f1 = 50 Hz, fS = 3 kHz
... 23
Figure B.3 -- Voltage spectrum of Class B voltage source inverter (characterized by a wide
spectrum of harmonic voltages and no obvious peaks) f1 = 50 Hz, fS average = 4.5 kHz ... 24
Table B.1 -- Resonant frequency in vibration mode r ... 25
Table B.2 -- A-weighted noise increment ... 25
Bibliography ... 26
Foreword
This document was drafted in accordance with the rules given in GB/T 1.1-2020
"Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents".
This document is part 3 of GB/T 10069 "Measurement of airborne noise emitted by
rotating electrical machines and the noise limits". The following parts of GB/T 10069
has been published:
- Part 1: Method for the measurement of airborne noise emitted by rotating electrical
machines;
- Part 3: Noise limits.
This document replaces GB/T 10069.3-2008 "Measurement of airborne noise emitted
by rotating electrical machines and the noise limits - Part 3: Noise limits". Compared
with GB/T 10069.3-2008, in addition to structural adjustments and editorial changes,
the main technical changes are as follows:
- Added the no-load maximum A-weighted sound power level LWA of 50 Hz single-
speed three-phase cage motors with cooling methods IC01, IC11, IC21, IC31,
IC71, and IC81 (see Chapter 6, Table 2 of this Edition);
- Added the maximum no-load A-weighted sound power level LWA of 60 Hz single-
speed three-phase cage motor and divided into two levels: A and B (see Chapter
6, Table 3 of this Edition);
- Adjusted the chapter "Determination of noise increment when powered by inverter"
and its content from the main text to informative Annex B (see Annex B of this
Edition; Chapter 7 of Edition 2008).
This document is equivalent to IEC 60034-9:2021 "Rotating electrical machines - Part
9: Noise limits".
The following minimal editorial changes were made to this document:
- To coordinate with the existing standards, the name of the standard is changed to
"Measurement of airborne noise emitted by rotating electrical machines and the noise
limits - Part 3: Noise limits".
Attention is drawn to the possibility that some of the elements of this document may be
the subject of patent rights. The issuing authority shall not be held responsible for
identifying any or all such patent rights.
This document was proposed by China Electrical Equipment Industry Association.
Measurement of airborne noise emitted by rotating electrical
machines and the noise limits - Part 3: Noise limits
1 Scope
This document
- describes the test method for determining the sound power level of rotating
electrical machines;
- For rotating electrical machines that comply with IEC 60034-1, the cooling method
specified in IEC 60034-6, the protection level specified in IEC 60034-5 and have
the following characteristics, the maximum value of the A-weighted sound power
level under the factory acceptance test method when powered by the power grid
is specified:
● Both AC and DC motors are of standard design, except for designs that are
specially improved from electrical, mechanical, or acoustic aspects to reduce
the sound power level;
● Rated output from 1 kW(kVA) to 5500 kW(kVA);
● Speed does not exceed 3750 r/min.
The exception is noise generated by AC motors powered by frequency converters. For
these cases, guidance is given in Annex B.
The purpose of this document is to specify the maximum sound power level LWA of
airborne noise emitted by motors characterized by power, speed, and load for standard
design motors, in dB(A). This document describes the test method and test conditions
for determining the sound power level of motors. This document provides the
assessment criteria for whether the motor noise reaches the specified maximum sound
power level. This document does not provide corrections for the existence of pure tone
characteristics.
Some practical situations, such as hearing protection, may require the sound pressure
level at a certain distance from the motor. This data is obtained from Chapter 7
according to the standard test environment.
NOTE 1: This document recognizes the availability of standard noise level motors in non-critical
applications or when used in conjunction with noise reduction aids, where economic factors are
taken into account.
4 Test methods
4.1 The measurement of the sound pressure level and calculation of the sound power
level generated by the motor shall be carried out in accordance with ISO 3744 if neither
4.3 nor 4.4 below is used.
NOTE: For all axis center heights, the general practice is to use the parallelepiped method.
4.2 For the relevant results obtained by testing in accordance with 4.1, the maximum
sound power level is given in Tables 1, 2 and 3 or adjusted in accordance with the
provisions of Table 4.
4.3 When appropriate, one of the precision or engineering grade accuracy methods such
as ISO 3741, ISO 3743-1, ISO 3743-2, ISO 3745, ISO 9614-1, or ISO 9614-2 may be
used to determine the sound power level.
4.4 A simpler but less accurate method may be the one specified in ISO 3746 or ISO
3747, particularly when environmental conditions do not meet the requirements of ISO
3744 (e.g., large motors).
However, in order to demonstrate compliance with the requirements of this document,
the sound level values in Tables 1, 2 and 3 shall be reduced by 2 dB unless appropriate
corrections have been made for the errors of the values measured in accordance with
ISO 3746 or ISO 3747.
4.5 If the test is conducted under rated load conditions, the specified method shall be
used first. Of course, other methods may be used when the load motor and attached
devices are soundproofed or the load is placed outside the test environment.
5 Test conditions
5.1 Motor installation
5.1.1 Preparation
Care shall be taken to minimize the radiation and transmission of structure-borne noise
from all mounting components, including the foundation. Smaller motors can be
resiliently mounted. Large motors can usually only be tested under rigid mounting
conditions.
The motor under test shall be rigidly mounted under load.
5.1.2 Flexible Installation
The natural frequency of the system consisting of the supporting device and the motor
under test shall be lower than 1/3 of the corresponding frequency of the motor's lowest
GB/T 10069.3-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.160
CCS K 20
GB/T 10069.3-2024 / IEC 60034-9:2021
Replacing GB/T 10069.3-2008
Measurement of airborne noise emitted by rotating electrical
machines and the noise limits - Part 3: Noise limits
(IEC 60034-9:2021, Rotating electrical machines - Part 9: Noise limits, IDT)
ISSUED ON: AUGUST 23, 2024
IMPLEMENTED ON: MARCH 01, 2025
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative references ... 7
3 Terms and definitions ... 9
4 Test methods ... 10
5 Test conditions ... 10
6 Sound power level limits ... 12
7 Determination of sound pressure level ... 13
8 Indication and confirmation of sound power values ... 13
Table 1 -- Maximum no-load A-weighted sound power level LWA (except for motors specified
in Table 2 and Table 3) (Cooling method, IC code, according to IEC 60034-6: Protection degree,
IP code, according to IEC 60034-5) ... 15
Table 2 -- Maximum no-load A-weighted sound power level LWA, 50 Hz, sinusoidal supply
(single-speed three-phase cage induction motor) ... 17
Table 3 -- Maximum no-load A-weighted sound power level LWA, 60 Hz, sinusoidal supply
(single-speed three-phase cage induction motor) ... 18
Table 4 -- Permissible increase in the A-weighted sound power level at rated load over no-load
condition ΔLWA (for motors in Tables 2 and 3) ... 19
Annex A (informative) Typical values of the measurement surface index ... 20
Table A.1 -- Typical values of the measurement surface index based on the conversion of sound
power level to sound pressure level using a parallelepiped measuring surface according to ISO
3744 ... 21
Annex B (informative) Information on typical noise increase when powered by a
frequency converter ... 22
Figure B.1 -- 6-pulse square wave current source inverter output current spectrum f1 = 50 Hz
... 23
Figure B.2 -- Class A voltage source inverter port voltage spectrum (characterized by obvious
peak values close to the inverter switching frequency and its multiples) f1 = 50 Hz, fS = 3 kHz
... 23
Figure B.3 -- Voltage spectrum of Class B voltage source inverter (characterized by a wide
spectrum of harmonic voltages and no obvious peaks) f1 = 50 Hz, fS average = 4.5 kHz ... 24
Table B.1 -- Resonant frequency in vibration mode r ... 25
Table B.2 -- A-weighted noise increment ... 25
Bibliography ... 26
Foreword
This document was drafted in accordance with the rules given in GB/T 1.1-2020
"Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents".
This document is part 3 of GB/T 10069 "Measurement of airborne noise emitted by
rotating electrical machines and the noise limits". The following parts of GB/T 10069
has been published:
- Part 1: Method for the measurement of airborne noise emitted by rotating electrical
machines;
- Part 3: Noise limits.
This document replaces GB/T 10069.3-2008 "Measurement of airborne noise emitted
by rotating electrical machines and the noise limits - Part 3: Noise limits". Compared
with GB/T 10069.3-2008, in addition to structural adjustments and editorial changes,
the main technical changes are as follows:
- Added the no-load maximum A-weighted sound power level LWA of 50 Hz single-
speed three-phase cage motors with cooling methods IC01, IC11, IC21, IC31,
IC71, and IC81 (see Chapter 6, Table 2 of this Edition);
- Added the maximum no-load A-weighted sound power level LWA of 60 Hz single-
speed three-phase cage motor and divided into two levels: A and B (see Chapter
6, Table 3 of this Edition);
- Adjusted the chapter "Determination of noise increment when powered by inverter"
and its content from the main text to informative Annex B (see Annex B of this
Edition; Chapter 7 of Edition 2008).
This document is equivalent to IEC 60034-9:2021 "Rotating electrical machines - Part
9: Noise limits".
The following minimal editorial changes were made to this document:
- To coordinate with the existing standards, the name of the standard is changed to
"Measurement of airborne noise emitted by rotating electrical machines and the noise
limits - Part 3: Noise limits".
Attention is drawn to the possibility that some of the elements of this document may be
the subject of patent rights. The issuing authority shall not be held responsible for
identifying any or all such patent rights.
This document was proposed by China Electrical Equipment Industry Association.
Measurement of airborne noise emitted by rotating electrical
machines and the noise limits - Part 3: Noise limits
1 Scope
This document
- describes the test method for determining the sound power level of rotating
electrical machines;
- For rotating electrical machines that comply with IEC 60034-1, the cooling method
specified in IEC 60034-6, the protection level specified in IEC 60034-5 and have
the following characteristics, the maximum value of the A-weighted sound power
level under the factory acceptance test method when powered by the power grid
is specified:
● Both AC and DC motors are of standard design, except for designs that are
specially improved from electrical, mechanical, or acoustic aspects to reduce
the sound power level;
● Rated output from 1 kW(kVA) to 5500 kW(k...