IEC 60034-9:2007
Measurement of airborne noise emitted by rotating electrical machines and the noise limits -Part 3:Noise limits

Standard No.

IEC 60034-9:2007

Release Date

2007

Published By

International Electrotechnical Commission (IEC)

Status

Be replaced 2007-07

Replace By

IEC 60034-9:2003/AMD1:2007

Latest

IEC 60034-9:2021 CMV

Scope

This part: Specifies test methods for the determination of sound power levels of rotating electrical machines. For rotating electrical machines that comply with GB 755, the cooling method specified in GB/T 1993--1993, and the protection classification specified in GB/T 4942.1-2006 and have the following characteristics, factory acceptance test method A under power grid power supply is specified. Maximum weighted sound power level: ·Both AC motors and DC motors are standard designs; except for designs that are specially modified to reduce the sound power level from electrical, mechanical or acoustic aspects; ·Rated output from 1 kW (kVA) to 5 500 kW (kVA); ·The rotation speed does not exceed 3 750 r/min. Guidelines are provided for determining the noise levels of cage induction motors powered by frequency converters. The purpose of this part is to specify the maximum sound power level L, in dB(A), of the airborne noise emitted by the motor characterized by power, speed, and load for standard designed motors; and to specify the test method for determining the sound power level of the motor. and test conditions, providing assessment standards for whether the motor noise reaches the specified maximum sound power level. This section does not provide correction for the presence of pure tone characteristics. In some practical situations, such as hearing protection, a sound pressure level at a certain distance from the motor is required. This data is derived from Article 7 according to the standard test environment. Note 1: This section considers that taking into account economic factors, standard noise level motors can be used in non-critical situations or when additional measures are required to reduce motor noise. Note 2: When sound power levels lower than those required in Tables 1 and 2 are required, the manufacturer and purchaser must agree that some additional measurements may be included due to special electrical, mechanical or acoustic design considerations.

IEC 60034-9:2007 Referenced Document

• GB 755-2008 Rotating electrical machines.Rating and performance
• GB/T 16538-1996 Acoustics--Determination of sound power levels of noise sources using sound pressure--Survey method using a reference sound source
• GB/T 1993-1993 Cooling methods for rotating electrical machines
• GB/T 20161-2006 Cage induction motors when fed from converters application guide
• GB/T 3768-1996 Acoustics--Determination of sound power levels of noise sources using sound pressure--Survey method using an enveloping measurement surface over a reflecting plane
• GB/T 4942.1-2006 Degrees of protection provided by the integral design of rotating electrical machined (IP code) - Classification
• GB/T 6881.1-2002 Acoustics--Determination of sound power levels of noise sources using sound pressure--Precision methods for reverberation rooms
• GB/T 6881.2-2002 Acoustics--Determination of sound power levels of noise soures--Engineering methods for small,movable sources in reverberant field--Part 1: Comparsion method for hard-walled test rooms
• GB/T 6881.3-2002 Acoustics--Determination of sound power levels of noise sources-using sound pressure--Engineering metheds for small,movable sources in reverberant fields--Part 2: Methods for special reverberation test rooms
• GB/T 6882-1986 Acoustics--Determination of sound power levels of noise sources--Precision methods for anechoic and semi-anechoic rooms
• ISO 3744 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Engineering methods for an essentially free field over a reflecting plane
• ISO 4871 Acoustics - Declaration and verification of noise emission values of machinery and equipment

IEC 60034-9:2007 history

• 0000 IEC 60034-9:2021 CMV
• 2007 IEC 60034-9:2003/AMD1:2007 Rotating electrical machines - Part 9: Noise limits; Amendment 1
• 2007 IEC 60034-9:2007 Measurement of airborne noise emitted by rotating electrical machines and the noise limits -Part 3:Noise limits
• 2003 IEC 60034-9:2003 Rotating electrical machines - Part 9: Noise limits
• 1997 IEC 60034-9:1997 Measurement of airbore noise emitted by ratating electrical machines and the noise limits-Part 3: Noise limits
• 1970 IEC 60034-9:1990/AMD1:1995 Amendment 1 - Rotating electrical machines. Part 9: Noise limits.
• 1970 IEC 60034-9:1990/COR1:1991 Corrigendum 1 - Rotating electrical machines. Part 9: Noise limits
• 1990 IEC 60034-9:1990 Rotating electrical machines; part 9: noise limits
• 1970 IEC 60034-9:1972/COR1:1972 Corrigendum 1 - Rotating electrical machines - Part 9: Noise limits
• 1970 IEC 60034-9:1972 Rotating electrical machines - Part 9: Noise limits