旋转电机第9部分:噪声限值

[中文适用范围]： 本部分 IEC 60034： - 规定了旋转电机声功率级的测试方法； - 规定了工厂验收测试中网络供电旋转电机的最大A加权声功率级，这些电机符合IEC 60034-1，冷却方式符合IEC 60034-6，防护等级符合IEC 60034-5，并具有以下特性： - 标准设计，交流或直流，无额外的特殊电气、机械或声学修改以降低声功率级 - 额定输出从1 kW（或kVA）到5500 kW（或kVA） - 额定转速不超过3750 min^-1 不包括由变频器供电的交流电机的噪声限值。对于这些条件，参见附录B的指导。 本文档的目的是确定标准设计旋转电机空气噪声的最大A加权声功率级（LWA，单位为分贝dB），作为功率、速度和负载的函数，并规定测量方法和适当的测试条件，以提供对电机噪声的标准化评估，直至指定的最大声功率级。本文档不提供音调特性的校正。 在某些应用中，如听力保护计划，可能需要距离机器一定距离处的声压级。第7条提供了基于标准化测试环境的此类程序的信息。 注1：本文档承认标准噪声级机器在经济上的合理性，可用于非关键区域或与额外的噪声衰减手段一起使用。 注2：当需要低于表1、表2或表3中规定的声功率级时，这些由制造商和购买者商定，因为特殊的电气、机械或声学设计可能涉及额外的措施。 [外文原描述]： IEC 60034-9:2021 specifies test methods for the determination of sound power level of rotating electrical machines and specifies maximum A-weighted sound power levels for factory acceptance testing of network-supplied, rotating electrical machines in accordance with lEC 60034-1, having methods of cooling according to lEC 60034-6 and degrees of protection according to lEC 60034-5, and having the following characteristics: - standard design, either AC or DC, without additional special electrical, mechanical, or acoustical modifications intended to reduce the sound power level - rated output from 1 kW (or kVA) up to and including 5 500 kW (or kVA) - rated speed not greater than 3 750 min–1 This fifth edition cancels and replaces the fourth edition, published in 2003 and its amendment 1, published in 2007. This edition includes the following significant technical changes with respect to the previous edition: a) In Table 2 and Table 3 cooling methods IC01, IC11, IC21 and IC31, IC71, IC81 are now covered. b) This edition adds Table 3 for 60 Hz machines, whereas Table 2, which covers only 50 Hz machines, has no change in levels. c) In Table 3, grade A is added to harmonize the highest levels seen in IEC and NEMA, whereas grade B was added to harmonize the lowest, more restrictive levels seen in IEC and NEMA. d) The clause “Determination of noise increments caused by converter supply” has been shifted to Annex B and renamed “Information on typical noise increments caused by converter supply”.