电力变压器 - 第10-1部分:声级测定 - 应用指南

[中文适用范围]： IEC 60076 的这一部分提供了支持信息，以帮助制造商和购买者应用 IEC 60076-10 中描述的测量技术。除了介绍一些基本的声学知识外，还描述了变压器和电抗器声音的来源和特征。给出了进行测量的实用指导，并讨论了影响方法准确性的因素。本应用指南还说明了工厂测量值可能与使用中测量值不同的原因。本应用指南适用于变压器和电抗器及其相关冷却辅助设备。 [外文原描述]： IEC 60076-10-1:2016 provides supporting information to help both manufacturers and purchasers to apply the measurement techniques described in IEC 60076-10. Besides the introduction of some basic acoustics, the sources and characteristics of transformer and reactor sound are described. Practical guidance on making measurements is given, and factors influencing the accuracy of the methods are discussed. This application guide also indicates why values measured in the factory may differ from those measured in service. This application guide is applicable to transformers and reactors together with their associated cooling auxiliaries. This edition includes the following significant technical changes with respect to the previous edition: a) extended information on sound fields provided; b) effect of current harmonics in windings enfolded; c) updated information on measuring methods sound pressure and sound intensity given; d) supporting information on measuring procedures walk-around and point-by-point given; e) clarification of A-weighting provided; f) new information on frequency bands given; g) background information on measurement distance provided; h) new annex on sound-built up due to harmonic currents in windings introduced. This publication is to be read in conjunction with IEC 60076-10:2016 .