The International Electrotechnical Commission (IEC) has released the second edition of IEC 60076-10:2016. This standard applies to “Power transformers – Part 10: Determination of sound levels.” At the same time, IEC has also published IEC 60076-10-1:2016, which includes supporting information to help both manufacturers and purchasers to apply the measurement techniques described in IEC 60076-10. The new editions include dozens of significant technical changes to the previous edition.
Descriptions from the IEC website:
IEC 60076-10:2016 defines sound pressure and sound intensity measurement methods from which sound power levels of transformers, reactors and their associated cooling devices are determined. The methods are applicable to transformers, reactors and their cooling devices – either fitted to or separate from the transformer – as covered by the IEC 60076 and IEC 61378 series. This standard is primarily intended to apply to measurements made at the factory. Conditions on-site can be very different because of the proximity of objects, including other transformers. Nevertheless, this standard is applied to the extent possible for on site measurements.
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: