scope:

This part of IEC 60076 defines sound pressure and sound intensity measurement methods from which sound power levels of transformers, reactors and their associated cooling devices shall be determined. NOTE For the purpose of this standard, the term "transformer" frequently means "transformer or reactor". 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 may be very different because of the proximity of objects, including other transformers. Nevertheless, this standard shall be applied to the extent possible for on site measurements.