Abstract

This paper has been prepared by a task force of Working Group 04 of SC23 to outline the effect of different noise attenuation devices and methods on transformer noise levels in substations. In a short theoretical review supplementary corrections to the formula ( 5) of !EC 551, for calculation of the sound level at a distance from each source, have been introduced to take into account the installation conditions of the transformer (s) and cooling equipment ( s). Sound power levels of transformer and transformer coolers, as well as non nuisance criteria in several countries in comparison to ISO RI 996 are dealt with. The noise attenuation that can be obtained in substations with different devices and methods is proposed. Several examples of application are given to demonstrate that the calculated and measured sound levels correspond very well

Links and resources

Tags

community