Lightning protection in a 24-kv station

THE RESULTS of synchronograph field tests and Anacom laboratory studies on a 24-kv multiline bus are presented. Previous studies on higher voltage stations indicated the influence of multiple lines on the surge voltage at the bus and the connected transformer. Extrapolation of that data to lower voltage systems seemed questionable, however, because of differences in the station circuit constants. This study has extended the station surge-performance d a t a down to the 24-kv level and, also, has provided additional verification of the miniature-system method by means of synchronograph field tests.