Introduction This corrigendum corrects technical and other non-editorial errors printed in the text of the IEEE Std C37.09-1999@ second printing 19 December 2005. It is recalled that IEEE Std C37.09a?-2005@ IEEE Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis?? Amendment 1: Capacitance Current Switching@ which was printed and published on 16 September 2005@ amends IEEE Std C37.09-1999.