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This paper presents the analysis of the equivalent 10-Hz voltage flicker measurement ( V 10 ) based on the IEC flickermeter standard. The V 10 method has been employed to evaluate voltage flicker for more than two decades in several Asian countries and not been updated since 1978. Therefore, a careful inspection from various aspects was made against the V 10 method. The results uncover the deficiencies in the reliability of the V 10 method for voltage flicker measurement.Index Terms-Voltage flicker, IEC flickermeter.