DIN EN 62053-11:2003
电量测量设备(交流电).特殊要求.第11部分:机电电度表(0.5、1和2级)
Electricity metering equipment (a.c.) - Particular requirements - Part 11: Electromechanical meters for active energy (classes 0,5, 1 and 2) (IEC 62053-11:2003); German version EN 62053-11:2003