Electricity metering equipment (AC) - General requirements, tests and test conditions - Part 21: Tariff and load control equipment (IEC 62052-21:2004 + A1:2016); German version EN 62052-21:2004 + A1:2017
电能计量设备(AC).一般要求 试验和试验条件.第21部分:电价和负荷控制设备(IEC 62052-21-2004+A1-2016);德文版EN 62052-21:2004+A1:2017