IEC 62052-11 [documento eletrónico] : electricity metering equipment (a.c.) – general requirements, tests and test conditions – Part 11; : metering equipment / International Electrotechnical Commission
IEC 62052-21 [documento eletrónico] : electricity metering equipment (a.c.) – general requirements, tests and test conditions – Part 21; : tariff and load control equipment / International Electrotechnical Commission