KS C IEC 62052-21-2022 Electricity metering equipment (a.c.) ― General requirements, tests and test conditions ― Part 21: Tariff and load control equipment
2022KS C IEC 62052-21-2022 Electricity metering equipment (a.c.) ― General requirements, tests and test conditions ― Part 21: Tariff and load control equipment
2017KS C IEC 62052-21:2017 Electricity metering equipment (a.c.) ― General requirements, tests and test conditions ― Part 21: Tariff and load control equipment