NF C44-052-21*NF EN 62052-21:2006 Electricity metering equipment (a.c.) - General requirements, tests and test conditions - Part 21 : tariff and load control equipment
2006NF C44-052-21*NF EN 62052-21:2006 Electricity metering equipment (a.c.) - General requirements, tests and test conditions - Part 21 : tariff and load control equipment