IEC 62054-21:2004/AMD1:2017/COR1:2018 Corrigendum 1 - Amendment 1 - Electricity metering (A.C.) - Tariff and load control - Part 21: Particular requirements for time switches
2018IEC 62054-21:2004/AMD1:2017/COR1:2018 Corrigendum 1 - Amendment 1 - Electricity metering (A.C.) - Tariff and load control - Part 21: Particular requirements for time switches
2017IEC 62054-21:2004/AMD1:2017 Electricity metering (AC) - Tariff and load control - Part 21: Particular requirements for time switches
2017IEC 62054-21:2017 Electricity metering (AC) - Tariff and load control - Part 21: Particular requirements for time switches
2004IEC 62054-21:2004 Electricity metering (a.c.) - Tariff and load control - Part 21: Particular requirements for time switches