NEN EN IEC 62054-21 : 2004 AMD 1 2017
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The latest, up-to-date edition.
ELECTRICITY METERING EQUIPMENT (A.C.) - TARIFF AND LOAD CONTROL - PART 21: PARTICULAR REQUIREMENTS FOR TIME SWITCHES
12-01-2013
Defines particular requirements for the type test of newly manufactured indoor time switches with operation reserve that are used to control electrical loads, multi-tariff registers and maximum demand devices of electricity metering equipment.
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