IEC 62052-21:2004 specifies general requirements for the type test of newly manufactured indoor tariff and load control equipment, like electronic ripple control receivers and time switches that are used to control electrical loads, multi-tariff registers and maximum demand indicator devices. This bilingual version (2016-07) corresponds to monolingual version published in 2004-05.
IEC 62052-21 Ed. 1.0 b:2004 History
IEC 62052-21 Ed. 1.1 b:2016
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IEC 62052-21 Ed. 1.0 b:2004
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