IEC 62054-21:2004 specifies 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.
This bilingual version (2016-12) corresponds to the monolingual English version, published in 2004-05.
ABANDON
IEC 62054-21/FRAGF ED1
30.97
End of interruption of work - split/merged
Dec 15, 2016
