IEC 60050-447:2010 defines terms specifically relevant to measuring relays. This first edition of IEC 60050-447, along with IEC 60050-444:2002 and IEC 60050-445:2002 cancels and replaces IEC 60050-446, published in 1983. It has the status of a horizontal standard in accordance with IEC Guide 108.
IEC 60050-447 Ed. 1.0 b:2010 History
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