IEC-60050-447 Complete Document History
International Electrotechnical Vocabulary (IEV) - Part 447: Measuring relays and protection equipment

Complete Current Edition:
   EDITION 2.0 - Part 447: Measuring relays and protection equipment - May 1, 2020

Obsolete Revision Information:
   EDITION 1.0 - Part 447: Measuring relays - June 1, 2010