S閏urit?des transformateurs, blocs d碼limentation et analogues Partie 2-2: R鑗les particuli鑢es pour les transformateurs de commande premi鑢e 閐ition; CIE/IEC 61558-2-2:1997
Safety of power transformers, power supply units and similar Part 2-2: Particular requirements for control transformers first edition; CEI/IEC 61558-2-2:1997