This part 2 of IEC 61558 applies to stationary or portable,single-phase or polyphase, air-cooled safety isolatingtransformers, associated or otherwise.It has the status of a group safety publication in accordance withIEC Guide 104This part 2 supplements or modifies the corresponding clauses inIEC 61558-1, This Standard replaces Chapter III, Section 1 of IEC 60742.