Historical
IEC 61558-2-2 Ed. 1.0 b:1997
Safety of power transformers, power supply units and similar - Part 2-2: Particular requirements for control transformer
This part of IEC 61558 applies to stationary or portable, single-phase or poly-phases, air-cooled control transformers associated or otherwise. It has the status of a group safety publication in accordance with IEC Guide 104. This part 2-2 supplements or modifies the corresponding clauses in IEC 61558-1. This standard replaces chapter II, section 1 of IEC 60989.
International Electrotechnical Commission [iec]