A new edition of IEC 62501 has been published by the International Electrotechnical Commission. IEC 62501 ed1.1 Consol. with am1 applies to “Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC) power transmission – Electrical testing.” The new edition is available for purchase on the IEC website.
“IEC 62501:2009+A1:2014 applies to self-commutated converter valves, for use in a three-phase bridge voltage sourced converter (VSC) for high voltage d.c. power transmission or as part of a back-to-back link. It is restricted to electrical type and production tests.”
*Description from IEC website