IEC 62501:2009/AMD1:2014-Amendment 1-Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC) power transmission-Electrical testing, IEC 62061:2005/AMD2:2015-Amendment 2-Safety of machinery-Functional safety of safety-related electrical, IEC 60544-5:2011-Electrical insulating materials-Determination of the effects of ionizing r