IEC 60243-3 pdf download Electrical strength of insulating materials — Test methods — Part 3: Additional requirements for 1,2/50 ? ?s impulse tests Scope This part of IEC 60243 gives requirements additional to those in lEC 60243-1 for thedetermination of the electric strength of solid insulating materials under 1,2/50 us impulsevoltage stress. 2 Normative references The following normative documents contain...