1. IEC 60071-1 2006 Insulation co-ordination - Part 1: Definitions, principles and rules, Ed. 8.0
2. CIGRE Working Group A3.12 2007 Changing Network Conditions and System Requirements, Part II: The impact of long distance transmission on HV equipment. CIGRE Technical Brochure 336
3. IEC 60060-1 2010 High-voltage test techniques - Part 1: General definitions and test requirements, Ed. 3.0
4. CIGRE Working Group C4.407 2013 Lightning parameters for engineering applications. CIGRE Technical Brochure 549
5. IEC 62271-1 2007 High-voltage switchgear and controlgear - Part 1: Common specifications, Ed. 1.0