1. IEC 60099-1: surge arresters. Part 1. Non-linear resistor type gapped surge arresters for ac systems.
2. IEC 60099-5: surge arresters. Part 5. Selection and application recommendations.
3. IEC 60099-4: surge arresters. Part 4. Metal-oxide surge arresters without gaps for ac systems.
4. IEC 60071-1: insulation co-ordination. Part 1. Definitions, principles and rules.
5. IEC 60071-2: insulation co-ordination. Part 2. Application guide.