The IEC 60060-1:2025 (Fourth Edition) standard establishes updated international procedures for high-voltage dielectric tests, including lightning and switching impulses for equipment above 1.0 kV AC or 1.5 kV DC. Key revisions introduced in 2025 include expanded tolerances for lightning impulses on high-voltage equipment and standardized procedures in Annex C for manual wave evaluation. The official, current publication is available at IEC Webstore . IEC 60060-1:2025 - Singapore Standards
If you manage to get a legitimate copy, here are the core sections you must study: i--- Iec 60060-1 Pdf
Yes. It is harmonized with CENELEC (EN 60060-1) and adopted by many countries as national standard. i--- Iec 60060-1 Pdf