Example: For a medium‑voltage transformer rated 20 kV, IEC 60060-1 supplies the terminology and general test procedures that a transformer standard (e.g., IEC 60076) will reference to specify required power‑frequency and impulse test voltages.
: The 2025 revision increased the allowable measurement uncertainty for lightning impulse front time from Applications and Industry Importance i--- Iec 60060-1 Pdf
: Reorganized clauses for combined and composite voltages to make them more accessible for laboratory use. iTeh Standards 4. Essential Related Standards Example: For a medium‑voltage transformer rated 20 kV,