: Specifies procedures for verifying if insulation can hold a rated voltage (withstand) or at what point it fails (disruptive discharge).
The IEC 60060-1:2025 (Edition 4.0) standard defines essential, updated requirements for high-voltage dielectric tests, including AC, DC, and impulse testing for equipment exceeding 1.0 kV AC or 1.5 kV DC. Key updates in this latest edition include modified impulse tolerances for UHV systems, revised switching impulse definitions, and new Annex C calculation procedures. Purchase the official standard at the IEC Webstore . IEC 60060-1:2025 i--- Iec 60060-1 Pdf
The fourth edition (2025) introduced significant updates to improve usability and accommodate ultra-high voltage (UHV) systems: IEC Webstore New Switching Impulse Definition : Standard switching impulse is now defined as 170/2500 µs , and the term "time-to-peak" has been replaced with " front time " to align with lightning impulse terminology. UHV Tolerance Updates : Specifies procedures for verifying if insulation can