As of April 2025, the standard is in its . This edition replaces the previous 2010 version and introduces technical revisions to improve usability and address ultra-high voltage (UHV) requirements. IEC 60060-1:2010 (Edition 3) IEC 60060-1:2025 (Edition 4) Lightning Impulse Standard front time tolerances. Front time tolerance extended for Switching Impulse Traditional definition. New front time definition introduced (170/2500 µs). Layout Traditional format. Updated for better clarity on combined/composite voltages. Annexes Atmospheric correction formulas. New Annex C for manual calculation from waveforms. Core High-Voltage Tests Covered

: Testing for power-frequency withstand, typically involving a one-minute exposure to elevated voltages.