Procedures for applying multiple types of voltage stress simultaneously or in sequence to simulate complex real-world conditions. Significant Changes in the 2025 Edition (Edition 4)
Used primarily for cable testing and certain specialized HV apparatus.
) above and 1.5 kV DC . It is essential for manufacturers, testing laboratories, and utility operators to verify the insulation performance and reliability of components like transformers, switchgear, and insulators.
Published by the International Electrotechnical Commission (IEC) , this standard establishes unified guidelines for dielectric tests on equipment with a highest system voltage ( Umcap U sub m