The ultimate voltage drop across the arrester during the discharge of surge currents—a foundational value required to ensure insulation protection margins. Major Technical Revisions in the Latest Edition
The IEC 60099-5:2018 standard can be accessed for purchase directly through the Official IEC Store iec 600995 pdf link
: The arrester must handle longer, system-frequency overvoltages caused by single-phase earth faults without entering thermal runaway. The ultimate voltage drop across the arrester during
: The primary source for the latest edition (Edition 3.0, 2018). iec 600995 pdf link