Including series and parallel gapped arresters rated ≤is less than or equal to 52 kV per IEC 60099-6 .

Selection workflows now place heavier emphasis on maximum residual voltage as the primary parameter for insulation coordination.

Annex D was updated to include modern service monitoring techniques, such as leakage current measurement with harmonic compensation.

Instead of the old "Class 1 to 5" system, arresters are now classified by their thermal energy dissipation and repetitive charge transfer capability ( Qrscap Q sub r s end-sub

Specifically Externally Gapped Line Arresters (EGLA) defined in IEC 60099-8 . 2. Key Updates in the Latest Edition (Edition 3.0)