Iec 600995 Pdf Upd (2025)

As of 2026, the 2018 edition remains the active standard, representing a significant technical overhaul from its 2013 predecessor. The crucial updates within this edition, which continue to dominate engineering practices, include:

: The standard now uses the "charge classification" system (e.g., Qrscap Q sub r s end-sub Qthcap Q sub t h end-sub

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: Industry experts like Volker Hinrichsen released updated "Seminar Editions" in late 2024/early 2025 to help users navigate the transition between old line discharge classes and new charge-based classifications. International standard IEC 60099-5:2018 - Afnor EDITIONS iec 600995 pdf upd

The standard applies to several types of modern surge arresters, including:

The primary driver for the update was the shift from "line discharge classes" to a more precise system based on .

Detailed recommendations for handling switching surges, lightning surges, and temporary overvoltages (TOV). As of 2026, the 2018 edition remains the

: Added Annex H and Annex I, which provide detailed comparisons between the old line discharge classes and the new charge-based classifications. Expanded Equipment Scope : The guide now provides recommendations for gapless metal-oxide arresters

and less, these components combine series and parallel gapped architectures as specified in IEC 60099-6.

– official source: https://webstore.iec.ch International standard IEC 60099-5:2018 - Afnor EDITIONS The

Following the standard requires a methodical step-by-step sizing sequence: Determine the Maximum Continuous Operating Voltage (MCOV / Uccap U sub c

used for lightning flashover prevention on overhead transmission lines as defined by IEC 60099-8.

Specialized units configured strictly for overhead transmission lines to eliminate continuous electrical stress on the housing, governed by IEC 60099-8 . Key Technical Updates in the Latest Standard (Ed. 3.0)