: Covered natively under the design umbrellas of IEC 60099-4.
The standard document provides definitive international guidelines for the selection and application of surge arresters in three-phase power systems operating above 1 kV . Officially titled "Surge arresters – Part 5: Selection and application recommendations," the latest version is the Third Edition (2018) , which replaces older iterations to incorporate technical adjustments from IEC 60099-4. High-voltage engineers and utility managers use this document to calculate protective levels, establish insulation coordination, and manage the complete lifecycle of grid-protective assets.
Used specifically on overhead power lines. iec 600995 pdf link
The current 3.0 edition represents a major technical overhaul that aligns engineering practices with the structural changes introduced in core manufacturing standards.
The 2018 version (Edition 3.0) represents a significant technical revision over the 2013 edition. Major highlights include: IEC 60099-5:2018 : Covered natively under the design umbrellas of IEC 60099-4
Guidelines for determining Rated Voltage (Ur) and Maximum Continuous Operating Voltage (Uc) .
To ensure you are looking for the correct document, you need to know the edition history. Using the wrong (withdrawn) edition could lead to non-compliance with modern safety standards. The 2018 version (Edition 3
: The arrester must handle longer, system-frequency overvoltages caused by single-phase earth faults without entering thermal runaway.
For US-based procurement, the ANSI Webstore provides the PDF with Digital Rights Management (DRM) protections. Scope and Technical Purpose