IEC 60099-5 is an international standard published by the International Electrotechnical Commission (IEC). It forms a vital part of the IEC 60099 series, which specifically governs surge arresters.
to understand how they are prioritized based on lightning exposure. insulation coordination calculations? IEC 60099-5:2018
The standard has evolved. The most widely referenced version is IEC 60099-5:2018 (Edition 3.0). This edition replaced the 2000 version and its amendment, incorporating significant changes regarding high-voltage arresters and modern Metal-Oxide (MO) technology.
Governed by IEC 60099-8. EGLAs are used to protect overhead distribution and transmission lines from lightning flashovers without placing structural thermal strain directly on the active varistor during normal line operations. Step-by-Step Methodology for Arrester Selection iec 600995 pdf
The modern edition of the standard, IEC 60099-5:2018 , applies to a wide spectrum of surge protection technologies. It coordinates tightly with the design and testing specifications of other entries in the IEC 60099 series:
The most direct source is the ( webstore.iec.ch ). You can search for any part (e.g., IEC 60099-4:2014), add it to your cart, and purchase it. You will receive a link to download the official, protected PDF.
To prevent catastrophic asset failure, the standard details non-destructive testing approaches to gauge the aging profile of zinc-oxide varistor elements: IEC 60099-5:2018 IEC 60099-5 is an international standard published by
| Source | Cost (approx.) | Access | |--------|---------------|--------| | (webstore.iec.ch) | CHF 150–400 per part | Instant official PDF, watermarked, multi-user licenses available | | ANSI Webstore (USA) | ~$220–$550 | Same PDF, sometimes bundled | | National standards bodies (BSI, DIN, AFNOR, JIS, etc.) | Varies (local pricing) | Often include national foreword | | IEC National Committee members | Free or discounted | If you are part of an electrotechnical committee | | University/Corporate subscriptions (e.g., IHS Markit, TechStreet) | Annual fee | Access to thousands of standards |
For an electrical engineer, mastering IEC 60099-5 is essential for ensuring that a 50 kA lightning strike does not destroy a multi-million dollar transformer. It ensures the delicate balance between (the arrester surviving the grid) and protection (the grid surviving the surge).
The shift from Line Discharge Classes to Charge-based ratings ( Qrscap Q sub r s end-sub Qthcap Q sub t h end-sub insulation coordination calculations
As an international standard, the document is protected by copyright. It is highly recommended to obtain the PDF from authorized sources to ensure you are using the latest, accurate version (Edition 3.0, 2018-01). IEC Webstore ANSI Store BSI Group (For the UK implementation, BS EN IEC 60099-5)
The latest version, IEC 60099-5:2018 , includes several vital diagnostic and selection methods:
The IEC 60099-5 Webstore Profile outlines how this standard optimizes insulation protection while preserving grid infrastructure. Unlike part-specific manufacturing standards that dictate factory testing procedures, Part 5 acts as an application handbook. Covered Technologies
The standard explicitly deals with three-phase AC systems above 1 kV. It provides standardized calculation frameworks for deploying several types of protective components:
New sections (Annexes H and I) were added to help users transition from old classifications to the new charge-based metrics. Expanded Calculations: