Surge arresters with series and parallel gapped structures rated at 52 kV or less (IEC 60099-6).
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for metal-oxide surge arresters. Unlike previous versions, it emphasizes: Residual Voltage Optimization
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If you need to see exactly what changed from the previous edition, look for the RLV (Redline Version)
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Enhanced guidance for protecting cable sheaths, rotating machines, capacitor switching, and UHV (Ultra High Voltage) systems. Critical Selection Parameters
: New annexes (Annex H and I) provide detailed comparisons and calculations to help users transition from old line discharge classes to the new charge-based classification.
If you can tell me (e.g., substation, transmission line, or medium-voltage distribution), I can help identify the relevant sections of the standard you should focus on. IEC 60099-5:2018