4. Changes in power line insulation

Insulators made of composite materials have developed mainly in two segments: compact lines (figure 13 ) and lines located in areas of high environmental pollution, for which leakage current limitation on the insulator surface is ensured by a hydrophobic silicone coating. While the first area of application is still undoubtedly the preferred sector for composite materials, their systematic use in highly polluted areas is now being called into question. This is a direct consequence of the incidents, risks, difficulties of working under voltage, line inspection and various reliability problems encountered with this technology over the past decade.

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Changes in power line insulation

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Conclusion

Bibliography

(1) - ZARZYCKI (J.) - Les verres et l'état vitreux. - Masson (1982).
(2) - RIVIERE (D.) - Le verre trempé et son utilisation pour l'isolement des lignes aériennes à haute tension. - RGE, n° 5 (mai 1966).
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Events

CIGRE International Council on Large Electric Systems, sessions held every two years in Paris (even-numbered years) http://www.cigre.org

JEC Composites Show held every year in Paris http://www.jeccomposites.com

Standards and norms

International Electrotechnical Commission

Insulators for overhead lines with nominal voltage above 1,000 V – Part 1: Ceramic or glass insulator elements for AC systems – Definitions, test methods and acceptance criteria - CEI 60383-1 - 1993
Insulators for overhead lines with nominal voltage above 1,000 V – Part 2: Isolator chains and equipped isolator chains for AC systems - CEI 60383-2...