Current IEC standards for power cable systems up to and above 150 kV rated voltage are manufacturer standards and, according to experts, do not necessarily provide adequate recommendations for testing after-installation.
Numerous problems have been reported due to pollution deposition on the surface of high voltage outdoor insulators. Although accumulation of pollution is typically most severe in coastal and desert areas…
Porcelain insulators have been used in electrical systems for over 120 years but designs have changed as these became proportionately greater in height with increased voltage requirements.
In spite of lack of international standards and limited field studies dealing with high voltage insulators coatings (HVIC), the past decade has seen sharp growth in interest among utilities worldwide.
Hydrophobicity is the most recognized property of silicone rubber materials used for outdoor insulation and key to providing their added value of enhanced pollution performance.