Mr. Radosavljevic obtained his M Sc in Electrical Engineering from the University of Belgrade. After working in different roles in design and building of substations, HV cables and overhead lines in Nigeria, Russia and Serbia, he spent 15 years in the Swedish power industry as a consultant
at SwedPower and Vattenfall Power Consultants before joining Svenska Kraftnät in 2011. His experience covering over 20 years has made him
an expert in substations and cables, covering all aspects from design to installation to commissioning to refurbishment. This includes writing
technical guidelines for components such as post insulators, insulator sets, surge arresters and connectors.
While pollution levels in Sweden are relatively low, composite hollow core insulators are used for all circuit breakers and instrument transformers due to safety concerns. Although experience has been good, research was conducted to verify their condition after about 20 years’ service. By contrast, composite station post insulators have shown indications of problems. This presentation provides practical information on the policy and experience of the Swedish TSO using composite hollow core apparatus insulators and substation post insulators along with recommendations for detailed specifications for composite post insulators in order to maintain reliable long-term performance.