Failure analysis and inspection of long term behaviour of selected medium voltage equipment

In the service area of the Hungarian DSOs many of the failures of medium voltage devices are related to the lack of requirements regarding to the technical side of the procurement processes. The main aim of a research and development project executed by the High Voltage Laboratory of Budapest University of Technology and Economics was the inspection of current failure rates and typical ways of failures of composite insulators, cross-arms, surge arresters, concrete poles, conductor connectors (including live-line connectors), medium voltage fuses and rigid bird protective covers.