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This investigation is dedicated to the development of a new class of nanostructured composite material from cycloaliphatic epoxy polymers with nanoclay and microsilica as the fillers and the analysis of the behavior associated in the inclined plane tracking test (IEC 60587). Composite materials with different weight percentages of fillers were prepared and subjected to electrical tracking according...
The present work concerns the partial discharge (PD) activity in simple insulating system (twisted pairs) when switching voltage waveforms are applied. A special low frequency PD coupling system allowed to determine two quantities indicating the stress actually connected with the PD activity. Such parameters have been considered to determine life prediction models
An experimental study, aimed at the identification of specific cable behaviour during "burn tests" was implemented by performing suitable tests at different temperatures. The adopted fire-resistance test end-point criterion was the short-circuit between the energized conductors or between a conductor and a grounded screening tape. The variation with time of the insulation resistance, measured...
Flat-conductors made by high temperature superconducting filaments can be electrically insulated by a host of different materials. After selecting the best performing system, an electrical characterisation stage has been implemented through dielectric breakdown tests in air and in liquid nitrogen (LN2) and through ageing in LN2, at atmospheric pressure
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