Studies about the breakdown voltage of some liquids insulators

Generally insulating composites consist of two components like solid-liquid or solid-gas composites. In this article is presented some test made on different insulation oils - mineral oils, natural esters, synthetic esters - in order to view the breakdown voltage. Liquid electrotehnic materials that were studied are widespread in electrical equipments, and their use with good result involves taking some measure in order to extend their exploitation at optimal parameters, and carry out regular tests on the specific parameters.