Abstract
This paper summarizes the results of a number of very different test programs designed to characterize the dielectric performance of three families of aramid paper products. The first part of the testing includes a range of papers that seem well suited to layer type liquid-immersed transformer winding applications. The rapid rise breakdown testing includes multiple thicknesses of the three aramid families that vary in density and surface texture. Wire wrap insulation is the focus of the second part of the testing examined. The results include several different types of test programs, ranging from single flat sheet to multiple flat sheets to actual wire wrapped with multiple thicknesses of the sample insulation. In this series, both rapid rise and impulse breakdown testing is reported. Where possible, statistical analysis was used to make comparisons.
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