Original scientific paper

DIELECTRIC COMPARISONS OF DIFFERENT TYPES OF ARAMID INSULATION

Richard P. Marek ; DuPont, Energy Solutions

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.

Keywords

aramid; dielectric strength; insulation testing; liquid-immersed transformer; breakdown testing

Hrčak ID:

198817

URI

https://hrcak.srce.hr/198817

Publication date:

15.7.2017.

Visits: 467 *