A New Method and Means for Measuring Dielectric Absorption

The progress of practically all electrical apparatus is to a large degree dependent on progress in insulation. The successful selection and use of insulation, particularly insulation operated with maximum economy as in the case of static condensers, depends on our progress in the understanding of the factors on which insulation quality depends. It has long been known that for a given working condition, reliability depends on dielectric losses, particularly the losses commonly referred to as hysteresis losses. The hysteresis loss is definitely related to the phenomenon of absorption or residual charge, especially when the residual voltage quickly builds up. In order to further analyze dielectric losses, and study the progress of treatment of insulation, a device has been developed for measuring dielectric absorption. This article describes the ``Dielectric Lag Meter'' and gives some test data secured by it.