D.C. Insulation Analysis: A New and Better Method

A recently developed method provides better analysis of insulation when testing with direct current. The problems of insulation analysis are first reviewed as background to the discussion. The paper then explains the new method in this context. Comparison is made between the new method and existing techniques. The circuit design of a new instrument based on this method is described. There is a discussion of the problems of measuring capacitive specimens with a recent history of voltage applications. Finally, there is a brief comment on practical results obtained by application of the method.