Low-voltage D-C measurements on electrical insulating oils

THE development work and experimental results presented herein have been a part of a co-operative project of the Utilities Co-ordinated Research, Inc. (Association of Edison Illuminating Companies) and the Massachusetts Institute of Technology. The purpose of this joint research project is the investigation of the mechanism of the deterioration of electrical insulating oils and the development of methods and apparatus for the study of this deterioration, with special reference to its influence on the electrical characteristics. It was for this reason that it was desirable to investigate the conductance of electrical insulating oils and methods of determining the conductance of such oils.