Progress Report of D-C Testing of Generators in the Field

Abstract
For many years the company with which the authors are associated endeavored to find some satisfactory method of testing generator insulation in the field. With this in mind, it was decided to experiment with higher d-c potentials. Several d-c testers were built and a series of tests made. This paper describes the progress during the first ten years of testing generators in the field with high d-c voltage.

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