Impulse Voltages in Windings

Citation

Gainder, Melvin Earnest (1934) Impulse Voltages in Windings. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/8jct-jh08. https://resolver.caltech.edu/CaltechTHESIS:10022024-204244331

Abstract

An outline of the technique of making impulse voltage measurements by cathode ray oscillograph is given. Circuits for operating, timing and synchronizing of oscillograph and impulse generator are discussed. Certain details of the technique of operating an oscillograph and of impulse testing are also mentioned.

The results of experimental determination of the effects of impulse voltages on distribution transformers are given in the form of oscillograms and conclusions derived therefrom. It may be said that, in general, the characteristics of such transformers are similar to those of power transformers.

A brief study of the literature of the subject is included.

A study of the mechanism of transient voltage production in transformers has led to development of a semi-empirical form of analysis which permits calculation of terminal transients after certain empirical constants are obtained by test. The method is essentially that of finding the response of the transformer to infinite rectangular applied wave from a few cathode ray oscillograph tests. By application of the superposition theorem, the response to any arbitrary wave can then be determined.

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