Abstract :
In this paper the author deals with one of the questions with which the International Electrotechnical Commission is at present occupied; namely, the determination by simple tests of the actual losses in alternators. The author first reviews the existing rules and then states the variation of the losses in alternators as a function of the load and as a function of the power factor. His paper contains records of experimental researches which he has made and which serve on the one hand as a basis for discussion of the theoretical considerations which he develops and on the other hand to compare the actual losses with those obtained by the methods given in the rules at present in force. The author does not present definite conclusions since, in his opinion, these investigations ought to form the basis for a program of future researches and ought to serve as the basis for discussions in the Rating Committee of the International Electrotechnical Commission.
