Abstract :
Following the presentation of the suggested definition of distortion factor given above, the Instruments and Measurements Committee presented at the meeting of the Standards Committee of May 9th a progress report outlining in detail four methods of determining the distortion factor of the voltage wave of alternators. The methods described are as follows: (A) Method of Boucherot using an alternator with a sinusoidal wave and a voltmeter. (B) Method of Belfils using a bridge to suppress the fundamental and a voltmeter to read the residue. (C) From the Oscillogram. (D) By means of a harmonic analyzer. The Instruments and Measurements Committee is gathering further data on this subject, which it is hoped will show which of the various methods is preferable.
