Test values of armature leakage reactance

Armature leakage reactance of synchronous machines has recently received considerable attention because of the important part which it plays in the accurate calculation of the performance of the saturated machine. (See, for example, reference 15 at end of this paper.) Test methods for determining the proper values of armature leakage reactance, and the results of these tests, are presented in this paper and should be of interest as an indication of the reliability of the formulas for the unsaturated value of this reactance and also as an indication of the variations in the reactance due to machine saturation. This paper is a companion paper to “Tests on Armature Resistance of Synchronous Machines” appearing on pages 705–9 of this issue.