Three-phase wattmeter connections

FOR the past 15 years or more there have occured recurrently in technical literature articles giving methods of checking the connections of three-phase wattmeters. In February 1916 Prof. W. B. Kouwenhoven presented a long and detailed paper to the American Institute on the subject. (Vol. 35, Part I, page 183). Practically all these writings point out the frequency with which misconnections occur and their difficulty of detection. In fact this constant recurrence of the subject itself vouches for its importance but it might seem, particularly after Prof. Kouwenhoven's treatment, that another discussion of the subject would be a little superfluous. The writer feels, however, that this is not the case for the reason that all of the existing discussions of the subject which have come to his notice are either incomplete or contain serious errors.