Inductive Co-ordination Aspects of D-C Systems Supplied by Rectifiers

This report is similar in many respects to the committee report on Inductive Co-ordination Aspects of Rectifier Installations, published in 1946,¹ with the important difference that the latter dealt solely with the a-c side. The present report, which deals with effects associated with d-c systems supplied by rectifiers, can be considered as complementing the 1946 report and material contained in the latter is not generally repeated here. To date, inductive co-ordination problems associated with the output side of rectifiers have involved chiefly d-c traction systems having a single overhead trolley per track (that is, ground-return systems) particularly those having nominal operating voltages of the order of 600 volts direct current. Hence, subsequent to Part II, which describes ways of classifying the d-c sides of proposed installations into three categories, the major part of the more detailed discussion and quantitative information in this report is devoted largely to the 600-volt system with overhead trolley. Summarized technical information, which will serve at least as background material and which will generally be useful in case the inductive co-ordination aspects of a specific rectifier installation require more or less detailed study and analysis also is included.