Electromagnetic Unbalance of Untransposed Transmission Lines; II. Single Lines With Horizontal Conductor Arrangement [includes discussion]

Various configurations of single-circuit overhead lines without and with ground wires have been considered in a previous investigation of unbalance factors mo and m2.1 In this part of the study, electromagnetic unbalance has been calculated and balance factors plotted for single-circuit overhead transmission lines with horizontal conductor arrangement and two ground wires, so located in many different positions that the protective angle differs from the 30 degrees of the earlier analysis. Since many new lines have been built with a smaller protective angle, the arrangements covered in the investigation may become valuable for application considerations. All computations have been made on an International Business Machines card program calculator, and the basic procedure is given in the Appendix.