Electrified Railroad Supply from Utility Transmission Systems

This paper examines problems associated with utility supply to single-phase, 60-cycle railway loads from the 3-phase utility transmission system. Supply techniques and limitations are recommended which will insure satisfactory operating conditions from both utility and railroad standpoints. Service aspects considered include: reliability and supply station facilities, phase and voltage unbalance effects, anticipated power factor, harmonics, radio, and inductive interference. There appear to be no insurmountable problems associated with supplying foreseeable railway loads from utility high-voltage transmission systems and no requirement for railroad transmission facilities or special balancing equipment exists.