A New Mobile 600-kV 20-mA Test Set

This paper reviews the general problems attendant on the transmission of bulk energy and the necessity for high-voltage test sets. It analyzes the specific nature of direct-potential testing of EHV cables, especially oil/paper dielectric types. It examines in detail the design concepts of the new test set, discussing the Insulating Core Transformer (ICT), a recent innovation which is the essential transformer/rectifier unit. The paper also reviews some of the problems and procedures utilities experience with the new supervoltage feeders now coming into prominence.