Developing Safe Working Procedures for EHV DC Hotline Maintenance

An important phase of the investigative work preparatory to the operation and maintenance of the Pacific Northwest- Southwest dc intertie is the development of safe working procedures.[1] This paper describes the laboratory and field tests performed to determine the dc characteristics of hotline tools, and to gain more knowledge of certain phenomena peculiar to dc systems which may influence maintenance procedures. made available for printing May 2, 1967.