EVALUATION OF AN IMPROVED RFI-SUPPRESSING POWER CONDUCTOR

摘要

An improved power conductor for suppressing radio frequency interference (RFI) was developed, consisting of 2 AWG stranded copper wrapped with two layers of 7-mil Silicon Iron (SiFe) magnetic tape and a 50-mil extruded polyvinyl chloride jacket. To evaluate its capability for attenuating RFI and its resistance to deterioration, the lossy conductor was installed on a 3-mile, 3-conductor, 4-kv power line on San Nicolas Island, off the coast of Southern California.nAttenuation exceeded that reported for the Fort Huachuca lossy line, at frequencies below 1 mc, and was equal or greater at higher frequencies. The stranded conductor's effect on attenuation is discussed, and curves are included for comparing the attenuation of solid and stranded conductors wrapped with lossy tape. Ambient noise levels are shown.nThe severe climate and its effect on the power line are discussed;test methods are described;and future developments are considered.