Abstract :
Means are considered whereby the separate subconductors of a bundle-conductor line may be insulated from one another for the purpose of intrabundle communication without detracting from the performance of the line in its primary function of power-frequency transmission. Design criteria are derived for those fittings which would be required to replace conventional ones, and outline designs in suitable materials are suggested for this purpose. Based on the incorporation of such insulated fittings, consideration is given to the effects on the line performance which may be expected from a variety of incidents including mechanical, climatic, power-frequency and surge phenomena, compared to the known performance of a line of conventional construction. It is concluded that no adverse performance would be expected for power transmission and that certain advantages could accrue. Consideration is also given to the effects of the same incidents upon the superimposed communication link, and it is shown that these effects are likely to be of a minor nature and mainly transitory.
