A General Formulation of Impedance and Admittance of Cables

Abstract

Interest in the analysis of wave propagation characteristics and transients associated with cable systems has rapidly increased. In order to answer the need of the analyst, impedances and admittances of various cables have to be known. This paper describes a general formulation of impedances and admittances of single-core coaxial and pipe-type cables. The formulation presented here can handle a coaxial cable consisting of a core, sheath and armor, a pipe-type cable of which the pipe thickness is finite and an overhead cable, which has not been discussed in the literature heretofore.