ABSTRACT
The representation of insulated cables for the simulation of electromagnetic transients requires the calculation of cable parameters from geometrical data and material properties, and the conversion of the cable parameters into a new set of parameters for usage by the transmission line/cable model. Several line models have been implemented in commonly available Electromagnetic Transients Program-type programs which can represent the frequency dependence of cable systems. This chapter discusses the properties of materials used in cables, and presents the most common cable designs. It deals with the calculation of parameters for the most common types of high-voltage cable systems and the conversion procedure required for actual single-core coaxial cable systems. The relative permittivity of the cable main insulation can be obtained from the manufacturer. Submarine cables are normally designed with a steel armor to provide additional mechanical strength. Cable constants routines require users to specify the grounding conditions of metallic sheaths and armors.
