Attenuating voltage surges in power cable by modifying the semiconductive shields

A novel functionality can be added to solid dielectric power cable by optimizing semiconductor shield properties for attenuation of high frequencies propagating down the cable. A cable optimized for high frequency attenuation can protect inductive devices, such as rotating machines and transformers, from damage induced by short risetime transients generated by switching devices and lightning. The use of an optimized surge attenuating cable (SAC) for this purpose effects protection in a manner which is economic and has no negative implications for system reliability. SAC concepts and attenuation characteristics are discussed. SAC applications to surge protection of inductive devices and to distribution system cabling are considered