Resistor and capacitor graded termination

Claim 1

A termination of a prepared end of a cable, the cable having a conductor, an insulating layer therearound and a grounded outer shield, the termination being adapted when constructed of sufficient size for shielding the cable when carrying DC power in the high potential range whereat power losses in DC transmission approach or become less than power losses in AC transmission, the termination comprising an outer annular insulator, a plurality of annular capacitors stacked axially within said insulator and defining an axial passageway for receiving the prepared end of the cable therethrough, said capacitors each comprising a strip of dielectric material and a strip of metal wound as alternate layers coaxial with said insulator, said capacitors providing sufficient capacitance for relieving electrical stress resulting from transient AC currents attendant a cable carrying the high potential DC power, electrically and thermally conductive rings interposed between adjacent ones of said stacked capacitors, said rings having interior diameters substantially matched to the interior diameters of said capacitors, exterior diameters at least about as great as the exterior diameters of said capacitors, and tab means extending outward of said stacked capacitors for connection to resistors, at least two resistors electrically connected to said tab means and interconnecting, in parallel, successive stacked rings so as to provide a highly resistive pathway from the conductor to ground to relieve the electrical stress of the high potential DC power, said resistors each having a ceramic core and a semiconductive film spiralled therearound, and liquid dielectric contained within said outer annular insulator and immersing said resistors and said capacitors.