Prefabricated capacitive graded splice device

Claim 2

A capacitive graded splice device for joining the ends of two high voltage cables each having a central conductor and an outer shield, said device comprising: a non-conducting rigid supporting sleeve having an inner diameter larger than the outer diameter of the cables to be joined; an electrically conducting equipotential shielding ring concentrically mounted around the supporting sleeve at the longitudinal center thereof, the supporting sleeve having at least one slot therethrough under the equipotential shielding ring; a cable connector positioned within the supporting sleeve at the longitudinal center thereof for electrically connecting the central conductors of the two cables to be joined; electrically conducting electrostatic connector means extending from the cable connector to the equipotential shielding ring through the slot or slots in the supporting sleeve; a pair of capacitive graded sections formed from alternating layers of helically wound capacitive tapes and insulating tapes, the sections concentrically mounted around the supporting sleeve adjacent both ends of the equipotential shielding ring, the capacitor elements of the sections located at the end of each of the sections adjacent the equipotential shielding ring being electrically connected to it; a cylindrical insulating member concentrically mounted around the capacitive graded sections and the equipotential shielding ring; and an electrically conducting metallic shield concentrically mounted around the cylindrical insulating member for connection to the outer shields of the cables to be joined, the electrically conducting metallic shield being connected to the capacitor elements located at the end of each of the capacitive graded sections remote from the equipotential shielding ring.

Claim 3

The cable splice device of claim 1 further including paper tubes concentrically mounted within the supporting sleeve for positioning the sleeve on each of the cables to be joined.

Claim 4

A capacitive graded splice device for joining the ends of two high voltage cables each having a central conductor and an outer shield, said device comprising: a non-conducting rigid supporting sleeve having an inner diameter larger than the outer diameter of the cables to be joined; an electrically conducting equipotential shielding ring concentrically mounted around the supporting sleeve at the longitudinal center thereof, the supporting sleeve having at least one slot therethrough under the equipotential shielding ring; a cable connector positioned within the supporting sleeve at the longitudinal center thereof for electrically connecting the central conductors of the two cables to be joined; electrically conducting electrostatic connector means extending from the cable connector to the equipotential shielding ring through the slot or slots in the supporting sleeve; a pair of capacitive graded sections formed from alternating layers of spirally wound capacitive sheets and insulating sheets, the sections concentrically mounted around the supporting sleeve adjacent both ends of the equipotential shielding ring, the capacitor elements of the sections located at the end of each of the sections adjacent the equipotential shielding ring being electrically connected to it; a cylindrical insulating member concentrically mounted around the capacitive graded sections and the equipotential shielding ring; and an electrically conducting metallic shield concentrically mounted around the cylindrical insulating member for connection to the outer shields of the cables to be joined, the electrically conducting metallic shield being connected to the capacitor elements located at the end of each of the capacitive graded sections remote from the equipotential shielding ring.

Claim 5

A capacitive graded splice device for joining the ends of two high voltage cables each having a central conductor and an outer shield, said device comprising: a non-conducting rigid supporting sleeve having an inner diameter larger than the outer diameter of the cables to be joined; an electrically conducting equipotential shielding ring concentrically mounted around the supporting sleeve at the longitudinal center thereof, the supporting sleeve having at least one slot therethrough under the equipotential shielding ring; a cable connector positioned within the supporting sleeve at the longitudinal center thereof for electrically connecting the central conductors of the two cables to be joined; electrically conducting electrostatic connector means extending from the cable connector to the equipotential shielding ring through the slot or slots in the supporting sleeve; a pair of capacitive graded sections formed from alternating layers of spirally wound capacitive sheets and insulating sheets, the sections concentrically mounted around the supporting sleeve adjacent both ends of the equipotential shielding ring, the capacitor elements of the sections located at the end of each of the sections adjacent the equipotential shielding ring being electrically connected to it; a cylindrical insulating member concentrically mounted around the capacitive graded sections and the equipotential shielding ring; and an electrically conducting metallic shield concentrically mounted around the cylindrical insulating member for connection to the outer shields of the cables to be joined, the electrically conducting metallic shield being connected to the capacitor elements located at the end of each of the capacitive graded sections remote from the equipotential shielding ring.

Claim 6

The cable splice device of claim 3 further including paper tubes concentrically mounted within the supporting sleeve for positioning the sleeve on each of the cables to be joined.