KR950009751A - Power cable with insulation strength - Google Patents

Abstract

Power cables with enhanced dielectric strength include an electrical core and a first polymer dielectric that insulates the core, which has a final conductivity of 10 ^-14 S / cm or less for DC use and AC for use. It consists of an insulating polymer matrix in which at least one kind of conductive polymer is incorporated at a weight concentration of 10 ⁻¹⁰ S / cm or less.

Description

Power cable with insulation strength

Since this is an open matter, no full text was included.

1 is a cross-sectional view of the power cable of the present invention,

23h is a sectional view of a different embodiment of the cable of FIG.

Claims (9)

In a DC power cable having a strong dielectric strength and comprising an electrical core and a first polymer dielectric layer for insulating the core, the first polymer dielectric layer has a weight concentration such that its final conductivity is 10 ^-14 S / cm or less. Wherein the DC power cable is constituted by an insulating polymer matrix containing at least one conductive polymer. In an AC power cable having a strong dielectric strength and comprising an electrical core and a first polymer dielectric layer for insulating the core, the first polymer dielectric layer has a weight concentration such that its final conductivity is 10 ^-10 S / cm or less. AC power cable, characterized in that consisting of an insulating polymer matrix containing at least one conductive polymer. The method of claim 1, wherein the conductive polymer is non-doped or de-doped and is a polymer having a concentration of about 5% by weight or less in the polymer matrix. cable. The cable of claim 1 or 2, wherein the conductive polymer is a self-doped polymer having a concentration of about 2% by weight or less in the polymer matrix. The device of claim 1, further comprising an internal semiconductor screen between the electrical core and the first dielectric layer and an external semiconductor screen between the first dielectric layer and an outer protective enclosure; Wherein each of said semiconductor screens is constituted by an insulating polymer matrix containing conductive polymers at a weight concentration such that their conductivity is not greater than 1 S / cm. 6. The cable of claim 5, wherein the conductive polymer is a polymer non-doped or de-doped at a concentration within the polymer matrix of the semiconductor screen in the range of 5% to 70% by weight. 6. The cable of claim 5, wherein the conductive polymer is a self-doped polymer having a concentration in the polymer matrix of the semiconductor screen of at least 5% by weight. 8. A further second inner dielectric layer (7) below the first dielectric layer (3) and a further third outer dielectric layer covering the first dielectric layer (3). (8) further; Each of the second inner dielectric layer 7 and the third outer dielectric layer 8 is a non-doped poly and is constituted by an insulating polymer matrix containing a conductive polymer selected from a di-doped polymer and a self-doped polymer; The conductivity of the second and third dielectric layers is in the range of 10 ^-14 S / cm to 1 S / cm for DC use, and in the range of 10 ^-10 S / cm to ¹ S / cm for AC use. Cable. 9. The method of claim 8, wherein at least one of the second and third dielectric layers comprises a plurality of sublayers having different concentrations of conductive polymer; Wherein the concentration of successive sublayers of the second dielectric layer begins to decrease from the innermost sublayer, and the concentration of successive sublayers of the third dielectric layer begins to increase from the innermost sublayer. ※ Note: The disclosure is based on the initial application.