Power Cable Termination Device For Gas-Insulated Switchgear

摘要

A power cable termination device for a high voltage direct current gas-insulated switchgear including: an outer housing made of an electrically conducting material, connectable to the switchgear; a terminal portion of a power cable, the power cable including an electrical conductor, a circumferential electrically insulating layer, and a circumferential conductive shield which is stripped off along a first part of the power cable; an electric field grading system including a resistive field grading material layer arranged circumferentially around the power cable to axially cover the edge of the conductive shield where the conductive shield is terminated, the resistive field grading material layer being in electrical contact therewith, and a connection device connectable to the gas-insulated switchgear and arranged to provide mechanical support and electrical contact with the gas-insulated switchgear.

主权项

1. A power cable termination device for a high voltage direct current gas-insulated switchgear, the power cable termination device comprising:
an outer housing made of an electrically conducting material, the outer housing being fixedly connectable at a first end thereof to the high-voltage direct current gas-insulated switchgear, a terminal portion of a power cable, the power cable comprising an electrical conductor, an electrically insulating layer circumferentially surrounding the electrical conductor, and a conductive shield circumferentially surrounding the insulating layer and the electrical conductor, wherein the conductive shield is stripped off along a first part of the power cable, an electric field grading system comprising a resistive field grading material layer, which is made of a non-linear resistive field grading material, arranged circumferentially around the power cable such as to extend axially at least along a part of the electrically insulating layer and such as to cover the edge of the conductive shield where the conductive shield is terminated, the resistive field grading material layer being in electrical contact therewith, and a connection device connectable to the gas-insulated switchgear and arranged to provide mechanical support and electrical contact with the gas-insulated switchgear.