ES445134A1 - Improvements in high voltage electric power cables. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improvements in high-voltage electric power cables, to be used underground, of the type they comprise in combination, a wired conductor, a layer to control the tension that forms a shield around the driver leaving it encased, a cable sealing compound that fills all the spaces between the cords that make up the cable and any space between the cords and the tension control layer to avoid the presence of moisture and water vapor inside the conductor wiring, and the entry of air and moisture through a end of the cable, being the sealing compound of the semiconductor cable, and an insulation system constructed to avoid the formation of electrochemical branches in the insulation, characterized in that each cable is provided with an extruded solid polyethylene insulation layer that tightly surround the layer of tension control, so that moisture can not penetrate the ends of the cable into the interface between the insulation and the voltage control layer, an extruded solid semiconductor insulation shield that tightly encloses the insulation to prevent moisture from entering between the insulation and the insulation shield, a metal shield surrounding the insulation shield semiconductor, and an additional sealing compound that comprises a semiconductor compound between the insulation shield and the metal shield and that fills any gap between the insulation shield and the metal shield to prevent moisture from penetrating the metal shield to reach the insulation shield, being the sealing compound chemically and physically compatible with the voltage control layer and with the insulation protector, and which consists of a compound and which maintains its physical and electrical characteristics despite the temperature caused by the load cycles of the cable force. (Machine-translation by Google Translate, not legally binding)