CAPACITANCE CONTROLLING PROCESS

摘要

A process for controlling the capacitance value of a tubular sheath formed by extrusion of an insulation compound on an electrical cable in an extrusion head, where a foaming agent is introduced in the insulation compound to improve the capacitance value of the tubular insulation sheath, the process including the steps of: using a predetermined amount of foaming agent to obtain a predetermined capacitance value for the tubular insulation sheath, applying a gas pressure on at least a portion of a face of the insulation compound extruded by the extrusion head in order to control precisely the capacitance value of the tubular insulation sheath, and changing the value of the gas pressure to control the capacitance value of the tubular insulation sheath.