MULTIPLE STRESS AGING OF SOLID-DIELECTRIC EXTRUDED DRY-CURED INSULATION SYSTEMS FOR POWER TRANSMISSION CABLES

A detailed examination of the aging processes, that may take place in solid-dielectric extruded-type high voltage transmission cables under dry conditions, is presented. Particular emphasis is placed on the agi ng process as affected by the separate and simultaneous action of four main aging factors, namely the electrical, mechanical and thermal str esses, and the physical and chemical environment. A number of pertinen t aging: models are considered and their validity and applicability to accelerated aging tests on solid-type transmission cables are discuss ed.