Title :
Electrical properties for diagnosis of sulfide-tree growth in cables under dc stress
Author :
Anelli, P. ; Motori, A. ; Ghinello, I. ; Mazzanti, G. ; Montanari, G.C.
Author_Institution :
Pirelli Cavi SpA, Milano, Italy
Abstract :
Electrical properties, that is, AC electric strength and DC conductivity, are measured at different aging times in cable models immersed in sea water with hydrogen sulfide and supplied at two voltage levels. Test conditions are studied in order to favour growth of electrochemical, or sulfide, trees. Cable models have copper conductor and polyethylene insulation. It is shown that both electric strength and conductivity significantly vary with tree-growth time, providing tools for cable degradation diagnosis
Keywords :
ageing; electric strength; electrical conductivity; electrochemistry; environmental degradation; insulation testing; insulator contamination; polyethylene insulation; power cable insulation; power cable testing; power cables; submarine cables; trees (electrical); AC electric strength; Cu; DC conductivity; DC stress; H2S; aging; cable degradation diagnosis; copper conductor; electrical properties; electrochemical tree; hydrogen sulfide; polyethylene insulation; sea water; sulfide tree growth; Aging; Conductivity measurement; Copper; Electric variables measurement; Hydrogen; Sea measurements; Testing; Trees - insulation; Voltage; Water;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1997. IEEE 1997 Annual Report., Conference on
Conference_Location :
Minneapolis, MN
Print_ISBN :
0-7803-3851-0
DOI :
10.1109/CEIDP.1997.634616
