Growth properties of sulfide trees in cables under dc stress

Author

Anelli, P. ; Motori, A. ; Ghinello, I. ; Mazzanti, G. ; Montanari, G.C.

Author_Institution

Pirelli Cavi SpA, Milano, Italy

Volume

4

Issue

6

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

800

Lastpage

805

Abstract

Investigations on the growth properties of sulfide tree in cable insulation, subjected to dc electric fields, are described in this paper. Measurements of electric strength and conductivity are correlated to tree growth, observed by optical and electron microscopy, during accelerated aging tests performed in sea water with hydrogen sulfide. It is shown that both electric strength and dc conductivity are very sensitive to the length and concentration of sulfide trees, and that the magnitude of the electric field affects tree shape and growth rate significantly

Keywords

ageing; electric strength; electrical conductivity; electron microscopy; insulation testing; life testing; optical microscopy; polyethylene insulation; power cable insulation; power cables; submarine cables; trees (electrical); accelerated aging tests; conductivity; dc stress; electric field; electric strength; electron microscopy; optical microscopy; polyethylene cable insulation; submarine power cables; sulfide trees; tree growth rate; tree shape; Cable insulation; Conductivity measurement; Dielectrics and electrical insulation; Electric variables measurement; Electron optics; Optical microscopy; Optical sensors; Sea measurements; Stress; Trees - insulation;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.654708

Filename

654708