DocumentCode
282728
Title
The influence of a DC test voltage on the AC performance of new and old XLPE cables
Author
Faremo, H. ; Soelberg, P. ; Ildstad, E. ; Sletbak, J.
Author_Institution
Norwegian Res. Inst. of Electr. Supply A/S, Trondheim, Norway
fYear
1989
fDate
8-12 May 1989
Firstpage
233
Abstract
The main purpose of this work was to check if DC testing of XLPE cables could be harmful to the insulation. Tests performed both on new and aged Rogowski objects and cable samples showed no detrimental effects of DC testing. Some results supported the hypothesis that if a breakdown occurs during DC testing of aged XLPE insulation the rapid collapse of voltage might reduce the dielectric strength of the remaining insulation. In samples where the longest vented water trees were found to penetrate more than 50% of the insulation wall, the DC breakdown strength was found to be 1.4-2.2 times higher than the effective AC breakdown voltage
Keywords
cable insulation; electric breakdown of solids; insulation testing; materials testing; organic insulating materials; power cables; DC testing; Rogowski objects; XLPE; breakdown; dielectric strength; power cable insulation testing; water trees;
fLanguage
English
Publisher
iet
Conference_Titel
Electricity Distribution, 1989. CIRED 1989. 10th International Conference on
Conference_Location
Brighton
Print_ISBN
0-85296-376-9
Type
conf
Filename
206073
Link To Document