DocumentCode
1618614
Title
DC ageing of low density polyethylene insulation with protrusions at the electrodes
Author
Oldervoll, Froydis ; Ildstad, Erling
Author_Institution
Dept. of Electr. Power Eng., NTNU, Trondheim, Norway
fYear
2001
fDate
6/23/1905 12:00:00 AM
Firstpage
456
Lastpage
459
Abstract
The ageing process in a polymeric insulation under HVDC conditions may be accelerated in the presence of protrusions. In this work low density polyethylene insulation with needle-shaped electrodes was subjected to electrical and thermal ageing. The polarity of the applied DC field was either kept constant or reversed every 5 minute. After 4 weeks ageing with constant polarity the DC breakdown level was unaltered or even improved. Ageing with polarity reversals reduced the DC breakdown level of LDPE with antioxidant by 25%
Keywords
ageing; electric breakdown; polyethylene insulation; space charge; DC ageing; antioxidant; electrical ageing; low density polyethylene insulation; needle-shaped electrodes; polarity; protrusions; thermal ageing; Aging; Cables; Circuit testing; Electric breakdown; Electrodes; Insulation; Needles; Polyethylene; Temperature; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Solid Dielectrics, 2001. ICSD '01. Proceedings of the 2001 IEEE 7th International Conference on
Conference_Location
Eindhoven
Print_ISBN
0-7803-6352-3
Type
conf
DOI
10.1109/ICSD.2001.955692
Filename
955692
Link To Document