Title :
Investigation of DC threshold of polyethylenes as a tool for insulation characterization
Author :
Montanari, G.C. ; Mazzanti, G. ; Fabiani, D. ; Albertini, M. ; Perego, G.
Author_Institution :
Dept. of Electr. Eng., Bologna Univ., Italy
Abstract :
Dc space-charge measurements, performed by PEA, are used to estimate the electrical threshold in XLPE and modified XLPE-based materials. In addition to threshold, a quantity is proposed for the characterization of a material, in relation to its expected voltage endurance. This quantity is associated to the slope of the charge vs field plot coming from space-charge measurements. The different behavior as regards space-charge accumulation in the tested materials and its relevance to insulation endurance is discussed. The quantities presented in this paper are useful for the electrical characterization of insulating materials candidates for DC high-field applications
Keywords :
XLPE insulation; insulation testing; space charge; DC high-field applications; DC space-charge measurements; DC threshold; PEA; XLPE; electrical threshold; insulation characterization; modified XLPE-based materials; polyethylenes; space-charge accumulation; voltage endurance; Charge measurement; Conducting materials; Current measurement; Dielectric materials; Dielectrics and electrical insulation; Electric variables measurement; Life testing; Materials testing; Performance evaluation; Threshold voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1999 Annual Report Conference on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-5414-1
DOI :
10.1109/CEIDP.1999.807867
