Title :
Conduction current measurements on XLPE and EPR insulation
Author :
Bodega, R. ; Montanari, G.C. ; Morshuis, P.H.F.
Author_Institution :
HV Technol. & Manage., Delft Univ. of Technol., Netherlands
Abstract :
Electrical conduction of crosslinked polyethylene (XLPE) and ethylene propylene rubber (EPR) is studied by means of DC charging current measurements. The threshold for space charge accumulation and the DC conductivity of XLPE and EPR have been investigated at different electric fields and at different temperatures. Current-voltage characteristics show a transition from ohmic behavior to high field behavior, above a threshold value of the applied electric field. An Arrhenius-type dependence of both XLPE and EPR conductivity with temperature was found. Measurements were performed also on two-layer XLPE/EPR combinations. Based on conductivity values obtained by measurements on a single layer sample, the electric field distribution of the two-layer combination is discussed.
Keywords :
XLPE insulation; electric current; electrical conductivity; ethylene-propylene rubber; high field effects; space charge; Arrhenius-type temperature dependence; DC charging current; DC conductivity; EPR insulation; XLPE insulation electrical conduction; applied electric field threshold value; conduction current measurement; crosslinked polyethylene; current-voltage characteristics; electric field distribution; ethylene propylene rubber; high field behavior; ohmic behavior; space charge accumulation threshold; two-layer XLPE/EPR combinations; Conductivity; Current measurement; Current-voltage characteristics; Insulation; Paramagnetic resonance; Performance evaluation; Polyethylene; Rubber; Space charge; Temperature dependence;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04. 2004 Annual Report Conference on
Print_ISBN :
0-7803-8584-5
DOI :
10.1109/CEIDP.2004.1364199
