Title :
Current conduction instabilities in polyethylene during heat cycles
Author :
Mary, D. ; Mbarga, S. ; Malec, D. ; Boudou, L.
Author_Institution :
Paul Sabatier Univ. Toulouse, Toulouse
Abstract :
Both low density and cross-linked polyethylene 1.5 mm-thick virgin samples have been submitted to a HVDC (20 kV) at room temperature. When the steady-state current was reached, the temperature was increased up to 70degC (ramp: 0.5degC/min). After a stay at 70degC, the temperature was then reduced. During this heat treatment, the external current was recorded. Analysis of this external current revealed instabilities (peak current); these instabilities has been correlated with some changes occurring in the structure of the studied polymers and revealed by TSC.
Keywords :
XLPE insulation; electrical conductivity; thermally stimulated currents; HVDC; TSC; current conduction instabilities; heat cycle treatment; polyethylene; size 1.5 mm; steady-state current; temperature 293 K to 298 K; temperature 70 degC; voltage 20 kV; voltage insulation; Cable insulation; Dielectrics and electrical insulation; Heat treatment; Optical polarization; Polyethylene; Power cables; Protocols; Temperature; Thermal stresses; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2007. CEIDP 2007. Annual Report - Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
978-1-4244-1482-6
Electronic_ISBN :
978-1-4244-1482-6
DOI :
10.1109/CEIDP.2007.4451523
