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Thermal and Electrical Stresses Effect on the XLPE-EPR DC Cable Joints Insulations
This paper deals with the thermal, electrical and combined thermo-electrical ageing of some XLPE and EPR flat samples. The samples were aged for different ageing times and electric fields. Before and after ageing, the electrical properties (e.g. electrical conductivity and permittivity) were measured. The physical modifications of the specimens were analyzed, also.Combined stresses (electrical and thermal) lead to significant variations for the specimens properties, compared to the variations caused by uni-factor stresses. For the electrical and thermo-electrical stresses, color changes of the specimens and thermal breakdown occur.
Author(s):
Cristina STANCU
University Politehnica of Bucharest
Romania
Petru NOTINGHER
University Politehnica of Bucharest
Romania
Lucian TARANU
University Politehnica of Bucharest
Romania
Adelina CERNAT
University Politehnica of Bucharest
Romania
Alexandra CONSTANTIN
University Politehnica of Bucharest
Romania