Title :
Electrical conduction measurements in aged cables and compensation effect
Author :
Montanari, G.C. ; Motori, A.
Author_Institution :
Istituto di Elettrotecnica Ind., Bologna Univ., Italy
Abstract :
The presence of a compensation effect in the electrical conductivity of aged XLPE-insulated cable models is investigated. It is shown that the logarithm of the pre-exponential term and the thermal activation energy of the steady DC conduction process are linearly related, according to the compensation effect, when cable models aged for different times and under different stresses are considered. This result improves when the actual steady DC conductivity, estimated by an appropriate model, is taken into account
Keywords :
XLPE insulation; ageing; cable insulation; electrical conductivity; thermal stresses; aged XLPE-insulated cable models; aged cables; compensation effect; electrical conduction measurements; electrical conductivity; logarithm; pre-exponential term; steady DC conduction process; stresses; thermal activation energy; Aging; Cables; Conducting materials; Conductivity measurement; Electric variables measurement; Life testing; Temperature dependence; Thermal conductivity; Thermal stresses; Voltage;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1995. ICSD'95., Proceedings of the 1995 IEEE 5th International Conference on
Conference_Location :
Leicester
Print_ISBN :
0-7803-2040-9
DOI :
10.1109/ICSD.1995.522942
