Abstract
Engineering Lifetime Model of Crosslinked Polyethylene under Electrical and Thermal Stresses
Highlights
Crosslinked polyethylene (XLPE) was invented almost half a century ago.(1) It is used as the insulating material of power and telecommunication cables, which are called XLPE cables
From the experimental results of the XLPE lifetime under electrical field stresses at specific temperatures in Fig. 6, an inflection point was found at a certain electrical field stress (Ed)
We have presented an effective approach for determining the lifetime of XLPE under electrical and thermal stresses
Summary
Crosslinked polyethylene (XLPE) was invented almost half a century ago.(1) It is used as the insulating material of power and telecommunication cables, which are called XLPE cables. The lifetime of XLPE used as power cable insulation was investigated under the influence of electrical field stress. The model parameters have no significant physical meaning, and the IPM can only be applied in the range of high electrical field stresses for aging tests. The lifetime of XLPE can be obtained by a combined stress model (CSM), as previously reported.(4,10–15) This model was derived from the physical meaning of each parameter and has high accuracy. Both the IPM and CSM require a large amount of experimental data for predicting the lifetime. This paper presents an effective engineering model for estimating the lifetime of XLPE under the influence of electrical and thermal stresses.
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