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Comparison of electrical aging tests on EPR-insulated minicables and ribbons from full-sized EPR cable

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The results of electrical endurance tests performed on ribbons cut from full-sized EPR cables are compared with those obtained by tests performed on cable models, having the same insulation as the full-sized cable. It is shown that the voltage endurance coefficient estimated on the basis of the short-term life test data has approximately the same value for cable models and ribbons, according to both inverse-power and exponential models. However, the surface roughness resulting from cutting the specimens can affect the result at high stresses

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IEEE Transactions on Dielectrics and Electrical Insulation  (Volume:2 ,  Issue: 6 )