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Cross-linked polyethylene(XLPE) is widely used as the insulation of power cables due to its good properties. Nevertheless, some inevitable defects like cracks and cavities existing in cables will initiate electrical trees which is one of the main reason leading to the breakdown of cable insulation. Thus, it is necessary to conduct the study on the effects of cavity on the growth of electrical trees...
Ethylene Propylene Rubber (EPR) with excellent dielectric properties has been widely used as cable insulation specially to be used where cables need to be moved frequently, such as in coal mine. Usually, theses cables will be bending excessively, coupled with the electric stress and thermal stress, the aging of the insulation tend to accelerate and the strength of insulation could decrease, with the...
Crosslinked polyethylene (XLPE) with outstanding high temperature performance and electrical properties has been widely used as cable insulation. Leakage current of cable is the inevitable product in the process of electric energy transmission, and the gathering of leakage current is easy to cause gas combustion, explosion of the cap and other accidents. To understand the influence of temperature...
Ethylene propylene rubber (EPR) with outstanding high temperature performance has been widely used as cable insulation. To understand the influence of temperature on the feature of EPR, a series of study has been conducted including the dielectric measurements, the breakdown voltage and PD behavior of cavities. In the experiments, the dependency of permittivity, conductivity and electric modulus on...
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