Abstract:-This paper presents few case studies of state diagnosis of XLPE cables using very low frequency techniques. The power cables of 22.9kV which have installation fault were assessed using VLF technique in addition to other techniques like insulation resistance and DC voltage withstand test. From the experimental results, The dielectric loss(tanδ) values of degradation of the cable(joint, knife, needle) at U 0 were 5.839, 5.526 and 6.251, respectively and all values were "further study advised". VLF PD measuremen… Show more
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