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For relatively long cable system, the cable is subdivided into minor and major sections. The sheaths of each minor section are transposed or cross-bonded. Meanwhile the sheaths at both ends of each major section can be grounded, or only the sheaths at the sending end are grounded and at the other end are left open. When short-circuit faults occur close to the ungrounded end, the overvoltage appears...
This paper presents a case study on the failures of three 230 kV XLPE cables. These cables failed after only 4 years of service. It was found that the copper woven fibre glass (CWFG) tape and the water swellable tape had many burnt stains. The causes of these stains were analysed. It was proved from theoretical analysis and experimental investigations that there was a problem of bad contact between...
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