Assessment of creeping discharge initiated by metal particles
on the silicone rubber/XLPE interface in cable joints

Wen-Zhi Chang – Fei Du – Jian-Gang Bi – Shuai Yuan – Yan-Peng Gong – Yuan Yang

   Creeping breakdown caused by metal particles on the silicone rubber/XLPE interface of prefabricated cable joints often happens. Study on the development process of such insulation defect-led partial discharge (PD) can serve as a basis for the assessment of its severity level. In this paper, metal particles are sandwiched on the rubber/XLPE interface of a 35 kV prefabricated cable joint to simulate a creeping defect.

Keywords: cable insulation, power cable connecting, interface phenomena, silicone rubber, cross linked polyethylene insulation

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