Study on Impedance Characteristics of Moisture Ingress in Cable Joint and Its Detection Method

Cable joint is one of the most vulnerable parts of power cables. Moisture ingress with joints is a common defect of medium-voltage cross-linked cables. If not repaired timely, it will develop into premature failure of cable. This paper studies the impedance characteristics after moisture ingress into cable joints and their detection method. Based on the theoretical knowledge of time domain reflect...