Study on drying performance of high voltage cable buffer layer material

In order to study the failure mechanism of high-voltage cable buffer layer caused by moisture and performance material after immersion drying, according structure size 110 kV XLPE cable, requirements for separation distance between corrugated aluminum sheath insulating outer shield before change resistivity were calculated, influence on ablation was analyzed. The test platform built, properties two kinds materials without water drying tested, including semi-conductive water-blocking tape tape. results show that when content large, increases, which reduces allowable more likely cause discharge layer. in removed at 70 °C, with thickness, weight, content, elongation break, breaking strength volume can be recovered, verifies heating method is feasible removal from