The relation between voids in XLPE insulation and electrical breakdown strength of XLPE insulated cables

摘要

Electrical defects in cross-linked polyethylene insulated cables (XLPE cable) such as voids and contaminants in XLPE or characteristics of XLPE such as crystallinity and microporosity have been investigated in relation to the electrical characteristics of XLPE cable. Very small defects which can be observed with a microscope are being investigated. The authors studied the relation between the ac breakdown strength of XLPE cables and the void size in XLPE insulation considering the discharge inception in the voids.