XLPE insulation is widely used for insulated Power cables for its good electrical, mechanical and physical properties, also simple production process, light structure, great transmission capacity, along with the advantage of convenience for installation and maintenance, not limited to the gap. But when installation and operation, if they're heavy Mechanical stress or external force makes damage to the XLPE insulation, cable sheath, or cable joints, the moisture or water may enter into the power cable longitudinal and radial. Thus the XLPE Power cable will generate a water tree under rated voltage. When the water tree grows enough then there may be permanent power branch defects on the tip, and cause XLPE insulation breakdown in a very short time and cause a power cut. So, waterproof technology makes great significance to guarantee the XLPE power cable reliability and lifetime, then there is water tree proof XLPE insulation material.
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