1, cable internal three-phase core line occurs between each other short circuit fault, or one of the relative cable short circuit fault, will produce very large heat, make the fault place burst.
2, such as insulating layer particles, impurities, bubbles and the like, or have external mechanical damage.
3, check whether the cable is bent too much to hurt the cable.
4, bending radius is too small, mechanical external damage, DC resistance test ion release, rated current overload.
We think that if the cable system often has a blasting fault, the cable line construction, operation, maintenance and management of the major problems, should be paid attention to, in the repair work completed, should seriously find out the reasons and to eliminate, to avoid the recurrence of the shooting accident.
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