Aug. 08, 2018
1) external force injury. Cable laying and installation of non-standard
construction, easy to cause mechanical damage; buried cable in the civil
construction is also very easy to damage the operation of the cable. Sometimes,
if the damage is not serious, it will take months or even years to lead to the
complete breakdown of the damaged parts, and sometimes the serious failure may
occur, which directly affects the safety production of the unit.
2) the insulation is dampened. This is also a common occurrence, usually in
the cable joints where burying or draining pipes are located. For example, the
disqualification of the cable joint and the joint under the humid climate will
make the joint enter into or mix with the water vapor. The water branch is
formed under the action of the electric field for a long time, and it will
damage the insulation strength of the cable and cause the failure.
3) chemical corrosion. The cable is directly buried in the area with acid
and alkali, which often causes the armour of the cable, the lead skin or the
outer protective layer to be corroded. The protective layer has been corroded by
chemical or electrolytic corrosion for a long time, resulting in the failure of
the protective layer and the decrease of the insulation, and the cable
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