the overhead line exposed outdoors, will be affected by climate and environmental conditions.
Lightning, fog, wind, rain and snow, high temperature, cold, floods, smoke and dust, fiber will be from different aspects, such as a threat to overhead line.
In terms of fault phenomena, cable fault include mechanical damage, lead crack and burst, terminal head flashing, terminal, or in the middle joint, insulation breakdown, perforation of the metal sheath corrosion failure.
In terms of the cause of the accident, cable fault include external force damage, chemical corrosion and electrochemical corrosion, lightning, flood, pests and other natural disasters and inappropriate, improper maintenance of construction personnel negligence categories, etc.
lightning line, has the potential to insulator flashover or breakdown.
In order to improve the lightning resisting level of line, to prevent lightning accident, can furnish ground wire or lightning rod to prevent the wire direct lightning strike.
Can be installed tube type of surge arrester, avoid the harm of lightning invasion wave.
You can configure the automatic reclosing, prevent lightning flashover caused power outage or other discharge. Can be erected at neutral point arc suppression coil, in order to reduce the danger of lightning or other causes of earthing.
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