About 10kV overhead lines, single-phase ground fault conditions are more.
Including thunderstorm weather, air humidity being too large, and other conditions, by line breakdown, joint fusing, corrosion, and other issues caused by damage, including single-phase disconnection caused by damage.
External forces, such as mechanical damage caused by damage, vehicle impact, high car hanging wire, foreign objects caused by the collapse of the pole, and so on, are common problems.
Lightning, the number of overhead lines more and more, increasing the frequency of lightning accidents, urban construction, lightning protection facilities, and more facilities.
The corresponding distribution lines are generally not affected by the negative impact of lightning.
But the line covering a wide area, including the field, hillside, and other areas, resulting in the overall scope of the damage caused by the location of the impact, easy to becomes a lightning current channel area.
Practice shows that the overhead power line of insulation problems than the bare cable.
When the stall lightning strikes, causing a flashover accident, is in the frequency of constant current under the action of the electromagnetic force, causing the 10kV overhead line phase arc short circuit or ground insulation breakdown, resulting in ground and phase short circuits.
For more information, please consult ZMS Cable.
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