Abstract Global Wang Xiao Xiao Bian finishing the 2020 Middle Safety Engineer Q & A: line fault caused the main reason for what?,For reference!View more content please pay attention to the pro forma Global Wang Xiao Middle Safety Engineer channels, and have fun learning!
problem:
Line failure caused the main reason for what?
Q & A:
1, the wind is too large: than the wind tower mechanical strength, it will cause damage to the tower or crooked Example.And wire vibration, jumping and hitting.
2, rain affects: drizzle soiling Insulator flashover can even damage Insulator.Under long non-stop downpour, the river would surge or flash floods, caused by an accident shot down.
3, excessive snow: When the line wire line lightning severe icing, the first conductor and the tower is increased mechanical load, the wire sag excessively increased, thereby resulting in mixed or broken lines; when the wire, lightning line when the ice to come off, and because wire, lightning line jumping phenomenon occurs, thereby causing an accident mixed lines.Further, since the excessive accumulation of snow on the insulator or cross arm, thereby causing the flashover Insulator.
4, lightning affects: not only will Insulator flashover or breakdown, sometimes causing breakage or splitting wood or wood cross arms and other accidents.
5, bird damage: Birds nest or perch on the tower on the tower, sometimes Big Bird flying through the conductor, are likely to cause line
Road accidents such as grounding or short circuit.
6, the environmental pollution: in the industrial area, in particular chemical or other pollution source area region, the dust pollution or harmful gas is generated, the insulation will Insulator levels were significantly reduced, so that the flashover occurs.On wood line Insulator surface contamination due to leakage current increases, so it will cause wood, wood burning accident crossarm.Some oxidation gas strongly, it will corrode the metal tower, wires, lines, and fittings and the like lightning.
7, the temperature changes: air temperature, the wires also vary the tension.In the hot summer, since the wires elongated, sag becomes so large, it may cause discharge at the cross-cutting accident; winter in cold climates, since the wires shrinkage, reduced sag, increased stress, and may cause breakage accident.
In addition to the above, other lines caused by the accident are still many reasons to.As external influence to the accident, kite flying in the vicinity of the line, in the vicinity of the firing wire to shoot birds, digging next to the tower base and tall trees near the lines, etc..These will affect the normal operation of the line, it could cause a serious accident.
But as long as we strictly perform various operation, maintenance system, effectively make the maintenance and repair work, conscientiously implement the anti-accident technical measures to ensure the safe operation of overhead lines, such incidents can be avoided to a variety of.
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