Thunder is divided into direct lightning, static induction mine, electromagnetic induction mine and ball mine. Lightning has the characteristics of large lightning current amplitude, large lightning current steepness, and high lightning impulse over-voltage. Lei is made into: destruction of facilities or equipment, large-scale remuneration, fire or explosion, and it may directly injure humans and animals. Therefore, wireless monitoring equipment that has been in the wild for a long time needs more safety management for lightning protection.
And all kinds of lightning protection buildings, especially buildings that are in danger of fire or explosion, and buildings that are vulnerable to lightning strikes, facilities or stacking materials that are likely to be struck by lightning and that are likely to suffer severe lightning strikes (such as loading and unloading platforms, open air) Oil tanks, open air tanks, etc.); high-voltage overhead power lines, large-scale construction sites or wireless monitoring equipment in mountain forests, power plants and substations shall all take measures to prevent direct lightning strikes. Buildings with a high risk of fire and explosion should be protected by induced lightning protection. Transformer rooms and buildings with explosion hazards should take measures to prevent lightning surges from entering the room.
Lightning protection measures <br> <br> Depending on the object, direct lightning, thunder and lightning induction, lightning invasion wave shall take appropriate security measures.
(1) Direct lightning protection measures:
1 Lightning rods are used to protect industrial and civil high-rise buildings and power plants, external power distribution devices of transformer substations, and individual sections of transmission lines. During the process of extending the lightning pilot circuit to the ground, they will gradually shift due to the influence of the lightning rod distortion circuit. And hit the lightning rod, thus avoiding the possibility of lightning being directed to protected wireless monitoring equipment and destroying protected wireless monitoring equipment and buildings. It can be seen that the lightning rod is actually a lightning lead, which leads the lightning to itself, thereby protecting other wireless monitoring equipment from lightning strikes.
2 Lightning conductors: Lightning conductors are also called overhead ground wires. They are installed along the line at the top of the tower and have well-grounded metal wires. Lightning conductors are the main lightning protection measures for transmission lines. Lightning conductors are also one of the commonly used lightning protection devices for wireless monitoring equipment.
3 Lightning protection belts and lightning protection nets: Metal grids laid on buildings that are easily exposed to lightning strikes along corners, ridges, corners and eaves are mainly used for protecting tall civil buildings. Therefore, wireless monitoring equipment installed indoors is also used. This type of lightning protection device can be used.
(2) Lightning induced protective measures:
Lightning induction can also generate high impact voltages, causing explosions and fire accidents. To prevent high voltages caused by lightning induction, the metal equipment, metal pipes, and structural steel bars in the building should be grounded. In order to prevent parallel pipe induction, it should be connected with metal wire at a certain distance. When the distance between the pipeline and the metal equipment or metal structure is less than 100 mm, the metal wire bridging is also applied. In addition, pipe joints, elbows and other contacts are not reliable, but also use metal wire bridging. Effectively reducing the damage from lightning can indirectly protect wireless surveillance equipment.
(3) Protection measures against lightning wave invasion:
Thunderstorms caused by thunder and lightning invading waves are many. Especially in electrical systems, such accidents account for more than 70% of mine accidents. The main measures are: valve arresters, gap protection methods, and tube arresters. Because the wireless monitoring equipment will not be completely wireless, protecting the electrical system can effectively protect the power source of the monitoring equipment.
And all kinds of lightning protection buildings, especially buildings that are in danger of fire or explosion, and buildings that are vulnerable to lightning strikes, facilities or stacking materials that are likely to be struck by lightning and that are likely to suffer severe lightning strikes (such as loading and unloading platforms, open air) Oil tanks, open air tanks, etc.); high-voltage overhead power lines, large-scale construction sites or wireless monitoring equipment in mountain forests, power plants and substations shall all take measures to prevent direct lightning strikes. Buildings with a high risk of fire and explosion should be protected by induced lightning protection. Transformer rooms and buildings with explosion hazards should take measures to prevent lightning surges from entering the room.
Lightning protection measures <br> <br> Depending on the object, direct lightning, thunder and lightning induction, lightning invasion wave shall take appropriate security measures.
(1) Direct lightning protection measures:
1 Lightning rods are used to protect industrial and civil high-rise buildings and power plants, external power distribution devices of transformer substations, and individual sections of transmission lines. During the process of extending the lightning pilot circuit to the ground, they will gradually shift due to the influence of the lightning rod distortion circuit. And hit the lightning rod, thus avoiding the possibility of lightning being directed to protected wireless monitoring equipment and destroying protected wireless monitoring equipment and buildings. It can be seen that the lightning rod is actually a lightning lead, which leads the lightning to itself, thereby protecting other wireless monitoring equipment from lightning strikes.
2 Lightning conductors: Lightning conductors are also called overhead ground wires. They are installed along the line at the top of the tower and have well-grounded metal wires. Lightning conductors are the main lightning protection measures for transmission lines. Lightning conductors are also one of the commonly used lightning protection devices for wireless monitoring equipment.
3 Lightning protection belts and lightning protection nets: Metal grids laid on buildings that are easily exposed to lightning strikes along corners, ridges, corners and eaves are mainly used for protecting tall civil buildings. Therefore, wireless monitoring equipment installed indoors is also used. This type of lightning protection device can be used.
(2) Lightning induced protective measures:
Lightning induction can also generate high impact voltages, causing explosions and fire accidents. To prevent high voltages caused by lightning induction, the metal equipment, metal pipes, and structural steel bars in the building should be grounded. In order to prevent parallel pipe induction, it should be connected with metal wire at a certain distance. When the distance between the pipeline and the metal equipment or metal structure is less than 100 mm, the metal wire bridging is also applied. In addition, pipe joints, elbows and other contacts are not reliable, but also use metal wire bridging. Effectively reducing the damage from lightning can indirectly protect wireless surveillance equipment.
(3) Protection measures against lightning wave invasion:
Thunderstorms caused by thunder and lightning invading waves are many. Especially in electrical systems, such accidents account for more than 70% of mine accidents. The main measures are: valve arresters, gap protection methods, and tube arresters. Because the wireless monitoring equipment will not be completely wireless, protecting the electrical system can effectively protect the power source of the monitoring equipment.
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