Within a certain range, the taller the building, the more likely it is to be struck by lightning. Under normal circumstances, high-rise residential buildings are equipped with lightning rods, so lightning strikes will not occur. However, you will also be harmed by lightning under the following circumstances. Below, Hubei Power Supply Lightning Protector will introduce it to you.
The protection range of a lightning rod generally refers to the space that can be protected by a direct lightning strike. As long as it is within its protection range, and if the lightning rod is always in good condition, the building will not suffer direct lightning strikes. The protection range of a lightning rod depends on the height and shape of the building, especially the height of the lightning rod itself or the total height of the building where the lightning rod is installed. Generally speaking, the higher the lightning rod is installed, or the higher the lightning rod itself, the greater its protection range.
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The protection range of lightning rods is often determined through calculation. In short, a single lightning rod adopts a 45-degree angle of protection range, and its ground protection radius is equal to 1.5 times the height of the needle.
When the grounding resistance of the lightning rod is too high or the grounding wire is mechanically damaged or corroded.
When the telephone wires and light wires of high-rise residential buildings are installed too close to the lightning rod and its grounding conductor.
When TV antenna towers, billboards, and flagpoles are higher than lightning rods without independent lightning protection grounding systems.
Watch TV or open the window to enjoy the rain during thunderstorms.
While working on the roof during a thunderstorm.
So how to protect high-rise residential buildings from lightning?
All high-rise residential buildings must install lightning rods. Before summer every year, the lightning protection equipment must be inspected and its resistance value measured. The shared TV antenna tower should be installed with an independent lightning protection system, or it can be connected together with the building lightning protection system. Residents' light wires and telephone lines should keep a safe distance of not less than 50 centimeters from the lightning protection wires. Never tie telephone lines to lightning rods. During thunderstorms, do not open windows to watch the rain or watch TV. Do not perform open-air work on the roof. Users who have not installed a shared TV antenna should not install their own TV antenna casually. If such an antenna is installed higher than a lightning rod or on a high building without a lightning rod, it will lead to lightning entering the house, so be extra careful.
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1. The TV antenna and shared antenna are best not to protrude from the roof;
2. If it is necessary to protrude from the roof, it is best to install a grounding switching gate at the entrance of the antenna feeder. When thunderstorms are frequent, the antenna is switched to the grounding position, and its grounding resistance should be less than 10 ohms. In special thunderstorm areas, such as residential buildings in mountainous areas, the antenna plug should be unplugged and left outside;
3. The antenna feeder should use a metal shielded wire or pass the feeder through a metal tube and lead it down. Arresters and zinc oxide varistors should be placed at the upper amplifier, mixer and lower TV. These pipelines and devices must be well grounded.
4. It is best to stop using your home computer during a thunderstorm and cut off the power supply. If it must be operated during thunderstorms, lightning protection measures must be taken.
5. Households with many household appliances are best to prepare a fire extinguisher to be prepared.
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