At present, although there are many kinds of lightning protection technology in our country, the principle is nothing more than two methods of lightning protection.
First, the split arrester uses a disconnection method to quickly disconnect the power supply during lightning strikes to protect the equipment. Advantages: simple engineering. Disadvantages: Lightning strike time is very short (calculated in nanoseconds), sometimes it is too late to completely disconnect, lightning pulse current has caused heavy losses to electrical equipment, and at the same time, people's lives and work also do not allow electrical equipment to be powered off; Obviously, it is not able to prevent lightning, and the effect can be imagined.
Second, the grounding arrester is the use of ground discharge method, the principle: the lightning current directly into the earth, to avoid electrical lightning, but the need for a sound buried line engineering. Advantages: There is almost no technical component. Disadvantages: It will cause great construction inconvenience to the installation of high-rise buildings, households with unsatisfactory discharge of high mountains and loess, etc. Under this kind of environment, the effect of releasing lightning is also unsatisfactory. Will be eroded. No one will always check whether the ground wire is corroded. Sometimes the environment is not allowed. To achieve the national standard (resistance ≤ 4 ohms), the fully qualified cost is almost several times, or even several times, the cost of the arrester itself. If there is a drawback that can solve the above problems at the same time, it is ideal.
First, the split arrester uses a disconnection method to quickly disconnect the power supply during lightning strikes to protect the equipment. Advantages: simple engineering. Disadvantages: Lightning strike time is very short (calculated in nanoseconds), sometimes it is too late to completely disconnect, lightning pulse current has caused heavy losses to electrical equipment, and at the same time, people's lives and work also do not allow electrical equipment to be powered off; Obviously, it is not able to prevent lightning, and the effect can be imagined.
Second, the grounding arrester is the use of ground discharge method, the principle: the lightning current directly into the earth, to avoid electrical lightning, but the need for a sound buried line engineering. Advantages: There is almost no technical component. Disadvantages: It will cause great construction inconvenience to the installation of high-rise buildings, households with unsatisfactory discharge of high mountains and loess, etc. Under this kind of environment, the effect of releasing lightning is also unsatisfactory. Will be eroded. No one will always check whether the ground wire is corroded. Sometimes the environment is not allowed. To achieve the national standard (resistance ≤ 4 ohms), the fully qualified cost is almost several times, or even several times, the cost of the arrester itself. If there is a drawback that can solve the above problems at the same time, it is ideal.
Aerospace&Ground Support Casters
Aerospace&Ground Support Casters
Aerospace&Ground Support Casters
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