What is the application and development of lightning protection technology in recent years?

Let's talk about it from a few aspects. Wax ruler.

1. Direct lightning: At present, foreign technologies are lightning rods and lightning drives discharged in advance, these principles are easy to search on the Internet, but there is no recognition in China for the time being, because its technology does have a certain instability, and the domestic is still Franklin-style;

2. Power surge protector: Now the domestic specifications have more requirements for T1, and the technology of such products is still better in China. ABB, Phoenix, DEHN, etc. have products with very good safety and parameters, and the domestic product parameters are very high, but they are not very credible, and the safety should be inferior to foreign technologies, such as transient overvoltage, short-circuit interrupted current value, etc.;

3. Signal lightning protector: the concept of domestic and foreign countries is different, such as the IN value of the network lightning protector DEHN is unqualified in China. Foreign products are classified more finely and have higher requirements for users.

However, there is a signal surge protector launched by Anxin technology in Shenzhen, which has a full-line blocking function, which is said to greatly improve the protection effect of the equipment, if you understand the principle of the signal lightning protector, you will know that the difficulty is in the **, which is relatively novel, and the signal lightning protector at home and abroad has not seen this aspect of the introduction for the time being.

Hard typing, refining ten years of experience, hope!

The hazards of lightning include three aspects:

1.Direct lightning strikes (direct lightning strikes), which are what we commonly refer to as lightning. Direct lightning has three major effects: thermal, electrical and mechanical effects, and the lightning energy is huge, which can instantly cause physical damage and electric shock damage such as damage and collapse of the hit object.

2.Induced thunder, during the formation of thunderclouds, due to the accumulation of charges in thunderclouds and the sharp decrease of charges in thunderclouds when lightning occurs, a wide range of electrostatic induction and electromagnetic induction phenomena will be formed, resulting in high potential (strong voltage) and instantaneous impulse current (surge) in metal conductors within the influence range of lightning (within a radius of 2km where lightning occurs). The main hazards that may be caused are electric sparks in adjacent conductors caused by potential differences, and power surges cause breakdown of power and signal lines, resulting in short circuits in the lines, and intrusion into electrical equipment and equipment damage.

In particular, it is more harmful to low-voltage electrical systems and electronic information systems.

3.Conduction of lightning: When lightning strikes ground objects, especially buildings, lightning is transmitted outward through the metal pipes, power and signal lines entering and exiting the building (about 50% of all lightning currents) during the discharge of lightning current, thus causing harm to the lines and facilities in other buildings.

The research methods of lightning protection technology in different environments are as follows:

1. When using raw materials, try to use high conductivity, such as copper or galvanized pipe with a diameter of 25 mm, the upper head of the lightning receiver should be sharpened, the lightning rod (down lead) should be selected with a galvanized pipe diameter of an appropriately large diameter, and the grounding body should be a metal plate with high conductivity, which should be properly buried deep (trapped deep burial soil moisture and small resistance), and at the same time avoid stepping voltage, which is very good for lightning rod resistance.

2. (1) Change the Shi side, and change some Shi soil with high conductivity around the grounding body.

2) Add drag reducing agents, such as fine graphite, curing agents, lubricants, etc.

3) External grounding method, connecting the connection pool body to natural grounding or artificially laid spoke-assisted grounding, etc.

4) Use conductive concrete.

5) Add salt method, add salt around the ground to reduce resistance.

6) Drilling deep burial method, etc.