Lightning damage example: in the summer of 2002, a subway train near Longyang Road station was hit by thunderstorm, causing the Shanghai subway line 2 to be halt for 20 minutes.
According to the lightning protection experts, city power supply system, computer network, telephone network and cable television network, are run by the integrated circuit chip, the normal operation of the chip when the voltage between 5 volts to 12 volts, the network operator must remove the body of static to burglary operation. If there is no perfect lightning protection system and 1 kilometers out of mine, these weak systems will be induced by the surge current and be struck by lightning.
The increasingly dense network of computer information, communication, subway, electric power and other networks is becoming the main object of lightning attack. The lightning protection system should strengthen the prevention of such lightning disasters. Liu Ji, a senior engineer engaged in high voltage technology and lightning protection research, said, "people used to say that lightning is a thing in the sky, and we cannot manage it on the ground. Now the technology is mature, we should not only manage, but also have to manage it well. "

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