Is it necessary to install lightning arresters for outdoor cranes?
Many people believe that the roof has been set lightning rod, we can guarantee that all of our home appliances Safety lightning protection. In fact, this view is wrong. In fact, the lightning rod can only prevent direct lightning, and can only protect the building. It will also discharge a lot of induced lightning when watching direct lightning. The lightning arrester will cause damage to the electric apparatus by invading the electric appliance at the moment along the antenna, feeder, signal line and power line. Therefore, lightning protection alone alone is not enough, we must add three lightning protection system. Three class lightning protection system refers to the building lightning protection system, floor power supply, lightning protection box and indoor lightning protection socket.
Yes. The lightning rod aims at setting up a lightning protection zone for the protected object to reduce the possibility of direct lightning stroke of the protected object. If the protected object is in the protection zone of direct lightning, the object in the area can not be directly struck by lightning. When lightning and lightning rod discharge, most of the lightning current through the lightning rod grounding device into the ground. Thus, the protective material is not damaged by current.
There are also some people who are accustomed to turning off the TV, computer and so on when the thunder begins. In fact, this method can not protect the security. Due to the sensitivity of computer and VLSI is unusually high, the lightning arresters installed even in computer facilities building, electromagnetic induction and electrostatic induction lightning strikes, still can form high voltage shock wave, the electronic equipment damaged. A thunderstorm came, it is best not to use the computer, the power is not just turn off the electrical lightning, because the ground is connected to the current strong lightning produced by electrical wires and eventually to the earth, so just turn off the electric power supply, will be through the current into the ground, so just shut the power does not guarantee complete security only, unplug the appliance plug, completely withdraw from the circuit, in order to ensure safety. In addition, in the work or many can not turn off the power supply, to ensure the safety of electricity, or need to choose a large power supply lightning protection socket.
