Lightning protection measures for electrical and electronic equipment are essential

[Office Partner Information Channel] Lightning strike is a serious meteorological disaster that is often overlooked by people. In real life, the probability of each of us being struck by lightning is very low, and it is basically negligible. However, there are many situations in which weather phenomena such as lightning are encountered. Globally, the frequency of lightning is very high, there are hundreds of lightnings per second; more than 8 million lightnings per day; an average of more than 3 billion lightnings a year; indirect deaths due to lightning strikes The number of people reached tens of thousands. At the end of the 20th century, the United Nations International Decade for Disaster Reduction organized lightning disasters as one of the top ten natural disasters.

China is a region where lightning disasters occur frequently. There are 21 provincial capital cities with thunderstorm days in the country for more than 50 days, up to 134 days. There are nearly 10,000 lightning disasters every year, resulting in 3,000 to 4,000 casualties and direct economic losses of several billion to hundreds of billions.

Indirect lightning strikes are more extensive and severe than direct lightning strikes.

Direct lightning strikes are destructive, but the probability is very low, and the harm of indirect lightning strikes is more extensive and serious. Direct lightning is a series of destructive effects such as the rapid discharge between the charged cloud layer (Thundercloud) and buildings, other objects, the earth or lightning protection devices, and the electrical, thermal or mechanical forces that accompany it. Mainly damaging buildings, electronic equipment and people in buildings. The peak voltage of a direct lightning strike can usually reach tens of thousands of volts or even millions of volts, and the current peak can reach several tens of KA or even hundreds of KA, which is very destructive.

Inductive thunder in indirect lightning strikes refers to all the objects on the ground when the thundercloud comes, especially the conductors. Due to static induction, a large number of trapped charges of opposite thunder electrodes are collected, in the thundercloud to the ground or to another thundercloud. After the flash discharge, the charge in the cloud becomes a free charge, which produces a very high electrostatic voltage (induced voltage). The overvoltage amplitude can reach tens of thousands to hundreds of thousands of volts. This overvoltage often causes construction. Wires inside the object, metal conductors with poor grounding, and large metal equipment discharge cause sparks, which may cause fire, explosion, personal safety or damage to the power supply system.

Are you right off lightning protection equipment?

In today's society, with the continuous increase of buildings, the rapid growth of high buildings, the high current stability requirements of electrical and electronic equipment, the lightning protection of buildings, communication base stations, factory mines, electrical and electronic equipment can not be ignored. In different situations, lightning protection equipment is also different. Here, the umbrella protection of Shenzhen Xinhesheng Technology Co., Ltd. provides lightning protection equipment for users and provides professional lightning protection equipment and professional lightning protection. solution.

For the protection of direct lightning strikes, lightning rods, lightning protection belts, lightning protection lines, lightning protection nets or metal objects are usually used as lightning receptors to receive the lightning current and guide them through the metal conductors as the down conductors to the ground. The grounding device acting on the flow is then vented to the ground. Among them, direct lightning protection for different buildings, including ordinary lightning rods, optimized lightning rods, early discharge lightning rods and current limiting lightning rods, in the lightning protection grounding project, can increase the resistance of the ground with the necessary steel and long-term anti-corrosion reducer The value that effectively channeles the current that is introduced into the ground.

For the protection of indirect lightning strikes, it can be subdivided into two parts: power supply lightning protection and signal lightning protection. Power supply lightning protection includes three-level power supply lightning protection, which can be based on the power distribution in the building and the specific conditions of the electric and electronic equipment. Different levels of power supply lightning protection, specifically related to lightning protection equipment, single-phase power supply lightning protection module, three-phase power supply lightning protection, 48V power supply lightning protection module, 690V power lightning protection module, 1000V power supply lightning protection module for photovoltaic power generation and A three-phase power lightning protection module for direct current. The signal lightning protection device can be subdivided into computer network lightning protection device, control signal lightning protection device, video signal lightning protection device, audio signal lightning protection device and antenna feeder lightning protection device according to specific application conditions. Depending on the specific electrical and electronic equipment, rack-mounted computer network lightning protection, control signal lightning protection and video signal lightning protection can also be used. Of course, in actual situations, it can also be combined according to different lightning protection requirements, including two-in-one lightning protection device and three-in-one lightning protection device.

Lightning protection, high efficiency protection of life and property

Faced with such severe lightning damage, developing the lightning protection market is not only the need to protect people's lives and property, but also an inevitable requirement for economic construction and social development. The strength of lightning disaster prevention capabilities is related to social public safety issues and to the improvement of comprehensive urban competitiveness. Either government agencies, high-rise buildings, and related electrical and electronic equipment companies must conduct effective lightning protection, and choose the high-quality lightning protection equipment that suits their needs.

Source of information: Internet