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What is geodetic network monitoring? What is its technical core and engineering significance?
May 28 , 2025
Earth network monitoring is a comprehensive detection technology for grounding systems of power, railway, communication, petrochemical and other facilities. The core parameters include grounding resistance (R), conductivity (contact resistance) and soil resistivity (ρ). The grounding system forms a low-impedance path with the earth through metal conductors, discharging fault current in scenarios s...
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Basis and related instructions for lightning protection classification of buildings
Jun 04 , 2025
Buildings should be divided into three categories according to their importance, nature of use, possibility and consequences of lightning accidents, and protection requirements. In areas where lightning strikes to the ground may occur, if one of the following situations occurs, it should be classified as a Class I lightning protection building: 1. Dangerous buildings used for the manufacture,...
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How is lightning formed?
Jun 09 , 2025
1. Atmospheric ionization characteristics: According to the ionization characteristics of the atmosphere, the atmosphere can be divided into the neutral layer, ionosphere and magnetosphere. A. Neutral layer: The neutral layer refers to the atmosphere from the ground to about 60 kilometers. Under normal circumstances, there are fewer charged plasmids in this layer, which is mainly composed of neutr...
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What are the main standards for surge protection device?
Jul 03 , 2025
1. Main standards for lightning protection application design IEC 62305-1:2010/GB/T 21714.1-2015 《Protection against lightning-Part 1: General principles》 IEC 62305-2:2010/GB/T 21714.2-2015 《Protection against lightning-Part 2: Risk management》 IEC 62305-3:2010/GB/T 21714.3-2015《Protection against lightning-Part 3: Physical damage to structures and life hazard》 ...
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What's surge protection device?
Jul 10 , 2025
Surge, also known as voltage surge or surge, is a common phenomenon in power systems, usually referring to sudden current or voltage fluctuations. Such fluctuations may be caused by lightning strikes, grid failures, switch operations or other reasons. Power surges can cause serious damage to power equipment and electronic equipment, and even lead to safety issues such as fire. Surge protection dev...
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