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What are the main reasons for the continuous increase in the leakage current of varistor (MOV)? Apr 16 , 2025
There are three main reasons why the leakage current of the MOV in the SPD continues to increase and thermal breakdown occurs during the normal working life: 1. The frequency and amplitude of surge overvoltage at the SPD installation site are large, causing the MOV's inherent ampere-second resources to be exhausted prematurely and enter the degradation failure stage. ...
- SPD device
- SPD protector device
- SPD lightning protection
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What is geodetic network monitoring? What is its technical core and engineering significance? Apr 29 , 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 scen...
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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...
- jinli lightning protection device
- jinli spd
- Surge Protection Device
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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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