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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. ...
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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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All our signal loops are indoors, so why do we need to consider surge protection device?
May 14 , 2025
Although the entire data loop is installed next to the power loop, or is installed very close to the building's steel structure or lightning rod, the ground potential of the AC power supply of the communication interface equipment connected to the data loop is seriously unbalanced, so the data communication interface is easily damaged. The ways in which lightning can cause damage to electronic dev...
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