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What are the requirements for the installation of the connecting wires at both ends of the SPD? Apr 08 , 2025
Regardless of TN system or TT system, the connection wires at both ends of the SPD connected to the live conductor and PE line should be short and straight. The IEC standard stipulates that the total length of the SPD connection wire should not exceed 0.5m. This is because the lightning impulse current has high-frequency characteristics, and the lightning impulse overvoltage applied to the ...
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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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