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How should the selection and installation strategies of SPDs be adjusted to achieve effective surge protection?
Jul 17 , 2026
When grounding conditions are poor, the core principle of SPD application shifts from "low-impedance current discharge" to "equipotential bonding and voltage limitation," and the technical strategy is adjusted accordingly: Prioritize using SPDs with a "3+1" or "1+1" wiring configuration: For TT or TN systems, traditional SPDs may fail to operate effectively due to poor grounding if a low-impedance...
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