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  • SPD Maintenance: Why Surge Protective Devices Cannot Be Installed and Forgotten

    SPD Maintenance: Why Surge Protective Devices Cannot Be Installed and Forgotten

    Aug , 31 2026
    Quick Answer A Surge Protective Device (SPD) cannot be considered permanently effective simply because its indicator window remains green. The indicator only shows part of the device status. Actual protection performance also depends on installation quality, grounding conditions, upstream protection coordination, wiring length, and previous surge events. During lightning strikes, grid switching, o...
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  • Why a Running Fan Does Not Mean Your Power Supply Cooling Is Working Properly

    Why a Running Fan Does Not Mean Your Power Supply Cooling Is Working Properly

    Sep , 02 2026
    Quick Answer A running fan only shows that the fan is operating. It does not mean the power supply is effectively cooled. Actual cooling performance depends on airflow, air pressure, ventilation design, ambient temperature, and installation conditions. Long-term high temperature can accelerate component aging, reduce available power capacity, and shorten power supply lifespan.   Key Takeaways...
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