Has the lightning arrester installed in the system been damaged or degraded? Can a lightning protection device that has been in use for many years still be relied upon? If the system voltage is 380V, is the selected lightning arrester rated correctly for this application? The RC data is only marked on the arrester. What is the actual clamping voltage during a surge event? To check this, we can refer to the test method for the pressure-limiting SPD. By pressing the test button, the screen will display the clamping voltage and leakage current, giving us a clear indication of the arrester's performance. It’s important to verify these values regularly to ensure the system remains protected against voltage surges. Understanding the real-time response of the lightning arrester helps in making informed decisions about its maintenance or replacement. Always make sure the testing procedures are followed properly to avoid any risks.
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