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What is the formation mechanism of the "ground potential rise"? How it cause damage to electrical and electronic equipment inside and outside the building?
Now SPD monitoring has gone far beyond simple "on/off" indications. What intelligent directions is it developing towards?
Why do signal SPDs commonly use gas discharge tubes instead of varistors as the core primary energy dissipation element?
What is the "clamping voltage" of SPD? What is the core role in SPD, and how it related to the "voltage protection level"?
What are the differences between Single-port SPD and two-port SPD?

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What is the formation mechanism of the "ground potential rise"? How it cause damage to electrical and electronic equipment inside and outside the building? Mar 19 , 2026
Ground potential rise is caused by transient high potentials resulting from lightning current entering the ground. When lightning strikes a building's lightning rod or the nearby ground, thousands to hundreds of thousands of amperes of lightning current are discharged through the grounding system. Due to the resistance and inductance of the grounding system, according to U=IR+L·di/dt, the potentia...
- JLSP surge protection device
- JLSP SPD
- JLSP surge protector
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