When a lightning wave hits a tower or lightning conductor, most of the lightning current will flow into the ground through the grounding device. If the grounding resistance is too high, the lightning current will generate a very high voltage on the top of the tower, causing the insulator to flash over and cause the line to trip.  In recent years, power outages caused by lightning strikes have...

At the 2021 annual meeting of the International Electrotechnical Commission IEC/SC37A "Low-Voltage Surge Protector (SPD)" held a few days ago, my country’s first international standard proposal in the field of IEC low-voltage surge protectors was approved. The standard name and series number is:  IEC TS 61643-05“Low voltage surge protective devices-Part 05: Monitoring device of Surge protecti...

As photovoltaic (PV) systems become more widespread, ensuring their safety and reliability is essential, especially in preventing lightning and surge interference. Low Voltage Surge Protection Device (SPD) play a critical role in PV systems by reducing the risk of equipment damage. Here are some important considerations for applying SPD in PV systems. Ⅰ. Selection of SPD PV systems have relatively...