Frequent grounding faults in distribution networks not only endanger personal and equipment safety but also severely reduce power supply reliability and may trigger fires in urban areas, towns, rural areas, forests, grasslands, mountainous regions, and power cables. Currently, some existing distribution terminals lack single-phase grounding fault detection functionality. Dongfang Electronics Corporation has developed a single-phase grounding alarm device based on the ΔI_PAM principle (three-phase current sudden variable phase asymmetry principle, requiring only ABC three-phase currents), enabling single-phase grounding function upgrades for existing 10kV distribution network equipment without power interruption.
