The Terminal Electrical Comprehensive Management and Protection System (N-line Treatment Protection System, NTPS) is designed to monitor and analyze the current in the terminal circuit. It manages harmonics and three-phase imbalance based on the principles of power supply continuity and safety, protecting precision equipment by eliminating neutral line currents. The system also prevents electrical fires caused by line issues, provides over-current instantaneous protection for neutral line over-current, and offers time-limited and reverse-time-limited protection for electrical products.