The JJTP2-63A Automatic Phase Selector is an intelligent changeover switch that automatically selects the best available phase and protects electrical systems from over-voltage, under-voltage, overcurrent, overheating, and phase failure. It features adjustable protection settings, digital voltage/current display, user-defined phase priority, and a self-reset function. Suitable for single-phase loads up to 63A, it ensures continuous, safe, and stable power supply