The RIZNER-APS II system (ie RIZNER arc protection system) is a new generation of arc protection system designed for the RIZNER-EagleEye system and redesigned for many years of market and customer feedback. The RIZNER-APSII system consists of a main control unit, a power module, an arc sensor, and an optical fiber line. The system adapts to various operating modes of medium and low voltage busbars, and is flexible and stable.