The MK-CM power factor controller is an advanced control device with innovative design and multiple functions. It provides precise reactive power compensation by displaying various power grid parameters, storing parameter values, and offering real-time monitoring of power grid parameters, harmonic protection, and warning functions. These features greatly simplify the analysis of fault information and monitoring of the system. Through real-time tracking and measurement of load voltage, current, and reactive power, the controller analyzes and compares this data with preset values. It automatically selects the compensation capacity that achieves the best compensation effect and issues instructions to control contactors or thyristor switchgear, enabling the switching of reactive compensation capacitors.