JKWV-12A series of low-voltage reactive power compensation controllers, the man-machine dialogue is controlled by a 7-inch touch screen, which is simple and convenient. The machine consists of a touch screen, reactive power controller, GPRS protocol, power module, local upgrade interface, etc.; The control set is integrated, and the reactive power compensation is 12 control outputs. The machine is equipped with a GPRS interface as standard, which is convenient for accessing the 4G network. Logging into the background can remotely view the operation and maintenance system in real time. The provision of operating big data provides a guarantee for the safe operation and maintenance of the system.