... control three phase power saver ,save up 30% Switch : with swith to control "Auto" , "Off" ,"Manual"or small ... 3 phase energy saver three phase power saver with LED display and Microchip control, For industryPhase : ThreeRated voltage ... : 90v-400vLED Display , can see the savingRTOS embedded firmware control ... 400AMP Three phase power saver,LED,LCD display