... 7.5KW),Single 220V/Three phase 380V,intelligent constant pressure water supply water pump controller: 200 Class:0.5HP-10HP ; 400 ... electrical accessories. 6 unattended, when the call after power, water pumps start automatically, constant pressure control (this feature is ... fault detection, such as the water pressure is too high, too low, too low water level alarm, communications failures, and so on ...