... system,building automation DW series 3-phase True Effective Value Energy Meter(RMS)DW/MDW 3-line LED display 1) Input ... range:0-360°, display phase angle and input amplitude,mini power is 1mW,apply to energy-saving equipment, production line for ... power system,factory power distribution,building automation,eg.,single/three phase,voltage/current/power,three phase voltage/ampere integrated display ...