Description: The 3-phase, 3-display voltmeters read phase-to-phase voltage of all the three phases as per the selection made by the selector switch. Selection of phase shall be indicated by glow of corresponding LED. Three-phase voltmeters indicate the voltage of R-Y, Y-13 and B-R phases. They are available in three models like continuously reading phase-to-phase voltage of all the three phase, reading phase to phase voltage of all the three phases as per the selection made by the selector switch indicated by glow of corresponding LED and display of all phase to phase voltages of all the three phases automatically at regular intervals of 10-20 seconds indicated by glow of corresponding LED.