The High voltage Detector HV-132 is a safety device used to verify that the overhead line is not LIVE prior to earthing . It is designed for 11kV to 132kV AC 50 Hz overhead lines in HV switch yards, transmission lines, power plants and similar installations. It is powered by a single 9V battery. The HV detector starts annunciation with flashing Red LEDs and buzzer beeps indicating that the line is LIVE and not safe to earth and carry on any operations