The High Voltage Detector is a SAFETY DEVICE used to verify that the overhead line is not LIVE prior to earthing. It is suitable for 230V- 440KV supply lines. It is powered by a single 9V battery. The HV Detector is continuous monitoring type i.e. the internal circuit of the equipment is continuously powered by the battery and it keeps monitoring the voltage level at the contact electrode. As soon as the voltage at the contact electrode exceeds minimum user defined voltage level, the HV Detector starts annunciation with flashing Red LED's and buzzer beeps indicating that the line is LIVE and not safe to earth.