Apparatus and method for distinguishing between energized and induced voltages on high voltage power lines

摘要

Apparatus for detecting whether a conductor at high voltage is energized or is carrying induced voltage only, comprising an elongated tube having an electrical contact on a first end for contacting the conductor, a string of high voltage capacitors connected in series running substantially the length of such tube, means for making a connection to ground, and a milliammeter positioned at the other end of the tube and connected between ground and the string of capacitors. The device is characterized by an expulsion cap which is easily expelled from said tube upon gas build up within the tube due to capacitor burn out. Relatively high current readings are obtained when the tested line is directly energized, the lines carrying induced voltage only producing relatively low current indications.