Transmission line electroscope

The utility model discloses a transmission line electroscope, include insulating bar and test the motor and construct, insulating bar includes outer pole and interior pole, the interior endwise slip that can follow outer pole of outer pole is located to interior rod cover, it pushes away the button of connecting in the elastomer to be equipped with elastomer and top in the interior pole, be equipped with the first locating hole that can supply the button to come in and go out on the interior pole wall, be equipped with two at least and button complex second locating hole on the outer pole, outer pole upper end be fixed with inseparable cover establish including the outer sliding sleeve of pole, the motor structure is tested in the connection of interior pole upper end, the lower extreme overcoat has the gleitbretter, the utility model discloses a transmission line electroscope, outer pole and interior pole make insulating bar form retractable structure, use length that can according to actual need adjustment insulating bar to can adapt to the maintenance requirement of different electric pressures, provide convenience for maintenance work, improve maintenance efficiency.