DEVICE TO DETECT WITHOUT CONTACT THE TENSION IN AN ELECTRIC CABLE

摘要

Device to detect without contact the tension (VDC) in an electric cable (11), wherein the electric cable (11) comprises at least a conductor (13) wrapped in an insulating sheath (14). The device comprises at least a measurement electrode (25) disposed in proximity with said conductor (13) and associated with means (26) able to induce a vibration in order to produce thereon a variation in charge correlated to the tension (V^) present in said electric cable (11). The measurement electrode (25) is disposed at a certain distance with respect to the insulating sheath (14) and forms with the conductor (13) a condenser having as armors the measurement electrode (25) and the conductor (13) itself, and as dielectric the insulating sheath (14) and the air interspace which separates the measurement electrode (25) from the insulating sheath (14).