Voltage and current detectors for medium or HT electric power lines - uses insulated enclosure with chambers for capacitive voltage detector and current detection coil.

摘要

The detectors are housed in an internal chamber (110) in an insulated enclosure (100). The potential measurement is by means of a capacitance (210) formed by a dielectric support of controlled thickness and having two electrodes (214,216). The capacitance is fixed in the internal chamber, and is preferably formed from a double sided printed circuit. The enclosure has a flat cap (230) that is electrically connected to the electric line. An grounded screen (220) is between the end cap and the capacitance. The housing also accommodates a current measuring coil (310) enclosed by a conductive shielding screen (350). A processing circuit is incorporated inside or outside the enclosure. ADVANTAGE Improved current and voltage measurement, integrated into isolator.