Antenna for detection of partial discharges in a chamber of...

G - Physics – 01 – R

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G01R 31/12 (2006.01) G01R 31/16 (2006.01)

Patent

CA 2517383

The sensor (15) for partial discharges in a chamber (1) of an electrical instrument, filled with a dielectric fluid, comprises an antenna (16, 18) sensitive to the electromagnetic waves generated by said partial discharges. Within said sensor, the antenna is formed by two electrodes separated by a dielectric resonator (17). By means of said arrangement the sensor has an improved sensitivity to ultra-high frequencies whilst having dimensions significantly smaller than those of a conventional antenna for ultra-high frequencies.

Le capteur (15) de décharges partielles dans une cuve (1) d'appareillage électrique remplie d'un fluide diélectrique, comprend une antenne (16, 18) sensible aux ondes électromagnétiques générées par ces décharges partielles. Dans ce capteur l'antenne est formée par deux électrodes séparées par un résonateur diélectrique (17). Avec cet agencement, le capteur présente une sensibilité améliorée dans les ultra-hautes fréquences, tout en ayant des dimensions nettement inférieures aux dimensions d'une antenne classique destiné aux ultra­hautes fréquences.

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