Method and apparatus for the verification of an electrical...

Details Method and apparatus for the verification of an electrical... Method and apparatus for the verification of an electrical...

G - Physics

01

R

G01R 31/12 (2006.01) G01R 29/14 (2006.01)

Patent

CA 2178822

A method and apparatus for verifying the condition of an electrical insulator which is placed between two live conducting elements which are separated by the insulator. The insulator has a continuous electrically insulating core that may be covered with other types of insulating material. The insulator may also be a lightening arrester consisting of stacked insulating discs. An electric field detecting apparatus is positioned at a plurality of locations along the insulator to measure the intensity of an electric field created along the insulator. At each location a detected signal value of the electric field is stored within the apparatus and all of these signals are analyzed to detect deviations from expected values of the electric field and indicative of a fault(s) along the insulator.

La présente invention concerne un procédé et un appareil permettant de vérifier l'état d'un isolant électrique (10) placé entre deux éléments conducteurs (11, 12) sous tension, qu'il sépare. L'isolant (10) comprend une âme continue (13) électriquement isolante qui peut être recouverte par d'autres types de matériaux isolants. Cet isolant (10) peut également être un parafoudre constitué de disques isolants empilés. Un appareil (18) détectant les champs électriques est placé en plusieurs points, le long de l'isolant (10), pour permettre de mesurer l'intensité d'un champ électrique (14) créé le long de l'isolant (10). A chaque point, un signal correspondant à la valeur détectée du champ électrique est stocké dans l'appareil (18) et tous ces signaux sont analysés pour permettre la détection d'écarts (17) par rapport à des valeurs attendues du champ électrique (14), lesdits écarts indiquant un ou des défauts le long de l'isolant (10).

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