Electrical insulators, materials and equipment

Details Electrical insulators, materials and equipment Electrical insulators, materials and equipment

H - Electricity

01

B

H01B 17/00 (2006.01) H01B 17/42 (2006.01) H01C 7/102 (2006.01)

Patent

CA 2435373

An elongate high voltage insulator (2) is formed of a rod or tube (4) of insulating material, with a pair of electrodes (6) spaced apart longitudinally thereof. At least part, and preferably the whole of the outer surface of the insulating material (4) is covered by a layer of material (8) comprising a particulate filler of varistor powder in a matrix having a switching electrical stress-controlling characteristic that is in electrical contact with each of the electrodes (6). The insulator core (4) may be made of porcelain, and the stress-controlling material (8) may comprise zinc oxide.

L'invention concerne un isolateur haute tension (2) allongé, formé d'une tige ou tube (4) de matériau isolant, avec une paire d'électrodes (6) espacées longitudinalement le long dudit tube. Au moins une partie de la surface extérieure, et de préférence toute la surface extérieure, du matériau isolant (4) est recouverte d'une couche de matériau (8) comprenant une charge particulaire d'une poudre de varistor dans une matrice possédant une caractéristique de commande de contrainte électrique de commutation, en contact électrique avec chacune des électrodes (6). La partie centrale (4) de l'isolateur peut être fabriquée en porcelaine, et le matériau de commande de contrainte (8) peut comprendre de l'oxyde de zinc.

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