Switching apparatus and activation suppression method for...

H - Electricity – 01 – H

Patent

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H01H 1/00 (2006.01) H01H 1/60 (2006.01) H01H 1/64 (2006.01) H01H 11/00 (2006.01) H01H 11/04 (2006.01)

Patent

CA 2221465

The invention provides a switching apparatus wherein the life and the reliability of an electric contact are improved by fundamentally suppressing formation of black powder and activation of the surface of the contact by a chemical reaction. Microcapsules in which organic acid or organic acid precursor from which organic acid is produced as time passes is enclosed are placed into the internal space of an enclosed case so that organic compounds produced on and in the proximity of contact surfaces is oxidized with organic acid which escapes from the microcapsules and vaporized in the enclosed case without forming a film on the surfaces of the contacts to suppress activation of the surfaces of the contacts.

Appareil de commutation où la durée de vie et la fiabilité d'un contact électrique sont améliorées en supprimant fondamentalement la formation de poudre noire et l'activation de la surface de contact par une réaction chimique. Des microcapsules, renfermant de l'acide organique ou un précurseur d'acide organique qui produit de l'acide organique avec le temps, sont placées dans l'espace intérieur d'un boîtier fermé de façon que les composés organiques produits sur les surfaces de contact ou à proximité de ces dernières soient oxydés avec l'acide organique qui s'échappe des microcapsules et se vaporisent dans le boîtier fermé sans former de pellicule sur les surfaces des contacts afin de supprimer leur activation.

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