Turbulator means for an electrical device for interrupting...

H - Electricity – 01 – H

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H01H 33/08 (2006.01) H01H 9/34 (2006.01) H01H 71/00 (2006.01)

Patent

CA 2197974

An electrically insulated turbulator for use in an electrical device for automatically interrupting an overload current is a one-piece molded assembly with an arcuate portion arranged around a terminal screw and a downwardly turned flange for shielding the terminal from the ionized gases in the arc chute. The arcuate portion has several fins and spaced-apart planar portions, both of which are located in the path of the ionized gases. The planar portions have surfaces which cooperate with the fins to create a turbulent flow pattern to decrease the length of the gas flow, and thereby optimize the cooling effect on the gases and for directing the gas flow in a desired direction. The turbulator is preferably made of a gassing material which contributes to the deionizing of the gasses, which lessens the buildup of gas pressure. It also preferably has a blowout membrane in order to limit the back pressure in the device.

Agitateur isolé, faisant partie d'un dispositif électrique d'interruption automatique de courant de surcharge, constitué d'un assemblage moulé monobloc comprenant une portion arquée faisant le tour d'une vis borne et d'un rabat dirigé vers le bas, destiné à protéger la borne des gaz ionisés de la chambre de coupure. La portion arquée comporte plusieurs pales et sections planaires espacées, toutes les deux situées sur le trajet des gaz ionisés. Les surfaces des sections planaires fonctionnent de pair avec les pales pour créer une configuration d'écoulement turbulente afin de réduire la longueur du débit gazeux, ce qui permet d'optimiser l'effet de refroidissement des gaz, et pour diriger le débit gazeux dans la direction désirée. L'agitateur est, de préférence, fabriqué d'un matériau de gazage, qui contribue à la déionisation des gaz, ce qui diminue l'accumulation de la pression du gaz. Il comprend également, de préférence, une membrane de rupture en vue de limiter la contre-pression à l'intérieur du dispositif.

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