Reverse deflection prevention arrangement for a bimetal in a...

Details Reverse deflection prevention arrangement for a bimetal in a... Reverse deflection prevention arrangement for a bimetal in a...

H - Electricity

01

H

H01H 71/12 (2006.01) H01H 71/16 (2006.01) H01H 71/40 (2006.01)

Patent

CA 2281628

A reverse deflection prevention arrangement is provided for use in a circuit breaker for preventing a bimetal from bending in a direction opposite its normal thermal deflection. The reverse deflection prevention arrangement includes a tab portion extending from a yoke and a corresponding block member disposed on the inside surface of a circuit breaker cover. The tab portion engages the block member when the bimetal is forced to deflect in the direction opposite its normal deflection. An alternate embodiment of the reverse deflection prevention arrangement includes a reinforcement member secured to one end of the bimetal. The reinforcement member strengthens and supports the bimetal so that it is prevented from bending in the direction opposite its normal thermal deflection.

L'invention concerne un dispositif de protection contre le fléchissement en sens inverse, destiné à un disjoncteur et empêchant un bilame de fléchir dans un sens contraire à celui de son fléchissement thermique normal. Le dispositif de protection contre le fléchissement en sens inverse comprend une partie languette, qui s'étend depuis une bascule, et un élément bloc correspondant, disposé sur la surface interne d'un boîtier de disjoncteur. La partie languette met en prise l'élément bloc lorsque le bilame est contraint de fléchir dans un sens contraire à celui de son fléchissement normal. Dans un autre mode de réalisation du dispositif de protection contre le fléchissement en sens inverse, le dispositif comprend un élément de renfort solidarisé à l'une des extrémités du bilame. Cet élément renforce et soutient le bilame de manière à l'empêcher de fléchir dans le sens contraire à celui de son fléchissement thermique normal.

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