Circuit breaker with improved impact resistance

H - Electricity – 01 – H

Patent

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Details

H01H 71/52 (2006.01)

Patent

CA 2221993

The present invention provides a circuit breaker assembly having a base, cover, and switch handle adapted to withstand an external force applied to a lever of the switch handle. During normal operation the handle rotates on small-diameter pivots in elongated bearing slots. When the lever is inadvertently struck, such as when the circuit breaker is dropped on the lever, the pivots slide in the elongated bearing slots. The force is borne by large-diameter hubs which come into contact with mating bearing surfaces. Thus, the pivots are not shorn off during such incidents, which would damage the circuit breaker.

La présente invention concerne un ensemble coupe-circuit constitué d'un socle, d'un couvercle, et d'une manette de commutation conçue pour résister à une force appliquée à un levier de la manette de commutation. En fonctionnement normal, la manette pivote sur des pivots de petit diamètre reçus dans des paliers en fente allongée. Lorsqu'on donne par inadvertance un coup sur la manette, par exemple lorsque quelque chose tombe sur la manette, les pivots coulissent dans les paliers en fente allongée. La force y est alors supportée par des moyeux de grand diamètre qui entrent en contact avec des surfaces de paliers correspondantes. Cela évite d'arracher les pivots à l'occasion de tels incidents, ce qui serait susceptible d'endommager le coupe-circuit.

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