Magnetically collapsible toggle linkage for electrical...

Details Magnetically collapsible toggle linkage for electrical... Magnetically collapsible toggle linkage for electrical...

H - Electricity

01

H

H01H 71/24 (2006.01) H01H 71/52 (2006.01) H01H 1/22 (2006.01)

Patent

CA 2366752

An electromagnetic blow-open device for a pole of a circuit breaker where the pole has a stationary contact and a movable contact. The movable contact includes contact fingers mounted on a contact carrier. The contacts have an open position and a closed position. The pole further has an associated rotatable pole shaft. The electromagnetic blow-open device includes a collapsible linkage having a rigid position and a changeable position. The collapsible linkage is disposed between, and coupled to, the pole shaft and contact carrier. The collapsible linkage is maintains the stationary contact and the movable contact in the closed position while the collapsible linkage is in the rigid position and to allow the stationary contact and the movable contact to move to the open position when the collapsible linkage is in said changeable position. The electromagnetic blow-open device also includes an actuator arm which is coupled to the collapsible linkage and is responsive to an over- current condition in the pole. The actuator arm is structured to shift the collapsible linkage from the rigid position to the changeable position.

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