Molded case circuit breaker with calibration adjusting means...

Details Molded case circuit breaker with calibration adjusting means... Molded case circuit breaker with calibration adjusting means...

H - Electricity

01

H

306/165, 306/63

H01H 71/74 (2006.01) H01H 71/16 (2006.01)

Patent

CA 1237459

33 52,251 ABSTRACT OF THE DISCLOSURE A molded case circuit breaker includes a new and improved calibration adjusting means for a bimetal in a trip mechanism. The trip mechanism also includes a bimetal having a portion movable in re- sponse to predetermined overload conditions, an in- termediate control lever for adjusting the spatial disposition of the movable portion of the bimetal with respect to a trip bar of the trip mechanism and a rotatable adjustment means for adjusting the spatial disposition of the intermediate control lever in the circuit breaker. By rotating the adjustment means, the distance between the movable portion of the bimetal and the trip bar can be precisely adjust- ed via the intermediate control lever. The interme- diate control lever is coupled to a relatively sta- tionary portion of the bimetal thereby enabling such adjustment without applying undue stress to the mov- able portion of the bimetal.

485247

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