Thermal circuit breaker

Details Thermal circuit breaker Thermal circuit breaker

H - Electricity

01

H

306/187

H01H 73/30 (2006.01) H01H 71/16 (2006.01)

Patent

CA 1290795

ABSTRACT OF THE DISCLOSURE An improved thermal circuit breaker is disclosed, featuring a U-shaped bimetallic element which latched an escapement locking arm which holds a spring biased moving contact against a fixed contact when the breaker is in the contacts closed position. The improved thermal element has terminal portions which are of lesser electrical resistivity than are other portions of the element. The relative orientation of the metals of the bimetallic element in the terminal portions are reversed with respect to their orientation in the remainder of the bimetallic element. In this way ambient temperature compensation is provided to the breaker such that the current rating of a given breaker does not vary with variation in ambient temperature.

559651

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