Current limiting circuit breaker with pivoting contact arm

Details Current limiting circuit breaker with pivoting contact arm Current limiting circuit breaker with pivoting contact arm

H - Electricity

01

H

306/281

H01H 71/24 (2006.01) H01H 77/10 (2006.01)

Patent

CA 1121414

ABSTRACT OF THE DISCLOSURE . A current limiting circuit breaker includes two parallel pivoting contact arms carrying contacts at the ends thereof. The upper arm is double pivoted and is operated by a mechanism between open and closed positions. A magnetic drive slot motor device surrounds the lower arm and operates during extreme overcurrent conditions to draw the lower arm down and aid in rapidly separating the contacts. An arm positioning assembly is spring loaded to bias the lower arm toward a closed circuit position and provide contact closing force, the upper limit of travel being set by a rod extend- ing through the end of the lower contact arm to abut against the slot motor.

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