Narrow multi-pole circuit breaker having bodily movable...

Details Narrow multi-pole circuit breaker having bodily movable... Narrow multi-pole circuit breaker having bodily movable...

H - Electricity

01

H

306/59

H01H 73/36 (2006.01) H01H 71/10 (2006.01)

Patent

CA 1044734

NARROW MULTI-POLE CIRCUIT BREAKER HAVING BODILY MOVABLE INSTANTANEOUS TRIP STRUCTURE Abstract of the Disclosure. A plurality of single pole circuit breakers stacked side-by-side are interconnected by a tie rod connecting the magnetic armatures of their respective instantaneous trip means. When one pole is caused to trip because of a fault condition a driving cam formation on the releasable cradle of the faulted pole engages the armature moving it in the tripping direction substantially beyond the point required for releasing the cradle latch in the faulted phase. Substantial movement beyond cradle release is permitted even though the magnetic air gap at the armature is small in that after this gap is closed the magnet is moved bodily in the tripping direction. This added movement assures that the tie rod shall transmit sufficient motion to all non-faulted poles to cause tripping thereof.

244878

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