Circuit breaker with moving magnetic core for low current...

Details Circuit breaker with moving magnetic core for low current... Circuit breaker with moving magnetic core for low current...

H - Electricity

01

H

306/81

H01H 71/24 (2006.01) H01H 71/34 (2006.01) H01H 71/40 (2006.01)

Patent

CA 2025781

A circuit breaker is disclosed having a movable magnetic core provided in the magnetic trip assembly thereof adapted to lower the current levels at which the magnetic trip mechanism will operate. The magnetic trip assembly also includes a pivotally connected armatures a current carrying conductor, a fixed magnetic yoke and a latchable operating mechanism. A primary air gap exists between the armature and the fixed yoke. The movable core is designed to move into an extended position which reduces the primary air gap which in turn increases magnetic flux coupling which allows the magnetic force required for the armature to pivotally rotate to unlatch the operating mechanism and thereby trip the circuit breaker to be generated at a lower current level. This reduction in current is the desired effect of the new design.

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