Patent ID: 8134428

Claim:
A circuit breaker, comprising: a mechanical pole moveable between a latched position and an unlatched position to open an electrical connection between a pair of electrical contacts wherein the mechanical pole is coupled to a cradle which pivots about a pivot point such that, in the latched position, a latch bite portion of the cradle contacts a plunger and is biased by a spring against the plunger; and an electronic tripping device including a solenoid for tripping the mechanical pole, the electronic tripping device configured to sense and respond to at least one sensor signal, the at least one sensor signal being output from at least one condition sensor which detects at least one of an overload condition and an instantaneous condition wherein upon receiving the at least one sensor signal the electronic tripping device activates the solenoid to trip the mechanical pole into the unlatched position wherein during a condition, the cradle is released by the plunger to cause the mechanical pole to break contact between the electrical contacts.